DOUBLE SPEED SINGLE PHASE ALTERNATING CURRENT MOTOR.

摘要

A double speed single phase alternating current motor includes a stator, a rotor, and an electronic starting circuit. The coil winding of the stator includes a starting winding (L0), a first main winding (L1), and a second main winding (L2). The electronic starting circuit includes a rectifying and voltage regulating circuit, a detecting circuit, a voltage comparator circuit, a first electronic switching circuit (10) connected in series with the first main winding (L1), a second electronic switching circuit (20) connected in series with the second main winding (L2), and a third electronic switching circuit (30) connected in series with the starting winding (L0) and a starting capacitor (C0). The first electronic switching circuit (10) and the third electronic switching circuit (30) are interlocked with the second electronic switching circuit (20). When the first electronic switching circuit (10) and the third electronic switching circuit (30) are switched on, the second electronic switching circuit (20) is switched off, so that the first main winding (L1) and the starting winding (L0) are connected with a power supply to operate and the second main winding (L2) stops operating, and vice versa. The double speed single phase alternating current motor can enable pole-changing and speed-regulating control from 4 poles to 6 poles, is accurate in control, is convenient in operation, and is stable during working.