Motor starting and speed-regulation control circuit and driving control method thereof

A motor starting and control circuit technology, applied in the direction of electronic commutator, starting device, etc., can solve the problems of complex process and high cost, and achieve the effect of low cost, simple and reliable structure, and extended use range.

Active Publication Date: 2017-05-31
深圳市斗索科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiment of the present invention is to provide a motor starting and speed regulation control circuit, aiming at solving the problem of starting the three-phase permanent magnet synchronous motor in the existing way, The problem of complex process and high cost

Method used

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  • Motor starting and speed-regulation control circuit and driving control method thereof
  • Motor starting and speed-regulation control circuit and driving control method thereof
  • Motor starting and speed-regulation control circuit and driving control method thereof

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0028] In the embodiment of the present invention, the touch signal controls each bidirectional thyristor to perform bidirectional conduction under the single-phase fixed-frequency AC power supply, and the single-phase fixed-frequency AC power supply is changed to three-phase during the selective conduction process through the bidirectional thyristor. The frequency-variable alternating current a...

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Abstract

The invention is suitable for the field of power electronics and electronic control and provides a motor variable-frequency starting and speed-regulation control circuit and a driving control method thereof. The circuit comprises a variable-frequency control unit for generating a triggering signal; a bidirectional switch unit used for controlling bidirectional gating according to the triggering signal to enable a single-phase power frequency AC power supply to be converted into a three-phase variable-frequency AC power supply and form a variable-speed motor rotating magnetic field to control motor starting and speed regulation; and a protection unit used for detecting motor current and controlling the motor current through pulse-width modulation chopping wave. The triggering signal controls each bidirectional silicon controlled rectifier to realize bidirectional conduction under the single-phase power frequency AC power supply, and the three-phase variable-frequency AC power and the variable-speed motor rotating magnetic field are generated in the selective conduction process through the bidirectional silicon controlled rectifier, thereby realizing motor starting and speed regulation. The motor starting and speed-regulation control circuit is simple and reliable in structure and low in cost, and expands use range of a three-phase permanent-magnet asynchronous motor.

Description

technical field [0001] The invention belongs to the field of motors, and in particular relates to a motor starting and speed regulation control circuit and a driving control method thereof. Background technique [0002] At present, the three-phase permanent magnet synchronous motor is more and more widely used in people's production and life because of its simple structure, firmness, high efficiency and stable speed. Among them, the three-phase permanent magnet synchronous motor and BLDC (Brushless Direct Current Motor, brushless DC The combination of motor) and driver has the advantages of small size, light weight, high efficiency, adjustable speed, simple structure, reliable operation, and convenient maintenance. It can adapt to the small and light weight of the motor, high output power, and use under DC power supply. Therefore, it is increasingly used in household appliances, electric tools, medical equipment and light industrial equipment. [0003] However, the three-ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/22H02P6/17
CPCH02P6/22
Inventor 李忠祥
Owner 深圳市斗索科技有限公司
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