CN107612313A - The electric supply installation and its collocation method of DC fan, electric power system - Google Patents
The electric supply installation and its collocation method of DC fan, electric power system Download PDFInfo
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Abstract
The invention discloses a kind of electric supply installation of DC fan and its collocation method, electric power system.Wherein, the electric supply installation includes：Mos drive circuits, input connection pwm control signal, output end are used to control output voltage；Cuk chopper circuits, input are connected with the output end of mos drive circuits, for making the voltage that cuk chopper circuits export opposite with the voltage for inputting cuk chopper circuits；Current detection circuit, the output end of cuk chopper circuits is connected to, for detecting the output current of electric supply installation；Voltage detecting circuit, the output end of cuk chopper circuits is connected to, for detecting the output voltage of electric supply installation；The control circuit of electric supply installation, it is connected with mos drive circuits, and be connected with current detection circuit and voltage detecting circuit, for generating pwm control signal according to the magnitude of voltage and current value that detect, to utilize the voltage and power of pwm control signal control electric supply installation output.The present invention solves blower fan and the unmatched technical problem of DC power-supply system.
Description
Technical field
The present invention relates to circuit field, electric supply installation and its collocation method in particular to a kind of DC fan, confession
Electric system.
Background technology
In recent years, the DC fan species of different voltage/current standards is more and more, and industry, the people are used in by extensive
With etc. air-cooled field, it possesses the advantages that supply district selection is broad, control is simple, cost-effective.It is but in actual applications, special
It is not the occasion for needing to change the blower fan of different capacity grade or need multiple blower fans to cooperate, it has to be its more commutation
Answer the power supply of power grade or special power supply is configured for each blower fan；In addition, in different DC power-supply systems, system
DC distribution amplitude be also not quite similar, will so be significantly increased project cost, reduce product competition advantage.
In order to tackle the problem, usually through the output end that two to three common voltage grades are pre-set in one block of power supply
Mouthful solve, although such a mode solves common voltage grade blower fan replacement problem, but need to largely be used for same system
During the blower fan, the waste of unused voltage class output port resource will be effectively caused；For different capacity grade blower fan then
Only corresponding power supply is adapted to for it；And the DC distribution amplitude for system the problem of being not quite similar, typically each add
Add the commutator transformer of matching, not only increase cost, and security risk increases.
For it is above-mentioned the problem of, not yet propose effective solution at present.
The content of the invention
The embodiments of the invention provide a kind of electric supply installation of DC fan and its collocation method, electric power system, with least
Solve blower fan and the unmatched technical problem of DC power-supply system.
One side according to embodiments of the present invention, there is provided a kind of electric supply installation of DC fan, including：Mos drives
Circuit, input connection pwm control signal, output end are used to control output voltage；Cuk chopper circuits, input and the mos
The output end of drive circuit is connected, for making the voltage of the cuk chopper circuits output with inputting the cuk chopper circuits
Voltage is opposite；Current detection circuit, the output end of the cuk chopper circuits is connected to, for detecting the defeated of the electric supply installation
Go out electric current；Voltage detecting circuit, the output end of the cuk chopper circuits is connected to, for detecting the output of the electric supply installation
Voltage；The control circuit of the electric supply installation, be connected with the mos drive circuits, and with the current detection circuit and institute
State voltage detecting circuit to be connected, for generating pwm control signal according to the magnitude of voltage and current value that detect, with described in utilization
Pwm control signal controls the voltage and power of the electric supply installation output.
Alternatively, the mos drive circuits include：Resistance R5, first end connect the pwm control signal；Resistance R1, the
One end connects power supply；Optocoupler T1, including light emitting diode and light-emitting diode, the positive pole of the light emitting diode connect the electricity
Hinder R5 the second end, the negative pole ground connection of the light emitting diode, the negative pole of the light-emitting diode connects the of the resistance R1
Two ends；Transistor V1, gate pole connect the positive pole of the light-emitting diode, grounded drain, and source electrode connects the light-emitting diode
Negative pole, wherein, the output end of the source electrode of the transistor V1 as the mos drive circuits, it is connected with the cuk chopper circuits
Connect.
