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A motor power limiting method and motor control system

A technology of motor power and motor control, applied in control systems, motor control, electrical components, etc., can solve problems such as the inability to ensure stable operation of motors, achieve the effect of avoiding excessive temperature rise and device damage, and improving operational stability

Active Publication Date: 2017-12-15
GUANGDONG WELLING ELECTRIC MACHINE MFG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a motor power limiting method, aiming to solve the problem in the prior art that the motor power cannot be guaranteed to run stably in the process of limiting the motor power due to excessive motor power

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  • A motor power limiting method and motor control system
  • A motor power limiting method and motor control system

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Embodiment Construction

[0026] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] In the embodiment of the present invention, the motor is driven and controlled by the motor control system, the motor control system controls the operation of the motor according to the power limit value, the speed limit value and the preset torque value, and the motor control system has a speed PI regulator, The speed PI regulator is used to perform closed-loop control on the speed and torque of the motor according to the PI (Proportional&Integral, proportional and integral) algorithm.

[0028] figure 1 The implementation process of the motor power limiting method provided by the embodimen...

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Abstract

The invention belongs to the technical field of motor power control and provides a motor power limiting method and a motor control system. The current motor power is detected during the motor running, and when the current motor power is greater than the power limit value, the speed adjustment value is obtained according to the difference between the current motor power and the power limit value, and the speed limit value is updated according to the speed adjustment value, and then Determine whether the absolute value of the deviation between the current motor actual speed and the speed limit value is less than the preset deviation value, if so, control the motor operation according to the preset torque value, if not, according to the current output of the speed PI regulator in the motor control system Torque and preset torque value Get the control torque value, and control the motor operation according to the control torque value, so as to limit the motor power by adjusting the speed limit value and control torque value, avoiding the The motor is damaged and the temperature rise of the motor control system exceeds the standard and the device is damaged, which improves the operation stability of the motor.

Description

technical field [0001] The invention belongs to the technical field of motor power control, and in particular relates to a motor power limiting method and a motor control system. Background technique [0002] At present, in household appliances that need to be driven by motors (such as range hoods, washing machines, and air conditioners), the motors are driven and controlled by the motor control system. When the motor control system controls the motor to drive the load to run, if it is caused by external factors If the power of the motor rises beyond the limit value, the motor control system will cause abnormal operation of the system due to excessive temperature rise and damage to power devices, and will cause damage to the motor body. Therefore, the prior art proposes the following two solutions: [0003] (1) When the motor power exceeds the limit value, the motor is allowed to perform power overload operation for a certain period of time, and then control the motor to sto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P29/02H02P29/032
Inventor 张倩孙杰
Owner GUANGDONG WELLING ELECTRIC MACHINE MFG