Method for dynamically adjusting voltage and device thereof

A technology of dynamic voltage regulation and voltage regulation transformer, which is applied in the direction of AC motor control, reactive power adjustment/elimination/compensation, sustainable manufacturing/processing, etc. It can solve the problems of changing motor speed, high cost, wasting power, etc. Improve the power factor, switch stable and reliable, improve the effect of efficiency

Inactive Publication Date: 2010-02-10
戚健兴 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, when the AC motor is in operation, the input voltage cannot be automatically adjusted when there is no load or light load, which wastes a lot of power and reduces the power factor of the power supply system. The existing technology uses freque

Method used

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  • Method for dynamically adjusting voltage and device thereof

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Embodiment Construction

[0020] At first, explain the inventive idea:

[0021] When the motor is running, the weight of the load is constantly changing. The weight of the load is detected by the measurement module, and then the MCU control module is responsible for calculation, and the output control switching module performs the switching of the zero line tap of the autotransformer, and cooperates with the star-delta switching switch. Star-delta conversion, changing the working mode and supply voltage of the motor.

[0022] When the motor is running with light load, the MCU control module outputs a step-down signal to the switching module to switch the zero-line step-down of the zero-line tap of the autotransformer. If the measurement data shows that the motor is still light-loaded, continue to step down. If the voltage is still On the high side, the star-delta switches to star operation. Until the measurement data shows that the motor is running normally.

[0023] When the motor is running under h...

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Abstract

The invention relates to a method for dynamically adjusting voltage and a device thereof, wherein the device comprises a power factor measurement control module connected with the control end of a star-delta automatic switching device and the control end of a voltage-adjusting transformer and used for measuring the power factor of an alternating current machine. The method comprises: calculating the power factor of the machine according to measured current and voltage phase differences of the alternating current machine; and controlling the output voltage of the voltage-adjusting transformer of the input end of the alternating current machine according to the power factor. The method for dynamically adjusting voltage and the device thereof are capable of automatically adjusting voltage according to the load state of the machine so as to further save energy, improve the power factor and increase the service efficiency of a power supply system without influencing the rotating speed of the machine.

Description

technical field [0001] The invention relates to an AC motor, in particular to a dynamic voltage regulation method and a device thereof. Background technique [0002] At present, when the AC motor is in operation, the input voltage cannot be automatically adjusted when there is no load or light load, which wastes a lot of power and reduces the power factor of the power supply system. The existing technology uses frequency converters to achieve energy saving, but The use of a frequency converter is costly and will also change the speed of the motor. At the same time, a lot of high-order harmonics are generated, which will cause great harm to the stability of the power supply system. [0003] In addition, the applicant has also applied for Chinese utility models "a star-delta automatic switching device" and "a voltage-regulating energy-saving device". Contents of the invention [0004] The technical problem to be solved in the present invention is how to provide a dynamic v...

Claims

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Application Information

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IPC IPC(8): H02P23/00H02J3/18H02P23/02
CPCY02E40/30Y02P80/10
Inventor 戚健兴岑国秋
Owner 戚健兴
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