System and method for controlling current provided to a stepping motor
US7338260B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2004 |
| Grant date | Mar 4, 2008 |
| Priority date | — |
| Expiry date | Sep 1, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/41326
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method is disclosed for controlling the input electrical current to an infusion pump stepper motor based on predetermined torque requirements. The system can include a motor controller and a non-volatile memory containing expected load torque values throughout a pump cycle. Responsive to the expected load torque values, the motor controller provides the stepper motor with a varying electrical current for overcoming load torque at each point in the pumping cycle. Additional factors can also be considered for varying the electrical current. These factors include, but are not limited to, temperature, pressure, and elapsed operating time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.