Title:
【発明の名称】サーボモータを駆動するインバータの回生抵抗の保護方法及び装置
Document Type and Number:
Japanese Patent JP3107831
Kind Code:
B2
Abstract:
A protecting method and apparatus for a regenerative resistor in which a regenerative resistor is satisfactorily protected from a thermal breakage caused by an over-regeneration by combining a protection of the regenerative resistor by a thermostat and a protection of the regenerative resistor by an analog simulation circuit and by coordinating protective regions of these two protections. The heat-responsive switch (2) stops power supply to a DC link (10) when the temperature of the regenerative resistor is increased to a predetermined value or greater value. The analog simulation circuit (1) is provided with a charge-discharge circuit to be charged and discharged in response to a regenerative pulse signal from a level detector (7), estimates the quantity of heat accumulated in the regenerative resistor (5) by means of the charge-discharge circuit, and stops power supply to the DC link (10) when a predetermined threshold value is exceeded by the estimated value. A fusing region of the regenerative resistor (5) is covered by at least one of the protective regions based on the heat-responsive switch (2) and the analog simulation circuit (1).
Inventors:
Naoyuki Suzuki
Shinichi Horikoshi
Shinichi Horikoshi
Application Number:
JP53237896A
Publication Date:
November 13, 2000
Filing Date:
April 30, 1996
Export Citation:
Assignee:
FANUC CORPORATION
International Classes:
H02H5/04; H02H6/00; H02P3/18; H02P3/22; H02H7/122; (IPC1-7): H02P3/18
Domestic Patent References:
| JP6013485A | ||||
| JP226340A | ||||
| JP2211083A | ||||
| JP63161886A |
Attorney, Agent or Firm:
Matsumoto Takemoto (4 outside)
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