CN1416203A - Direct current motor - Google Patents
Direct current motor Download PDFInfo
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- CN1416203A CN1416203A CN 02138240 CN02138240A CN1416203A CN 1416203 A CN1416203 A CN 1416203A CN 02138240 CN02138240 CN 02138240 CN 02138240 A CN02138240 A CN 02138240A CN 1416203 A CN1416203 A CN 1416203A
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- brush
- copper sheet
- box
- direct current
- rotor
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Abstract
The DC motor includes the front end cover, the rotating shaft, the chassis, the rotor, the rear end cover, the carbon brush box and the back cover shell. The magnet steels are the stator are adhibited on the internal walls of the front end cover and the rear end cover. The splitting structure with the dovetail slot in the middle is adopted in the rotating shaft. The rotor composed of N pieces of lambdoidal sheet copper and a batch of the silicon steel plate is embedded in the dovetail slot. There is the groove on two sides of the outer end of each sheet copper. The slice of short-circuit with clips on two ends locks each sheet copper. The fan blade is installed in the back cover shell. The DC motor possesses the advantages of large power, lightweight, small volume, high efficiency and long service life.
Description
Affiliated technical field
The present invention relates to a kind of motor, especially rare earth disc type direct current machine.
Background technology
Chinese patent CN1052584C has announced a kind of special direct current machine, this special direct current machine mainly is made up of casing, front end housing, beaming roller, rear end cap, the inwall of front end housing and rear end cap all posts magnet steel, the middle part of beaming roller has wedge-shaped slot and is inlaid with the copper sheet that quantity is N, one folded silicon steel sheet is housed between the above-mentioned copper sheet, both are pressed on together, and have the outer end of encircling each copper sheet of opening circuit to be bound up, and commutation seat, brush and two junction blocks are housed in the endoporus of rear end cap.This motor, at first two junction blocks are very easy to heating, because of contact-making surface is too little, and the copper sleeve of usefulness is contained on the bolt of M8, and bolt will blow when contact resistance is big, and rotating speed is very high, in the time of 24 volts be 2291r.p.m. as with 72 volts, more than the minimum 7000r.p.m. of rotating speed, not balance is arranged slightly, will cause vibration and noise, also bring difficulty to the decelerator manufacturing; Open circuit ring when load is excessive or start-up time when slightly long (during the battery vehicle climbing is exactly this kind situation), this moment, electric current can produce excessive temperature when flowing through rotor, and the ring that will cause opening circuit is gone up melts soldering tin, and caused this U-shaped ring that opens circuit to come off, motor is opened circuit, can't work or burn out; And brush and brush pigtail are by rivet, contact resistance is very big, more make the brush temperature rise very high, and the riveting knot is unreliable, cause the riveting node loosening easily in the friction, thereby contact resistance further strengthens, and the big electric current that flows through this moment makes the loosening riveted joint place of brush produce arc light and brush is burnt.The embodiment two of this patent disclosure is the scheme of a mistake, can't realize.
Summary of the invention
The objective of the invention is to solve the technical deficiency that above-mentioned special direct current machine exists, provide a kind of power big, in light weight, volume is little, efficient height, the direct current machine of long service life and stable performance.
Purpose of the present invention is achieved through the following technical solutions:
A kind of direct current machine, comprise front end housing, casing, rotor, rear end cap, brush-box cover, brush-box, fan blade, rear casing, the inwall of front end housing and rear end cap all posts magnet steel as stator, rotating shaft is the split-type structural that the middle part has dovetail groove, rotor by quantity be being of N sheet lambdoid copper sheet and two copper sheets between a folded silicon steel sheet be housed form, rotor is embedded in the dovetail groove of rotating shaft, forms the quantity N=PY of the copper sheet of above-mentioned rotor
k± 1, wherein P is magnetic circuit number of poles, the Y of motor stator magnetic circuit
kThe copper sheet number that holds in extremely for the magnetic circuit of each stator; The both sides, outer end of every copper sheet all offer groove, and have the short-circuit piece of double headed roller clip that the outer end card of each copper sheet is tied together, and fan blade is housed in the rear casing.The magnet steel that every adjacent two N-S are extremely relative in the stator constitutes a magnetic circuit utmost point, Y
kBe the commutator segment number, i.e. the rotor number of turn of each magnetic circuit in extremely also is the quantity of the copper sheet that holds in extremely of each magnetic circuit.
