Embedded frequency-conversion potential energy recycling system for port crane
A port crane, potential energy recovery technology, applied in the direction of electric vehicles, electrical components, transportation and packaging, etc., can solve the problems of no reference to the potential energy of the main motor, waste of rectification part of the frequency converter, high cost of use, etc., to achieve compact structure and avoid safety Hidden dangers, the effect of overcoming the impact of the power grid
Inactive Publication Date: 2015-07-22
JIANGSU GANGYI HEAVY IND +2
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Problems solved by technology
The rectification part carried by each frequency converter is wasted
Moreover, the independent rectification feedback unit in the existing market is expensive and the cost of use is too high. Furthermore, the prior art does not mention how to recycle the potential energy of the main motor
Method used
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[0026] The present invention will be further described below in conjunction with the accompanying drawings.
[0027] Port cranes generally include support / travel frequency converters, switching / travel frequency converters, luffing frequency converters, first rotation frequency converters and second rotation frequency converters, and the frequency converters described here are motor controllers in the application of the present invention , During the working process of the port crane, the motors corresponding to each frequency converter are not necessarily in the same working state, that is, some motors are in the state of energy consumption, and some motors are in the state of generating electricity.
[0028] like figure 1 The shown port crane embedded frequency conversion potential energy recovery system includes a plurality of motor controllers 1 for controlling the working motors 2 of the crane. The motor controller 1 includes a rectification unit 12 and a speed regulation ...
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The invention belongs to an energy recycling device of a port crane, in particular to a frequency-conversion potential energy recycling system for the port crane. The embedded frequency-conversion potential energy recycling system for the port crane comprises multiple motor controllers which are used for controlling a working motor of the crane. Each motor controller comprises a rectifying unit and a speed-regulation unit connected with the rectifying unit, wherein the speed-regulation unit is connected with the motor, and the rectifying unit is connected with the power grid. The embedded frequency-conversion potential energy recycling system for the port crane is characterized by further comprising multiple public direct-current buses which are connected with the motor controllers. The public direct-current buses are connected between the rectifying unit and the speed-regulation unit and further connected with an energy management control unit, and the energy management control unit is connected with an energy storage unit. The embedded frequency-conversion potential energy recycling system for the port crane is established through the motor controllers and low in cost and compact in structure, and realizes the combined control of energy feedback and energy consumption protection as well as the voltage stability of the public direct-current buses in the feedback procedure.
Description
technical field [0001] The invention belongs to an energy recovery device of a port crane, in particular to a recovery and utilization system of frequency conversion potential energy of a port crane. Background technique [0002] Hoisting machinery is a construction machinery with typical potential energy load characteristics. In each working cycle of the crane, it includes the link of lifting the heavy object of the lifting mechanism and the braking link of the translation mechanism. At this time, the motor will be dragged and in the state of power generation, which will generate a certain amount of regenerative energy and feed it back to the DC bus of the inverter. Traditional equipment can only use the DC energy consumption braking unit to consume energy in the form of heat on the resistor, resulting in energy waste. [0003] Patent No. 2013203547482, named potential energy recovery and reuse device and crane, discloses a potential energy recovery and reuse device, inclu...
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IPC IPC(8): H02J7/34
CPCH02J7/34
Inventor 周新民陈建峰
Owner JIANGSU GANGYI HEAVY IND