CN1815871A - DC brush-less motor driving device without hull assembly - Google Patents
DC brush-less motor driving device without hull assembly Download PDFInfo
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- CN1815871A CN1815871A CNA2005100050622A CN200510005062A CN1815871A CN 1815871 A CN1815871 A CN 1815871A CN A2005100050622 A CNA2005100050622 A CN A2005100050622A CN 200510005062 A CN200510005062 A CN 200510005062A CN 1815871 A CN1815871 A CN 1815871A
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Abstract
The drive unit includes a drive circuit, a power cut and automatic recovery circuit, and a DC electrical level comparator. The drive circuit is in use for driving rotation of a rotor. When rotor is stuck and in still, the power cut and automatic recovery circuit through DC electrical level comparator senses the condition of the rotor, and cuts power of the drive circuit off correspondingly. When fault is removed, the power cut and automatic recovery circuit triggers the drive circuit to recovery normal operation of rotor. The invention prevents drive module and winding in drive circuit from overheat, even burning caused by abnormal current.
Description
Technical field
The present invention system is about a kind of DC Brushless Motor drive unit that does not have Hall subassembly, particularly about a kind of DC Brushless Motor drive unit with no Hall subassembly of outage and auto restore facility.
Background technology
In many electronic products, can not burn for fear of total system because temperature is too high, can in system, install a radiator fan additional usually and be protected, when system temperature was too high, fan promptly can activate to reduce the total system temperature, reaches the heat radiation purpose.
Fan mainly is to utilize motor to drive to make its running.Generally speaking, DC Brushless Motor (brushless DC motor, BLDC) because good maintenance, controlled good, performance and efficient excellence become the favorite of industrial quarters, the motor of wherein low power application such as Winchester disk drive and CD driver already, the motor apparatus of powerful application such as electric motor car can utilize DC Brushless Motor to obtain the characteristic of high efficiency, stabilization of speed, high torsion, durable, easy maintenance.
Please refer to the 1st figure, it illustrates the circuit diagram of the DC Brushless Motor drive circuit that is existing no Hall subassembly.Existing a kind of drive circuit 100 that does not adopt the DC Brushless Motor of Hall subassembly (hall sensor) comprise one first coil windings L1, one second coil windings L2, a capacitor C1, transistor Q1, Q2, Q3, Ji receive diode (Zener Diode) ZD1, ZD2, ZD3, with resistance R 1, R2, R3.The first coil windings L1 for example is an ancillary coil, and the second coil windings L2 is a powered coil, and the switch start that both can be produced by drive circuit reaches and alternately changes the sense of current, and excitatory CD-ROM drive motor rotor rotation.
First state
When a fixed voltage source is imported an electric current, in the moment of energising, in the two ends of the first coil windings L1, contact a is the High current potential, and contact b is the low current potential relatively, so the base stage of transistor Q2 is the Low current potential, transistor Q2 ends, and the first coil windings L1 no current passes through.
The base stage of transistor Q3 is the High current potential, transistor Q3 conducting.When transistor Q3 conducting, electric current is from the second coil windings L2 ground connection behind the transistor Q3 of flowing through, so the second coil windings L2 generation effect, the control stator produces induced field, rotates a special angle to drive rotor, for example is to be rotated counterclockwise 90 degree.
Second state
After rotor rotates a special angle, the first coil windings L1 can sense generating state and produce dislike induction signal (for example being reversal voltage), make that contact a is the low current potential, and contact b is the High current potential relatively, it is the High current potential that positive voltage makes the base stage of transistor Q2, then transistor Q2 conducting.When transistor Q2 conducting, electric current by flow through resistance R 2 and transistor Q2 after ground connection, so the base stage of transistor Q3 is the low current potential, transistor Q3 ends, then the second coil windings L2 no current passes through.At this moment, the induced field of stator disappears thereupon, and rotor continues to turn in the same direction.Then, return first state, thereafter, just continue between first state and second state, to turn round.
