| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor drive unit capable of stably driving a system in an unstable state with an extremely light load or in a state with an extremely heavy load. <P>SOLUTION: The motor drive unit includes: an energization angle determination section 10 that determines the energization angle in a range between 120° or larger and smaller than 180° based on the terminal voltage generation timing obtained by a terminal voltage obtaining section 5; and a second waveform generating section 12 that outputs a second waveform signal using a frequency set by a frequency setting section 9 and the energization angle determined by the energization angle determination section 10. Since a corrected waveform signal is output in which the second waveform signal is corrected so that the terminal voltage obtained by the terminal voltage obtaining section 5 gets closer to a predetermined state, the current phase is stabilized in a wide load range; thus a stable motor drive unit is achieved. <P>COPYRIGHT: (C)2013,JPO&INPIT |
