Energy-saving control system

An energy-saving control system and energy-saving control technology, applied in the field of elevator control, can solve the problem that the regenerative energy cannot be recycled, and achieve the effect of ensuring stability and improving energy-saving efficiency

Inactive Publication Date: 2013-10-16
HUNAN CCBT CONSTR MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an energy-saving control system to solve the existing technical problem that the regenerative energy generated when the elevator goes down or brakes cannot be recycled.

Method used

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Embodiment Construction

[0036] 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.

[0037] refer to figure 1 and figure 2 , the preferred embodiment of the present invention provides an energy-saving control system, which is suitable for an elevator 10. The elevator 10 includes two cages 11, and the two cages 11 are driven by two AC motors M to move along the standard section 12 respectively. Lifting movement. The energy-saving control system in the embodiment of the present invention includes an energy-saving control unit 20 and a variable frequency drive unit 30 . Among them, the energy-saving control unit 20 includes a rectifier circuit 21 and an energy feedback circuit 22; the rectifier circuit 21 is connected to the variable frequency drive unit 30 through the DC bus 40, and is used to convert the AC power input into the gr...

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Abstract

The invention discloses an energy-saving control system. The energy-saving control system comprises an energy-saving control unit and a varying frequency driving unit. The energy-saving control unit comprises a rectifying circuit and an energy feedback circuit, wherein the rectifying circuit is used for converting alternating current of an input power grid into direct current and outputting the direct current to a direct current bus. The varying frequency driving unit is used for converting the direct current on the direct current bus into alternating current with adjustable frequency and voltage to drive a motor to work. The energy feedback circuit is located between the direct current bus and the input power grid, and is used for feeding regenerated energy on the direct current bus back to the input power grid in the descending or braking process of a lift. According to the energy-saving control system, the alternating current of the input power grid is converted into the direct current at the direct current bus side by means of the rectifying circuit, a direct current bus located at the output side of the rectifying circuit is connected with the input power grid at the input side of the rectifying circuit through the energy feedback circuit, so that the regenerated energy on the direct current bus is fed back to the input power grid through the energy feedback circuit, and therefore one-line recycling of regenerated energy is realized.

Description

technical field [0001] The invention relates to the field of lift control, in particular, to an energy-saving control system for lift control. 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 co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/06H02J3/38
Inventor 王少何陈喜生王心正马继安刘自雄孟伟
Owner HUNAN CCBT CONSTR MACHINERY
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