Description
- Product Model: IS215WEPAH1BB
- Manufacturer: GE
- System Platform: Mark VIe Wind Turbine Control
- Power Supply Voltage: 24 V DC nominal (extended tolerance for nacelle variations, typically 18-32 V DC)
- Power Consumption: Optimized for pitch actuator drive, approximately 20-50 W depending on load
- Operating Temperature Range: -30°C to +65°C, suited for nacelle-mounted operation under extreme wind conditions
- Humidity Tolerance: Up to 95% non-condensing, with conformal coating for protection against condensation and salt in offshore/onshore environments
- Torque/Actuator Rating: Designed for 30/40 Nm pitch motors, providing precise blade angle control
- Communication Interfaces: CANbus protocol for high-reliability data exchange with pitch master controller and sensors
- Analog Inputs/Outputs: Differential analog channels for position feedback, current sensing, and command signals with noise minimization
- Servo Drive Capability: Integrated power amplification for direct drive of pitch hydraulic or electric actuators
- Signal Conditioning: Built-in isolation, filtering, and amplification to handle EMI from variable-frequency drives
- MTBF: High-reliability rating typical of Mark VIe wind pitch hardware (>150,000 hours in cyclic duty)
- Certifications: Compliant with IEC 61400 wind turbine standards (where specified), CE marking, and industrial harsh-environment qualifications
- Dimensions: Compact PCB form factor optimized for pitch cabinet or hub mounting
- Weight: Lightweight (typically under 2 kg), facilitating safe handling during hub or nacelle access
- Protection Features: Conformal-coated assembly resistant to vibration, dust, and moisture ingress
Technical Architecture & Functional Positioning
The IS215WEPAH1BB functions as a dedicated pitch axis controller (WEPA – Wind Energy Pitch Axis) within the Mark VIe distributed architecture for wind turbines. It is typically located in the pitch drive cabinet or hub, serving as the interface between the central turbine controller and individual blade pitch actuators. This board handles closed-loop control of blade pitch angle, critical for aerodynamic performance, load mitigation, and overspeed protection in variable-speed turbines.
Core technology incorporates CANbus for deterministic, fault-tolerant communication with the pitch master system, combined with analog servo amplification circuits to drive 30/40 Nm motors or hydraulic valves. The design includes high-precision differential inputs for position encoders and current feedback, enabling accurate torque and speed regulation. Isolation and filtering techniques minimize interference from power switching in the hub, ensuring stable loop performance during rapid pitch changes.
From an engineering viewpoint, this module addresses key wind challenges: precise blade feathering during high winds or faults, fatigue load reduction through individual pitch control, and reliable operation in rotating hub environments with centrifugal forces and temperature swings. The CANbus variant enhances system integration by supporting networked pitch synchronization across blades, reducing cabling complexity and improving diagnostic capabilities compared to non-CAN versions.
Typical Application Scenarios
- Pitch control in GE onshore and offshore wind turbines (1-3+ MW class) for blade angle adjustment, optimizing energy capture and structural load management.
- Used in DFIG variable-pitch systems to execute emergency feather commands during grid faults or overspeed events.
- Serves as replacement or repair part in existing Mark VIe wind fleets, maintaining original CANbus interfaces and actuator compatibility.
- Applied in hub-mounted pitch drives requiring robust EMI immunity and vibration resistance for long-term reliability.
- Utilized in wind farm upgrades or life extensions where precise pitch response supports advanced control strategies like wake steering.
Quality Standards & Testing Procedures
Pitch control electronics are mission-critical—failures can lead to blade damage, turbine shutdown, or safety risks at height. Our verification emphasizes actuator drive stability, communication integrity, and environmental endurance to match GE wind standards.
Visual Inspection & Cleaning
Boards inspected for coating integrity, solder joint fatigue, connector corrosion, or vibration wear; cleaned ESD-safe to preserve protective conformal layers.
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