The starting method of the three-phase induction motor star-delta starter
A technology of induction motor and starting device, which is applied in the field of power electronics and electric transmission, can solve problems such as transient current peak exceeding, large surge current, and impulsive stator current, so as to reduce current impact, eliminate electromagnetic interference, Effect of reducing noise and vibration
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[0055] Such as figure 1 and figure 2 As shown, the induction motor star-delta starting device based on random solid state relays involved in the present invention includes a current and voltage detection unit, a single-chip microcomputer control unit, a human-computer interaction unit, a delta connection switching device based on solid state relays and AC contactors, Based on the solid state relay star connection switching device, main circuit AC contactor and thermal relay device, the current and voltage detection unit is connected to the bus for real-time detection of power supply current and power supply voltage signal, which is used as the basis for the trigger control of the single-chip microcomputer control unit; single-chip microcomputer The control unit is connected with the current and voltage detection unit. Through the analysis, calculation and judgment of the detection signal, the control of the diagonal switching device, the star connection switching device and t...
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