A Method for Estimating State of Charge and State of Health of Battery and a System thereof The present invention relates to a method (200) and system (100) for estimating state of charge and state of health of a battery (10). A first vector (x) and a second vector (0) are initialised. The first vector (x) is estimated and updated by a first state-space filter based first equivalent circuit solver by assuming a fixed value of the second vector (0). the second vector (0) is estimated and updated based on an Electrochemical Model and then by a second state-space filter based second equivalent circuit solver. The updated values of the second vector (0) by the Electrochemical Model and the second state-space filter based equivalent circuit solver are merged. The state of charge is obtained from the updated value of the first vector (x), and the state of the health is obtained from the merged and updated value of the second vector (0).
The present invention relates to a method (200) and system (100) for controlling a rotary electric machine wherein a state of the rotary electric machine is determined between a low speed state and a high speed state. In the low speed state, a first rotor position (P1) and a first rotor speed (S1) are estimated based on intra-PWM current ripple (ΔX), a mean current vector (Y) and an inductance vector. A second rotor position (P2) and second rotor speed (S2) is estimated based on average current flowing through stator phase windings. State of rotary electric machine is selected based on estimated first rotor speed (S1) and/or estimated second rotor speed (S2). At low speed state, PWM signals are updated based on estimated first rotor position (P1), and at high speed state, PWM signals are updated based on estimated second rotor position (P2).
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
H02P 6/00 - Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor positionElectronic commutators therefor
An Integrated Starter Generator System The present invention relates to an Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 6n stator teeth (132′), ‘n’ being a natural number, and each stator tooth (132′) has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 6n±2 rotor poles (134′) facing the stator, and magnets on the rotor poles (134′) are disposed with an alternating sequence of magnet polarity facing the stator (132).
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
An Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 3n stator teeth (132′), ‘n’ being a natural number, and each stator tooth (132′) has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 4n rotor poles (134′) facing the stator (132), and magnets on the rotor poles (134′) are disposed with an alternating sequence of magnet polarity facing the stator (132). Herein, back-emf constant of the electric machine (130) is substantially between 25% of a nominal battery voltage and 75% of the nominal battery voltage.
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
H01R 4/62 - Connections between conductors of different materialsConnections between or with aluminium or steel-core aluminium conductors
H02K 3/14 - Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots with transposed conductors, e.g. twisted conductors
H02K 7/18 - Structural association of electric generators with mechanical driving motors, e.g.with turbines
H02K 11/00 - Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
5.
A METHOD FOR ESTIMATING STATE OF CHARGE AND STATE OF HEALTH OF A BATTERY AND A SYSTEM THEREOF
A Method for Estimating State of Charge and State of Health of Battery and a System thereof The present invention relates to a method (200) and system (100) for estimating state of charge and state of health of a battery (10). A first vector (x) and a second vector (Θ) are initialised. The first vector (x) is estimated and updated by a first state-space filter based first equivalent circuit solver by assuming a fixed value of the second vector (Θ). the second vector (Θ) is estimated and updated based on an Electrochemical Model and then by a second state-space filter based second equivalent circuit solver. The updated values of the second vector (Θ) by the Electrochemical Model and the second state-space filter based equivalent circuit solver are merged. The state of charge is obtained from the updated value of the first vector (x), and the state of the health is obtained from the merged and updated value of the second vector (Θ).
G01R 31/36 - Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
G01R 31/382 - Arrangements for monitoring battery or accumulator variables, e.g. SoC
G01R 31/3842 - Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
G01R 31/389 - Measuring internal impedance, internal conductance or related variables
G01R 31/392 - Determining battery ageing or deterioration, e.g. state of health
G01R 31/396 - Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
An Integrated Starter Generator System The present invention relates to an Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 3n stator teeth (132'), 'n' being a natural number, and each stator tooth (132') has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 4n rotor poles (134') facing the stator (132), and magnets on the rotor poles (134') are disposed with an alternating sequence of magnet polarity facing the stator (132). Herein, back-emf constant of the electric machine (130) is substantially between 25% of a nominal battery voltage and 75% of the nominal battery voltage.
H02K 21/22 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
H02K 21/00 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets
H02K 21/12 - Synchronous motors having permanent magnetsSynchronous generators having permanent magnets with stationary armatures and rotating magnets
An Integrated Starter Generator System The present invention relates to an Integrated Starter Generator system (100) comprising a battery (110) and a three-phase brushless DC electric machine (130). The electric machine (130) has a stator (132) with 6n stator teeth (132'), 'n' being a natural number, and each stator tooth (132') has a coil corresponding to one of the three phases. The electric machine (130) further has a rotor (134) with 6n ± 2 rotor poles (134') facing the stator, and magnets on the rotor poles (134') are disposed with an alternating sequence of magnet polarity facing the stator (132).
