FR2415906A2 - High-speed DC motor or generator - has pole pieces on permanent magnets on internal frame to reduce demagnetising field - Google Patents

High-speed DC motor or generator - has pole pieces on permanent magnets on internal frame to reduce demagnetising field

Info

Publication number
FR2415906A2
FR2415906A2 FR7802474A FR7802474A FR2415906A2 FR 2415906 A2 FR2415906 A2 FR 2415906A2 FR 7802474 A FR7802474 A FR 7802474A FR 7802474 A FR7802474 A FR 7802474A FR 2415906 A2 FR2415906 A2 FR 2415906A2
Authority
FR
France
Prior art keywords
pole pieces
permanent magnets
generator
motor
speed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7802474A
Other languages
French (fr)
Other versions
FR2415906B2 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RECUPELEC
Original Assignee
RECUPELEC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RECUPELEC filed Critical RECUPELEC
Priority to FR7802474A priority Critical patent/FR2415906A2/en
Publication of FR2415906A2 publication Critical patent/FR2415906A2/en
Application granted granted Critical
Publication of FR2415906B2 publication Critical patent/FR2415906B2/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
    • H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
    • H02K23/04—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting having permanent magnet excitation

Abstract

In the dc motor or generator demagnetising field in its inductive magnetics is reduced by interposing soft-iron pole pieces between the surface of the permanent magnets and the inducing parts. The thickness of the pole pieces is chosen to allow the flux to vary sufficiently without saturating the iron. The permanent magnets are fixed to the external face of an internal cylindrical soft-iron frame. The pole pieces are thicker at their centres than their sides thereby producing a variable-width gap with the external frame.
FR7802474A 1978-01-30 1978-01-30 High-speed DC motor or generator - has pole pieces on permanent magnets on internal frame to reduce demagnetising field Granted FR2415906A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7802474A FR2415906A2 (en) 1978-01-30 1978-01-30 High-speed DC motor or generator - has pole pieces on permanent magnets on internal frame to reduce demagnetising field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7802474A FR2415906A2 (en) 1978-01-30 1978-01-30 High-speed DC motor or generator - has pole pieces on permanent magnets on internal frame to reduce demagnetising field

Publications (2)

Publication Number Publication Date
FR2415906A2 true FR2415906A2 (en) 1979-08-24
FR2415906B2 FR2415906B2 (en) 1981-09-25

Family

ID=9203946

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7802474A Granted FR2415906A2 (en) 1978-01-30 1978-01-30 High-speed DC motor or generator - has pole pieces on permanent magnets on internal frame to reduce demagnetising field

Country Status (1)

Country Link
FR (1) FR2415906A2 (en)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR487151A (en) * 1917-10-13 1918-06-12 Romain Boin DC electric dynamo machine
DE700929C (en) * 1937-08-28 1941-01-04 Aeg Electric machine
US2493102A (en) * 1946-12-26 1950-01-03 Keefe And Merritt Company O Rotor for electric machines and method of making the same
CH345064A (en) * 1956-12-03 1960-03-15 Oerlikon Maschf Arrangement for fastening pole pieces to pole cores of electrical machines
FR1275465A (en) * 1960-09-28 1961-11-10 Electricite De France Improvements to magnetic circuits with permanent magnets, in particular to inductors of electric machines
FR1427616A (en) * 1963-01-22 1966-02-11 Gen Precision Inc Torque generator system, direct current and permanent magnet
FR1452982A (en) * 1965-10-11 1966-04-15 Bosch Gmbh Robert Magnetic circuit, in particular for small electrical machines, and machines provided with said circuit
DE1488711A1 (en) * 1965-09-29 1969-05-22 Siemens Ag Small electric motor with a permanent magnet runner
FR2245112A1 (en) * 1973-09-22 1975-04-18 Bosch Gmbh Robert Small motor with slot frequency noise reduction - is by uneven gaps between curved stator magnets and wound rotor and housing
DE2550640A1 (en) * 1975-11-11 1977-05-12 Interelectric Ag STATOR FOR ELECTRIC MACHINERY
DE2605539A1 (en) * 1976-02-10 1977-08-11 Siemens Ag Mounting of pole pillars in rotating electrical machines - with expansion bolt welded to pole pieces heated before nut is added to provide positive retention

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR487151A (en) * 1917-10-13 1918-06-12 Romain Boin DC electric dynamo machine
DE700929C (en) * 1937-08-28 1941-01-04 Aeg Electric machine
US2493102A (en) * 1946-12-26 1950-01-03 Keefe And Merritt Company O Rotor for electric machines and method of making the same
CH345064A (en) * 1956-12-03 1960-03-15 Oerlikon Maschf Arrangement for fastening pole pieces to pole cores of electrical machines
FR1275465A (en) * 1960-09-28 1961-11-10 Electricite De France Improvements to magnetic circuits with permanent magnets, in particular to inductors of electric machines
FR1427616A (en) * 1963-01-22 1966-02-11 Gen Precision Inc Torque generator system, direct current and permanent magnet
DE1488711A1 (en) * 1965-09-29 1969-05-22 Siemens Ag Small electric motor with a permanent magnet runner
FR1452982A (en) * 1965-10-11 1966-04-15 Bosch Gmbh Robert Magnetic circuit, in particular for small electrical machines, and machines provided with said circuit
FR2245112A1 (en) * 1973-09-22 1975-04-18 Bosch Gmbh Robert Small motor with slot frequency noise reduction - is by uneven gaps between curved stator magnets and wound rotor and housing
DE2550640A1 (en) * 1975-11-11 1977-05-12 Interelectric Ag STATOR FOR ELECTRIC MACHINERY
DE2605539A1 (en) * 1976-02-10 1977-08-11 Siemens Ag Mounting of pole pillars in rotating electrical machines - with expansion bolt welded to pole pieces heated before nut is added to provide positive retention

Also Published As

Publication number Publication date
FR2415906B2 (en) 1981-09-25

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