A vehicle-mounted DC auxiliary power supply for an extended-range electric vehicle
An electric vehicle and auxiliary power supply technology, applied in electric vehicle charging technology, electric vehicles, motor vehicles, etc., can solve the problems of inability to meet the requirements of DC power generation and active dynamic control, unsuitable fuel efficiency and emission level, etc. The effect of charging the car, extending the comprehensive driving range, and improving the passenger comfort
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Embodiment 1
[0034] Embodiment 1: A vehicle-mounted DC auxiliary power supply for an extended-range electric vehicle, including an engine 9, an engine controller 10, a radiator 11, a muffler 12, an air filter 13, a system controller 14, and a generator 15.
[0035] The system controller 14 includes a power generation and system control unit 3, a power generation drive unit 7, and a remote communication and GPS module 8;
[0036] The system controller 14 is directly connected to the doubly salient generator 15, and is connected to the engine controller 10 and the vehicle controller 6 through two CAN buses respectively, so as to adjust the output power of the doubly salient generator 15 , the output can directly charge the power battery 5 or directly output the DC current and DC voltage to the motor controller 4, and automatically identify the vehicle speed and vehicle power consumption rate of the electric vehicle, determine different power generation control modes, and optimize the power ge...
Embodiment 2
[0039] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the doubly salient pole generator 15 receives the excitation control from the generating drive unit 7, and its generating output is directly connected to the DC power bus, and through the DC power The bus is connected to the power end of the power battery 5 and the motor controller 4 at the same time, and feeds the generated current and DC voltage back to the power generation and system control unit 3 .
[0040] In this embodiment, the three-phase high-frequency power output of the doubly salient generator 15 is rectified and directly outputs a DC current, and the power generation voltage is determined by the power battery 5 .
[0041] In this embodiment, a coupling is used to flexibly connect the engine and the generator to reduce vibration transmission.
Embodiment 3
[0042] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the engine 9 described in this embodiment is directly connected to the engine controller 10, and its 12V power supply comes from the electric vehicle before the switch control of the power generation and system control unit 3 12V constant power supply, when the temperature of the engine 9 is high and enters the shutdown operation, the power generation and system control unit 3 can delay cutting off the power supply of the engine controller 10, so that the engine 9 can continue to run at an idle speed until the temperature drops to the set range .
[0043] The engine 9 described in this embodiment performs automatic speed conversion and stable control through the electronic damper according to the speed command from the CAN bus communication, and simultaneously publishes engine temperature, speed, fuel consumption rate and error codes through the CAN bus communication.
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