Alternatively, the cuk chopper circuits include：Transistor VT, inductance L1, electric capacity C, inductance L2 and diode VD, its
In：The gate pole of the transistor VT is connected with the output end of the mos drive circuits, the source electrode of the transistor and the electricity
Sense L1 the second end is connected, and is connected with the first end of the electric capacity C, the drain electrode of the transistor and the diode VD
Negative pole be connected, the second end of the electric capacity C is connected with the positive pole of the diode VD, the inductance L2 and the electric capacity
C connects.
Alternatively, anode interface of the first end of the inductance L1 as input interface, the gate pole of the transistor VT are made
For the negative pole interface of the input interface.
Alternatively, the current detection circuit includes：Current sensor, connected with the inductance L2；Resistance R2, it is and described
Current sensor is in parallel, and output end of the one end of the resistance R2 as current detection signal, other end ground connection.
Alternatively, the voltage detecting circuit includes：Voltage sensor, for detecting the output electricity of the electric supply installation
Pressure；The resistance R3 of series connection and resistance R4, the resistance R3 one end connect the voltage sensor, and other end connects the electricity
R4 first end, the second end ground connection of the resistance R4 are hindered, also, the first end of the resistance R4 is as voltage detection signal
Output end.
Alternatively, anode interface of the one end of the voltage sensor as the output interface of the electric supply installation, in addition
Negative pole interface of the one end as the output interface.
Alternatively, the anode interface of output interface of the negative pole of the diode VD as the electric supply installation, the electricity
Sense L2 first end is connected with the positive pole of the diode VD, and the second end of the inductance L2 is as the negative of the output interface
Pole interface.
Alternatively, the control circuit of the electric supply installation includes：Communication interface, for receiving control instruction, the control
Instruct the parameter for indicating the setting control circuit.
Alternatively, the control circuit of the electric supply installation also includes：Control interface, it is connected with the control circuit of DC fan
Connect.
Another aspect according to embodiments of the present invention, additionally provide a kind of electric power system of DC fan, including above-mentioned one
The electric supply installation of individual or multiple DC fans.
Another aspect according to embodiments of the present invention, a kind of collocation method of the electric supply installation of DC fan is additionally provided,
Characterized in that, the collocation method includes：Obtain the rated power of direct-flow distribution system and the power of the electric supply installation；Root
The quantity of the electric supply installation is determined according to the power of the rated power and the electric supply installation；Match somebody with somebody for the direct-flow distribution system
Put the electric supply installation of the quantity, wherein, the general power and total voltage of the electric supply installation of the quantity of configuration with
The direct-flow distribution system matches.
Alternatively, the quantity bag of the electric supply installation is determined according to the power of the rated power and the electric supply installation
Include：When the electric supply installation is the quantity, whether the output current of the electric supply installation is less than the electric supply installation for detection
Maximum output current, and the electric supply installation input current whether be less than the electric supply installation maximum input current；
It is determined that the output current of the electric supply installation is more than the maximum output current of the electric supply installation, or the electric supply installation
Input current is more than the maximum input current of the electric supply installation, then adjusts the quantity of the electric supply installation.
Alternatively, determined according to the power of the rated power and the electric supply installation electric supply installation quantity it
Afterwards, methods described also includes：According to the nominal input voltage of DC fan and the nominal input voltage of the direct-flow distribution system
Determine dutycycle；Pwm control signal is generated according to the dutycycle.
In embodiments of the present invention, the control circuit of electric supply installation generates PWM according to the magnitude of voltage and current value detected
Control signal, so as to control the voltage and power that electric supply installation exports, to match different DC power-supply systems, so as to solve
The voltage of electric supply installation output or power and the unmatched technical problem of DC power-supply system in the prior art, having reached makes confession
The technique effect that electric installation matches with DC power-supply system.Simultaneously as the defeated of different voltage class need not be pre-set
The output port of exit port and different capacity grade, it can thus be avoided the waste of output port, reduces cost and increase
The stability and reliability of system.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structured flowchart of the electric supply installation of DC fan according to embodiments of the present invention；
Fig. 2 is the schematic diagram of standard cell circuit according to embodiments of the present invention；
Fig. 3 is the circuit diagram of electric supply installation according to embodiments of the present invention；
Fig. 4 is the method flow diagram of configuration electric supply installation according to embodiments of the present invention；
Fig. 5 is the method flow diagram of configuration electric supply installation according to the preferred embodiment of the invention.
