CN2566532Y - Brushless DC motor with double induction elements - Google Patents
Brushless DC motor with double induction elements Download PDFInfo
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- CN2566532Y CN2566532Y CN 02252031 CN02252031U CN2566532Y CN 2566532 Y CN2566532 Y CN 2566532Y CN 02252031 CN02252031 CN 02252031 CN 02252031 U CN02252031 U CN 02252031U CN 2566532 Y CN2566532 Y CN 2566532Y
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Abstract
The utility model relates to a brushless DC motor with double induction elements, which comprises a stator which is provided with a plurality of magnetic poles, a first induction element which is electrically connected with the driving element, a second induction element which is electrically connected with the driving element, a rotor which is connected with the stator in series in the axial direction, wherein, the stator comprises a driving element; a driving magnetic pole and a frequency-converting magnetic pole are arranged on the rotor; the rotor and the stator rotate in the mode of induction; the first induction element is used for testing the magnetic pole change of the passed driving magnetic pole so as to alternate the excitation of the magnetic pole; the second induction element is used for testing the magnetic pole change of the passed frequency-converting magnetic pole so as to output the running state of the rotor. The utility model uses the second induction element for replacing the conventional expensive frequency eliminating IC element; the second induction element is correspondingly arranged on the frequency-converting magnetic pole, and therefore, the cost is reduced; besides, the second induction element is used for testing the frequency-converting magnetic pole to make the utility model have the effect that rotation speed signals can be directly output.
Description
Technical field
The utility model relates to motor, the Brushless DC motor of the two sensing elements of especially a kind of tool, it utilizes two sensing elements to detect two groups of different magnetic poles of motor rotor respectively, so as the decision motor stator replace preset frequency specification (predetermined frequencyspecification) excitatory and the output motor rotary speed.
Background technology
General Brushless DC motor (fan) output motor rotary speed is as system reference, so that the increase or the minimizing of motor rotary speed are adjusted in decision.On the output motor rotary speed, general motor is often directly drawn the Hall voltage signal (Hall voltage signal) of hall sensing element as the reference rotation velocity frequency.On motors designs, because the restriction that the stator of Brushless DC motor has number of magnetic poles (pole count) is as four utmost points, the ends of the earth etc., motor rotor also must correspondence be provided with the number of magnetic poles of permanent magnet as four utmost points, the ends of the earth etc.When the hall sensing element was detected the permanent magnet of motor rotor, the speed-frequency that records this motor rotor must be decided by the number of magnetic poles of permanent magnet.
For the preset frequency specification of exporting motor rotary speed is applied to system, motor control circuit must be set up frequency elimination element (frequency divider) and handle speed-frequency, makes the motor of different magnetic poles number export the preset frequency specification that all can export motor rotary speed.
Commonly use Brushless DC motor, as shown in Figure 1, it is the circuit diagram of announcing No. 479902 " the improvement structure of Short Ultra-Thin Small Cooling Fan Motor " in the TaiWan, China patent gazette that on March 1st, 2002 was announced, this motor circuit mainly comprises one drive circuit 10, one sensing element 11, one coil 12 and a frequency elimination IC element 13, this motor structure as shown in Figure 2, it comprises a rotor 14, one stator seat 15 and a driving element 16, this rotor 14 is provided with a ring permanent magnet 141, it can be surrounded on the outer rim side of stator seat 15, this rotor 14 also is incorporated into stator seat 15 with central shaft 142, this stator seat 15 itself is wound with coil 12, and with a central siphon 151 connections one driving element 16, this driving element 16 is provided with drive circuit 10 and frequency elimination IC element 13 (figure does not illustrate), this driving element 16 is provided with a sensing element 11 in addition and is electrically connected at drive circuit 10, and this drive circuit 10 is alternately excitatory according to these sensing element 11 these coils 12 of detecting decision.13 of this frequency elimination IC elements are connected in this sensing element 11, are applied to system so that frequency elimination is handled the Hall voltage signal and exported the preset frequency specification.
Yet, having expensive problem owing to consider frequency elimination IC element, Brushless DC motor is set up frequency elimination IC element must increase cost.Be with, Brushless DC motor other low-cost elements need be set to substitute frequency elimination IC element.
In view of this, the utility model is the above-mentioned shortcoming of improvement, and it utilizes a lower-cost sensing element to substitute expensive frequency elimination IC element, and this sensing element correspondence is arranged at changes magnetic pole frequently.Though the utility model is set up a sensing element and changeed magnetic pole frequently, it still reduces a lot of than the cost that frequency elimination IC element is set.
Summary of the invention
The utility model main purpose provides the Brushless DC motor of the two sensing elements of a kind of tool, it utilizes a sensing element to substitute frequency elimination IC element, this sensing element correspondence is arranged at changes magnetic pole frequently, so can reduce frequency elimination IC element cost, makes to the utlity model has the effect that reduces cost.
The utility model secondary objective provides the Brushless DC motor of the two sensing elements of a kind of tool, it utilizes sensing element detecting to change magnetic pole frequently, the preset frequency specification that so can directly export motor rotary speed is applied to system, makes the effect that the utlity model has direct output speed signal.
