Title:
INVERTER CONTROL APPARATUS
Document Type and Number:
Japanese Patent JPH10164885
Kind Code:
A
Abstract:
To obtain an inverter control apparatus by which an offset can be cancelled without being influenced by a remanent magnetic flux even when a current detector such as a low-cost Hall element or the like is used.
Whenever an elevator is stopped, the offset amount of a current detector is stored in a storage means 18. Whenever the elevator is stopped, an offset-correction-amount computing means 19 computes a mean value on the basis of ten latest offset amounts stored in the storage means 18, and the mean value is used as an offset correction amount. The offset correction amount is outputted as a correction signal 17a, and the offset of a detection signal 5a is cancelled.
Inventors:
TETSUYA YUJI
MATSUMOTO NORITOSHI
HAYASHI YUTAKA
MATSUMOTO NORITOSHI
HAYASHI YUTAKA
Application Number:
JP33762396A
Publication Date:
June 19, 1998
Filing Date:
December 02, 1996
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
FUJITEC KK
FUJITEC KK
International Classes:
B66B1/30; H02P27/06; (IPC1-7): H02P5/41; B66B1/30