Voltage Control of Three-Phase Induction Motor for Energy Saving (original) (raw)
Related papers
Variable Voltage Control of Three-Phase Induction Motor for Energy Saving
ERJ. Engineering Research Journal, 2021
Energy saving is considered one of the important factors for industrial and commercial applications. Induction motors are the mostly preferred motor in the industry due to their reliability, robustness, price and rugged construction. The largest percentage of consumed energy in the industrial section is consumed by induction motors. So, Energy conservation in induction motor drive leads to reduction in power consumption and electricity cost. This paper studies an energy saving technique for squirrel cage induction motor. The energy saving is achieved by controlling the voltage applied to the stator winding using the three phase AC voltage controller. The simulation verifications were performed using MATLAB/Simulink. The results show that the proposed scheme gives rise to considerable energy savings.
The efficiency of induction motor drives operating under variable conditions can be improved by predicting the optimum flux that minimizes the losses. In this study, a Loss-Minimization Controller (LMC) and a Search Controller (SC) are combined. The output from the controllers would drive the field oriented control inverter in order to achieve the optimum flux in the motor that minimizes the losses. For this purpose, a mathematical model for calculating the total power losses as a function of magnetic flux and a factor to obtain feedback as a function of optimum flux were discussed. An LMC-SC vector-controlled induction motor drive system was modelled, simulated and tested. The results have validated the effectiveness of this system in minimizing the motor operating losses, especially at light and medium loads. The proposed controller can be implemented in adjustable speed induction motor drive systems with variable loads, operating below rated speed.
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.
Energy Efficient Control of Three-Phase Induction Motor - A Review
Due to robustness, reliability, low price and maintenance free, induction motors (IMs) used in most of the industrial applications. The influence of these motors (in terms of energy consumption) in energy intensive industries is significant in total input cost. This paper presents a review of the developments in the field of efficiency optimization of three-phase induction motor through optimal control and design techniques. Optimal control covers both the broad approaches namely, loss model control (LMC) and search control (SC). Optimal design covers the design modifications of materials and construction in order to optimize efficiency of the motor. The use of Artificial Intelligence (AI) techniques such as artificial neural network (ANN), fuzzy logic, expert systems and nature inspired algorithms (NIA), Genetic algorithm and differential evolution in optimization are also included in this paper. Experimental and simulation examples on efficiency optimization are illustrated.
2007
In this paper three voltage control strategies for three-phase ac voltage regulator have been studied. These strategies depend on varying the stator ac voltage to control the speed of threephase induction motor. These strategies are phase angle control (PAC), extinction angle control (EAC), and modified phase angle control (MPAC). The first control strategy is carried out using three back to back thyristors connected in series with motor terminals. The other two techniques are used with converter having six bidirectional switches. Performance evaluation of the motor under these switching techniques is shown. Simulation of the system is carried out by PSIM computer program. The simulation results show stable operation for wide range of speed control. The level of harmonics in the supply currents and power factor have been also evaluated for different control strategies.
2007
In this paper three voltage control strategies for three-phase ac voltage regulator have been studied. These strategies depend on varying the stator ac voltage to control the speed of threephase induction motor. These strategies are phase angle control (PAC), extinction angle control (EAC), and modified phase angle control (MPAC). The first control strategy is carried out using three back to back thyristors connected in series with motor terminals. The other two techniques are used with converter having six bidirectional switches. Performance evaluation of the motor under these switching techniques is shown. Simulation of the system is carried out by PSIM computer program. The simulation results show stable operation for wide range of speed control. The level of harmonics in the supply currents and power factor have been also evaluated for different control strategies.
EFFICIENCY OPTIMIZATION OF THREE PHASE SQUIRREL CAGE INDUCTION MOTOR USING SIMULINK MODELS
ijetrm journal , 2020
Induction Motor (IM) control is a difficult and complex engineering problem due to multivariable, highly nonlinear, time-varying dynamics and unavailability of measurements. In this paper vector control for speed control of three-phase Squirrel Cage Induction Motor has been developed and analyzed. The present approach avoids use of flux and speed sensors which decreases the mechanical cost and robustness. Vector control has replaced traditional control method such as using the ratio of voltage and frequency as a constant, which improve greatly dynamic control efficiency of motor.
Maximizing the Efficiency of 3-Phase Induction Motors (Squirrel Cage Motor
Induction motors are used for many industrial purposes. They can act as electrical drives for many processes in many production processes. This paper will focus on how to improve the efficiency of these motors-3 phase squirrel cage induction motor (SCIM) in order to save electrical energy. This is because it has been experimentally observed that the efficiency of the induction motors is poor with low load conditions, hence more energy is wasted. We will be looking at the various losses in the induction motor. Also the paper will sample some methods like the conventional methods and the fuzzy logic approach as used in maximizing/optimizing the efficiency of the induction motors. We shall also sample results from simulations that prove show how the efficiency is maximized by adjusting the input voltage.
Speed Control of Three Phase Squirrel Cage Induction Motor
International Journal of Engineering Research and, 2015
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.
2007 International Aegean Conference on Electrical Machines and Power Electronics, 2007
In this paper three voltage control strategies for three-phase ac voltage regulator have been studied. These strategies depend on varying the stator ac voltage to control the speed of threephase induction motor. These strategies are phase angle control (PAC), extinction angle control (EAC), and modified phase angle control (MPAC). The first control strategy is carried out using three back to back thyristors connected in series with motor terminals. The other two techniques are used with converter having six bidirectional switches. Performance evaluation of the motor under these switching techniques is shown. Simulation of the system is carried out by PSIM computer program. The simulation results show stable operation for wide range of speed control. The level of harmonics in the supply currents and power factor have been also evaluated for different control strategies.