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Speed controller

A speed controller, gain controller technology, applied in electric speed/acceleration control, control system, motor control and other directions, can solve the problems of noise, motor vibration, motor speed error, etc.

Inactive Publication Date: 2010-06-23
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of the measurement accuracy of the speed measuring device, the measured speed of the motor will have an error. When this error is amplified by a large proportional gain in the motor control loop, it is easy to generate a current spike (spike) and transmit it to the power that controls the motor state. Components, such as frequency converters, affect the accuracy and stability of the motor control circuit to control the motor, causing vibration and noise of the motor, especially when the motor rotates at a low speed

Method used

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Embodiment Construction

[0014] Please refer to figure 1 , the preferred embodiment of the speed controller 12 of the present invention includes a processing module 120, a comparator 123a and an arithmetic unit 125, and the processing module 120 includes a gain controller 121, a non-gain controller 122, a coefficient selection 124 and a multiplier 126, the input terminals of the gain controller 121 and the non-gain controller 122 are both input terminals of the processing module 120, and serve as a first input terminal of the speed controller 12 , the input end of the comparator 123a is used as a second input end of the speed controller 12, the output end of the comparator 123a is connected to the input end of the coefficient selector 124, the gain controller 121 The output end is connected to an input end of the multiplier 126, the output end of the coefficient selector 124 is connected to the other input end of the multiplier 126, the non-gain controller 122 and the multiplier 126 The output ends a...

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PUM

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Abstract

The invention discloses a speed controller, which is used in a motor control circuit. The speed controller comprises a comparator, a processing module and a computing device, the input end of the processing module receives a speed differential value of a control circuit, i.e. the difference between a command speed and a measured speed of a motor, and the comparator receives the measured speed or the command speed and compares the measured speed or the command speed with an internal critical speed value. When the speed value received by the comparator is larger than the critical speed value, the comparator outputs a first signal to the processing module, and when the speed value received by the comparator is smaller than the critical speed value, the comparator outputs a second signal to the processing module. When the comparator outputs the first signal, the processing module outputs a first speed differential gain to the computing device, and when the comparator outputs the second signal, the processing module outputs a second speed differential gain smaller than the first speed differential gain to the computing device. The computing device computes the received gain value and then outputs a command current to the control circuit. The speed controller can also reduce the vibration and noise of the motor.

Description

technical field [0001] The invention relates to a controller, in particular to a speed controller used in a motor control loop. Background technique [0002] In the field of motor control, a speed measuring device, such as an encoder, is usually used as a feedback system for motor speed parameters to feed back the current speed of the motor to the motor control loop, so that the control elements in the motor control loop can be based on the speed, Adjust the motor in time to make the motor run at an appropriate speed. Due to the limitation of the measurement accuracy of the speed measuring device, the measured speed of the motor will have an error. When this error is amplified by a large proportional gain in the motor control loop, it is easy to generate a current spike (spike) and transmit it to the power that controls the motor state. Components, such as inverters, affect the accuracy and stability of the motor control circuit to control the motor, causing vibration and n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D13/62H02P27/04
CPCH02P21/0003H02P21/05H02P21/06Y10S388/906
Inventor 陈世章陈信安洪荣聪林佑任洪荣煌赖幼仙
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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