STARTER DEVICE FOR AC CONTACTLESS ELECTRIC MOTOR Russian patent published in 2012 - IPC H02P1/44 

FIELD: electricity.

SUBSTANCE: starter device has a transformer unit for the rotor rotation EMP allocation, the first unit for shaping pulses in-phase with each semi-period of the rotor rotation EMP, the second unit for shaping pulses in-phase with each semi-period of feeding voltage, a unit of boolean summation multiplying the pulses of same name shift of the outputs of the first and the second pulse shaping units; the resultant pulses from the logical summator output are supplied to the AC power tongs input. The rotor initial start-up (prior to counter-EMP origination); pulses from the maximum frequency generator affect the trigger strobing output; further speed0up and synchronous operation of the electric motor are due to the effect of counter-EMP via the trigger asynchronous inputs.

EFFECT: contactless electric motors application field extension, increase of performance factor, cosφ, reduction of weight and dimension indicators.

3 dwg