A permanent magnet synchronous traction machine with deceleration device

Abstract

The invention relates to a permanent magnet synchronous traction machine with a speed reducer. The permanent magnet synchronous traction machine is characterized by comprising a permanent magnet synchronous motor and a gear reducer; a shaft extension end of the permanent magnet synchronous motor is matched with an input end of the gear reducer; a mouth is arranged on the end surface of a front end cover of the permanent magnet synchronous motor and matched with a mouth of the input end of the gear reducer; the permanent magnet synchronous motor and the gear reducer are connected through a bolt; a brake wheel is arranged in the permanent magnet synchronous motor and installed at the rear end of a rotation shaft of the permanent magnet synchronous motor; the two sides of the permanent magnet synchronous motor are provided with block brakes; the block brakes are fixed on an engine base of the permanent magnet synchronous motor through bolts; inner side brake blocks of the block brakes pass through a square engine base hole and then are pressed on the external circle of the brake wheel; a hole is formed in a rear end cover of the permanent magnet synchronous motor; a pinion at the front end of a turning wheel passes through the hole and is engaged with a turning gear arranged in the permanent magnet synchronous motor; and a traction wheel is connected to an output shaft of the gear reducer. Compared with the prior art, the permanent magnet synchronous traction machine has the advantages of effectively reduction in consumption of permanent magnets, high efficiency, low noise and high power factor.

Description

technical field [0001] The invention relates to a traction machine for an elevator. Background technique [0002] The existing permanent magnet synchronous traction machine needs to use a large number of permanent magnets in order to ensure sufficient traction power at low speeds. Since the rare earth permanent magnet synchronous gearless traction machine has a compact structure, high efficiency, and remarkable energy-saving effect, it does not need Gear lubricating oil and other outstanding advantages, therefore, the rare earth permanent magnet synchronous gearless traction machine has become the first choice for elevators. The price of magnetic materials continues to rise. For example, the neodymium alloy required for rare earth permanent magnets has risen from 300,000 yuan / ton a year ago to 1.7 million yuan / ton now, so that the cost of permanent magnet synchronous gearless traction machines has risen sharply. In addition , When the motor is running at low speed, its effi...

AI Technical Summary

Problems solved by technology

[0002] The existing permanent magnet synchronous traction machine needs to use a large number of permanent magnets in order to ensure sufficient traction power at low speeds. Since the rare earth permanent magnet synchronous gearless traction machine has a compact structure, high efficiency, and remarkable energy-saving effect, it does not need Gear lubricating oil and other outstanding advantages, therefore, the rare earth permanent magnet synchronous gearless traction machine has become the first choice for elevators. The price of magnetic materials continues to rise. For example, the neodymium alloy required for rare earth permanent magnets has risen from 300,000 yuan / ton a year ago to 1.7 million yuan / ton now, so that the cost of permanent magnet synchronous gearless traction machines has risen sharply. In addition , when the motor is running at low speed, its efficiency is generally only more than 80%, and it is difficult to achieve satisfactory efficiency

However, the traction machine with asynchronous AC worm gear and worm reduction gearbox structure requires a mechanical deceleration mechanism with a relatively large transmission ratio due to the high speed of the motor. This mechanical deceleration mechanism has high energy consumption, high noise, and low power factor.

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