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Motor driving circuit and method

A motor drive and motor technology, applied in the field of motor starting devices, can solve problems such as voltage disturbance, wrong commutation point, and inability to start the motor correctly, and achieve the effect of saving manufacturing costs

Pending Publication Date: 2022-03-18
ANPEC ELECTRONICS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when detecting the zero point of the back EMF, the voltage disturbance will be caused by the noise, which will cause the wrong detection of the position of the zero point of the back EMF, which will lead to the wrong commutation point and the failure to start or drive the motor correctly

Method used

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  • Motor driving circuit and method

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Embodiment Construction

[0024]The implementation of the "motor driving circuit and method" disclosed in the present invention is described below through specific specific examples. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple illustration, and are not drawn according to the actual size, which is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention. In addition, the term "or...

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Abstract

The invention discloses a motor driving circuit and method. The motor driving circuit is used for driving a motor and comprises a starting unit, a driving unit, a floating phase selection unit, a hysteresis comparator, an integrating circuit, a first comparator and a control circuit. The control circuit controls the floating phase selection unit to select the floating phase of the motor to output a floating phase voltage signal, responds to the initial starting signal, controls the integral circuit to take the first integral time as the integral time, and judges whether the motor is successfully started or not. In response to successful starting of the motor, the control circuit controls the integrating circuit to take the second integrating time as the integrating time and controls the starting unit to switch to the operation mode so as to output an operation signal to control the driving unit to drive the motor. Wherein the first integration time is longer than the second integration time.

Description

technical field [0001] The invention relates to a motor driving circuit and method, in particular to a motor starting device and method capable of reducing noise interference. Background technique [0002] A direct current brushless motor is a common motor, which has the advantages of high efficiency, lightness, thinness, shortness, and smallness, and thus is widely used in various fields. In today's electronic products, such as personal computers, notebook computers, communication devices and household appliances, etc., brushless DC motors are used. For example, the fan motors of various electronic products and the spindle motors of computer storage devices all use DC brushless motors. Brush the motor. Generally speaking, when driving a brushless DC motor, it is necessary to detect the position of the motor rotor to correctly drive the commutation switch to carry out the commutation procedure. [0003] Existing brushless DC motor systems usually include a three-phase brus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/20H02P6/17H02P6/182
CPCH02P6/20H02P6/17H02P6/182H02P1/46H02P23/14H02P25/03
Inventor 陈昆民刘宜政
Owner ANPEC ELECTRONICS CORPORATION