CN110381624A - The parallel connection LED flow equalizing circuit of motor-driven system - Google Patents
The parallel connection LED flow equalizing circuit of motor-driven system Download PDFInfo
- Publication number
- CN110381624A CN110381624A CN201810317661.5A CN201810317661A CN110381624A CN 110381624 A CN110381624 A CN 110381624A CN 201810317661 A CN201810317661 A CN 201810317661A CN 110381624 A CN110381624 A CN 110381624A
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- motor
- led
- switch block
- parallel connection
- flow equalizing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The present invention discloses a kind of parallel connection LED flow equalizing circuit of motor-driven system.The circuit includes at least two LED circuits, input power, switch block, diode and the motor drive circuit being connected in parallel to each other；Each LED circuit include light emitting diode and with light emitting diode is concatenated flows component, one end of stream component is connected to the cathode of light emitting diode；Input power is connected to the anode of each light emitting diode；Switch block one end is connected to each other end for flowing component, switch block other end ground connection；Diode one end is connected to input power, and it is in parallel at least two LED circuits that the diode other end is connected to switch block；The control terminal of first driving end connection switch component of motor drive circuit, and export the first driving signal.It is not required to separately add driving power for the driving of framework altogether due to using anti-buck power adapter framework, motor drive circuit and switch block, and controls the duty ratio of output pulse-modulated signal, can determine LED current.
Description
Technical field
The present invention relates to a kind of parallel connection LED flow equalizing circuits of motor-driven system, include that motor drives more particularly to one kind
The parallel connection LED flow equalizing circuit of the motor-driven system of dynamic circuit and stream component.
Background technique
LED illumination is gradually widely used in illumination market because of power saving.LED have been practically applied for certain household appliances with
Lamps and lanterns floor light, such as smoke exhaust ventilator, it will usually there are two LED lamps and lanterns as floor light, and on such household electrical appliances, be are provided
Promotion reliability, should arrange in pairs or groups equal Flow Technique.
Existing smoke exhaust ventilator application has imported Brushless DC motor, generally has plate drive motor, in addition to controlling motor,
Driving plate power supply also can provide the power supply of LED drive circuit and human-machine operation panel, this part has also been integrated in commercial product
The design of formula connects.
And in existing equal Flow Technique, simplest LED driving method is to mention after input voltage series limiting resistor
Supply LED.Such framework is although simple and low in cost, however, current-limiting resistance is power resistor, temperature is high, volume is big, more
Meeting loss power, therefore inefficient.Furthermore due to LED characteristic error, constant voltage can not flow when driving plurality of LEDs.
IC is driven using dedicated LED in addition, also having in this field, is depressured pattern framework for example, by using BUCK.BUCK decompression
The advantage of pattern framework is to have application-specific integrated circuit can be selected, can do electric current feedback control, is high-efficient, however with aforementioned existing way phase
Than, higher cost, and the still uneven stream in the double LED currents of single output-parallel.Also, application-specific integrated circuit driving metal oxide is needed partly to lead
Body (Metal-Oxide-Semiconductor, MOS) switch separately needs one group of power drives MOS if not using application-specific integrated circuit.This
Outside, electric current feedback is carried out if having, Yu Danyi LED will cause electric current and all concentrates when damaging flow to another LED, and makes operation electric
Stream is original several times, therefore accelerates LED aging or damage.
Therefore, above-mentioned to overcome the problems, such as, it has also become the art is intended to how by improveing equal stream architecture
One of important topic of solution.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of motor-driven system in view of the deficiencies of the prior art
Parallel connection LED flow equalizing circuit.
