Method for controlling the motor of a pump involving the determination and synchronization of the point of maximum torque with a table of values used to efficiently drive the motor
US6979181B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2002 |
| Grant date | Dec 27, 2005 |
| Priority date | — |
| Expiry date | Nov 27, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2203/0207
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling a motor (11) driving a pump (10) using a microcomputer (14) includes repeatedly sampling a parameter representative of motor torque over one cycle of operation of the pump (10), determining at least one point of maximum motor torque during said one cycle of operation of the pump (FIG. 4); applying speed commands to the motor (11) from a table of stored speed values in memory (19), said values being selected to provide relatively greater speed commands at points of lower motor torque and relatively lesser speed commands at points of higher pump pressure corresponding to higher motor torque, while maintaining at least a base speed command to prevent stalling; and synchronizing the first value in the table of stored values to the point of maximum motor torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.