CN209447016U - A kind of switching power circuit and frequency-variable air conditioner outdoor machine - Google Patents
A kind of switching power circuit and frequency-variable air conditioner outdoor machine Download PDFInfo
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- CN209447016U CN209447016U CN201920415439.9U CN201920415439U CN209447016U CN 209447016 U CN209447016 U CN 209447016U CN 201920415439 U CN201920415439 U CN 201920415439U CN 209447016 U CN209447016 U CN 209447016U
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Abstract
The utility model provides a kind of switching power circuit and frequency-variable air conditioner outdoor machine, the circuit includes power supply control chip, include differential mode inductance, electrolytic capacitor and rectifier diode output buck filter circuit, and corresponds at least one linear voltage-stabilizing circuit of at least one the second DC low-voltage；Power supply control chip inputs high voltage direct current, DC voltage copped wave is formed alternating voltage, and export alternating current；Output buck filter circuit input power controls the alternating current of chip output, and using the first DC low-voltage as output voltage；Each linear voltage-stabilizing circuit is using the first DC low-voltage as input voltage, and using itself corresponding second DC low-voltage as output voltage, and the voltage value of any second DC low-voltage is respectively less than the voltage value of the first DC low-voltage.The utility model uses in such a way that single sense, simplex winding export and linear voltage-stabilizing circuit is matched, and the output of Lai Shixian multi-channel DC low pressure, there is no influence each other between Multiple coil.
Description
Technical field
The utility model relates to electronic technology field, in particular to a kind of switching power circuit and frequency-variable air conditioner outdoor machine.
Background technique
The exportable multichannel different voltages of switching power circuit in equipment, to support a variety of power demands.
Equipment governor circuit is mostly non-isolated circuit currently on the market, and power switch power module mostly uses greatly AC
(Alternating Current, alternating current)-DC (Direct Current, direct current) inverse-excitation type (Flyback) framework.Than
Such as, the switching power circuit of frequency-variable air conditioner outdoor machine uses this framework, and design of transformer is separated from each other using Multiple coil
Formula winding technique realizes independent output potential point in a manner of electromagnetic coupling between winding.
But can exist between winding and winding and influence each other.
Utility model content
The utility model provides a kind of switching power circuit and frequency-variable air conditioner outdoor machine, and there is no mutual shadows between Multiple coil
Loud problem.
On the one hand, the utility model provides a kind of switching power circuit, comprising:
Power supply control chip, output buck filter circuit and at least one linear voltage-stabilizing circuit；
Wherein, the output buck filter circuit includes: the first differential mode inductance, the first electrolytic capacitor and the first two poles of rectification
Pipe；
Wherein, the first end of first differential mode inductance is connected with the power supply control chip, first differential mode inductance
Second termination the first DC low-voltage；
The first end of first electrolytic capacitor is connected with the second end of first differential mode inductance, the first electrolysis electricity
The second end of appearance is grounded；
The plus earth of first rectifier diode, the cathode of first rectifier diode and first differential mode electricity
The first end of sense is connected；
Described at least one linear voltage-stabilizing circuit is corresponded at least one the second DC low-voltage, and any described second
The voltage value of DC low-voltage is respectively less than the voltage value of first DC low-voltage；
The first end of each linear voltage-stabilizing circuit is connected with the second end of first differential mode inductance, each
The second end of the linear voltage-stabilizing circuit is connected to corresponding second DC low-voltage of body；
DC voltage copped wave is formed alternating voltage, and export for inputting high voltage direct current by the power supply control chip
Alternating current；
The output buck filter circuit, for inputting the alternating current of power supply control chip output, and with described the
One DC low-voltage is output voltage；
Each described linear voltage-stabilizing circuit is used to using first DC low-voltage as input voltage, and right with itself
The second DC low-voltage answered is output voltage.