In order to solve the above technical problems, a wherein technical solution of the present invention is to provide a kind of motor drive
The parallel connection LED flow equalizing circuit of dynamic system, the parallel connection LED flow equalizing circuit of the motor-driven system include: at least two LED circuits that
This is in parallel, and each LED circuit includes a light emitting diode and flows component with the light emitting diode concatenated one, and described
The one end for flowing component is connected to the cathode of the light emitting diode；One input power is connected to each light emitting diode
Anode；One switch block, a first end of the switch block are connected to each other end for flowing component, the switching group
One second end of part is grounded；One diode, one end of the diode are connected to the input power, the diode it is another
End is connected to the first end of the switch block and in parallel at least two LED circuits；And a motor drive circuit,
With one first driving end and a ground terminal, first driving end connects a control terminal of the switch block, and exports one
First driving signal, the ground terminal are connected to the second end of the switch block.
Preferably, each stream component is inductance.
Preferably, the inductance value of each inductance is equal.
Preferably, the motor drive circuit includes a Pulse width modulation module, the Pulse width modulation module warp
It configures using the pulse width modulating signal by first driving end output as first driving signal.
Preferably, the parallel connection LED flow equalizing circuit of the motor-driven system further includes a motor sub-assembly, the motor sub-assembly
It is connected to one second driving end of the motor drive circuit, the Pulse width modulation module is configured to pass described second
End is driven to export another pulse width modulating signal as one second driving signal, to drive the motor sub-assembly.
Preferably, the switch block is metal oxide semiconductcor field effect transistor.
In order to solve the above technical problems, an other technical solution of the present invention is to provide a kind of parallel connection LED
Flow equalizing circuit, the parallel connection LED flow equalizing circuit include: that at least two LED circuits are connected in parallel to each other, and each LED circuit includes a hair
Optical diode and component is flowed with the light emitting diode concatenated one, and described one end for flowing component is connected to described shine
The cathode of diode；One input power is connected to the anode of each light emitting diode；One switch block, the switch block
A first end be connected to it is each it is described flow component the other end, the switch block a second end ground connection；And one or two pole
Pipe, one end of the diode are connected to the input power, and the other end of the diode is connected to the switch block
The first end and it is in parallel at least two LED circuits, wherein a control terminal of the switch block for receive one first
Driving signal.
Preferably, each stream component is the equal inductance of inductance value.
Preferably, first driving signal is a pulse width modulating signal.
Preferably, the switch block is metal oxide semiconductcor field effect transistor (MOSFET).
The parallel connection LED flow equalizing circuit of motor-driven system through the invention, it is only necessary to a stabilizer blade position of motor drive circuit
It is i.e. controllable to export impulse modulation (Pulse Width Modulation, PWM) signal, is not required to separately add driving IC.
Due to using anti-buck power adapter framework, motor drive circuit and switch block as the drive of framework altogether
It is dynamic, it is also not required to separately add driving power.Furthermore the duty ratio for controlling motor drive circuit output pulse-modulated signal, can determine
LED current.
In addition, caused electric current problems of too when single LED is damaged can be solved with each series inductance of LED, can be promoted reliable
Degree.If also, can control inductance error value, it can control LED current in certain error range, equal flow problem can be improved.And
Compared with prior art, due to being not required to application-specific integrated circuit, and the motor drive circuit of shared motor-driven system, although increasing inductance
Setting, can still save cost.
Be further understood that feature and technology contents of the invention to be enabled, please refer to below in connection with it is of the invention specifically
Bright and attached drawing, however provided attached drawing is merely provided for reference and description, is not intended to limit the present invention.
Detailed description of the invention
Fig. 1 is the circuit arrangement map of the parallel connection LED flow equalizing circuit of first embodiment of the invention.
Fig. 2 is the circuit arrangement map of the parallel connection LED flow equalizing circuit of the motor-driven system of second embodiment of the invention.
Specific embodiment
Be below illustrated by particular specific embodiment it is presently disclosed in relation to the " parallel connection of motor-driven system
The embodiment of LED flow equalizing circuit ", those skilled in the art can understand advantages of the present invention by content disclosed in this specification
With effect.The present invention can be implemented or be applied by other different specific embodiments, the various details in this specification
It can carry out various modifications and change in the case where not departing from design of the invention based on different viewpoints and application.In addition, of the invention is attached
Figure is only simple schematically illustrate, not according to the description of actual size, states in advance.The following embodiments and the accompanying drawings will further specifically
Bright the relevant technologies content of the invention, but the protection scope that disclosure of that is not intended to limit the invention.
