EP4342060A1 - Moteur électrique avec carter de stator et capot de ventilateur - Google Patents

Moteur électrique avec carter de stator et capot de ventilateur

Info

Publication number
EP4342060A1
EP4342060A1 EP22725167.5A EP22725167A EP4342060A1 EP 4342060 A1 EP4342060 A1 EP 4342060A1 EP 22725167 A EP22725167 A EP 22725167A EP 4342060 A1 EP4342060 A1 EP 4342060A1
Authority
EP
European Patent Office
Prior art keywords
electric motor
fan
motor according
sensor
area
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.)
Pending
Application number
EP22725167.5A
Other languages
German (de)
English (en)
Inventor
Li Jinchang
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.)
SEW Eurodrive GmbH and Co KG
Original Assignee
SEW Eurodrive 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
Priority claimed from CN202110547015.XA external-priority patent/CN115378198A/zh
Application filed by SEW Eurodrive GmbH and Co KG filed Critical SEW Eurodrive GmbH and Co KG
Publication of EP4342060A1 publication Critical patent/EP4342060A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Definitions

  • the invention relates to an electric motor with a stator housing and a fan hood.
  • an electric motor is designed with a stator housing and a fan cover.
  • the invention is therefore based on the object of further developing an electric motor with a stator housing and a fan hood, in which case it should be possible to measure the speed in a cost-effective manner.
  • the object is achieved with the electric motor according to the features specified in claim 1.
  • a metallic encoder is connected to the rotor shaft in a torque-proof manner, in particular on the side of the fan cover facing away from the stator housing, with a retaining part being attached to the fan cover on the side facing away from the stator housing, in which accommodates a sensor, in particular a sensor for detecting the encoder, with a rotor shaft of the electric motor, which is rotatably mounted relative to the stator housing, protruding through the fan hood.
  • the advantage here is that a cost-effective speed detection is executable.
  • the encoder can be designed as a simple stamped part made from sheet metal and the sensor can be designed as an inductive proximity switch.
  • a sensor signal corresponding to the number of blades can be generated by the sensor per revolution, from which the speed can be determined in a simple and cost-effective manner.
  • an improved angular resolution that increases with the number of blades can also be achieved when detecting the angular position of the rotor shaft.
  • a fan wheel is connected to the rotor shaft in a rotationally fixed manner, with the fan cover being arranged between the fan wheel and the encoder.
  • the fan hood surrounds the fan wheel.
  • the advantage here is that the fan wheel is surrounded radially by the fan cover and is therefore protected.
  • the encoder has wings, in particular in a respective circumferential angular range in the radial direction of the rotor shaft and/or projecting wings, in particular two wings.
  • the advantage here is that the wings can be easily detected by means of the sensor. When the respective wing approaches the sensor and the distance falls below a threshold value, the sensor generates a corresponding switching edge that alternates between high and low.
  • the vanes are spaced apart from one another uniformly, in particular regularly, in the circumferential direction.
  • the advantage here is that the wing is easy to produce balanced.
  • the vanes are spaced apart from one another unevenly in the circumferential direction, in particular irregularly, and/or extend to different extents in the circumferential direction.
  • the advantage here is that coding can be achieved and thus a direction of rotation can be identified.
  • a direction detection is simple and easy to code, in particular by a strictly monotonically increasing wing width in the circumferential direction of the wings arranged one after the other as seen in the circumferential direction.
  • the encoder is balanced.
  • the advantage here is that no imbalance is entered into the system.
  • one of the wings is formed from two wing regions, with a first of the wing regions being spaced apart from the second of the wing regions in the circumferential direction wing areas.
  • the holding part has a yoke area with which two spaced-apart web areas are connected and made in one piece, in particular in one piece.
  • a threaded hole is made in each web area, into which a screw is screwed, which protrudes through a grille opening of the fan grille of the fan shroud and whose screw head presses against the inside of the fan shroud.
  • the area covered by the holding part in the axial direction ie in particular in the direction parallel to the axis of rotation of the rotor shaft, includes the area covered by the encoder in the axial direction.
  • the senor is spaced apart from the encoder, in particular in the axial direction.
  • the advantage here is that during the rotary movement of the wings the distance falls below a threshold value and can be detected.
  • a receiving area is formed in the yoke area of the sensor, in which the sensor is accommodated, in particular the receiving area being designed as a round hole running through the yoke area in the axial direction.
  • the fan wheel is spaced apart from the holding part in the axial direction.
  • the advantage here is that the fan wheel can be arranged inside the fan cowl and is therefore well protected, with the holding part being able to be arranged outside the fan cowl. This prevents the fan from generating interference signals.
  • the receiving area is formed as a round hole that runs through the yoke area in the axial direction and/or has a smallest clear internal diameter, the value of which is the same as the value of the outer diameter of the sensor, in particular within the receiving area, in particular with the sensor having an external thread area , onto which a first and a second hexagonal nut are screwed, the first hexagonal nut resting on the side of the holding part facing away from the fan shroud and the second hexagonal nut lying on the side of the holding part facing the fan shroud, in particular with the receiving area being designed without a thread.
  • the advantage here is that a simple attachment can be achieved, with the sensor being able to be centered with its external thread area in the round hole. Further advantages result from the dependent claims. The invention is not on that
  • FIG. 1 shows an oblique view of a sensor arrangement fastened on a fan cover 1 of an electric motor.
  • the fan cover 1 is shown in an oblique view.
  • FIG. 3 shows a holding part 3 in an oblique view.
  • FIG. 4 shows a transmitter in an oblique view.
  • FIG. 5 shows a sensor in an oblique view.
  • the rotor shaft of the electric motor protrudes through the fan hood 1 and is non-rotatably connected to a transmitter 2 on the side of the fan hood 1 facing away from the stator housing.
  • the encoder 2 has two wings and is made of a ferromagnetic material such as steel.
  • the sensor 4 is preferably designed as an inductive proximity sensor, in particular a proximity switch, and is accommodated in an accommodating area 30 of the holding part 3 .
  • the receiving area 30 is integrated into a yoke area 32 of the holding part 3 .
  • the yoke area 32 is connected to a web area 31 at two spaced-apart locations.
  • the receiving area 30 is thus arranged between the two web areas 31 .
  • the two web areas each have a threaded hole in their end area facing the fan cowl 1, into which a screw is screwed, the screw head of which is pressed against the inside of the fan cowl 1 and the web area 31 is thus pressed from the outside onto the fan cowl 1, in particular with washers classifiable between the web area 31 and the fan cowl 1 and/or between the screw head and the fan cowl 1.
  • the sensor 4 is arranged and accommodated in the holding part 3 in such a way that when the encoder 2 rotates, the approach of a respective wing of the encoder 2 can be detected by means of the sensor 4 . If the distance between the sensor 4 and the wing falls below a threshold value, the sensor outputs a corresponding value of the sensor signal, for example a HIGH, and otherwise a different value, for example LOW.
  • a fan wheel is arranged inside the fan cowl 1 and is also connected in a rotationally fixed manner to the rotor shaft.
  • the fan hood has a fan grille which has grille openings.
  • the lattice openings preferably form a two-dimensional, in particular two-dimensional, regular arrangement of lattice openings.
  • Each of the screws protrudes through a respective one of the grid openings. A simple and secure attachment of the holding part 3 to the outside of the fan cowl 1 is thus achieved.
  • the wing is designed as a metallic circle segment, the circle segment having an opening angle between 50° and 120°, in particular an opening angle of 90°. This ensures reliable detection even at high speeds.
  • the senor has an externally threaded portion onto which two hex nuts are screwed.
  • the first of the hexagon nuts lies on the side of the holding part 3 facing away from the fan cowl 1 and the second hexagon nut lies on the other side of the holding part 3, i.e. in particular on the side of the holding part 3 facing the fan cowl 1.
  • the receiving area 30 is preferably designed without a thread, with the inside diameter of the cylindrical receiving area 30 being equal to the outside diameter of the externally threaded area of the sensor.
  • the transmitter 2 has a different number of wings instead of two.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)

