Three-phase linear electrostatic motor and control method

Abstract

The invention discloses a three-phase linear electrostatic motor and a control method. The motor comprises a stator plate, a rotor plate, adrive circuit and a power supply. Insulating liquid is filledbetween the stator plate and the rotor plate; a plurality of copper electrodes are etched on the surfaces of the stator plate and the rotor plate; the number of the electrodes on the stator plate islarger than that of the electrodes on the rotor plate; three-phase square wave driving voltage is applied to the electrodes of the stator plate; and steady and constant driving voltage is applied to the electrodes of the rotor plate. Compared with a magneto-electric motor, the linear electrostatic motor is not provided with a magnet exciting coil, so that the size can be greatly reduced, and the loss to be overcome is correspondingly reduced; as a power module of a micro machine, the electrostatic motor can play its own advantages and can be widely applied to various fine and complex environments. According to a square wave control-based driving method, the electrostatic motor has good performance at a low speed, and the running speed and the commutation speed of the motor are improved.

Description

technical field [0001] The invention relates to a three-phase linear electrostatic motor, in particular to a double-excitation three-phase linear electrostatic motor controlled by square wave voltage. Background technique [0002] An electrostatic motor is an energy conversion device that uses static electricity as an energy source. With the development of modern production, there is an increasingly strong demand for non-magnetic miniaturized motors, especially in the aerospace field. Electrostatic forces are more attractive and promising than magnetic forces for micromechanical systems. Despite years of research history, electrostatic motors are rarely used in practice due to the high voltage and high mechanical precision required. Compared with the magnetoelectric motor, the electrostatic motor has no excitation coil, and the loss to be overcome is correspondingly reduced. At the same time, the electrostatic force is inversely proportional to the square of the size, and...

AI Technical Summary

Problems solved by technology

Although the thrust of the motor can reach tens of newtons and its moving speed exceeds 1m / s, the structure of the motor requires a large number of power supply phases, and the AC signal is used for power supply, which increases the complexity and size of the driving power supply and reduces the size of the motor. output force

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