It should be understood that although various assemblies or signal may be described using term first, second, third, etc. herein,
But these components or signal should not be limited by these terms.These terms are mainly to distinguish a component and another group
Part or a signal and another signal.In addition, term "or" used herein, should may include correlation depending on actual conditions
Connection lists any of project or multiple combinations.
First embodiment
Refering to Figure 1, Fig. 1 is the circuit arrangement map of the parallel connection LED flow equalizing circuit of first embodiment of the invention.By upper
State in figure it is found that first embodiment of the invention provides a kind of parallel connection LED flow equalizing circuit 1, including be connected in parallel to each other LED circuit 10,
12, input power Vin, switch block S1 and diode D1.LED circuit 10 includes Light-emitting diode LED 1 and and light emitting diode
LED1 is concatenated to flow component 100, LED circuit 12 include Light-emitting diode LED 2 and with Light-emitting diode LED 2 is concatenated flows
Component 120.The one end for flowing component 100 is connected to the cathode of Light-emitting diode LED 1, and one end of stream component 120 is connected to hair
The cathode of optical diode LED2.Input power Vin is connected to Light-emitting diode LED 1 and the anode of LED2.Switch block S1's
First end is connected to the other end for flowing component 100,120, the second end ground connection of switch block S1.The one end diode D1 is connected to
Input power Vin, the diode D1 other end are connected to the first end of switch block S1 and in parallel with two LED circuits 10,12.Its
In, the control terminal C1 of switch block S1 is for receiving the first driving signal DRV1.
Parallel connection LED flow equalizing circuit 1 is for carrying out the anti-decompression for being depressured predetermined D/C voltage obtained to input power Vin
Formula power adapter framework.Switch block S1 can be made of field-effect transistor (FET), and flowing component 100,120 can be by inductance
It constitutes.In the present embodiment, switch block S1 is installed on the line side of ground connection, is achieved in stable switch control.
First driving signal DRV1 is the driving letter controlled for the ON/OFF (on/off) to switch block S1
Number, also, the turn-off time of switch block S1 section is controlled as specific time period.
Then, in the present embodiment, in the case where switch block S1 is switched to conducting by the first driving signal DRV1, electricity
Stream flows path and the light emitting diode of component 100- switch block S1- ground terminal respectively along Light-emitting diode LED 1-
LED2- flows the path flowing of component 120- switch block S1- ground terminal.
At this point, flowing through the rate of climb for flowing the electric current (conducting electric current of switch block S1) of component 100,120 based on defeated
Enter the size of power supply Vin and changes.That is, flowing through the electric current for flowing component 100,120 in the lower situation of input power Vin
The rate of climb it is slack-off, and in the higher situation of input power Vin, flow through the upper raising speed for flowing the electric current of component 100,120
Degree becomes faster.
When switch block S1 is switched to disconnection by the first driving signal DRV1, electric current is respectively along stream component 100- bis-
Pole pipe D1- Light-emitting diode LED 1 and the closed circuit flowing for flowing component 120- diode D1- Light-emitting diode LED 2, and
The electric current for flowing through stream component 100,120 gradually decreases.
By repeating aforesaid operations, the first driving signal DRV1 controls switch block S1, can determine luminous two
The electric current of pole pipe LED1 and LED2.Therefore, when the first driving signal DRV1 is that pulse width modulates (PWM) signal, duty ratio D
Light-emitting diode LED 1 and the electric current of LED2 will can be determined according to following formula 1.
