Speed Control of Three Phase Squirrel Cage Induction Motor (original) (raw)
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IJERT-Speed Control of Three Phase Squirrel Cage Induction Motor
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/speed-control-of-three-phase-squirrel-cage-induction-motor https://www.ijert.org/research/speed-control-of-three-phase-squirrel-cage-induction-motor-IJERTV4IS040346.pdf The paper describes the open loop control of the 3 phase induction motor at variable speed using a 3 phase inverter. The 3 phase inverter is supplied from a 400V DC supply. The 3 phase inverter with 3 legs use IGBTs as switches for the generation of 3 phase output. The switches are controlled by pulses created by the PIC microcontroller. The PWM technique used in this project is sinusoidal pulse width modulation. PIC mi crocontroller is used to generate PWM signals. These low voltage signals are given to opto-couplers. The opto-coupler isolates the controller from high voltage level circuit and raises the voltage level of output. The output is fed to the driver circuit for a half bridge of IGBT. For the protection of IGBTs against the over voltages and from short circuiting we have used bootstrapping arrangement. The PIC microcontroller is used to generate PWM signals at variable frequencies. The frequency can be varied using a manual input to the controller.
International Journal of Engineering Research and Technology (IJERT), 2014
https://www.ijert.org/speed-control-of-3-phase-squirrel-cage-induction-motor-by-3-phase-ac-voltage-controller-using-spwm-technique https://www.ijert.org/research/speed-control-of-3-phase-squirrel-cage-induction-motor-by-3-phase-ac-voltage-controller-using-spwm-technique-IJERTV3IS10584.pdf ] Reddi Ganesh [2] P. S. V. Kishore [3] [1] [2] Vignan's institute of information technology/electrical and electronics department, Visakhapatnam, India [3] Addis Ababa university/ electrical and electronics department, Addis Ababa, Ethiopia. Abstract The objective of this paper is to investigate the effect of SPWM technique on 3-phase ac voltage controller for speed control of induction motor drive. SPWM for closed loop control of induction motor drive fed by ac voltage controller is designed and considered for evaluation. AC voltage controller makes use of line commutation and as such no complex commutation circuitry is required in this controller. The main application of this model is winders, fan drives, domestic pumps, industrial heating and lighting control. Simulation is carried out by using MATLAB 2009b and programming for firing of SCR is done by using KEIL.
Performance Analysis of three phase induction motor drive for Various PWM control Methods
2015
This paper presents performance analysis of three phase induction motor drive for various control methods. Three phase inverters are mostly used in industries for adjustable and variable speed three phase induction motor drive systems. The working of three phase induction motor drive system is discussed. The simple method of generation of PWM signals in different modes of operation using single timer feature of PIC microcontroller are discussed and presented. Four different PWM control methods and there implementation using microcontroller chip to operate three phase inverter in four different modes is discussed. The desired control signals are generated using PIC microcontroller and applied to three phase inverter through driver circuit. Three phase inverter performance parameters are determined and compared for single pulse PWM modes such as simple 120 conduction mode, 180 conduction mode, and multiple pulse PWM modes such as advanced SPWM and harmonic injected PWM mode. The compl...
“Various Speed Control Techniques of Three Phase Induction Motor’’
2018
This paper presents Space Vector Modulation of Inverter fed with three phase Induction Motor using MatLab Simulation. Induction motors are the most widely used electrical motors due to their reliability, low cost and robustness. However, induction motors do not inherently have the capability of variable speed operation. Due to this reason, earlier dc motors were applied in most of the electrical drives. But the recent developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives. Voltage control is required to meet the variation in the input voltage and to regulate the output of the inverter and it is an algorithm for the control of Pulse Width Modulation technique. SVM gives better harmonic response and higher efficiency compared to pulse width modulation techniques. KeywordsSVM Technique, PI Control, Speed control method, VSI bridge inverter, MatLab.
