Controller shell

Abstract

The invention discloses a controller shell. The controller shell comprises a shell body, a connector opening, a U-shaped tube groove, an MOS tube expansion fixing device, an electrolytic capacitor tank and a circuit board assembly groove; the shell body is provided with the connector opening and the circuit board assembly groove; the circuit board assembly groove is internally provided with the U-shaped tube groove and the electrolytic capacitor tank; and the MOS tube expansion fixing device is connected with the U-shaped tube groove. By adopting the above mentioned manner, the controller shell provided by the invention can shorten the distance of connecting a high-end MOS tube input pin to a power supply and connecting a low-end MOS tube input pin to a sampling resistor by half, decrease the circuit distributed inductance, and reduce the adverse effect on the operation of a high frequency circuit.

Description

technical field [0001] The invention relates to the field of mechanical equipment, in particular to a controller casing. Background technique [0002] With the development of the economy, the city becomes larger, the road traffic improves, electric bicycles and cars have replaced bicycles, the controller is one of the core components of electric bicycles and cars, and the MOS tube is the most important part of the controller. [0003] Many electric vehicles can be heard very loud on the road, which is caused by the current imbalance of the three phases. The MOS tube is a voltage-controlled type, and a relative current-controlled type. Under the same signal, the length and thickness of the input line and output line are also the same. It will affect the current, which is much larger than the current control type. [0004] The brushless controller has A phase, B phase, and C phase connected to the motor, three sets of the same drive circuit, each phase has 1 high-end (or N pa...

AI Technical Summary

Problems solved by technology

[0005] However, in high temperature weather, the failure of the brushless controller rises rapidly, the MOS tube and the power filter electrolytic capacitor are easy to burn out, and the MOS tube needs to be fixed on the casing to dissipate heat. Most of them are stretched aluminum shells with rectangular openings, and the MOS tubes are indirectly fixed through long aluminum plates (often called bridge aluminum plates). When using aluminum as a bridge aluminum plate, there are many adverse effects, including: because aluminum is sticky, Kerosene needs to be applied frequently on the tap, and rotten teeth are prone to appear in the tapping on the bridge aluminum plate, and the bridge aluminum plate is easy to deform and generate burrs during processing, stacking, and transportation; because the thickness of the bridge aluminum plate (about 5MM) limits the depth of the thread, the Do not tighten too tightly, the bridge aluminum plate and the aluminum shell will affect the heat conduction of the MOS tube; in addition, the wires of the bridge aluminum plate are easily damaged during secondary or multiple disassembly and repair; the connecting line between the MOS tubes becomes longer; the line Except for the MOS tube, the heat generated by other devices on the board is indirectly conducted to the aluminum shell for heat dissipation through the air in the shell. Among them, the power filter electrolytic capacitor generates relatively large heat, and the electric car is easy to blow up when it is full-loaded for a long time in high-temperature weather.

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