Method of powering a single-phase electric motor and a power supply system for implementing such a method
AssigneeMoteurs Leroy-Somer
InventorAli Makki
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Abstract
The present invention relates to a method of powering a single-phase asynchronous electric motor, comprising first and second windings, in which method one of the windings is powered by AC mains while the other winding is powered by an inverter that receives a rectified voltage from the mains and that is controlled in such a manner that said second winding is powered with a voltage of waveform that is offset relative to that from the mains.
Claims22
A method of powering a single-phase asynchronous electric motor, comprising first and second windings, wherein one of the windings is powered by AC mains while the other winding is powered by an inverter that receives a rectified voltage from the mains and that is controlled in such a manner that said second winding is powered with a voltage of waveform that is offset relative to that from the mains.
A power supply system for a single-phase asynchronous electric motor having first and second windings, the system comprising:
- an input connected to an alternating mains network;
- a first output connected to the input of the system and for connection to the first winding of the motor;
- a second output for connection to a second winding of the motor;
- an inverter connected to the input of the system via a rectifier and connected to the second output;
- and
- an inverter control unit configured to act on the operation of the inverter in such a manner that the voltage waveform delivered by the inverter to the second output is offset by a phase of magnitude that is predefined relative to the mains voltage waveform, the phase offset preferably being equal to 90° electrical, at least on starting the motor.
Dependencies are inferred from the claim text.