CN1111040A - DC small electric motor - Google Patents
DC small electric motor Download PDFInfo
- Publication number
- CN1111040A CN1111040A CN 95100642 CN95100642A CN1111040A CN 1111040 A CN1111040 A CN 1111040A CN 95100642 CN95100642 CN 95100642 CN 95100642 A CN95100642 A CN 95100642A CN 1111040 A CN1111040 A CN 1111040A
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- China
- Prior art keywords
- commutator
- motor
- slit
- electrolytic capacitor
- utmost point
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- Motor Or Generator Current Collectors (AREA)
Abstract
The invention relates to a small direct current motor used for a CD main axle, and the motor comprises an exciting magnet with two magnetized electrodes in the circumferential direction of the internal diameter part of a frame, and a commutator which is provided with three variable magnetic poles arranged at equal intervals in the circumferential direction relative to the exciting magnet and rotates together with the variable magnetic poles, and also comprises an armature combination used for the commutator to cause the variation magnetic field to change. The invention is characterized in that the small direct current motor also comprises a triangular or Y-shaped electrolytic capacitor of a protective element, and the triangular or Y-shaped electrolytic capacitor is connected between the slits of the commutator and used for restraining electric sparks between the slits of the commutator.
Description
The present invention relates to the small-sized DC motor of the spindle drive motor used as disc such as CD, discs such as this CD are used for sound equipment, image projection device or recording medium.
In recent years, along with the expansion in small-sized DC motor market, the utmost point needs further miniaturization, improves the quality, performance, reliability and life-span, and shortens the access time.
The following describes the small-sized DC motor of prior art.
Fig. 5 is the armature installation diagram of the small-sized DC motor of prior art.Among Fig. 5,1 for rotating shaft, and 2 be coil, and 3 be unshakable in one's determination, and 4 for making coil 2 and unshakable in one's determination 3 insulators that insulate, and 5 is commutator, and 51 is commutator riser portion (riser), by making it to switch on and be connected with coil welding etc.52 is slit, and 6 is piezo-resistance (varistor), and it and commutator riser portion 51 weld.
Fig. 4 is the winding diagram of the small-sized DC motor of prior art.
The following describes the action of the small-sized DC motor of said structure.In order to make the armature rotation, give a pair of brush power supply then changing magnetic pole.The commutator slit portion that this variation magnetic pole switches can produce electric spark, thereby makes commutator, brush sliding contacting part become coarse or misplace, and the motor life-span is descended.In order to absorb electric spark, use piezo-resistance as protection component.
But in the structure of above-mentioned prior art, because the electrostatic capacitance little (several nF) of piezo-resistance, so for the spindle drive motor of the CD under use and Fraquent start under high voltage, the big electric current, the service condition that stops, therefore the effect of piezo-resistance is not remarkable, exists that wearing and tearing, commutator slit gap because of commutator, brush is blocked to produce the problem that short circuit makes the decline of motor life-span.
The present invention will solve the problem of above-mentioned prior art, and its purpose is to provide long reliability of a kind of life-span the high small-sized DC motor as the CD spindle drive motor, and this motor can be applicable under high voltage, the big electric current and starts continually, stops.
For finishing the foregoing invention purpose, small-sized DC motor of the present invention has following structure.With static capacity big (0.01-100 μ F) and the electrolytic capacitor of small-sized (Φ 2 * 3-Φ 6 * 8) as the protection component that absorbs commutator slit portion spark, be connected in star-star-delta connection Y-Y-or Y connection between each slit of commutator.
CD main shaft small-sized DC motor of the present invention, have: have 2 utmost points (the N utmost point on the framework inside diameter circumferencial direction, the S utmost point) there is rotating shaft at magnetized exciting magnet and center, has 3 variation magnetic poles that uniformly-spaced are provided with in a circumferential direction with respect to above-mentioned exciting magnet simultaneously, and with the commutator that this variation magnetic pole rotates, also have: the armature that the variation magnetic field is changed with described commutator makes up; Have as with commutator in the brush of a pair of (+the utmost point ,-utmost point) of electric coconnected structure, terminal board combination and fix the carriage of this brush, terminal board combination; Bearing with supporting rotating shaft is characterized in that, also has: △ shape is connected in the electrolytic capacitor of the protection component of the electric spark between the above-mentioned commutator slit of conduct inhibition between each slit of described commutator.
But described electrolytic capacitor also Y shape is connected between each slit of described commutator.
Press said structure, can be absorbed in the spark that the CD that uses under the high-voltage large current and start continually, stop to use the commutator slit portion generation of spindle drive motor reliably.
Below in conjunction with accompanying drawing illustrated embodiment explanation the present invention.
