Ripple counter with dynamic bandpass filter for DC motor
US11811342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2020 |
| Grant date | Nov 7, 2023 |
| Priority date | — |
| Expiry date | Apr 30, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed is a ripple counter with a dynamic bandpass filter for a DC motor. The ripple counter includes a current sense amplifier configured to provide an analog voltage responsive to an inline current in rotor windings of the DC motor. The ripple counter also includes an analog-to-digital converter configured to provide a digital signal responsive to the analog voltage. The ripple counter also includes a digital filter configured to receive the digital signal and a clock signal and configured to vary a frequency response to provide a filtered ripple current. The ripple counter also includes a digital comparator circuit configured to receive the filtered ripple current and to provide a pulsed output. The ripple counter also includes a clock generator configured to detect the frequency of the pulsed output and to provide the clock signal responsive to the detected frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.