| As potential energy load, the elevator works in two states of "braking conditionof energy feedback" and "electric condition of energy consuming" whose energy offeedback almost equals energy of consumption. Therefore, the elevator has a hugepotential for energy saving. An urgent demand of building a resource-saving andenvironment-friendly society makes the research of energy-saving elevatorsignificant.Firstly, the research background and significance of the energy saving elevatoris introduced. The structure of super capacitor energy storage type elevator is studied.Then, the development situation of the super capacitor energy storage type elevatorat home and abroad is studied.Secondly, the current development of energy storage technology, the advantagesof super capacitor energy storage and the problems of super capacitors in practicalapplication problems are introduced. The equivalent mathematical model of thesuper capacitor, the reason of the imbalance of super capacitor monomer voltage, thesuper capacitor voltage equalization method and the super-capacitor voltageequalization methods of energy feedback and energy consuming are studied. Basedon the bidirectional DC-DC converter method, the fuzzy control bidirectionalDC-DC converter balance method is introduced. Simulation results show that theuse of the voltage balance fuzzy controller cuts the time of super capacitor voltagebalance.Thirdly, the characteristics of the PWM converter, the establishing method ofthe mathematical model, and the control method are presented. In order to ensure theelevator speed performance, the fast and smooth switching of bi-directional powerflow, a unified bi-directional power flow regulator of Single-ended voltage stabilitycontrol is introduced in the application of energy-efficient elevator. Based on theunified mathematic model of bi-directional converter of Single-ended voltagestability control, the controller of Boost type bi-directional converter of single-endedvoltage stability is designed. The bode diagram demonstrates that the design of thecontroller of Boost type bi-directional converter of Single-ended voltage stability iscorrect. At last, the operating characteristics of the elevator and the select of theparameters are described. The Matlab/simulink simulation model of single-endedvoltage super capacitor energy storage type elevator is built, the simulation resultsshow that the stand-alone single-ended voltage super capacitor energy storage typeelevator saving effect is obvious. For the hardware and software design of the supercapacitor energy storage elevator, the hardware circuit of the super capacitor energystorage device and the software flow chart of the super capacitor energy storagedevice as it works are introduced. |
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