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Improved energy storage method for load hoisting machinery

一种能量储存、载荷的技术，应用在载荷吊挂元件、电梯的能源效率、升降机等方向，能够解决重量重、不喜欢、价格贵等问题

Inactive Publication Date: 2007-10-31
PACECO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. DC motors are relatively large in size, heavy in weight and expensive
However, because the reverse current includes frequency fluctuations and offsets, other power users do not like to use it
It is expected that the return of reverse power to the grid may be prohibited in the future

Method used

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  • Improved energy storage method for load hoisting machinery
  • Improved energy storage method for load hoisting machinery
  • Improved energy storage method for load hoisting machinery

Examples

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Embodiment Construction

[0032] best practice

[0033] Preferred embodiments of the invention are described with reference to the drawings, wherein like numerals refer to like elements in corresponding drawings.

[0034] Figures 1-3 illustrate the prior art of the invention described in the Background section of this specification. Figure 3 shows a patented prior art device which improves upon the device of Figure 1 with additions shown in dashed lines. The description of Fig. 1 in the background art mainly focuses on the operation of 11, 13, 15, 17, 19, 21 and 23 in the device.

[0035] Referring to Fig. 3, the facility of the present invention is described. When the load 23 is lifted by the hoisting machinery 21 of the system, both the prior art and the present invention use the electric power from the municipal power network or the generator 13 driven by the self-contained diesel engine to drive the first induction motor 19. The induction motor 19 is connected to the load lifting cable reel 21 t...

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PUM

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Abstract

A method for energy storage and recovery for load hoisting equipment powered by an induction hoist motor controlled by a first inverter and having a dual inverter controlling a capacitor utilizing rest power such as reverse power generated from the motor when lowering a load, and unused power at small load or idle, to charge the capacitor whereby energy is stored in the capacitor and the system is reversed when a load is lifted and power is consumed whereby the capacitor is discharged to deliver power to the hoist motor.

Description

technical field [0001] The present invention relates to improvements to a patented method of energy storage for use with cranes or other load lifting machinery. More particularly, it relates to an improvement in the method of storing energy in capacitors charged by drive motors of load lifting machinery. When the load increases and more power is required, the stored energy can be re-supplied to the system. Background technique [0002] The present invention relates to a method or system for energy storage of an electrically driven load lifting crane. The invention is particularly useful for machines driven by diesel generators and having a varying load range. The system stores energy during pullback or small loads and supplies power during maximum or heavy loads. In theory, this is a simple mechanical idea with the advantage that the mains supply only needs to supply a relatively constant average power, rather than peak power. But, until now, problems with the practical ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66B1/06B66B1/00B66B1/30H02P3/14
CPCB66C13/28B66B1/30Y02B50/142Y02B50/00H02J7/04
Inventor 竹原亨市村欣也
Owner PACECO