CN2917088Y - AC fan motor drive circuit with current waveform detection function - Google Patents
AC fan motor drive circuit with current waveform detection function Download PDFInfo
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- CN2917088Y CN2917088Y CNU2006200007726U CN200620000772U CN2917088Y CN 2917088 Y CN2917088 Y CN 2917088Y CN U2006200007726 U CNU2006200007726 U CN U2006200007726U CN 200620000772 U CN200620000772 U CN 200620000772U CN 2917088 Y CN2917088 Y CN 2917088Y
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- fan motor
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- drive circuit
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Abstract
The utility model relates to an AC fan motor drive circuit with current waveform detecting function, which comprises an AC-DC converting unit, a motor current waveform detecting unit, a voltage reducing unit, a fan motor drive unit with a Hall sensor module, a fan motor coil unit and a harmonic removing unit. The AC power source is converted into high-voltage DC power source and then current value of the fan motor through the voltage reduction of the fan motor current waveform detecting unit. The value can be output. Operating state of the fan motor can be judged by observing the corresponding waveform variation of the motor current value and motor current switching time, thus providing a circuit to quickly detect operating state of the AC fan motor and improving fan stability.
Description
Technical field
The utility model is a kind of ac fan motor drive circuit with current waveform measuring ability, especially finger is a kind of comes fan motor via the input high-voltage DC power supply, but and fast detecting fan motor running normal drive circuit whether, in order to improve the stability of fan quality.
Background technology
The applicant had before proposed a kind of novel application case of patent of ac fan motor drive circuit, see also shown in Figure 4, be for preceding taking off the circuit block diagram of novel application case, this drive circuit consists predominantly of an AC-DC conversion unit 20, one low pressure voltage regulation unit 21, one motor drive unit 22, an one motor coil unit 23 and a harmonic wave are eliminated unit 24, above-mentioned drive circuit is by after by AC-DC conversion unit 20 alternating voltage being converted to high-voltage DC power supply, again high-voltage DC power supply is directly provided and give motor coil unit 23 and low pressure voltage regulation unit 21, this low pressure voltage regulation unit 21 is after high-voltage DC power supply is converted to stable low-voltage dc power supply, in order to supply above-mentioned motor drive unit 22.
Please cooperate consult shown in Figure 5, above-mentioned motor drive unit 22 mainly has the drive IC of low voltage operating power supply characteristic by one, one Hall perception component and two transistor constitute, this alternating current motor operation principle is to give this drive IC via this Hall perception component output commutation perceptual signal, give this high number of turn motor coil by the mutual output voltage of this drive IC via the two transistor Control current, make it produce mutual electric current and drive alternating current motor and turn round, again, because of this motor coil unit 23 is provided is a high-voltage DC power supply, this motor coil unit 23 is a high electric current so flow through, thereby can increase impedance via the number of turn of the high number of turn coil that increases these 23 inside, motor coil unit, electric current during with the reduction conducting reaches and improves fan motor rotating speed and less electricity consumption.
Can learn in the above description, Hall perception component in this motor drive unit 22 is for driving the primary clustering of alternating current motor running, yet, can't learn also in the one drive circuit thus whether this Hall perception component action is normal, so that whether the rear end drive circuit works state that can't effectively judge and detect in this one drive circuit is stable in the drive circuit operation process.
In addition, in above-mentioned this low pressure voltage regulation unit 21, mainly see through two resistance and be connected to this AC-DC conversion unit 20 by a zener diode, but the voltage of being exported because of this AC-DC conversion unit 20 is high-voltage DC power supply, be converted in the process of stabilizing low voltage DC power supply at this high-voltage DC power supply, can form excessive drop in the two ends of two resistance, cause resistor assembly overheated, and shorten its useful life, what is more, because of improper use can cause the drive circuit instability, reduce the reliability of its drive circuit.
As shown in the above description, improve fan motor and less electricity consumption, still have room for improvement though the previous ac motor driving circuit that proposes of applicant can reach.
The utility model content
For this reason, main purpose of the present utility model provides a kind of ac fan motor drive circuit with current waveform measuring ability, via the drive circuit of fast detecting fan motor operating state, judge whether the fan motor operating state is normal, by stability with raising fan quality.
