Circuit for injecting simulating-noise signals in a power line
US4417207A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 13, 1981 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Mar 13, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/001
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A simulated-noise signal is injected in the power line of equipment under test without loss of AC power by the use of a series resonance circuit having a resonance frequency equal to the frequency of the AC power supply. The series resonance circuit is connected in the power line in parallel with the equipment, and a capacitor is connected to the power line in parallel with the series resonance circuit and the equipment. A switching element is used to short-circuit the resonance circuit when noise simulation is not carried out. For the simulation of lightening strikes the circuit further comprises a simulated-noise signal generator including a capacitor charged by a DC power supply, a first switching element to discharge the charge of the capacitor to the equipment, and a second switching element for establishing a by-pass of the discharging current. By closing the second switching element after the first switching element is closed, a square-wave signal is fed to the equipment. In order to simulate ringing-surge signals, the circuit includes a generator to generate a damped-wave signal similar to a ringing signal. This generator has a capacitor charged by a DC power supply, a swit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.