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Compared with traditional three-phase machine, multi-phase/multi-unit permanent magnet synchronous machine (PMSM) are more suitable for vehicle power system because that they provide higher output power, give better fault-tolerant ability and require lower output ratings of a single inverter. Usually, to validate motor design and manufacturing quality, several tests must be performed. Temperature-rise...
Inverter-based electrical-machine drives suffer from significantly higher losses compared to sinusoidal-supply-based alternatives, fed directly from the grid. Using multilevel inverters it becomes possible to partially mitigate the effects of the switched supply waveform, while keeping the advantages of variable-speed operation. This paper aims to evaluate the increase of the losses occurring in an...
This paper proposes a nonintrusive thermal monitoring method for induction machines (IM) with the direct torque control (DTC) scheme. The stator winding temperature is estimated by injecting a small DC current offset into the machine winding. Since DTC strategy does not have explicit current control loops, the primary challenge is how to inject the desired DC current via existing torque and flux loops...
A robust torque sensor with rapid response was constructed by forming magnetostrictive layers and mounting coils on a carbon steel shaft. A sensitive and reliable Fe40Ni56Cr4 magnetostrictive layer was formed using a low-pressure plasma spray method. A magnetic field perpendicular to the magnetostrictive layer plane is generated by a current flowing through the twin coils to magnetize the steel shaft...
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