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A bidirectional control circuit of a brushless DC motor

A brushed DC motor and control circuit technology, applied in motor control, rotation direction control, control system and other directions, can solve the problems of low reliability and high cost, and achieve the effect of high reliability, low cost and simple realization

Active Publication Date: 2019-01-04
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a bidirectional control circuit for brushless DC motors to solve the problems of high cost and low reliability of the existing bidirectional control circuits for brushless DC motors

Method used

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  • A bidirectional control circuit of a brushless DC motor
  • A bidirectional control circuit of a brushless DC motor
  • A bidirectional control circuit of a brushless DC motor

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Embodiment Construction

[0073] The preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. The accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to explain the principle of the present invention, and are not used to limit the scope of the present invention.

[0074] A specific embodiment of the present invention discloses a two-way control circuit of a brushless DC motor. The schematic diagram is as figure 1 Shown, including: forward commutation circuit (2), reverse commutation circuit (3), steering selection circuit (4), filter circuit (5), upper arm control circuit (6), lower arm control circuit (7) Power inverter main circuit (8);

[0075] The position signal of the brushless DC motor is respectively input to the input terminals of the forward commutation circuit (2) and the reverse commutation circuit (3), and the output of the forward commutation circuit (...

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Abstract

The invention relates to a bi-directional control circuit of a brushless DC motor, belonging to the technical field of the bi-directional control circuit of the motor, which solves the problems of high cost and low reliability of the existing circuit. Comprises a forward commutation circuit, an inverse commutation circuit, a steering selection circuit, a filter circuit, an upper bridge arm controlcircuit, a lower bridge arm control circuit and a power inverter main circuit; A motor position signal is input to input ends of the forward commutation circuit and the invert commutation circuit, anoutput terminal of the forward commutation circuit and An output terminal of the inverting commutation circuit are connected to an input terminal of the steering selection circuit, the steering select circuit outputs a signal H1, H3, H5 are connected to an upper bridge arm control circuit after passing the filter circuit, The output signals H2, H4 and H6 of the steering selection circuit are connected to the lower bridge arm control circuit after passing through the filter circuit, and the output signals of the upper bridge arm control circuit and the lower bridge arm control circuit are connected to the power inverter main circuit, and the output signals of the power inverter main circuit are connected to the input terminal of the motor. The miniaturization, low cost, high reliability of the brushless DC motor are achieved.

Description

Technical field [0001] The invention relates to the technical field of DC motor bidirectional control circuits, in particular to a brushless DC motor bidirectional control circuit. Background technique [0002] The invention relates to a bidirectional control circuit of a brushless DC motor. [0003] Brushless DC motors have the advantages of small size, high energy density, compact structure, high efficiency, etc., and are widely used in various fields of industrial production such as national defense, military industry, aviation, aerospace, automobiles, and home appliances. In recent years, with the rapid development of control theory, components and permanent magnet materials, the application of brushless DC motors has become more and more extensive, and the miniaturized, low-cost, and highly reliable bidirectional control circuit of brushless DC motors has become one of the research hotspots. [0004] At present, the two-way control circuit of a brushless DC motor mainly consist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/16H02P6/30
CPCH02P6/16H02P6/30H02P2207/05
Inventor 崔臣君李方俊李俊峰李浩周通蔡霖王生捷
Owner BEIJING MECHANICAL EQUIP INST