Commercial vehicle high-power-density motor controller

Abstract

The invention relates to a commercial vehicle high-power-density motor controller. The motor controller comprises a box body, a silicon carbide power module, radiators, a PCBA board and a thin film capacitor are arranged in the box body, and the silicon carbide power module is clamped and fixed among a plurality of radiators of a sheet structure; and the signal output end of the silicon carbide power module is connected with the PCBA board, the positive input end and the negative input end of the silicon carbide power module are connected with the positive output end and the negative output end of the thin-film capacitor respectively, and the three-phase output end of the silicon carbide power module is connected with the first three-phase output polar plate. The first three-phase output pole plate is connected with the second three-phase output pole plate, the positive input end and the negative input end of the thin-film capacitor are connected with the positive pole plate and the negative pole plate assembly respectively, and the input end of the positive pole plate and the input end of the negative pole plate assembly are electrically connected with a whole vehicle end. Compared with the prior art, the invention has the advantages of high power, high voltage, low electromagnetic interference, high integration level, small volume and the like.

Description

technical field [0001] The invention relates to a motor controller, in particular to a motor controller with high power density for commercial vehicles. Background technique [0002] With the continuous development of the new energy vehicle industry, electric vehicles have become more and more popular. The drive of electric vehicles requires a special motor controller to drive the motor to provide the required torque and speed. The output capability of the motor controller determines the overall The performance and power output of an electric vehicle, the specific structure of the traditional motor controller is to use a package module to fix on the bottom of the box, the input terminal of the package module and the output terminal of the film capacitor are fixed with bolts, and the input terminal of the film capacitor is connected to the control panel. The positive and negative plug-ins of the device are locked and fixed by bolts, and the three-phase output terminals of the...

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Problems solved by technology

Moreover, usually the withstand voltage of this package module itself is relatively low, and the actual use can only reach a maximum voltage of 420V. The film capacitor of the motor controller is arranged horizontally with the IGBT and the driver board, resulting in low space utilization and cannot maximize If the volume of the film capacitor is greatly increased, the capacitance cannot be increased to the maximum, and the controller cannot withstand high voltage

However, the current carrying capacity of the packaged module itself is limited, and the power output capability of the packaged module is greatly limited, and higher power cannot be output within the same volume.

However, the traditional commercial vehicle motor controller requires a large power output to ensure that it can drag the commercial vehicle electric bus. Therefore, the traditional motor controller cannot output such a large power with one controller, so it can only use dual controllers. Meet the requirements, which not only increases the cost, but also makes the motor controller too large, thus affecting the improvement of the power density of the motor controller

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