DC brushless motor driver

Abstract

The invention discloses a DC brushless motor driver, which comprises a power supply circuit, an interface circuit, a single-chip microcomputer control circuit, a position sensor detection circuit, a rotor position detection circuit and an MOS transistor driving circuit, and is characterized in that the interface circuit is used for sending a control instruction to the single-chip microcomputer control circuit; the single-chip microcomputer control circuit is used for determining position information of a DC brushless motor rotor and controlling the MOS transistor driving circuit to drive a DC brushless motor to operate according to the position information; the position sensor is used for acquiring position information acquired by a position sensor of the DC brushless motor rotor when there is a position sensor signal, and sending the position information to the single-chip microcomputer control circuit; the rotor position detection circuit is used for acquiring the position information of the DC brushless motor rotor according to phase line current of the DC brushless motor when there is no sensor signal, and sending the position information to the single-chip microcomputer control circuit; and the MOS transistor driving circuit drives the motor to rotate. The motor can be driven no matter whether the motor is provided with a position sensor or not. In addition, a motor with a position sensor still can be driven to operate when the position sensor is damaged. The DC brushless motor driver can efficiently drive a DC brushless motor to operate.

Description

technical field [0001] The invention relates to the field of motor driving devices, in particular to a DC brushless motor driver. Background technique [0002] Due to its high efficiency, long life, low noise, high-speed dynamic response and other characteristics, brushless DC motors are widely used in daily life appliances, automotive industry, aviation, consumer electronics, medical electronics, industrial automation and other devices. The motor does not use the commutation brush of the mechanical structure but directly uses the electronic commutator, so the driver design of the motor is particularly important for the high performance of the motor. [0003] The existing single brushless DC motor driver can only drive a brushless DC motor with a position sensor or a brushless DC motor without a position sensor, and when the position sensor of the motor with a position sensor is damaged, it cannot continue to drive. That is, it stops working and the driving efficiency is lo...

AI Technical Summary

Problems solved by technology

[0003] The existing single brushless DC motor driver can only drive a brushless DC motor with a position sensor or a brushless DC motor without a position sensor, and when the position sensor of the motor with a position sensor is damaged, it cannot continue to drive. That is, it stops working and the driving efficiency is low

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