Abstract 1,042,225. Electric motors. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. Sept. 16, 1964 [Sept. 19, 1963], No. 37832/64. Heading H2A. In a 1 Ph. A.C., e.g. H.F. motor, including a stator 15 having a pair of alternating field poles W1, W2 and two pairs of unidirectional field poles N1, S1, N2, S2, and a rotor 23 having a plurality of conductor set circuits each shortcircuited by a respective rectifier, e.g. semiconductor diode 9, Fig. 16 (not shown), each pair of opposite polarity unidirectional field poles N1, S1 &c. is arranged between successive alternating field poles W1 &c., and the stator also includes a pair of unmagnetized poles L1, L2 whose magnetic circuit is closed via the rotor and each of which is arranged between the opposite poles of the two pairs of unidirectional poles, whilst the number of conductor set circuits equals that of the stator poles and each has a coil span substantially equal to twice the stator pole pitch. The motor operates by the alternating field poles inducing in the rotor circuit conductors 1 currents which are polarized by the rectifiers 9. The stator and/or rotor may be of ferrite, the unidirectional field poles N1 &c. energized by either D.C. windings 19 or permanent magnets, and in a railway application starting is controlled by tappings on the alternating field pole windings 17. The stator may be sealed from the rotor and encapsulated in an oil-filled closed shell.
Inventors
👤 Gossel Dieter
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-27 19:41
CPC Classifications
H; H02; H02K; H02K29/00; H02K99/00; H02K99/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A SINGLE PHASE A.C. MOTOR COMPRISING A STATOR HAVING AT LEAST TWO SPACED ALTERNATING FIELD POLES, WINDING MEANS FOR PRODUCING AN ALTERNATING MAGNETIC FIELD IN SAID POLES, SAID STATOR FURTHER COMPRISING TWO PAIRS OF DIRECT CURRENT FIELD POLES FOR EACH PAIR OF ALTERNATING FIELD POLES, A ROTOR IN OPERATIVE RELATION TO SAID FIELD POLES COMPRISING A PLURALITY OF WINDINGS EACH OF WHICH COMPRISES FIRST AND SECOND ACTIVE CONDUCTORS INTERCONNECTED WITH A RECTIFIER ELEMENT TO FORM A CLOSED CIRCUIT IN WHICH A VARYING UNIDIRECTIONAL CURRENT IS INDUCED BY SAID ALTERNATING FIELD, SAID D.C. FIELD POLES BEING ARRANGED ABOUT SAID STATOR IN PAIRS OF OPPOSITE POLARITY BETWEEN ADJACENT ONES OF SAID ALTERNATING FIELD POLES, AND MAGNETIC MEANS ARRANGED BETWEEN THE POLES OF EACH PAIR OF D.C. FIELD POLES TO PROVIDE A PLURALITY OF MAGNETICALLY FLOATING POLES, EACH OF SAID FLOATING POLES BEING ARRANGED TO COOPERATE WITH SAID ROTOR TO PROVIDE A SUBSTANTIALLY CLOSED MAGNETIC PATH, THE SPACING BETWEEN SAID FIRST AND SECOND ACTIVE CONDUCTORS OF EACH OF SAID ROTOR WINDINGS BEING APPROXIMATELY TWICE THE POLE PITCH.
Claim 2
Dependent Claim
174 words
A SINGLE PHASE A.C. MOTOR COMPRISING A STATOR HAVING AT LEAST TWO SPACED ALTERNATING FIELD POLES, WINDING MEANS FOR PRODUCING AN ALTERNATING MAGNETIC FIELD IN SAID POLES, SAID STATOR FURTHER COMPRISING TWO PAIRS OF DIRECT CURRENT FIELD POLES FOR EACH PAIR OF ALTERNATING FIELD POLES, A ROTOR IN OPERATIVE RELATION TO SAID FIELD POLES COMPRISING A PLURALITY OF WINDINGS EACH OF WHICH COMPRISES FIRST AND SECOND ACTIVE CONDUCTORS INTERCONNECTED WITH A RECTIFIER ELEMENT TO FORM A CLOSED CIRCUIT IN WHICH A VARYING UNIDIRECTIONAL CURRENT IS INDUCED BY SAID ALTERNATING FIELD, SAID D.C. FIELD POLES BEING ARRANGED ABOUT SAID STATOR IN PAIRS OF OPPOSITE POLARITY BETWEEN ADJACENT ONES OF SAID ALTERNATING FIELD POLES, AND MAGNETIC MEANS ARRANGED BETWEEN THE POLES OF EACH PAIR OF D.C. FIELD POLES TO PROVIDE A PLURALITY OF MAGNETICALLY FLOATING POLES, EACH OF SAID FLOATING POLES BEING ARRANGED TO COOPERATE WITH SAID ROTOR TO PROVIDE A SUBSTANTIALLY CLOSED MAGNETIC PATH, THE SPACING BETWEEN SAID FIRST AND SECOND ACTIVE CONDUCTORS OF EACH OF SAID ROTOR WINDINGS BEING APPROXIMATELY TWICE THE POLE PITCH.