Motor control device
US9362857B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2013 |
| Grant date | Jun 7, 2016 |
| Priority date | — |
| Expiry date | Jun 20, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P27/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor control device includes an H-bridge circuit for controlling on/off of a current fed to a motor, a drive circuit for driving the H-bridge circuit, a drive command signal generator for generating a drive command signal including a pulse signal having a predetermined drive frequency for sending a command to drive the motor, a current detection circuit that includes a current detection resistor and a comparator connected in series with the motor and outputs a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal, a latch circuit for holding a current detection result based on an ON signal of the drive command signal and the comparison output signal, and a gate circuit for driving the drive circuit based on the ON signal of the drive command signal and a latch output signal from the latch circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.