Taking off the employed major technique means of purpose before desiring to reach is to make this ac fan motor drive circuit with current waveform measuring ability include:
One AC-DC conversion unit is to be a current rectifying and wave filtering circuit, and its input is to be connected to AC power, exports after AC power is converted to high-voltage DC power supply;
One pressure unit is to include at least six resistor in series to form, and is exported after high-voltage DC power supply is converted to a low-voltage dc power supply;
One fan motor driver element is the output that connects this pressure unit, consists predominantly of drive IC, a Hall perception component and a two transistor of a LVPS characteristic;
One fan motor coil unit, mainly formed by two-supremes number of turn coil, one end of each high number of turn coil is the output that connects this motor current waveforms detection unit, and the other end of two-supremes number of turn coil then is connected to the transistor of this fan motor driver element correspondence respectively;
One harmonic wave is eliminated the unit, is the output that an end connects this motor current waveforms detection unit, and the other end connects the transistor of this fan motor driver element, and in parallel with this fan motor coil unit; And
One motor current waveforms detection unit, be to be serially connected with between the output and this fan motor coil unit of this AC-DC conversion unit, when this AC-DC conversion unit output exports high-voltage DC power supply to this fan motor coil unit, one high-voltage DC power supply electric current this motor current waveforms detection unit of can flowing through, this moment, this motor current waveforms detection unit can produce corresponding voltage drop along with the size of high-voltage DC power supply current loading;
Above-mentioned drive circuit is after AC power is converted to high-voltage DC power supply, when high-voltage DC power supply exports this fan motor coil unit to, have a high-voltage DC power supply this motor waveforms detection unit of flowing through, this moment, this motor current waveforms detection unit can varying in size along with the high-voltage DC power supply current loading, and the corresponding voltage drop of generation, be that the corresponding voltage drop that will produce changes the current waveform variation that is converted to high number of turn coil after computing, make motor manufacture process can via observation during in conducting the current waveform of this motor waveforms detection unit whether detect the fan motor operating state normal, to improve the stability of fan quality.
The consumed power of an inferior purpose of the present utility model each resistor in reducing above-mentioned pressure unit, the temperature when working, and then the life-span of increase assembly, and the reliability of lifting drive circuit to reduce resistor.Even above-mentioned pressure unit is via at least six resistors of series connection, make originally by two total consumed powers that resistor carried, can be allocated on each resistor of at least six resistors, and then make the consumed power of each resistor reduce, increase assembly useful life.
Description of drawings
Fig. 1: the circuit block diagram that is the utility model motor drive circuit;
Fig. 2: the detailed circuit diagram that is a preferred embodiment of the utility model motor drive circuit;
Fig. 3 A, Fig. 3 B, Fig. 3 C: when being the mutual conducting of two transistor for motor drive unit, by by voltage change in pressure drop on the motor current waveforms detection unit, and when judging motor and rotating a circle, the electric current that two high number of turn coils are produced changes oscillogram;
Fig. 4: the circuit block diagram that is a kind of ac motor driving circuit;
Fig. 5: the detailed circuit diagram that is Fig. 4.
[primary clustering symbol description]
10 AC-DC conversion unit
11 motor current waveforms detection unit
12 pressure units
13 fan motor driver elements
14 fan motor coil units
15 harmonic waves are eliminated the unit
16 overcurrent protection unit
20 AC-DC conversion unit
21 low pressure voltage regulation units
22 motor drive units
23 motor coil unit
24 harmonic waves are eliminated the unit
25 overcurrent protection unit
Embodiment
Seeing also shown in Figure 1ly, is the circuit block diagram that has the ac fan motor drive circuit of current waveform measuring ability for of the present utility model, and it includes:
One AC-DC conversion unit 10 is to be a current rectifying and wave filtering circuit, and its input is to be connected to AC power, exports after AC power is converted to high-voltage DC power supply;
One pressure unit 12 is to include at least six resistor in series to form, and is exported after high-voltage DC power supply is converted to a low-voltage dc power supply;
One fan motor driver element 13, it is the output that connects this pressure unit 12, consist predominantly of drive IC, a Hall perception component and a two transistor of a LVPS characteristic, the working range of the LVPS of above-mentioned drive IC is 3V～24V, and the current margin of Hall perception component is 2.5mA～10mA;
One fan motor coil unit 14, mainly formed by two-supremes number of turn coil, one end of each high number of turn coil is the output that connects this motor current waveforms detection unit 11, and the other end of two-supremes number of turn coil then is connected to the transistor of these fan motor driver element 13 correspondences respectively;
One harmonic wave is eliminated unit 15, is the output that an end connects this motor current waveforms detection unit 11, and the other end connects the transistor of this fan motor driver element 13, and in parallel with this fan motor coil unit 14; And
One motor current waveforms detection unit 11, be to be serially connected with between the output and this fan motor coil unit 14 of this AC-DC conversion unit 10, when these AC-DC conversion unit 10 outputs export high-voltage DC power supply to this fan motor coil unit 14, one high DC power supply electric current this motor current waveforms detection unit 11 of can flowing through, this moment, this motor current waveforms detection unit 11 can produce corresponding voltage drop along with the size of high DC power supply current loading.
