GB2032200A - Dynamo-electrical Machine Stator - Google Patents
Dynamo-electrical Machine Stator Download PDFInfo
- Publication number
- GB2032200A GB2032200A GB7933622A GB7933622A GB2032200A GB 2032200 A GB2032200 A GB 2032200A GB 7933622 A GB7933622 A GB 7933622A GB 7933622 A GB7933622 A GB 7933622A GB 2032200 A GB2032200 A GB 2032200A
- Authority
- GB
- United Kingdom
- Prior art keywords
- stator
- circuit board
- winding
- conductors
- temperature monitor
- 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
Links
- 238000004804 winding Methods 0.000 claims abstract description 49
- 239000004020 conductor Substances 0.000 claims abstract description 27
- 238000003475 lamination Methods 0.000 claims abstract description 9
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 7
- 238000005266 casting Methods 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- 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
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/03—Machines characterised by the wiring boards, i.e. printed circuit boards or similar structures for connecting the winding terminations
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Supercharger (AREA)
- Braking Arrangements (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
A stator for a dynamo-electrical machine includes a temperature monitor (4) for detecting overloading of the stator winding, which monitor is secured to a circuit board (3), and can be reset from externally. Conductors (5-9) printed on the circuit board (3) provide interconnection between, on the one hand, an external connecting cable (90) and, on the other hand, the temperature monitor (4) and the stator winding ends. The circuit board (3) is secured, at one end of the stator in front of a winding head (11) which projects beyond the adjacent end of a stator laminations assembly (10), to a collar of a plate (1) comprising insulating material which abuts the adjacent end of the stack of laminations (10). An advantageous application of the stator is in motors of the external rotor type. <IMAGE>
Description
SPECIFICATION
Dynamo-Electrical Machine Stator
The invention relates to a stator of a dynamoelectrical machine. Although the stator is primarily intended for a machine of the external rotor type (i.e. the rotor surrounds the stator), the stator can be used in an electrical machine of more common construction in which the rotor is mounted within and surrounded by the stator.
According to the invention there is provided a stator of a dynamo-electrical machine, having a circuit board secured, at one end of the stator in front of a winding head which projects beyond the adjacent end of a stator laminations assembly, to a collar of a plate comprising insulating material which abuts the said end of the laminations assembly, and a temperature monitor on the circuit board arranged to detect an overload condition of the stator winding, the circuit board having imprinted conductors thereon which collectively provide interconnection between on the one hand the winding ends of the stator winding and the external electrical connection points of the temperature monitor and on the other hand further electrical connection points for the connection thereto of an external connecting cable, the imprinted conductors to which the temperature monitor is connected being arranged on the circuit board to extend proximate the temperature monitor and being metallurgically united with the external connection points of the temperature monitor.
Provision can be made for several conductors to be imprinted on the front face of the circuit board, which is remote from the said winding head, and for the temperature monitor, which is operative to interrupt supply of power to the stator winding upon detecting an overload condition and capable of being reset to an operative condition, for example using a switch button, to be secured to this front face.In order that despite the mounting space demanded by the temperature monitor on the circuit board and the several imprinted conductors, simple and reliable contacting between the ends of the stator winding and the conductors may be achieved while retaining a compact type of construction, according to a preferred feature of the invention provision is made for at least the conductors which are connected with the winding ends of the stator winding to have crosspieces which project outwards towards the edge of the circuit board, and for the circuit board to have openings therein adjacent the sides of the cross-pieces, through which openings the ends of the stator winding pass for electrical contact with the cross-pieces.
No additional radial mounting space is thereby required in order to join the winding ends of the stator winding to the imprinted conductors, more particularly if the latter are imprinted on the outwardly pointing front face of the circuit board.
Insertion of the winding ends into the openings and contacting with the conductors prior to the actual soldering process (or other metallurgically uniting process) can be further simplified if each opening in the circuit board takes the form of a slit and the several slits are arranged in pairs, the slits of each pair being arranged one on each side of an associated said cross-piece so as to be open to the side faces and also the tangential end face of the cross-piece, the winding ends being wound in the slits around the cross-pieces.
For a better understanding of the present invention and to show how the same may be carried into effect reference will now be made, by way of example, to the accompanying drawings in which: Figure 1 shows a longitudinal section through a stator of an electric motor of the external rotor type having a circuit board arranged at front end and having a temperature monitor,
Figure 2 shows a front-end plan view of the stator of Figure 1, the connection of the ends of the stator winding with the circuit board not being shown, and
Figure 3 shows a detailed cutaway portion of
Figure 2, showing the connection of one of the ends of the stator winding with the circuit board.