Further, switching power circuit further include: filter circuit；
Wherein, the filter circuit includes: the second differential mode inductance, the second electrolytic capacitor and third electrolytic capacitor；
Wherein, the first end of second differential mode inductance is connected with external high voltage direct current electrical input, and described second is poor
The second end of mould inductance is connected with the power supply control chip；
The first end of second electrolytic capacitor is connected with the second end of second differential mode inductance, the second electrolysis electricity
The second end of appearance is grounded；
The first end of the third electrolytic capacitor is connected with the first end of second differential mode inductance, the third electrolysis electricity
The second end of appearance is grounded.
Further, switching power circuit further include: boostrap circuit；
Wherein, the boostrap circuit includes: the second rectifier diode, third rectifier diode, the 4th electrolytic capacitor and
Five electrolytic capacitors；
Wherein, the anode of second rectifier diode is connected with the second end of first differential mode inductance；
The anode of the third rectifier diode is connected with the cathode of second rectifier diode；
The first end of 4th electrolytic capacitor is connected with the cathode of second rectifier diode, the 4th electrolysis electricity
The second end of appearance is connected with the first end of first differential mode inductance；
The first end of 5th electrolytic capacitor is connected with the cathode of the third rectifier diode, the 5th electrolysis electricity
The second end of appearance is connected with the first end of first differential mode inductance.
Further, switching power circuit further include: feed circuit；
Wherein, the feed circuit includes: ceramic condenser, the first glass glaze film resistance, the second glass glaze film resistance, third
Glass glaze film resistance；
Wherein, the first end of the first glass glaze film resistance is connected with the cathode of second rectifier diode, described
The second end of first glass glaze film resistance is connected with the power supply control chip；
The first end of the second glass glaze film resistance is connected with the second end of the first glass glaze film resistance, and described
The second end of two glass glaze film resistances is connected with the first end of the ceramic condenser；
The first end of the third glass glaze film resistance is connected with the power supply control chip, the third glass glaze film electricity
The second end of resistance is connected with the first end of the ceramic condenser；
The second end of the ceramic condenser is connected with the power supply control chip.
Further, the linear voltage-stabilizing circuit, comprising: first resistor, triode, voltage-stabiliser tube, the 4th rectifier diode,
6th electrolytic capacitor；
Wherein, the first end of the first resistor is connected with the second end of first differential mode inductance, the first resistor
Second end be connected with the base stage of the triode；
The collector of the triode is connected with the second end of first differential mode inductance；
The cathode of the voltage-stabiliser tube is connected with the base stage of the triode, the plus earth of the voltage-stabiliser tube；
The first end of 4th rectifier diode is connected with the transmitter of the triode, the 4th rectifier diode
Second termination one second output voltage；
The first end of 6th electrolytic capacitor is connected with the second end of the 4th rectifier diode, the 6th electrolysis
The second end of capacitor is grounded.
Further, different linear voltage-stabilizing circuits connect the voltage value difference of the second DC low-voltage.
Further, first DC low-voltage is 15V；
At least one described second DC low-voltage includes 12V and 5V.
Further, first electrolytic capacitor is an alminium electrolytic condenser；
First rectifier diode is semiconductor rectifier diode.
Further, the power supply control chip includes: NCP1 chip.
On the other hand, the utility model provides a kind of frequency-variable air conditioner outdoor machine, comprising: any of the above-described switch electricity
Source circuit.
