Electricity: motive power systems – Positional servo systems – Frequency- or phase-modulated systems
Patent
1996-12-19
1999-06-22
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
Frequency- or phase-modulated systems
318608, 318721, 318723, H02P 700, G05B 102
Patent
active
059145781
ABSTRACT:
An electrical drive control system includes a controlled drive, an auxiliary generator, a control unit, and a power unit. The rotors of the controlled drive and of the auxiliary generator are connected so that rotation of controlled drive causes a corresponding rotation of the auxiliary generator. The control unit receives a first reference signal having a first frequency. The auxiliary generator receives a second reference signal having a second frequency. The control unit may generate the second reference signal. In response to the second reference signal, the auxiliary generator generates a primary information signal having a phase shift that is indicative of the rotational position of a rotor of the auxiliary generator and the controlled drive. The control unit receives a user selected position command indicative of a selected position of the rotor. In response to the difference between the selected and determined positions of the rotor, the control unit generates control signals for controlling the power unit to adjust the drive signal to the controlled drive.
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patent: 4479078 (1984-10-01), Kidd et al.
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patent: 5329195 (1994-07-01), Horber et al.
patent: 5469032 (1995-11-01), Otake
patent: 5532559 (1996-07-01), Yoo
Werner Leonhard, "Control of Electrical Drives", 2nd ed., Springer (1966), pp. 75-77 and pp. 155-177.
J.R. Hendershot Jr., T. Miller, "Design of Brushless Permanent-Magnet Motors", Magna Physics Publishing (1994), pp. 1-1 through 1-12.
T. Kenjo, "Electrical Motors and their Controls", Oxford University Press (1994), pp. 87-96.
T. Kenjo, "Power Electronics for the Microprocessor Age", Oxford University Press (1994), pp. 170-199.
Costello Leo F.
Ro Bentsu
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