Embodiment
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, it should all belong to the model that the present invention protects
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Data can exchange in the appropriate case, so as to embodiments of the invention described herein can with except illustrating herein or
Order beyond those of description is implemented.In addition, term " comprising " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, be not necessarily limited to for example, containing the process of series of steps or unit, method, system, product or equipment
Those steps or unit clearly listed, but may include not list clearly or for these processes, method, product
Or the intrinsic other steps of equipment or unit.
The embodiments of the invention provide a kind of electric supply installation of DC fan.
Fig. 1 is the structured flowchart of the electric supply installation of DC fan according to embodiments of the present invention.As shown in figure 1, the direct current
The electric supply installation of blower fan includes：
Mos drive circuits, input connection pwm control signal, output end are used to control output voltage；
Cuk chopper circuits, input are connected with the output end of mos drive circuits, for making the output of cuk chopper circuits
Voltage is opposite with the voltage for inputting cuk chopper circuits；
Current detection circuit, the output end of cuk chopper circuits is connected to, for detecting the output current of electric supply installation；
Voltage detecting circuit, the output end of cuk chopper circuits is connected to, for detecting the output voltage of electric supply installation；
The control circuit of electric supply installation, be connected with mos drive circuits, and with current detection circuit and voltage detecting circuit
It is connected, for generating pwm control signal according to the magnitude of voltage and current value that detect, to utilize the pwm control signal control
Make the voltage and power of the electric supply installation output.
The mos drive circuits, cuk chopper circuits, current detection circuit and voltage detecting circuit of the present embodiment form Fig. 1 institutes
The blocking criteria element circuit shown, the control circuit of electric supply installation can be with Fig. 1 modularization control circuit.The electric supply installation
Control circuit can be DSP Processor.The control circuit generation pwm signal of electric supply installation, which exports, gives mos drive circuits.
In the present embodiment, the control circuit of electric supply installation is according to magnitude of voltage and current value the generation PWM controls detected
Signal, it is existing so as to solve to match different DC power-supply systems so as to control the voltage and power that electric supply installation exports
Voltage or power and the unmatched technical problem of DC power-supply system that electric supply installation exports in technology, having reached fills power supply
Put the technique effect to match with DC power-supply system.Simultaneously as the output end of different voltage class need not be pre-set
Mouthful and different capacity grade output port, it can thus be avoided the waste of output port, reduce cost and add and be
The stability and reliability of system.
As shown in figure 1, the modularization control circuit can also include communication interface, for receiving control instruction, control refers to
Make the parameter for indicating setting control circuit.The communication interface can include 485 communication interfaces, CAN communication interface and UART
Communication interface.Communicated by these interfaces with the control circuit of electric supply installation, to set the parameter of the control circuit, with
Electric supply installation output current and voltage is set to match with DC power-supply system.
Alternatively, as shown in figure 1, the control circuit of electric supply installation also includes：Control interface, the control electricity with DC fan
Road is connected.The control interface can be controlled by the control circuit of DC fan to DC fan.
The blocking criteria element circuit structured flowchart of the embodiment of the present invention is as shown in Fig. 2 the standard cell circuit includes
MOS drive circuit, Cuk chopper circuits, signal acquisition circuit (voltage detecting circuit and current detection circuit), and MOS is driven
Circuit, Cuk chopper circuits, voltage detecting circuit and current detection circuit are concentrated on one piece of circuit board, set the input of standard
Output interface, including：Pwm control signal input, direct-flow distribution system input, Cuk chopper circuits output end, voltage/electricity
Flow detection signal output end.In this way, building up for the supports such as copper post can be taken according to application scenario and the modular circuit quantity needed
Formula is installed and the inserting of buckle-type, or even to be encapsulated in a good, compact-sized box of radiating independent as one
Product.
Fig. 3 is the circuit diagram of electric supply installation according to embodiments of the present invention.Standard list below in conjunction with Fig. 3 to the present embodiment
First circuit illustrates.