The utility model provides a kind of switching power circuit and frequency-variable air conditioner outdoor machine, which includes power supply control core
Piece includes differential mode inductance, electrolytic capacitor and rectifier diode output buck filter circuit, and corresponds at least one
At least one linear voltage-stabilizing circuit of second DC low-voltage；Power supply control chip inputs high voltage direct current, by DC voltage copped wave
Alternating voltage is formed, and exports alternating current；Output buck filter circuit input power controls the alternating current of chip output, and with the
One DC low-voltage is output voltage；Each linear voltage-stabilizing circuit is and right with itself using the first DC low-voltage as input voltage
The second DC low-voltage answered is output voltage, and the voltage value of any second DC low-voltage is respectively less than the voltage of the first DC low-voltage
Value.The utility model uses in such a way that single sense, simplex winding export and linear voltage-stabilizing circuit is matched, Lai Shixian multi-channel DC low pressure
Output, there is no influence each other between Multiple coil.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram for switching power circuit that the utility model one embodiment provides；
Fig. 2 is the schematic diagram for another switching power circuit that the utility model one embodiment provides.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, it is retouched
The embodiment stated is only the utility model a part of the embodiment, rather than whole embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
As shown in Figure 1, one embodiment of the utility model provides a kind of switching power circuit, comprising:
Power supply control chip 101, output buck filter circuit 102 and at least one linear voltage-stabilizing circuit 103；
Wherein, the output buck filter circuit 102 includes: the first differential mode inductance L1, the first electrolytic capacitor C1 and first
Rectifier diode D1；
Wherein, the first end of the first differential mode inductance L1 is connected with the power supply control chip 101, first differential mode
Second the first DC low-voltage of termination of inductance L1；
The first end of the first electrolytic capacitor C1 is connected with the second end of the first differential mode inductance L1, first electricity
Solve the second end ground connection of capacitor C1；
The plus earth of the first rectifier diode D1, the cathode of the first rectifier diode D1 with it is described first poor
The first end of mould inductance L1 is connected；
Described at least one linear voltage-stabilizing circuit 103 is corresponded at least one the second DC low-voltage, and any described
The voltage value of second DC low-voltage is respectively less than the voltage value of first DC low-voltage；
The first end of each linear voltage-stabilizing circuit 103 is connected with the second end of the first differential mode inductance L1,
The second end of each linear voltage-stabilizing circuit 103 is connected to corresponding second DC low-voltage of body；
DC voltage copped wave is formed alternating voltage for inputting high voltage direct current by the power supply control chip 101, and
Export alternating current；
The output buck filter circuit 102, the alternating current exported for inputting the power supply control chip 101, and with
First DC low-voltage is output voltage；
Each described linear voltage-stabilizing circuit 103, is used to using first DC low-voltage as input voltage, and with itself
Corresponding second DC low-voltage is output voltage.
The utility model embodiment provides a kind of switching power circuit, which includes power supply control chip, includes
Differential mode inductance, electrolytic capacitor and rectifier diode output buck filter circuit, and correspond at least one the second direct current
At least one linear voltage-stabilizing circuit of low pressure；Power supply control chip inputs high voltage direct current, and DC voltage copped wave is formed and is exchanged
Voltage, and export alternating current；Output buck filter circuit input power controls the alternating current of chip output, and low with the first direct current
Pressure is output voltage；Each linear voltage-stabilizing circuit using the first DC low-voltage as input voltage, and with itself corresponding second
DC low-voltage is output voltage, and the voltage value of any second DC low-voltage is respectively less than the voltage value of the first DC low-voltage.This reality
It is used in such a way that single sense, simplex winding export and linear voltage-stabilizing circuit is matched with new embodiment, Lai Shixian multi-channel DC low pressure
Output, there is no influence each other between Multiple coil.
In detail, inductor is the element that electric energy can be converted into magnetic energy and stored.The structure of inductor is similar
In transformer, but only one winding.
In detail, the core component in existing implementation is designed using switch transformer, is mutually divided based on Multiple coil
From formula winding technique, so that independent output potential point is realized between winding in a manner of electromagnetic coupling and is not interfere with each other mutually.With
Existing implementation is different, in the utility model embodiment, switch transformer design is adjusted to single inductor design, using DC/
Non-isolated decompression (Buck) topological structure of DC, based on pulse frequency modulated technology, using inductance in switching process electric current
It can not be mutated and LC lowpass filtering theory, Lai Shixian multi-channel DC low pressure export.
Specifically, the first DC low-voltage is provided by output buck filter circuit first, herein on basis, then passed through
Each linear voltage-stabilizing circuit provides multichannel the second DC low-voltage.In this way, the numerical value of the first DC low-voltage should be greater than any second directly
Flow the numerical value of low pressure.Certainly, based on different practical application requests, the numerical value of different second DC low-voltages can be identical, can also
With difference.
