公开(公告)号：US4083431A

公开(公告)日：1978-04-11

申请号：US680858

申请日：1976-04-27

申请人： Takeshi Oohira ,  Tomiaki Kurihara

发明人： Takeshi Oohira ,  Tomiaki Kurihara

IPC分类号： B66B1/24 ,  B66B1/28 ,  B66B1/30 ,  H02P3/24 ,  H02P27/02

CPC分类号： B66B1/308 ,  B66B1/285 ,  H02P21/00

摘要： A bridge circuit including a couple of thyristors and a two diodes is connected between a three-phase ACpower supply and a three-phase induction motor for driving an elevator car. The bridge circuit is adapted to make up a controlled rectifier circuit or an inverse-parallel connection circuit of thyristors, as the case may be, by switching a plurality of contactors. At the time of starting and accelerating the elevator car, the bridge circuit is changed to constitute an inverse-parallel connection circuit of thyristors to which a signal for a sufficiently high speed command is applied. This speed command is applied to a phase shifter, which fires the thyristors in inverse-parallel connection at a sufficiently large conduction angle. In consequence, the three-phase induction motor produces a sufficiently large accelerating torque, so that the car is accelerated according to differences between the accelerating torque and the elevator car load torque. When the accelerated car reaches a deceleration-starting point, the speed command in changed to another command decelerating the car at a predetermined rate toward a destination. At the same time, the phase shifter is changed over to receive a deviation signal between the speed command signal and the output signal of the tachometer generator connected to the motor. The inverse-parallel connection of thyristors is changed over to the controlled rectifier circuit connection. The motor is thus decelerated by a speed feedback control system of a DC braking type.

摘要翻译： 包括一对晶闸管和两个二极管的桥接电路连接在用于驱动电梯轿厢的三相交流电源和三相感应电动机之间。 桥接电路适于通过切换多个接触器来构成可控整流器电路或晶闸管的逆并联连接电路（视情况而定）。 在启动和加速电梯轿厢时，桥电路被改变以构成施加足够高速命令的信号的晶闸管的反并联连接电路。 该速度指令被施加到移相器，其以足够大的导通角以反并联方式触发晶闸管。 因此，三相感应电动机产生足够大的加速转矩，使得根据加速转矩和电梯轿厢负载转矩之间的差异来加速轿厢。 当加速轿厢到达减速起始点时，速度指令改变为另一个命令以预定速率朝向目的地减速轿厢。 同时，移相器被切换以接收速度指令信号和连接到电动机的转速计发生器的输出信号之间的偏差信号。 晶闸管的反并联连接转换为可控整流电路连接。 因此，电动机由直流制动型的速度反馈控制系统减速。

公开(公告)号：US4056759A

公开(公告)日：1977-11-01

申请号：US475801

申请日：1974-06-03

申请人： Nobuo Mitsui ,  Akinori Watanabe ,  Takeshi Oohira ,  Kazuhiko Kawauchi ,  Shoichi Nakao ,  Katsuya Teranishi

发明人： Nobuo Mitsui ,  Akinori Watanabe ,  Takeshi Oohira ,  Kazuhiko Kawauchi ,  Shoichi Nakao ,  Katsuya Teranishi

IPC分类号： B65G23/36 ,  B66B23/02 ,  B66B25/00 ,  H02P29/00 ,  H02P7/00

CPC分类号： B65G23/36 ,  B66B23/02 ,  H02P29/40

摘要： A driving system for moving paths or escalators which use an endles chain adapted to be circulated between a path for transporting passengers, comprising a first and a second sprocket disposed at one end portion and substantially middle portion of the path, respectively, a first and a second induction motor coupled respectively to the first and second sprockets and each having the same rating output the sum of which is selected to be substantially equal to a maximum capacity of the system, an induction coupling interposed between the second sprocket and the second induction motor, means for detecting a current flow through the first induction motor, means for setting a reference value, and a thyristor amplifier for exciting the induction coupling in response to an excess developed when an output of the detecting means exceeds the reference value.

摘要翻译： 一种用于移动路径或自动扶梯的驱动系统，其使用适于在用于运送乘客的路径之间循环的脚链，包括分别设置在路径的一个端部和大致中间部分处的第一和第二链轮，第一和第二链轮 第二感应电动机分别耦合到第一和第二链轮，并且每个具有相同的额定输出，其总和被选择为基本上等于系统的最大容量;插入在第二链轮和第二感应电动机之间的感应耦合， 用于检测通过第一感应电动机的电流的装置，用于设定参考值的装置，以及用于当检测装置的输出超过参考值时响应于过度显影而激励感应耦合的晶闸管放大器。