Please refer to shown in Figure 2 again, it is detailed circuit diagram for a preferred embodiment of the present utility model, above-mentioned AC-DC conversion unit 10 is mainly a full-wave rectifier D1 and a high-voltage capacitor C1 in this preferred embodiment, the AC power of this input gives rectifying and wave-filtering via a full-wave rectifier D1 and a high-voltage capacitor C1 and converts a high-voltage DC power supply to, and with its high-voltage DC power supply output.
It is to be disclosed as 1 Ω that said motor current waveform detecting unit 11 is mainly following low-impedance resistor R 1 this resistor resistance in this preferred embodiment of one 5 Ω, avoid causing the numerical value of voltage drop on this resistor R 1 excessive because of resistor R 1 resistance is excessive, and the magnitude of voltage of the motor coil unit 14 of influence input rear end, in addition, these motor current waveforms detection unit 11 1 ends are the outputs that are connected to this AC-DC conversion unit 10, via the voltage drop numerical value that two ends produced to this low-impedance resistor R 1, after computing, be converted to the current waveform of high number of turn coil, current waveform via this high number of turn coil of observation changes, judge whether ac fan motor operations state is normal, and details are as follows for its detection method:
Please cooperate shown in Fig. 3 A, Fig. 3 B, Fig. 3 C, be two transistor Q1 for motor drive unit, during the mutual conducting of Q2, by by voltage change in pressure drop on the motor current waveforms detection unit 11, and when judging motor and rotating a circle, two high number of turn coil L1, electric current that L2 produced changes oscillogram, please at first consults shown in Fig. 3 A, for a kind of fan motor is judged as current waveform figure when working well, wherein, when motor rotates a circle, can produce four current waveforms, when working well as if fan motor, each wave period time can be identical among the figure, promptly 0 arrives T
0Can equal T cycle time
0To T
1, T
1To T
2And T
2To T
3Cycle time, and size waveforms is similar; If motor running is undesired, see also shown in Fig. 3 B, the cycle time among the figure during each waveform conducting is inequality, and promptly 0 to T
0' cycle time be not equal to T
0' to T
1' cycle time, T
0' to T
1' cycle time be not equal to T
1' to T
2' cycle time, T
1' to T
2' cycle time be not equal to T
2' to T
3' cycle time, speed was slow thereby can cause the fan motor rotor to produce the phenomenon of vibration when the rotating speed when promptly representing this fan motor to rotate more normally turned round; See also again shown in Fig. 3 C, this is abnormal relative oscillogram for another fan motor turns round, though the cycle time among the figure during conducting of each waveform is identical, but the current value of A, B, C, D point representative is inequality, wherein this B point and the D current values of ordering is when motor runs well in the present embodiment, coil produces the lowest high-current value of back electromotive force, but the current values I that A point and C are ordered among the figure
3The current values I of ordering greater than B point and D
2, thereby can produce noise and Electromagnetic Interference.Whether the former operating state that can utilize current waveform figure to detect fan motor is normal.
