Single-phase sensorless brushless DC motor control system

A technology for single-phase brushless motors and brushed DC motors, which is applied to single-phase motor control, control systems, electronic commutation motor control, etc., and can solve the problem of rotors that cannot be applied to single-phase brushless motors Position detection and control, restrictions on the promotion and use of single-phase brushless motors, etc.

Inactive Publication Date: 2016-10-12
SHENZHEN GAOKERUN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the structure of the single-phase brushless DC motor cannot have idle phase lines like the three-phase brushless DC motor, so that the traditional method of detecting the rotor position by back EMF cannot be applied to sin

Method used

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  • Single-phase sensorless brushless DC motor control system
  • Single-phase sensorless brushless DC motor control system
  • Single-phase sensorless brushless DC motor control system

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention more clear, 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.

[0033] see figure 1 to figure 7 , the present invention is a single-phase sensorless brushless DC motor control system, which is compatible with a single-phase brushless motor M phase connection, including: separately with the single-phase brushless motor M two-phase line A 、 B connected H bridge control circuit, the H The bridge control circuit features four MOS Tube Q1 、 Q2 、 Q3 、 Q4 , and four MOS Tube Q1 、 Q2 、 Q3 、 Q4 respectively set in the H On the input and output terminals on both sides of the bridge control circuit; the H The inp...

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Abstract

The invention relates to the technical field of motor control, and particularly relates to a single-phase sensorless brushless DC motor control system, which comprises an H-bridge control circuit respectively connected with two phases of wires of the motor. The output end of the H-bridge control circuit is connected with a current sensor; the current sensor is connected with a main controller; the main controller is provided with a first driving circuit and a second driving circuit for driving the H-bridge control circuit respectively; both the two phases of wires of the motor are connected with a counter electromotive force sampling circuit; the counter electromotive force sampling circuit is used for acquiring counter electromotive force comparison signals on the single-phase brushless motor and transmitting the counter electromotive force comparison signals to the main controller; and the main controller controls opening and closing state of the first driving circuit and the second driving circuit. The single-phase sensorless brushless DC motor control system can be well applied to a single-phase brushless motor, the rotor position of the single-phase brushless motor can be accurately detected and controlled, and a good basis is built for promotion and use of the single-phase brushless motor.

Description

technical field [0001] The invention relates to the technical field of motor control, in particular to a single-phase sensorless brushless DC motor control system. Background technique [0002] Single-phase DC brushless motors are receiving more and more attention because of their ultra-high speed and lower cost than three-phase DC brushless motors. A single-phase brushless DC motor generally consists of a permanent magnet rotor, stator windings, and a position sensor, as shown in Figure 1. The rotor of the motor shown in Figure 1 is composed of two pairs of magnetic poles 1N, 1S, 2N, and 2S, and the corresponding windings are composed of four stator windings A, B, C, and D, where A and D, B and C are the same phase windings, That is, A and D generate the same magnetic field when electrified, and B and C generate another magnetic field. Position sensors are generally composed of Hall devices. [0003] Due to the existence of the position sensor, the operation of the motor...

Claims

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Application Information

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IPC IPC(8): H02P6/26H02P6/182
CPCH02P6/182
Inventor 吴正华龚宇刘磊章朋
Owner SHENZHEN GAOKERUN ELECTRONICS CO LTD
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