The invention discloses a brushless direct-current power generation system of an electric automobile range extender. The system is characterized in that an engine is connected with a rotating shaft ofa brushless direct-current motor, a three-phase full-bridge inverter converts three-phase alternating current into direct current, a direct-current bus filter capacitor filters alternating current components of the direct current, a motor phase current detection circuit detects the a-phase current and the b-phase current of the brushless direct-current motor and sends the a-phase current and theb-phase current to a digital signal processor, a direct-current bus voltage detection circuit detects direct-current bus voltage and sends the direct-current bus voltage to the digital signal processor, a Hall position sensor detects the rotor position signal of the brushless direct-current motor and sends the rotor position signal of the brushless direct-current motor to the digital signal processor DSP, and the DSP processes the a-phase current, the b-phase current, the direct-current bus voltage and the rotor position signal, sends out the pulse width modulation (PWM) signal of the three-phase full-bridge inverter, and controls the on-off of a power switch of the three-phase full-bridge converter according to the PWM signal.
本发明公开了一种电动汽车增程器无刷直流发电系统,其中发动机连接无刷直流电机的转轴,三相全桥逆变器将三相交流电变换为直流电,直流母线滤波电容滤除直流电的交流成分;电机相电流检测电路检测无刷直流电机的a相电流和b相电流,将a相电流和b相电流送入数字信号处理器;直流母线电压检测电路检测直流母线电压,将直流母线电压送入数字信号处理器;霍尔位置传感器检测无刷直流电机的转子位置信号,将无刷直流电机的转子位置信号送入数字信号处理器DSP;数字信号处理器DSP处理a相电流、b相电流、直流母线电压和转子位置信号,发出三相全桥逆变器的脉宽调制PWM信号,依据脉宽调制PWM信号控制三相全桥变换器功率开关的通断。
Brushless direct-current power generation system of electric automobile range extender
电动汽车增程器无刷直流发电系统
2021-04-02
Patent
Electronic Resource
Chinese
IPC: | H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
Range extender of electric automobile and control method of range extender
European Patent Office | 2023
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