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Device and method for controlling four motors with few cables and in double remote control mode

A technology of electric motor and double remote control, which is applied in the direction of controlling multiple AC motors, can solve the problems of construction difficulty, construction cost increase, and new system failure, so as to save material cost and construction cost, improve safety factor, and reduce equipment failure rate effect

Active Publication Date: 2014-07-30
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 will greatly increase the construction difficulty and construction cost, and also add new system failures

Method used

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  • Device and method for controlling four motors with few cables and in double remote control mode

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Embodiment Construction

[0039] The device of the present invention is composed of a main control box 1, a sub-control box 2, a main remote control receiver, a sub-remote control receiver and a three-phase asynchronous motor M.

[0040]The input ends of the three fuses E1, E2, and E3 inside the main control box 1 are connected to the live wires L1, L2, and L3 of the three-phase four-wire system power line, and the output ends of the three fuses E1, E2, and E3 are connected to the live wires L1 / 1. L2 / 1, L3 / 1; four automatic switches QF1, QF2, QF3, QF4 use wires and connect them to the three-phase live wires L1 / 1, L2 / 1, L3 / 1; the output line of the automatic switch QF1 is three-phase Power lines 1L1, 1L2, 1L3; automatic switch QF2 output lines are three-phase power lines 2L1, 2L2, 2L3; automatic switch QF3 output lines are three-phase power lines 3L1, 3L2, 3L3; automatic switch QF4 output lines are three-phase power lines 4L1, 4L2, 4L3; automatic switch QF1 three-phase power live wire 1L1 and live wire...

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Abstract

The invention provides a device and a method for controlling four motors with few cables and in a double remote control mode. The device consists of a main control box, a secondary control box, a remote control device and a three-phase asynchronous motor, wherein the main control box comprises a fuse protector E, an automatic switch QF, alternating current contactors KM, a three-phase four-wire system live wire L and a three-phase four-wire system null line N; the secondary control box 2 comprises a contactor KM, a three-phase four-wire system live wire L and a three-phase four-wire system null line N; the alternating current contactors KM in the main control box and the secondary control box are controlled by a main remote-control receiver and a secondary remote-control receiver respectively; and the main control box 1 and the secondary control box 2 are connected through a four-core cable. The device is applicable to load of electric cranes, remote pumps, remote fans and the like, effectively improves the operation condition of equipment and the work environment of maintainers, reduces equipment failure rate, increases the safety coefficient of the maintainers, avoids use of a large number of cables and an expensive cable pulley, and greatly saves material cost and construction cost.

Description

technical field [0001] The invention belongs to the field of automatic control, and in particular relates to a device and a method for controlling four electric motors with dual remote control and few wires for equipment such as electric cranes, remote pumps and fans. Background technique [0002] In the industrial and military fields, some electrical control components used in equipment such as electric cranes, remote pumps and fans are often located in locations with harsh environments and complex terrain. [0003] In such an environment, electrical equipment has more failures and shorter lifespan due to vibration, dust, humidity, and acid corrosion; if the equipment is repaired in these places, people will be in an unsafe state. [0004] 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 the electrical equipment that controls these ...

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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