Kinerja Pengoperasian Motor Induksi 3-Fase Pada Sistem Tenaga 1-Fase Dengan Menggunakan Kapasitor

In many rural areas where only single-phase power is available from the local utility, operation of induction motors that drive large loads can be a problem. For loads up to about 20 hp, single-phase induction motors can be used with easily. For larger loads, the single-phase induction motors required a specific designed starting windings and control circuits. Such induction motors are often considerably higher in cost than the equivalent 3-phase induction motorsand is usually more economical and more efficient to use a 3-phase induction motor even if it must be supplied with a single-phase source. One way to do this is to connect capacitors at the winding circuits across the terminal of the induction motors. The data of induction motor used was 1.5 kW three-phase induction motor, 220/380 V/Y6.2/3.6 A50 Hz1400 rpmB class0.84 power factor with 4 poles of _stator using capacitor on one-phase power supply. The performance of induction motor was analyzed based on the output power Vs input current, power factor, efficiency, network output torque, and the rising of temperature of the stator\u27s winding. The method used in this research was focused on the reactive power of the three-phase induction motor and current densities within each winding. The experimental results showed that the three-phase induction motor used could be operated well on one-phase power supply using 128,21pF of capacitor with the output power of 726.26 W, 0.961 leading power factor, input current 5.2 A, network output torque 5.3 N-m, efficiency 66%, rotor speed 1310 rpm and winding temperature 82.1 CC. So the induction motor could be operated safely according to the IEC and NEMA standards. Keywords : capacitor circuit, reactive power of three-phase induction motor, current densities