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Your current location: Home > Products > Elevator Traction Machine > PM synchronous gearless traction machine
Elevator Traction Machine
PM synchronous gearless traction machine
Products Introduction: PM synchronous gearless traction machine is composed of a PM synchronous motor, a braking system, and a traction sheave. The operating principle: With the inverter providing 3-phase VVVF power based on encoder feedback, the traction machine generates rotating magnetic field to drive the motor rotor spinning at synchronous speed, which then drives the traction sheave and makes use of friction between the sheave and steel wire ropes to achieve the elevator movement.
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  • Products Introductions
  • Products Characters
  • Product series, appearance and installation dimensions
  • Villa elevator EWB series
  • Passenger elevator EWK series
  • Groove parameters

PM synchronous gearless traction machine is composed of a PM synchronous motor, a braking system, and a traction sheave. The operating principle: With the inverter providing 3-phase VVVF power based on encoder feedback, the traction machine generates rotating magnetic field to drive the motor rotor spinning at synchronous speed, which then drives the traction sheave and makes use of friction between the sheave and steel wire ropes to achieve the elevator movement.

 

Product Features

The PM synchronous gearless traction machine is optimally designed by ANSOFT finite element method, analyzing electrical parameters, optimizing inherent parameters such as air gap, winding and magnetic field, and eliminating torque pulsation, thus improving the riding comfort of the elevator.

Multipole design of the rotor ensures sufficient torque for motor at low frequency, low voltage and low speed, to avoid elevator shakes during slow start and to improve the riding comfort during elevator braking.

Small size
The small-sized and light-weighted traction machine is able to be installed anywhere in the hoistway. Its delicate efficient design maximizes the space utilization, providing users with more available spaces.

Solid dual supports
Shaft-extension fixation at two ends of the motor, i.e. solid dual supporting, provides the traction sheave with reasonable stress to fundamentally solve the side wearing problem of the sheave. It also eliminates elevator shaking and improves operating stability.

Long lasting bearing
The bearing set, highly redundantly designed, free from maintenance, has a service life of 80,000 hours operating under full load.

Appropriate mechanical structure
Systematic analysis on mechanical load of spare parts and stress deformation by use of finite element analysis software makes the mechanical structure of the traction machine more appropriate and reasonable, thus prolonging its service life.

Double groove design
EWK series traction machine for passenger elevator with 1+1 double-groove redundant design offers one extra set of grooves with two cable-hanging methods, which makes installation more flexible and saves replacement cost of the traction sheave. 

Self-weighing system
EWB series traction machine for villa elevator with a built-in high-precision weighing sensor not only avoids measurement errors caused by aging traditional elastic material, but also eliminates tedious weighing control system. 

Ultra quiet design
The traction machine produces only 52 dB(A) noises with rated load attributed to the great electromagnetic design.

User-friendly installation
The traction machine has a built-in horizontal measurement device for balance adjustment during installation.