Iron Loss and Hysteretic Properties under PWM Inverter Excitation at High Ambient Temperatures

Abstract

We experimentally and numerically investigate the magnetic properties of magnetic materials excited by sinusoidal and pulse width modulation (PWM) inverter input at high ambient and room temperatures. We show that the iron losses under sinusoidal and PWM inverter excitations decrease with an increase in temperature. It is found that the temperature dependency of iron loss properties is related not only to major loop but also to minor loops. Furthermore, we derive the numerical expression for the hysteretic properties of the PWM inverter-and sinusoidal-fed ring tests at room temperature and 300• C by using the play model with the Cauer circuit.

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

“…High temperature (HT) motor systems have been extensively studied [1][2][3][4][5][6] . Motors are generally driven by a pulse-widthmodulation (PWM) inverter to control torque and rotational speed.…”

“…Thus, it was important to accurately measure and simulate the magnetic hysteresis and iron loss properties. Recently, we have shown that iron loss of conventional non-oriented (NO) electrical steel sheets and amorphous magnetic materials (AMM) excited by PWM inverter decreases in tandem with an increase in temperature 4,6) . Previous studies have also shown that in NO sheets and AMM, the area of minor loops in hysteresis loops diminishes as the temperature increases 4,6) .…”

“…Recently, we have shown that iron loss of conventional non-oriented (NO) electrical steel sheets and amorphous magnetic materials (AMM) excited by PWM inverter decreases in tandem with an increase in temperature 4,6) . Previous studies have also shown that in NO sheets and AMM, the area of minor loops in hysteresis loops diminishes as the temperature increases 4,6) . This study focuses on the temperature dependence of iron loss and the magnetic hysteresis properties of nanocrystalline magnetic materials (NMM) under PWM inverter excitation.…”

“…The ring specimen is composed of NMM (FT-3M), cut into a ring shape by wire electric discharge machining 16) . The height, inner diameter, and outer diameter of the ring core of NMM are 7, 102, and 127 mm, respectively 4,6,16) . The space factor ξ sf of the NMM ring core is approximately 87.3%.…”

Core Losses of a Nanocrystalline Motor under Inverter and Sinusoidal Excitations

“…In order to control the rotational torque and speed of the motor, pulse width modulation (PWM) inverters are usually used. In the recent times, several researchers have shown that the iron losses of the magnetic core under PWM inverter excitation increase due to time harmonic components [17][18][19][20][21][22][23][24][25][26][27][28][29] . Therefore, it is necessary to estimate the influence of time harmonic components in the motor with NMM to develop the low loss motor systems.…”