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Time sequence single-phase-control three-unit three-phase asynchronous motor device and method thereof

A three-phase asynchronous, electric motor technology, applied in the direction of controlling multiple AC motors, can solve the problems of construction difficulty and cost increase, new system failures, etc., to save material costs and construction costs, reduce equipment failure rate, and improve operation conditional effect

Active Publication Date: 2014-09-03
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These newly added power cables greatly increase the difficulty and cost of construction, and also add new system failures

Method used

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  • Time sequence single-phase-control three-unit three-phase asynchronous motor device and method thereof

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Effect test

Embodiment Construction

[0035] The time-sequential single-phase control device for three three-phase asynchronous motors of the present invention is composed of a main control box 1, an auxiliary control box 2 and a three-phase asynchronous motor M.

[0036] The main control box 1 includes a control unit, a fuse E, an automatic switch QF, a contactor KM and a three-phase four-wire power line.

[0037] The auxiliary control box 2 includes a contactor KM and a three-phase four-wire system power line.

[0038]The three fuses E1, E2 and E3 in the main control box 1 are connected to the incoming side of the live wires L1, L2 and L3 of the three-phase four-wire system power line, and the live wires at the output terminals of the three fuses E1, E2 and E3 are in turn L1 / 1, L2 / 1, L3 / 1; automatic switches QF1, QF2, QF3 are respectively connected to three-phase live wires L1 / 1, L2 / 1, L3 / 1 through wires; the output line of automatic switch QF1 is a three-phase power line 1L1, 1L2, 1L3; automatic switch QF2 ou...

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PUM

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Abstract

The invention provides a sequence single-phase control device for three three-phase asynchronous motors and its method, which consists of a main control box, a sub-control box and a three-phase asynchronous motor. Device E, automatic switch QF, AC contactor KM and three-phase four-wire power cord; the sub-control box includes AC contactor KM and three-phase four-wire power cord. The forward and reverse interlock of the motor is realized through the main contact or auxiliary contact of the AC contactor, and the interlock between the motor and the motor. The invention is suitable for use on loads such as electric cranes, remote pumps and fans, and can effectively improve the operating conditions of equipment and the working environment of maintenance personnel, reduce the failure rate of equipment, reduce the safety accident rate of maintenance personnel, and avoid the use of a large number of cables And expensive cable pulleys, greatly saving material costs and construction costs.

Description

technical field [0001] The invention belongs to the field of automatic control devices, and in particular relates to a device and method for sequential single-phase control of three three-phase asynchronous motors used in the control fields of electric cranes, remote pumps and fans. Background technique [0002] In the industrial, military and civil fields, some electrical components such as electric cranes, remote pumps and fans are located in locations with harsh environments and complex terrains. In such an environment, electrical equipment has more failures and shorter lifespan due to vibration, dust, air humidity, corrosion and other reasons; if the equipment is repaired in these places, people will be in an unsafe state. [0003] In order to reduce the failure rate of electrical equipment, increase the service life of electrical equipment, and create a safe environment for maintenance personnel, it is necessary to move most of the electrical equipment that controls the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P5/74
Inventor 杜茂庆刘海
Owner ANGANG STEEL CO LTD
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