As shown in figure 3, mos drive circuits include：Resistance R5, first end connection pwm control signal；Resistance R1, first end
Connect power supply；Optocoupler T1, including light emitting diode and light-emitting diode, the second of the positive pole connection resistance R5 of light emitting diode
End, the negative pole ground connection of light emitting diode, the negative pole connection resistance R1 of light-emitting diode the second end；Transistor V1, gate pole connection
The positive pole of light-emitting diode, grounded drain, source electrode connect the negative pole of light-emitting diode, wherein, transistor V1 source electrode is as mos
The output end of drive circuit, it is connected with cuk chopper circuits.
I.e. drive circuit includes current-limiting resistance R1, resistance R5, optocoupler T1, transistor V1, and pwm signal is defeated by PWMX ports
Enter, when pwm signal is high level, optocoupler T1 triggering transistor V1 conductings, then the signal that VT gate poles receive is high level；When
When pwm signal is low level, optocoupler T1 is stopped, and promotes transistor V1 to turn off, then the signal that VT gate poles receive is low level.
So effective control to output voltage can be realized by the working condition for the Duty ratio control metal-oxide-semiconductor VT for controlling pwm signal
System.
Alternatively, cuk chopper circuits include：Metal-oxide-semiconductor VT, inductance L1, electric capacity C, inductance L2 and diode VD, wherein：MOS
Pipe VT gate pole is connected with the output end of mos drive circuits, and the source electrode of transistor is connected with inductance L1 the second end, and with
Electric capacity C first end is connected, and the drain electrode of transistor is connected with diode VD negative pole, electric capacity C the second end and diode
VD positive pole is connected, and inductance L2 connects with electric capacity C.
Anode interface of the inductance L1 first end as input interface, the negative pole of metal-oxide-semiconductor VT gate pole as input interface
Interface.
When metal-oxide-semiconductor VT is in the conduction state, Uz-L1-VT loops and Ub-L2-C-VT loops respectively flow through electric current；When
When metal-oxide-semiconductor VT is off, Uz-L1-C-VD loops and Ub-L2-VD loops respectively flow through electric current, and cuk chopper circuits make
The polarity of output voltage is opposite with source voltage polarity.If the time in the conduction state metal-oxide-semiconductor VT is ton, in disconnection shape
The time of state is that 2 average voltages of toff, electric capacity C or so are respectively Ucl and Ucr；Then Ucl=toff*Uc/T；Again because of electricity
The average voltage for feeling L1 is zero, so Uz=Ucl=toff*Uc/T.On the other hand, Ucr=-ton*Uc/T, and L2 electricity
It is zero to flatten average, then Ub=ton*Uc/T；Namely output voltage Ub and supply voltage Uz relation are：Ub=ton*Uz/
Toff=ton*Uz/ (T-ton)=a*Uz/ (1-a).
Alternatively, current detection circuit includes：Current sensor, connected with inductance L2；Resistance R2, with current sensor simultaneously
Connection, and output end of the resistance R2 one end as current detection signal, other end ground connection.
As shown in figure 3, current detection circuit by a current sensor A (current mode, output 4 arrive 20mA normalized currents) and
One sampling resistor R2 composition, the signal Ui=R2*I of ADCX ports output, wherein I is current output sensor.
Alternatively, voltage detecting circuit includes：Voltage sensor, for detecting the output voltage of electric supply installation；Series connection
Resistance R3 and resistance R4, resistance R3 one end connection voltage sensor, other end connection resistance R4 first end, resistance R4's
Second end is grounded, also, output end of the resistance R4 first end as voltage detection signal.
As shown in figure 3, voltage detecting circuit by a voltage sensor V (voltage-type, output 0 arrive 10V normalized currents) and
Sampling resistor R4, current-limiting resistance R3 are formed；The signal Uv=Uvs*R4/ (R3+R4) of ADCY ports output；Wherein Uvs is voltage
Sensor output voltage.
Alternatively, anode interface of the one end of voltage sensor as the output interface of electric supply installation, other end conduct
The negative pole interface of output interface.
Alternatively, anode interface of the diode VD negative pole as the output interface of electric supply installation, inductance L2 first end
It is connected with diode VD positive pole, the negative pole interface of inductance L2 the second end as output interface.
Because cuk chopper circuits can allow the voltage of output with supply voltage on the contrary, voltage sensor detects output
The voltage of interface.Current sensor is arranged on the circuit of output interface, can detect the electric current of output interface.
