Shunt resistor device
US9293242B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 2012 |
| Grant date | Mar 22, 2016 |
| Priority date | — |
| Expiry date | Nov 9, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided is a voltage detection circuit, which can remove influence of error voltage caused by tiny amount of self-inductance existing in a shunt resistor, though in the resistor for large current usage, which is impossible to surface-mount on a voltage detection circuit board. The shunt resistor device comprises: a resistance body (11); a pair of main electrode (12) for flowing current to be monitored through the resistance body; a pair of detection terminal (13a) for detecting voltage caused in the resistance body; and a pair of wiring (23) each electrically connected to the detection terminal. And, a pair of voltage detection wiring consisting of the detection terminal (13a) and the wiring (23) is brought closer, at prescribed location, than distance between each of connection position of the pair of the detection terminal (13a) on the main electrode (12). A low-pass filter having resistance value (r) and capacitance (C) is provided at next stage after the pair of the wiring, and said low-pass filter having a relationship Le/R=C·r, when Le (=L−M) is the effective inductance, and R is the resistance value of the resistance body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.