(19)
(11) EP 0 636 419 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
14.06.1995 Bulletin 1995/24

(43) Date of publication A2:
01.02.1995 Bulletin 1995/05

(21) Application number: 93202354.2

(22) Date of filing: 10.08.1993
(51) International Patent Classification (IPC)6B04B 1/20
(84) Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE

(30) Priority: 28.07.1993 IT MI931691

(71) Applicant: NUOVA M.A.I.P., MACCHINE AGRICOLE INDUSTRIALI PIERALISI S.P.A.
Jesi (Ancona) (IT)

(72) Inventor:
  • Pieralisi, Gennaro
    Jesi (Ancona) (IT)

(74) Representative: Raimondi, Alfredo, Dott. Ing. Prof. et al
Dott. Ing. Prof. RAIMONDI ALFREDO S.r.l. Piazzale Cadorna 15
20123 Milano
20123 Milano (IT)


(56) References cited: : 
   
       


    (54) Device for controlling and regulating the relative speed between rotary components interacting with one another respectively connected to the rotor and stator of an electric motor


    (57) A device for controlling and regulating the relative speed between the scroll (4) and drum (2) of a centrifugal extractor, comprising a dc or ac electric motor (10), stator (10a) of which is made integral with drum (2) and rotor (10b) of which is made integral with a gear (7) which drives scroll (4) via appropriate means (7a, 8a, 14a; 7b, 8b, 14b) of connection, there being furthermore provided means (30a, 30b) for detecting the speeds of rotation of such rotor (10b) and stator (10a) and for converting them into a representative electric signal, and means (40, 50) for comparing such electric signals designed to emit a signal (Drs) capable of operating means (60; 1060) for supplying to rotor (10b) a current capable of compensating for any deviations of the parameters of the extractor from the programmed operating conditions.







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