Magnetically levitated pump apparatus
US6589030B2 · kind B2 · utility
95Cited by
13References
17Claims
0Family size
Assignees
Inventor
Key dates
| Filing date | Jun 19, 2001 |
| Grant date | Jul 8, 2003 |
| Priority date | — |
| Expiry date | Jan 15, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2360/44
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A power supply feeds a dc voltage to an operational amplifier at an inverting input while a motor current command value is input to the operational amplifier at a non-inverting input and when a dc voltage being supplied to a power amplifier varies the operational amplifier responds to the voltage variation by adjusting the motor current command value to alter a control signal applied to a motor control circuit and thus reduce revolution-rate variation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.