Again, this pressure unit 12, it is the output that is connected to this motor current waveforms detection unit 11, export after high-voltage DC power supply is converted to a low-voltage dc power supply, in this preferred embodiment the resistor R 2～R7 that comprises six series connection, owing to use the resistor R 2～R7 of six series connection, can make the dissipation power on each resistor reduce, and can change the output of output one LVPS equally, so can avoid causing the damage of assembly because of resistor is overheated, cause the drive circuit reliability to reduce, in addition, can increase by a bypass capacitor C 4 in resistor R 7 backs of least significant end,, increase the stability of drive circuit to filter the noise that DC power supply was produced.
In addition, above-mentioned fan motor driver element 13, it is the output that connects this pressure unit 12, consist predominantly of drive IC (IC1), a Hall perception component H1 and the two transistor Q1 with LVPS (3V-24V) characteristic, Q2, wherein the current margin of Hall perception component H1 is 2.5mA～10mA; And this fan motor coil unit 14, be mainly by two-supremes number of turn coil L1, L2 forms, each high number of turn coil L1, the end of L2 is the output that connects this motor current waveforms detection unit 11, and two-supremes number of turn coil L1, the other end of L2 then is connected to the transistor Q1 of these fan motor driver element 13 correspondences respectively, Q2.
Again, it is to include two diode D2 in this preferred embodiment that above-mentioned harmonic wave is eliminated unit 15, D3 and four zener diode DZ1～DZ4, two diode D2 wherein, D3 is the subtend connection and is series at two-supremes number of turn coil L1, between the L2, and four zener diode DZ1～DZ4 are one another in series and anode is the output that is connected to this motor current waveforms detection unit 11, its negative electrode is to be connected to two diode D2, connected node between the D3, because zener diode DZ1～DZ4 is connected in series four, so can avoid causing damage earth because of high number of turn coil produces big back electromotive force.
In the process of fan motor running, said fans motor drive unit 13 provides a low-voltage dc power supply for should drive IC (IC1) through pressure unit 12, this drive IC (IC1) is via receiving perceptual signal that Hall perception component H1 exported in order to regulation and control two transistor Q1, the mutual conducting of Q2, and two-supremes number of turn coil L1, L2 is then according to the two transistor Q1 that is linked to each other, the conducting of Q2 and produce the electric current of mutual circulation, its transistor Q1 that connects the first high number of turn coil L1 is converted to the moment of not conducting in conducting again, can in the inductance that this first high number of turn coil L1 is caused, produce back electromotive force, and the unnecessary electric current that this back electromotive force is produced is I among Fig. 3
2～I
3Part can be eliminated by four zener diode DZ1～DZ4 of this diode D2 and series connection, in the same manner, be converted to the moment of conducting in not conducting as the transistor Q2 that is connected to the second high number of turn coil L2, this second high number of turn coil L2 can produce back electromotive force equally, and the unnecessary electric current that this back electromotive force is produced is I among Fig. 3
2～I
3Part can be eliminated by four zener diode DZ1～DZ4 of another diode D3 and series connection, so, the electric current that back electromotive force produced can not flow into above-mentioned fan motor driver element 13, reduce the damage probability of this fan motor driver element 13 by this mode, and can eliminate the noise that is produced when unit 15 suppresses because of motor running and reduce electromagnetic interference via this harmonic wave.
In addition, the power supply of this fan motor coil unit 14 is a high-voltage DC power supply because of flowing through, so two-supremes number of turn coil L1, the electric current that L2 can obtain is bigger, thereby can pass through by increasing two-supremes number of turn coil L1, the number of turn of L2 increases impedance, and the electric current that is produced during with the reduction conducting reaches and improves fan motor rotating speed and less electricity consumption.
In addition; the utility model is in order to prevent that full-wave rectifier D1 and high-voltage capacitor C1 are when the motor coil short circuit; because of the overcurrent adverse current causes unexpected the generation; so can further add an overcurrent protection unit 16 between AC-DC conversion unit 10 and AC power, wherein this overcurrent protection unit 16 can be a fuse or is a low-impedance resistor.
As shown in the above description, the utility model can provide a kind of ac fan motor drive circuit with current waveform measuring ability, whether operating state is stable when turning round in order to detect fan motor, to improve the reliability of drive circuit, and can reduce the consumed power of each resistance via several series resistances of pressure drop unit, and provide the reliability of its drive circuit, again can zener diode effectively suppress the generation of harmonic wave through increasing several series connection, be with, the utility model can provide a stability better fan drive circuit really.