According to the Brushless DC motor of the two sensing elements of tool of the present utility model, this motor mainly comprises a stator, and it is provided with a plurality of magnetic poles, and comprises a driving element; One first sensing element, it is electrically connected on this driving element; One second sensing element, it is electrically connected on this driving element; And a rotor, it axially is serially connected with this stator, is provided with one and drives a magnetic pole and a commentaries on classics frequency magnetic pole on this rotor; This rotor and this stator induction rotation, the pole change of this driving magnetic pole that this first sensing element detecting is passed through is so that replace excitatory this magnetic pole; And the pole change of this commentaries on classics frequency magnetic pole that this second sensing element detecting is passed through is so that export this rotor operational situation.
The utility model utilizes second sensing element to substitute and commonly uses frequency elimination IC element, and this second sensing element correspondence is arranged at this commentaries on classics magnetic pole frequently, so can reduce the cost of establishing frequency elimination IC element costliness, makes to the utlity model has the effect that reduces cost; In addition, the utility model also utilizes the detecting of second sensing element to change magnetic pole frequently, and the preset frequency specification that so can directly export motor rotary speed is applied to system, makes the effect that the utlity model has direct output speed signal.
Description of drawings
Fig. 1: the circuit diagram of the Brushless DC motor that No. the 479902nd, the TaiWan, China patent announcement;
Fig. 2: the exploded perspective view of the Brushless DC motor among Fig. 1;
Fig. 3: the exploded perspective view of the Brushless DC motor of the two sensing elements of the utility model first preferred embodiment tool;
Fig. 4: the combination of side view of the Brushless DC motor of the two sensing elements of the utility model first preferred embodiment tool;
Fig. 5: the expansion schematic diagram of the rotor magnetic ring of the utility model Brushless DC motor;
Fig. 6: the exploded perspective view of the Brushless DC motor of the two sensing elements of the utility model second preferred embodiment tool;
Fig. 7: the combination of side view of the Brushless DC motor of the two sensing elements of the utility model second preferred embodiment tool.
Embodiment
Fig. 3 discloses the exploded perspective view of the Brushless DC motor of the two sensing elements of the utility model first preferred embodiment tool.Fig. 4 discloses the combination of side view of the Brushless DC motor of the two sensing elements of the first preferred embodiment tool.Fig. 5 discloses the expansion schematic diagram of the rotor magnetic ring of the utility model Brushless DC motor.
Please refer to shown in Fig. 3,4, the Brushless DC motor of the two sensing elements of the utility model first preferred embodiment tool mainly comprises a stator 30, one first sensing element 40, one second sensing element 41 and a rotor 50.This stator 30 is this rotor 50 of serial connection combination axially, and this stator 30 is to belong to the radial windings type, and it comprises eight magnetic poles 31 and a driving element 32.This magnetic pole 31 axially is symmetrically distributed, and radially extends the periphery of this stator 30.
Shown in Fig. 3,4.This first sensing element 40 and second sensing element 41 can be the Hall IC element, and it is electrically connected on this driving element 32.Axially have difference in height on the position between this first sensing element 40 and second sensing element 41, and this first sensing element 40 and second sensing element 41 are respectively radially corresponding to this rotor 50.Wherein this first sensing element 40 can be vertical setting, and this second sensing element 41 can be and is horizontally disposed with.
Please refer to shown in Fig. 3,4,5, this rotor 50 is arranged and is surrounded with a driving magnetic pole 51 and a commentaries on classics frequency magnetic pole 52.This first sensing element 40 is in order to detect this driving magnetic pole 51 and to export induced voltage, so that correctly replace the magnetic pole 31 of excitatory this stator 30.Same, this second sensing element 41 is in order to detect this commentaries on classics magnetic pole 52 and output induction running voltage frequently, so that export these rotor 50 operational situations to system.
Referring again to shown in Figure 4, this number of magnetic poles that the drives magnetic pole 51 preferably quantity with the magnetic pole 31 of stator 30 is identical, drives this rotor 50 rotations so that both interact.This 52 of magnetic pole of commentaries on classics frequency has the quantity specifications (four) of predetermined polarity, and the quantity of this magnetic pole is suitably adjusted according to need.
Referring again to shown in Figure 3, when these rotor 50 relative these stators 30 rotate, the pole change of this drivings magnetic pole 51 that 40 detectings of this first sensing element are passed through is so that replace excitatory this magnetic pole 31, the pole change of this commentaries on classics frequency magnetic pole 52 that these second sensing element, 41 detectings are simultaneously passed through in case the operational situation of exporting this rotor 50 to system.
Fig. 6 discloses the exploded perspective view of the Brushless DC motor of the two sensing elements of the utility model second preferred embodiment tool.Fig. 7 discloses the combination of side view of the Brushless DC motor of the two sensing elements of the second preferred embodiment tool.
