A Direct Current (DC) backup power system is provided in the present disclosure, comprising a three-port module and an energy storage battery, wherein the three-port module comprises a rectifier unit and a charging and discharging unit, wherein the rectifier unit is connected to the charging and discharging unit, the charging and discharging unit is connected to the energy storage battery, and an output end of the rectifier unit is connected to a load; the rectifier unit comprises a DCDC converter; a first end of the energy storage battery is connected to a first output end of the DCDC converter, and a second end of the energy storage battery is connected to a second output end of the DCDC converter through the charging and discharging unit. The DC backup power system according to the embodiments of the present disclosure improve the service life of the energy storage battery.
H02J 9/06 - Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 3/24 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
A power circuit includes a power input terminal, a power factor correction circuit, a DC-DC conversion circuit and a power output terminal connected in sequence. The power factor correction circuit includes an input rectifier unit, a first inductor, a first diode, a first capacitor, a power switch transistor, and a rheostat unit.
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 1/36 - Means for starting or stopping converters
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
3.
DIRECT CURRENT TO DIRECT CURRENT (DCDC) CONVERTER AND CONTROL METHOD
The present disclosure provides a Direct Current to Direct Current (DCDC) converter and a control method thereof. The Direct Current to Direct Current (DCDC) converter comprises: at least one DCDC conversion module and a controller, wherein each of the DCDC conversion modules comprises two bidirectional isolated DCDC units connected in parallel, each of the bidirectional isolated DCDC units comprises a resonant circuit and a non-isolated buck/boost circuit connected in cascade; if the number of the DCDC conversion modules is greater than or equal to 2, the DCDC conversion modules are connected in parallel; the controller is connected to each of the bidirectional isolated DCDC units, and control current sharing among the non-isolated buck/boost circuits. The Direct Current to Direct Current (DCDC) converter and the control method thereof according to the embodiments of the present disclosure reduce the manufacturing cost of the Direct Current to Direct Current (DCDC) converter.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
H02M 3/00 - Conversion of DC power input into DC power output
4.
THREE-LEVEL CONTROL CIRCUIT, POWER CONVERSION DEVICE, AND CONTROL METHOD THEREOF
The present application provides a three-level control circuit, a power conversion device and a control method thereof. The three-level control circuit includes two first main lines and two second main lines between a three-phase port and a two-phase terminal thereof. The first main line includes a plurality of first conversion branches, the second main line includes two capacitor branches and a plurality of second conversion branches, and the first conversion branches and the second conversion branches are in interleaved connection by an inverter interleaving technology. Each of the capacitor branches has a third capacitor and a fourth capacitor connected in series. The plurality of the first conversion branches of each of the first main lines are respectively connected to correspond to the capacitor branch, and a connection point is located between the third capacitor and the fourth capacitor.
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
The present disclosure provides a power supply system and a power supply method, which can be applied to the field of power distribution technologies. The power supply system comprises: a DC rectifying device, an industrial frequency transformer and at least two power supply devices, wherein the industrial frequency transformer is connected between the power supply device and the DC rectifying device, and the DC rectifying device is further connected to a load. The power supply system and the power supply method according to the embodiments of the present disclosure reduce the development cost and the development period of the power supply system.
H02J 3/36 - Arrangements for transfer of electric power between ac networks via a high-tension dc link
H02M 5/10 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers
6.
STEP-DOWN CIRCUIT, STEP-DOWN CIRCUIT CONTROL METHOD AND APPARATUS, AND SYSTEM
The embodiments of the present application provide a step-down circuit, a step-down circuit control method and apparatus, and a system. The step-down circuit comprises: a primary switch element and an inductor which are connected to a voltage input end and a voltage output end; a resonant element connected in series between the primary switch element and the inductor; an auxiliary switch element additionally connected in parallel between the resonant element and the inductor; and a switch tube connected in parallel to the inductor, one end of the switch tube being grounded, and the other end of the switch tube being connected between the resonant element and the inductor; wherein the on and off states of the auxiliary switch element are opposite to those of the primary switch element. The present application achieves the effect of a greater step-down proportion.