Yet,, for example be small stone or shaft in case fan meets with foreign body intrusion, rotor is blocked by foreign matter, and then rotor moment becomes from the state of running and do not rotate, under the state that not have to cut in magnetic field, the first coil windings L1 does not act on, and transistor Q2 ends, and the first coil windings L1 no current passes through.But because the action that the DC Brushless Motor drive circuit of existing no Hall subassembly can't cut off the power supply accordingly, under the situation that power supply is constantly supplied with, transistor Q3 continues conducting, cause electric current constantly by the second coil windings L2 ground connection behind the transistor Q3 of flowing through, cause the second coil windings L2 constantly to generate heat, even produce danger on fire.
Moreover in case after foreign matter removed, existing circuit also can't make rotor recover running automatically, after power supply must being closed fully, again Brushless DC motor is coupled to power supply, the beginning can be continued normal operation, causes the user inconvenient greatly.
Summary of the invention
Therefore; for addressing the above problem; the present invention proposes a kind of DC Brushless Motor drive unit that does not have Hall subassembly, has outage and auto restore facility, in case when fan is blocked by foreign body intrusion; can cut off the power supply automatically with the protection fan; avoid on fire, and after foreign matter removes, the action of opening again again after not needing power supply closed fully; can trigger automatically, CD-ROM drive motor runs well once more.
According to purpose of the present invention, a kind of DC Brushless Motor drive unit is proposed, comprise one drive circuit, an outage and an automatic restoring circuit, and a direct current level comparison circuit.Drive circuit is in order to driving a rotor rotation, and when rotor is stuck when not changeing, outage sees through the DC level comparison circuit with automatic restoring circuit system and predicts immediately, and makes the drive circuit outage accordingly.
Drive circuit comprises one first coil windings, one second coil windings, a first transistor, transistor seconds, and first coil windings is an ancillary coil, and second coil windings is a powered coil.When drive circuit is switched on, transistor seconds by the time, the first coil windings no current passes through, the first transistor conducting, electric current is from second coil windings ground connection behind the first transistor of flowing through, so produce induced field, the driving rotor rotates a special angle; Wherein after the rotor rotation, first coil windings produces induction and makes the transistor seconds conducting, and the first transistor ends, and then the second coil windings no current passes through; First coil windings and second coil windings system are subjected to the switch start of drive circuit and alternately change the sense of current, and excitatory driving rotor rotation.
Outage more comprises a drive integrated circult with automatic restoring circuit, outage and automatic restoring circuit and DC level comparison circuit electrically connect, after lying in the drive integrated circult relatively by the signal of DC level comparison circuit output, whether make outage and automatic restoring circuit effect with decision by the drive integrated circult output signal.When the rotor normal rotation, outage does not act on automatic restoring circuit; When rotor is stuck when not changeing, outage sees through the DC level comparison circuit with automatic restoring circuit system and predicts immediately, and makes the drive circuit outage accordingly.
Outage comprises one the 3rd transistor with automatic restoring circuit, and wherein when the 3rd transistor ended, outage did not act on drive circuit driven rotor rotation with automatic restoring circuit.When the 3rd transistor turns, the first transistor ends, and the second coil windings no current is passed through, and outage makes the drive circuit outage with automatic restoring circuit.
Outage more comprises a capacitor with automatic restoring circuit, and after the drive circuit outage, capacitor system provides a voltage turn-on the 4th transistor, and the 3rd transistor is ended, so that drive circuit can the driven rotor rotation.
According to a further object of the present invention, reintroduce a kind of DC Brushless Motor drive unit that does not have Hall subassembly, comprise a drive unit, an outage and an automatic restoring circuit, and a direct current level comparison circuit.Drive unit is in order to driving a rotor rotation, and when rotor is stuck when not changeing, outage sees through the DC level comparison circuit with automatic restoring circuit system and predicts immediately, and makes the drive unit outage accordingly.
For above and other objects of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Description of drawings
The 1st figure illustrates the circuit diagram of the DC Brushless Motor drive circuit that is existing no Hall subassembly.
It is framework calcspar according to the DC Brushless Motor drive unit of the no Hall subassembly of preferred embodiment of the present invention that 2A figure illustrates.
