Generating system including generator having permanent magnet

Details Generating system including generator having permanent magnet Generating system including generator having permanent magnet

1997-06-05

2000-03-28

Ponomarenko, Nicholas

Electricity: single generator systems

Automatic control of generator or driving means

Voltage of generator or circuit supplied

322 33, H02P 914

Patent

active

060436328

ABSTRACT:
A permanent magnet made of ferrite magnet material used for a generator may be irreversibly demagnetized by a factor such as current supplied to a field coil, temperature of the permanent magnet and/or output current of an armature coil. When the field current exceeds a preset value, and also the output current exceeds a preset value, the field current is limited to prevent the irreversible demagnetization. Thus, the irreversible demagnetization of the permanent magnet can be prevented, while ensuring a sufficient amount of the output power. It is also effective that the field current or armature current is limited when the temperature of the permanent magnet is in a range of possible irreversible demagnetization.

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