Title:
METHOD AND APPARATUS FOR ESTIMATING SPEED OF INVERTER DEVICE MOTOR AND VECTOR CONTROLLER OF MOTOR USING THE SAME METHOD
Document Type and Number:
Japanese Patent JP3160778
Kind Code:
B2
Abstract:
PURPOSE: To enhance a response speed 4 estimating and controlling speed.
CONSTITUTION: An output frequency command value Vq* is input, and a value Vq' corresponding to a q-shaft voltage command value Vq* is obtained by a q-shaft voltage command calculator 12a. The detected value Iq of a q-shaft current component is input, and a leakage impedance voltage drop due to the q-shaft current of an induction motor is obtained by a voltage drop calculator 12b. The difference between the voltage drop and Vq' by a subtracter 12c is obtained as a speed electromotive force estimated value E'. The value E' is converted into a speed estimated value ω' by a speed converter 12d. Thus, since a speed control system is separated from a current control system to estimate the speed of a motor, the response speed of speed estimation can be arbitrarily enhanced, and since response speeds of the speed control system and the current control system can be set separately from the speed estimation, the speed control of high response speed can be realized.
Inventors:
Kazuaki Tobari
Toshiaki Okuyama
Toshiaki Okuyama
Application Number:
JP24922092A
Publication Date:
April 25, 2001
Filing Date:
September 18, 1992
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H02P21/00; H02P21/18; H02P21/22; H02P21/24; H02P23/07; H02P23/16; H02P27/04; H02P27/08; (IPC1-7): H02P21/00
Domestic Patent References:
| JP6387192A | ||||
| JP2262887A |
Attorney, Agent or Firm:
Tatsuyuki Unuma