Referring to Figure 1, there is shown the stator of an electric motor of the external rotor type in which the rotor (not shown) envelopes the stator around its entire periphery and closes-off the bottom end of the stator while a fixed bearing plate at the top closes-off the other stator end.
The wound stator winding assembly has winding heads 11, 12 which project beyond the two axial ends of the stack of laminations 10 of the stator.
The winding heads 11, 1 2 are each insulated from the adjacent ends of the stack of laminations
10 and from an inner tube, not shown in greater detail here, which receives the shaft of the outer bell-like rotor, by means of a plate 1 and 2 respectively, comprising insulating material. A circuit board 3 is secured to a collar of the plate (1) which projects outwards in an axial manner beyond the winding head, such that the collar is exposed to the front face of the winding head 11.
As can be seen more particularly from Figure 2, the circuit board 3 is provided with imprinted copper conductors 5 to 9 on its outer, exposed face. The several copper conductors lead on the right, outer side of the circuit board 3 to a connection region to which there is brought the external connecting cable 90. For the purpose of connecting the external motor connecting cable 90 to connection points on the conductors, the circuit board 3 and the conductors 5 to 9 are advantageously formed with insertion apertures for the cable ends 91 to 94 of the external motor connecting cable 90 to which are subsequently to be soldered-on or metallurgically united in some other manner with the conductors 5 to 9.
The external electrical connection points 41, 42 and 43 respectively of a temperature monitor 4 are metallurgically united (e.g. by soldering) with the corresponding conductors 8, 9 and 5 respectively on the side of the circuit board 3 opposite the connections with the external motor connecting cable 90. The function of the temperature-monitor is to detect overload conditions in the stator winding. The temperature monitor 4 abuts the circuit board 3 on the rear side and is provided on its external, front face with an operating button 45 with the aid of which the temperature switch 4 can be reset (switched-on again) by hand from the outside following a response, in the event of over-loading of the motor, to interrupt supply of power to the stator winding.
For the purpose of connecting the ends of the stator winding with the conductors 5, 6, 7 the latter are provided with cross-pieces 51, 61, 71 directed outwards in a radial manner, and the circuit board 3 has openings therein in the region of the laterally outer end portions of the crosspieces. Conveniently, in the illustrated constructional example, these openings are in form of slits arranged in pairs 21, 22 and 23, 24, 25 and 26 respectively, the slits of each pair being arranged one at each side of an associated cross-piece 51, 61 or 71 so as to be open to the side faces and also the tangential end face of the cross-piece.
During assembly of the stator, after the plates 1, 2 comprising insulating material have been placed on the stack of laminations 10, the stator winding is inserted in such a manner that the plates 1, 2 comprising insulating material are positioned by the winding heads 11, 12. The circuit board 3 is subsequently secured to the collar of the plate 1 comprising insulating material and the ends of the motor winding are inserted in the slits 21,22 and 23, 24 and 25,26 respectively in the circuit board 3 on either side of the cross-pieces 51 and 61 and 71, respectively, and are wound one of more times around the cross-pieces 51, 61, 71 (Figure 3) such that provisional mounting of the ends of the motor winding on the conductors before soldering is
ensured. Following this, the ends of the motor winding are soldered to the cross-pieces 51, 61,
71.
Before mounting the temperature monitor 4
and the external motor connecting cable 9, the
stator winding heads 11, 1 2 together with the
circuit board 3 are impregnated in casting resin.
Advantageously, the temperature monitor 4 and the cable ends 91-94 of the external motor
connecting cable are only subsequently soldered
to the connection points on the conductors 6, 7,
8, 9, which connection points are not covered by
the impregnating agent. This can be achieved by
covering the connection points with a layer of wax
before impregnating with casting resin. In this
way, it is not necessary to seal the temperature
monitor 4 from the casting resin or to use
particularly thermally resistant supply lines for the
external motor connecting cable 90.At the same
time, in addition to the advantageous feature that
because the connecting cable 90 is connected to
the circuit board rather than directly to the stator
windings, any unauthorised traction effort applied
to the cable (for example to lift the complete
motor by the cable) is not transmitted to the
rather delicate rotor winding ends, the stator
construction disclosed herein affords local
separation between the various points at which
interconnection is made between the imprinted
conductors and the stator winding ends,
temperature monitor and the connecting cable, so
that during assembly the individual connections
can be made without interfering with one another.
