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A kind of motor braking method and microcontroller

A technology of motor braking and microcontroller, applied in motor generator control, control electromechanical brake, electronic commutation motor control, etc., can solve the problems of breakdown bus capacitance, DC bus voltage rise, abnormal motor control and so on

Active Publication Date: 2021-08-31
SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The energy is fed back to the bus, causing the voltage of the DC bus to rise rapidly, and in severe cases, the capacitor of the bus is even broken down, resulting in abnormal control of the motor

Method used

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  • A kind of motor braking method and microcontroller
  • A kind of motor braking method and microcontroller
  • A kind of motor braking method and microcontroller

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Embodiment Construction

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0045] Such as figure 1 As shown, the embodiment of the present invention provides a motor braking method, and the motor braking method may specifically include:

[0046] Step 101: When a braking command is received, it is judged whether the running state of the motor is in the field weakening zone, if yes, then execute step 102, otherwise, execute ste...

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Abstract

The present invention provides a motor braking method and a microcontroller. The motor braking method includes: N1: When receiving a braking command, judge whether the running state of the motor is in the field weakening zone, if so, execute N2, otherwise , execute N3; N2: adjust the reference current of the direct axis to zero, and determine the first PWM wave duty cycle based on the reference current of the direct axis and the collected estimated current, and have the first PWM wave duty cycle for the motor input Ratio signal, and execute N1; N3: adjust the reference current of the quadrature axis to a preset negative component, and determine the second PWM wave duty cycle based on the adjusted preset negative component and the collected estimated current , and input a signal with the duty ratio of the second PWM wave to the motor until the motor stops running. The solution provided by the invention is that the motor inputs opposite torque to brake the motor, so as to avoid the voltage rise of the DC bus and ensure normal braking of the motor.

Description

technical field [0001] The invention relates to the technical field of electric appliance 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 be operated by electric motors. In order to quickly decelerate or stop a high-speed motor, it is necessary to brake the motor. In the existing braking method, a large amount of mechanical energy is mainly converted into electric energy. The energy is fed back to the bus, causing the voltage of the DC bus to rise rapidly, and in severe cases, the capacitor of the bus is even broken down, resulting in abnormal control of the motor. Contents of the invention [0003] The embodiment of the present invention provides a motor braking method and a microcontroller. By inputting opposite torque to the motor to brake the motor, DC bus voltage rise is avoided, and normal braking of the motor can be ens...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/14H02P3/06
CPCH02P3/06H02P21/0089H02P21/14H02P21/22
Inventor 任艳华唐婷婷王声纲杨正朱绯潘军
Owner SICHUAN HONGMEI INTELLIGENT TECH CO LTD
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