Phase change control device and control method of variable-capacitance linear electrostatic motor

Abstract

The invention discloses a phase change control device of a variable-capacitance linear electrostatic motor. The phase change control device comprises a driving power supply, a current detection circuit, an integrator and a single-chip microcomputer, wherein the driving power supply is connected with the electrostatic motor and is used for outputting a three-phase driving signal so as to drive a rotor to slide; the current detection circuit is used for detecting the current data flowing through the electrostatic motor and transmitting the current data to the integrator; the integrator is used for integrating the current data to obtain electric quantity and transmitting the electric quantity to the single-chip microcomputer; and when the single-chip microcomputer judges that the absolute value of the electric quantity reaches the maximum, the motor is controlled to change phase. The invention further discloses a phase change control method of the variable-capacitance linear electrostaticmotor. The phase change control method comprises the following steps that firstly, the current data flowing through the electrostatic motor is acquired, and the electric quantity is obtained; and then the electrostatic motor is controlled to change phase at the moment when the maximum of the absolute value of the electric quantity is reached. According to the technical scheme, the phase change electrifying time of the variable-capacitance linear electrostatic motor can be shortened, the phase change frequency and the movement speed are increased, and the electrostatic motor can keep running stably for a long time.

Description

technical field

[0001] The invention relates to a device and method for controlling the commutation of an electrostatic motor and detecting the position of a mover by using a current detector and an integrator. Background technique

[0002] A linear electrostatic motor is a synchronous motor that consists of a single slider and a single stator to produce linear motion. Electrostatic motors can generate greater power and force than electromagnetic motors of the same size, an advantage that allows them to be used in many cutting-edge high-performance electromechanical systems. In order to reduce the friction between the slider and the stator, the oily medium and micron beads filled in make the phase stability margin of the control loop very low, and the motor is prone to out of step. When open-loop control is used, the control circuit is simple, but at the same time, in order to ensure that the motor reaches a balanced state, it results in long power-on time, low commutation ...

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