It is two schematic diagrames according to the DC Brushless Motor drive unit of the no Hall subassembly of preferred embodiment of the present invention that 2B figure and 2C figure illustrate.
It is circuit diagram according to the DC Brushless Motor drive unit of the no Hall subassembly of preferred embodiment of the present invention that the 3rd figure illustrates.
[primary clustering symbol description]
100,110,120: the DC Brushless Motor drive circuit
200: the DC Brushless Motor drive unit
210: outage and automatic restoring circuit
211: drive integrated circult
220: the DC level comparison circuit
230: drive circuit
Embodiment
Please refer to 2A figure, it illustrates is framework calcspar according to the DC Brushless Motor drive unit of the no Hall subassembly of preferred embodiment of the present invention.Shown in 2A figure, include an outage and automatic restoring circuit (currentshutdown and auto-restart circuit) 210 and one direct current level comparison circuit 220 in the DC Brushless Motor drive unit 200 of the present invention.Outage electrically connects with automatic restoring circuit 210 and DC Brushless Motor drive unit 200, under normal condition, DC Brushless Motor drive unit 200 excitatory CD-ROM drive motor rotor rotation, in a single day meet with foreign body intrusion and work as rotor, when rotor is blocked by foreign matter, outage sees through DC level comparison circuit 220 with automatic restoring circuit 210 can learn this emergency situations immediately, and accordingly output signal to DC Brushless Motor drive unit 200 and make its outage.Thus, can avoid the phenomenon that the driving component of DC Brushless Motor drive unit 200 and coil are overheated because of abnormal current causes even burn.After fault was got rid of, outage can trigger DC Brushless Motor drive unit 200 with automatic restoring circuit 210, made motor rotor recover to run well.
Please refer to 2B figure and 2C figure, it illustrates is two schematic diagrames according to the DC Brushless Motor drive unit of the no Hall subassembly of preferred embodiment of the present invention.Shown in 2B figure, DC Brushless Motor drive unit 200 of the present invention mainly includes one drive circuit 110, an outage and an automatic restoring circuit 210 and a direct current level comparison circuit 220.Drive circuit 110 can for example be existing drive circuit, and main system produces the switch start with two groups of coil windings, with the rotor rotation of excitatory CD-ROM drive motor.And except drive circuit 110, gone up outage and automatic restoring circuit 210 and a direct current level comparison circuit 220 more, with the DC Brushless Motor drive unit 200 of common composition one tool outage with the no Hall subassembly of auto restore facility.Outage is to utilize contact C and drive circuit 110 to electrically connect with automatic restoring circuit 210, and then controls the energising and the off-position of whole DC Brushless Motor drive unit 200.
Yet the DC Brushless Motor drive unit 200 of the no Hall subassembly of this preferred embodiment does not limit and must adopt existing drive circuit 110 fully.Perhaps, transistor Q1 in the drive circuit 110 and Ji are received diode ZD1, ZD2, also can use single diode D1 to replace, to reach the effect of keeping a fixed-bias transistor circuit, the drive circuit 120 shown in 2C figure.Moreover dividing potential drop of being desired for the coincident circuit designer and the situation of avoiding taking place overcurrent also can add resistance R 1, R2, R3 to reach the effect of dividing potential drop in drive circuit 110,120.In addition, the number of capacitor C1 also can be by reaching after a plurality of capacitor parallel connections, be convenient to be adjusted to the user and desire to reach capacitance, but not only limit to use capacitor just can reach user's requirement, increased the elasticity of design with specific capacitance values.
Below will do further exposure to the DC Brushless Motor drive unit of no Hall subassembly of the present invention according to disclosed spirit of the present invention among the 2A figure.Please refer to the 3rd figure, it illustrates is circuit diagram according to the DC Brushless Motor drive unit of the no Hall subassembly of preferred embodiment of the present invention.The drive unit 200 of the DC Brushless Motor of no Hall subassembly comprises one drive circuit 230, an outage and automatic restoring circuit 210, a direct current level comparison circuit 220.Drive circuit 230 comprise one first coil windings L1, one second coil windings L2, capacitor C1, C3, transistor Q1, Q2, diode D1, Ji receive diode (Zener Diode) ZD1, with resistance R 1, R2.Under the normal operation situation, the first coil windings L1 for example is an ancillary coil, and the second coil windings L2 is a powered coil, and the switch start that both can be produced by drive circuit 230 reaches and alternately changes the sense of current, and excitatory CD-ROM drive motor rotor rotation.
