Design of a Two Phase Inverter for a Specific Two Phase Induction Motor Through MATLAB Simulation
In this paper operation of two phase VSI supplying a two phase balanced cage induction motor is simulated using MATLAB simulation. The concept of switching function is used for simulation of balanced two phase motor for the first time. The simulation resu
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Design of a Two Phase Inverter for a Specific Two Phase Induction Motor Through MATLAB Simulation A. Y. Fadnis, R. M. Mohoril, D. R. Tutakne and Gaurav Gondhalekar
Abstract In this paper operation of two phase VSI supplying a two phase balanced cage induction motor is simulated using MATLAB simulation. The concept of switching function is used for simulation of balanced two phase motor for the first time. The simulation results give information regarding the voltages and currents of the various switches of the inverter have to withstand and hence help in choosing components with proper ratings for a specific motor for a two phase motor drive. Keywords Two phase inverter switching function
Sinusoidal
pulse width modulation (SPWM)
64.1 Introduction The operation of three phase voltage source inverters for supplying three phase motors is widely studied.[1, 2].The use of switching functions for the simulation studies of inverters is explained and implemented by Lee and Ehasani [2]. It is A. Y. Fadnis (&) R. M. Mohoril G. Gondhalekar Department of Electrical Engineering, Y.C.C.E, Wanadongri, Nagpur, India e-mail: [email protected] R. M. Mohoril e-mail: [email protected] G. Gondhalekar e-mail: [email protected] D. R. Tutakne Department of Electrical Engineering, S.R.K.N.E.C, Nagpur, India e-mail: [email protected]
V. V. Das (ed.), Proceedings of the Third International Conference on Trends in Information, Telecommunication and Computing, Lecture Notes in Electrical Engineering 150, DOI: 10.1007/978-1-4614-3363-7_64, Ó Springer Science+Business Media New York 2013
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Fig. 64.1 The system used for simulation
Iin IS1 Vdc /2
IS2
alpha 2 phase IM
2
1 A
O Vdc /2
B 3
4
N
Beta
however to be appreciated that like three phase cage type induction motors, two phase balanced cage type induction motors are also used in association of the appropriate two phase VSIs [3, 4].
64.1.1 Simulated System The simulated system is shown in Fig. 64.1. The circuit used is a H bridge inverter. It consists of four switches and a centre—tapped d.c. link supplied by a diode rectifier The circuit also shows the two phase symmetrical motor with two windings a and b. The two windings are arranged spatially at 90° electrical on the stator. Two terminals of the two windings are connected at point N which is connected to O. The switches are operated in a sequence decided by sinusoidal pulse width modulation (SPWM). The sequential operation of switches give rise to two voltages 90° electrically apart. The carrier frequency for SPWM is 1 kHz, modulation index is 8, input voltage = 300 V and the load is a series combination of R = 3.87X and L = 20 mH.
64.1.2 Simulation of the Output Voltage of the Inverter In the simulation implemented in this paper, switches are not simulated as physical switches but as transfer functions which process the input voltages into output voltages just as physical switches do. A switching function is like transfer function such that Vout ¼ ½SF Vin
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