A bidirectional control circuit for brushless DC motor
A brushed DC motor and control circuit technology, applied in motor control, rotation direction control, control system, etc., can solve the problems of high cost and low reliability, and achieve low cost, high reliability and simple effect
Active Publication Date: 2020-08-21
BEIJING MECHANICAL EQUIP INST
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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
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[0073] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.
[0074] A specific embodiment of the present invention discloses a bidirectional control circuit for a brushless DC motor, the schematic diagram of which is shown in figure 1 As shown, it includes: forward commutation circuit (2), reverse commutation circuit (3), steering selection circuit (4), filter circuit (5), upper bridge arm control circuit (6), lower bridge arm control circuit (7), power inverter main circuit (8);
[0075] The position signals of the brushless DC motor are respectively input to the input ends of the forward commutation circuit (2) and the reverse commutation circuit (3)...
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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 bidirectional control circuits for DC motors, in particular to a bidirectional control circuit for brushless DC motors. 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, and high efficiency, 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 bidirectional control circuit of brushless DC motors with miniaturization, low cost and high reliability has become one of the research hotspots. [0004] At present, the bidirectional control circuit of the ...
Claims
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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