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Automatic alternating control system for two motors

A control system and motor technology, applied in motor generator control, AC motor control, control system, etc., can solve problems such as increasing labor intensity of personnel, and achieve the effects of reducing damage and forgetting to switch motors, reducing wear and prolonging maintenance cycles.

Pending Publication Date: 2022-01-14
青海引大济湟工程综合开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some special equipment and important areas of water supply, heating, high and low pressure air compressors, mine main ventilation equipment axial fans, fire pump booster motors, hydraulic device oil pumps, etc., all use two or more motors to operate alternately , the control wiring is complicated and requires high personnel. In order to make the motor wear evenly, regular manual switching is usually used. This method virtually increases the labor intensity of the personnel.

Method used

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  • Automatic alternating control system for two motors
  • Automatic alternating control system for two motors
  • Automatic alternating control system for two motors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Please refer to the attached Figure 1-4 , a two-motor automatic rotation control system of the present invention, the system includes a main circuit 1, a control circuit 2, a first check valve 3, a second check valve 4, a water collection well 5, a control box 6, and a #1 water pump 7 and 2# water pump 8; where,

[0044] The main circuit 1 is composed of motor D1, motor D2, thermal relay FR1, thermal relay FR2, AC contactor KM1, AC contactor KM2, fuse FU1, fuse FU2, fuse FU3, main power switch QF; The three live wires L1, L2, and L3 are respectively connected to each terminal. The three live wires L1, L2, and L3 between the motor D1 and the main power switch QF are sequentially connected in series with a thermal relay FR1, an AC contactor KM1, a fuse FU1, and a fuse. FU2, fuse FU3; the three terminals of motor D2 are respectively connected in parallel on the three live wires L1, L2, L3 between fuse FU1, fuse FU2, fuse FU3 and AC contactor KM1, and the three live wires...

Embodiment 2

[0068] Based on Example 1, as attached Figure 1-4 , the system works as follows:

[0069] When the two water pumps draining water in the sump 5 are turned off, LD1 lights up, indicating the shutdown state. When it needs to run, close the power switch QF, QF1, the main circuit and the control circuit have been electrified, and turn the manual and automatic transfer switch from the SA "stop" position to the "automatic" position. The conduction of each contact of the transfer switch SA is 1-2, 3-4, 7-8, 9-10, 13-14, 15-16. At this time, the liquid level relay YJ1 that monitors the upper limit of the liquid level detects that the actual water level has reached the upper limit setting value, the liquid level relay YJ1 acts, the relay K1 that starts the 1# water pump 7 is energized, and the normally open contact of the relay K1 receives the current. The 1-2 contacts of the transfer switch SA pass through the normally closed contacts of the rotation relay K3, so that the 1# water ...

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Abstract

The invention belongs to the technical field of automatic control and relates to an automatic alternating control system for two motors. The system comprises a main circuit, a control loop, a first check valve, a second check valve, a water collecting well, a control box, a first water pump and a second water pump. According to the automatic alternating control system for the two motors, the two or more motors are fully made to work according to a pre-designed sequence and number of times, abrasion of the motor water pumps is reduced to the minimum, meanwhile, the overhaul period is prolonged, and the reliability, continuity and stability of water supply are improved. In addition, the phenomena that the motors are damaged and are not switched due to the negligence of a worker, the abrasion of the motors is aggravated, and the maintenance period of the motors is shortened due to the fact that the worker switches a SA change-over switch back and forth, are reduced.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to an automatic rotation control system for two motors. Background technique [0002] With the rapid development of society, the use of electric motors is becoming more and more extensive. The Harmony EMU independently developed by my country, the prime mover is a special high-voltage motor, the elevator used by high-rise residents, the water supply pump, the car, the milling, the planer, the grinding machine, the hydraulic press, the blower, the induced draft fan, the servo motor, the stepper motor, etc. etc., are inseparable from the figure of the motor. [0003] The use of large-scale motors, their control methods and power supply methods are also emerging in an endless stream. Among them, the power supply method can be divided into two types: DC power supply and AC power supply. The control method can be designed according to the purpose and the motor itself. It is m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/18H02P1/58H02P3/18H02H7/08
CPCH02P25/18H02P1/58H02P3/18H02H7/0833
Inventor 王熠金辰杰
Owner 青海引大济湟工程综合开发有限责任公司
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