Circuit for sensing motor load current
US5900714A · kind A · utility
18Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1997 |
| Grant date | May 4, 1999 |
| Priority date | — |
| Expiry date | Nov 4, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A current sensing circuit including a shunt resistor coupled, at one end, to the low-side transistor of a half bridge circuit and, at its other end, to a load. The voltage sensed across the shunt resistor is proportional to the current delivered to the load. A level shifting circuit is provided to transpose the sensed voltage to a low voltage signal which can be fed back to control commutation of the transistors in the half bridge circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.