CN105720845B - The switching power circuit and frequency-conversion domestic electric appliances of Width funtion input - Google Patents
The switching power circuit and frequency-conversion domestic electric appliances of Width funtion input Download PDFInfo
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- CN105720845B CN105720845B CN201410720461.6A CN201410720461A CN105720845B CN 105720845 B CN105720845 B CN 105720845B CN 201410720461 A CN201410720461 A CN 201410720461A CN 105720845 B CN105720845 B CN 105720845B
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Abstract
This application provides the switching power circuit and frequency-conversion domestic electric appliances of a kind of input of Width funtion, the switching power circuit of Width funtion input includes：DC voltage output circuit, first switch power circuit, main control chip, the first relay, the second relay, rectifier bridge, the first capacitance, the second capacitance, first resistor, second resistance.In this application, the different voltage values of the main control chip power grid obtained by calculation, different control is carried out to the first relay and the second relay, to obtain the different circuits being made of rectifier bridge, first resistor, second resistance, the first capacitance, the second capacitance, to reach in the voltage value difference of the power grid of input, identical preset voltage value is exported, the versatility of the switching power circuit of Width funtion input is improved.
Description
Technical field
This application involves power electronics field, more particularly to the switching power circuit of a kind of Width funtion input and frequency conversion
Household electrical appliances.
Background technology
Although current various countries household power system supply voltage difference is very big, usually the voltage of household power system is summarized as
110V and 220V two major classes nominal values.
Different network voltages brings very big difficulty to the design of Household appliance switch power circuit, especially for change
Frequency household electrical appliances, the switching power circuit of frequency-conversion domestic electric appliances at present, due to the limitation of motor drive module busbar voltage, for 220V and
Two kinds of control sources of 110V, can only take 2 kinds of circuit arrangements, referring to Fig. 1 and Fig. 2.Fig. 1 shows defeated for 220V voltages
Enter, the schematic diagram of the switching power circuit of frequency-conversion domestic electric appliances, Fig. 2 shows be directed to 110V control sources, the switch of frequency-conversion domestic electric appliances
The schematic diagram of power circuit.
If to being directed to 220V control sources shown in Fig. 1,220V alternating currents are added in the switching power circuit of frequency-conversion domestic electric appliances,
The required busbar voltage of output end output motor drive module of switching power circuit shown in Fig. 1, makes motor drive module
Normal work；If to Fig. 2 shows be directed to 110V control sources, 110V exchanges are added in the switching power circuits of frequency-conversion domestic electric appliances
Electricity, Fig. 2 shows switching power circuit the required busbar voltage of output end output motor drive module, make motor drive mould
Block works normally.But if to being directed to 220V control sources shown in Fig. 1,110V is added in the switching power circuit of frequency-conversion domestic electric appliances
Alternating current can lead to motor drive module brownout and can not work normally；If to Fig. 2 shows for 110V voltages it is defeated
Enter, 220V alternating currents are added in the switching power circuit of frequency-conversion domestic electric appliances, and the voltage value that 220V is exported after rectifying and wave-filtering reaches
600V or more, and therefore the bus voltage upper limit of motor drive module is usually in 500V hereinafter, easily burn motor drive module
Circuit element.
Therefore circuit shown in Fig. 1 and Fig. 2 shows circuit be respectively only capable of ensureing motor for a kind of control source
Drive module works normally, poor universality.
Invention content
In order to solve the above technical problems, the embodiment of the present application provides switching power circuit and the frequency conversion of a kind of Width funtion input
Household electrical appliances, to achieve the purpose that improve the versatility of the switching power circuit of Width funtion input, technical solution is as follows：
A kind of switching power circuit of Width funtion input, including：
The DC voltage output circuit that first input end is connected with the firewire of power grid, the of the DC voltage output circuit
Two input terminals are connected with the zero curve of the power grid, and the first output end of the DC voltage output circuit is connected with main control chip,
The second output terminal of the DC voltage output circuit is connected with first switch power circuit, and the DC voltage output circuit is used
In the voltage of the power grid is converted to DC voltage and is exported；
The first relay that first end is connected with the firewire of the power grid, the second end and rectifier bridge of first relay
First end be connected, the third end of first relay is connected with the first power supply, the 4th end of first relay and institute
Main control chip is stated to be connected；
The second relay that first end is connected with the zero curve of the power grid, the second end of second relay is respectively with
One common end is connected with the second common end, and the third end of second relay is connected with the main control chip, described second after
4th end of electric appliance is connected with second source, and first common end is the common end of the first capacitance and the second capacitance, and described the
Two common ends are the common end of first resistor and second resistance；
The second end of the rectifier bridge respectively with the second end of second capacitance, the second end phase of the second resistance
Even, the third end of the rectifier bridge is connected with the zero curve of the power grid, and the 4th end of the rectifier bridge is electric with described first respectively
The first end of appearance, the first end of the first resistor are connected；
The first end of the first resistor is connected with the busbar of motor drive module, the second termination of the second resistance
Ground；
The main control chip is connected with the output end of the first switch power circuit, for detecting the DC voltage
Numerical value goes out the voltage value of the power grid according to the numerical computations of the DC voltage, is equal to first in the voltage value of the power grid
When preset value, the second relay actuation, first relay actuation are controlled successively, makes the first end of the first resistor
Export preset voltage value；When the voltage value of the power grid is equal to the second preset value, control successively second relay disconnect,
First relay is attracted, and so that the first end of the first resistor is exported the preset voltage value, the preset voltage value is
It can ensure the voltage value of the motor drive module normal work, the value range of first preset value is 110V- first
The value range of the first error amounts of error amount~110V+, second preset value is the second error amounts of 220V-~220V+ second
Error amount, first preset value are not equal to second preset value；
The second switch power circuit that input terminal is connected with the first end of the first resistor, the second switch power supply electricity
The output end on road motor drive module control chip corresponding with the motor drive module is connected.