Outage mainly comprises a drive integrated circult (driveintegrated circuit, drive IC) 211, diode D2, D3, transistor Q3, Q4 with automatic restoring circuit 210, and capacitor C2.DC level comparison circuit 220 mainly comprises resistance R 1, R2, R3, R4, contact d between R3, R4 is a fixed voltage value, and the contact e between R1, R2, then the switch start that produces because of drive unit 200 and the sense of current that alternately changes change its magnitude of voltage.
Outage utilizes contact c to come to electrically connect with whole drive circuit 230 with automatic restoring circuit 210 main systems, and utilize by the 2nd stitch in the drive integrated circult 211 and the 4th stitch, compared in the magnitude of voltage input drive integrated circult 211 with contact d and contact e place respectively, and be greater than or less than the fixed voltage value at contact d place according to the magnitude of voltage at contact e place, and respectively accordingly by the 8th stitch or the 7th stitch output square-wave signal to diode D2, D3.
At this, what need pay special attention to is, is linked to diode D2, D3 and resistance 12 between drive integrated circult 211 and the transistor Q4, can also not use, or replace with other assembly, look closely the required and increase and decrease of employed drive integrated circult model and user or adjust.
When rotor ran well, contact d place and contact e place had a pressure reduction and exist, and make the 8th stitch or the 7th stitch alternately export square-wave signal.Because the switching signal complementation that the 8th stitch or the 7th stitch are exported makes the base stage of transistor Q4 be continuously the High potential state, then transistor Q4 conducting.When transistor Q4 conducting, electric current by flow through resistance R 7 and transistor Q4 after ground connection, so the base stage of transistor Q3 is the low current potential, transistor Q3 ends, then can be regarded as whole outage and automatic restoring circuit 210 no effects, the switch start that the first coil windings L1 and the second coil windings L2 are produced by drive unit reaches and alternately changes the sense of current, continues excitatory CD-ROM drive motor rotor rotation.
First state
When a fixed voltage source is imported an electric current, in the moment of energising, in the two ends of the first coil windings L1, contact a is the High current potential, and contact b is the low current potential relatively, so the base stage of transistor Q2 is the Low current potential, transistor Q2 ends, and the first coil windings L1 no current passes through.
The base stage of transistor Q1 is the High current potential, transistor Q1 conducting.When transistor Q1 conducting, electric current is from the second coil windings L2 ground connection behind the transistor Q1 of flowing through, so the second coil windings L2 generation effect, the control stator produces induced field, rotates a special angle to drive rotor, for example is to be rotated counterclockwise 90 degree.
Second state
After rotor rotates a special angle, the first coil windings L1 can sense generating state and produce dislike induction signal (for example being reversal voltage), make that contact a is the low current potential, and contact b is the High current potential relatively, it is the High current potential that positive voltage makes the base stage of transistor Q2, then transistor Q2 conducting.When transistor Q2 conducting, electric current by flow through resistance R 2 and transistor Q2 after ground connection, so the base stage of transistor Q1 is the low current potential, transistor Q1 ends, then the second coil windings L2 no current passes through.At this moment, the induced field of stator disappears thereupon, and rotor continues to turn in the same direction.Then, return first state, thereafter, just continue between first state and second state, to turn round.
