Optimization of the rotor surface resistance of the asynchronous electrostatic motor

For an electrostatic motor consisting of a rotor of insulating material covered with a slightly conducting surface layer, and a ring of electrodes fed with phase-shifted ac voltages that generate a rotating electric field acting on the rotor, the maximum torque on the rotor and the corresponding surface resistance are determined theoretically under the condition that the amplitude of the ac voltages on the electrodes is constant.