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The output torque of an interior permanent magnet synchronous motor (IPMSM) can be controlled within its allowable range using a pulse-width modulation (PWM) inverter. In this paper, the effect of the load torque on the iron losses of an IPMSM is studied by investigating three driving conditions, namely no-current, no-load and load conditions. The experimental data demonstrates that a torque increase...
Co2FeAl0.5Si0.5 (CFAS) [1, 2], a full Heusler alloy with theoretical 100% spin polarization, has attracted great attention for its wide study in magnetic tunneling junctions and spin valves. Recently studies [1, 2, 3] have proved that B2 and L21-phase ensure the half-metallic property, while a range of 400∼600 °C annealing temperature is needed to obtain the ordered phases. High annealing temperature...
Exchange coupling between a ferromagnet (FM) and an anti-ferromagnet (AFM) in a FM/AFM system has attracted great interests in the last decades due to its great impact on spintronics applications. However, there is a lack of a complete physical picture due to the difficulty of probing the spin structure at the FM/AFM interface. Because the so-called spin frustration at the FM/AFM interface plays a...
Ironing rubber: Iminopyridine‐based FeCl2 catalysts catalyze the polymerization of 1,3‐dienes and provide stereoselective access to elastomers such as polyisoprenes, polymyrcenes, and polyfarnesenes. The choice of ligand determines the double‐bond geometry in the polymer repeating unit, which can be varied from trans/cis >99:1 to <1:99 (see scheme).
This paper presents a power loss study of a machine drive system using discontinuous pulse width modulation (DPWM) excitation. Pspice modeling has been used in the inverter loss prediction, and for the machine loss analysis, finite element analysis (FEA) is employed. All the analytical research of the machine drive system power loss has been verified by calorimetric measurements. This paper provides...
This paper presents an investigation into the losses in a three-phase induction motor under different pulse width modulation (PWM) excitation conditions. The impacts of sinusoidal PWM, space vector PWM and discontinuous PWM on machine loss are compared and studied. Finite element analysis simulations are employed to predict the machine losses with the loss breakdown analysis under different PWM schemes...
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