Current control start up for pulse-width modulated systems
US6414860B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2001 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Jan 31, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S323/901
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A PWM current control circuit that determines whether a start-up time, during which an decreased current is being drawn, for a load has elapsed and providing a switch that supplies current to the load with a control signal that limits the current being drawn if the start-up time has not elapsed and providing a standard PWM control signal from a microcontroller if the start-up time has not elapsed. Excessive inrush current during the start-up period of the load is avoided while the current is maintained to be within a predetermined range during start-up and after the start-up time has elapsed the control is again turned over to the microcontroller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.