Abstract

sc2) of switches of the second switching circuit (SC2) is controlled to be ON in the second half period TB minus time interval ΔTBS1 and minus time interval ΔTBE2, where the time interval ΔTBS1 is provided at the beginning of the second half period TB and where the time interval ΔTBE2 is provided in the end of the second half period TB. Time intervals Tsc1off1 and Tsc2off1, and time intervals Tsc1off2 and Tsc2off2, where the sets of the first and second switching circuits all are off, are at least partially overlapping.

IPC Classes  ?

• 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

Abstract

The invention relates to a method for controlling a series resonant DC/DC converter. The method comprises the steps of: defining a switching period TP having a first half period TA and a second half period TB and defining a subsequent switching period TP+1 after the switching period TP. In a next step, a first set (S1sc1; S1sc1, S4sc1) of switches of a first switching circuit (SC1) is controlled to be ON from the beginning Tstart of the first half period TA minus a time interval ΔTAE1, where the time interval ΔTAE1 is provided at the end of the first half period TA and a second set(S2sc1; S2sc1, S3sc1) of switches of the first switching circuit (SC1) is controlled to be ON from the beginning Tcenter of the second half period TB minus a time interval ΔTBE1, where the time interval ΔTBE1 is provided at the end of the second half period TB. A first set (S1sc2; S1sc2, S4sc2) of switches of a second switching circuit (SC2) is controlled to be ON in the first half period TA minus a time interval ΔTAS1 and minus a time interval ΔTAE2, where the time interval ΔTAS1 is provided at the beginning of the first half period TA and where the time interval ΔTAE2 is provided at the end of the first half period TA and a second set (S2sc2; S2sc2, S3sc2) of switches of the second switching circuit (SC2) is controlled to be ON in the second half period TB minus time interval ΔTBS1 and minus time interval ΔTBE2, where the time interval ΔTBS1 is provided at the beginning of the second half period TB and where the time interval ΔTBE2 is provided in the end of the second half period TB. Time intervals Tsc1off1 and Tsc2off1, and time intervals Tsc1off2 and Tsc2off2, where the sets of the first and second switching circuits all are off, are at least partially overlapping.

IPC Classes  ?

• 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

Abstract

The invention relates to a series resonant DC/DC converter comprising:first DC terminals (T1P, T1N); second DC terminals (T2P, T2N); an inductor device (ID; TD); and a first switching circuit (SC1) connected between the first DC terminals (T1P, T1N) and the inductor device (ID; TD). The first switching circuit (SC1) comprises a first set (S1sc1; S1sc1, S4sc1) of switches and a second set (S2sc1; S2sc1, S3sc1) of switches. A second switching circuit (SC2) and a resonant circuit (RC) are connected between the second DC terminals (T2P, T2N) and the inductor device (ID; TD), where the second switching circuit (SC2) comprises a first set (S1sc2; S1sc2, S4sc2) of switches and a second set (S2sc2; S2sc2, S3sc2) of switches. A control circuit for controlling the set of switches of the first and second switching circuits (SC1, SC2) to control the current and/or voltage at either the first DC terminals (T1P, T1N) or the second DC terminals (T2P, T2N).

IPC Classes  ?

• 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

Abstract

The present invention relates to a device arranged for converting an AC input voltage to a DC output voltage, comprising a bridgeless boost converter; and a surge protection system. The surge protection system comprises a first protection diode (Dprot1), where the anode is connected to a first AC input terminal and the cathode is connected to a positive boost output terminal (Obp); a second protection diode (Dprot2), where the anode is connected to a negative boost output terminal (Obn) and the cathode is connected to the first AC input terminal; a third protection diode (Dprot3), where the anode is connected to a second AC input terminal and the cathode is connected to the positive boost output terminal (Obp); and a fourth protection diode (Dprot4), where the anode is connected to the negative boost output terminal (Obn) and the cathode is connected to the second AC input terminal.

IPC Classes  ?

• H02H 3/22 - Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition, with or without subsequent reconnection responsive to excess voltage of short duration, e.g. lightning

Abstract

The present invention relates to a resistor device for connection between a miniature circuit breaker (20) and a bus bar (22). The resistor device comprises an MCB connector (2) for connection to the miniature circuit breaker (20) and a bus bar connector (3) for connection to the bus bar (22). Moreover, the resistor device comprises a body (4) fixed to the MCB connector (2) and the bus bar connector (3), where the body (4) comprises a sheet of a metallic resistive material. At least one notch (5) is provided in the body (4), having a first end (15) opening towards the periphery of the body (4) and a second end (16) provided substantially in a central area (7) of the body (4). The at least one notch defines a current flow line (6) between the MCB connector (2) and the bus bar connector (3). The total resistance between the MCB connector (2) and the bus bar connector (3) is approximately 20 - 40 mΩ.

IPC Classes  ?