In case fan meets with foreign body intrusion, for example be small stone or shaft, rotor is blocked by foreign matter, then rotor moment becomes from the state of running and does not rotate, do not have in magnetic field under the state of cutting, contact e between R1, R2 does not then have the alternate of the sense of current, so the 8th stitch of drive integrated circult 211 or the 7th stitch are not just exported square-wave signal to diode D2, D3.At this moment, the base stage of transistor Q4 is continuously the low potential state, and transistor Q4 ends, and the base stage of transistor Q3 is the High current potential, then transistor Q3 conducting, electric current by the resistance R 7 of flowing through, R9 and transistor Q3 after ground connection.This moment, the base stage of transistor Q1 was the low current potential, and transistor Q1 ends, so the second coil windings L2 no current passes through, the second coil windings L2 does not generate electricity.That is to say, when rotor is blocked by foreign matter, outage sees through DC level comparison circuit 220 with automatic restoring circuit 210 can learn this emergency situations immediately, and drive circuit 230 is cut off the power supply, can guarantee that the second coil windings L2 can constantly not generate heat, and avoids on fire under the electric current sustainable supply.
Drive integrated circult 211 utilizes the auto charge and discharge of capacitor C 2, and make the 8th stitch or the 7th stitch produce a high voltage at set intervals, and then trial turn-on transistor Q4, if this moment, foreign matter removed, then transistor Q3 ends, transistor Q1 conducting makes drive circuit 230 recover normal operation.If foreign matter do not remove yet, then 211 of drive integrated circults carry out this trigger action every a set time.Thus; outage and automatic restoring circuit 210 are except can be when rotor is blocked by foreign body intrusion; can cut off the power supply automatically with the driving component and the coil of protection drive unit; avoid on fire; and after foreign matter removes, can trigger the normal operation once more that makes with CD-ROM drive motor automatically, compare with existing; the action of opening again again after the disclosed DC Brushless Motor drive unit 200 of preferred embodiment of the present invention does not need power supply closed fully, very convenient for the user.
The DC Brushless Motor drive unit of the above-mentioned no Hall subassembly that proposes, have outage and auto restore facility, right the present invention is defined in this, for example, except using above-mentioned transistor Q1, Q2, Q3, Q4 as the switch start, (complementarymetal-oxide semiconductor CMOS) substitutes can also to use complementary metal oxide semiconductor, and the number of employed resistance and electric capacity does not also limit, and can do to add and minimizing with the user is required.Moreover, can learn the operating state of the DC Brushless Motor drive unit of whole no Hall subassembly for the convenience of the users immediately, can add an output contact (O/P), it for example is the 3rd pin place that is electrically connected at drive integrated circult 211, see through this output contact again and can be external to a display screen, directly operating state is shown on the screen.In addition, the use of drive integrated circult also is not limited to certain specific model, and contact also is not limited to and must alternately exports square-wave signal by the 8th above-mentioned stitch or the 7th stitch, all is applicable to the present invention as long as can reach the drive integrated circult of any model of merit able one of the present invention.
Though the present invention discloses as above with a preferred embodiment; right its is not in order to limit the present invention; anyly have the knack of this operator; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (20)
1. DC Brushless Motor drive unit, in order to drive a rotor rotation, this DC Brushless Motor drive unit comprises:
One drive circuit is in order to drive this rotor rotation;
One outage and automatic restoring circuit; And
One direct current level comparison circuit;
Wherein, when this rotor is stuck when not changeing, this outage and automatic restoring circuit system see through this DC level comparison circuit and predict immediately, and make this drive circuit outage accordingly.
2. DC Brushless Motor drive unit as claimed in claim 1, wherein when this rotor normal rotation, this outage and automatic restoring circuit do not act on; When this rotor is stuck when not changeing, this outage and automatic restoring circuit system see through this DC level comparison circuit and predict immediately, and make this drive circuit outage accordingly.
3. DC Brushless Motor drive unit as claimed in claim 1, this drive circuit comprises one first coil windings, one second coil windings, a first transistor, a transistor seconds, wherein when this drive circuit energising, when this transistor seconds ends, this first coil windings no current passes through, this first transistor conducting, and electric current is from this second coil windings ground connection behind this first transistor of flowing through, so produce induced field, drive this rotor and rotate a special angle; After this rotor rotation, this first coil windings produces induction and makes this transistor seconds conducting, and this first transistor ends, and then the second coil windings no current passes through; This first coil windings and this second coil windings system are subjected to the switch start of this drive circuit and alternately change the sense of current, and this rotor rotation of excitatory driving.