Therefore, in the utility model one embodiment, different linear voltage-stabilizing circuits 103 connect the electricity of the second DC low-voltage
Pressure value is different.
Based on this, in the utility model one embodiment, referring to FIG. 2, first DC low-voltage is 15V；It is described
At least one second DC low-voltage includes 12V and 5V.
In detail, switching power circuit shown in Fig. 2 can be for applied to the Switching Power Supply on frequency-variable air conditioner outdoor machine
Circuit, in this way, therefore there are multichannel different voltages output mode, i.e., respectively export this three roads voltage of 5V, 12V, 15V.Correspond to
Fig. 1, V1=15V, there are two V2, respectively 5V and 12V.
As it can be seen that the utility model embodiment uses in such a way that single sense, simplex winding export and linear voltage-stabilizing circuit is matched, come
Realize the output of multi-channel DC low pressure, thus there is no influencing each other between Multiple coil in existing implementation, such as not
Can exist because leakage inductance is larger between winding and winding, peak-charging effect can be generated on output filter capacitor, is caused under underloading
Load regulation be deteriorated, the problems such as manufacturing cost is higher, while the more circuit layout of skeleton pin is relative complex.
In the utility model embodiment, output buck filter circuit includes L1, D1, C1.By way of AC energy pass through by
After the low-pass filter of L1, C1 composition, stable DC energy (i.e. V1 shown in Fig. 1) is formed.D1 is freewheeling diode shape
At current loop.
In the utility model one embodiment, the first electrolytic capacitor C1 is an alminium electrolytic condenser；
The first rectifier diode D1 is semiconductor rectifier diode.
In the utility model one embodiment, referring to FIG. 2, the switching power circuit further include: filter circuit；
Wherein, the filter circuit includes: the second differential mode inductance L2, the second electrolytic capacitor C2 and third electrolytic capacitor C3；
Wherein, the first end of the second differential mode inductance L2 is connected with external high voltage direct current electrical input, and described second
The second end of differential mode inductance L2 is connected with the power supply control chip 101；
The first end of the second electrolytic capacitor C2 is connected with the second end of the second differential mode inductance L2, second electricity
Solve the second end ground connection of capacitor C2；
The first end of the third electrolytic capacitor C3 is connected with the first end of the second differential mode inductance L2, the third electricity
Solve the second end ground connection of capacitor C3.
Referring to FIG. 2, DC shown in Figure 2 can be for high voltage direct current input terminal.
In the utility model embodiment, filter circuit includes L2, C2, C3.High voltage direct current approach is made of C3, L2, C2
" π " type filter circuit and incoming voltage transformation chance-over circuit.
In the utility model one embodiment, referring to FIG. 2, the switching power circuit further include: boostrap circuit；
Wherein, the boostrap circuit includes: the second rectifier diode D2, third rectifier diode D3, the 4th electrolytic capacitor
C4 and the 5th electrolytic capacitor C5；
Wherein, the anode of the second rectifier diode D2 is connected with the second end of the first differential mode inductance L1；
The anode of the third rectifier diode D3 is connected with the cathode of the second rectifier diode D2；
The first end of the 4th electrolytic capacitor C4 is connected with the cathode of the second rectifier diode D2, the 4th electricity
The second end of solution capacitor C4 is connected with the first end of the first differential mode inductance L1；
The first end of the 5th electrolytic capacitor C5 is connected with the cathode of the third rectifier diode D3, the 5th electricity
The second end of solution capacitor C5 is connected with the first end of the first differential mode inductance L1.
In the utility model embodiment, boostrap circuit includes D2, C4, D3, C5.Boostrap circuit is primarily useful for power supply control
Coremaking piece provides energy.
In detail, referring to FIG. 2, for this boostrap circuit, rectification diode individual event conducting and electricity be can use
The characteristic of capacitor filter, when power supply control chip exports low pressure, 15V voltage is charged by D2 to C4；When power supply control chip is defeated
Out when high pressure, the electric energy of the cut-off of D2 diode negative sense, C4 is charged by D3 to C5, and is powered simultaneously to power supply control chip.
In the utility model one embodiment, referring to FIG. 2, the switching power circuit further include: feed circuit；
Wherein, the feed circuit includes: ceramic condenser C, the first glass glaze film resistance R1, the second glass glaze film resistance
R2, third glass glaze film resistance R3；
Wherein, the first end of the first glass glaze film resistance R1 is connected with the cathode of the second rectifier diode D2,
The second end of the first glass glaze film resistance R1 is connected with the power supply control chip 101；
The first end of the second glass glaze film resistance R2 is connected with the second end of the first glass glaze film resistance R1, institute
The second end for stating the second glass glaze film resistance R2 is connected with the first end of the ceramic condenser C；
The first end of the third glass glaze film resistance R3 is connected with the power supply control chip 101, the third glass
The second end of glaze film resistance R3 is connected with the first end of the ceramic condenser C；
The second end of the ceramic condenser C is connected with the power supply control chip 101.
In the utility model embodiment, feed circuit includes R1, R2, R3, C.It is straight that feed circuit can accurately detect output
Galvanic electricity can situation of change, while synchronous feedback is to power supply control chip, so that power supply control chip can be pressed according to feedback information
It needs to adjust.
In the utility model one embodiment, referring to FIG. 2, the linear voltage-stabilizing circuit 103, comprising: first resistor
R, triode Q, voltage-stabiliser tube D, the 4th rectifier diode D4, the 6th electrolytic capacitor C6；
Wherein, the first end of the first resistor R is connected with the second end of the first differential mode inductance L1, first electricity
The second end of resistance R is connected with the base stage of the triode Q；
The collector of the triode Q is connected with the second end of the first differential mode inductance L1；
The cathode of the voltage-stabiliser tube D is connected with the base stage of the triode Q, the plus earth of the voltage-stabiliser tube D；
The first end of the 4th rectifier diode D4 is connected with the transmitter of the triode Q, the 4th rectification two
The second one second output voltage of termination of pole pipe D4；
The first end of the 6th electrolytic capacitor C6 is connected with the second end of the 4th rectifier diode D4, and the described 6th
The second end of electrolytic capacitor C6 is grounded.
In the utility model embodiment, linear voltage-stabilizing circuit includes R, Q, D, D4, C6.It please refers in Fig. 2 positioned at left side
Linear voltage-stabilizing circuit, 15V DC voltage is depressured by Q and is transformed into DC voltage after D4, then is stablized after being filtered by C6
12V DC voltage.Based on same realization principle, it is straight that the linear voltage-stabilizing circuit in Fig. 2 positioned at right side can obtain stable 5V
Galvanic electricity pressure.
The specific data of the second DC low-voltage as corresponding to two linear voltage-stabilizing circuits are different, this difference can usually lead to
Cross in two circuits of control that equal way is not achieved for the specific data of R.
In the utility model one embodiment, the power supply control chip 101 includes: NCP1 chip.
In detail, switching power circuit can with high-voltage switch gear low-power consumption off-line switching power supply IC (NCP1, such as
It NCP106X) is core.
In detail, NCP1 class integrated chip super-low standby power consumption quasi-resonance primary controller and 650V/700V high snowslide energy
Power intelligent power MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide
Layer semiconductcor field effect transistor), the operating mode switched with two kinds of fixed frequencies of 60KHz and 100KHz；Including soft start, frequency
Shake, short-circuit protection, skip cycle, adjustable peak current set point, harmonic compensation, dynamic self-powered (do not need auxiliary around
Group)；It can seamlessly use in non-isolated and isolated topological structure；Its peak power output 18W, meets convertible frequency air-conditioner driving plate
Power consumption demand.
Based on this, in the utility model one embodiment, power supply control chip is using the position U1 NCP106X chip as core
The heart, built-in switch MOS (metal oxide semiconductor, metal-oxide-semiconductor) pipe and control are integrated
Circuit realizes the switch of circuit by the metal-oxide-semiconductor inside control, and DC voltage copped wave is formed alternating voltage.
