Fast response motor current regulator
US5079494A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1989 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | Aug 31, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/15
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
High speed fast response PWM current control regulation methodology and circuitry samples the required peak motor current value from a previous PWM cycle and calculates the required peak motor current value for the present PWM cycle and repeats the sampling and calculating every PWM cycle and updates the new required peak motor current value every PWM cycle. The required peak motor current value for the present PWM cycle is calculated according to the equation EQU I(peak present)=I(command)+0.5I(peak last)-0.5I(turn-on), where I(peak present) is the required peak motor current value for the present PWM cycle, I(command) is the commanded motor current value, I(peak last) is the previous required peak motor current value from the immediately preceeding PWM cycle, and I(turn-on) is the turn-on motor current value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.