The embodiment of the present invention additionally provides a kind of electric power system of DC fan.The electric power system of the DC fan can answer
With the electric supply installation of one or more above-mentioned DC fan.
From above-described embodiment, MOS drive circuit, Cuk chopper circuits, signal acquisition circuit are as a standard block
Circuit modular, its input and output voltage is adjustable, can cooperate with or work independently between standard cell circuit module, and can root
Addition is required according to different capacity or reduces the quantity of standard block element circuit, and combination installation form is various, and will control electricity
A standard package is made on road, realizes a kind of simple, efficient, inexpensive, multi-functional intelligent power supply.
The embodiment of the present invention additionally provides a kind of collocation method of the electric supply installation of DC fan.
Fig. 4 is the method flow diagram of configuration electric supply installation according to embodiments of the present invention.Below in conjunction with Fig. 4 to the present embodiment
Configuration electric supply installation is illustrated.
As shown in figure 4, this method comprises the following steps：
S402, obtain the rated power of direct-flow distribution system and the power of electric supply installation；
S404, the quantity of electric supply installation is determined according to the power of rated power and electric supply installation；
S406, the electric supply installation of quantity is configured for direct-flow distribution system, wherein, the total work of the electric supply installation of the quantity of configuration
Rate and total voltage match with direct-flow distribution system.
The rated power and rated voltage of direct-flow distribution system must be determined first, and it is the specified of direct-flow distribution system to define Pt
Power, define the rated voltage that Ut is direct-flow distribution system；The input voltage of electric supply installation is determined, is defined as Uz；It is determined that for
Electric installation output voltage, Ub is defined as, then has Ub=Ut；Total input current of electric supply installation is calculated, is defined as Iz, then Iz
=Pt/Uz；Total output current of electric supply installation is calculated, is defined as Io, then Io=Pt/Ut；The quantity of electric supply installation is determined, it is fixed
It is CS to justice, and the power for defining single electric supply installation is Pm, then CS=Pt/Pm, CS round up, if CS=3.5 is calculated,
Then take CS=4.
Secondly, understood with reference to figure 5, after the quantity of determining unit module, exactly check the input and output electricity of electric supply installation
Whether stream meets demand, and the specified maximum input current for defining monolithic electric supply installation is In, maximum output current Ix, it is desirable to
Iz/CS is less than In, and Io/CS is less than Ix, if not satisfied, then needing to adjust CS value (quantity of increase electric supply installation).That is, according to volume
The power for determining power and electric supply installation determines that the quantity of electric supply installation includes：Detection is when electric supply installation is quantity, electric supply installation
Output current whether be less than electric supply installation maximum output current, and electric supply installation input current whether be less than power supply dress
The maximum input current put；It is determined that the output current of electric supply installation is more than the maximum output current of electric supply installation, or power supply
The input current of device is more than the maximum input current of electric supply installation, then adjusts the quantity of electric supply installation.
It is exactly finally to configure duty cycle parameters, definition dutycycle is a, then can be obtained according to formula Ut=a*Uz/ (1-a)
, undated parameter confirms whether input and output meet actual demand.That is, determined according to the power of rated power and electric supply installation
After the quantity of electric supply installation, method also includes：According to the specified of the nominal input voltage of DC fan and direct-flow distribution system
Input voltage determines dutycycle；Pwm control signal is generated according to dutycycle.
The configuration process for illustrating the electric supply installation of the present embodiment is as follows：
In the embodiment of the present invention, electric supply installation can be made to the unit module that power output is 200W, maximum input electricity
Flow for 10A, maximum input voltage 650V；Maximum output current 20A, maximum output voltage 450V；Namely monolithic unit module
Input voltage adjustable extent is 20V to 650V, and output voltage range is 10V to 450V.
In actual use, it is first determined load the rated power and nominal input voltage of blower fan, it is assumed that its rated power
For 500W, nominal input voltage 110V, primarily determining that needs 3 module unit modules, then the rated output electricity of each unit module
Press as 110V, output-current rating 4.5A, monolithic unit module rated output voltage is 110V, output-current rating is
1.5A, meet that individual unit module maximum output current is less than 20A requirement.