Fig. 1 is the armature installation diagram of the small-sized DC motor of first embodiment of the invention;
Fig. 2 is the winding diagram of the small-sized DC motor of first embodiment of the invention;
Fig. 3 is the winding diagram of second embodiment of the present invention small-sized DC motor;
Fig. 4 is the winding diagram of the small-sized DC motor of prior art;
Fig. 5 is the installation diagram of the small-sized DC motor of prior art;
Embodiment one
Fig. 1 is the armature assembly drawing of one embodiment of the invention.Among the figure, 1 for rotating shaft, and 2 be coil, and 3 is iron core, and 4 is insulator, and 5 is commutator, and 51 is commutator riser portion, and 52 is the commutator slit portion, and 7 is the electrolytic capacitor of aluminium electrolytic capacitor etc., and its terminal is welded in the commutator riser portion 51.
Fig. 2 has shown the winding diagram of the small-sized DC motor of said structure.
Among Fig. 2,2 is winding coil, and 5 is commutator, and 52 is the commutator slit portion, and 7 is the electrolytic capacitor of aluminium matter electrochemical capacitor etc., carries out the wiring of △ shape 52 of commutator slit portions.
According to the foregoing description, △ shape connects electrolytic capacitor between each slit of commutator, can reliably be absorbed in the electric spark of the commutator slit portion generation of Fraquent start withdraw from service CD spindle drive motor under the high-voltage large current, therefore can suppress to stop up the short circuit phenomenon that causes because of the wearing and tearing and the commutator slit gap of commutator, brush.
Embodiment two
The second embodiment of the present invention is described with reference to the accompanying drawings.
Its structure is identical with first embodiment, and Fig. 3 represents the winding diagram of this small-sized DC motor.
Among Fig. 3,2 is winding coil, and 5 is commutator, and 52 is the commutator slit portion, and 7 is the electrolytic capacitor of alminium electrolytic condenser etc., and they are connected between the commutator slit portion 52 with Y shape.
According to the foregoing description, because electrolytic capacitor Y shape is connected between each slit of commutator, so can be absorbed in the electric spark that the commutator slit portion of high voltage, big current work and starting continually, CD spindle drive motor out of service produces reliably, therefore can suppress to stop up caused short circuit because of the wearing and tearing of commutator, brush and the gap of commutator slit portion.
In sum, the present invention is by being connected in electrolytic capacitor △ shape or Y shape between each slit portion of commutator, can be absorbed in the electric spark that the commutator slit portion of the CD spindle drive motor out of service of Fraquent start under the high-voltage large current produces reliably, can obtain like this to suppress to stop up the disadvantages such as short circuit that cause, function admirable, the small-sized DC motor that the life-span is long, reliability is high because of commutator, wear of brush, commutator slit portion gap.
Claims (2)
1, a kind of CD main shaft small-sized DC motor, it is characterized in that having: have 2 utmost points (the N utmost point on the framework inside diameter circumferencial direction, the S utmost point) there is rotating shaft at magnetized exciting magnet and center, has 3 commutators that change magnetic pole and rotate with this variation magnetic pole that uniformly-spaced are provided with in a circumferential direction with respect to above-mentioned exciting magnet simultaneously, and also possessing has: the armature that the variation magnetic field is changed with described commutator makes up; Has a pair of (+utmost point with commutator connectivity structure on electric;-the utmost point) brush, terminal board combination are also fixed the carriage of this brush, terminal board combination and the bearing of support rotating shaft, and also have: Δ shape is connected between each slit of described commutator as the electrolytic capacitor that suppresses the protection component of electric spark between above-mentioned commutator slit.
2, motor according to claim 1 it is characterized in that, but described electrolytic capacitor Y shape is connected between each slit of described commutator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60868/94 | 1994-03-30 | ||
| JP6086894A JPH07274446A (en) | 1994-03-30 | 1994-03-30 | Small dc motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1111040A true CN1111040A (en) | 1995-11-01 |
| CN1050461C CN1050461C (en) | 2000-03-15 |
Family
ID=13154804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95100642A Expired - Fee Related CN1050461C (en) | 1994-03-30 | 1995-02-14 | DC small electric motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH07274446A (en) |
| CN (1) | CN1050461C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790504A (en) * | 2012-07-26 | 2012-11-21 | 深圳甲艾马达有限公司 | Spindle brush motor for blue-ray disc player |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SG90084A1 (en) * | 1999-01-06 | 2002-07-23 | Texas Instruments Inc | Method and apparatus for reconfiguring a motor in a disk drive |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2510549Y2 (en) * | 1991-12-17 | 1996-09-11 | マブチモーター株式会社 | Small motor |
-
1994
- 1994-03-30 JP JP6086894A patent/JPH07274446A/en active Pending
-
1995
- 1995-02-14 CN CN95100642A patent/CN1050461C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102790504A (en) * | 2012-07-26 | 2012-11-21 | 深圳甲艾马达有限公司 | Spindle brush motor for blue-ray disc player |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07274446A (en) | 1995-10-20 |
| CN1050461C (en) | 2000-03-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |