Intelligent detection unit (iDU) to detect the position of a rotor controlled by pulse modulation
US9859826B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 3, 2016 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Mar 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2203/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control circuit for controlling an electric motor may include at least one switching device configured to receive, from a pulse modulation device, a pulse modulated signal and output, based on the pulse modulated signal and to the electric motor, a current. In some examples, a frequency of the pulse modulated signal is below a threshold frequency. The motor control circuit may also include a transient detection circuit configured to detect a current transient, and responsive to detecting the current transient, output a pulse. The motor control circuit may further include a pulse counter configured to update, based on the pulse, a value indicative of a position of a rotor of the electric motor; and output the value indicative of the position of the rotor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.