Electricity: motive power systems – Synchronous motor systems – Armature winding circuits
Reexamination Certificate
2010-10-05
2011-10-11
Leykin, Rita (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Armature winding circuits
C318S700000, C318S722000, C318S723000, C318S724000, C318S400010, C318S400070, C318S400140, C318S400320
Reexamination Certificate
active
08035330
ABSTRACT:
The synchronous motor driving apparatus including position sensors provided in the synchronous motor, a current polarity detection circuit for detecting the polarities of the currents in the respective phase windings of the synchronous motor, an inverter driving the synchronous motor, a motor speed calculation unit calculating the rotational speed of the synchronous motor depending on the output signals from the position sensors, a speed control unit outputting a first voltage adjusting component (q-axis current command value Iq*) to cause the rotational speed of the synchronous motor to approach a speed command value and a phase control unit outputting a second voltage adjusting component (d-axis current command value Id*) to cause the phase differences between the phases of the position sensor signals and of the currents in the respective phase windings of the synchronous motor to become a predetermined value.
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Table 3-6, p. 43, Chapter 3 of “Easy Way to Technology on Small Motors”, published by Ohm-sha.
Endo Tsunehiro
Hasegawa Hiroyuki
Maeda Daisuke
Mishima Mitsuhiro
Sakurai Kenji
Antonelli, Terry Stout & Kraus, LLP.
Hitachi , Ltd.
Hitachi Information & Control Solutions, Ltd.
Leykin Rita
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