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Patent Searching and Data


Title:
VVVF INVERTER DEVICE
Document Type and Number:
Japanese Patent JP2000245006
Kind Code:
A
Abstract:

To obtain a VVVF inverter device which can suppress the oscillation in a motor current when the device controls in racing.

A VVVF inverter device which controls the rotation of an induction motor is provided with a racing detector 1 which detects racing from the rotational frequency of the induction motor and outputs a detecting signal, a current pattern control section 2 which outputs a motor current pattern for setting a motor current based on the presence/absence of the racing detecting signal, and an effective value calculating section 3 which calculates an effective value from the motor current. The inverter device is also provided with a constant-current control system 8 which outputs a racing frequency correcting amount used for correcting a racing frequency from the deviation between the motor current pattern and the effective value of the motor current and a racing frequency calculating section 7 which calculates the racing frequency based on the racing frequency correcting amount.


Inventors:
KAYANO HIROYUKI
Application Number:
JP4599099A
Publication Date:
September 08, 2000
Filing Date:
February 24, 1999
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
B60L3/10; B60L9/24; H02P27/06; (IPC1-7): B60L9/24; B60L3/10; H02P5/41
Attorney, Agent or Firm:
Kaneo Miyata (2 outside)