CN208739048U - Drive integrated circult for AC fan motor continuous variable speed - Google Patents
Drive integrated circult for AC fan motor continuous variable speed Download PDFInfo
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- CN208739048U CN208739048U CN201821338678.0U CN201821338678U CN208739048U CN 208739048 U CN208739048 U CN 208739048U CN 201821338678 U CN201821338678 U CN 201821338678U CN 208739048 U CN208739048 U CN 208739048U
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Abstract
A kind of drive integrated circult for AC fan motor continuous variable speed includes sensing unit, control unit, PWM unit, boosting unit and driving unit.Sensing unit continuously senses an AC fan motor and generates the sensing output at least indicating AC fan motor current rotating speed, control unit receives the input signal of one rotating speed of target of instruction, and including a look-up table, look-up table contains multiple rotating speed differences and multiple control signals for respectively corresponding rotating speed difference, control unit is according to the input signal, sensing output and look-up table, generate a speed controling signal, PWM unit generates a modulating signal according to the speed controling signal, boosting unit boosts to generate a boost signal to the modulating signal, driving unit generates the driving signal for being relevant to the rotating speed of target according to the boost signal, and the driving signal is exported to the AC fan motor, to reduce production cost.
Description
Technical field
The utility model relates to a kind of drive integrated circults, more particularly to one kind for driving AC fan motor without section
The drive integrated circult of speed change.
Background technique
The prior art mainly receives a power supply signal from a power supply using existing frequency-conversion drive apparatus, and leads to
A kind of variable-frequency driving technique is crossed to control the revolving speed of an alternating current motor.Specifically, existing frequency-conversion drive apparatus includes one
Control unit, a driving unit and other correlation units.The control unit is used to generate one according to an external rotary speed instruction
A control signal, the rotary speed instruction indicate a rotating speed of target.The driving unit is connected electrically between the power supply and the control unit,
And a frequency and the adjusted driving signal of voltage are generated according to the control signal and the power supply signal, the driving signal is related
In the rotating speed of target.Existing frequency-conversion drive apparatus exports the driving signal to the alternating current motor so that the alternating current motor according to
The driving signal and rotate and drive a fan with rotating speed of target rotation so that the fan generates be intended to air quantity.
However, the control unit and the driving unit are designed in two sseparated collection in existing frequency-conversion drive apparatus
At circuit, causes the circuit area of existing frequency-conversion drive apparatus larger and required manufacturing cost is higher.Therefore, existing frequency conversion drive
Device still has improved space.
Utility model content
The purpose of this utility model is to provide one kind can overcome background technique disadvantage for AC fan motor without
The drive integrated circult of section speed change.
The drive integrated circult for AC fan motor continuous variable speed of the utility model, which is suitable for receiving, comes from one
One power supply signal of power supply simultaneously generates a driving signal accordingly to drive an AC fan motor continuous variable speed.The use
In the drive integrated circult of AC fan motor continuous variable speed includes sensing unit, control unit, PWM unit, boost list
Member and driving unit.
The sensing unit continuously senses the AC fan motor and generates a sensing output, and sensing output refers to
Show a rotor-position of the AC fan motor current rotating speed and the AC fan motor.
Described control unit receive one instruction one rotating speed of target input signal, and be electrically connected the sensing unit with
Sensing output is received, described control unit includes the memory module of one look-up table of a storage, and the look-up table contains more
A rotating speed difference and multiple control signals for respectively corresponding the rotating speed difference, described control unit according to the input signal, should
Sensing output and the look-up table, generate the speed controling signal for being relevant to the rotating speed of target, which is
One of described control signal, described control unit are a PLC technology unit.
The PWM unit is electrically connected described control unit to receive the speed controling signal, and according to the revolving speed control
Signal processed generates an adjusted modulating signal of voltage swing, and the pulse bandwidth of the modulating signal is with the speed controling signal
Variation and change.
The boosting unit is electrically connected the PWM unit to receive the modulating signal, and carries out to the modulating signal
Boosting, to generate a boost signal.
