Electric car motor controller

Abstract

The invention relates to an electric car motor controller. The controller comprises a direct current bus capacitor, an IGBT module, a metal support, a driving board, a current sensor, an AC busbar, a DC busbar assembly and a Y capacitor which are arranged in a main box body. An upper box body is also included. An internal portion of the upper box body is provided with a wire connection seat assembly, a shielding board, a control board, a cathode change over busbar, an anode change over busbar, an air conditioning connector, a microswitch, an air conditioning insurance and a direct-current high-voltage interlock connector. A direct current connector, an alternating current connector, an air conditioning connector, a low voltage connector, a control board cover and a junction box cover are fixed to an external portion of the upper box body. When the motor controller provided in the invention works, an IGBT and the direct current bus capacitor are vertically placed so that the controller can flexibly adapt to whole car arrangement. And simultaneously the controller possesses advantages that the structure is compact; power density is high; a heat dissipation effect is good; electromagnetic compatibility is good; operation safety is high and so on.

Description

technical field [0001] The invention relates to the field of motor controllers, in particular to an electric vehicle motor controller. Background technique [0002] The motor controller is the key component to realize the DC power supply of the battery, the AC power conversion of the motor, and the driving operation of the motor. It belongs to the core power component of the electric vehicle, and it must be able to operate continuously and reliably. [0003] The motor controllers in the prior art are mainly characterized by large volume, poor integration, poor heat dissipation and poor electromagnetic compatibility. At the same time, because most electric vehicles are developed on the same platform as traditional vehicles, the design of hybrid vehicles needs to add an electric drive system on the basis of traditional vehicles, resulting in tight space for traditional cabin layout, and more restrictions on the layout of motor controllers and wiring methods. , put forward hig...

AI Technical Summary

Problems solved by technology

However, its capacitor is arranged above the IGBT, and its vibration resistance is poor. At the same time, the capacitor type is an electrolytic capacitor, and its performance has lagged behind the current popular film capacitors; the input of the DC busbar assembly and the output of the AC busbar are realized through additional junction boxes. , resulting in an increase in the volume of the controller; the controller also does not consider the power supply of the air-conditioning compressor and the high-voltage interlock switch for safety protection; in addition, due to the large size of the controller, it is generally only suitable for pure electric buses or hybrid buses

[0006] Therefore, there is an urgent need for a motor controller suitable for electric vehicles, especially electric cars, to solve potential risks such as low integration of motor controllers in the prior art and lack of high-voltage interlock switches.

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