Total pressure (direct) motor start control circuit
A starting control and circuit technology, applied in the direction of motor generator/starter, single multi-phase induction motor starter, etc., can solve the problem of damage to the motor full-voltage starting control device, etc., and achieve the increase and decrease of the area of the arc extinguishing chamber. Power consumption, solving the effect of fragile
Inactive Publication Date: 2008-02-13
冯德义
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[0003] The purpose of the present invention is to provide a full-voltage motor starting control circuit, which implements the parallel connection of contactor A1 and contactor A2, mainly to overcome the problem that the contactor contact of the starting control is caused by a relatively large starting current when the motor is started at full voltage. The disadvantages brought about by this method solve the problem of damage to the full-voltage starting control device of the motor; the proposed full-voltage starting control circuit not only maintains the technical characteristics of the full-voltage starting of the motor, but also has the effect characteristics of step-down starting; the full-voltage starting control circuit of the motor It has the characteristics of power saving and standby function, and is simple in structure, easy to maintain, safe and reliable
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[0017] The following specific embodiments are listed in conjunction with the accompanying drawings to further illustrate the technical solution of the present invention.
[0018] In an embodiment of the present invention, a full-voltage motor starting control circuit is shown in FIG. 1 . The full-voltage motor start control circuit is composed of stop button TA, start button QA, switch HK, contactor A1 and contactor A2. One end of the stop button TA is connected to the power supply VA, and the other end of the stop button TA is connected to the start button QA. The other end of the start button QA is connected to one end of the parallel contactor A1 and contactor A2, the auxiliary contact A1-2 of the contactor A1 is connected in parallel with the two ends of the start button QA, and the auxiliary contact A2 of the contactor A2 -2 is also connected in parallel with the two ends of the start button QA, the other end of the contactor A2 is connected in series with the switch HK, ...
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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 motor starting control circuit, mainly a full-voltage 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 contactor, which may easil...
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IPC IPC(8): H02P1/26
Inventor 冯德义
Owner 冯德义