Preferably, the DC voltage output circuit includes：
It is filtered for the voltage to the power grid, exports the current rectifying and wave filtering circuit of the first DC voltage and for institute
It states the first DC voltage to be divided, exports the bleeder circuit of the DC voltage；
First input end of the first input end of the current rectifying and wave filtering circuit as the DC voltage output circuit, with institute
The firewire for stating power grid is connected；
Second input terminal of second input terminal of the current rectifying and wave filtering circuit as the DC voltage output circuit, with institute
The zero curve for stating power grid is connected；
Second output terminal of the output end of the current rectifying and wave filtering circuit as the DC voltage output circuit, with described
One switching power circuit is connected；
The first end of the bleeder circuit is connected with the output end of the current rectifying and wave filtering circuit, and the second of the bleeder circuit
End ground connection, the first output end of the output end of the bleeder circuit as the DC voltage output circuit, with the master control core
Piece is connected.
Preferably, the bleeder circuit includes 3rd resistor and the 4th resistance；
The second end of the 3rd resistor is connected with the first end of the 4th resistance；
First end of the first end of the 3rd resistor as the bleeder circuit, the output with the current rectifying and wave filtering circuit
End is connected；
The second end of 4th resistance is grounded；
Output end of the common end of the 3rd resistor and the 4th resistance as the bleeder circuit, with the master control
Chip is connected.
Preferably, the main control chip is additionally operable to when the voltage value for calculating the power grid is not in normal range (NR), is touched
It sends out the suggestion device prompt network voltage being connected with the main control chip and exception occurs.
Preferably, the voltage value of first DC voltage be equal to the power grid voltage value withProduct；
The main control chip is according to formulaCalculate the voltage value of the power grid, the VSIt is described
The voltage value of power grid, the VIFor the voltage value of the DC voltage, the R3For 3rd resistor, the R4For the 4th resistance.
Preferably, the value range of first preset value can also be：127V- thirds error amount~127V+ thirds are missed
The value range of difference, second preset value can also be：Four error amounts of 220V-~the 4th error amounts of 220V+.
A kind of frequency-conversion domestic electric appliances, including motor drive module and as described in above-mentioned any one Width funtion input Switching Power Supply
Circuit；
The switching power circuit of the Width funtion input exports preset voltage value to the motor drive module.
Preferably, the frequency-conversion domestic electric appliances include at least：Convertible frequency air-conditioner.
Preferably, the frequency-conversion domestic electric appliances include at least：
Frequency conversion refrigerator.
Preferably, the frequency-conversion domestic electric appliances include at least：Variable-frequency washing machine.
Compared with prior art, the application has the beneficial effect that：
In this application, the switching power circuit of Width funtion input includes：DC voltage output circuit, first switch power supply
Circuit, main control chip, the first relay, the second relay, rectifier bridge, the first capacitance, the second capacitance, first resistor and the second electricity
Resistance, wherein main control chip is used to detect the numerical value of the DC voltage, goes out the electricity according to the numerical computations of the DC voltage
The voltage value of net controls second relay and is attracted, is described successively when the voltage value of the power grid is equal to the first preset value
First relay is attracted, and the first end of the first resistor is made to export preset voltage value；It is equal to the in the voltage value of the power grid
When two preset values, the second relay disconnection, first relay actuation are controlled successively, makes the first of the first resistor
End exports the preset voltage value.
As it can be seen that the different voltage values of the main control chip power grid obtained by calculation, to the first relay and second
Relay carries out different control, to obtain being made of rectifier bridge, first resistor, second resistance, the first capacitance and the second capacitance
Different circuits export identical preset voltage value to reach in the voltage value difference of the power grid of input, with ensure
Motor drive module works normally, and improves the versatility of the switching power circuit of width+control source.
