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System and method for controlling variable-frequency washing machine based on direct-current brushless motor drive

A brushless DC motor and control system technology, applied in the direction of motor control, washing machine control device, control system, etc., can solve the problem of low control accuracy of frequency conversion washing machine, improve safety and reliability, improve accuracy and safety effect

Active Publication Date: 2020-07-17
宁波普尔机电制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the technical problem that the control accuracy of the current frequency conversion washing machine is not high

Method used

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  • System and method for controlling variable-frequency washing machine based on direct-current brushless motor drive
  • System and method for controlling variable-frequency washing machine based on direct-current brushless motor drive
  • System and method for controlling variable-frequency washing machine based on direct-current brushless motor drive

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Embodiment 1

[0024] A control system based on DC brushless motor driven frequency conversion washing machine, such as figure 1As shown, this embodiment includes a transformer T1, a rectifier, a voltage stabilizer, a converter, a water level sensor 306, a water inlet valve 303, a drain valve 302, a keypad 304, a vibration sensor 305, a brushless DC motor rotor 401 positioning unit and The controller 301, the transformer T1, the rectifier, the voltage stabilizer and the converter are connected in sequence, the primary coil of the transformer T1 is connected to the mains, and the mains is transformed by the transformer T1 and then converted into direct current by the rectifier and input after being regulated by the voltage stabilizer To the converter, the three windings of the DC brushless motor are connected to the converter, the three Hall sensors 202 of the DC brushless motor are connected to the controller 301, and the controller 301 controls the DC brushless motor according to the preset ...

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Abstract

The invention relates to the technical field of automatic control, in particular to a system and method for controlling variable-frequency washing machine based on direct-current brushless motor drive. The system comprises a transformer T1, a rectifier, a voltage stabilizer, a current changer, a water level sensor, a water inlet valve, a drainage valve, a key board, a vibration sensor, a direct-current brushless motor rotor positioning unit and a controller. Electric electricity passes through the transformer T1 and then is converted into direct-current electric through the rectifier, and thedirect-current electricity is input into the current changer after being subjected to voltage stabilization through the voltage stabilizer. Three windings of a direct-current brushless motor are connected with the current changer, and three Hall sensors of the direct-current brushless motor are connected with the controller; and the direct-current brushless motor rotor positioning unit is mountedon a rotor of the direct-current brushless motor. The system and method have the substantial effects that the control accuracy and safety during direct-current brushless motor starting are improved, and then the safety and reliability of the variable-frequency washing machine are improved.

Description

technical field [0001] The invention relates to the technical field of automation control, in particular to a control system and method for a frequency conversion washing machine driven by a DC brushless motor. Background technique [0002] The brushless DC motor is composed of a motor body and a driver, and is a typical mechatronics product. The stator windings of the motor are mostly made into a three-phase symmetrical star connection, which is very similar to the three-phase asynchronous motor. The magnetized permanent magnet is stuck on the rotor of the motor. In order to detect the polarity of the motor rotor, a position sensor is installed in the motor, which is commonly used as a Hall sensor. The driver is composed of power electronic devices and integrated circuits, etc. Its functions are: to receive the start, stop, and brake signals of the motor to control the start, stop, and brake of the motor; to receive position sensor signals and forward and reverse signals t...

Claims

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Application Information

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IPC IPC(8): D06F33/52H02P6/08H02P1/18H02H7/085
CPCH02P1/18H02P6/08H02H7/085H02P2203/03
Inventor 左宜计佰强
Owner 宁波普尔机电制造有限公司
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