The Evolution of Mitsubishi Quality

Mitsubishi Electric elevator quality is constantly evolving. The machine-room-less elevator provides technological advances that deliver a world-class ride in terms of comfort, reliability and safety.

Reduced Torque Ripple for a Comfortable, Smooth Ride

The gearless traction machine with the new PM (permanent magnet) motor is packed with cutting-edge technology, such as our unique stator-core structure and built-in double brakes. This optimized motor design dramatically reduces the level of torque ripple for smooth and quiet ride.

Ensuring that Quality Remains First Rate

Our elevators include features designed to reduce the need for maintenance - such as double brakes built into the PM motor. During scheduled maintenance, equipment in the top of the hoistway is easily accessible from the maintenance platform on top of the elevator cage. In addition, Mitsubishi Electric's highly trained service personnel continually ensure that our elevators run smoothly and safely.

Advanced Door Controls

VVVF (Variable Voltage Variable Frequency) Inverter Control has been adopted to ensure smoother and quieter door operations, thereby enhancing passenger safety and product reliability. Our innovative door operation system employs a highly efficient "One-chip RISC microcomputer" which detects the constant variations on each floor in the door load, the strength of the wind, and even sediment in the sill grooves. It adjusts the door open and close speeds, as well as the door motor torque as needed for each floor using the Auto Tuning function. The learning-capable Door Load Detector immediately reverses the doors when abnormal load is detected on the doors.

High-Speed Computer Processor

The high-accumulation LSI integrating digital control circuitry has significantly increased the speed of the computer processing, enabling precise control of the traction motor during acceleration and deceleration. This innovation delivers a quality ride with the least noise and vibration.

Innovative Technology Enhances Efficiency and Reliability

More technological advances, such as the high-accumulation LSI and low-noise PWM inverter, enable the VVVF inverter to deliver smooth, high-precision control of the traction machine. In addition, the IPU (Integrated Power Unit) acts as a high-efficiency power supply circuit for the motor drive and, along with the PM motor, delivers greater energy savings. The adoption of the low-noise IGBT with faster switching speeds also contributes to further reduce the noise. The result is a more efficient, more reliable drive control. The slim control panel is packed with advanced technologies such as VVVF, PWM and IPU.

 

Freedom of Layout

Because the machine is installed within the hoistway, there are far fewer restrictions on building design. Architects and interior designers have more design freedom than ever before.

More Architectural Freedom

Architects, builders, and even interior designers will appreciate the new design freedom that comes with the machine-room-less system. A machine room is no longer needed, as all machineries successfully fit into the hoistway, except the control panel, which can be placed wherever you like within a 98 feet 5 inches (30 meters) radius from the traction machine. Also, the load stress of our conventional elevator with a machine room applies on the building structure, whereas the guide rails of DIAMOND TRAC support as much as approx. 75% of the stress, for building friendliness.

Machine Room Removed for Space Saving

The miniaturization of the traction machine, leading to the development of the gearless traction machine with PM motor enables a hoistway to include in the upper section the driving devices that were installed in a machine room. Besides that, the square area of the hoistway is almost the same as our conventional elevator, contributing to space saving in your building. All you have to think about in your planning now is a hoistway only*.

*NEC 2003 Article 620-71 and ASME A17.1 2004 - A17.a-2005 Rule 2.7.6 stipulate that an elevator control panel must be installed outside the hoistway and thereby a separate room is required for control panels.

Miniaturized and Optimally Configured

Mitsubishi Electric has succeeded in miniaturizing key elevator equipment. The gearless traction machine with PM motor is installed within the hoistway. This arrangement frees up space normally required for separate machine rooms or penthouses. Equipment is configured for easy maintenance from car top, and the entire compact system is optimally organized for performance and service.