4. DC Brushless Motor drive unit as claimed in claim 3, wherein this first coil windings and this second coil windings system is wound in this rotor, in order to this rotor rotation of excitatory driving.
5. DC Brushless Motor drive unit as claimed in claim 3, wherein this first coil windings is an ancillary coil, and this second coil windings is a powered coil.
6. DC Brushless Motor drive unit as claimed in claim 3, wherein this outage and automatic restoring circuit comprise one the 3rd transistor;
Wherein, when the 3rd transistor ended, this outage and automatic restoring circuit did not act on, this this rotor rotation of drive circuit driven;
Wherein, when the 3rd transistor turns, this first transistor ends, and this second coil windings no current is passed through, and this outage and automatic restoring circuit make this drive circuit outage.
7. DC Brushless Motor drive unit as claimed in claim 6, wherein this outage and automatic restoring circuit more comprise one the 4th transistor, utilize this drive integrated circult output signal whether to determine the 4th transistorized conducting; When the 4th transistor by the time, the 3rd transistor turns then, this outage and automatic restoring circuit cut off the power supply this drive circuit; When the 4th transistor turns, then the 3rd transistor ends, and this outage and automatic restoring circuit do not act on.
8. DC Brushless Motor drive unit as claimed in claim 7, wherein this outage and automatic restoring circuit more comprise a capacitor, after this drive circuit outage, this capacitor system provides a voltage turn-on the 4th transistor, and the 3rd transistor is ended, so that this drive circuit drives this rotor rotation once more.
9. DC Brushless Motor drive unit as claimed in claim 7, wherein this outage and automatic restoring circuit more comprise at least one diode, be electrically connected between this drive integrated circult and the 4th transistor, but the signal of this drive integrated circult output of modulation.
10. DC Brushless Motor drive unit as claimed in claim 1, this drive circuit comprises one first coil windings, one second coil windings, one first complementary metal oxide semiconductor, one second complementary metal oxide semiconductor, wherein when this drive circuit energising, when this second complementary metal oxide semiconductor ends, this first coil windings no current passes through, this first complementary metal oxide semiconductor conducting, electric current is from this second coil windings ground connection behind this first complementary metal oxide semiconductor of flowing through, so produce induced field, drive this rotor and rotate a special angle; After this rotor rotation, this first coil windings produces induction and makes this second complementary metal oxide semiconductor conducting, and this first complementary metal oxide semiconductor ends, and then the second coil windings no current passes through; This first coil windings and this second coil windings system are subjected to the switch start of this drive circuit and alternately change the sense of current, and this rotor rotation of excitatory driving.
11. DC Brushless Motor drive unit as claimed in claim 10, wherein this first coil windings and this second coil windings system is wound in this rotor, in order to this rotor rotation of excitatory driving.
12. DC Brushless Motor drive unit as claimed in claim 10, wherein this first coil windings is an ancillary coil, and this second coil windings is a powered coil.
13. DC Brushless Motor drive unit as claimed in claim 10, wherein this outage and automatic restoring circuit comprise one the 3rd complementary metal oxide semiconductor;
Wherein, when the 3rd complementary metal oxide semiconductor ended, this outage and automatic restoring circuit did not act on, this this rotor rotation of drive circuit driven;
Wherein, when the 3rd complementary metal oxide semiconductor conducting, this first complementary metal oxide semiconductor ends, and this second coil windings no current is passed through, and this outage and automatic restoring circuit make this drive circuit outage.
14. DC Brushless Motor drive unit as claimed in claim 13, wherein this outage and automatic restoring circuit more comprise one the 4th complementary metal oxide semiconductor, utilize conducting that this drive integrated circult output signal determines the 4th complementary metal oxide semiconductor whether; When the 4th complementary metal oxide semiconductor ends, then the 3rd complementary metal oxide semiconductor conducting, this outage and automatic restoring circuit make this drive circuit outage; When the 4th complementary metal oxide semiconductor conducting, then the 3rd complementary metal oxide semiconductor ends, and this outage and automatic restoring circuit do not act on.
