Title:
EXCITATION CONTROL DEVICE FOR ROTARY MACHINE
Document Type and Number:
Japanese Patent JPS5671497
Kind Code:
A
Abstract:
PURPOSE:To alleviate a shock to a generator at an overexcitation limiting time by supplying an overexcitation limiting signal in primary delay state. CONSTITUTION:A subtractor 16 subtracts a signal equal to the square of the rated field current from a signal squared by the field current. An operational amplifier 14 squares the deviation signal between the field current and the allowable field current. If the field current becomes higher than the allowable field current, a relay 11 is operated to open the contact 71b. Thus, an operational amplifier 21 integrates the signal of adding the outputs of the subtractor 16 and the amplifier 14. If the output of the amplifier 21 exceeds the set value, a relay 24 is operated, the deviation signal is applied through a primary delay circuit to an automatic voltage regulator 4. Thus, it can contribute to the recovery of the system voltage up to the limit of the capacity of the generator, and the shock to the generator can be alleviat ed at the excitation limiting time.
Inventors:
YAMADA TSUTOMU
Application Number:
JP14905579A
Publication Date:
June 15, 1981
Filing Date:
November 14, 1979
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H02P9/14; (IPC1-7): H02P9/14
Domestic Patent References:
| JPS5370316A | 1978-06-22 | |||
| JPS4938885A | 1974-04-11 |