The driving unit is connected electrically between the boosting unit and the AC fan motor, and is received and come from the liter
The boost signal of unit is pressed, and the driving signal for being relevant to the rotating speed of target is generated according to the boost signal, and by the drive
Dynamic signal is exported to the AC fan motor, and the driving unit is the unit of a high pressure resistant specification.
The drive integrated circult for AC fan motor continuous variable speed of the utility model, the sensing unit are one
Hall sensing unit.
The drive integrated circult for AC fan motor continuous variable speed of the utility model, described control unit are defeated by this
Enter the rotating speed of target indicated by signal and cut the indicated AC fan motor current rotating speed of sensing output, to obtain
One current rotating speed difference, and comparison of tabling look-up is carried out from the look-up table according to rotating speed difference before deserving, and by the revolving speed
A control signal corresponding to a rotating speed difference corresponding with preceding rotating speed difference is deserved in difference is as the revolving speed control
Signal processed.
The drive integrated circult for AC fan motor continuous variable speed of the utility model, the driving unit include:
Signal shifter has the first pin to the 8th pin, and first pin receives the power supply signal, and described second
Pin and third pin, which are electrically connected the boosting unit and match, receives the boost signal, and the 4th pin is electrically connected to
Ground；
First capacitor device is connected electrically between first pin and the 4th pin；
Diode, the yin of the anode for being electrically connected first pin with one and electrical connection the 8th pin
Pole；
Second capacitor is connected electrically between the 6th pin and the 8th pin；
First resistor device, first end and a second end with electrical connection the 7th pin；
Second resistor, first end and a second end with electrical connection the 5th pin；
The first transistor, the of first end with one bias voltage of reception, electrical connection the 6th pin
The control terminal of the second end of two ends and an electrical connection first resistor device；And
Second transistor has a first end, a second end being coupled electrically to ground and an electrical connection described second
Described the of the control terminal of the second end of resistor, the first end of the second transistor and the first transistor
The output at two ends is as the driving signal.
The drive integrated circult for AC fan motor continuous variable speed of the utility model, the first capacitor device are one
A polar capacitor, the first resistor device and second resistor are respectively a current-limiting resistor.
The utility model has the beneficial effects that: the sensing unit, described control unit, the PWM unit,
The boosting unit and the driving unit are incorporated into the single drive integrated circult, so that described in the present embodiment
Drive integrated circult has lesser circuit area and required manufacturing cost is lower.
Detailed description of the invention
Fig. 1 is a block schematic diagram, illustrates that driving of the utility model for AC fan motor continuous variable speed is integrated
One embodiment of circuit；And
Fig. 2 is a circuit block diagram, illustrates a driving unit of the embodiment.
Specific embodiment
Refering to fig. 1, the utility model is suitable for being electrically connected for the drive integrated circult 20 of AC fan motor continuous variable speed
It connects between a power supply 11 and one include the AC fan motor 12 of a rotor 121, receives one from the power supply 11
Power supply signal VCC simultaneously generates a driving signal Ds accordingly to drive 12 continuous variable speed of AC fan motor.The driving is integrated
Circuit 20 includes the 4, boosting units 5 of the PWM unit of control unit 3, one of sensing unit 2, one and one
Driving unit 6.
The sensing unit 2 continuously (or regularly) senses the AC fan motor 12 and the SN polarity of the rotor 121 becomes
Generated signal is changed, exports Ss to generate a sensing, sensing output Ss indicates 12 current rotating speed of AC fan motor
An and rotor-position of the rotor 121 of the AC fan motor 12.In the present embodiment, the sensing unit 2 be one suddenly
That sensing unit.
