Double speed motor soft starter and control method thereof
A technology of a two-speed motor and control method, which is applied to the starter, motor generator/starter, etc. of a single multi-phase induction motor, can solve complex problems and achieve the effect of soft stop
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[0018] Such as Figure 1-3 As shown, the input end of the soft starter of the two-speed motor soft start circuit is connected to the power supply, the output end is connected to the motor, and the output end is the power supply circuit and is equipped with a contactor KM1 that controls the on-off of the circuit. The soft starter and the motor are connected through a contact The line of the KM3 and the power supply line form a star connection, that is, when the contactors KM1 and KM3 are closed, the star connection is in the low-speed mode; the soft starter and the motor pass through the line containing the contactor KM2 and the power supply line It forms a delta connection, that is, when KM1 and KM2 are closed, it is a delta connection. At this time, it is a high-speed mode; the control unit of the soft starter controls the binary input contacts K1 and K2 respectively as needed to control the soft-start and low-speed motors. Soft stop operation.
[0019] The soft starter does no...
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