Formula 1:
Therefore, the duty ratio of control motor drive circuit output pulse-modulated signal, can determine LED current.And it flows
, can also be when single LED be damaged when component 100,120 is made of inductance, whether open circuit breakage or Damage by Short Circuit, can solve
Electric current problems of too, therefore improve reliability.
Continue equation 1 above, when stream component 100,120 is made of inductance, inductance value must be identical.Preferably, if can control
Make two inductance error values, for example, less than 5%, less than 3% or less than 1%, then can control two LED electric currents in it is certain accidentally
Poor range improves equal flow problem.
Second embodiment
Referring to FIG. 2, Fig. 2 is the circuit of the parallel connection LED flow equalizing circuit of the motor-driven system of second embodiment of the invention
Layout.In this embodiment, it is similar to first embodiment, similar component symbol represents similar component, and repeats no more.
As shown, second embodiment of the invention provides a kind of parallel connection LED flow equalizing circuit 2 of motor-driven system, including
The LED circuit 20 being connected in parallel to each other and 22, input power Vin, N-type MOS field-effect transistor NM1, diode D1 and motor driving electricity
Road 24.
LED circuit 20 include Light-emitting diode LED 1 and with the concatenated inductance L1 of Light-emitting diode LED 1, LED circuit 22 wrap
Include Light-emitting diode LED 2 and with the concatenated inductance L2 of Light-emitting diode LED 2.One end of inductance L1, L2 are connected to luminous
The cathode of diode (LED) 1, LED2.Input power Vin is connected to the anode of Light-emitting diode LED 1, LED2.MOS effects of N-type are brilliant
The drain D of body pipe NM1 is connected to the other end of inductance L1, L2, the source S ground connection of N-type MOS field-effect transistor NM1.Diode D1
One end is connected to input power Vin, and the diode D1 other end is connected to the drain D of N-type MOS field-effect transistor NM1, and and LED
Circuit 20,22 is in parallel.
In addition, motor drive circuit 24 has power end VCC, the first driving end DR1 and ground terminal GND, power end VCC company
It is connected to another voltage source Vcc, this voltage source Vcc can be identical voltage source, the first driving end DR1 connection N-type with input power Vin
The gate G of MOS field-effect transistor NM1, ground terminal GND are connected to the source S of N-type MOS field-effect transistor NM1.
In this embodiment, although only depicting LED circuit 20 and 22, and it is contemplated that, it can will be additional according to demand
LED circuit be added to the parallel connection LED flow equalizing circuit 2 of motor-driven system, and each LED circuit is provided with and concatenated shines two
Pole pipe and inductance, to increase the flexibility on implementing.
In this embodiment, motor drive circuit 24 further includes Pulse width modulation module 240, Pulse width modulation module
240, which are configured to pass the first driving end DR1, exports a pulse width modulating signal PWM1, using as the first driving signal DRV1
N-type MOS field-effect transistor NM1 is controlled.When the first driving signal DRV1 is pulse width modulating signal PWM1, duty
Light-emitting diode LED 1 and the electric current of LED2 will can be determined according to following formula 1 than D.
Formula 1:
Therefore, control motor drive circuit 24 exports the duty ratio of pulse-modulated signal PWM1, can determine LED current.
, more can be when single LED be damaged in addition, flow effect except can provide by the configuration of inductance L1, L2, whether open circuit breakage
Or Damage by Short Circuit, it can solve electric current problems of too, therefore improve reliability.Preferably, it is missed if can control two inductance
Difference, for example, less than 5%, less than 3% or less than 1%, then can control two LED electric currents in certain error range, improvement is flowed
Problem.
In addition, needing application-specific integrated circuit to drive metal-oxide semiconductor (MOS) (Metal- in conventionally employed BUCK decompression pattern framework
Oxide-Semiconductor, MOS) switch, it is another to need one group of power drives MOS field-effect transistor if not using application-specific integrated circuit.
