Motor braking method and microcontroller

A technology of motor braking and microcontroller, which is applied in the direction of motor generator control, electromechanical brake control, electronic commutation motor control, etc., and can solve problems such as DC bus voltage rise, bus capacitance breakdown, motor control abnormality, etc.
CN110829931AActive Publication Date: 2020-02-21SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
Publication Date
2020-02-21

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Abstract

The invention provides a motor braking method and a microcontroller. The motor braking method comprises the steps of N1, determining whether an operation state of a motor is located in a weak magneticregion when a braking instruction is received, if so, executing N2, and if not, executing N3; N2, regulating and controlling a reference current of a direct axis to zero, determining a first PWM waveduty ratio based on the reference current of the direct axis and a collected estimated current, inputting a signal with the first PWM wave duty ratio to a motor, and executing N1; and N3, regulatingand controlling the reference current of a quadrature axis to a preset negative component, determining a second PWM wave duty ratio based on the regulated and controlled preset negative component andthe collected estimated current, and inputting a signal with the second PWM wave duty ratio to the motor till that the motor stops operating. In the scheme provided in the invention, an opposite moment is input to the motor so as to brake the motor, rising of a direct-current bus voltage is avoided, and normal braking of the motor can be guaranteed.
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Description

technical field

[0001] The invention relates to the technical field of electrical control, in particular to a motor braking method and a microcontroller. Background technique

[0002] Home appliances such as washing machines, refrigerators, air conditioners, etc., all need to run with the help of motors. In order to quickly decelerate or stop the motor running at high speed, the motor needs to be braked. In the existing braking method, a large amount of mechanical energy is mainly converted into electrical energy. The energy is fed back to the busbar, causing the DC busbar voltage to rise rapidly, and even breakdown the busbar capacitor, resulting in abnormal motor control. SUMMARY OF THE INVENTION

[0003] The embodiments of the present invention provide a motor braking method and a microcontroller. By inputting an opposite torque to the motor to brake the motor, the DC bus voltage can be prevented from rising, and the normal braking of the motor can be ensured. [000...

Claims

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