Hiroyuki Ikejima

TL;DR: In this article, an apparatus for controlling an AC powered elevator by rectifying a commercial AC power source into a direct current through a rectifier, converting the direct current into a variable frequency AC power through a main inverter, driving the AC motor by the thus converted AC power to operate the cage of the elevator, and sending the regenerated electric power back to the commercial power source via a regeneration inverter connected to the DC side of the main inverters when regeneration braking is applied to the electric motor.

TL;DR: A linear motor elevation system comprising an elongated magnetic induction member (21) mounted along the hoistway is described in this paper, where the magnetic induction element (31) may have a guide surface which is in guiding engagement with guide rollers (41) mounted on the car (4) for guiding it along the Hoistway.

TL;DR: In this paper, a smoothing condenser is charged through a resistor, and a control circuit monitors the charging time, and outputs an abnormal signal when the charging times are shorter than the prescribed value.

TL;DR: A linear motor elevator includes a multitude of primary side coils mounted on the hoist way along the whole hoist path, and vertical columns of permanent magnets constituting the secondary side magnets on the elevator car as mentioned in this paper.

TL;DR: In this article, an elevator control apparatus consisting of a converter device for supplying electric power to a motor for driving an elevator car and a car position calculation device for calculating the present position of the elevator car is described.