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
7.
DIRECT-CURRENT POWER SUPPLY SYSTEM HAVING FIXED OUTPUT VOLTAGE
A direct-current power supply system having a fixed output voltage. The system comprises: at least one battery pack (1), and a power supply module (2) corresponding to each battery pack (1), wherein: a first end of each battery pack (1) is connected to the corresponding power supply module (2), a second end of each battery pack (1) is connected to a direct-current bus, and the output of each power supply module (2) is on the direct-current bus; wherein the first end of each battery pack (1) is a positive electrode, and the second end of each battery pack (1) is a negative electrode; or the first end of each battery pack (1) is a negative electrode, and the second end of each battery pack (1) is a positive electrode. The direct-current power supply system having a fixed output voltage reduces downstream direct-current power distribution costs.
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
8.
MULTI-TRANSFORMER DC-DC CIRCUIT, AND CURRENT EQUALIZATION SYSTEM
The present application relates to the technical field of electronic power. Disclosed are a multi-transformer DC-DC circuit, and a current equalization system. The circuit comprises two LLC circuits, each LLC circuit comprising a primary-side circuit, a secondary-side circuit and m transformers; and each transformer comprises two primary-side windings and one secondary-side winding, wherein a first primary-side winding of an ith transformer of a first LLC circuit is connected to a first primary-side winding of an ith transformer of a second LLC circuit in series, and is then connected to a corresponding primary-side circuit, and a second primary-side winding of the ith transformer of the first LLC circuit is connected to a second primary-side winding of the ith transformer of the second LLC circuit in series, and is then connected to the corresponding primary-side circuit; and a secondary-side winding of each transformer is connected to a corresponding secondary-side circuit. The present application naturally realizes the power equalization between two power units, which is natural current equalization, thereby simplifying a control scheme, and improving the reliability of a circuit.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
9.
POWER SUPPLY CIRCUIT AND APPARATUS SUITABLE FOR WIDE-RANGE OUTPUT, SYSTEM AND CONTROL METHOD
Provided in the present application are a power supply circuit and apparatus suitable for wide-range output, a system and a control method. The apparatus comprises: a full-bridge LLC topological circuit, a primary side circuit of the full-bridge LLC topological circuit comprising a first bridge arm and a second bridge arm. The first input voltage of the full-bridge LLC topological circuit is greater than the second input voltage of the LLC circuit, the first input voltage being the input end voltage of the first bridge arm, and the second input voltage being the input end voltage of the second bridge arm. The power supply circuit suitable for wide-range output provided by the embodiment of the present application can achieve a nearly two-fold output voltage regulation range while maintaining high efficiency.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 3/00 - Conversion of DC power input into DC power output
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
The present application provides a circuit control method and unit, and an apparatus. The method is applied to a power supply apparatus; the power supply apparatus comprises a switch boost circuit; and the switch boost circuit comprises at least one power semiconductor device. The circuit control method comprises: collecting an input signal and an output signal of the switch boost circuit; according to the input signal, the output signal, and circuit information of the switch boost circuit, determining, as a target control solution, a control solution having the highest electric energy conversion efficiency from a plurality of control solutions to be selected, wherein the control solutions to be selected comprise control solutions corresponding to each of a plurality of working modes of the switch boost circuit for the at least one power semiconductor device; and controlling on and off of the at least one power semiconductor device according to the target control solution. According to the present application, the control solution of a power semiconductor device can be adjusted in time, thereby improving the overall electric energy conversion efficiency of the circuit.
H02M 7/217 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
11.
PLANAR TRANSFORMER ASSEMBLY AND PLANAR TRANSFORMER APPARATUS
The present application discloses a planar transformer assembly and a planar transformer apparatus. The planar transformer assembly comprises: a winding body comprising a primary winding and a secondary winding; a primary side wire electrically connected to the primary winding and being led out from a first side of the winding body; and a secondary side wire electrically connected to the secondary winding and being led out from a second side of the winding body. An included angle is formed between the extending direction of the secondary wire and a direction from the first side to a third side. The present application can reduce the alternating current loss and the leakage inductance loss.
