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Device for on-line adaptation of motor for automatic operation at optimum efficiency

An optimal efficiency, automatic operation technology, applied in the direction of AC motor control, electrical components, power factor control, etc., can solve problems such as energy waste and low efficiency

Inactive Publication Date: 2012-08-08
HUNAN GUXUN ENERGY SAVING TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of motor running at low efficiency causes a lot of waste of energy

Method used

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  • Device for on-line adaptation of motor for automatic operation at optimum efficiency
  • Device for on-line adaptation of motor for automatic operation at optimum efficiency
  • Device for on-line adaptation of motor for automatic operation at optimum efficiency

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Embodiment Construction

[0012] Combine below figure 1 The present invention is described in further detail:

[0013] The three-phase power supply of the present invention first passes through two input voltage transformers PT1 for measuring three-phase line voltages, two thyristors 16 connected in reverse parallel on each phase line, two output voltage transformers PT2 for measuring three-phase line voltages, and is connected in sequence. The current transformer CT on each phase line is then connected to the motor M, so that the device is connected in series between the three-phase power supply and the motor. Before the device is put into use, each parameter on the nameplate of the motor should be preset inside the device, and each time a different motor is replaced in the future, the corresponding parameters should be preset again; the motor parameters generally include rated voltage, rated current, rated speed Number, rated power, rated power factor, no-load current, etc. Presetting these paramete...

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Abstract

The invention relates to a device for on-line adaptation of a motor for automatic operation at the optimum efficiency, which comprises a three-phase supply and a central processing unit (CPU), wherein the three-phase supply supplies power for the motor and is connected with the motor after sequentially passing through an input voltage transformer, a thyristor, an output voltage transformer and a current transformer; and the CPU is respectively connected with the input voltage transformer, the thyristor, the output voltage transformer and the current transformer through an input voltage detecting circuit, a regulating circuit, an output voltage detecting circuit and an output current detecting circuit. The device figures out a real-time power factor and a load rate through continuously detecting various parameters of the motor, then the device compares the real-time power factor and the load rate with the rated power factor and the rated load rate of the motor, and voltage regulating control signals conduct phase control regulation for the thyristor through the regulating circuit, so that the motor operates in a speed close to the rated speed, the power factor is also close to the rated power factor, the motor is automatically adapted to operating at the optimum efficiency, and energy-saving operation is achieved.

Description

technical field [0001] The invention relates to the operating efficiency of a three-phase AC asynchronous motor, in particular to a device for optimizing the operating efficiency by detecting various parameters of the motor. Background technique [0002] Motors are important industrial energy-consuming equipment, which are widely used in pumps, fans, compressors, transmission machinery and other fields, and their power consumption accounts for more than 60% of China's entire industrial power consumption. At present, there are various forms of motors. Among them, the induction three-phase AC asynchronous motor is in a low-efficiency operating state during most of the working hours, and its power factor is generally only about 0.4, and the load rate is mostly between 30% and 50%. between. This motor running with low efficiency causes a lot of waste of energy. Contents of the invention [0003] In view of the above technical problems, the present invention provides a device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P25/02H02J3/18H02P23/26
CPCY02E40/30
Inventor 廖斯孟王化胡全云谢赋斌昌松
Owner HUNAN GUXUN ENERGY SAVING TECH
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