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Brushless direct-current motor of molding resin housing

A brushless DC motor, resin housing technology, applied in the direction of electronic commutation motor control, electrical components, electromechanical devices, etc., can solve problems such as damage to bearings and electrochemical corrosion of motors

Inactive Publication Date: 2015-10-21
重庆市小榄电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] However, molded motors are sometimes used for high-voltage and PWM-controlled operations. Due to the distribution of the various capacitive elements in the motor and the voltage change (dv / dt) from the PWM, the stator charge flows from the stator to the rotor through the bearing to form a current, thereby affecting the Motors cause galvanic corrosion and can damage bearings

Method used

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  • Brushless direct-current motor of molding resin housing
  • Brushless direct-current motor of molding resin housing

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Embodiment Construction

[0019] Reference figure 1 To illustrate a specific embodiment of the present invention, figure 1 This is a longitudinal sectional view of the molded motor 10 of this embodiment.

[0020] The molded motor 10 of the present invention is covered with an insulating resin, and the pre-mold portion 13 is applied to the cylindrical stator core 12 of laminated steel plate, which also serves as an insulating layer; then, the coil 16 is wound on the pre-mold portion 13 的projection 14 on.

[0021] The drive circuit of the molded motor 10 is installed on the control board 18, and the control board 18 is installed on one side of the stator core 12 (such as figure 1 The upper half shown). In this case, the pre-mold portion 13 is provided with a preset hole, which is convenient for the control board 18 to be fixed by plugging.

[0022] A connector 20 for transmitting signals is installed on the control board 18.

[0023] The stator coil 16 of the stator 22 is wound on the stator core 12, the co...

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Abstract

The invention discloses a brushless direct-current motor of a molding resin housing. A bearing of a molding motor is free of electrocorrosion. The brushless direct-current motor of the molding resin housing comprises a stator. A coil is wound around a stator core of the stator. The housing made of unsaturated polyester resin covers the outer layer of the motor. Molding resin has an electrical insulating property. A grounding electrode is made of metal, and the grounding electrode and the housing are connected to the stator core through a metal holder. Therefore, current passes through the stator core and the holder to reach the external, so that electrocorrosion and deterioration of the bearing are prevented.

Description

Technical field [0001] The invention relates to a molded motor, in particular to a DC brushless motor with a molded resin shell. Background technique [0002] The existing molded motor has a shell mold formed on the stator by using molded resin. In the shell, a coil is wound on the stator core and a rotor with a fixed bearing on the inner side. [0003] Regarding the above-mentioned molded motor, since the outer layer of the above-mentioned molded motor is covered with a layer of insulating molded resin, it is usually used in a lower voltage situation, so the grounding problem has not been considered too much in the past. [0004] However, molded motors are sometimes used for high-voltage and PWM control operations. Due to the distribution of capacitance elements in the motor and the voltage change (dv / dt) from the PWM, the stator charge flows from the stator to the rotor through the bearing to form a current, which is The motor causes electrochemical corrosion and may damage the be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K5/02H02K5/08H02K5/16H02K1/12H02P6/00
Inventor 沈春蓝
Owner 重庆市小榄电器有限公司
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