High performance current sensing architecture for brushless motors
US11290043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2019 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Nov 8, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor controller for controlling the operation of a three-phase permanent magnet synchronous electric motor, wherein the three-phase permanent magnet synchronous electric motor is characterized by three phases A, B, C, and further wherein the three-phase permanent magnet synchronous electric motor is driven by regulating three phase currents iA, iB and iC for the three phases A, B, C, respectively, the motor controller comprising: a three-phase power supply for supplying the three phase currents iA, iB and iC a first sensor for sensing the phase current iA; a second sensor for sensing across the phase currents iB and iC; and a microcontroller for controlling the operation of the three-phase power supply so as to produce the three phase currents iA, iB and iC needed to operate the three-phase permanent magnet synchronous electric motor, wherein the microcontroller reads the outputs of the first sensor and the second sensor and adjusts operation of the three-phase power supply so as to produce phase currents iA, iB and iC which produce the desired torque in the three-phase permanent magnet synchronous electric motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.