Current detection resistor, mounting structure thereof and method of measuring effective inductance
US6798189B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 13, 2002 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Jul 3, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/0092
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A mounting structure for current detection resistor device has a feature that voltage detection terminal wiring is configured so as to extend along a current path in the resistor body first, and then, to bend at right angles to the current path, while maintaining electrical isolation from a resistor body of the current detection resistor device. The voltage detection terminal wiring connecting to the voltage detection terminals on the circuit board is disposed to extend for some distance in the same direction as the current path so as to cause mutual-inductance between that section of the voltage detection terminal wiring and the resistor body. This causes cancellation of induced voltage caused by the self-inductance of the resistor body, so that it is possible to nullify detection error generated by the voltage induced by the resistor body from the viewpoint of the measuring system. Therefore, it is possible to detect a large current with good accuracy that may flow in a device such as a current detection resistor device for a switching power source operating at high frequencies. A method is provided for measuring a value of effective inductance that includes the steps of: supplyi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.