Control method of brushless DC motor, computer device and readable storage medium

The technology of a brushed DC motor and a control method is applied in the fields of computer devices, control of brushless DC motors, and computer-readable storage media. Reduce the probability of overcurrent protection, avoid sudden increase in motor phase current, and eliminate noise

Active Publication Date: 2021-01-15
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing control technology for externally driving the brushless DC motor of the air conditioner, when the current target speed of the motor is much higher than the maximum speed at which the current bus voltage can maintain operation, such as when the bus voltage suddenly rises sharply, the motor speed will suddenly increase to The target speed causes a sudden increase of the phase current, accompanied by obvious whirring noise, which seriously affects the user experience
Moreover, when the bus voltage drops sharply, the motor speed is not corrected in time, resulting in out-of-step phenomenon

Method used

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  • Control method of brushless DC motor, computer device and readable storage medium
  • Control method of brushless DC motor, computer device and readable storage medium
  • Control method of brushless DC motor, computer device and readable storage medium

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Embodiment Construction

[0030] The control method of the brushless DC motor of the present invention is a computer program applied to equipment provided with a motor control circuit, for example, applied to an air conditioner, a refrigerator, and the like. Such as figure 1 As shown, the motor control circuit includes a main control circuit 1, an IPM drive circuit 2, a voltage sampling circuit 3, a current sampling circuit 4, a rectification circuit 5, a DC brushless motor 6 and an AC input terminal UAC, an IPM drive circuit 2, and a voltage sampling circuit 3 and the current sampling circuit 4 are both electrically connected to the main control circuit 1, the AC input terminal UAC is electrically connected to the input terminal of the rectification circuit 5, the output terminal of the rectification circuit 5 is electrically connected to the input terminal of the IPM drive circuit 2, and the main control circuit 1 Send the PWM drive signal to the IPM drive circuit 2, the IPM drive circuit 2 drives th...

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Abstract

The invention provides a control method of a brushless DC motor, a computer device and a computer readable storage medium. The method comprises that the motor is driven at the preset rotating speed; the present rotating speed of the motor is obtained; and whether the present rotating speed does not reach the preset rotating speed is determined, and if the present rotating speed does not reach thepreset rotating speed, the duty ratio of a PWM driving signal is adjusted gradually according to change state of the detection voltage. The computer device comprises a controller, and the controller realizes the control method of the brushless DC motor when a computer program stored in a memory are executed. The computer readable storage medium stores the computer program. The control method is realized when the controller executes the computer program. Influence of abrupt change of the input voltage can be reduced, and the reliability of motor control is improved.

Description

technical field [0001] The present invention relates to the technical field of motor control, in particular to a control method for a brushless direct current motor, a computer device applying the control method for a brushless direct current motor, and a computer for applying the control method for a brushless direct current motor readable storage media. Background technique [0002] In order to obtain higher capacity and energy efficiency, existing air-conditioning systems usually use DC motors with higher efficiency, such as externally driven brushless DC motors. During the operation of the DC motor, the bus voltage not only needs to overcome the rotor torque to do work, but also needs to overcome the counter electromotive force of the rotor coil, so the higher the motor speed, the higher the required bus voltage. [0003] The existing control technology for externally driving the brushless DC motor of the air conditioner, when the current target speed of the motor is mu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/10H02P6/06
CPCH02P6/06H02P6/10H02P2207/05
Inventor 陈代兵庞伟陈名才刘杰廖禛覃琨李忠华
Owner GREE ELECTRIC APPLIANCES INC
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