Permanent Split Capacitor (Capacitor Run) AC Induction Motor

A permanent split capacitor (PSC) motor has a run type capacitor. This capacitor is permanently connected in series with the start winding. This will cause the start winding an auxiliary winding once the motor reached the running speed. It cannot provide the starting boost of a starting capacitor since the run capacitor must be designed for continuous use. PSC motor […]

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Capacitor Start AC Induction Motor

Modified split-phase motor with a capacitor in series with the start winding to provide a start “boost” is shown below. The capacitor start motor also has a centrifugal switch like the split-phase motor which disconnects the start winding and the capacitor when the motor reaches about 75% of the rated speed. It creates more starting torque, typically 200% to 400% […]

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FET Switch: A Voltage-Controlled Analog Switch

This is a JFET switch circuit.This circuit uses a MPF102 JFET transistor. In this circuit, the JFET is symmetrical, so the input can be source or drain. The MPF102 is used because this transistor has gate’s reverse breakdown voltage of greater than 25 and in order DSG. The supply of this circuit is ±12V since the maximum gate’s reverse breakdown […]

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