Device for controlling an electric motor
US10782652B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2017 |
| Grant date | Sep 22, 2020 |
| Priority date | — |
| Expiry date | Dec 13, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K24/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A control device for controlling an electric motor, the device comprising an inverter and a control module implementing a current servo-control loop for the electric motor; an excitation module producing an excitation signal; a synchro-transmitter comprising two coupling windings, an excitation winding constrained to rotate with a rotor of the electric motor, and three measurement windings, the excitation signal being applied to the excitation winding via the two coupling windings; three first synchronous demodulators, each connected to a respective one of the three measurement windings of the synchro-transmitter and to the excitation signal I, and each generating a current setpoint for the current servo-control loop for use by the control module; and three other synchronous demodulators, each connected to a respective one of the three measurement windings of the synchro-transmitter and to the excitation signal Q, and generating a signal providing information about the angular speed of the rotor of the motor for use by the control module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.