Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1993-06-01
1994-07-12
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
318625, 318101, 417 5, H02P 156, F04B 4106
Patent
active
053292162
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 opening formed in the housing and a fluid discharge opening formed therein, in addition to the structure of the multi-shaft driving apparatus so that the volume change of a space formed by the rotors or by the rotors and the housing is utilized to draw and discharge fluid.
REFERENCES:
patent: 4048657 (1977-09-01), Knuth
patent: 4625156 (1986-11-01), Komiya et al.
patent: 4829217 (1989-05-01), Kameyama et al.
patent: 5037252 (1991-08-01), Hasegawa et al.
patent: 5115172 (1992-05-01), Ishii et al.
Hasegawa Mikio
Maruyama Teruo
Matsushita Electric - Industrial Co., Ltd.
Ro Bentsu
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