Electric Vehicles and Motor Controllers for Electric Vehicles

Abstract

The present invention proposes an electric vehicle and a motor controller for the electric vehicle, wherein the motor controller includes: a first charging port and a second charging port, the first charging port is connected to one end of the power battery of the electric vehicle, and the second The second charging port is connected to the other end of the power battery; the first drive port and the second drive port; a bidirectional DC / AC module; a motor control switch; a charge and discharge control module; The discharge control module is connected; the controller module is used to control the motor control switch and the charge and discharge control module according to the current working mode of the motor controller. The motor controller separates the negative pole of the DC charging port on the power battery side from the negative pole of the driving DC bus, so that when the motor controller is in the charging mode, that is, when the motor controller is connected to the AC 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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