Speed regulation of induction motor with PWM inverter
2021
This paper presents the speed regulation of a 2.2 kW asynchronous squirrel-cage motor, a product of company Rade Koncar, with the aid of a voltage inverter controlled by the pulse-width modulation principle. The simulation circuit is developed in software Powersim. The exact motor data are input in the simulation model and the operation of the motor is simulated for various operating frequencies of the inverter. As an output, the transient characteristics of speed, current, and torque are obtained at various operating speeds i.e. below and above the rated speed of the motor. The effect of the field weakening is observed at higher operating speeds. Obtained results of speed, torque, and currents are compared with the motor data obtained from the analytical model of the motor and data of the manufacturers of variable speed drives, for operating regimes different than the rated. The simulation can serve as an example that proves the theoretical principles of pulse-wide modulation where...
Journal of Computers, 2013
The speed of a three-phase induction motor can be varied within a wide range other than its rated value if its input parameters (frequency, voltages) are varied properly. For industrial, mainly in knitting and some other sophisticated use of three-phase induction motor, precise and accurate control of the speed of the motor is necessary. The present three-phase inverter is so designed that its input parameters can be easily varied through proper software program and computer interfacing hardware. N-channel MOSFET is used as power device but may be replaced with IGBT. A special one way delay circuit is introduced to ensure non short circuit situation. The input frequency to the inverter can be varied by varying the input voltage to the Voltage Controlled Oscillator (VCO). The proper input voltage to the inverter is set by Automatic Voltage Regulator (AVR) instructed by the computer. Though the frequency of the inverter can be varied between a wide range, the inter phase separation remains always 120 0 yielding a true pattern of a three-phase power supply. Introduction of microcomputer and associate of software programs in three-phase induction motor control system as proposed is accurate and reliable in terms of accurate and complex speed control of the motor.
IJERT-Speed Control of Induction Motor using PWM Technique
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/speed-control-of-induction-motor-using-pwm-technique https://www.ijert.org/research/speed-control-of-induction-motor-using-pwm-technique-IJERTV4IS040251.pdf Speed control of induction motor is a new technique. It has high-efficiency which drives ac induction motor with PWM modulated sinusoidal voltage and design of a low cost.Circuit operation is controlled by using 8051 family microcontroller. The circuit is capable of supplying single phase induction motor with varying ac voltage.The mains ac voltage is directly modulated. It requires a lower number of active and passive components which compared with costly converter. This proposed control technique is use in consumer and industrial products like washing machine, dishwashers, ventilators, compressors.
THREE PHASE INDUCTION MOTOR DRIVE USING IGBTs AND CONSTANT V/F METHOD
This paper presents design and analysis of a three phase induction motor drive using IGBT"s at the inverter power stage with volts hertz control (V/F) in closed loop using dsPIC30F2010 as a controller. It is a 16 bit high-performance digital signal controller (DSC). DSC is a single chip embedded controller that integrates the controller attributes of a microcontroller with the computation and throughput capabilities of a DSP in a single core. A 1HP, 3-phase, 415V, 50Hz induction motor is used as load for the inverter. Digital Storage Oscilloscope Textronix TDS2024B is used to record and analyze the various waveforms. The experimental results for V/F control of 3-Phase induction motor using dsPIC30F2010 chip clearly shows constant volts per hertz and stable inverter line to line output voltage. Keywords---DSC, constant volts per hertz, PWM inverter, ACIM.
Three-phase single switch PWM controlled Induction motor drive
This paper presents a realization to obtain high efficiency and control on power factor of three phase high power Induction motor Drive and Three phase squirrel cage Induction motor require less maintenance and rugged in construction. The proposed Three phase induction motor drives makes used of single controllable switch connected across the three phase diode bridge rectifier forming A.C. switch for chopping three phase A.C. voltage With the help of proposed topology .the chopped three phase A.C. voltages appear across stator voltage terminals of three phase induction motor .The magnitude of A.C. voltage is controllable with the help of high frequency PWM .the specialty of these scheme with high frequency controlling the speed of induction motor with high frequency of single semiconductor switch and no freewheeling switch .The speed of the three phase induction motor with fan load will be controllable within around 50% of the rated motor speed. This drive would find utility in Industrial high power cooling fans, blowers and pumps. Proposed drive is expected to provide higher efficiency, high power factor and required speed range for above applications with simplicity and economy