Above-mentioned magnet steel is a pentagon, only keep minimum commutating zone, so that also partly cut off the magnetic line of force on the tie of outer end, to guarantee to produce voltage or moment maximum, rotating speed descends, above-mentioned brush-box is loaded in the endoporus of rear end cap, and eight brushes are equipped with in the inside of brush-box, and lateral surface is equipped with the junction block that four high-quality coppers become.
Above-mentioned brush-box is installed on the casing, and the quantity of brush-box is eight, and the inside of each brush-box is equipped with a carbon brush and is connected with junction block, and this moment, carbon brush just rotated on the rotor cylindrical, and cylindrical and carbon brush are just formed commutator.
Above-mentioned front end housing and rear end cap inwall post magnet steel, and quantity is eight, form four couples of utmost points, i.e. P=4.
The quantity of above-mentioned copper sheet is 127, and described copper sheet is coated with insulation film on the surface of dovetail groove and the direct contact position of rotor circumferential periphery copper sheet.
Above-mentioned carbon brush live part is a wedge shape, and non-live part end center is cylindrical, and purpose is to separate a hole in cylindrical central, and the pile things on brush lead is the connection lead in this endoporus again.It is firm to guarantee that like this brush lead contacts with carbon brush.
The quantity N sheet of forming the copper sheet of rotor winding among the present invention after the requirement of satisfying motor use ceiling voltage, and requires each magnetic circuit utmost point to run through Y
kAfter the distance of individual copper sheet, must be in preceding a slice or back a slice of first copper sheet, both wiring is satisfactory like this, can produce maximum electromotive force or moment again, because this motor is by single ripple designed motor.Must insulate in the adjacent two copper sheet outer ends in the outer end of every copper sheet and the left and right sides, and make the short-circuit piece of double headed roller clip that knot is firmly blocked together by the regulation of wiring in the outer end of each copper sheet, form the rotor winding, can prevent the high temperature that electric motor starting time length or load produce when very big, and cause melts soldering tin short circuit sheet to come off, prevent that just motor from burning out; Installing fan blade additional can effectively lower the temperature, magnet steel adopts pentagon, not only can adapt to motor windings and be radial, and the sky that can make full use of stator to, thereby improve the magnetic flux that passes the rotor winding and produce bigger moment of torsion, two of copper sheet effective edges are between two magnetic poles in addition, an effective edge is positioned at certain point of the N utmost point, then another effective edge is located in certain respective point of the S utmost point, distance between two effective edges just is a pole span, power on this moment copper sheet on two effective edges is exactly algebraical sum, and winding can produce maximum moment on the comprehensive rotor; Four junction blocks are installed on the brush-box, each junction block connects two carbon brush, then the electric current that passes through on it is less, and the heat of generation is also less, and is less to the carbon brush influence, and carbon brush adopts special shape and endoporus to press brush lead, can prevent that under the situation of carbon brush wearing and tearing iron ring and the continuation friction of winding plane because of motor works on and makes carbon brush riveting node produce bigger spark, even the scuffing copper sheet, burn out motor; Copper sheet is at the local cover film of key, and further the reinforced insulation effect prevents that spark from producing, and causes the work of motor safety and reliability; Brush-box also can be retrofitted in the surface at casing, the short circuit sheet of outer end that promptly utilizes copper sheet is as the commutator commutator, contacted with it like this carbon brush contact-making surface can strengthen, current density by carbon brush is just little, the heat that produces is also few, can prolong the life-span of carbon brush, but cylindrical must requirement on machining accuracy.Dc traction motor of the present invention, it is big, in light weight to have power, and volume is little, efficient height, long service life and stable performance.
Description of drawings
Fig. 1 is a structure chart of the present invention;
Fig. 2 is the structural representation of Fig. 1 shaft and rotor;
Fig. 3 is the copper sheet scheme of installation that Fig. 1 forms rotor;
Fig. 4 be among Fig. 3 single copper sheet make figure;
Fig. 5 is the expanded view of copper sheet among Fig. 4;
Fig. 6 is the rear end cap structural representation;
Fig. 7 is the brush-box structural representation;
Fig. 8 is the structural representation of carbon brush;
Fig. 9 is the structural representation of short-circuit piece.