B60W 10/08 - Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
B60W 20/15 - Control strategies specially adapted for achieving a particular effect
F02B 79/00 - Running-in of internal-combustion engines
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
H02P 1/46 - Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual synchronous motor
The present invention relates to a method (200) and system (100) for controlling a rotary electric machine wherein a state of the rotary electric machine is determined between a low speed state and a high speed state. In the low speed state, a first rotor position (P1) and a first rotor speed (S1) are estimated based on intra-PWM current ripple (∆X), a mean current vector (Y) and an inductance vector. A second rotor position (P2) and second rotor speed (S2) is estimated based on average current flowing through stator phase windings. State of rotary electric machine is selected based on estimated first rotor speed (S1) and/or estimated second rotor speed (S2). At low speed state, PWM signals are updated based on estimated first rotor position (P1), and at high speed state, PWM signals are updated based on estimated second rotor position (P2).
H02P 27/08 - Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using DC to AC converters or inverters with pulse width modulation
H02P 6/18 - Circuit arrangements for detecting position without separate position detecting elements
H02P 6/00 - Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor positionElectronic commutators therefor
9.
System for controlling electrical power generated by a permanent magnet machine
A system for controlling electrical power generated by a permanent magnet machine coupled to an internal combustion engine includes a central processing unit configured to determine speed of the machine, and compare the machine speed with a predetermined range of machine speeds, a series power switching circuit connected between the machine and a battery, a bus decoupling power switch connected between a voltage bus and the battery, and a bridge switching circuit connected between the voltage bus and the machine and configured to amplify voltage generated by the machine if the machine speed is less than a predetermined value or fall within a predetermined range thereby charging the battery with amplified voltage even at lower machine speeds. The central processing unit selectively connects the bridge switching circuit with the battery by actuating the bus decoupling switch and/or the series power switching circuit depending upon the machine speed.
The invention relates to a method for cranking an internal combustion engine, including the steps of: (a) receiving a start signal; (b) determining an initial position of the rotor with respect to a stator phase winding; (c) applying a pulse-width-modulated signal to the stator winding corresponding to determined initial position of the rotor; (d) determining a threshold value of the stator current variation; (e) measuring current of the stator winding in response to applied pulse-width-modulated signal to determine current variation; (f) if current variation is more than the threshold value, determining updated rotor position, applying a pulse-width-modulated signal to the stator winding corresponding to the updated rotor position; and repeating steps (d)-(f); and (g) if current variation is less than the threshold value, applying a pulse-width-modulated signal to the stator winding corresponding to the last updated rotor position and repeating steps (d)-(g).
H02P 6/00 - Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor positionElectronic commutators therefor
A system and method for starting a three phase brushless generator having an IC engine, a main alternator (100), and excitation alternator (200), and a rectifier (400) is disclosed. The system comprises a voltage source (500) and an ECU (300). The ECU is configured to apply voltages to a field winding (210) of the excitation alternator and to phase windings (110a, 110b, 110c) of the main alternator, such that magnetic field generated by a field winding (120) of the main alternator is out of phase with respect to magnetic field resulting from the phase windings of the main alternator, whereby a torque is applied on the rotor of the main alternator causing rotation. The voltage is varied to maintain the torque and till the speed of rotor increases beyond a threshold value to start the generator.
A system and method for starting a single phase brushed generator having an IC engine coupled with an alternator (100) is disclosed. The system comprises a voltage source (300), an electronic control unit (ECU) (200). The ECU is configured to apply voltages to a field excitation winding (110), a main winding (130) and to an auxiliary winding (120) depending on an initial position of the rotor with respect to the main winding, such that magnetic field generated by the field excitation winding is out of phase with respect to magnetic field resulting from the main winding and the auxiliary winding whereby a torque is applied on the rotor causing rotation. The voltage is varied to maintain the torque and till speed of rotor increases beyond a threshold value to start the generator.
The invention relates to a method for controlling an integrated starter-generator, including receiving a start signal; determining an initial position of a rotor with respect to a stator phase winding integrated starter-generator of the integrated starter-generator; applying a pulse-width-modulated signal to the stator winding corresponding to determined initial position of the rotor; measuring current of the stator winding in response to applied pulse-width-modulated signal to determine current variation; if current variation is more than a threshold value, determining updated rotor position and applying a pulse-width-modulated signal to the stator winding corresponding to the updated rotor position; determining speed of the rotor, if speed of the rotor is more than a threshold value, monitoring a trigger signal from an ignition trigger sensor coupled to the engine; and if the trigger signal is received, determining the updated rotor position and exciting the stator winding corresponding to the updated rotor position.