H01F 27/34 - Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
H01F 27/30 - Fastening or clamping coils, windings, or parts thereof togetherFastening or mounting coils or windings on core, casing, or other support
A power supply system includes: a first direct current (DC) input terminal for providing first initial DC power; a second DC input terminal for providing second initial DC power; a transfer switch unit coupled to the first DC input terminal and the second DC input terminal, wherein the transfer switch unit is configured to select the first initial DC power or the second initial DC power as third initial DC power input to the power supply system; and conversion circuitry coupled to the transfer switch unit, wherein the conversion circuitry is configured to convert the third initial DC power into a target power supply for a load device.
A power supply system includes a power input terminal, a rectifying circuit and a power output terminal coupled in sequence. The rectifying circuit includes an AC-DC conversion circuit and a DC-DC conversion circuit coupled via a first DC bus. The power supply system further includes at least one energy storage circuit coupled to the first DC bus. When AC power is input to the power input terminal, the AC-DC conversion circuit can convert the AC power into first DC power and input the first DC power to the energy storage circuit so that the energy storage circuit is charged. When the AC power fails to be input to the power input terminal, the energy storage circuit can discharge by outputting second DC power to the DC-DC conversion circuit.
H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
H02M 3/158 - Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
H02M 1/32 - Means for protecting converters other than by automatic disconnection
H02J 7/06 - Regulation of the charging current or voltage using discharge tubes or semiconductor devices
The present application provides a power circuit and a power adapter. The power circuit comprises a power input end, a power factor correction module, a DC-DC conversion module, and a power output end which are coupled in sequence. The power factor correction module comprises an input rectifier unit, a first inductor, a first diode, a first capacitor, a power switch transistor, and a variable resistance unit. According to the present application, the height of an overcurrent protection point can be adjusted, such that the problem that the over-current protection point is set too low to meet the full-power output of the power circuit is solved.
H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
H02J 7/02 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
H02M 7/02 - Conversion of AC power input into DC power output without possibility of reversal
H02M 7/219 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
A power control circuit and a control method thereof. The circuit includes: a power supply module, a voltage change signal module, an output module, a first switch module and a second switch module; the power supply module is configured to output power supplies of different power through two output terminals according to an output of an external power supply end and a received first control signal; the output module is configured to provide the power supplies to an information processing system connected to the output module, and transmit a trigger signal provided by the information processing system to the voltage change signal module; the first switch module and the second switch module are configured to disconnect and conduct a power supply channel between the output module and the power supply module according to a received second control signal and third control signal; the voltage change signal module is configured to output the first control signal to the power supply module according to the trigger signal, and output the second control signal and the third control signal to the first switch module and the second switch module, respectively.
The present disclosure provides a circuit control method and a circuit control apparatus, which are applied to a hybrid flyback circuit. The method includes: determining an acquisition time point according to a turn-on alternating duration of a first MOS switch and a second MOS switch on a main side of the hybrid flyback circuit and a preset time coefficient; acquiring a midpoint voltage between the first MOS switch and the second MOS switch according to the acquisition time point to obtain a first voltage signal; and adjusting negative excitation current in the hybrid flyback circuit according to a comparison result of the first voltage signal and a preset voltage value, so that the negative excitation current meets zero voltage switching of a primary-side switch of the hybrid flyback circuit.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
Provided in the present application are a power supply system and a power supply method, which can be applied to the technical field of power distribution. The power supply system comprises: a direct-current rectifying device, an industrial frequency transformer and at least two power supply devices, wherein the industrial frequency transformer is connected between the power supply devices and the direct-current rectifying device, and the direct-current rectifying device is further connected to a load. By means of the power supply system and the power supply method provided in the embodiments of the present application, the development cost of a power supply system can be reduced, and the development cycle thereof can be shortened.
H02J 3/38 - Arrangements for parallelly feeding a single network by two or more generators, converters or transformers
H02J 3/46 - Controlling the sharing of output between the generators, converters, or transformers
H02M 5/10 - Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into DC by static converters using transformers
18.
