Electricity: motive power systems – Motor load – armature current or force control during... – Initial – 'cracking' or 'starting from rest' torque control
Patent
1993-09-09
1995-03-07
Ro, Bentsu
Electricity: motive power systems
Motor load, armature current or force control during...
Initial, 'cracking' or 'starting from rest' torque control
318254, H02P 118
Patent
active
053961595
ABSTRACT:
A method of starting a motor comprising a first starting step of supplying an exciting current to armature coils, a first holding step for holding the exciting current after the first starting step, a second starting step of supplying an exciting current to the armature coils after the first holding step, a second holding step of holding this exciting current after the second starting step, and a third starting step of supplying an exciting current to the armature coils after the second holding step. In this method, the frequency f.sub.1 of the first holding step is larger than the characteristic frequency F.sub.0 of the rotation system of the motor (f.sub.1 >F.sub.0) and the frequency f.sub.2 of the second holding step is smaller than the characteristic frequency F.sub.0 of the rotation system (f.sub.2 <F.sub.0).
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Nippon Densan Corporation
Ro Bentsu
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