ASYNCHRONOUS VALVE CASCADE Russian patent published in 2013 - IPC H02P27/04 

FIELD: electricity.

SUBSTANCE: this proposed device comprises an asynchronous motor with a phase rotor, sensors of phase currents of a stator, an inverter of stator voltage, sensors of phase currents of a rotor, a three-phase diode rectifier of a rotor, a throttle, a sensor of rectified rotor current, a semiconductor switch, an isolating diode, a three-phase diode rectifier of a stator, a capacitor of a link of stator DC, a relay controller of rectified rotor current, a unit of generation of setting of rectified rotor current, a speed controller, a unit of relay controllers of phase currents of a stator, a unit of generation of harmonic signals of settings for phase currents of a stator, a unit of limitation of a minimum value, a summator, a unit of generation of a stator current amplitude setting, a unit of multiplication by a coefficient where p_n - a number of pairs of electric motor poles, a unit of sign identification, a multiplication unit, a unit of rotor rotation speed calculation, a unit of rotor current frequency calculation. Connection of specified units is made in accordance with application materials.

EFFECT: development of an electric drive based on an asynchronous valve cascade making it possible to control speed of rotor rotation in a wide range without a speed sensor on an electric motor shaft with provision of high start-up torques and high overloading capacity, and having high energy indices.

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