ROCKET ELECTRIC MOTOR Russian patent published in 2004 - IPC

FIELD: development of electric motors for rockets. SUBSTANCE: proposed rocket motor, like known motors of homogeneous plasma discharge type (stationary plasma motors), has ultrasonic nozzles, magnetohydrodynamic accelerator channel disposed in cylindrical cavity between coaxial magnetic circuit poles, and magnetic field coil connected to emf source. As distinct from stationary plasma motor, proposed motor uses heterogeneous gas-plasma stream as working medium. For producing plasma heterogeneities in the form of plasma rings motor is provided with high-frequency pulse voltage supply connected to additional coil installed at accelerator channel inlet. Discharge is maintained in plasma rings inductively coupled with magnetic field coil by means of ac emf source connected to coil. Radial dielectric ribs are installed at motor diffuser inlet to interrupt current in plasma rings at moment of their exit from magnetohydrodynamic accelerator channel. EFFECT: enhanced thrust and operating time of motor. 1 cl, 1 dwg