SENSEFET for motor control
US12160196B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2022 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Feb 4, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/145
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Apparatus and associated methods relate to a Source Terminal Replication Compensation Circuit for simulating an accurate fraction of a load current. In an illustrative example, a Source Terminal Replication Compensation Circuit (STRCC) may be connected to a motor driving circuit. The STRCC, for example, may include a simulation transistor configured to have a simulated structure of a main transistor in a motor driving circuit. The STRCC may include, for example, a disturbance rejection module (DRM). The DRM may be connected to a source terminal of the sense transistor, and a source terminal of the main transistor. When the DRM is connected to a current sensing resistor, a sense current is generated as a predetermined fraction of a load current of the motor driving circuit, wherein the predetermined fraction is less than 1%. Various embodiments may advantageously reduce heat dissipations at the current sensor resistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.