In addition, the circuit board 3 offers simple and
stable mounting for the temperature monitor 4
and switch button 45 which can be operated from
the outside, for example using finger pressure.
Thus, with the stator construction described as
adopted in a dynamo-electrical motor of the
external rotor type, the stator winding is protected
by the temperature monitor in a simple manner
using a compact type of construction, and to be
able to make adaption to specific machine ratings.
As a result of the construction adopted it is
possible on the one hand to mount and connect
the temperature monitor after construction of the
stator winding assembly has been completed, and
on the other hand to ensure, using simple means,
that the temperature monitor is mounted such
that for adaptation to specific machine ratings it is
capable of being operated from the outside, more
particularly is capable of being reset separately
again from the outside following a response in the
event of overloading.
Claims (7)
1. A stator of a dynamo-electrical machine,
having a circuit board secured, at one end of the
stator in front of a winding head which projects
beyond the adjacent end of a stator laminations
assembly, to a collar of a plate comprising
insulating material which abuts the said end of
the laminations assembly, and a temperature
monitor on the circuit board arranged to detect an
overload condition of the stator winding, the
circuit board having imprinted conductors thereon - which collectively provide interconnection
between on the one hand the winding ends of the
stator winding and the external electrical
connection points of the temperature monitor and
on the other hand further electrical connection
points for the connection thereto of an external
connecting cable, the imprinted conductors to
which the temperature monitor is connected
being arranged on the circuit board to extend
proximate the temperature monitor and being
metallurgically united with the external
connection points of the temperature monitor.
2. A stator according to claim 1, wherein the
several conductors are imprinted on the front face
of the circuit board which is remote from the said
winding head, and the temperature monitor,
which is operative to interrupt supply of power to
the stator winding upon detecting an overload
condition and is capable of being reset to an
operative condition, is secured to this front face.
3. A stator according to Claim 1 or 2, wherein
at least the conductors which are connected with
the winding ends of the stator winding have
cross-pieces which project outwards towards the edge of the circuit board, and the circuit board has openings therein adjacent the sides of the crosspieces, through which openings the ends of the stator winding pass for electrical contact with the cross-pieces.
4. A stator according to Claim 3, wherein each opening in the circuit board takes the form of a slit and the several slits are arranged in pairs, the slits of each pair being arranged one on each side of an associated said cross-piece so as to be open to the side faces and also the tangential end faces of the cross-piece, the winding ends being wound in the slits around the cross-pieces.
5. A stator according to any one of Claims 1 to 4, wherein for the purpose of connecting an external connecting cable, the circuit board and the several conductors are provided with insertion apertures for the cable ends of the connecting cable which are to be subsequently metallurgically united with the several conductors.
6. A stator according to any one of claims 1 to 5, wherein the said winding head and the circuit board, apart from the regions thereof where the temperature monitor is connected to the several conductors and the second-mentioned connection points on the conductors are situated, are impregnated in cast resin.
7. A stator of a dynamo-electrical machine, substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2842119A DE2842119C2 (en) | 1978-09-27 | 1978-09-27 | External rotor motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2032200A true GB2032200A (en) | 1980-04-30 |
| GB2032200B GB2032200B (en) | 1983-03-23 |
Family
ID=6050628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7933622A Expired GB2032200B (en) | 1978-09-27 | 1979-09-27 | Dynamo-electrical machine stator |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5549953A (en) |
| CH (1) | CH646018A5 (en) |
| DE (1) | DE2842119C2 (en) |
| DK (1) | DK402179A (en) |
| FR (1) | FR2437724B1 (en) |
| GB (1) | GB2032200B (en) |
