Multi-shaft driving apparatus and fluid rotary apparatus
US5329216A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Jun 1, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C2240/402
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-shaft driving apparatus includes a plurality of motors each for rotating one of a plurality of shafts to be synchronously rotated, an encoder, provided for each motor, for detecting a rotational state of the shafts, a pulse generator for generating a pulse signal for rotating the shafts, and a motor control circuit, provided for each motor, for inputting the pulse signal generated by the pulse generator for rotating the shafts and a pulse signal detected by the encoder and used as a feedback signal. The motor control circuit has a PLL control section and a rotational angle phasing section so that a rotational angle phasing control loop is generated to perform a rotational angle phasing operation by the rotational angle phasing section so to as place the shafts in position at a driving start and after performing the rotational angle phasing operation, a rising and steady control loop is generated to perform an operation from a rise state to a steady state by the PLL control section. A fluid rotary apparatus includes a plurality of rotors accommodated in a housing, a plurality of shafts each for rotating one of the rotors to be synchronously rotated, and a fluid drawing openi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.