The control unit 3 receive one instruction one rotating speed of target input signal Is, and be electrically connected the sensing unit 2 with
Receive sensing output Ss.The control unit 3 includes the memory module 31 of one look-up table 311 of a storage, the look-up table 311
Contain multiple rotating speed differences and multiple control signals for respectively corresponding the rotating speed difference.The control unit 3 is believed according to the input
Number Is, sensing output Ss and the look-up table 311, generate the speed controling signal Cs for being relevant to the rotating speed of target, this turn
Speed control signal Cs is one of described control signal.Specifically, which first will be indicated by input signal Is
The rotating speed of target cut the sensing output Ss indicated by 12 current rotating speed of AC fan motor, work as forward to obtain one
Speed difference value then carries out comparison of tabling look-up from the look-up table 311 further according to rotating speed difference before deserving, and will be in the rotating speed difference
One with deserve before a control signal corresponding to the corresponding rotating speed difference of rotating speed difference as the speed controling signal
Cs。
It should be noted that in the present embodiment, which is a PLC technology unit.Input signal Is
It is to be operated from a user input interface (not shown) by a user and generated in response to the input of a corresponding rotating speed of target,
That is, the user can arbitrarily adjust the rotating speed of target, and the drive of driving signal Ds is generated according to input signal Is
Dynamic integrated circuit 20 can drive the AC fan motor 12 to reach continuous variable speed accordingly.Described turn contained by the look-up table 311
Speed difference value and the control signal are the tables pre-established by the user via a programming setting, which can constantly more
The new look-up table 311.Speed controling signal Cs is used to that the AC fan motor 12 is made to improve revolving speed, reduces revolving speed, or maintains
Revolving speed.For example, when rotating speed difference is negative (or positive number) before deserving, it is big to represent 12 current rotating speed of AC fan motor
In (or being less than) rotating speed of target, the control unit 3 is according to rotating speed difference before deserving from this obtained turn in the look-up table 311
Speed control signal Cs is used to reduce the AC fan motor 12 by revolving speed (or improving revolving speed).Rotating speed difference is zero before deserving
When, 12 current rotating speed of AC fan motor is represented equal to the rotating speed of target, the generated revolving speed control letter of the control unit 3
Number Cs is used to that the AC fan motor 12 is made to maintain revolving speed.
The PWM unit 4 is electrically connected the control unit 3 to receive speed controling signal Cs, and according to the revolving speed
Signal Cs is controlled to generate the adjusted modulating signal Ms of a voltage swing (voltage swing of modulating signal Ms is 12V), and
The pulse bandwidth of modulating signal Ms changes with the variation of speed controling signal Cs.For example, when deserving preceding rotational speed difference
Value is for negative and when speed controling signal Cs is used to reduce the AC fan motor 12 by revolving speed, the pulse wave of modulating signal Ms
Width narrows with the variation of speed controling signal Cs.On the contrary, rotating speed difference is positive number before deserving and the revolving speed controls
When signal Cs is used to that the AC fan motor 12 is made to improve revolving speed, then the pulse bandwidth of modulating signal Ms controls with the revolving speed and believes
The variation of number Cs and broaden.
The boosting unit 5 is electrically connected the PWM unit 4 to receive modulating signal Ms, and to modulating signal Ms into
Row boosting, to generate a boost signal Bs (voltage swing of boost signal Bs is 24V~48V), so that the boost signal
The voltage swing of Bs is enough to drive the driving unit 6.
The driving unit 6 is connected electrically between the boosting unit 5 and the AC fan motor 12, and is received and come from the boosting list
The boost signal Bs of member 5, and the driving signal Ds for being relevant to the rotating speed of target is generated according to boost signal Bs, and should
Driving signal Ds is exported to the AC fan motor 12, so that the AC fan motor 12 rotates simultaneously according to driving signal Ds
Drive a fan (not shown) with rotating speed of target rotation, so that the fan generates be intended to air quantity.In the present embodiment, should
Driving unit 6 is the unit of a high pressure resistant specification.The voltage swing of driving signal Ds is 110V or 220V, and frequency size is
50Hz or 60Hz.The driving unit 6 can drive the high power AC fan motor that required power is 20W~90W to rotate.
Further regard to Fig. 2, the driving unit 6 include a signal shifter 61, first and second capacitor 62,63,
One diode 64, first and second resistor 65,66 and first and second transistor 67,68.
There is the signal shifter 61 first to the 8th pin P1~P8, first pin P1 to receive power supply signal VCC,
Described second and third pin P2, P3, which are electrically connected the boosting unit 5 and match, receives boost signal Bs, the 4th pin
P4 is coupled electrically to ground.
