Variable frequency centrifuge control

Details Variable frequency centrifuge control Variable frequency centrifuge control

1990-12-20

1993-04-20

Coe, Philip R.

Imperforate bowl: centrifugal separators

With condition responsive means

For controlling drive of driven means within bowl

494 53, 494 84, 318 68, 318376, B04B 910

Patent

active

052037622

ABSTRACT:
A decanter centrifuge includes a control system for receiving input AC power and outputting a variable voltage and frequency for controlling the speed of the backdrive and the main drive motor. The control system includes a first controller for converting AC power into DC power and then converting the DC power to AC power at a variable voltage and frequency to the main drive motor. A second controller is connected to the first conversion unit through a common DC bus. The second controller converts DC power to AC power and supplies AC power at a variable frequency to the backdrive motor. The braking force created by the backdrive motor during operation of the decanter centrifuge creates electricity which is passed through the second controller and through the common DC bus to the first controller. Thus, the generated power from the backdrive motor is converted into power for use by the main drive motor. A regeneration package may also be provided in order to supply the generated power from the backdrive to the AC input line during decelerating the conveyor when the bowl is simultaneously being decelerated and the main drive motor is also generating power.

REFERENCES:
patent: 2867378 (1959-01-01), Harlow
patent: 3333177 (1967-07-01), Sutton
patent: 3439242 (1969-04-01), Gasser
patent: 3440507 (1969-04-01), Derrick et al.
patent: 3753071 (1973-08-01), Engel et al.
patent: 3857070 (1974-12-01), Smith
patent: 4009431 (1977-02-01), Johnson
patent: 4024451 (1977-05-01), Nishino et al.
patent: 4070290 (1978-01-01), Crosby
patent: 4080553 (1978-03-01), Lyman
patent: 4099107 (1978-07-01), Eder
patent: 4129249 (1978-12-01), Todd
patent: 4141488 (1979-02-01), Gense
patent: 4292531 (1981-09-01), Williamson
patent: 4298162 (1981-11-01), Hohne
patent: 4303192 (1981-12-01), Katsume
patent: 4315305 (1982-02-01), Siemon
patent: 4327862 (1982-05-01), Jakobs
patent: 4334647 (1982-06-01), Taylor
patent: 4369915 (1983-01-01), Oberg et al.
patent: 4400767 (1983-08-01), Fenter
patent: 4411646 (1983-10-01), Cyphelly
patent: 4474309 (1984-10-01), Solomon
patent: 4521840 (1985-06-01), Hoadley
patent: 4620296 (1986-10-01), Siemon
patent: 4642745 (1987-02-01), Steigerwald et al.
patent: 4697136 (1987-09-01), Ishikawa
patent: 4704879 (1987-11-01), Christ et al.
patent: 4720776 (1988-01-01), Guyeska
patent: 4751398 (1988-06-01), Ertz, III
patent: 4751629 (1988-06-01), Shimizu et al.
patent: 4805134 (1989-02-01), Recker et al.
patent: 4807102 (1989-02-01), Serras-Paulet
patent: 4849950 (1989-07-01), Sugiura et al.
patent: 4876460 (1989-10-01), Johnson
patent: 4884182 (1989-11-01), Ando et al.
patent: 4978331 (1990-12-01), Luchetta
patent: 5073848 (1991-12-01), Steigerwald
Communication and European Search Report for EP application No. 91311849.3.

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