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Energy saving control method for fast speed change of motor and energy saving control system for fast speed change of motor

An energy-saving control system and energy-saving control technology, applied in control systems, vector control systems, motor generator control, etc., can solve problems such as increased motor energy consumption, and achieve the effect of reducing energy consumption and suppressing current spikes

Inactive Publication Date: 2018-03-06
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to solve the technical problem of increased energy consumption of the motor due to the occurrence of current spikes when the servo motor changes speed quickly

Method used

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  • Energy saving control method for fast speed change of motor and energy saving control system for fast speed change of motor
  • Energy saving control method for fast speed change of motor and energy saving control system for fast speed change of motor
  • Energy saving control method for fast speed change of motor and energy saving control system for fast speed change of motor

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Embodiment Construction

[0022] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0023] In order to solve the above-mentioned technical problems to be solved by the present invention, in a preferred embodiment, the present invention provides an energy-saving control method when the motor is rapidly changed. Such as figure 1 As shown, the energy-saving control method for the fast speed change of the motor may include the following steps:

[0024] Step S1, obtain the learning output u of the control current iq(t) of the motor at the moment of the Kth cycle t k (t).

[0025] Specifically, the motor may be a permanent magnet synchronous motor. Since the motor is at the moment t of rapid speed change, the control current i of the motor q (t) A current spike will be generated at this moment, so in order to correct the current spike generated at this moment, the control current of the motor can be ke...

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Abstract

The invention discloses an energy saving control method for fast speed change of a motor and an energy saving control system for fast speed change of the motor. According to the method, the learning updating law that the following error e(t) of control current iq(t) of the last period t moment of the motor is used as the learning output uk+1(t) of the control current iq(t) of the current period tmoment is applied, and then the learning output uk+1(t) is superposed with the learning output uk(t) of the control current iq(t) of the last period t moment to act as the learning output uk+1(t) of the control current iq(t) of the current period t moment, and then the learning output uk+1(t) of the control current iq(t) of the current period t moment is applied to correct the actual output valueof the control current iq(t) so that the control current iq of the motor is maintained to be constant within the limited number of learning periods, the current peak can be effectively suppressed andthe energy consumption of the motor can be reduced.

Description

technical field [0001] The invention relates to the technical field of motor energy-saving control, in particular to an energy-saving control method and system for rapid motor speed change. Background technique [0002] Servo motors are widely used in industry due to their high control precision and fast response. The vector control technology is the core technology for the stable operation of the servo motor. Its main idea is to convert the three-phase alternating current into two-phase alternating current, and make one phase current of the two-phase current always be zero, and make the other phase current of the two-phase current be zero. The phase current fluctuates with the load, such as figure 1 As shown, curve a represents one phase current of the two-phase current, curve b represents the other phase current of the two-phase current, and curve c represents the rotational speed of the servo motor. But when the servo motor accelerates suddenly, such as figure 1 The sl...

Claims

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Application Information

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IPC IPC(8): H02P21/22
CPCH02P21/22
Inventor 张碧陶刘细平
Owner JIANGXI UNIV OF SCI & TECH
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