Speed control of 3 phase induction motor using an RC circuit as a start signal

rcoming Resistance of the initial condition in three-phase electric motors is essential in applications where it’s had high initial consumption demand, such as HVAC Systems, pumps or compressors, higher torque ensures reliable operation even under varying conditions of load. These motors can provide efficient operation for heavy loads or when starting under load conditions. In this work an RC circuit is used for starting signal of a 3-phase induction motor, advantages of using an RC circuit against a conventional variable frequency controller are shown in the article