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Total pressure (direct) motor start control circuit

A technology of starting control and step-down starting, applied in the direction of motor generator/starter, starter of a single multi-phase induction motor, etc., can solve the problem of damage to the full-voltage starting control device of the motor, and increase the area of ​​the arc extinguishing chamber. , Solve the effect of easy damage and improve reliability

Inactive Publication Date: 2006-10-11
冯德义
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to implement the parallel connection of A1 contactor and A2 contactor, and provide a full-voltage (direct) motor starting control circuit, mainly to overcome the contactor contact of starting control through a larger starting The shortcomings brought by the current solve the problem of damage to the motor's full-voltage starting control device; the proposed full-voltage (direct) starting control circuit not only maintains the technical characteristics of the motor's full-voltage starting, but also has the effect of reducing the voltage starting characteristics; The (direct) motor starting control circuit has the characteristics of power saving and standby function, and the structure is simple, easy to maintain, safe and reliable

Method used

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  • Total pressure (direct) motor start control circuit

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Embodiment Construction

[0014] The following specific embodiments are listed in conjunction with the accompanying drawings to further illustrate the technical solution of the present invention.

[0015] Embodiments of the present invention, such as figure 1 The full voltage (direct) motor starter control circuit shown. The full voltage (direct) motor starting control circuit is composed of TA stop button, QA start button, HK switch, A1 contactor and A2 contactor. The other end is connected to one end of the QA start button, the other end of the QA start button is connected to one end of the parallel A1 contactor and A2 contactor, A1 contactor auxiliary contact A1-2 and A2 contactor auxiliary contact A2- 2. Parallel connection with both ends of the QA start button, the other end of the A2 contactor is connected to the power supply VB by the HK switch and the other end of the A1 contactor, and the A1 contactor and A2 contactor control the motor start, which has full voltage (direct) start It has the ...

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Abstract

The disclosed full-voltage (direct) start-up control circuit for motor comprises: [TA] a stop button, [QA] a start-up button, [HK] a switch, and [A1] [A2] paralleled contactors. This product with enlarged arc-chute area has well arc extinction effect, has enough startup moment fit to reduced-voltage startup and large load, convenient to maintenance, and has wide application.

Description

technical field [0001] The invention relates to a full-voltage (direct) motor starting control circuit, mainly a full-voltage (direct) starting control circuit used in a motor control device. Background technique [0002] In the existing starting control devices for asynchronous motors, there are two modes: full-voltage starting and reduced-voltage starting. The full-voltage starting of the motor uses a knife switch or a contactor to control the starting of the motor. The full-voltage starting of the motor is used for starting the motor with a large power supply capacity. The starting current passed by the contactor contact in the starting control circuit is relatively large. The starting current of a standard asynchronous motor is about 4 to 7 times the rated current of the motor, and the starting current of a non-standard asynchronous motor is about 9 times the rated current of the motor. A large starting current is likely to cause adhesion of the contacts of the contacto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/26
Inventor 冯德义
Owner 冯德义
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