Core losses of a permanent magnet synchronous motor with an amorphous stator core under inverter and sinusoidal excitations

Abstract

We report core loss properties of permanent magnet synchronous motors (PMSM) with amorphous magnetic materials (AMM) core under inverter and sinusoidal excitations. To discuss the core loss properties of AMM core, a comparison with non-oriented (NO) core is also performed. In addition, based on both experiments and numerical simulations, we estimate higher (time and space) harmonic components of the core losses under inverter and sinusoidal excitations. The core losses of PMSM are reduced by about 59% using AMM stator core instead of NO core under sinusoidal excitation. We show that the average decrease obtained by using AMM instead of NO in the stator core is about 94% in time harmonic components.

Core Losses of a Nanocrystalline Motor under Inverter and Sinusoidal Excitations

“…See Refs. 2,12,14,15) for the details of design and fabrication process of rotor and stator cores. Figure 3 shows the schematic of the PMSM and its control system under no-load condition.…”

“…The losses in the driving electric motors mainly consist of mechanical, copper, and core losses (iron losses). Recently, in order to reduce core losses of the motors, the motors based on core with amorphous magnetic materials (AMM) [1][2][3][4][5][6][7][8][9][10][11][12] and nanocrystalline magnetic materials (NMM) [13][14][15] have been developed and examined. NMM and AMM exhibit lower iron loss 16) than nonoriented (NO) silicon steel sheets.…”

“…Thus, the next phase is to correctly understand the core loss properties of the motor with NMM core "under sinusoidal excitation". Since the motor core loss under sinusoidal excitation does not have time harmonic components, the evaluation of the sinusoidal-excited motor can obtain the smallest core losses of the motor core at the same experimental conditions (the same speed, torque, and vector control method) 12) .…”

“…In addition, by comparing losses under inverter and sinusoidal excitations, we can experimentally estimate the core losses caused by time harmonic components 12) . Because of a deterioration of the iron losses caused by the manufacture process and so on 15) , it is difficult to accurately obtain the core loss of the NMM motor based on iron losses of the materials by numerical simulations.…”

Iron Loss and Magnetic Hysteresis Properties of Nanocrystalline Ring Core at High and Room Temperatures Under Inverter Excitation

“…PWM inverter outputs have higher harmonic components superimposed in fundamental waveforms. Many studies have reported that, due to high harmonic components, iron loss of the motor core under PWM inverter excitation increases [7][8][9][10][11][12][13][14][15][16][17] by 10%-50% 10) compared with sinusoidal excitation. In these researches, magnetic hysteresis loops had many minor loops.…”