Single Phase Motor Energy Economizer for Regulating the Use of Electricity

摘要

A system for controlling power from an AC voltage to an induction motor to reduce surge when power is restored to a power grid is disclosed including, a device for switching power to the induction motor that has a trigger controllable to enable the device to provide a variable amount of power to the induction motor. The system includes a second device for measuring the AC voltage at the source to determine when power is available, hence determining when the AC voltage is within operating range. Responsive to the AC voltage coming within operating range, the system delays for a time period then initiates power to the induction motor by controlling the device for switching power.

主权项

1. A system for controlling power from an AC voltage to an induction motor, the system comprising:
means for switching power to the induction motor, the means for switching power including a trigger, the trigger controllable to enable the means for switching at a point within a half-cycle of a waveform of the AC voltage based upon a trigger delay, whereas a full power is supplied to the induction motor when the trigger delay is zero; means for measuring the AC voltage at the source; means for determining when the AC voltage is within operating range; and responsive to the AC voltage being within operating range, the system delays for a time period then initiates power to the induction motor using the means for switching power.