Direct-flow distribution system input voltage is determined again, it is assumed that is 310V, then total input current of 3 unit modules is
1.62A, the specified input current of individual unit module is 0.532A, meets that monoblock modules maximum input current is wanted less than 10A
Ask, hence, it can be determined that being cooperated using 3 module unit circuit modules.
Again by 485 communications/CAN communication/UART communicate any one mode set voltage detecting feed back fiducial value as
110V, MOS drive circuit PWM control signal duty cycle a are arranged to 26.2% according to formula U0=a*E/ (1-a), wherein, U0 is
Blower fan nominal input voltage, E are stream distribution system input voltage, and current detection feedback value is then believed with the control of draught fan control circuit
Number match and run real-time update with control program.
Similarly, to the blower fan of same power grade difference voltage class, such as by rated power 50W, input voltage 110V
Blower fan replace with the blower fan that equal-wattage grade but nominal input voltage are 48V, by power conversion formula P=U*I, (P is
Power, U are rated voltage, I is rated current) it can obtain in the case of rated voltage 48V, rated power 50W, power module
Output current is 1.042A (meeting that individual unit module maximum output current is less than 20A requirement), ibid MOS drive circuit
PWM control signal duty cycle a computational methods can obtain, a=50% before replacing, a=30.38% after replacing；Namely in the case,
Only need one piece of standardized module and only need to adjust the i.e. achievable blower fan replacing with power grade difference voltage class of dutycycle.It is right
In the situation for needing multiple unit modules to cooperate, it is installed generally with other circuits using copper post support, nut check
Mode, or the stacked installation of drawer of opposite side neck.Can so match blower fan power and nominal input voltage/electric current,
System dc power distribution system voltage, realize the situation that is intelligent modularized and being not in idle module of DC fan power supply.
In the above embodiment of the present invention, the description to each embodiment all emphasizes particularly on different fields, and does not have in some embodiment
The part of detailed description, it may refer to the associated description of other embodiment.
In several embodiments provided herein, it should be understood that disclosed technology contents, others can be passed through
Mode is realized.Wherein, device embodiment described above is only schematical, such as the division of the unit, Ke Yiwei
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling or direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, unit or module
Connect, can be electrical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On unit.Some or all of unit therein can be selected to realize the purpose of this embodiment scheme according to the actual needs.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to be contributed in other words to prior art or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are causing a computer
Equipment (can be personal computer, server or network equipment etc.) perform each embodiment methods described of the present invention whole or
Part steps.And foregoing storage medium includes：USB flash disk, read-only storage (ROM, Read-Only Memory), arbitrary access are deposited
Reservoir (RAM, Random Access Memory), mobile hard disk, magnetic disc or CD etc. are various can be with store program codes
Medium.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (14)
- A kind of 1. electric supply installation of DC fan, it is characterised in that including：Mos drive circuits, input connection pwm control signal, output end are used to control output voltage；Cuk chopper circuits, input are connected with the output end of the mos drive circuits, for making the cuk chopper circuits defeated The voltage gone out is opposite with the voltage for inputting the cuk chopper circuits；Current detection circuit, the output end of the cuk chopper circuits is connected to, for detecting the output electricity of the electric supply installation Stream；Voltage detecting circuit, the output end of the cuk chopper circuits is connected to, for detecting the output electricity of the electric supply installation Pressure；The control circuit of the electric supply installation, be connected with the mos drive circuits, and with the current detection circuit and described Voltage detecting circuit is connected, for generating pwm control signal according to the magnitude of voltage and current value that detect, with described in utilization Pwm control signal controls the voltage and power of the electric supply installation output.
- 2. electric supply installation according to claim 1, it is characterised in that the mos drive circuits include：Resistance R5, first end connect the pwm control signal；Resistance R1, first end connection power supply；Optocoupler T1, including light emitting diode and light-emitting diode, the positive pole of the light emitting diode connect the of the resistance R5 Two ends, the negative pole ground connection of the light emitting diode, the negative pole of the light-emitting diode connect the second end of the resistance R1；Transistor V1, gate pole connect the positive pole of the light-emitting diode, grounded drain, and source electrode connects the negative of the light-emitting diode Pole,Wherein, output end of the source electrode of the transistor V1 as the mos drive circuits, it is connected with the cuk chopper circuits Connect.
