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Device for protecting temperature of brushless DC motor

A technology for DC motors and protection devices, which is applied in the direction of emergency protection circuit devices, electromechanical devices, electrical components, etc., can solve the problem that the drive circuit 50 is not protected, and achieve the effect of easy replacement and good stability

Inactive Publication Date: 2014-08-06
PANASONIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the control loop does not disconnect the drive loop 50 from the power supply, that is to say the drive loop 50 is not protected.

Method used

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  • Device for protecting temperature of brushless DC motor
  • Device for protecting temperature of brushless DC motor
  • Device for protecting temperature of brushless DC motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Such as image 3 Shown is a schematic diagram of the first embodiment of the present invention. The brushless DC motor 10 includes a motor winding 14 and a drive circuit 50 that inputs current to the motor winding 14 . The entire brushless DC motor 10 is covered with resin material, that is, the drive circuit 50 of the brushless DC motor 10 is plastic-sealed in the shell of the brushless DC motor 10 . Because the heights of the components on the drive circuit 50 are different, if the drive IC, FET, resistors and other components integrated with the drive control circuit are arranged on the substrate, the height will be lower. First, the parts such as the driving IC, FET, and resistor are low in height, so the concave portion 42 is formed, and the convex portion 41 is formed in other positions. In the present invention, the thermal fuse protector 100 is placed in the concave portion 42 of the lowest forming height, so that the thermal fuse protector 100 can be closer t...

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PUM

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Abstract

The invention provides a temperature protection device for a brushless DC motor, in which a thermal fuse type protector is arranged at the concave part formed on the casing of the brushless DC motor sealed in plastic. Therefore, it is convenient to set a fuse-type protector at the highest temperature place on the plastic-encapsulated shell, and it is also easy to replace if the temperature exceeds the fuse.

Description

technical field [0001] The invention relates to a brushless direct current motor, in particular to a temperature protection device for a brushless direct current motor. Background technique [0002] In the known technology brushless DC motor, such as figure 1 As shown, a base plate 30 with a circuit board is arranged beside the stator 20 of the motor 10, and its function is to drive the motor to run by rotating the rotor. The above-mentioned substrate and the stator of the motor are integrally molded. In addition, although there are many situations where a protector is used as a temperature protection device that causes a temperature rise when an abnormality occurs in the motor, because the temperature it protects is lower than 120°C, the temperature protector inside the plastic package cannot be set as a fuse type. Can only be set to automatically recoverable. [0003] Such as figure 2 As shown, the traditional thermal fuse 100 is buried between the coils of the motor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/00H02H7/08
CPCH02K11/0047H02K11/25
Inventor 杨德聪饶泽伟周汉忠曾正南史树锋田谷人志
Owner PANASONIC CORP