Referring to FIG. 2, the power supply control chip in switching power circuit shown in Fig. 2 is using the position U1 NCP1 chip as core.
Based on this, the second end of L2 can connect the Drain pin of the chip in filter circuit, and the cathode of D3 can connect this in boostrap circuit
The VCC pin of chip, the first end of L2 can meet the GND pin of the chip, R3 in feed circuit in output buck filter circuit
First end can connect the LIM/OPP pin of the chip, the second end of C can connect the COMP pin of the chip in feed circuit,
The second end of R1 can connect the FB pin of the chip in feed circuit.
Wherein, Drain represents the drain electrode of internal high pressure MOSFET, and VCC represents chip power, GND represent chip signal with
Power Groud, COMP represent loop compensation point, and FB represents feedback signal sampling end.
In conclusion the utility model embodiment provides a kind of non-isolated voltage-dropping power supply circuit scheme, can be applied to become
In the non-isolated power supply circuit module and its control circuit of frequency air-conditioner outdoor unit.
Therefore, one embodiment of the utility model additionally provides a kind of frequency-variable air conditioner outdoor machine, may include: above-mentioned
Switching power circuit described in one.
In detail, Flyback framework majority control chip is chosen with photoelectrical coupler and three terminal regulator (such as TL431
Three terminal regulator) and its surrounding component composition secondary side feedback circuit control realize stablize export effect.Due to
Switching power circuit in the utility model embodiment does not use switch transformer to design, therefore can save simultaneously and remove the secondary side of its tradition
Feed circuit.In this way, the utility model embodiment is before guaranteeing entire external convertible frequency air conditioner drive system stability and high efficiency performance
It puts, space needed for not only having reduced system fabric swatch but also reduces circuit cost.
In conclusion the utility model embodiment provides a kind of power circuit of novel non-isolated frequency-variable air conditioner outdoor machine
Scheme, the switching Power Supply power supply module circuit structure that can solve most non-isolated external convertible frequency air conditioners currently on the market is complicated,
The problems such as load regulation is poor, electromagnetism interference characteristic is poor, manufacturing cost is higher.
Further, since design scheme described in the utility model embodiment belongs to Highgrade integration scheme, it is same on circuit board
When there are high switching current, high switching voltage and analog signals.In order to guarantee work that power supply can be reliable and stable, in design electricity
When the plate of road, single-point grounding, short distance shunt capacitance, short distance feedback resistance, hot environment heat dissipation reference quantity, low pressure can also be added
The design concepts such as loop area, high voltage electrostatic discharge gap are exported, so that switching power circuit module be made to have low EMI
(Electromagnetic Interference, electromagnetic interference), low noise acoustical coupling, low ripple noise, high safety factor etc. are excellent
Gesture.
In conclusion the embodiments of the present invention have it is at least following the utility model has the advantages that
1, in the utility model embodiment, switching power circuit includes power supply control chip, includes differential mode inductance, electrolysis
Capacitor and rectifier diode output buck filter circuit, and correspond at least one the second DC low-voltage at least one
Linear voltage-stabilizing circuit；Power supply control chip inputs high voltage direct current, DC voltage copped wave is formed alternating voltage, and export exchange
Electricity；Output buck filter circuit input power controls the alternating current of chip output, and using the first DC low-voltage as output voltage；Often
One linear voltage-stabilizing circuit is output electricity with itself corresponding second DC low-voltage using the first DC low-voltage as input voltage
Pressure, and the voltage value of any second DC low-voltage is respectively less than the voltage value of the first DC low-voltage.The utility model embodiment uses
In such a way that single sense, simplex winding export and linear voltage-stabilizing circuit is matched, Multiple coil is not present in the output of Lai Shixian multi-channel DC low pressure
Between the problem of influencing each other.