Abstract

Moteur électrique avec carter de stator et capot de ventilateur, un transmetteur métallique étant relié solidaire en rotation à l'arbre de rotor, un élément de retenue, dans lequel est logé un capteur, étant fixé sur le capot de ventilateur sur le côté opposé au carter de stator, et un arbre de rotor du moteur électrique, lequel arbre est monté rotatif par rapport au carter de stator, s'étendant à travers le capot de ventilateur.
EP22725167.5A 2021-05-19 2022-04-26 Moteur électrique avec carter de stator et capot de ventilateur Pending EP4342060A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202110547015.XA CN115378198A (zh) 2021-05-19 2021-05-19 具有定子壳体和风机罩的电机
DE102021003632 2021-07-14
PCT/EP2022/025183 WO2022242903A1 (fr) 2021-05-19 2022-04-26 Moteur électrique avec carter de stator et capot de ventilateur

Publications (1)

Publication Number Publication Date
EP4342060A1 true EP4342060A1 (fr) 2024-03-27

Family

ID=81841944

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22725167.5A Pending EP4342060A1 (fr) 2021-05-19 2022-04-26 Moteur électrique avec carter de stator et capot de ventilateur

Country Status (3)

Country Link
EP (1) EP4342060A1 (fr)
DE (1) DE102022001454A1 (fr)
WO (1) WO2022242903A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12224651B2 (en) * 2019-12-04 2025-02-11 Sew-Eurodrive Gmbh & Co. Kg Electric motor having a fan guard and rotor shaft mounted rotatably relative to the fan guard and angle sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008028657B4 (de) * 2008-06-18 2024-01-18 Sew-Eurodrive Gmbh & Co Kg Elektromotor, der einen eine Welle aufweisenden Rotor, ein Gehäuse und einen Geber umfasst
DE102012004459B4 (de) * 2012-03-08 2022-02-10 Sew-Eurodrive Gmbh & Co Kg Antrieb mit Drehmomentstütze zur axial und radial weniger als in Umfangsrichtung steifen Befestigung des Gehäuses eines Winkelsensors an einem Lüfterhaubengitter eines Elektromotors
US9895148B2 (en) * 2015-03-06 2018-02-20 Ethicon Endo-Surgery, Llc Monitoring speed control and precision incrementing of motor for powered surgical instruments

Also Published As

Publication number Publication date
WO2022242903A1 (fr) 2022-11-24
DE102022001454A1 (de) 2022-11-24

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