Nuclear engineering

Electrical engineering

Physics

Partial discharge

Aerospace engineering

Automotive engineering

Corona (planetary geology)

Engineering physics

Engineering

Magnet

Voltage

Actuator

Power (physics)

Aerospace

Insulation system

Materials science

Reliability engineering

Venus

Computer science

Quantum mechanics

Mechanical engineering

Astrobiology

IEEE Transactions on Transportation Electrification

The development of more electrical transportation systems requires rotating machines having higher efficiency and specific power. To date, this is achieved by feeding them with rising supply voltages with higher frequencies. This generalized strategy is introducing several challenges in the correct design of the insulation that is necessary for a reliable system. A major issue to be dealt with are partial discharges (PDs), an aging mechanism that can bring insulation to failure in short times. A solution often proposed by manufacturers involves the use of the so-called corona resistant (CR) materials, which supposedly can withstand PD activity. This article investigates the possibility of using CR magnet wires for electrical machines operating at reduced pressures, such as the actuators for primary control surfaces in more electric aircraft. The results show that CR insulations are characterized by an improved behavior at ground level but are not a viable option at reduced pressures.

The Challenges of Reliable Dielectrics in Modern Aerospace Applications: The Hazard of Corona Resistant Materials