Control for dual stepper motors
US7294052B2 · kind B2 · utility
1Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2004 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Nov 15, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2013/1433
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
In an air handling unit for discharging a flow of air into the surrounding ambient, having a series of horizontal louvers and a series of vertical louvers mounted in the discharge flow. A first multi-phase stepper motor is arranged to step the horizontal louvers to deflect the air flow in a vertical direction and a second multi-phase stepper motor is arranged to step vertical louvers to deflect the flow in a transverse direction. A controller is programmed to alternately apply power from a single power source to each of the motors during each phase to step each motor in equal increments during each phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.