THREE-LEVEL CONTROL CIRCUIT, AND POWER CONVERSION DEVICE AND CONTROL METHOD THEREFOR
The present application provides a three-level control circuit, and a power conversion device and a control method therefor. Two first main lines and two second main lines are included between a three-phase port and a two-phase terminal of the three-level control circuit; each first main line comprises a plurality of first conversion branches, each second main line comprises two capacitor branches and a plurality of second conversion branches, and the first conversion branches and the second conversion branches are interleaved and connected by means of an inverter interleaving technique; a third capacitor and a fourth capacitor are connected in series on each capacitor branch, the plurality of first conversion branches of each first main line are respectively connected to the corresponding capacitor branch, and the connection point is located between the third capacitor and the fourth capacitor.
H02M 7/797 - Conversion of AC power input into DC power outputConversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
H02M 1/088 - Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
H02M 1/14 - Arrangements for reducing ripples from DC input or output
19.
DIRECT CURRENT TO DIRECT CURRENT (DC-DC) CONVERTER AND CONTROL METHOD THEREFOR
The present application provides a direct current to direct current (DC-DC) converter and a control method therefor. The DC-DC converter comprises at least one DC-DC conversion module (1) and a controller; each DC-DC conversion module (1) comprises two bidirectional isolated DC-DC units (11) connected in parallel; each bidirectional isolated DC-DC unit (11) comprises a resonant circuit (111) and a non-isolated buck/boost circuit (112); the resonant circuits (111) and the non-isolated buck/boost circuits (112) are cascaded; the working frequency of the resonant circuits (111) is fixed; if the number of the DC-DC conversion modules (1) is greater than or equal to 2, the DC-DC conversion modules (1) are connected in parallel; the controller is electrically connected with each bidirectional isolated DC-DC unit (11), and the controller is used for controlling the current sharing of the non-isolated buck/boost circuits (112). The method is used for said DC-DC converter. According to the DC-DC converter and the control method therefor provided by embodiments of the present application, the manufacturing cost of the DC-DC converter is reduced.
H02M 3/335 - Conversion of DC power input into DC power output with intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate AC using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
09 - Scientific and electric apparatus and instruments
35 - Advertising and business services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Chargers for electric accumulators; chargers for general purpose batteries; circuit boards provided with integrated circuits; computer keyboards; computer monitors; computer mouse; computer programs for connecting to remote computers and computer networks; computer scanners; computer servers; computer speakers; converters for electric plugs; DC/DC converters; electric transformers; electrical charge controllers; electrical controllers for governing the electrical output of rechargeable batteries; electrical inductors; electronic controllers for use with power converters; electronic frequency converters for high velocity electro motors; electronic integrated circuits; fuel cells; GPS transmitters; high voltage transformers; inverters for power supply; low-voltage power supplies; microwave antennas; photoelectric sensors; power banks; power controllers for fuel cells; radar transmitters; radio transmitters; radio-frequency transmitters; rectifier modules; rectifiers; satellite transmitters; semiconductors; sensors for determining position; sensors for determining temperature; sensors for determining velocity; telephone transmitters; USB chargers; voltage stabilizing power supply; wireless charging stands for smartphones (1) Advertising the goods and services of others; distribution of samples for others for publicity purposes; online advertising for others via a computer communications network; preparing and placing outdoor advertisements for others; rental of advertising billboards; rental of advertising space; rental of exhibition stands; systemization of information into computer databases; window dressing services for advertising purposes
(2) Product demonstrations of power supplies
(3) Advice relating to the design of computer systems; advisory services in the field of cloud computing networks and applications; computer programming; computer technology consultancy services; consultancy in the design and development of computer hardware; monitoring of computer system operation by remote access; providing information on computer technology and programming via a web site; research and development of new products for others; updating of computer software
(4) Research and development of technology in the field of power supplies
09 - Scientific and electric apparatus and instruments
35 - Advertising and business services
