Method for driving non-linear load elements based on load current
US8508259B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2008 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Dec 8, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0036
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for driving a non-linear load element. On account of the non-linear interrelationship between the voltage and the current at the load element and the related non-linear dependence of the power loss on the quantities “voltage” and “current”, an adjustment of the switching speed only on the basis of the power loss in the switching element cannot be carried out with non-linear load elements without being confronted with undesirable switching losses and related electromagnetic noise fields. Therefore, the load current currently flowing in the load element is picked up in addition to the currently determined power loss in the switching element, and the switching speed of the switching element is controlled in dependence on the determined power loss and on the current picked up. The switching speed can be optimally adjusted when driving the non-linear load elements by means of PWM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.