DC motor speed differential feedback control device and method

A technology of DC motors and control methods, applied in the direction of DC motor speed/torque control, control systems, electrical components, etc., can solve the problems of overdrive easily caused by equivalent damping, achieve dynamic response time without overshoot and oscillation, and respond Increased speed and avoid blindness effects

Inactive Publication Date: 2016-06-22
JIANGSU UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a DC motor speed differential feedback control device and method to solve the problem that the existing digital control method is prone to overdrive when encountering a load with a large equivalent damping

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  • DC motor speed differential feedback control device and method
  • DC motor speed differential feedback control device and method
  • DC motor speed differential feedback control device and method

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Embodiment Construction

[0031] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0032] Such as figure 1 Shown is a block diagram of the DC motor speed differential feedback control device and method according to the embodiment of the present invention. The control device is composed of touch screen 110, programmable controller 120, digital / analog conversion module 130, power drive unit 140, servo object 150, photoelectric encoder 160 and high-speed counting module 170; programmable controller 120, digital / analog conversion Module 130, power drive unit 140, servo object 150, photoelectric encoder 160 and high-speed counting module 170 are connected circularly in a clockwise direction; wherein said programmable controller 120 is also connected with touch screen 110; 151 and the mechanical load 152 are connected in series in sequence, the DC motor 151 is also connected to the power drive unit 140 , and the mechanical load 152 is also connected to t...

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Abstract

The invention discloses a continuous current dynamo speed derivative feedback control device and method. The device is composed of a touch screen, a programmable controller, a digital-to-analog conversion module, a power driving unit, a servo object, an optical-electricity encoder and a high-speed counter module, wherein the servo object is composed of a continuous current dynamo and a mechanical load. The control method comprises the steps of inputting a speed digital quantity command signal after initializing an integrator, reading a feedback signal of the optical-electricity encoder, conducting first difference operation on the feedback signal, conducting second order difference operation on the first difference signal, multiplying the result and a second order difference coefficient to obtain a second order difference product, calculating the error between the input speed digital quantity command signal and the sum of the first difference operation result and the second order difference product, conducting accumulated integration on an error signal obtained, multiplying the result and an integral coefficient to obtain an integral product, and conducting digital-to-analog conversion on the integral product to obtain an analog quantity control signal to control the servo object through a servo amplifier.

Description

Technical field: [0001] The invention relates to a DC motor speed differential feedback control device and method, in particular to a system for controlling the DC motor speed in a digital control mode. Background technique: [0002] There is no doubt that the precise control of the speed of the DC motor must adopt the closed-loop feedback control method, that is, to calculate the error between the input and the output, and the calculation result is amplified by the power drive unit to drive the DC motor to obtain better control accuracy. The control operation for error is nothing more than a combination of proportional (P), integral (I), and differential (D). In order to satisfy sufficient control accuracy, that is, the steady state of the system is indifferent, the integral operation is essential in the forward channel of the control loop. If the differential operation is added in the forward channel, the input signal is The direct consequence of adding a forcing term is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P7/00
Inventor 朱鹏程张维光张冰蔚沈泽洪
Owner JIANGSU UNIV OF SCI & TECH
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