System and method to limit maximum duty cycle and/or provide a maximum volt-second clamp
US6922346B2 · kind B2 · utility
9Cited by
5References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2003 |
| Grant date | Jul 26, 2005 |
| Priority date | — |
| Expiry date | Jan 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A system and method are disclosed to limit a maximum duty cycle and/or provide a volt-second clamp for a pulse-width modulated (PWM) signal. Depending on the circuit topology, this approach can limit the absolute duty cycle or operate as a volt-second clamp in which the duty cycle is limited as a function of a variable input control voltage, such as a line voltage. The duty cycle can be selectively programmed by setting one or more external reference components, such as one or more respective resistors. Additionally, through component matching, desired clamping can be achieved with a high level of accuracy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.