Energy-saving resonance type electric actuator

Abstract

The invention provides an energy-saving resonance type electric actuator. The energy-saving resonance type electric actuator comprises a casing, an excitation coil group, a leaf spring and a runner, wherein the casing is formed by connecting an upper end cover and a base, the excitation coil group comprises a bracket and coils wound on the bracket, the bracket is fixedly connected with an upper end cover, the runner is formed by connecting an internal yoke iron, an external yoke iron and a permanent magnet in series, the internal yoke iron, the external yoke iron and the permanent magnet are fixed on a guide shaft, the bracket is positioned in an air gap formed by the internal yoke iron and the external yoke iron, the internal yoke iron forms a sealed magnetic path with the permanent magnet and the external yoke iron, the guide shaft is installed between the upper end cover and the base by a bearing, and the external yoke iron is connected with the base by the leaf spring. The invention can output larger actuation force under the condition of low energy consumption and has compact structure and extensive engineering application prospect.

Description

technical field [0001] The invention relates to an actuator, in particular to an energy-saving resonant electric actuator. Background technique [0002] Electric actuators are widely used as vibration force sources. The electric actuator uses a coil with an alternating current to be subjected to the Lorentz force in a magnetic field to output external power. A general small electric actuator is a constant magnetic field generated by a permanent magnet, the moving coil is supported in a constant magnetic field by a spring, and the ejector rod and the moving coil are fixed together to form the moving parts of the actuator. The actual output force of this type of actuator is the difference between the electromagnetic force input to the moving coil and the inertial force of the moving part, and the inertial force increases with the square of the frequency of the electromagnetic force. When medium and high-frequency power is required, the electric actuator is realized by increa...

AI Technical Summary

Problems solved by technology

When medium and high-frequency power is required, the electric actuator is realized by increasing the electromagnetic force. Due to the inertial force of the mover in the power output link, the traditional electric actuator has low efficiency and consumes more energy. , and the actuator increases as the output power increases, and the size and weight of the actuator itself and the power amplifier increase sharply, which brings inconvenience to engineering applications

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