Abstract
The importance and demand of renewable energy have increased rapidly, especially due to the fact that the fossil fuels are reducing at an alarming rate. Out of the existing sources of renewable energies, solar energy has been very popular due to obvious abundance and convenience. The predominant use of electrical energy is heating, ventilation and air conditioning in residential and industrial sector. Single phase induction motor is widely used for such low-power appliances like pumps, compressors, agriculture equipment’s and blowers. In order to avoid losses and low-starting torque, we intend to use the single-phase induction motor as an asymmetrical two-phase induction motor, which will run on a two-phase supply yielding better efficiency, speed control and power factor. If a three-phase supply is available, Scott-T transformer can be used to get two-phase supply. However, if there is only single-phase supply available, two-phase inverter with Sine Pulse Width Modulation (SPWM) technique can be used. This paper presents the method for two-phase supply using the 3-leg voltage source inverter (VSI) which is used to supply asymmetrical and symmetrical two-phase induction motor. The 16 bit microcontroller dsPIC is used for SPWM signal generation. Citation:  Umredkar, S. V., Junghare, A., and Renge, M. (2018). Operation of Symmetrical and Asymmetrical Two-Phase Induction Motor by Using 3-Leg Voltage Source Inverter. Trends in Renewable Energy, 4, 64-76. DOI: 10.17737/tre.2018.4.3.0057
Highlights
Single-phase induction motor is the most widely used motor in home appliances, agricultural equipment, pumps, compressors, blowers and industries for low-power applications. This motor is widely adopted for domestic applications because it uses single-phase AC source with constant frequency which is available. It is used with great advantages, but its performance is menial compared to the poly-phase induction motor due to low-rated power, zero starting torque and high torque harmonics [1, 2]
This paper presents the method to get two-phase supply using the 3-leg voltage source inverter (VSI), which is used to power asymmetrical and symmetrical two-phase induction motor
Two-Leg Voltage Source Inverter The two-leg two-phase inverter connected to two-phase Induction Motor, it consists of 4 switches with 2-leg inverter and center tapped capacitor supplied with DC supply [11, 12]
Summary
Single-phase induction motor is the most widely used motor in home appliances, agricultural equipment, pumps, compressors, blowers and industries for low-power applications. The 3leg voltage source inverter is used to convert DC to two-phase AC supply. Two-Leg Voltage Source Inverter The two-leg two-phase inverter connected to two-phase Induction Motor, it consists of 4 switches with 2-leg inverter and center tapped capacitor supplied with DC supply [11, 12]. Main winding and auxiliary winding of two-phase induction motor are fed from two legs of two-phase voltage source inverter. The output voltage obtained at phases of two-phase induction motor in case of 2-leg inverter is lower, which results in lower efficiency of motor.
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