2, the utility model embodiment uses in such a way that single sense, simplex winding export and linear voltage-stabilizing circuit is matched, comes real
Existing multi-channel DC low pressure output, thus there is no influencing each other between Multiple coil in existing implementation, such as will not
In the presence of because between winding and winding leakage inductance it is larger, peak-charging effect can be generated on output filter capacitor, cause underloading under
The problems such as load regulation is deteriorated, and manufacturing cost is higher, while the more circuit layout of skeleton pin is relative complex.
3, the switching power circuit in the utility model embodiment does not use switch transformer to design, therefore can save and remove simultaneously
Its traditional secondary side feedback circuit.In this way, the utility model embodiment is guaranteeing that it is high that entire external convertible frequency air conditioner drive system is stablized
Under the premise of imitating performance, space needed for not only having reduced system fabric swatch but also circuit cost is reduced.
4, the utility model embodiment provides a kind of power circuit scheme of novel non-isolated frequency-variable air conditioner outdoor machine, can
To solve switching Power Supply power supply module circuit structure complexity, the adjustment of load of most non-isolated external convertible frequency air conditioners currently on the market
The problems such as rate is poor, electromagnetism interference characteristic is poor, manufacturing cost is higher.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment for including a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including a 〃 〃 ", it is not excluded that
There is also other identical factors in the process, method, article or apparatus that includes the element.
Each embodiment provided in the utility model can be combined with each other as needed, such as any two, three
Feature in a or more embodiment is combined with each other to constitute the new embodiment of the utility model, this is also in the utility model
Protection scope in, unless otherwise stated or technically constitute contradiction and can not implement.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to
The utility model, for those skilled in the art, the present invention may have various modifications and changes.It is all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (10)
1. a kind of switching power circuit characterized by comprising
Power supply control chip, output buck filter circuit and at least one linear voltage-stabilizing circuit；
Wherein, the output buck filter circuit includes: the first differential mode inductance, the first electrolytic capacitor and the first rectifier diode；
Wherein, the first end of first differential mode inductance is connected with the power supply control chip, and the of first differential mode inductance
Two the first DC low-voltages of termination；
The first end of first electrolytic capacitor is connected with the second end of first differential mode inductance, first electrolytic capacitor
Second end ground connection；
The plus earth of first rectifier diode, the cathode of first rectifier diode and first differential mode inductance
First end is connected；
At least one described linear voltage-stabilizing circuit is corresponded at least one the second DC low-voltage, and any second direct current
The voltage value of low pressure is respectively less than the voltage value of first DC low-voltage；
The first end of each linear voltage-stabilizing circuit is connected with the second end of first differential mode inductance, described in each
The second end of linear voltage-stabilizing circuit is connected to corresponding second DC low-voltage of body；
DC voltage copped wave is formed alternating voltage, and export exchange for inputting high voltage direct current by the power supply control chip
Electricity；
The output buck filter circuit, for inputting the alternating current of the power supply control chip output, and it is straight with described first
Stream low pressure is output voltage；
Each described linear voltage-stabilizing circuit is used to using first DC low-voltage as input voltage, and corresponding with itself
Second DC low-voltage is output voltage.
2. switching power circuit according to claim 1, which is characterized in that
Further include: filter circuit；
Wherein, the filter circuit includes: the second differential mode inductance, the second electrolytic capacitor and third electrolytic capacitor；
Wherein, the first end of second differential mode inductance is connected with external high voltage direct current electrical input, the second differential mode electricity
The second end of sense is connected with the power supply control chip；
The first end of second electrolytic capacitor is connected with the second end of second differential mode inductance, second electrolytic capacitor
Second end ground connection；
The first end of the third electrolytic capacitor is connected with the first end of second differential mode inductance, the third electrolytic capacitor
Second end ground connection.
3. switching power circuit according to claim 1, which is characterized in that
Further include: boostrap circuit；
Wherein, the boostrap circuit includes: the second rectifier diode, third rectifier diode, the 4th electrolytic capacitor and the 5th electricity
Solve capacitor；
Wherein, the anode of second rectifier diode is connected with the second end of first differential mode inductance；
The anode of the third rectifier diode is connected with the cathode of second rectifier diode；
The first end of 4th electrolytic capacitor is connected with the cathode of second rectifier diode, the 4th electrolytic capacitor
Second end is connected with the first end of first differential mode inductance；
The first end of 5th electrolytic capacitor is connected with the cathode of the third rectifier diode, the 5th electrolytic capacitor
Second end is connected with the first end of first differential mode inductance.
