ABB MS PMG Three-Phase Alternator

Product Overview

The ABB MS PMG is a medium-speed permanent magnet generator (PMG) and three-phase alternator engineered for 1–15 MW wind turbine drivetrains. By replacing rotor windings with permanent magnets, the unit eliminates the need for separate excitation systems, removing approximately 30% of total conventional generator losses. This architecture delivers premium efficiency across all turbine speeds while supporting higher power density in a compact footprint. ABB introduced the first MS PMG for Multibrid-type wind turbines in 2000 and has continuously refined the platform for utility-scale wind energy production.

Key Features

• Premium efficiency at all turbine speeds with no rotor excitation losses
• Proven reliability backed by more than 20 years of ABB PMG engineering experience
• Short-circuit withstand without permanent magnet demagnetization
• High overspeed endurance rotor design for harsh operating conditions
• Insulated bearing arrangement that prevents circulating currents
• Compact size enabling lighter nacelle integration and reduced tower-top mass
• Low maintenance with no brush gear or external excitation systems
• Maximum annual energy yield with the lowest lifetime cost of ownership

Practical Applications / How It Works

The ABB MS PMG operates as the core electrical machine in slower-speed drivetrains used by Multibrid-type and similar direct-drive or medium-speed wind turbines. The rotor, fitted with permanent magnets, rotates inside a stationary stator winding, inducing three-phase electrical output that is fed to the grid through standard power conversion equipment. Because no external excitation current is required, the system eliminates slip rings, brushes, and the associated excitation power supply.

Typical deployment scenarios include:

• Onshore and offshore wind farms in the 1–15 MW power class
• Direct-drive turbine platforms requiring reduced drivetrain complexity
• Hybrid renewable projects integrating wind with storage or marine energy systems
• Repowering initiatives where high-efficiency generators replace legacy induction units

Developers, utilities, and finance providers evaluating the cost of electricity produced over the plant lifetime benefit from the MS PMG's higher annual energy production, fewer service interventions, and reduced total cost of ownership.

Frequently Asked Questions (FAQ)

Q1: What power range does the ABB MS PMG cover? A: The ABB MS PMG is designed for 1–15 MW wind turbine applications, supporting a wide spectrum of utility-scale Multibrid-type drivetrains and similar medium-speed architectures.

Q2: How does a permanent magnet generator differ from a conventional alternator? A: Permanent magnet generators replace rotor windings with permanent magnets, eliminating the need for separate excitation systems and removing roughly 30% of total conventional generator losses for higher overall efficiency.

Q3: Can the MS PMG withstand short-circuit events without damage? A: Yes. The rotor is engineered for short-circuit withstand without demagnetization, and the bearing design avoids circulating currents, supporting long service life under grid fault conditions.

Q4: How can I obtain pricing and delivery information for the ABB MS PMG? A: Submit a Request Quote through Spare Parts Map with your required power rating, quantity, and project location. Our team will respond quickly with current availability, lead time, condition, and worldwide delivery options.

Why Source Through Spare Parts Map

Spare Parts Map supplies the ABB MS PMG and other industrial spare parts primarily to customers across Europe and global renewable energy markets. With more than 20 years of industry experience, the team responds to inquiries quickly, confirms technical compatibility, and ensures your order reaches you without supply chain disruptions. Every Request Quote is handled by specialists who verify part numbers, ratings, and certifications before shipment.