Speed-limited electrically compensated constant speed drive

Details Speed-limited electrically compensated constant speed drive Speed-limited electrically compensated constant speed drive

1987-12-28

1989-06-20

Shoop, Jr., William M.

Electricity: motive power systems

With particular motor-driven load device

Power- or motion-transmitting mechanism

318 11, 318111, 322 40, 290 4C, H02P 900

Patent

active

048412023

ABSTRACT:
An electrically compensated constant speed drive which is speed limited so that power flow through the speed compensation link is unidirectional includes a permanent magnet generator which is interconnected with a permanent magnet motor by a power converter. The permanent magnet generator and the permanent magnet motor are controlled by first and second independent control loops. The power converter includes an AC/DC converter coupled to electrical power windings of the permanent magnet generator, a filter coupled to the output of the AC/DC converter and an inverter coupled between the filter and electrical power windings of the permanent magnet motor. The permanent magnet generator, AC/DC converter, filter and the first control loop together develop a voltage on a DC bus. The voltage on the DC bus, which is coupled to the inverter, is sufficient to operate the permanent magnet motor with the required speed and torque, and thus the second control loop need not implement a voltage control scheme, such as a PMW control.

REFERENCES:
patent: 4572961 (1986-02-01), Borger
patent: 4661762 (1987-04-01), Baker
patent: 4692671 (1987-09-01), Dishner et al.
patent: 4695776 (1987-09-01), Dishner et al.
patent: 4734626 (1988-03-01), Sutrina et al.
patent: 4743812 (1988-05-01), Dishner
J. J. Cathey, "Electrically Compensated Aircraft Alternator Drive", 1983.
Chetty, Subiah, Dhyanchand and Fair, "Design of 25 KW (peak) 3-Phase Full-Wave SCR Bridge Regulator", 1983.

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