Permanent magnet traction machine

1. High efficiency and energy saving, good dynamic performance of the drive system: the permanent magnet synchronous traction machine with multi-pole low speed direct drive does not require a huge worm gear and worm reduction gearbox with a mechanical transmission efficiency of only about 70%; compared with the induction motor, There is no need to draw reactive current from the grid, so the power factor is high; since there is no excitation loss without excitation winding, the heat is small, so no fan, no wind and no friction, and high efficiency; using magnetic field oriented vector conversion control, it has the same excellent performance as the DC motor. Torque control characteristics, starting and braking current is significantly lower than the induction motor, the required motor power and inverter capacity are reduced.

2, stable operation, low noise: direct drive at low speed, so the bearing noise is low, no fan, no worm gear noise. The noise can be generally 5 to 10 decibels lower, reducing environmental noise pollution.

3, saving construction space: no huge reduction gear box, no excitation winding, using high-performance NdFeB permanent magnet material, so the motor is small, light weight, can reduce the machine room or no machine room.

4, long service life, safe and reliable: the motor does not need brushes and collector rings, so the service life is long, and the oil and gas without gearboxes has less environmental pollution.

5. Low operating and maintenance costs: no brush, no gearbox, easy maintenance.

Compared with the geared traction machine, the permanent magnet synchronous traction machine has the absolute advantage of energy saving and environmental protection. This has long been recognized in Europe and Japan, and has recently been discussed in the Chinese industry. In addition to the advantages that the above-mentioned client can clearly recognize, at the level of safety: due to the simplified structure, the characteristics of rigid straight-axis braking, providing full-time up-and-down overspeed protection, using the characteristics of the back electromotive force of the permanent magnet motor, It realizes the self-locking function of the worm gear and provides multiple layers of safety protection for the elevator system and passengers. At the application level: due to the miniaturization and thinning characteristics of the permanent magnet synchronous traction machine, the arrangement of the elevator and the matching space with the building are greatly improved, and it is believed that the architect can provide more flexible design space. Indirectly improve the function and quality of people in the construction space.

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