Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor
Patent
1988-03-28
1989-06-27
Dobeck, Benjamin
Electricity: motive power systems
Positional servo systems
Pulse-width modulated power input to motor
318606, 318636, 318254, 388901, 388910, 388911, 388915, 388811, H02P 516
Patent
active
048432881
ABSTRACT:
A motor control system and related method are provided for phase and frequency locked operation of multiple spindle motors in a computer disk drive environment or the like, for coupling two or more disk drive units together to provide expanded data storage capability. The control system comprises a hybrid digital and analog network for producing a pulse width modulated control signal to control a disk drive spindle motor in a manner achieving frequency and phase locked relation with a reference signal. Multiple spindle motors are similarly driven in relation with the same reference signal, whereby the spindle motors are frequency and phase locked with respect to each other to permit, for example, parallel data transfer among the multiple disk drive units.
REFERENCES:
patent: 3355649 (1967-11-01), Boylan et al.
patent: 3418304 (1983-11-01), Iwai
patent: 3883785 (1975-05-01), Fulcher et al.
patent: 4109184 (1978-08-01), Weber
patent: 4193020 (1980-03-01), Song
patent: 4734630 (1988-03-01), Okano
patent: 4739230 (1988-04-01), Sonobe et al.
Vigil Daniel R.
Volz Le Roy A.
Dobeck Benjamin
Rigidyne Corporation
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