• H01C 7/00 - Non-adjustable resistors formed as one or more layers or coatingsNon-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
• H01C 17/22 - Apparatus or processes specially adapted for manufacturing resistors adapted for trimming
• H01H 73/00 - Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism

Abstract

The invention relates to a power supply system for mounting to a rail, comprising an AC/DC converter for converting high voltage AC power to low voltage DC power and a controller for controlling the power supply system. The system comprises an AC/DC converter and controller module (A1) for mounting to the rail and for connection to the AC/DC converter and controller respectively. The system also comprises a battery connection and LVBD contactor module (A2) for mounting to the rail and for connection to a first battery. A first load connection module (A41) is provided for mounting to the rail and for connection to a first load. The LVBD contactor of the battery connection and LVBD contactor module (A2) is provided for controlled connection or disconnection of the first battery. First and second connection interfaces between the modules comprise DC power terminals for transferring DC power and signal terminals for transferring control signals.

IPC Classes  ?

• H02J 1/10 - Parallel operation of dc sources
• 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

Abstract

Protection system for a resonant converter with synchronous rectification. The resonant converter is comprising a control system for providing a control signal to first and second rectifier switches (Sr1, Sr2) of the converter. The protection system comprises a first sensing means (1) for measuring the voltage over the first rectifier switch (Sr1) and a second sensing means (2) for measuring the voltage over the second rectifier switch (Sr2); and an override circuit (OC1, OC2) for each of the first and second rectifier switches (Sr1, Sr2), for overriding the control signal from the control system when the measured voltage over the opposite rectifier switch (Sr1, Sr2) is below a predetermined threshold value Vref.

IPC Classes  ?

• 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 1/38 - Means for preventing simultaneous conduction of switches

Abstract

Method and control system for controlling a bridgeless boost converter, comprising a first measuring unit measuring a first value representing a first current through a first boost switch (Sb1) of the bridgeless boost converter; a second measuring unit measuring a second value representing a second current through a second boost switch (Sb2) of the bridgeless boost converter; a third current measuring unit measuring a third value representing a third current representing the sum of the currents through the components of a stabilization system. A measured signal up is computed by means of the first, second and third currents. A reference signal representing the input voltage Vac is formed. The measured signal up and the reference signal representing the input voltage Vac are input to the control system for controlling the switches (Sb1, Sb2) so that the measured signal up is substantially in phase with the reference signal representing the input voltage Vac.

IPC Classes  ?

• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

The present invention relates to a device arranged for converting an AC input voltage to a DC output voltage, comprising a bridgeless boost converter; and a surge protection system. The surge protection system comprises a first protection diode (Dprot1), where the anode is connected to a first AC input terminal and the cathode is connected to a positive boost output terminal (Obp); a second protection diode (Dprot2), where the anode is connected to a negative boost output terminal (Obn) and the cathode is connected to the first AC input terminal; a third protection diode (Dprot3), where the anode is connected to a second AC input terminal and the cathode is connected to the positive boost output terminal (Obp); and a fourth protection diode (Dprot4), where the anode is connected to the negative boost output terminal (Obn) and the cathode is connected to the second AC input terminal.

IPC Classes  ?

• H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
• H02H 7/125 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for convertersEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for rectifiers for static converters or rectifiers for rectifiers
• H02M 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

The present invention relates to a device arranged for converting an AC input voltage to a DC output voltage, comprising a bridgeless boost converter; and a protection and stabilisation system. The protection and stabilisation system comprises a first protection diode (D1), where the anode is connected to a first AC input terminal and the cathode is connected to a positive boost output terminal (Obp); a second protection diode (D2), where the anode is connected to a negative boost output terminal (Obn) and the cathode is connected to the first AC input terminal; a third protection diode (D3), where the anode is connected to a second AC input terminal and the cathode is connected to the positive boost output terminal (Obp); and a fourth protection diode (D4), where the anode is connected to the negative boost output terminal (Obn) and the cathode is connected to the second AC input terminal. A capacitor (C1-C4) is connected in parallel with each of the protection and stabilization diodes (D1-D4).

IPC Classes  ?

• H02M 7/06 - Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
• H02M 1/12 - Arrangements for reducing harmonics from AC input or output

Abstract

The present invention relates to a power supply system for converting an AC voltage to a DC voltage. The system comprises a bridgeless boost converter for converting the AC voltage to an intermediate high voltage DC; a LLC resonant circuit comprising an insulation transformer device, for converting the intermediate high voltage DC into a low voltage high frequency AC; a synchronous rectifier connected to the resonant circuit, for converting the low voltage high frequency AC into the DC voltage.

IPC Classes  ?

• 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 1/42 - Circuits or arrangements for compensating for or adjusting power factor in converters or inverters

Abstract

The present invention relates to a plate stack for use in a heat exchanger, a heat exchanger and a method for exchanging heat between two flowing fluids. A plate stack for use in a heat exchanger comprising at least two first plates 41A and at least one second plate 41B and where the plates at two opposite edges comprises at least one raised arc inlet portion and one sunken arc inlet portion arranged when assembled form an opening for the first fluid flow between the one first plate 41A and the one second plate 41B and an opening 403,403B for the second fluid flow between the one second plate 41B and the second first plate 41A'. The invention also regards a heat exchanger where such a plate stack is used and a method for exchanging heat between two fluid flows. Such a heat exchanger may for instance be used in an outdoor cabinet, and gives a possibility of crating a hermetic cooling and preventing dust from entering the cabinet.

IPC Classes  ?

• F28D 9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall