Method for driving at least one inductive load using pulse width modulated control signals
US6667667B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2002 |
| Grant date | Dec 23, 2003 |
| Priority date | — |
| Expiry date | Apr 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1555
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for driving at least one inductive load using pulse width modulated control signals, via a PWM control unit, the control pulses of the PWM control signals connecting the load to and disconnecting it from a d.c. supply voltage via a semiconductor output stage. To prevent the formation of an a.c. voltage occurring on the d.c. supply voltage in the case of pulse-wise loading of the same by the PWM control signal, the PWM control unit is assignable a supplementary device including a storage capacitor and/or storage inductor having a semiconductor switch, and the semiconductor switch is controllable by the PWM control unit switch on one charging current circuit powered by the d.c. supply voltage for the storage capacitor and/or the storage inductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.