Multiphase DC motor and starting method thereof
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United States of America Patent
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May 28, 1996
Grant Date -
N/A
app pub date -
Dec 6, 1993
filing date -
Dec 7, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A starting method for starting a multiphase DC motor having a stator provided with stator coils, a rotor provided with a rotor magnet and detector for detecting revolutions of the rotor, has stepping process and acceleration process. In the stepping process, a plurality of stepping steps is performed. The accelerating process is performed after the stepping process is completed. The plurality of the stepping steps include counter-exciting operation. Each of the plurality of stepping steps is provided by a rotation detection step. The stepping process is completed and the accelerating process is performed when a rotation detector detects that the revolutions of the rotor exceeds a predetermined value.
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