DRIVES AND FREQUENCY CONVERTERS
Perfect Pitch — electric blade pitch systems for wind turbines 0.75–15 MW
Country: Italy · Model: Perfect Pitch
The Perfect Pitch electric blade pitch system controls the blade pitch angle of wind turbines from 750 kW to 15 MW. It is installed on onshore, offshore and tidal turbines, both on new machines and when upgrading pitch systems of turbines already in operation.
- Turbine power
- 750 kW – 15 MW; onshore, offshore and tidal
- Composition
- pitch drives (AC, DC, servo converters), motors, control, backup power (batteries or own UltraCap)
- Certification
- UL 508C, CSA C22.2 No. 14-10
- Drive operating temperature
- -30…+60 °C
Technical specifications
| Turbine power | 750 kW – 15 MW; onshore, offshore and tidal |
|---|---|
| Composition | pitch drives (AC, DC, servo converters), motors, control, backup power (batteries or own UltraCap) |
| Certification | UL 508C, CSA C22.2 No. 14-10 |
| Drive operating temperature | -30…+60 °C |
| Climate versions | cold, hot, normal |
| Drive functions | DC link charging, brake control, 24 V DC 12 A supply, backup charger, monitoring of mains and backup, motor and cabinet temperature |
| Spare parts | up to 30 years |
| Production | Salzbergen (Germany) |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The system includes pitch drives in AC, DC or servo versions, motors, a control system and backup power from batteries or UltraCap supercapacitors of own design. The backup is needed to feather the turbine out of the wind if the mains fails, since the pitch system is also the main brake of the wind turbine. In operation it turns the blades depending on wind speed and direction, and as speed rises it increases the pitch angle and keeps the turbine within rated power. The drive charges the DC link itself, controls and monitors the motor brake, has a 24 V DC 12 A supply, a charger for the backup source and direct control of 24 V contactors. It monitors the mains and backup voltage, the motor and cabinet temperature, and withstands shocks and vibration. The platform is scalable, has extended diagnostics, automated testing, battery life-cycle management and can accept data from BladeVision blade sensors. AC, DC and servo drives for such systems have been developed for more than 25 years, and the control cabinets for the nacelle and tower are assembled in Salzbergen (Germany) at a site certified as a UL Panelshop.
How to choose
The configuration is determined by the turbine power, the type of installation and the site climate. The systems are made in cold, hot and normal climate versions and are designed to a target cost, so the composition for a 15 MW offshore machine and for a 750 kW onshore one will differ. The drive type (AC, DC or servo) and the backup source, batteries or UltraCap, are set at the project stage, including when upgrading a turbine that is already running.
Request a price and lead time
Perfect Pitch — electric blade pitch systems for wind turbines 0.75–15 MW. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does the pitch system stop the turbine when the mains disappears?
Batteries or UltraCap supercapacitors power the pitch drives, and these feather the blades out of the wind. The drive constantly monitors the backup voltage and recharges it itself with a built-in charger.
What certificates does the Perfect Pitch system have?
The systems are approved to UL 508C and CSA C22.2 No. 14-10. Cabinets for the nacelle and tower are made at a site certified as a UL Panelshop.
In what temperature range does the pitch drive work?
The drive operating temperature is from -30 to +60 °C, and for extreme conditions there are cold and hot climate versions.
For how long are spare parts supplied for Perfect Pitch pitch systems?
Spare parts are supplied throughout the life cycle of the turbine, up to 30 years.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.