Adaptive compensation of dead time for inverter and converter
US6535402B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2002 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Jul 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M1/385
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The invention relates to the compensation of dead time effect in electronic appliances such as inverters or converters having one or more legs with two complementary switches. The invented method mainly includes following steps providing an initial pulse width modulated (PWM) reference, providing a bias current and detecting the bias current crossing points, providing a dead time compensation signal which is adjusted responsive to the crossing points, and adding the dead time compensation signal to the PWM reference. Hence an adaptive compensation is accomplished independent of types of switching elements and load conditions. A high reliable circuit with low cost is further included as a preferred embodiment of bias current crossing points detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.