Electric automobile driving system and related method and device

Abstract

The invention discloses an electric automobile driving system, which is characterized by comprising a battery, a conversion module, a doubly-fed motor and a control module; when a rotor of the doubly-fed motor is connected with a power grid, the control module is used for controlling the doubly-fed motor to obtain alternating current of the power grid from the power grid, so that the doubly-fed motor can carry out voltage reduction processing on the alternating current of the power grid to obtain voltage reduction alternating current; the conversion module is used for converting the voltage reduction alternating current into direct current and transmitting the direct current to the battery, so as to charge the battery. The voltage transformation processing of the alternating current of thepower grid is achieved through the doubly-fed motor, then the voltage reduction alternating current is converted into the direct current through the conversion module, so as to charge the battery. Namely, the function of a charging pile in the prior art is achieved through the doubly-fed motor and the conversion module, so that an electric automobile can be separated from the charging pile to charge the battery, and the applicability and the charging convenience of the electric automobile are improved. The invention also discloses a control method of the electric automobile driving system anda vehicle, which has the above beneficial effects.

Description

technical field [0001] The present application relates to the technical field of electric vehicles, in particular to an electric vehicle driving system, a control method and a vehicle. Background technique [0002] With the continuous development of electric vehicle technology, a variety of electric vehicle technologies have emerged. However, due to the limitation of the battery energy storage capacity of the electric vehicle, the battery life is short, and it is necessary to charge the electric vehicle through a charging pile during driving. The prior art provides a circuit structure for charging charging piles. Specifically, when charging, the charging pile converts the three-phase power of the power grid into direct current to charge the battery. Correspondingly, the DC power of the power grid is It is converted into alternating current through a three-phase PWM converter to drive a three-phase motor. [0003] However, charging in the prior art must rely on charging pil...

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Problems solved by technology

[0003] However, charging in the prior art must rely on charging piles for charging, but the current popularization density of charging piles is far from meeting the requirements, and users may only find available charging piles for charging after driving a certain distance, making current electric vehicles The charging link is very inconvenient, resulting in the slow development of electric vehicles

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