Pump and motor assembly with constant pressure output
US6494685B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Mar 29, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2203/0207
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Disclosure is made of a method for electronic polar attenuation of torque profile for positive displacement pumps by a processor where the attenuated torque profile is compared with the shaft displacement angle of the pump input shaft. The processor then signals a motor to power a pump with the result of pumping at a constant pressure at the full range of the designed system flow volume. In addition to the attenuated torque profile, the processor can also account for the response time of the pump drive, the motor inductive reactance, system inertia, application characteristics of the pump, and regenerative energy during deceleration of the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.