Electrical circuit for a centrifuge

Details Electrical circuit for a centrifuge Electrical circuit for a centrifuge

1991-05-06

1992-02-04

Ro, Bentsu

Electricity: motive power systems

Induction motor systems

Primary circuit control

318811, 318757, H02P 324, H02P 763

Patent

active

050862650

ABSTRACT:
To control the speed of an alternating-current drive capacitor motor of a centrifuge, the motor is connected to the bridge arm of a single-phase inverter. The bridge arm is connected at each of its ends to the midpoints of a series circuit of two capacitors and two field-effect transistors, these series circuits being connected in parallel with one another and connected to the output of a rectifier operated by the a.c. voltage supply. During operation, the capacitors are discharged by means of triggering the field-effect transistors alternately via the capacitor motor, the triggering being performed via a microprocessor serving as a pulse generator.

REFERENCES:
patent: 3740629 (1973-06-01), Kohlhagen
patent: 3818310 (1974-06-01), Smith
patent: 4733146 (1988-03-01), Hamby
patent: 4734627 (1988-03-01), Koerner
patent: 4972134 (1990-11-01), Getz et al.
patent: 4990839 (1991-02-01), Schonlau
patent: 4993104 (1991-02-01), Kasper et al.
patent: 5005115 (1991-04-01), Schauder
"Die neue Generation universell Einsetzbarer Kuhlzentrifugen", Heraeus Christ.
"Leistungselektronik", Rudolf Lappe et al., Springer-Verlag, 1988, pp. 266-281.

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