Unlock instant, AI-driven research and patent intelligence for your innovation.

Motor driving method and device, computer device and computer readable storage medium

A computer device and motor-driven technology, applied in the direction of single motor speed/torque control, etc., to increase the starting speed and improve the effect of dragging

Active Publication Date: 2019-01-18
宁波拓邦智能控制有限公司
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The embodiment of the present invention provides a motor driving method, aiming to solve the problem of rapid startup of brushless motors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Motor driving method and device, computer device and computer readable storage medium
  • Motor driving method and device, computer device and computer readable storage medium
  • Motor driving method and device, computer device and computer readable storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An embodiment of the present invention provides a motor driving method, such as figure 1 As shown, the method includes:

[0027] S101. Obtain a preset PWM duty cycle, and obtain a counter electromotive force detection time point according to the PWM duty cycle;

[0028] S102. When the detection time point of the counter electromotive force is reached, the current counter electromotive force is detected;

[0029] S103. Obtain the current position of the rotor of the motor according to the detected current counter electromotive force, and enter a closed-loop state.

[0030] Since the back electromotive force is very weak when the speed of the motor is low, the interference of the switch on and off will submerge the back electromotive force signal of the motor. time), the back electromotive force of the motor is very pure, there is no interference, and the current position of the motor can be judged completely. Therefore, in the embodiment of the present invention, when...

Embodiment 2

[0033] An embodiment of the present invention provides a motor driving method, such as figure 2 As shown, the method includes:

[0034] S201. Determine the initial position of the motor rotor;

[0035] S202. Obtain a preset PWM duty cycle, and obtain a counter electromotive force detection time point according to the PWM duty cycle;

[0036] S203. When the detection time point of the counter electromotive force is reached, the current counter electromotive force is detected;

[0037] S204. Obtain the current position of the rotor of the motor according to the detected current counter electromotive force, and enter a closed-loop state.

[0038] In the embodiment of the present invention, since the motor can be given a greater starting force when dragging for the first time, on the basis of the method in Embodiment 1, a step of determining the initial position of the motor rotor is added to make the motor enter the Closed loop state.

Embodiment 3

[0040] An embodiment of the present invention provides a motor driving method, such as image 3 As shown, step S201, determine the initial position of the motor rotor, including:

[0041] S301. Obtain the current of the sampling point of each phase of the motor;

[0042] S302. Determine the initial position of the motor rotor according to the magnitude of the current at the sampling point;

[0043] In the embodiment of the present invention, according to the 6 states of the motor, 6 groups of pulses AC, BC, BA, AB, BC, and CA are injected into each group. When the pulse is injected, a current is generated, and the currents of the sampling points of each phase of the motor are collected and compared with each other. The phase with the largest current is the starting position of the motor rotor.

[0044] Wherein, the sampling point is the position where the current of each phase is maximum.

[0045] In the embodiment of the present invention, since the motor can be given a gr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention is applicable to the technical field of motor driving, and provides a motor driving method and device, a computer device and a computer-readable storage medium. The method comprises thefollowing steps: acquiring a preset PWM duty cycle, and acquiring a detection time point of a back electromotive force according to the PWM duty cycle; detecting a current back electromotive force when a detection time point of the back electromotive force is reached; according to the detected current back electromotive force, the current position of the motor rotor is calculated according to thepreset calculation rules, and the motor rotor enters the closed-loop state. The invention obtains the preset PWM duty cycle, and obtains the detection time point of the back electromotive force according to the PWM duty cycle, thereby avoiding the defect that the back electromotive force signal of the motor is submerged by the interference of switching on and off of the switch tube; the back electromotive force signal of the motor is detected by the back electromotive force signal. When the PWM level is low, the back EMF of the motor is very pure, and there is no interference, so the current position of the motor can be judged completely, so that the motor quickly enters the closed-loop state, quickly realizes the closed-loop, and improves the starting speed of the motor.

Description

technical field [0001] The invention belongs to the technical field of motor driving, and in particular relates to a motor driving method, device, computer device and computer-readable storage medium. Background technique [0002] When the brushless motors in the prior art are started, many types of brushless motors need to be debugged for a long time, especially brushless motors with a relatively small number of pole pairs, usually need to be debugged for a long time to achieve a stable start. The counter electromotive force is weak, so the brushless motor needs to be dragged to a certain speed before starting, and then the position of the rotor of the brushless motor can be accurately detected, and then the commutation operation can be performed to start the brushless motor stably. However, the start-up time required for such a start-up method will be longer, and due to the glitch effect of the turn-on and turn-off of the MOS tube, the brushless motor often mistakenly dete...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02P6/08
CPCH02P6/08
Inventor 覃全兴殷正
Owner 宁波拓邦智能控制有限公司