Asynchronous motor soft starter and predictive feedback control method based on same

An asynchronous motor, soft starter technology, applied in the direction of a single multi-phase induction motor starter, motor generator/starter, etc., can solve the problems of disorder, vibration, secondary impact, etc., to improve the disorder and control the speed sensitively , The effect of strong adaptability to working conditions

Active Publication Date: 2018-06-08
江苏水科尚禹能源技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a soft starter for asynchronous motors and a predictive feedback control method based on it, which solves the technical problems of disorder, vibration and secondary impact during the soft start of stepper motors

Method used

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  • Asynchronous motor soft starter and predictive feedback control method based on same
  • Asynchronous motor soft starter and predictive feedback control method based on same
  • Asynchronous motor soft starter and predictive feedback control method based on same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as Figure 1-Figure 3 A soft starter for an asynchronous motor, including a three-phase power supply interface, a control power supply circuit, a thyristor conduction angle detection circuit, a synchronous signal acquisition module, a central auxiliary processor, a serial port simulation debugging module, a thyristor drive and a phase control voltage regulation circuit, a voltage Current detection circuit, digital-analog A / D conversion circuit, central main processor, bypass control module, human-computer interaction display module and asynchronous motor interface;

[0045] The central auxiliary processor and the central main processor are connected through the SPI bus;

[0046] The three-phase power interface is connected to the input end of the thyristor drive and the phase-controlled voltage regulation circuit, and the output end of the thyristor drive and the phase-controlled voltage regulation circuit is connected to the interface of the asynchronous motor;

...

Embodiment 2

[0060] The predictive feedback control method of a soft starter for an asynchronous motor described in Embodiment 2 is implemented on the basis of the soft starter for an asynchronous motor described in Embodiment 1, and includes the following steps:

[0061] Step 1: Establish the asynchronous motor soft starter, connect the three-phase power supply interface with the three-phase electricity of the mains, and connect the asynchronous motor interface to the asynchronous motor;

[0062] Step 2: The thyristor conduction angle detection circuit is used to detect the real-time data of the thyristor conduction angle in the thyristor drive and phase-controlled voltage regulation circuit, and generate real-time data of the thyristor conduction angle;

[0063] The synchronous signal acquisition module is used to detect the zero-crossing moment of the voltage of the three-phase power supply;

[0064] The voltage and current detection circuit collects the voltage signal and current signa...

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Abstract

The invention discloses an asynchronous motor soft starter and a predictive feedback control method based on the same, which belong to the technical field of automatic detection and control. The asynchronous motor soft starter comprises a three-phase power interface, a control power loop, a thyristor conduction angle detection loop, a synchronization signal acquisition module, a central auxiliaryprocessor, a serial port simulation debugging module, a thyristor driving and phase controlled voltage regulation circuit, a voltage and current detection loop, a digital-to-analog A/D conversion loop, a central main processor, a bypass control module, a man-machine interaction display module and an asynchronous motor interface. The technical problems of disturbance, oscillation and secondary impact during the soft starting of an asynchronous motor are solved.

Description

technical field [0001] The invention belongs to the technical field of automatic detection and control, in particular to an asynchronous motor soft starter and a predictive feedback control method based on it. Background technique [0002] Since the three-phase asynchronous motor is a kind of counter electromotive force load, an inrush current several times the rated current of the motor will be generated at the initial moment of starting the three-phase asynchronous motor. When the power of the three-phase asynchronous motor is large, the inrush current will cause fluctuations in the grid voltage and affect the operation of other equipment on the same grid. At the same time, the power factor angle of the three-phase asynchronous motor is constantly changing during the starting process, especially when the motor speed is close to the rated speed, the three-phase asynchronous motor will appear obvious vibration phenomenon. The asynchronous motor soft starter is a new type of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/26
CPCH02P1/26
Inventor 李志安崔得志王殿俊吉拥平
Owner 江苏水科尚禹能源技术研究院有限公司
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