DE3225421A1 - External rotor DC motor without a commutator - Google Patents

External rotor DC motor without a commutator

Info

Publication number
DE3225421A1
DE3225421A1 DE19823225421 DE3225421A DE3225421A1 DE 3225421 A1 DE3225421 A1 DE 3225421A1 DE 19823225421 DE19823225421 DE 19823225421 DE 3225421 A DE3225421 A DE 3225421A DE 3225421 A1 DE3225421 A1 DE 3225421A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
rotor
stator
slots
winding
auxiliary
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.)
Withdrawn
Application number
DE19823225421
Other languages
German (de)
Inventor
Rolf Dr Ing Mueller
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.)
ebm-papst St Georgen GmbH and Co KG
Original Assignee
ebm-papst St Georgen GmbH and Co KG
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

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K29/00Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/14Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with speed sensing devices

Abstract

An external rotor DC motor without a commutator, having a cylindrical air gap, especially for driving disk memories and similar apparatuses, having a permanent-magnet rotor with at least two poles, and having an annular stator. The stator is provided with three main slots per rotor pole pair into which slots coils which are fractionally pitched through 120 DEG electrical are inserted without any overlap in order to form a three-phase stator winding. Current can be applied to these coils in a cyclic sequence, as a function of the rotor position, by means of an electronic commutating device. In the sides of the heads facing the air gap of at least some of the stator poles auxiliary slots are constructed which are small in comparison with the main slots, into which a tachogenerator auxiliary winding is inserted in order to couple out a harmonic of the induced voltage. The auxiliary winding coils are wound and arranged such that the effect of the main flux on the auxiliary winding is essentially suppressed. <IMAGE>
DE19823225421 1982-07-07 1982-07-07 External rotor DC motor without a commutator Withdrawn DE3225421A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19823225421 DE3225421A1 (en) 1982-07-07 1982-07-07 External rotor DC motor without a commutator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823225421 DE3225421A1 (en) 1982-07-07 1982-07-07 External rotor DC motor without a commutator

Publications (1)

Publication Number Publication Date
DE3225421A1 true true DE3225421A1 (en) 1984-01-12

Family

ID=6167869

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19823225421 Withdrawn DE3225421A1 (en) 1982-07-07 1982-07-07 External rotor DC motor without a commutator

Country Status (1)

Country Link
DE (1) DE3225421A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592728A3 (en) * 2011-11-09 2017-02-22 Hamilton Sundstrand Corporation Electromagnetic device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639055B2 (en) * 1975-09-04 1980-06-19 Pioneer Electronic Corp., Tokio
DE2901676A1 (en) * 1979-01-17 1980-08-14 Papst Motoren Kg Brushless DC motor
DE3122049A1 (en) * 1980-06-06 1982-07-15 Papst Motoren Kg DC external-rotor motor having no commutator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2639055B2 (en) * 1975-09-04 1980-06-19 Pioneer Electronic Corp., Tokio
DE2901676A1 (en) * 1979-01-17 1980-08-14 Papst Motoren Kg Brushless DC motor
DE3122049A1 (en) * 1980-06-06 1982-07-15 Papst Motoren Kg DC external-rotor motor having no commutator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2592728A3 (en) * 2011-11-09 2017-02-22 Hamilton Sundstrand Corporation Electromagnetic device

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Legal Events

Date Code Title Description
8110 Request for examination paragraph 44
8130 Withdrawal