Electric automobile and motor controller therefor

Abstract

The invention provides an electric automobile and a motor controller therefor. The motor controller comprises a first charging port and a second charging port, wherein the first charging port is connected with one end of a power battery of the electric automobile, and the second charging port is connected with the other end of the power battery; a first driving port and a second driving port; a bidirectional DC / AC module; a motor control switch; a charging and discharging control module; a controller module which is connected with the motor control switch and the charging and discharging control module, and the controller module is used for controlling the motor control switch and the charging and discharging control module according to the current working mode of the motor controller. According to the motor controller, the negative electrode of the power battery side direct-current charging port and the negative electrode of the driving direct-current bus are separately arranged, so that when the motor controller is in a charging mode, namely the motor controller is connected into an alternating-current power grid to charge the power battery, the coupling interference is small.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a motor controller for electric vehicles and an electric vehicle. Background technique [0002] In recent years, with the rising oil price and the increasingly serious environmental pollution caused by the use of fossil fuels, electric vehicles with the advantages of zero emission, zero fuel consumption, and high efficiency have attracted more and more attention internationally. [0003] Compared with traditional fuel vehicles, electric vehicles (such as electric buses) use motor electronic control systems to replace internal combustion engines, but the electromagnetic environment of electric vehicle EMC (Electromagnetic Compatibility, electromagnetic compatibility) is very complex, and the high-voltage components and wiring influence each other Larger, the motor controller is the core component of the electric vehicle, the internal high-power IGBT (Insulated Gate Bipol...

AI Technical Summary

Problems solved by technology

[0008] 1) The DC charging port of the motor controller and the positive and negative poles of the drive share the same negative pole, which makes it difficult for the motor controller to separate the AC and DC in terms of structural layout, and the AC charging coupling interferes greatly;

[0009] 2) There is no filter circuit on the AC side of the motor controller power grid, the coupling interference is serious, and the conduction interference and radiation interference caused by the high-voltage power line are very large

[0010] 3) The ripple current on the power battery side of the DC charging port of the motor controller is relatively large, resulting in serious external common-mode interference;

[0011] 4) After the external structure of the motor controller product is finalized, if the performance is guaranteed through external rectification, the rectification is more difficult, the investment in manpower, material resources and funds is relatively large, and the testing equipment is less, so it is difficult to coordinate resources for long-term rectification

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