Oil cooled PM motor

What&#;s a permanent magnet (PM) motor?

A PM motor is an ac motor that uses magnets embedded into or attached to the surface of the motor&#;s rotor. The magnets are used to generate a constant motor flux instead of requiring the stator field to generate one by linking to the rotor, as is the case with an induction motor.

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 The archenemy &#; demagnetization

Although the material is called Permanent Magnet, the magnet is not standing forever. It has its own capabilities and limitations. If the material is exposed to high temperatures or impacted by large electrical disturbance, this could cause PM to demagnetize. if this situation happens, the working life of PM will be shortened forever.

Measures are taken to protect PM

To ensure the PM motor has a long working life, Atlas Copco has taken ways to protect and remove this risk.

1.  Adopt high-quality permanent material &#; SmCo5

SmCo5 has a much higher temperature resistance (250&#;350&#; ) than commonly used material-NdFeB (60&#;200&#;), this most stably material ensures Atlas Copco&#;s PM motor could work in high temperature areas.

• • • SmCo5 Magnetic stability is higher ( Flux weakening 0.03%/ &#; )
    • NdFeB Magnetic stability is lower ( Flux weakening 0.19%/ &#; )

SmCo5 also has a much lower iron content which is 14-17%, whereas NdFeB has a 63.95-68.65%. Higher iron content will cause rust for the motor. This could bring down motor efficiency and increase power consumption.

 2. Use oil to cool down the motor

Cooling oil from the cooler first fully in contact with PM motor shell then send to rotor housing to cool the rotors. With Thermal control system, the PM motor could work safely in low temperatures. This could protect permanent material from demagnetization.

Cooling oil flow chart

• Low temp. cooling oil adsorb heat from the motor shell, no cooling fan needed for motor
• Oil then pass through airend, adsorb heat from airend, then go through after cooler

Conclusion

When today&#;s focusing is on saving energy, Permanent magnet motors are now the most energy-efficient motors for air compressors. Atlas Copco Bolaite has taken measures to ensure that your motor is fully protected in high temperature working conditions. Now it&#;s the best way to approach energy efficiency with Atlas Copco Bolaite oil cooled PM motor air compressors.

Product Introduction

The benefits of permanent magnet VSD screw air compressor:

The permanent magnet motors offer increased energy efficiency compared to conventional asynchronous motors. The efficiency of permanent magnet motor average increase by 5%-10%, so that it could save a large amount of electrical cost for the user. The permanent magnet motor also features a compact construct, less size, lightweight, and high reliability.

The air compressor uses permanent magnet frequency conversion technology, if the user does not need so much compressed gas, the inverter will reduce the speed of the motor, reduce the amount of gas produced, and save electricity costs.

 While the fixed-speed air compressor will be an unloaded statute, and the motor runs 100%, reducing the damage to the motor from frequent startups, in the meantime it will waste a lot of energy. Also generates a lot of noise.

JAGUAR permanent magnet VSD screw compressor utilizes a permanent magnet motor for superior performance and extended lifespan.

Product specification:

ZLS75Hi+

Max air displacement: 8.9m3/min

Voltage: 380V50HZ/3 Phase

With competitive price and timely delivery, kapa sincerely hope to be your supplier and partner.

Power: 55KW/75HP

Pressure: 10BAR

Product parameters:

Product detail:

1. The air compressor uses high-efficiency permanent magnet motors and Inovance inverters.

2. The air discharge for Jaguar's low-speed screw air-end increase by about 10% compared to ordinary air-end.

3. The screw air compressor adopts an efficient water cooling system to make the compressor run smoothly.

Our advantages:

We are an air compressor manufacturer with 30 years of manufacturing experience. We are committed to providing the market with energy-saving and high-quality air compressor products.

FAQ:

Q1. Please provide your agent's contact method in Vietnam; we need the oil separator.

A1. Thank you! Please provide the nameplate, could you provide me with your contact methods?

Q2. Please see the nameplate, my customer bought it.

A2. OK, Please see our agent contact method. He will provide you with the spare parts.

For more information, please visit Permanent Magnet Screw Compressor.