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Three-phase AC motor control device

A technology of three-phase AC and control devices, which is applied in the direction of deceleration devices of AC motors, starters of single multi-phase induction motors, motor generators/starters, etc., which can solve the problems of high cost of use, complex structure, and poor speed regulation effect Ideal and other issues, to achieve the effect of low cost, simple operation, and adjustable time

Inactive Publication Date: 2017-02-15
蓝汉才
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing three-phase AC motor start and stop control devices, in order to reduce the starting current and make the motor accelerate and decelerate smoothly, mostly use star and delta conversion start, autotransformer start, frequency conversion speed control device and winding speed control motor speed control and other methods, but the above-mentioned methods or complex structures are expensive to use, or the speed regulation effect is not ideal

Method used

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Embodiment Construction

[0008] The present invention provides a kind of three-phase AC motor control device, in figure 1 In the schematic diagram of the control circuit structure of the motor acceleration, start, deceleration and stop control device shown, the A phase and C phase of the power supply are connected to the fuses RT1 and RT2, the stop button TA and the start button QA are connected in series, one end is connected to the fuse RT1, and the other end is connected to the time relay The delay disconnection contact SJ5.2 is connected, the intermediate relay coil ZJ1.1, the indicator light XHD1, and the time relay coil SJ1.1 are connected in parallel, and one end is connected with the parallel time relay SJ5.2, and the other end is connected with the fuse RT2; The two ends of the normally open contact ZJ1.3 of the relay are connected with the two ends of the start button QA; the delay closing contact SJ1.2 of the time relay and the delay opening contact SJ6.2 of the time relay are connected in s...

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Abstract

A three-phase AC motor control device belongs to the motor equipment control device technology field, and comprises button switches, time relays, intermediate relays, indicating lamps and AC contactors. A stop button and a starting button are connected in series, one end of the series connected structure is connected with a fuse, and the other end is connected with a time delay disconnection contact of one time relay. One intermediate relay coil, one indicating lamp and one time relay coil are connected in parallel, and then one end of the parallel connected structure is connected with one time relay, and the other end is connected with one fuse. After being connected in parallel, the time relay coils are in series connection with a deceleration switch, one end of the above circuit is connected with one end of the starting button, and the other end is connected with one fuse. The normally open contacts of five sets of intermediate relays are in series connection with AC contactor coils, then the five series connected branches are connected in parallel and then are connected with the two ends of a powers supply. The device is low in cost and is simple to operate, a motor starting current is small, and the time of the acceleration and deceleration processes can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of motor equipment control devices, in particular to a start-stop control device for a three-phase AC motor. Background technique [0002] The existing three-phase AC motor start and stop control devices, in order to reduce the starting current and make the motor accelerate and decelerate smoothly, mostly use star and delta conversion start, autotransformer start, frequency conversion speed control device and winding speed control motor speed control and other methods, but the above-mentioned method or complex structure is expensive to use, or the speed regulation effect is not ideal. Contents of the invention [0003] The invention provides a three-phase AC motor control device, which is characterized in that: in the control circuit, phase A and phase C of the power supply are respectively connected to fuses RT1 and RT2, the stop button TA and the start button QA are connected in series, and one end is co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/34H02P3/22
Inventor 蓝汉才
Owner 蓝汉才
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