Magnetic bearing drive circuit
US9470264B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2011 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | Jul 29, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2300/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
There is provided a magnetic bearing drive circuit driven from a pair of Direct Current (DC) link voltage rails, said magnetic bearing drive circuit having at least one amplifier providing an output PWM drive signal for driving a magnetic bearing winding, said output PWM drive signal being provided to the magnetic bearing winding through a plurality of drive signal rails, said magnetic bearing drive circuit comprising a pair of voltage offset devices coupled to the DC link voltage rails and arranged to provide a pair of offset catcher voltage rails from the DC link voltage rails, and primary clamping means coupled between each offset catcher voltage rail and a respective one of the drive signal rails.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.