DC brushless motor drive circuit having input signal compatability to hall effect ICs and hall sensors
US6020700A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Jul 16, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P6/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor drive circuit includes an amplifying and comparing circuit, a multiplexer, an input control circuit and a drive pulse generator. The amplifying and comparing circuit receives an output signal from a Hall element and generates an amplified output signal. The input control circuit detects whether the Hall element is a Hall sensor or a Hall IC for controlling the multiplexer to have its output from either the Hall IC or the amplifying and comparing circuit. The drive pulse generator has an input connected to the output of the multiplexer, and has four outputs connected to four MOS transistors respectively for generating clock signals to drive the four MOS transistors to provide driving current to the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.