Claims (10)
1. ac fan motor drive circuit with current waveform measuring ability is characterized in that comprising:
One AC-DC conversion unit is to be a current rectifying and wave filtering circuit, and its input is to be connected to AC power, exports after AC power is converted to high-voltage DC power supply;
One pressure unit is to include at least six resistor in series to form, and is exported after high-voltage DC power supply is converted to a low-voltage dc power supply;
One fan motor driver element is the output that connects this pressure unit, consists predominantly of drive IC, a Hall perception component and a two transistor of a LVPS characteristic;
One fan motor coil unit, form by two-supremes number of turn coil, one end of each high number of turn coil is the output that connects this motor current waveforms detection unit, and the other end of two-supremes number of turn coil then is connected to the transistor of this fan motor driver element correspondence respectively; And
One harmonic wave is eliminated the unit, is the output that an end connects this motor current waveforms detection unit, and the other end connects the transistor of this fan motor driver element, and in parallel with this fan motor coil unit; And
One motor current waveforms detection unit, be to be serially connected with between the output and this fan motor coil unit of this AC-DC conversion unit, when this AC-DC conversion unit output exports high-voltage DC power supply to this fan motor coil unit, one high-voltage DC power supply electric current this motor current waveforms detection unit of can flowing through, this moment, this motor current waveforms detection unit can produce corresponding voltage drop along with the size of high-voltage DC power supply current loading.
2. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 1 is characterized in that, described this AC-DC conversion unit is formed by a full-wave rectifier and a high-voltage capacitor.
3. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 1 or 2 is characterized in that, described this motor waveforms detection unit is formed by at least one resistor.
4. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 3 is characterized in that, described this resistor resistance is less than 5 Ω.
5. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 1 or 2 is characterized in that the operating voltage range of described this drive IC is 3V～24V.
6. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 3 is characterized in that the operating voltage range of described this drive IC is 3V～24V.
7. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 1 or 2 is characterized in that the current margin of described this Hall perception component is 2.5～10mA.
8. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 1 or 2 is characterized in that, is to add an overcurrent protection unit between described this AC-DC conversion unit and the AC power.
9. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 8 is characterized in that, described this overcurrent protection unit is a fuse.
10. the ac fan motor drive circuit with current waveform measuring ability as claimed in claim 8 is characterized in that, described this overcurrent protection unit is a low-impedance resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200007726U CN2917088Y (en) | 2006-01-13 | 2006-01-13 | AC fan motor drive circuit with current waveform detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200007726U CN2917088Y (en) | 2006-01-13 | 2006-01-13 | AC fan motor drive circuit with current waveform detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2917088Y true CN2917088Y (en) | 2007-06-27 |
Family
ID=38188003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200007726U Expired - Fee Related CN2917088Y (en) | 2006-01-13 | 2006-01-13 | AC fan motor drive circuit with current waveform detection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2917088Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113614545A (en) * | 2019-04-12 | 2021-11-05 | 奥迪股份公司 | Method for determining the rotational speed of an electronically commutated electric machine |
| WO2022199329A1 (en) * | 2021-03-26 | 2022-09-29 | 山东英信计算机技术有限公司 | Heat dissipation and power supply module, and power supply frame |
| CN117129705A (en) * | 2023-10-25 | 2023-11-28 | 成都维客昕微电子有限公司 | Motor rotating speed detection system and method based on working current |
-
2006
- 2006-01-13 CN CNU2006200007726U patent/CN2917088Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113614545A (en) * | 2019-04-12 | 2021-11-05 | 奥迪股份公司 | Method for determining the rotational speed of an electronically commutated electric machine |
| CN113614545B (en) * | 2019-04-12 | 2024-06-07 | 奥迪股份公司 | Method for determining the rotational speed of an electronically commutated motor |
| WO2022199329A1 (en) * | 2021-03-26 | 2022-09-29 | 山东英信计算机技术有限公司 | Heat dissipation and power supply module, and power supply frame |
| CN117129705A (en) * | 2023-10-25 | 2023-11-28 | 成都维客昕微电子有限公司 | Motor rotating speed detection system and method based on working current |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070627 Termination date: 20130113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |