10-07-2020 | Originalarbeit | Issue 4-5/2020
Application of five-phase PM synchronous machines in electrical traction drive systems
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Abstract
Three-phase electrical machines in traction applications on electrified passenger cars are operated in inverter-fed operation over wide speed ranges. With a high dynamic e-machine control and the operation with inverter switching frequencies above 10 kHz, high performance requirements can be achieved in terms of high drive dynamics, optimum operating points (⇒ system efficiency optimizations), satisfying torque accuracies and low parasitic effects (e.g., current ripple, harmonic losses, pulsating torques and magnetic noise). For these applications five-phase permanent magnet synchronous machines with a dual frequency operation can be drawn into account for an increase of the cost-benefit ratio on drive system level and further system benefits. In this contribution some base considerations regarding e-machine design and motor control are presented. The application of a third harmonic injection and the gained benefit is shown for a built-up and measured e-machine sample.