The first capacitor device 62 is connected electrically in described first and the 4th between pin P1, P4.Second capacitor 63 electrical connection
Between described 6th and the 8th pin P6, P8.The diode 64 has the anode and one for being electrically connected first pin P1
The cathode of the 8th pin P8 of a electrical connection.The first resistor device 65 has the first end for being electrically connected the 7th pin P7,
An and second end.The second resistor 66 has a first end for being electrically connected the 5th pin P5 and a second end.It should
The first transistor 67 is electrically connected the second of the 6th pin P6 with a first end for receiving a bias voltage VDD, one
The control terminal of end and a second end for being electrically connected the first resistor device 65.The second transistor 68 have a first end,
One second end being coupled electrically to ground and one are electrically connected the control terminal of the second end of the second resistor 66.Second crystalline substance
The output of the second end of first end and the first transistor 67 of body pipe 68 is as driving signal Ds.
It should be noted that in the present embodiment, which is a polar capacitor, it is described first and second
Resistor 65,66 is respectively a current-limiting resistor.First and second described transistor 67,68 is respectively N-type gold oxygen half
Field-effect transistor, wherein the drain electrode of the N-type metal-oxide half field effect transistor, source electrode and grid are respectively first and second described crystalline substance
The first end, the second end and control terminal of each of body pipe 67,68.In addition, the effect of the signal shifter 61 is
Boost signal Bs received by it is switched over via its own internal switch come the frequency for the boost signal Bs that is staggered,
A signal is exported from the 7th pin P7 to drive the first transistor 67 to be divided into, and another from the 5th pin P5 output
A signal drives the second transistor 68.In addition, the signal shifter 61 via the 6th pin P6 persistently detect this first
Transistor 67 is normal output or is lockked that, if the first transistor 67 is lockked, which resets one
Signal is via the 6th pin P6 and second capacitor 63 output to the 8th pin P8 to be reset.The signal shifter
61 thin portion circuit structure has a variety of different state sample implementations and is known to those skilled in the art, so not in this
It repeats.
In conclusion due to the sensing unit 2, the control unit 3, the PWM unit 4, the boosting unit 5, and should
Driving unit 6 be incorporated into the single drive integrated circult 20, in this way, the drive integrated circult 20 compared to
Existing frequency-conversion drive apparatus has lesser circuit area, and required manufacturing cost is lower.Further, since the sensing unit 2 connects
Sense the AC fan motor 12 obtained sensing output Ss continuously it can be seen that 12 current rotating speed of AC fan motor and
The rotor-position of the rotor 121, therefore the drive integrated circult 20 driving signal Ds according to caused by sensing output Ss
The transistor (not shown) in the AC fan motor 12 can be made to reach zero point switching, and then the AC fan motor 12 will not
Contravariant electromotive force is generated to the driving unit 6, the driving unit 6 is so can avoid and is damaged because of contravariant electromotive force, so that this reality
The service life for applying the example drive integrated circult 20 is extended.Furthermore the sensing unit 2 is to be continued for sensing the exchange wind
Fan motor 12 so that the drive integrated circult 20 be able to the sensing persistently exported according to the sensing unit 2 output Ss and one
Straight adjust automatically driving signal Ds, such drive integrated circult 20 can reach actual revolution to the AC fan motor 12 and detect
Survey and rate controlling, and avoid causing its revolving speed not reach the rotating speed of target because of 12 sole mass difference of the AC fan motor or aging
The case where occur.
As described above, only the embodiments of the present invention, when the utility model implementation cannot be limited with this
Range, i.e., it is all according to simple equivalent changes and modifications made by the utility model claims book and description, all still belong to
The scope of the utility model.