H02P 6/17 - Circuit arrangements for detecting position and for generating speed information
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
F02N 11/08 - Circuits specially adapted for starting of engines
F02D 29/06 - Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
The present invention relates to a system for controlling electrical power generated by a permanent magnet machine, the permanent magnet machine coupled to an internal combustion engine, the system comprising a central processing unit configured to, determine speed of the machine, and compare the machine speed with a predetermined range of machine speeds, a series power switching circuit connected between the machine and a battery, a bus decoupling power switch connected between a voltage bus and the battery, and a bridge switching circuit connected between the voltage bus and the machine, the bridge switching circuit configured to amplify voltage generated by the machine if the machine speed is less than a predetermined value or fall within a predetermined range thereby charging the battery with amplified voltage even at lower machine speeds, wherein the central processing unit selectively connects the bridge switching circuit with the battery by actuating the bus decoupling switch and/or the series power switching circuit depending upon the machine speed.
Method and System for Cranking an Internal Combustion Engine The present invention relates to a method for cranking an internal combustion engine. The method comprising the steps of: (a) receiving a start signal; (b) determining an initial position of the rotor with respect to a stator phase winding; (c) applying a pulse-width-modulated (PWM) signal to the stator winding corresponding to determined initial position of the rotor; (d) determining a threshold value of the stator current variation; (e) measuring current of the stator winding in response to applied pulse-width-modulated signal to determine current variation; (f) if current variation is more than the threshold value: determining updated rotor position, applying a pulse-width-modulated signal to the stator winding corresponding to the updated rotor position; and repeating steps (d) - (f); and (g) if current variation is less than the threshold value: applying a pulse-width-modulated signal to the stator winding corresponding to the last updated rotor position and repeating steps (d) - (g).
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
F02D 29/06 - Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
F02N 11/00 - Starting of engines by means of electric motors
F02N 11/08 - Circuits specially adapted for starting of engines
F02N 15/02 - Gearing between starting-engines and started enginesEngagement or disengagement thereof
16.
METHOD AND SYSTEM FOR CONTROLLING AN INTEGRATED STARTER-GENERATOR
The present invention relates to a method for controlling an integrated starter-generator. The method comprising the steps of: receiving a start signal; determining an initial position of a rotor with respect to a stator phase winding integrated starter- generator of the integrated starter- generator; applying a pulse-width-modulated signal to the stator winding corresponding to determined initial position of the rotor; measuring current of the stator winding in response to applied pulse-width-modulated signal to determine current variation; if current variation is more than a threshold value, determining updated rotor position and applying a pulse-width-modulated signal to the stator winding corresponding to the updated rotor position; determining speed of the rotor, if speed of the rotor is more than a threshold value, monitoring a trigger signal from an ignition trigger sensor coupled to the engine; and if the trigger signal is received, determining the updated rotor position and exciting the stator winding corresponding to the updated rotor position.
F02N 11/04 - Starting of engines by means of electric motors the motors being associated with current generators
F02N 11/06 - Starting of engines by means of electric motors the motors being associated with current generators and with ignition apparatus
F02D 29/06 - Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
17.
STARTING SYSTEM FOR INTERNAL COMBUSTION ENGINE AND METHOD THEREOF
Based on the presence of start command and motion of crankshaft of an IC engine, a motor coupled to the crankshaft is energized or de-energized by a control unit. If the crankshaft stops moving in a forward direction or starts moving in a reverse direction the motor is de-energized allowing the crankshaft to move in reverse direction, and if crankshaft stops moving in reverse direction or starts moving in forward direction, the motor is energized causing the crankshaft to move in forward direction with an increasing kinetic energy to overcome starting resistance of the motor. Various sensor means may be implemented to detect the motion of the crankshaft.
An autonomous excitation control system for an internal combustion driven electric generator comprising: a rectifier circuitry coupled to alternator output to convert AC waveform from alternator output to a DC waveform; a zero crossing detection circuitry coupled to alternator output and generating an output pulse when the generator output crosses zero value; a sensing circuitry for sensing generator output voltage and converting said output voltage to low-power electric signals; a microprocessor receiving power from said rectifier circuit and having first input from said zero crossing detection circuitry and second input from said sensing circuitry.
A system and method of calculating ignition timing of a spark-ignited internal combustion engine that results in optimal operation of engine while ensuring suitable knock margin is provided. A base ignition timing σbase is calculated using engine operating parameters, an additional ignition timing σssc is calculated using an adaptive slope-seeking controller and a resultant ignition timing is calculated using the two calculated ignition timings. The operation of the slope-seeking controller (82) is controlled based on engine operating conditions.
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