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Three-phase asynchronous motor minimum input power energy-saving device and its application method

A technology of input power and energy-saving devices, applied in the direction of AC motor control, electrical components, energy industry, etc., can solve the problems of increased use cost, low operating efficiency, resource waste, etc., and achieve the effects of improved efficiency, reasonable structure, and convenient use

Active Publication Date: 2016-08-24
新疆电子研究所股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a three-phase asynchronous motor minimum input power energy-saving device and its use method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the existing three-phase asynchronous motor The actual operating efficiency of the phase asynchronous motor is low, which causes waste of resources and increases the cost of use

Method used

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  • Three-phase asynchronous motor minimum input power energy-saving device and its application method
  • Three-phase asynchronous motor minimum input power energy-saving device and its application method

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Embodiment 1

[0025] Embodiment one: as accompanying drawing 1 、 2 As shown, the minimum input power energy-saving device of the three-phase asynchronous motor includes a power supply 1 , motor 2 , MCU 3 , thyristor 4 , trigger circuit 5 , Current and voltage sampling module 6 , Current and voltage detection circuit 7 , Relay control circuit 8 and main circuit AC contactor 9 ;power supply 1 There are three phase ports and a neutral terminal, the motor 2 There are three terminals, and each phase port is electrically connected to one of the terminals and forms three electrical connection branches 10 ;Each electrical connection branch 10 There is a silicon controlled rectifier in series on both 4 , each SCR 4 A trigger circuit is connected to the 5 , each trigger circuit 5 Both include a trigger output terminal and a trigger input terminal, and each trigger output terminal is respectively connected to the corresponding thyristor 4 are el...

Embodiment 2

[0033] Embodiment 2: A method for using a minimum input power energy-saving device for a three-phase asynchronous motor, comprising the following steps:

[0034] The first step is to connect the load to be used to the motor2 on, and turn on the power 1 and MCU 3 , MCU 3 Chip initialization will be completed automatically;

[0035] The second step, MCU 3 Through the voltage detection circuit from the current 7 The received data determines the power 1 is normal, when the power 1 When it is normal, go to the next step, if the power 1 abnormal, then to the relay control circuit 8 Send a signal to control the AC contactor of the main circuit 9 Cut off the power 1 , and restart from the first step;

[0036] The third step is to set the MCU 3 trigger circuit 5 issue a trigger pulse to regulate the SCR 4 The conduction angle gradually increases from zero conduction to full conduction, so that the motor 2 The voltage gradually increases from zero to ...

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Abstract

The invention relates to the technical field of energy-saving devices for three-phase asynchronous motors, and relates to a minimum input power energy-saving device for three-phase asynchronous motors and a method for using the same. Current and voltage detection circuit, relay control circuit and main circuit AC contactor; there are three phase ports and one neutral terminal on the power supply, three terminals on the motor, each phase port is electrically connected to one of the terminals and Three electrical connection branches are formed; a thyristor is connected in series on each electrical connection branch. The invention has a reasonable and compact structure. It can calculate the measured data through a single-chip microcomputer, and send corresponding pulses to the trigger circuit, so as to adjust the voltage of the motor by adjusting the conduction angle of the thyristor, and then realize the three-phase The adjustment of the efficiency of the asynchronous motor improves its efficiency while realizing energy saving and reducing its use cost.

Description

Technical field [0001] The invention involves the technology field of three -phase asynchronous motor energy -saving devices. It is a minimum input power energy saving device and its usage method of three -phase asynchronous motor. Background technique [0002] Three -phase asynchronous motor is a widely used power machinery, which consumes more than 50% of my country's total power generation.In the case of full load, the efficiency of motors is generally high, usually about 85%; however, once the load is reduced, the efficiency of the motor will decrease significantly.In the current use of the three -phase asynchronous motor, in most cases, it cannot reach a full -load state, resulting in a low efficiency of its actual operation, which will cause waste of resources and increase the cost of use. Invention content [0003] The present invention provides a three -phase asynchronous motor minimum input power energy -saving device and its usage method, which overcomes the lack of ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P27/16
CPCY02P80/10
Inventor 马新春陈建伟覃桢桢李剑冷春花
Owner 新疆电子研究所股份有限公司
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