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Rectified feedback circuit

A feedback circuit and rectifier circuit technology, applied in the field of energy-saving control, can solve the problems of difficult recycling of regenerative energy, and achieve the effect of ensuring stability and improving energy-saving efficiency.

Active Publication Date: 2013-10-23
湖南建科鼎智能科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a rectification feedback circuit to solve the technical problem that the regeneration energy of the existing frequency conversion speed regulation system is difficult to recycle.

Method used

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Embodiment Construction

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0027] refer to figure 1 , a preferred embodiment of the present invention provides a rectification feedback circuit for a frequency conversion speed regulation system, the rectification feedback circuit includes a rectification circuit 10 and an energy feedback circuit 20 . Among them, the rectifier circuit 10 is used to convert the AC power input into the power grid 30 into a DC power output to the DC bus 40, and the DC bus 40 provides DC power for the frequency conversion speed regulation system; the energy feedback circuit 20 is used to feed back the excess electric energy on the DC bus 40 to the input grid 30 . Since the frequency conversion speed regulation system will generate regenerative energy in the case of passive operation, which will ...

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Abstract

The invention discloses a rectified feedback circuit used for a variable-frequency speed control system. The rectified feedback circuit comprises a rectifying circuit and an energy feedback circuit. The rectifying circuit is used for converting an alternating current of an input power grid into a direct current and outputting the direct current to a direct current bus supplying electricity to the variable-frequency speed control system. The energy feedback circuit is used for feeding redundant electric energy on the direct current bus back to the input power grid. According to the rectified feedback circuit, the direct current bus on the output side of the rectifying circuit is connected with the input power grid on the input side of the rectifying circuit through the energy feedback circuit, regeneration energy produced when the variable-frequency speed control system with the electricity supplied by the direct current bus is under the condition of passive operation is fed back to the input power grid through the energy feedback circuit, accordingly, the regeneration energy is recycled on line, the energy-saving efficiency of the whole system is improved, and the stability of direct current supplying voltage of the variable-frequency speed control system is guaranteed.

Description

technical field [0001] The invention relates to the field of energy-saving control, in particular to a rectification feedback circuit. Background technique [0002] With the development of science and technology, AC motor frequency conversion speed regulation technology has been widely used. For example, in the field of construction elevators, due to the large starting current when the construction elevator starts, and the large potential energy in the downward process, the mechanical impact is large every time it stops. The elevator control gradually accelerates to a given speed, the operation is stable, the mechanical impact is small, and the power consumption of the construction hoist gradually increases from small to large, and there is no inrush current. When the construction elevator goes down, the potential energy of the construction elevator itself is used to drive the motor to run, and the power consumption is small. Therefore, the construction elevator controlled...

Claims

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Application Information

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IPC IPC(8): H02J3/38
Inventor 王少何陈喜生王心正马继安刘自雄孟伟
Owner 湖南建科鼎智能科技有限公司
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