Figure 10 is the structural representation of embodiment two;
Embodiment
Embodiment one, among Fig. 1 to 9, direct current machine of the present invention, by front end housing 1, rotating shaft 2, casing 3, rotor 4, rear end cap 5, brush-box cover 6, brush-box 7, rear casing 8 formations such as grade, wherein casing 3 adopts the cold-reduced sheet punch forming, offer two row's both forward and reverse directions on every side and open the ventilation hole of wing, casing 3 left ends and front end housing 1 link together, on front end housing 1 inwall, post the extremely staggered pentagon magnet steel 9 of eight N utmost points and S, at the center of front end housing 1 rotating shaft 2 is installed, rotor winding and rotor core assembly are housed in the rotating shaft 2 form rotor 4, rotor winding and rotor core assembly are equipped with a folded silicon steel sheet 42 and form by being between lambdoid copper sheet 41 and each copper sheet 41, the quantity of copper sheet 41 is 127, all should insulate in the both sides, outer end of every copper sheet 41 adjacent copper sheets 41 with front and back, and by the short-circuit piece 10 of double headed roller clip each copper sheet 41 is connected together in accordance with regulations and forms the rotor winding.
The right-hand member of casing 3 is connected with rear end cap 5, the inwall of rear end cap 5 also posts eight N utmost points and the extremely staggered pentagon magnet steel 9 of S, magnet steel 9 position consistency with front end housing 1 inwall, but the N-S utmost point of front and rear cover 1,5 upper magnetic steels 9 also staggers mutually, be that the rear end cap 5 that N is extremely corresponding on the front end housing 1 must be the S utmost point, cause the N-S-N-S magnetic circuit utmost point that partners, because the magnet steel 9 among the present invention on the front and rear cover 1,5 is eight, so magnetic circuit number of poles P=4 that forms, reaching magnetic source distributes rationally, magnetic circuit is the shortest, has higher the action of a magnetic field.Brush-box 7, outer cover brush-box cover 6 are housed in the central bore of rear end cap 5, it is that wedge shape, invalid part center are cylindrical carbon brush 71 that eight live parts are housed in the brush-box 7, make a call to an endoporus 711 at the cylinder center, press in the endoporus 711 and the sintering brush lead; The lateral surface of brush-box 7 is equipped with four junction blocks made from copper plate 72, and each junction block 72 connects 71, four junction blocks 72 of two carbon brush and is divided into two groups, guides on the rear end cap 5 two brass screws lead-in wire of connecting with the mains again by lead.The axle head that goes out of brush-box 7 is installed fan blade 11, and rear casing 8 covers fan blade 11.Among Fig. 4, have in the middle of it width be the groove of 1.5-3mm by copper sheet 41 thickness and the decision of punch die possibility, the smaller the better in theory.Purpose is to get final product for a copper sheet 41 can be divided into both sides.Fig. 5 represents that copper sheet 41 from copper sheet 41 center lines separately and be bent into lambdoid expanded view, by press be pressed into angle [alpha]=45 ° 21 of bending ', β=22 ° 40 ', 41 liang of outer end center lines of each shaping copper sheet are approximately 1/4th of rotor 4 positions at a distance of the position, Fig. 3 is the installation situation of copper sheet 41, and the surface of each copper sheet 41 is covered with insulating varnish, at wedge-shaped slot and the direct contact position of copper sheet, rotor neighboring cover film 12.
Embodiment two, as shown in figure 10, brush-box 7 and carbon brush 71 are installed on the casing 3, promptly select for use the outer end of the copper sheet 41 of forming rotor 4 to make commutator (commutator), just must recharge insulating material in so every adjacent two short-circuit pieces 10, and it is very round to require cylindrical just should make, and other are consistent with embodiment one.
After two brass screw energized, electric current circulates in the rotor winding by brush on the end cap, produces moment and begin rotation under the magnetic steel of stator effect, change input power positive cathode, then just counter-rotating of motor.
Claims (7)
1, a kind of direct current machine, comprise front end housing (1), rotating shaft (2), casing (3), rotor (4), rear end cap (5), brush-box cover (6), brush-box (7), rear casing (8), the inwall of front end housing (1) and rear end cap (5) all posts magnet steel (9) as stator, rotating shaft (2) has the split-type structural of dovetail groove (21) for the middle part, rotor (4) is a folded silicon steel sheet (42) to be housed between lambdoid copper sheet of being of N sheet (41) and two copper sheets (41) form by quantity, rotor (4) is embedded in the dovetail groove (21) of rotating shaft (2), it is characterized in that: the quantity N=PY that forms the copper sheet (41) of above-mentioned rotor (4)
k± 1, wherein P is magnetic circuit number of poles, the Y of motor stator magnetic circuit
kCopper sheet (41) number that holds in extremely for the magnetic circuit of each stator, the both sides, outer end of every copper sheet (41) all offer groove (411), and have the short-circuit piece (10) of double headed roller clip that the outer end card of each copper sheet (41) is tied together, fan blade (11) is housed in the rear casing.