Claims (5)
1. a kind of drive integrated circult for AC fan motor continuous variable speed, suitable for receiving one from a power supply
Power supply signal simultaneously generates a driving signal accordingly to drive an AC fan motor continuous variable speed, which is characterized in that described
Drive integrated circult for AC fan motor continuous variable speed includes:
Sensing unit senses the AC fan motor continuously to generate a sensing output, which exports described in instruction
One rotor-position of AC fan motor current rotating speed and the AC fan motor；
Control unit, receives the input signal of one rotating speed of target of an instruction, and is electrically connected the sensing unit to receive this
Sensing output, described control unit include the memory module of one look-up table of a storage, and the look-up table contains multiple revolving speeds
Difference and multiple control signals for respectively corresponding the rotating speed difference, described control unit are defeated according to the input signal, the sensing
Out and the look-up table, generation one are relevant to the speed controling signal of the rotating speed of target, which is the control
One of signal processed, described control unit are a PLC technology unit；
PWM unit is electrically connected described control unit to receive the speed controling signal, and according to the speed controling signal
The adjusted modulating signal of voltage swing is generated, and the pulse bandwidth of the modulating signal is with the variation of the speed controling signal
And change；
Boosting unit is electrically connected the PWM unit to receive the modulating signal, and boost to the modulating signal, with
Generate a boost signal；And
Driving unit is connected electrically between the boosting unit and the AC fan motor, and is received and come from the boosting unit
The boost signal, and the driving signal for being relevant to the rotating speed of target is generated according to the boost signal, and by the driving signal
To the AC fan motor, the driving unit is the unit of a high pressure resistant specification for output.
2. the drive integrated circult according to claim 1 for AC fan motor continuous variable speed, which is characterized in that institute
Stating sensing unit is a Hall sensing unit.
3. the drive integrated circult according to claim 1 for AC fan motor continuous variable speed, which is characterized in that institute
It states control unit and the rotating speed of target indicated by the input signal is cut into the indicated ac fan horse of sensing output
Up to current rotating speed, to obtain a current rotating speed difference, and tabled look-up according to rotating speed difference before deserving from the look-up table
It compares, and one corresponding to the rotating speed difference corresponding with preceding rotating speed difference is deserved of one in the rotating speed difference is controlled
Signal is as the speed controling signal.
4. the drive integrated circult according to claim 1 for AC fan motor continuous variable speed, which is characterized in that institute
Stating driving unit includes:
Signal shifter has the first pin, the second pin, third pin, the 4th pin, the 5th pin, the 6th pin, the 7th
Pin and the 8th pin, first pin receive the power supply signal, and second pin and third pin are electrically connected the liter
It presses unit and matches and receive the boost signal, the 4th pin is coupled electrically to ground；
First capacitor device is connected electrically between first pin and the 4th pin；
Diode, the cathode of the anode for being electrically connected first pin with one and electrical connection the 8th pin；
Second capacitor is connected electrically between the 6th pin and the 8th pin；
First resistor device, first end and a second end with electrical connection the 7th pin；
Second resistor, first end and a second end with electrical connection the 5th pin；
The first transistor is electrically connected the second end of the 6th pin with a first end for receiving a bias voltage, one,
And the control terminal of the second end of an electrical connection first resistor device；And
Second transistor has a first end, a second end being coupled electrically to ground and an electrical connection second resistance
The control terminal of the second end of device, the first end of the second transistor and the second end of the first transistor
Output as the driving signal.
5. the drive integrated circult according to claim 4 for AC fan motor continuous variable speed, which is characterized in that institute
Stating first capacitor device is a polar capacitor, and the first resistor device and second resistor are respectively a current-limiting resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338678.0U CN208739048U (en) | 2018-08-20 | 2018-08-20 | Drive integrated circult for AC fan motor continuous variable speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338678.0U CN208739048U (en) | 2018-08-20 | 2018-08-20 | Drive integrated circult for AC fan motor continuous variable speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208739048U true CN208739048U (en) | 2019-04-12 |
Family
ID=66031431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821338678.0U Expired - Fee Related CN208739048U (en) | 2018-08-20 | 2018-08-20 | Drive integrated circult for AC fan motor continuous variable speed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208739048U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245331A (en) * | 2020-01-06 | 2020-06-05 | 广东盈科电子有限公司 | AC motor constant rotating speed control method and device based on rotating speed feedback |
-
2018
- 2018-08-20 CN CN201821338678.0U patent/CN208739048U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111245331A (en) * | 2020-01-06 | 2020-06-05 | 广东盈科电子有限公司 | AC motor constant rotating speed control method and device based on rotating speed feedback |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190412 Termination date: 20210820 |