- 3. electric supply installation according to claim 1, it is characterised in that the cuk chopper circuits include：Transistor VT, inductance L1, electric capacity C, inductance L2 and diode VD, wherein：The gate pole of the transistor VT is connected with the output end of the mos drive circuits, the source electrode of the transistor with it is described Inductance L1 the second end is connected, and is connected with the first end of the electric capacity C, the drain electrode of the transistor and the diode VD negative pole is connected, and the second end of the electric capacity C is connected with the positive pole of the diode VD, the inductance L2 and the electricity Hold C series connection.
- 4. electric supply installation according to claim 3, it is characterised in that the first end of the inductance L1 is as input interface Anode interface, the negative pole interface of the gate pole of the transistor VT as the input interface.
- 5. electric supply installation according to claim 3, it is characterised in that the current detection circuit includes：Current sensor, connected with the inductance L2；Resistance R2, it is in parallel with the current sensor, and output end of the one end of the resistance R2 as current detection signal, Other end is grounded.
- 6. electric supply installation according to claim 5, it is characterised in that the voltage detecting circuit includes：Voltage sensor, for detecting the output voltage of the electric supply installation；The resistance R3 of series connection and resistance R4, the resistance R3 one end connect the voltage sensor, described in other end connection Resistance R4 first end, the second end ground connection of the resistance R4, also, the first end of the resistance R4 is as voltage detection signal Output end.
- 7. electric supply installation according to claim 6, it is characterised in that one end of the voltage sensor is as the power supply The anode interface of the output interface of device, negative pole interface of the other end as the output interface.
- 8. electric supply installation according to claim 3, it is characterised in that the negative pole of the diode VD is as the power supply dress The anode interface for the output interface put, the first end of the inductance L2 are connected with the positive pole of the diode VD, the inductance Negative pole interface of L2 the second end as the output interface.
- 9. electric supply installation according to claim 1, it is characterised in that the control circuit of the electric supply installation includes：Communication interface, for receiving control instruction, the control instruction is used to indicate the parameter for setting the control circuit.
- 10. electric supply installation according to claim 1, it is characterised in that the control circuit of the electric supply installation also includes：Control interface, it is connected with the control circuit of DC fan.
- 11. a kind of electric power system of DC fan, it is characterised in that including any one of one or more claim 1-10 The electric supply installation of described DC fan.
- 12. a kind of collocation method of the electric supply installation of DC fan, it is characterised in that for any one of claim 1-10 Described electric supply installation is configured, and the collocation method includes：Obtain the rated power of direct-flow distribution system and the power of the electric supply installation；The quantity of the electric supply installation is determined according to the power of the rated power and the electric supply installation；The electric supply installation of the quantity is configured for the direct-flow distribution system, wherein, the confession of the quantity of configuration The general power and total voltage of electric installation match with the direct-flow distribution system.
- 13. collocation method according to claim 12, it is characterised in that according to the rated power and the electric supply installation Power determine that the quantity of the electric supply installation includes：When the electric supply installation is the quantity, whether the output current of the electric supply installation is less than the electric supply installation for detection Maximum output current, and the electric supply installation input current whether be less than the electric supply installation maximum input current；It is determined that the output current of the electric supply installation is more than the maximum output current of the electric supply installation, or the power supply dress The input current put is more than the maximum input current of the electric supply installation, then adjusts the quantity of the electric supply installation.
- 14. collocation method according to claim 12, it is characterised in that filled according to the rated power and the power supply After the power put determines the quantity of the electric supply installation, methods described also includes：Dutycycle is determined according to the nominal input voltage of the nominal input voltage of DC fan and the direct-flow distribution system；Pwm control signal is generated according to the dutycycle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710793185.XA CN107612313A (en) | 2017-09-04 | 2017-09-04 | The electric supply installation and its collocation method of DC fan, electric power system |
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| CN201710793185.XA CN107612313A (en) | 2017-09-04 | 2017-09-04 | The electric supply installation and its collocation method of DC fan, electric power system |
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Cited By (1)
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| CN109638806A (en) * | 2019-01-21 | 2019-04-16 | 深圳供电局有限公司 | Direct-flow distribution system |
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Application publication date: 20180119 |