Motor multi-head quickly switching device

A fast-switching, multi-head technology, applied to emergency protection circuit devices, motor speed or torque control, electrical components, etc., can solve the problems of large motor power consumption, non-adjustable speed, power waste, etc., to improve the power factor , reduce motor loss, reduce noise effect

Active Publication Date: 2012-07-04
ANHUI HUIDIAN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the motor generally operates at the rated power, its speed cannot be adjusted, the motor can only be in two states of on or off, even when the heat load is small, it must be turned on, and the power consumption of the motor is much greater than the actual load needs, resulting in unnecessary energy consumption
For example, when the actual load only needs the capacity of 1.2 motors to be sufficient, two motors must be turned on, so the power consumption of 0.8 motor capacity is wasted
In addition, there is a huge difference between the power consumption of large and medium-sized factories during peak hours and low peak hours. If a unified motor is used for high-speed operation, it will inevitably lead to waste of electricity.

Method used

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  • Motor multi-head quickly switching device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 The circuit structure block diagram shown is a multi-head fast switching device for a motor, including an A / D analog-to-digital converter 1 for data acquisition and conversion of the three-phase voltage, three-phase current and the speed of the motor unit 5, so Described A / D analog-to-digital converter 1 is connected with the input end of the DSP central processing unit 2 that adopts DSPIC33FJ64GP706 chip, and the output end of described DSP central processing unit 2 is connected with three contactors 4 through general interface 3, contactor 4A, The contactor 4B and the contactor 4C are respectively connected with the motor 5A, the motor 5B, and the motor 5C in the corresponding motor unit 5, and the signals of the motor 5A, the motor 5B, and the motor 5C are input to the A / D analog-to-digital converter 1 through the signal line .

Embodiment 2

[0029] Such as figure 2 As shown in the schematic diagram of the contactor, the DSP central processor controls the high-speed contact 4.1, low-speed contact 4.3 and closing contact 4.2 of the contactor 4 through a general interface, and controls the high-speed running state, low-speed running state and circuit closing switch of the motor Make a switch connection. To achieve the control of the motor speed, and when the switching fails, or various faults occur in the motor, the closing contact 4.2 of the contactor is connected, the power supply of the motor is cut off, and the running motor is protected in real time.

Embodiment 3

[0031] The DSP central processor performs the switching and protection of the motor unit according to the following steps:

[0032] 1. Judging the current running state of the machine, whether the current motor is running at high speed or low speed, or whether it is running a high-speed unit or a low-speed unit or other units.

[0033] 2. Switch the current operating state of the machine, switch the different operating speeds of the current motor, or switch between different units or even switch the operating part of the operating unit.

[0034] 3. Judgment of the switching process. During the switching process, it is automatically judged whether the switching is successful. If the switching process fails, it will prompt the failure content and correct the failure process, and protect the unit during the switching process. This step can be preset and run automatically.

[0035] 4. To protect the unit in operation, the voltage and current data will be returned to the controlle...

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Abstract

The invention provides a motor multi-head quickly switching device. The motor multi-head quickly switching device comprises an analog-to-digital (A / D) converter (1), wherein the A / D converter (1) is used for acquiring data of three-phase voltage, three-phase current and rotating speed of a motor unit; the A / D converter (1) is connected with the input end of a digital signal processor (DSP) central processing unit (2); the output end of the DSP central processing unit (2) is connected with a plurality of contactors (4) through a universal interface (3); the contactors (4) are connected with the corresponding motor unit (5); and the motor unit (5) inputs the signal into the A / D converter (1) through a signal wire. The motor multi-head quickly switching device increases power factor of the motor, improves performance of the motor, reduces noise of the motor, prolongs service life, saves electricity and protects the motor.

Description

[0001] technical field [0002] The invention relates to a motor switching device with a switching circuit or a motor running state. [0003] Background technique [0004] Motors such as water pumps and fans are commonly used equipment in various industrial and mining enterprises. They are used in a large amount and are large power consumers. Effectively saving electricity in this part will play a pivotal role. Since the motor generally operates at the rated power, its speed cannot be adjusted, the motor can only be in two states of on or off, even when the heat load is small, it must be turned on, and the power consumption of the motor is much greater than the actual Load needs, resulting in unnecessary energy consumption. For example, when the actual load only needs the capacity of 1.2 motors to be sufficient, two motors must be turned on, so the power consumption of 0.8 motor capacity is wasted. In addition, for large and medium-sized factories, there is a huge differe...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H02P5/00H02H7/08
CPCY02P80/10
Inventor王川张国勇胡炜吴鹏
OwnerANHUI HUIDIAN SCI & TECH