NL7502709A - Permanent magnet rotor stepping motor - has soft iron extensions to poles to improve starting torque and reduce losses - Google Patents

Permanent magnet rotor stepping motor - has soft iron extensions to poles to improve starting torque and reduce losses

Info

Publication number
NL7502709A
NL7502709A NL7502709A NL7502709A NL7502709A NL 7502709 A NL7502709 A NL 7502709A NL 7502709 A NL7502709 A NL 7502709A NL 7502709 A NL7502709 A NL 7502709A NL 7502709 A NL7502709 A NL 7502709A
Authority
NL
Netherlands
Prior art keywords
rotor
poles
stepping motor
stator
soft iron
Prior art date
Application number
NL7502709A
Other versions
NL160125B (en
NL160125C (en
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
Priority claimed from NL6815283A external-priority patent/NL146660B/en
Application filed filed Critical
Publication of NL7502709A publication Critical patent/NL7502709A/en
Publication of NL160125B publication Critical patent/NL160125B/en
Application granted granted Critical
Publication of NL160125C publication Critical patent/NL160125C/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/10—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type
    • H02K37/12—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets
    • H02K37/14—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors of permanent magnet type with stationary armatures and rotating magnets with magnets rotating within the armatures

Abstract

A single phase stepping motor having a rotor with uniformly distributed permanent magnetic poles (7) uniformly distributed around the circumference showing alternating polarity, revolving within a wound stator with the same number of poles as the rotor, each stator pole having a main part (11) and an extension projecting away from the direction of the rotor in known fashion. On each rotor pole a thin plate of soft iron (14) is attached of such thickness that it is saturated by a fraction of the stator flux. The plates may extend along the axial length of the rotor (4) and have a width equal to or less than the width of the main parts of the stator poles. The effect is to increase starting torque and to reduce losses without reducing the holding torque.
NL7502709.A 1967-10-28 1975-03-07 STEPPER MOTOR WITH A PERMANENT MAGNETIC ROTOR. NL160125C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEV0034723 1967-10-28
NL6815283A NL146660B (en) 1967-10-28 1968-10-25 SINGLE-PHASE STEPPER MOTOR.

Publications (3)

Publication Number Publication Date
NL7502709A true NL7502709A (en) 1975-07-31
NL160125B NL160125B (en) 1979-04-17
NL160125C NL160125C (en) 1979-09-17

Family

ID=26002074

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7502709.A NL160125C (en) 1967-10-28 1975-03-07 STEPPER MOTOR WITH A PERMANENT MAGNETIC ROTOR.

Country Status (1)

Country Link
NL (1) NL160125C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042606A1 (en) * 1997-03-20 1998-10-01 Barmag Ag Method for controlling a crosswinding device
CN111323055A (en) * 2018-12-14 2020-06-23 丰田自动车株式会社 Resolver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998042606A1 (en) * 1997-03-20 1998-10-01 Barmag Ag Method for controlling a crosswinding device
US6008613A (en) * 1997-03-20 1999-12-28 Barmag Ag Method for controlling a crosswinding device
CN111323055A (en) * 2018-12-14 2020-06-23 丰田自动车株式会社 Resolver

Also Published As

Publication number Publication date
NL160125B (en) 1979-04-17
NL160125C (en) 1979-09-17

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Legal Events

Date Code Title Description
VJC Lapsed due to non-payment of the due maintenance fee for the patent or patent application
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: VDO ADOLF