High speed permanent magnet generators, Technical data

Performance characteristics of the AMG family:

Frame size 500 and 560
Power 1.5 to 3.6 MW
Cooling air or water cooling
Mounting and protection IM1001 (inclined 4...6 deg), IP54
Voltage

690 V +/- 10 %, 50 or 60 Hz
Medium voltage (i.e. 4 kV)
Rated speed options from 1000 to 1800 rpm
Operation speed range 0 ... 2000 rpm
Max. overspeed up to 3000 rpm
Insulation class/Temp.rise        F / B
Ambient temperature  -20oC ... +40oC; extended -30oC ... +50oC
Max dimensions, weight

500: max L2800 x W1800 x H1900 mm, 5 - 7 tn
560: max L3500 x W2500 x H2300 mm, 7 - 10 tn


ABB has 20 years of experience in PM Technology, which enables us to use optimized, cost-efficient low magnet mass designs and still offer the highest performance in the markets. Our HS PM rotor is designed for the highest fatigue and peak loads with overspeeds up to 3000 rpm. We use special magnet modules for maximum corrosion protection and reliable fastening of magnets. Our global, long-term supply agreements for magnet material secures capacity, availability and cost control.
Our 30 years of experience in demanding converter applications ensure full electrical compatibility for the generator-converter package.

The proven ABB family of 1.5 – 3.2 MW HS PMG generators has been designed to fit most turbines used today. The standard modular structure - with both air or water cooling - can be modified for different turbine interface connections. Patented ABB PM rotor technology has proven short circuit withstand without demagnetization. The design is rigid to withstand higher overspeeds. ABB HS PM generators offer reliable, cost-efficient solutions with fast delivery times.

Customer specific generators are available by request from 500 kW up to 7 MW.

High Speed drivetrain:
Using a proven standard high speed (HS) drivetrain provides flexibility in turbine concept selection. The HS PMG system is mechanically similar to doubly-fed one. It offers turbine OEM´s a fast-track from DF to gain all the benefits of full converter (FC) concept without extensive re-engineering. It enables easy logistics, assembly and low crane cost. Using same drivetrain for all turbine sizes also results in standardization and globally identical production lines.

The PM generator :
PM generators are synchronous machines with rotor windings replaced by permanent magnets. They need no separate excitation so rotor excitation losses – about 30% of total generator losses – are eliminated. This results in high power density and small size with the highest efficiency at all speeds, offering the maximum annual production of energy with the lowest lifetime cost.

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