승강기 부하보상장치가 승차감에 미치는 영향

Abstract

An elevator is a complex transport system which consist of many electric devices and mechanical systems. Of course, it is built in the several types of structure and used for the passenger, cargo handling and so on. In general, the elevator system is operated on the several established modes which are called the automatic, manual and operator mode. And, additionally, the pushing the button for destination, opening and closing the door, emergency stop and load compensating functions are incorporated also. Especially, the deriving system is made of the main derive part and control part. The main derive which is called the winding machine is equipped with an induction motor, an electric braker and a governor. And, in the inverter as the control part, a control signal is generated to control the motor such that the elevator motion is controlled in the one's objects. There are many types of compensating systems in the deriving device of the elevator. In this study, especially, a LVDT(linear variable differential transformer) type load compensating system is considered. A load compensation is needed to cope with load variation which depends on numbers of passengers in the car. In general, the load compensating system is actively operated to suppress undesirable motions and to obtain good riding comport. However, the control actions(signals) are preset in the compensation system. It means that if the load weight is measured from load sensor then a pre-calculated motor control signal is activated from the solution table. But, it is a kind of passive compensating system so that it can not cope with an unpredictable states such as a rope tension unbalance, sheave worn down and etc. The rope tension unbalance may be come from several system conditions. It is well known that the sheave worn down is a key factor in the rope tension unbalance. It means that the load compensating system can not cope with the rope tension unbalance phenomena such that the good riding comport in the acceleration and deceleration states can not be preserved also. To over come this problem and obtain better riding comport, an useful solution and strategy is studied by analysis of the load sensing system and deriving system of a real plant. In the result, a new sensing device to cope with an undesirable compensation is developed and the usefulness of the developed system is verified from the experiment.