Title:
CURRENT LIMITER
Document Type and Number:
Japanese Patent JPH09306711
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a current limiter in which almost equal partial currents flow through two operating resistors connected in parallel at a branch point, low-inductance resistor paths are overlapped in the same region of the resistors, and the partial currents flow in opposite directions, thereby reducing inductance. SOLUTION: PTC resistors 21, 22 are electrically insulated and has a slight space therebetween. The PTC resistors 21, 22 are constructed by metal braid, metallographic structure, or porous metal babbles and are kept at a proper operating temperature by blast air cooling. The meanders or resistor paths 21a to 21c and 22a to 22c of the PTC resistors 21, 22 are connected by electric contact bridges 23, 23' and 24, 24'. The sum current is divided into partial currents 11, 12 which are equal and flow in the opposite directions through the meanders 21a to 21c and 22a to 22c which are folded in the vertical direction. As a result, the PTC resistors 21, 22 have small inductance.
Inventors:
TOUUDORU BAIATOU
PEETAA ETSUTAA
RAINHARUTO FURIITO
HANSUUYURUKU BUIISUMAN
PEETAA ETSUTAA
RAINHARUTO FURIITO
HANSUUYURUKU BUIISUMAN
Application Number:
JP29635596A
Publication Date:
November 28, 1997
Filing Date:
November 08, 1996
Export Citation:
Assignee:
ABB RESEARCH LTD
International Classes:
H01C13/02; H01C1/08; H01C7/02; H01C7/12; H02H9/02; H02M9/02; (IPC1-7): H01C13/02; H01C7/02; H02H9/02
Attorney, Agent or Firm:
矢野 敏雄 （外２名）
Previous Patent: CHIP NETWORK ELECTRONIC DEVICE
Next Patent: MANUFACTURE OF ANISOTROPIC BONDED MAGNET PELLET
Next Patent: MANUFACTURE OF ANISOTROPIC BONDED MAGNET PELLET