Search query: Motor soft start

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abstract: Ac motor as a motor soft starter auxiliary equipment, can be in ac motor no load or low load, automatic regulation input voltage motor, and may not affect the motor torque. Soft starter for the market, and is engaged in each industry production enterprise welcome, although at present in price, performance and so on have certain difficulty, but with semiconductor devices development of manufacturing technology, and can foresee in the near future, the soft starter certainly become a kind of improving the necessary depth ac motor application equipment. This paper taking three phase ac induction motor soft starter for research object, soft start analysis principle, design soft starter main circuit and circuit other system module, and application of Mat lab simulation, the simulation results indicated that soft start was used in motor start advantages.
author_names: Liu Shue

Fu Chao
title: Design and Simulation of Three phase AC Motor Soft start
venue: 2013 Third International Conference on Intelligent System Design and Engineering Applications
year: 2013

abstract: In this paper two phase soft start control of three phase induction motor is proposed. The present three phase soft starter for induction motor is compared with that of proposed two phase soft starter on the basis of torque fluctuations, starting current demand and starting time of induction motor. A closed loop type of control for voltage and current is used for balanced operation during starting. This proposed topology is capable of minimizing starting current and starting torque fluctuations. Simulation results along with theoretical analysis on 2hp, 460V, four pole, three phase induction motor is presented.
author_names: Shrish Pandey

S Bahadure

Krishna Kanakgiri

N M Singh
title: Two phase soft start control of three phase induction motor
venue: 2016 IEEE 6th International Conference on Power Systems (ICPS)
year: 2016

abstract: Through the analysis of soft start ways which commonly used in medium voltage asynchronous motor, the soft start switching transformer topology of medium voltage asynchronous motor was given. It analyzed some key technologies of motor soft start, and gave the specific solutions. The problem of torque shock caused by the motor power factor angle and heavy start was analyzed especially. The main topological structures of the soft start devices about motor with large single power were given in the paper. Through the actual industrial applications of the soft start device, it showed that the device has reached the intended purposes, the device had a broad application prospect.
author_names: Wang Huan

Su XiangRui

Jin Guangzhe
title: The study of switch transformer medium voltage asynchronous motor soft start device
venue: Proceedings of The 7th International Power Electronics and Motion Control Conference
year: 2012

abstract: Abstract In order to deal with the problems of large start current and low power factor that caused by threephase asynchronous motors start, a new integrative method of soft start and dynamic reactive power compensation is proposed. In this paper, the rule of power factor vs. speed in a three phase asynchronous motor is investigated and the reason of such rule is analyzed. Aiming at the large start current problem, soft start method based on auto transformer and magnetic control reactor (ATMCR) is invented. This method can further reduce start current from gird. Aiming at the low power factor problem, the method of thyristor switched capacitor (TSC) is used to dynamically compensate reactive power. Simulation and experimental results can prove that the integrative method can effectively deal with the problems of large start current and low power factor.
author_names: Chang Yu-fang

Huang Wencong

Yuan Youxin

Wu Ming-hu

Wang Su
title: Research on Reactive Power Compensation Issues in Process of Motor Soft Start
year: 2013

abstract: Soft start circuits with the main device of NTC thermistor,relay and mosfet are provided.The work principle and feature of three schemes are analyzed.The experiment results of each scheme are given.Test results show that the three proposed soft start circuits could inhibit the inrush current of DC motor start effectively.The application fields of the proposed soft start circuits are also given.
author_names: Li Dexin
title: Study of DC Motor Soft Start Circuit
year: 2011

abstract: According to the characteristics of the ac motor starting process, design a fuzzy soft start controller, realize constant current of ac motor soft start control. Using fuzzy soft start controller uses the two dimensional structure, current deviation and deviation change rate as input, Mining Mamdani inference method of fuzzy reasoning. The controller output to the adjustment of the thyristor trigger Angle. The results simulated by using Fuzzy toolbox to design. The results show that the fuzzy soft start controllers reasonable structure, simple rules, and easy to implement, motor soft start control to good effect. Copyright (c) 2014 IFSA Publishing, S. L.
author_names: Zheng Wang

Qi Zhang
title: Research and Design of AC Motor Fuzzy Soft Start Controller
year: 2014

abstract: High power synchronous motor is difficult to start and unable to start and stop freely, so it must be long running. This will cause a lot of energy waste. In order to solve the problem, devices of self controlled soft start with variable frequency for high power synchronous motor are researched and developed. The TMS320F2812 DSP is used as main control chip to do all the control strategies in this soft start platform. This paper also gives a detailed method to do with the error signal of misleading zero crossing points of back EMF caused by inverter commutation, and describes the problem at the switch point from self impulse to back EMF zero crossing detection. It can get the rotor position without position sensor by accurate detection of motor back EMF zero crossing at medium and high speed. In the prototype platform, the motor can be soft started from standstill to rated speed stably and reliably.
author_names: Jin Guangzhe

Zhou Changcheng

Gao Qiang

Xu Dian-guo
title: Research on system of self controlled soft start with variable frequency for synchronous motor
venue: Proceedings of The 7th International Power Electronics and Motion Control Conference
year: 2012

abstract: This paper presents a soft start circuit using the pulse width modulation (PWM) method. The motor is controlled by the dc chopper associated with a low cost PWM chip TL494. The design criteria are stated. The motor HC385MG is tested in experiment. The results illustrate that the circuit effectively reduces the inrush current at start up moment. The circuit also provides the speed adjustment and can be further implemented with the speed regulation and the over current protection.
author_names: Zongwang Lu

Fuyan Sun
title: Soft start circuitry for DC motor
venue: 2011 International Conference on Electrical and Control Engineering
year: 2011

abstract: This article in view of the question that the high power motor could not starting and stopping directly in the industry, proposed one kind of design based on PIC single chip high power motor soft start and intelligence protective devices, utilized real time measurement and control method with the feature of synchronous sampling electric current spurt value inverse time lag protection, according to the load situation four starting and protection control soft start ways of the under intelligent protection controller were designed. Intelligent soft starter design principles based on PIC single chip is articulated. The hardware circuit design, software flow design and test data analysis are given in details. By producing in Zibo Galaxy high technology development co. Ltd.,it shows that this smart soft starter has the characteristics which are flexible parameter setting, intuitive liquid crystal display, diverse starting way, precise current limiting protection, accurate protection of lack phase, low cost, collecting soft start and running protection with a body's protection controller, are suitable specially for the starting and control of high power motor, so the protector has broad application prospects. Index Terms motor, soft start, over load protection, PIC single chip
author_names: Lina Liu

Jishun Jiang

Liang Zhang
title: Research of Electric Motor Multi type Soft Start Control Mode Based on over load Protection
year: 2011

abstract: For the problem the AC induction motor direct starting current is too,of current closed loop electronic control fuzzy soft starter is designed,The soft starter can limit the starting current,in order to reduee the to the equipment.Between the feedback current and thyristor trigger angle since relation a fuzzy controller is presented to reduce the starting current.And improve the motor starting performance.Simulation results show that: the fuzzy soft start controller.Hasa easonable structure and simple rules easy to implement,effect of motor soft start control is good.
author_names: Zhang Liang
title: Simulation of Fuzzy Soft Start of Asynchronous Motor
year: 2011