Please refer to shown in Fig. 6,7, it is the utility model second preferred embodiment, adopts the same reference numbers group to indicate when structure is same as first preferred embodiment, to be convenient to understand difference between the utility model two preferred embodiments.The part technology contents of second preferred embodiment has been disclosed in the first preferred embodiment description, incorporates reference in this, will not give unnecessary details in detail.
Shown in Fig. 6,7, the Brushless DC motor of the two sensing elements of the utility model second preferred embodiment tool mainly comprises a stator 30, one first sensing element 40, one second sensing element 41 and a rotor 50.This stator 30 is to belong to axial winding-type, and it comprises a superior pole piece 30a, an inferior pole piece 30b and a driving element 32.This superior pole piece 30a and inferior pole piece 30b are positioned at this stator 30 upper and lower sides, and common axially eight magnetic poles 31 of symmetry of forming.
Shown in Fig. 6,7, this first sensing element 40 and second sensing element 41 are electrically connected on this driving element 32.This rotor 50 is arranged and is surrounded with a driving magnetic pole 51 and a commentaries on classics frequency magnetic pole 52.This number of magnetic poles that the drives magnetic pole 51 preferably quantity with the magnetic pole 31 of stator 30 is identical.This 52 of magnetic pole of commentaries on classics frequency has the quantity specifications (four) of predetermined polarity.
Referring again to shown in Figure 7, when these rotor 50 relative these stators 30 rotate, the pole change of this drivings magnetic pole 51 that 40 detectings of this first sensing element are passed through makes motor rotor induction running so that replace excitatory this magnetic pole 31, the pole change of this commentaries on classics frequency magnetic pole 52 that these second sensing element, 41 detectings are simultaneously passed through in case the operational situation of exporting this rotor 50 to system.
Shown in Fig. 1,2,3,6, commonly use motor circuit and need set up frequency elimination IC element 13, thereby increase cost.Review, the utility model utilizes second sensing element 41 to substitute and commonly uses frequency elimination IC element 13, these second sensing element, 41 correspondences are arranged at this commentaries on classics magnetic pole 52 frequently, so can reduce the cost of establishing frequency elimination IC element 13 costlinesses, make to the utlity model has the effect that reduces cost.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those who are familiar with this art; in the spirit and scope that do not break away from the utility model; when can doing a little change and retouching, so the protection range of the utility model is as the criterion when looking claims scope person of defining.
Claims (6)
1, the Brushless DC motor of the two sensing elements of a kind of tool, it is characterized in that: it comprises:
One stator, it is provided with a plurality of magnetic poles, and comprises a driving element;
One first sensing element, it is electrically connected on this driving element;
One second sensing element, it is electrically connected on this driving element; And
One rotor, it axially is serially connected with this stator, is provided with one and drives a magnetic pole and a commentaries on classics frequency magnetic pole on this rotor;
This rotor and this stator induction rotation, the pole change of this driving magnetic pole that this first sensing element detecting is passed through is so that replace excitatory this magnetic pole; And the pole change of this commentaries on classics frequency magnetic pole that this second sensing element detecting is passed through is so that export this rotor operational situation.
2, the Brushless DC motor of the two sensing elements of tool as claimed in claim 1, it is characterized in that: this stator is the radial windings type.
3, the Brushless DC motor of the two sensing elements of tool as claimed in claim 1, it is characterized in that: this stator is axial winding-type, and it comprises a superior pole piece and an inferior pole piece, and this superior pole piece and inferior pole piece are formed the magnetic pole of this stator jointly.
4, the Brushless DC motor of the two sensing elements of tool as claimed in claim 1 is characterized in that: this first sensing element is provided with for vertical.
5, the Brushless DC motor of the two sensing elements of tool as claimed in claim 1, it is characterized in that: this second sensing element is for being horizontally disposed with.
6, the Brushless DC motor of the two sensing elements of tool as claimed in claim 1 is characterized in that: this driving magnetic pole and this commentaries on classics frequency magnetic pole are put in this rotor Arranged rings winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252031 CN2566532Y (en) | 2002-08-29 | 2002-08-29 | Brushless DC motor with double induction elements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252031 CN2566532Y (en) | 2002-08-29 | 2002-08-29 | Brushless DC motor with double induction elements |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2566532Y true CN2566532Y (en) | 2003-08-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02252031 Expired - Lifetime CN2566532Y (en) | 2002-08-29 | 2002-08-29 | Brushless DC motor with double induction elements |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2566532Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386740A (en) * | 2010-08-30 | 2012-03-21 | 建准电机工业股份有限公司 | Double-steering brushless direct current motor |
| CN109546833A (en) * | 2018-11-06 | 2019-03-29 | 汤秉辉 | DC Brushless Motor |
-
2002
- 2002-08-29 CN CN 02252031 patent/CN2566532Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386740A (en) * | 2010-08-30 | 2012-03-21 | 建准电机工业股份有限公司 | Double-steering brushless direct current motor |
| CN109546833A (en) * | 2018-11-06 | 2019-03-29 | 汤秉辉 | DC Brushless Motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120829 Granted publication date: 20030813 |