Different, in the present embodiment, motor drive circuit 24 can be microcontroller (MCU) common in motor-driven system,
Only need universal input and output (General-purpose input/output, a GPIO) pin output PWM can be right
LED current is controlled.Furthermore due to using anti-buck power adapter framework, motor drive circuit and switch block
For the driving of total ground framework, also it is not required to separately add driving power to drive MOS field-effect transistor.
For example, motor drive circuit 24 can be micro- for what is commonly used in the motor-driven system of drive motor assembly 26
Controller (MCU), for example, brushless motor, uses brushless motor, as smoke exhaust ventilator motor, to have following than conventional AC motor
Advantage: brushless motor can easily reach continuous variable speed, can there is broader rotating-speed modulation range than conventional AC motor.Separately
Outside, brushless motor has better energy efficiency, more saves the energy than conventional AC motor.Therefore more suitable for making in smoke exhaust ventilator
With.
In the present embodiment, motor drive circuit 24 may include the second driving end DR2, for exporting the second driving signal
DRV2 carrys out drive motor assembly 26.Herein, Pulse width modulation module 240 can be used for exporting another pulse width modulating signal
PWM2 can be directed to different situations as the second driving signal DRV2, accurately motor velocity of rotation needed for automatic setting.
And compared with prior art, due to being not required to application-specific integrated circuit, and the motor drive circuit of shared motor-driven system, although increasing electricity
The setting of sense can still save cost.
In conclusion the parallel connection LED flow equalizing circuit of motor-driven system through the invention, it is only necessary to motor drive circuit
One stabilizer blade position exports impulse modulation (Pulse Width Modulation, PWM) signal and can control, and is not required to separately add driving IC.
Due to using anti-buck power adapter framework, motor drive circuit and switch block as the drive of framework altogether
It is dynamic, it is also not required to separately add driving power.Furthermore the duty ratio for controlling motor drive circuit output pulse-modulated signal, can determine
LED current.
In addition, caused electric current problems of too when single LED is damaged can be solved with each series inductance of LED, can be promoted reliable
Degree.If also, can control inductance error value, it can control LED current in certain error range, equal flow problem can be improved.And
Compared with prior art, due to being not required to application-specific integrated circuit, and the motor drive circuit of shared motor-driven system, although increasing inductance
Setting, can still save cost.
Content disclosed above is only preferred possible embodiments of the invention, not thereby limits to right of the invention and wants
The protection scope of book is sought, so all equivalence techniques variations done with description of the invention and accompanying drawing content, are both contained in
In the protection scope of claims of the present invention.
Claims (10)
1. a kind of parallel connection LED flow equalizing circuit of motor-driven system, which is characterized in that the parallel connection LED of the motor-driven system
Flow equalizing circuit includes:
At least two LED circuits are connected in parallel to each other, and each LED circuit includes a light emitting diode and connects with the light emitting diode
One flow component, and described one end for flowing component is connected to the cathode of the light emitting diode；
One input power is connected to the anode of each light emitting diode；
One switch block, a first end of the switch block are connected to each other end for flowing component, the switching group
One second end of part is grounded；
One diode, one end of the diode are connected to the input power, and the other end of the diode is connected to described
The first end of switch block and it is in parallel at least two LED circuits；And
One motor drive circuit, has one first driving end and a ground terminal, and first driving end connects the switch block
A control terminal, and export one first driving signal, the ground terminal is connected to the second end of the switch block.
2. the parallel connection LED flow equalizing circuit of motor-driven system according to claim 1, which is characterized in that each described to flow
Component is inductance.
3. the parallel connection LED flow equalizing circuit of motor-driven system according to claim 2, which is characterized in that each inductance
Inductance value it is equal.
4. the parallel connection LED flow equalizing circuit of motor-driven system according to claim 1, which is characterized in that the motor drives
Dynamic circuit includes a Pulse width modulation module, and it is defeated that the Pulse width modulation module is configured to pass first driving end
A pulse width modulating signal as first driving signal out.
