Title:
【発明の名称】車両用電動機の制御装置
Document Type and Number:
Japanese Patent JP2752539
Kind Code:
B2
Abstract:
A control apparatus for an induction motor and an electric car propelling motor includes an inverter for supplying a driving current to the induction motor on the basis of a predetermined control signal, a rotational speed sensor for detecting a rotational speed of the induction motor, a V/f control circuit responsive to an input speed command signal for producing a control signal for the inverter, a vector control circuit for producing an inverter control signal on the basis of the speed command signal and the rotational speed signal of the rotational speed sensor, an abnormality detecting circuit for detecting abnormality of the rotational speed sensor. A change-over circuit having inputs supplied with outputs of the V/f control circuit and the vector control circuit, respectively, selects the inverter control signal from the V/f control circuit in response to detection of abnormality of the rotational speed sensor while selecting the inverter control signal supplied from the vector control circuit so long as no abnormality is detected in the rotational speed sensor.
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Inventors:
KAJIWARA KENZO
HAMANO HIROSHI
YAMAMURA HIROHISA
MASAKI RYOZO
HAMANO HIROSHI
YAMAMURA HIROHISA
MASAKI RYOZO
Application Number:
JP26816791A
Publication Date:
May 18, 1998
Filing Date:
September 21, 1991
Export Citation:
Assignee:
HITACHI SEISAKUSHO KK
International Classes:
B60L3/00; B60L15/02; B60L15/20; H02P21/00; H02P21/22; H02P23/07; H02P23/16; H02P27/04; H02P27/06; H02P27/08; (IPC1-7): H02P21/00; B60L3/00; B60L15/20; H02P5/41
Domestic Patent References:
| JP454890A | ||||
| JP2266884A |
Attorney, Agent or Firm:
Kenjiro Take