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Chargers for electric accumulators; chargers for general purpose batteries; circuit boards provided with integrated circuits; computer keyboards; computer monitors; computer mouse; computer programs for connecting to remote computers and computer networks; computer scanners; computer servers; computer speakers; converters for electric plugs; DC/DC converters; electric transformers; electrical charge controllers; electrical controllers for governing the electrical output of rechargeable batteries; electrical inductors; electronic controllers for use with power converters; electronic frequency converters for high velocity electro motors; electronic integrated circuits; fuel cells; GPS transmitters; high voltage transformers; inverters for power supply; low-voltage power supplies; microwave antennas; photoelectric sensors; power banks; power controllers for fuel cells; radar transmitters; radio transmitters; radio-frequency transmitters; rectifier modules; rectifiers; satellite transmitters; semiconductors; sensors for determining position; sensors for determining temperature; sensors for determining velocity; telephone transmitters; USB chargers; voltage stabilizing power supply; wireless charging stands for smartphones (1) Advertising the goods and services of others; distribution of samples for others for publicity purposes; online advertising for others via a computer communications network; preparing and placing outdoor advertisements for others; rental of advertising billboards; rental of advertising space; rental of exhibition stands; systemization of information into computer databases; window dressing services for advertising purposes
(2) Product demonstrations of power supplies
(3) Advice relating to the design of computer systems; advisory services in the field of cloud computing networks and applications; computer programming; computer technology consultancy services; consultancy in the design and development of computer hardware; monitoring of computer system operation by remote access; providing information on computer technology and programming via a web site; research and development of new products for others; updating of computer software
(4) Research and development of technology in the field of power supplies
09 - Scientific and electric apparatus and instruments
35 - Advertising and business services
42 - Scientific, technological and industrial services, research and design
Goods & Services
chargers for electric accumulators; USB chargers; transformers [electricity]; Wireless chargers; inverters [electricity]; circuit boards provided with integrated circuits; computer peripheral devices; Electronic frequency converters for high velocity electro motors; low-voltage power supplies; battery charge devices; Power banks (rechargeable batteries); DC/DC converters; stabilised-voltage power supplies; converters for electric plugs; power controllers; Rectifier modules; electrical control devices for energy management; rectifiers [electricity]; high voltage transformers; semiconductor devices; Electronic integrated circuits; Microwave antennas; Radio-frequency transmitters; Sensors; inductors [electricity]; radio transmitters; transmitters [telecommunication]; computer programs for the enabling of access or entrance control; computer servers; Fuel cells. Outdoor advertising; Demonstration of goods; Distribution of samples; Publicity material rental; Advertising; online advertising on a computer network; Shop window dressing; Systemization of information into computer databases. computer technology consultancy; computer system design; computer programming; updating of computer software; consultancy in the design and development of computer hardware; monitoring of computer system operation by remote access; providing information relating to computer technology and programming via a website; cloud computing; technological research; research and development of new products for others.
09 - Scientific and electric apparatus and instruments
35 - Advertising and business services
42 - Scientific, technological and industrial services, research and design
Goods & Services
chargers for electric accumulators; USB chargers; transformers [electricity]; Wireless chargers; inverters [electricity]; circuit boards provided with integrated circuits; computer peripheral devices; Electronic frequency converters for high velocity electro motors; low-voltage power supplies; battery charge devices; Power banks (rechargeable batteries); DC/DC converters; stabilised-voltage power supplies; converters for electric plugs; power controllers; Rectifier modules; electrical control devices for energy management; rectifiers [electricity]; high voltage transformers; semiconductor devices; Electronic integrated circuits; Microwave antennas; Radio-frequency transmitters; Sensors; inductors [electricity]; radio transmitters; transmitters [telecommunication]; computer programs for the enabling of access or entrance control; computer servers; Fuel cells. Outdoor advertising; Demonstration of goods; Distribution of samples; Publicity material rental; Advertising; online advertising on a computer network; Shop window dressing; Systemization of information into computer databases. computer technology consultancy; computer system design; computer programming; updating of computer software; consultancy in the design and development of computer hardware; monitoring of computer system operation by remote access; providing information relating to computer technology and programming via a website; cloud computing; technological research; research and development of new products for others.
