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Synchronous Motors
Low-Speed Brushless Synchronous Motor for Compressors, 450-30,000 kW
Wolong low-speed brushless-excitation synchronous motor for reciprocating compressors: 450 - 30,000 kW, 150 - 500 r/min, 3 - 11 kV, Ex ec / Ex pxb / Ex pzc, IECEx, ATEX and CCC.
- Genuine Wolong NanyangOriginal factory nameplate, test report and documents
- Certified for hazardous areasATEX, IECEx, CSA, EAC, CNEX and CCC certificates held by Wolong Nanyang
- Model check in 24 hoursEngineers match power, voltage, Ex marking and mounting
- Worldwide deliverySeaworthy export packing, CIF or with your forwarder
Product Description
Wolong's low-speed brushless-excitation synchronous motor is designed for reciprocating compressors and other slow, high-torque drives. A large flywheel effect smooths the pulsating torque of the compressor and keeps current pulsation low; the brushless excitation needs no slip rings and no brush maintenance.
It is available as a safe-area motor or in hazardous-area versions with increased-safety (Ex ec) or pressurized (Ex pxb, Ex pzc) protection, and is used in oil, coal, chemical, metallurgy, power and water plants.
Key Specifications
| Rated power | 450 - 30,000 kW (600 - 40,000 hp) |
|---|---|
| Speed range | 150 - 500 r/min |
| Rated voltage | 3000 - 11,000 V |
| Explosion protection | Ex ec, Ex pxb, Ex pzc, or safe area |
| Cooling | IC81W, IC616, IC611 |
| Protection | IP21 to IP56 |
| Rotor | Forged steel (45 #) |
| Mounting | IM 1001, IM 7315, IM 7115 |
| Bearings | Pedestal sleeve bearings |
| Standards | GB, IEC, EN |
| Certification | CCC, IECEx, ATEX |
| Ambient | -20 to +40 °C standard, -60 to +60 °C to order; up to 1000 m standard, 1000 - 5000 m to order |
Design Features
- Several sealing measures for low purge-gas leakage
- Large flywheel-effect design and brushless excitation system
- Additional measures to raise explosion safety
- Low vibration, low noise, high efficiency, low current pulsation and low starting current
- Removable excitation system and dedicated inspection openings for easy maintenance
- Large terminal box
TAW, TZYW or This Series?
The TAW (increased safety) and TZYW (pressurized) series cover 450 - 15,000 kW with full published data. This series is the current platform for compressor drives up to 30,000 kW and speeds down to 150 r/min. Send us the compressor data (power, speed, torque-angle curve or current-pulsation limit) and we select the right machine.
Applications
Reciprocating compressors in refineries, gas processing, chemical and fertiliser plants, and other low-speed, high-power drives.
Explosion Protection Explained
In a pressurized enclosure ("p") the motor is first purged with clean air or inert gas and then kept at a slight over-pressure, so the surrounding explosive atmosphere cannot enter. A control unit blocks the start until purging is complete and alarms or trips if the pressure is lost. Ex px (Gb) is used in Zone 1 and Zone 2, Ex pz (Gc) in Zone 2.
Common Questions
What power range does the this motor cover?
The this motor covers 450 - 30,000 kW (600 - 40,000 hp).
Which voltages are available for the this motor?
Rated voltage: 3000 - 11,000 V. Other voltages can be checked on request.
Which explosion protection does the this motor have?
The marking is Ex ec, Ex pxb, Ex pzc, or safe area. Tell us the zone, gas group and temperature class of your site and we confirm the right version.
How is the this motor cooled?
Cooling method: IC81W, IC616, IC611.
What is the degree of protection?
Standard protection is IP21 to IP56.
Documents Supplied with the Motor
For each order we can provide the technical data sheet, outline drawing, routine test report and, for explosion-proof motors, a copy of the Ex certificate that matches the nameplate marking. Tell us in the inquiry which documents your project or your inspector requires, so they are prepared before shipment.
Related Products
- TAW Increased-Safety Brushless Synchronous Motor, 450-15000 kW
- TZYW Pressurized (Ex p) Brushless Synchronous Motor
How to Order
For a fast, accurate quotation please send: rated power (kW), voltage and frequency, number of poles or speed, Ex marking or hazardous zone, mounting type, quantity and destination port. For a replacement, a photo of the old motor nameplate is the quickest way to match it. Lead time (about 80 days), documents and shipping are explained on our Export Service page.
Frequently Asked Questions
Do your explosion-proof motors have ATEX and IECEx certificates?
Yes. Wolong Nanyang explosion-proof motors, both low-voltage and high-voltage, are available with ATEX and IECEx certificates for Europe and international projects, and GOST for the Russian market. Tell us which certificate you need when you ask for a quote.
Can this motor replace my existing motor?
Yes. For new projects we quote and select the model to your requirements. For a replacement, please send a nameplate photo or outline drawing of the old motor, and we will match the shaft height, mounting and installation dimensions.
Can you supply replacements for Schorch, Brook Crompton or Morley motors?
Yes. Schorch, Brook Crompton and Morley belong to the Wolong Electric Group, and we can supply Wolong motors built to replace them, matched to your mounting dimensions.
Can you ship to my country, and what is the lead time?
Yes. We ship worldwide on CIF terms, or you can use your own forwarder. The usual production time is about 3 months, depending on the model and quantity.
What information do you need for a quotation?
Rated power (kW), voltage and frequency, number of poles or speed, Ex marking or hazardous zone, mounting type (e.g. B3, B35, V1), quantity and destination port. A nameplate photo of the old motor helps if it is a replacement.
Get a Quote for Low-Speed Brushless Synchronous Motor for Compressors, 450-30,000 kW
Send us your requirements. An engineer will reply with a model check and price within 24 hours.