15. DC Brushless Motor drive unit as claimed in claim 14, wherein this outage and automatic restoring circuit more comprise a capacitor, after this drive circuit outage, this capacitor system provides a voltage turn-on the 4th complementary metal oxide semiconductor, and the 3rd complementary metal oxide semiconductor is ended, so that this drive circuit drives this rotor rotation once more.
16. DC Brushless Motor drive unit as claimed in claim 14, wherein this outage and automatic restoring circuit more comprise at least one diode, be electrically connected between this drive integrated circult and the 4th complementary metal oxide semiconductor, but the signal of this drive integrated circult output of modulation.
17. DC Brushless Motor drive unit as claimed in claim 1, wherein this outage and automatic restoring circuit more comprise a drive integrated circult, this outage and automatic restoring circuit and this DC level comparison circuit electrically connect, after two magnitudes of voltage that obtained by this DC level comparison circuit lie in this drive integrated circult relatively, by this drive integrated circult output signal to determine whether this outage and automatic restoring circuit act on.
18. DC Brushless Motor drive unit as claimed in claim 17, more comprise an output contact (O/P), system electrically connects with this drive integrated circult, seeing through this output contact can an external display screen, directly is shown on this display screen in order to the operating state with this DC Brushless Motor drive unit.
19. DC Brushless Motor drive unit as claimed in claim 17, wherein this DC level comparison circuit comprises that one first resistance, one second resistance, one the 3rd resistance and one the 4th resistance, this two magnitudes of voltage system derive from respectively and are positioned between this first resistance and this second resistance, and be positioned between the 3rd resistance and the 4th resistance.
20. DC Brushless Motor drive unit as claimed in claim 19, wherein be positioned at this magnitude of voltage system between this first resistance and this second resistance and influenced by this first coil windings and change, being positioned at the 3rd resistance then relative with this magnitude of voltage between the 4th resistance is a fixed value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100050622A CN100454750C (en) | 2005-01-31 | 2005-01-31 | DC brush-less motor driving device without hull assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100050622A CN100454750C (en) | 2005-01-31 | 2005-01-31 | DC brush-less motor driving device without hull assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1815871A true CN1815871A (en) | 2006-08-09 |
| CN100454750C CN100454750C (en) | 2009-01-21 |
Family
ID=36907898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100050622A Expired - Fee Related CN100454750C (en) | 2005-01-31 | 2005-01-31 | DC brush-less motor driving device without hull assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100454750C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480121A (en) * | 2010-11-26 | 2012-05-30 | 中国北方车辆研究所 | Load overcurrent protection method based on self-recovery function |
| CN102616129A (en) * | 2012-03-21 | 2012-08-01 | 寸晓鱼 | Motor system for Halless electric vehicle without magnetic steel |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3243028B2 (en) * | 1993-01-19 | 2002-01-07 | 株式会社東芝 | Control device for brushless motor and brushless motor |
| CN1034618C (en) * | 1994-03-31 | 1997-04-16 | 黄旭珠 | Full-function protector for electric machine |
| TW328190B (en) * | 1994-06-14 | 1998-03-11 | Toshiba Co Ltd | Control device of brushless motor and method of fault detection and air conditioner |
| CN1154007A (en) * | 1995-12-06 | 1997-07-09 | 田京涛 | Triphase AC motor protector |
| JP2000324875A (en) * | 1999-05-12 | 2000-11-24 | Meidensha Corp | Inverter |
-
2005
- 2005-01-31 CN CNB2005100050622A patent/CN100454750C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480121A (en) * | 2010-11-26 | 2012-05-30 | 中国北方车辆研究所 | Load overcurrent protection method based on self-recovery function |
| CN102480121B (en) * | 2010-11-26 | 2016-03-30 | 中国北方车辆研究所 | A kind of load overcurrent guard method based on self-recovering function |
| CN102616129A (en) * | 2012-03-21 | 2012-08-01 | 寸晓鱼 | Motor system for Halless electric vehicle without magnetic steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100454750C (en) | 2009-01-21 |
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