High Voltage DC Generation Systems

Requirements

Nominal power 90kW
Voltage +/-270VDC with a midpoint Nominal speed 25,000 rpm Transients
Continuous
Ef ciency > 95 percent
Forced air and liquid cooling Operation from -45C to 280C
High availability
No re or motor burst
Least mass
No ITAR restrictions

Denis Ferranti Group is currently developing a bespoke system solution in accordance with DAL A for complex hardware and software.

Converter

• Multiplex bespoke converter

• Multiple barrier insulation systems protecting helicopter chassis and 28V network

• Barriers to burst

• CAN and ARINC compatible

• Independent controller for health monitoring of voltage, current and temperature

• Short circuit protection

• Environmental capability in accordance with platform vibration and DO160

• A bespoke control system covering the motor and generate functions

• Graphical user interface for software

• High availability and re criteria further developed for certification

• Liquid cooling system

Electric Machine

• Permanent magnet electric machine with optimised geometry, slot ll and materials (patent applied for fail-safe capability)
• Multiple barrier insulation system
• Burst containment
• High speed bearings
• Air and liquid cooling
• Flexible shaft
• Shear section
• Clutch
• High temperature components
• Optimised for increased slot fill and low ac losses
• Low mass
• High availability and re criteria further developed for certification