Machine Room Elevator

Vasatile Design Arrangement

A series of models have been developed to cope with the increse in the load capacity from 450 kg to 1600 kg, and the speed from 60 m/min to 150 m/min.

Fine Operation

HITACHI has developed a supervisory control system called "FI (Flexible Intelligence) series". This software is applicable to a wide number of uses in buildings, and realizes individualization through the use of "Fuzzy" and "Expert" systems. The parameters are adjusted according to actual utilization conditions of the elevators. HITACHI prepared two grades of supervisory control systems in accordance with the parameters.

Noise Reduction

The IPM (Intelligent Power Module) is characterized by large-capacity, low-loss, high-speed switching, and equipped with a self-protecting function. By using this IPM, the switching frequency has been improved to 10 kHz.
 

Full Range of Functions for the Age of the Intelligent Building

Microprocessors connected by SCL (Serial Communication Link) are located in the car, on each floor and in the machine room. This enables flexible expansion of the system.

Use of RISC Microprocessor

The digital-control system uses the RISC (Reduced Instruction Set Computer) microprocessor to digitally process everything from the speed command input ot the PWM (Pulse Width Modulation) pulse output.

Door Open/Close Control
(Speed feedback control)

The door open and close control is governed by PWM (Pulse Width Modulation). The rotary encoder detects the open/close speed and position of the door and feeds back the signal's speed to the door control microprocessor. The microprocessor processes with the pre-set speed command and controls the door open/close speed.