| IT (1) | IT1123252B (en) |
| NO (1) | NO793054L (en) |
| SE (1) | SE444492B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2125636A (en) * | 1982-08-23 | 1984-03-07 | Seeley F F Nominees | Improvements in and relating to electric motors |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2500966A1 (en) * | 1981-01-12 | 1982-09-03 | Mulfingen Elektrobau Ebm | Multi-purpose electric fan - has two helical blades which bent forward or backward for providing air flow and motor cooling |
| EP0066644B1 (en) * | 1981-06-09 | 1985-03-20 | Siemens Aktiengesellschaft | Arrangement and method to connect the stator winding ends of a small motor |
| FR2527857A1 (en) * | 1982-05-27 | 1983-12-02 | Electro Hydraulique Seh | STATOR COIL ELECTRIC MOTOR AND METHOD OF MANUFACTURING THE SAME |
| DE4302449A1 (en) * | 1993-01-29 | 1994-08-04 | Miele & Cie | Vacuum cleaner with fan arrangement |
| FR2709889B1 (en) * | 1993-09-10 | 1995-12-08 | Crouzet Automatismes | Electric motor with thermal safety. |
| US8141231B2 (en) | 2003-09-15 | 2012-03-27 | Shop Vac | Electric motor |
| WO2009003478A2 (en) * | 2007-06-29 | 2009-01-08 | Vestas Wind Systems A/S | Thermal monitoring of doubly-fed generator |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2682005A (en) * | 1952-06-18 | 1954-06-22 | Gen Electric | Dynamoelectric machine overload protection system |
| DE1713025U (en) * | 1954-10-06 | 1955-12-15 | Festo Maschf Stoll G | ELECTRIC MOTOR DRIVEN HAND GRINDING DEVICE, IN PARTICULAR VIBRATION GRINDER. |
| DE1709515U (en) * | 1955-08-17 | 1955-10-27 | Oskar Luz | DEVICE FOR SECURING THREE-PHASE MOTORS AND THE LIKE. |
| DE1757681U (en) * | 1957-08-29 | 1957-12-12 | Georg Foeller | ELECTRIC SMALL MOTOR. |
| DE1141368B (en) * | 1961-12-28 | 1962-12-20 | Ellenberger & Poensgen | Motor protection switch or starter switch or combined motor protection and starter switch for electric motors |
| DE1930359B2 (en) * | 1969-06-14 | 1978-08-03 | Elektrobau Mulfingen Gmbh, 7119 Mulfingen | Connector for electric motor stator winding ends - has annular circuit board with printed copper paths forming connecting elements with fastenings to circuit board |
| DE2040465A1 (en) * | 1970-08-14 | 1972-02-17 | Siemens Ag | Electric machine with a ring-wound stand |
| DE2307458B2 (en) * | 1973-02-15 | 1974-11-28 | Elektrobau Mulfingen Gmbh, 7119 Mulfingen | Single-phase AC motor with running capacitor |
| US3984712A (en) * | 1974-11-11 | 1976-10-05 | Industra Products, Inc. | End turn shield and winding connector |
| DE2535609A1 (en) * | 1975-07-26 | 1977-02-10 | Papst Motoren Kg | External rotor motor for operation in aggressive media - has bushing in one piece with squirrel cage penetrating stator winding and surrounded by insulator |
| US4039875A (en) * | 1975-11-07 | 1977-08-02 | Computer Devices Corporation | Method and apparatus for interconnecting stator coils |
| DE2743837A1 (en) * | 1977-09-29 | 1979-04-05 | Siemens Ag | Short brushless DC motor with high acceleration - has permanent magnet rotor with same number of pole pairs as winding sections on stator (NL 2.4.79) |
-
1978
- 1978-09-27 DE DE2842119A patent/DE2842119C2/en not_active Expired
-
1979
- 1979-07-02 CH CH613979A patent/CH646018A5/en not_active IP Right Cessation
- 1979-09-19 SE SE7907765A patent/SE444492B/en not_active IP Right Cessation
- 1979-09-20 IT IT25874/79A patent/IT1123252B/en active
- 1979-09-24 NO NO793054A patent/NO793054L/en unknown
- 1979-09-26 DK DK402179A patent/DK402179A/en not_active Application Discontinuation
- 1979-09-26 JP JP12377179A patent/JPS5549953A/en active Pending
- 1979-09-26 FR FR7923989A patent/FR2437724B1/en not_active Expired
- 1979-09-27 GB GB7933622A patent/GB2032200B/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2125636A (en) * | 1982-08-23 | 1984-03-07 | Seeley F F Nominees | Improvements in and relating to electric motors |
| AU572468B2 (en) * | 1982-08-23 | 1988-05-12 | F F Seeley Nominees Pty Ltd | Connection guide for electric motor |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2842119B1 (en) | 1979-12-20 |
| IT1123252B (en) | 1986-04-30 |
| CH646018A5 (en) | 1984-10-31 |
| SE444492B (en) | 1986-04-14 |
| DE2842119C2 (en) | 1984-09-20 |
| GB2032200B (en) | 1983-03-23 |
| JPS5549953A (en) | 1980-04-11 |
| SE7907765L (en) | 1980-03-28 |
| NO793054L (en) | 1980-03-28 |
| IT7925874A0 (en) | 1979-09-20 |
| FR2437724B1 (en) | 1986-04-11 |
| DK402179A (en) | 1980-03-28 |
| FR2437724A1 (en) | 1980-04-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |