Title :
Variation of loss per cycle with pause time at the maximum flux density in electrical iron sheets
Author :
Takada, Shunji ; Sasaki, Tadashi
Author_Institution :
Dept. of Electron., Gifu Univ., Gifu, Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
Power losses of electrical iron sheets have been measured under controlled magnetizing conditions in which a waveform of magnetic flux density was controlled to be trapezoidal and symmetrical. The magnetizing frequency was varied from 200 Hz to 50 Hz by varying the time duration of the maximum flux density from 0 to 7.5 ms while keeping the time for flux change at 2.5 ms. The result shows that losses per magnetizing cycle increase with the duration of the pause time at the maximum flux density and that this increase of losses may be attributed to several magnetic relaxation phenomena and reversal of magnetizing direction
Keywords :
iron alloys; magnetic hysteresis; magnetic leakage; materials testing; silicon alloys; 0 to 7.5 ms; 50 to 200 Hz; Fe-Si alloys; controlled magnetizing conditions; electrical iron sheets; loss per cycle; magnetic relaxation phenomena; magnetizing frequency; maximum flux density; pause time; power losses; reversal of magnetizing direction; time duration; time for flux change; waveform of magnetic flux density; Density measurement; Electric variables measurement; Frequency; Iron; Loss measurement; Magnetic flux; Magnetic flux density; Magnetic properties; Pulse width modulation inverters; Voltage;
Journal_Title :
Magnetics, IEEE Transactions on
