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Three-phase ac electric motor electricity saver

A three-phase AC, motor technology, applied in AC network to reduce harmonics/ripples, reactive power compensation, harmonic reduction devices, etc., can solve problems such as large capacitance difference, easy overvoltage, and easy burnout Achieve excellent compensation effect, reduce interference and suppress high-order harmonics

Inactive Publication Date: 2008-06-18
付廷福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, the power savers used on three-phase motors are usually: one is the "Y" type "△" connection method that automatically switches the motor winding under different load conditions according to the motor work, and the other is the capacitance compensation method, but , the capacitor of this power saver is prone to overvoltage, and the difference in capacitance is large, the action of the switcher is frequent, and it is easy to burn out

Method used

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  • Three-phase ac electric motor electricity saver

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Embodiment Construction

[0008] refer to figure 1 , three sets of output circuits 2 are respectively connected to the three-phase power supply 1, and each set of output circuits can have several circuits. The connected capacitor 5 is connected in series, the inductors L4 and L5 are connected in parallel with the inductor L1 to the A phase of the three-phase power supply, the inductors L6 and L7 are connected in series with the inductor L2 and connected to the B phase of the three-phase power supply in parallel, and the inductors L8 and L9 After being connected in series with the inductance L3, it is connected in parallel to the C phase of the three-phase power supply. The inductance can play the role of decoupling, filtering and easing the current.

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Abstract

The invention provides a three-phase AC motor power saver. A three-phase power supply is connected with three groups of output circuits respectively; after being connected in series, inductances L4 and L5 are connected an inductance L1 in parallel and connected with the A phase of the three-phase power supply; after being connected in series, inductances L6 and L7 are connected with an inductance L2 in parallel and connected with the B phase of the three-phase power supply; after being connected in series, inductances L8 and L9 are connected with an inductance L3 in parallel and connected with the C phase of the three-phase power supply; the invention has the advantages that the invention can avoid the breakdown of capacitors by adopting the technical proposal, has optimum compensation effect which is higher than the compensation index of the power factor in the prior art, effectively restrains the high harmonic generated by the motor, reduces the interference to the power network, and has simple structure, reliable works and obvious power-saving effect, etc.

Description

Technical field: [0001] The invention relates to a control circuit, in particular to a three-phase AC motor saver used for power saving of a three-phase asynchronous motor. Background technique: [0002] At present, the power savers used on three-phase motors are usually: one is the "Y" type "△" connection method that automatically switches the motor winding under different load conditions according to the motor work, and the other is the capacitance compensation method, but , The capacitor of this power saver is prone to overvoltage, and the difference in capacitance is large, the switcher operates frequently, and it is easy to burn out. Invention content: [0003] The purpose of the present invention is to provide a three-phase AC motor saver with simple structure, reliable operation and obvious power saving effect; the purpose of the present invention is achieved through the following technical solutions: [0004] A three-phase AC motor power saver, three sets of outpu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/18H02J3/01
CPCY02E40/30Y02E40/40
Inventor 付廷福付周恩付周亮周玉杰
Owner 付廷福