4. switching power circuit according to claim 3, which is characterized in that
Further include: feed circuit；
Wherein, the feed circuit includes: ceramic condenser, the first glass glaze film resistance, the second glass glaze film resistance, third glass
Glaze film resistance；
Wherein, the first end of the first glass glaze film resistance is connected with the cathode of second rectifier diode, and described first
The second end of glass glaze film resistance is connected with the power supply control chip；
The first end of the second glass glaze film resistance is connected with the second end of the first glass glaze film resistance, second glass
The second end of glass glaze film resistance is connected with the first end of the ceramic condenser；
The first end of the third glass glaze film resistance is connected with the power supply control chip, the third glass glaze film resistance
Second end is connected with the first end of the ceramic condenser；
The second end of the ceramic condenser is connected with the power supply control chip.
5. switching power circuit according to claim 1, which is characterized in that
The linear voltage-stabilizing circuit, comprising: first resistor, triode, voltage-stabiliser tube, the 4th rectifier diode, the 6th electrolytic capacitor；
Wherein, the first end of the first resistor is connected with the second end of first differential mode inductance, and the of the first resistor
Two ends are connected with the base stage of the triode；
The collector of the triode is connected with the second end of first differential mode inductance；
The cathode of the voltage-stabiliser tube is connected with the base stage of the triode, the plus earth of the voltage-stabiliser tube；
The first end of 4th rectifier diode is connected with the transmitter of the triode, and the of the 4th rectifier diode
Two one second output voltages of termination；
The first end of 6th electrolytic capacitor is connected with the second end of the 4th rectifier diode, the 6th electrolytic capacitor
Second end ground connection.
6. switching power circuit according to claim 1, which is characterized in that
The voltage value that different linear voltage-stabilizing circuits connect the second DC low-voltage is different.
7. switching power circuit according to claim 6, which is characterized in that
First DC low-voltage is 15V；
At least one described second DC low-voltage includes 12V and 5V.
8. switching power circuit according to claim 1, which is characterized in that
First electrolytic capacitor is an alminium electrolytic condenser；
First rectifier diode is semiconductor rectifier diode.
9. according to claim 1 to any switching power circuit in 8, which is characterized in that
The power supply control chip includes: NCP1 chip.
10. a kind of frequency-variable air conditioner outdoor machine characterized by comprising the Switching Power Supply as described in any in claim 1 to 9
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920415439.9U CN209447016U (en) | 2019-03-29 | 2019-03-29 | A kind of switching power circuit and frequency-variable air conditioner outdoor machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920415439.9U CN209447016U (en) | 2019-03-29 | 2019-03-29 | A kind of switching power circuit and frequency-variable air conditioner outdoor machine |
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| Publication Number | Publication Date |
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| CN209447016U true CN209447016U (en) | 2019-09-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920415439.9U Active CN209447016U (en) | 2019-03-29 | 2019-03-29 | A kind of switching power circuit and frequency-variable air conditioner outdoor machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654182A (en) * | 2020-05-09 | 2020-09-11 | 苏俊 | Auxiliary power supply circuit |
| CN112032981A (en) * | 2020-07-24 | 2020-12-04 | 广东积微科技有限公司 | Air conditioner indoor and outdoor unit communication circuit and air conditioner |
-
2019
- 2019-03-29 CN CN201920415439.9U patent/CN209447016U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111654182A (en) * | 2020-05-09 | 2020-09-11 | 苏俊 | Auxiliary power supply circuit |
| CN112032981A (en) * | 2020-07-24 | 2020-12-04 | 广东积微科技有限公司 | Air conditioner indoor and outdoor unit communication circuit and air conditioner |
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