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Three-phase DC brushless motor control system

A brushless DC and motor control technology, applied in the field of motor systems, can solve problems such as instability, damage to DC motors, and poor characteristics of DC motors

Inactive Publication Date: 2018-11-23
ULTRA CHIP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, in the prior art, when the motor is locked in one phase, its control device will still force the DC motor to rotate to the next phase, causing damage to the DC motor
Furthermore, the current of the existing DC motor is too large or not stable at the moment of starting, resulting in poor characteristics of the DC motor

Method used

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  • Three-phase DC brushless motor control system
  • Three-phase DC brushless motor control system
  • Three-phase DC brushless motor control system

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Embodiment Construction

[0026] refer to figure 1 , which shows a block diagram of a three-phase brushless DC motor control system in an embodiment of the present invention. The three-phase brushless DC motor control system includes a brushless DC motor 100 , a driving circuit 101 , a control unit 102 , a starting device 104 , an overcurrent protection circuit 106 , a phase maintaining device 108 and an angle compensation device 110 . The driving circuit 101 is electrically connected to the brushless DC motor 100, the starting device 104 is electrically connected to the control unit 102, the overcurrent protection circuit 106 is electrically connected to the driving circuit 101 and the control unit 102, and the phase holding device 108 The brushless DC motor 100 and the control unit 102 are electrically connected. The present invention is also applicable to a brushless DC motor control system with more phases.

[0027] Such as figure 1 As shown, the driving circuit 101 is used to output a driving c...

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Abstract

The invention provides a three-phase DC brushless motor control system. The three-phase DC brushless motor control system comprises a DC brushless motor, a driving circuit, a control unit, a startingdevice, an overcurrent protection circuit and a phase maintaining device, wherein the overcurrent protection circuit is used for deciding whether the DC brushless motor is closed or not according to the size of a driving current of the DC brushless motor, and the phase maintaining device is used for deciding whether a rotor is maintained at a current phase or not according to a position state of the rotor of the DC brushless motor.

Description

【Technical field】 [0001] The invention relates to a motor system, in particular to a three-phase DC brushless motor control system. 【Background technique】 [0002] Due to its good stability and the characteristic of forming a linear relationship between the input and output of the motor, the DC motor has better control performance. Therefore, it is widely used in places that require high-precision control. However, the existing DC motors have the following deficiencies: the brushes of the rectifier device and the commutator are in mechanical contact, which are prone to wear and sparks due to friction, resulting in reduced reliability of the motor and the time spent replacing the brushes. shortcoming. Therefore, the brushless motor replaces the rectification part (brush and commutator) of the existing DC motor electronically, and retains the characteristic of DC motor that can perform acceleration control, so it is a DC motor with better characteristics. [0003] However, w...

Claims

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Application Information

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IPC IPC(8): H02P6/00H02P6/08H02P6/20H02P6/30H02H7/085
CPCH02H7/085H02P6/00H02P6/08H02P6/20H02P6/30
Inventor 蔡清海周顺钦陈易腾
Owner ULTRA CHIP INC
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