Electronic switching circuit

Abstract

The invention provides an electronic switching circuit which adopts a triode or an MOS pipe as a switch and achieves a contactor function through reasonable design of a switching voltage, and the electronic switching circuit is applied to control of a motor switch. The electronic switching circuit is simple in structure, and compared with a conventional contactor, the electronic switching circuit is small in volume and high in security.

Description

technical field [0001] The invention relates to a circuit electronic switch circuit, especially suitable for a switch in a motor controller. Background technique [0002] As a high-current / high-voltage control switch, contactors are often used in electrical appliances that frequently switch on and off AC and DC main circuits and large-capacity control circuits over a long distance. Its main control object is the motor, which can realize the safety switch control of high-power motors. Most of the existing contactors are of mechanical structure, the electromagnetic operating mechanism is installed in the insulating plastic shell, the attracting coil is sleeved on the iron core, and the movable armature drives the moving contact through the insulating contact bracket. When the attraction coil is not energized, the armature is released under the action of the spring and the main contacts are disconnected. When the attraction coil is energized, the armature attracts to the iron...

AI Technical Summary

Problems solved by technology

Motor controllers for vehicles generally have strict requirements on volume to adapt to the design of the installation space in the vehicle. However, existing contactors must occupy a certain amount of space due to the need for inherent components such as operating mechanisms, pure rings, and armatures. The design of the controller is limited, and the installation of the existing contactor is complicated, which affects the production efficiency

[0004] 2. The power supply coil of the contactor needs to maintain a large current, which increases the power consumed by the controller, and the coil generates serious heat, which increases the operating temperature of the controller and shortens the life of the controller and contactor

[0005] 3. The contacts of the contactor are easy to oxidize. Even if the contacts are sealed, it is easy to draw arcs when the contactor is closed or disconnected, which will also carbonize the contacts, increase the contact resistance, and shorten the life of the contactor.

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