5. the parallel connection LED flow equalizing circuit of motor-driven system according to claim 4, which is characterized in that the motor drives
The parallel connection LED flow equalizing circuit of dynamic system further includes a motor sub-assembly, and the motor sub-assembly is connected to the motor drive circuit
One second driving end, the Pulse width modulation module are configured to pass second driving end output as one second driving
Another pulse width modulating signal of signal, to drive the motor sub-assembly.
6. the parallel connection LED flow equalizing circuit of motor-driven system according to claim 1, which is characterized in that the switching group
Part is metal oxide semiconductcor field effect transistor.
7. a kind of parallel connection LED flow equalizing circuit, which is characterized in that the parallel connection LED flow equalizing circuit includes:
At least two LED circuits are connected in parallel to each other, and each LED circuit includes a light emitting diode and connects with the light emitting diode
One flow component, and described one end for flowing component is connected to the cathode of the light emitting diode；
One input power is connected to the anode of each light emitting diode；
One switch block, a first end of the switch block are connected to each other end for flowing component, the switching group
One second end of part is grounded；And
One diode, one end of the diode are connected to the input power, and the other end of the diode is connected to described
The first end of switch block and it is in parallel at least two LED circuits,
Wherein, a control terminal of the switch block is for receiving one first driving signal.
8. parallel connection LED flow equalizing circuit according to claim 7, which is characterized in that each stream component is inductance value phase
Deng inductance.
9. parallel connection LED flow equalizing circuit according to claim 7, which is characterized in that first driving signal is a pulse
Bandwidth modulation signals.
10. parallel connection LED flow equalizing circuit according to claim 7, which is characterized in that the switch block is metal oxide
Semiconductcor field effect transistor (MOSFET).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317661.5A CN110381624A (en) | 2018-04-10 | 2018-04-10 | The parallel connection LED flow equalizing circuit of motor-driven system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810317661.5A CN110381624A (en) | 2018-04-10 | 2018-04-10 | The parallel connection LED flow equalizing circuit of motor-driven system |
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| CN110381624A true CN110381624A (en) | 2019-10-25 |
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| CN201810317661.5A Pending CN110381624A (en) | 2018-04-10 | 2018-04-10 | The parallel connection LED flow equalizing circuit of motor-driven system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201966857U (en) * | 2010-11-23 | 2011-09-07 | 洪小平 | Direct current motor revolving speed control device for oil-fume extractor |
| CN202818721U (en) * | 2012-09-20 | 2013-03-20 | 江苏利通电子有限公司 | Current-equalized BUCK constant-current LED driver circuit by using current transformer |
| US20140042933A1 (en) * | 2012-03-05 | 2014-02-13 | Luxera, Inc. | Apparatus and Method for Dimming Signal Generation for a Distributed Solid State Lighting System |
| CN205356741U (en) * | 2015-12-31 | 2016-06-29 | 深圳Tcl数字技术有限公司 | Multichannel constant -current drive circuit and TV set |
| CN208479984U (en) * | 2018-04-10 | 2019-02-05 | 大青节能科技股份有限公司 | The parallel connection LED flow equalizing circuit of motor-driven system |
-
2018
- 2018-04-10 CN CN201810317661.5A patent/CN110381624A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201966857U (en) * | 2010-11-23 | 2011-09-07 | 洪小平 | Direct current motor revolving speed control device for oil-fume extractor |
| US20140042933A1 (en) * | 2012-03-05 | 2014-02-13 | Luxera, Inc. | Apparatus and Method for Dimming Signal Generation for a Distributed Solid State Lighting System |
| CN202818721U (en) * | 2012-09-20 | 2013-03-20 | 江苏利通电子有限公司 | Current-equalized BUCK constant-current LED driver circuit by using current transformer |
| CN205356741U (en) * | 2015-12-31 | 2016-06-29 | 深圳Tcl数字技术有限公司 | Multichannel constant -current drive circuit and TV set |
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Application publication date: 20191025 |