Voltage-boosting started alternating current electromagnet

Abstract

The invention discloses a voltage-boosting started alternating current electromagnet. The voltage-boosting started alternating current electromagnet comprises a normal alternating current electromagnet and an electronic unit, wherein the normal alternating current electromagnet consists of a movable iron core, a static iron core, a reset spring and an exciting coil; and the electronic unit 100 consists of a first energy storage circuit, a first switching circuit, a control circuit, a second switching circuit, a second energy storage circuit, a retaining circuit and a bridge circuit.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to an AC electromagnet which adopts an energy storage circuit and can be started by boosting with high efficiency and power saving. Background technique [0002] AC electromagnet is a low-voltage electrical appliance that is widely used. For example, AC electromagnetic contactor, AC electromagnetic valve, AC electromagnetic tractor, AC electromagnetic clutch, AC electromagnetic brake, AC electromagnetic sucker, AC electromagnetic crane, AC electromagnetic lock, AC electromagnetic punch, AC electromagnetic nail gun, AC electromagnetic masher, AC electromagnetic cutting machines, AC magnetic levitation trains, electromagnetic catapults and other equipment are equipped with AC electromagnets. [0003] figure 1 It is a schematic diagram of the working principle of a conventional AC electromagnet. This conventional AC electromagnet is mainly composed of a moving iron c...

AI Technical Summary

Problems solved by technology

[0010] 1. Unnecessary power consumption: As mentioned above, in the start-up and holding stages, the same AC voltage is passed through the excitation coil L of the conventional AC electromagnet, resulting in excessive holding power and unnecessary power loss;

[0011] 2. Heating: The evil result of unnecessary power loss is heating and heating. In severe cases, it will even burn the excitation coil L of the conventional AC electromagnet;

[0012] 3. Annoying AC noise

[0013] 4. After the AC voltage is turned on, the magnetic force generated by the exciting coil L is not strong enough, and the speed of the moving iron core M and the static iron core G is relatively slow.

[0014] 5. There is no freewheeling circuit, and the moment the AC voltage is cut off, it is easy to interfere with the external circuit

Images