A motor control unit

Abstract

The invention provides a motor control unit which is simple and low in cost. The inner space and the outer space of a control panel provided with the motor control unit can be effectively utilized. The motor control unit comprises a box body in the shape of a cuboid. The box body comprises a base plate part, and a left side plate part, a right side plate part, a top plate part and a bottom plate part which are substantially perpendicular to the surfaces of the base plate part and connected to the left side, the right side, the upper side and the lower side of the base plate part. The box body has an open part as the open surface. The box body is arranged on the control panel which is dimensioned to containing the box body. The box body comprises a semiconductor element for power supply to control target devices, and a heat dissipation part (heat dissipation fins or a fan) for dissipating heat of the heating semiconductor element. When the motor control unit is installed on the control panel, the heat dissipation part is arranged on the plate side of the control panel.

Description

technical field [0001] The invention relates to the structure of a motor control unit. Background technique [0002] A motor control unit that controls a motor or the like has a housing including a main circuit board and a control circuit board. On the above-mentioned main circuit board are mounted large-scale components that generate large amounts of heat, such as semiconductor elements constituting converters and inverters, and electrolytic capacitors. In addition, circuit components for controlling the inverter, such as a CPU and an IC, are mounted on the control circuit board. [0003] The case of the motor control unit includes a metal plate that supports the main circuit board and the control circuit board. In addition, ECUs usually include heat sinks and cooling fans. The heat sink and the cooling fan cool circuit components such as semiconductor elements constituting a converter mounted on a substrate, semiconductor elements constituting an inverter mounted on a s...

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to use the space efficiently due to the use of space inside and outside the control panel

In addition, due to the high price of the heating plate itself, the cost increases

[0007] In addition, in the technical solution disclosed in Japanese Patent Laid-Open Publication No. Hei 5-260763, since a plurality of metal plates are used, the cost of the metal plate increases

In addition, in the technical solution disclosed in Japanese Patent Laid-Open Publication No. Hei 6-284522, the structure of the control panel for natural cooling is complicated

Additionally, motor controls mounted on the back of the control panel use a larger amount of space on the back of the control panel

Therefore, it is difficult to effectively use the space in the control panel

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