Motor control device
US9239027B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 21, 2013 |
| Grant date | Jan 19, 2016 |
| Priority date | — |
| Expiry date | Jul 23, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device includes a drive circuit to drive an H-bridge circuit to control a current fed to a motor, a drive command signal generator to generate a drive command signal including a pulse signal having predetermined drive frequency and duty for sending a command to drive the motor, a current detection circuit operable to output a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal, a latch circuit to hold a current detection result based on an ON signal of the drive command signal and the comparison output signal, a gate circuit to drive the drive circuit based on the ON signal of the drive command signal and a latch output signal from the latch circuit, and a control unit that changes the duty of the drive command signal based on the current detection result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.