Motor controller for electric automobile

Abstract

The invention discloses a motor controller for an electric automobile. The motor controller comprises a main casing, a water nozzle assembly, a driving module assembly, a control panel, a direct current bus, an alternating current bus and an upper casing, wherein the water nozzle assembly is arranged at the outer side of the main casing; the driving module assembly is arranged at lower part inside the main casing; the control panel is arranged at the upper part inside the main casing; the direct current bus and the alternating current bus are electrically connected with the driving module assembly; the upper casing is arranged on the main casing; a cooling water channel communicated with the water nozzle assembly is processed at the bottom of the main casing; the bottom of the cooling water channel is reliably sealed through a sealing plate and a sealing gasket; an electromagnetic separation board for preventing electromagnetic interference is arranged between the driving module assembly and the control panel; the control panel is arranged on the electromagnetic separation board; and the electromagnetic separation board is arranged on a strut cast on the inner wall of the main casing. The invention has the advantages of favorable heat radiating performance, high sealing property and favorable electromagnetic compatibility.

Description

technical field [0001] The invention belongs to the field of electric vehicle motor control, in particular to an electric vehicle motor controller. Background technique [0002] In an electric vehicle, the motor controller is a key component that realizes the DC power supply of the battery and the AC power conversion of the motor, and realizes 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] There are many types of existing motor controllers, but the layout and structure are similar. There are some problems in reliability and durability verification, such as poor heat dissipation of the drive module, which affects the life of IGBT (Insulated Gate Bipolar Transistor, Insulated Gate Bipolar Transistor). And the overall efficiency of the system; the overall sealing of the controller is not in place, and there is more or less water leakage under harsh environment...

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Problems solved by technology

[0003] There are many types of existing motor controllers, but the layout structure is similar, and there are some problems in reliability and durability verification, such as poor heat dissipation of the drive module, which affects the life of IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and the overall efficiency of the system; the overall seal of the controller is not in place, and there may be more or less water leakage after working in a harsh environment for a long time; the control board and the drive board are not well isolated, and the electromagnetic compatibility is poor

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