2, direct current machine according to claim 1, it is characterized in that: magnet steel (9) is a pentagon, brush-box (7) is loaded in the endoporus (51) of rear end cap (5), and eight carbon brush (71) are equipped with in the inside of brush-box (7), lateral surface is equipped with four junction blocks (72).
3, direct current machine according to claim 1 is characterized in that: brush-box (7) is installed on the casing (3), and the quantity of brush-box (7) is four or eight, and a carbon brush (71) is equipped with in the inside of each brush-box (7).
4, direct current machine according to claim 1 is characterized in that: the quantity N=127 sheet of copper sheet (41).
5, direct current machine according to claim 1 and 2 is characterized in that: the quantity of posting magnet steel (9) on the front and rear cover (1,5) is eight, forms four pairs of utmost points.
6, according to claim 1 or 4 described direct current machines, it is characterized in that: copper sheet (41) is coated with insulation film (12) on the surface of dovetail groove (21) and the direct contact position of rotor circumferential periphery copper sheet.
7, according to claim 1 or 2 or 3 described direct current machines, it is characterized in that: an end of carbon brush (71) wiring is toroidal in the center, offers endoporus (711) in its round part, and sintering has lead in this endoporus (711).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021382409A CN100464482C (en) | 2002-09-06 | 2002-09-06 | Direct current motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021382409A CN100464482C (en) | 2002-09-06 | 2002-09-06 | Direct current motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1416203A true CN1416203A (en) | 2003-05-07 |
| CN100464482C CN100464482C (en) | 2009-02-25 |
Family
ID=4749369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021382409A Expired - Fee Related CN100464482C (en) | 2002-09-06 | 2002-09-06 | Direct current motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100464482C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161674A (en) * | 2011-12-16 | 2013-06-19 | 沈坤元 | Direct-driven permanent magnet synchronization disc multi-combination large-power vertical type wind generating set |
| CN105048717A (en) * | 2015-07-27 | 2015-11-11 | 湖南德力科威科技有限公司 | Winding armature of permanent-magnet direct current motor |
| CN108736613A (en) * | 2018-06-08 | 2018-11-02 | 李洋涛 | A kind of axial double magnetic circuit pressure cooled high efficiency motor |
| CN108768118A (en) * | 2018-06-29 | 2018-11-06 | 李洋涛 | A kind of compulsive-cooling radial flux permanent magnet synchronous motor based on board-like winding |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87204284U (en) * | 1987-05-29 | 1988-08-03 | 石楚平 | Automatic commutating micro dc motor |
| CN1052584C (en) * | 1996-07-26 | 2000-05-17 | 周国君 | Special d.c. electric motor |
| US6236138B1 (en) * | 1998-06-25 | 2001-05-22 | David H. Rush | Electro mechanical machine and armature structure therefor |
-
2002
- 2002-09-06 CN CNB021382409A patent/CN100464482C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161674A (en) * | 2011-12-16 | 2013-06-19 | 沈坤元 | Direct-driven permanent magnet synchronization disc multi-combination large-power vertical type wind generating set |
| CN103161674B (en) * | 2011-12-16 | 2019-01-11 | 沈坤元 | A kind of direct-driven permanent magnet synchronization disc multi-combination large-power vertical type wind power generating set |
| CN105048717A (en) * | 2015-07-27 | 2015-11-11 | 湖南德力科威科技有限公司 | Winding armature of permanent-magnet direct current motor |
| CN108736613A (en) * | 2018-06-08 | 2018-11-02 | 李洋涛 | A kind of axial double magnetic circuit pressure cooled high efficiency motor |
| CN108768118A (en) * | 2018-06-29 | 2018-11-06 | 李洋涛 | A kind of compulsive-cooling radial flux permanent magnet synchronous motor based on board-like winding |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100464482C (en) | 2009-02-25 |
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20100906 |