Hybrid stepping motor unit
US4126818A · kind A · utility
Inventor
Key dates
| Filing date | Jun 16, 1977 |
| Grant date | Nov 21, 1978 |
| Priority date | — |
| Expiry date | Jun 16, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B19/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hybrid stepping motor unit includes a stepper-type primary motor and a secondary motor. The rotor shafts of the stepper-type primary motor and the secondary motor are connected to a common output shaft. The stepper-type primary motor is energized in response to an electrical command signal from an external source, such as a computer. When the stepper-type primary motor is energized, the stepper-type primary motor produces torque and attempts to drive the load combination of the interconnected rotor shafts, the common output shaft, and any mechanical load on the common output shaft, such as a machine tool component. This produces a reaction torque on the stepper-type primary motor. A transducer converts the reaction torque into an electrical control signal. The secondary motor is energized in response to the electrical control signal from the transducer. When the secondary motor is energized, the secondary motor produces torque which augments the torque of the stepper-type primary motor to drive the load circulation. After the rotor shaft of the stepper-type primary motor rotates a predetermined angular distance, a reaction torque on the stepper-type primary motor is no longer pro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.