Description of the drawings
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present application, for
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is to be directed to 220V control sources, the schematic diagram of the switching power circuit of frequency-conversion domestic electric appliances in the prior art；
Fig. 2 is to be directed to 110V control sources, the schematic diagram of the switching power circuit of frequency-conversion domestic electric appliances in the prior art；
Fig. 3 is a kind of schematic diagram of the switching power circuit of Width funtion input provided by the present application；
Fig. 4 is a kind of work flow diagram of main control chip provided by the present application；
Fig. 5 is another schematic diagram of the switching power circuit of Width funtion input provided by the present application；
Fig. 6 is another schematic diagram of the switching power circuit of Width funtion input provided by the present application；
Fig. 7 is another schematic diagram of the switching power circuit of Width funtion input provided by the present application；
Fig. 8 is another schematic diagram of the switching power circuit of Width funtion input provided by the present application；
Fig. 9 is another schematic diagram of the switching power circuit of Width funtion input provided by the present application；
Figure 10 is a kind of logical construction schematic diagram of frequency-conversion domestic electric appliances provided by the present application.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
Embodiment one
Fig. 3 is referred to, it is wide it illustrates a kind of schematic diagram of the switching power circuit of Width funtion provided by the present application input
The switching power circuit of control source includes：DC voltage output circuit 31, first switch power circuit SMPS1, main control chip
32, the first relay RY1, the second relay RY2, rectifier bridge BD1, the first capacitance C1, the second capacitance C2, first resistor R1 and
Two resistance R2.It should be noted that the V in Fig. 3sIndicate the voltage of power grid.
The first input end of the DC voltage output circuit 31 is connected with the firewire L of power grid, the direct voltage output
Second input terminal of circuit 31 is connected with the zero curve N of the power grid, the first output end of the DC voltage output circuit 31 with
Main control chip 32 is connected, and the second output terminal of the DC voltage output circuit 31 is connected with first switch power circuit SMPS1,
The DC voltage output circuit 31 is for being converted to DC voltage by the voltage of the power grid and exporting.
The first end of the first relay RY1 is connected with the firewire L of the power grid, and the of the first relay RY1
Two ends are connected with the first end of the rectifier bridge BD1, and the third end of the first relay RY1 is connected with the first power supply VCC1,
The 4th end of the first relay RY1 is connected with the main control chip 32.
The first end of the second relay RY2 is connected with the zero curve N of the power grid, and the of the second relay RY2
Two ends are connected with the first common end and the second common end respectively, third end and the main control chip of the second relay RY2
32 are connected, and the 4th end of the second relay RY2 is connected with second source VCC2, wherein first common end is described the
The common end of one capacitance C1 and the second capacitance C2, second common end are the first resistor R1's and second resistance R2
Common end.
The second end of the rectifier bridge BD1 respectively with the second end of the second capacitance C2, the second resistance R2
Two ends are connected, and the third end of the rectifier bridge BD1 is connected with the zero curve N of the power grid, the 4th end difference of the rectifier bridge BD1
It is connected with the first end of the first capacitance C1, the first end of the first resistor R1.
The first end of the first resistor R1 is connected with the busbar of motor drive module, the second end of the second resistance R2
Ground connection.
The main control chip 32 is connected with the output end of the first switch power circuit SMPS1, described straight for detecting
The numerical value of galvanic electricity pressure goes out the voltage value of the power grid according to the numerical computations of the DC voltage, in the voltage value of the power grid
It when equal to the first preset value, controls that the second relay RY2 is attracted, the first relay RY1 is attracted successively, makes described the
The first end of one resistance R1 exports preset voltage value；When the voltage value of the power grid is equal to the second preset value, institute is controlled successively
The second relay RY2 disconnections, the first relay RY1 actuations are stated, so that the first end of the first resistor R1 is exported described pre-
If voltage value, the preset voltage value is the voltage value that can ensure the motor drive module normal work, and described first is pre-
If the value range of value is the first error amounts of the first error amounts of 110V-~110V+, the value range of second preset value is
The second error amounts of the second error amounts of 220V-~220V+, first preset value are not equal to second preset value.
In the present embodiment, preset voltage value specifically can with but be not limited to+310V.Wherein, it only needs respectively to first
Capacitance C1, the second capacitance C2, first resistor R1, second resistance R2 value be arranged accordingly, you can realize preset voltage value
For+310V.
The value of first error amount is set according to the switching power circuit that the Width funtion of the present embodiment inputs, and second misses
The value of difference is set also according to the switching power circuit of the Width funtion input of the present embodiment, but needs to meet local
Voltage error standard.Certainly, country variant is different the setting of the first error amount and the second error amount, such as in
The standard value of state, the first error amount and the second error amount is 6V.
Specifically, main control chip 32 controls institute successively when the voltage value for calculating the power grid is equal to the first preset value
State the second relay RY2 actuations, the first relay RY1 is attracted i.e. main control chip 32 in the voltage value for calculating the power grid
When equal to the first preset value, the second relay RY2 is controlled first and is attracted, then control the first relay RY1 and be attracted.Main control chip
32 are attracted in the second relay of control RY2, and after then controlling the first relay RY1 actuations, the second relay RY2, which is in, is attracted shape
State, the first relay RY1 are in attracting state, rectifier bridge BD1, the second relay RY2, the first capacitance C1, the second capacitance C2,
One resistance R1, second resistance R2 constitute typical voltage doubling rectifing circuit, the voltage stream of the power grid equal with the first preset value
It crosses and is made of rectifier bridge BD1, the second relay RY2, the first capacitance C1, the second capacitance C2, first resistor R1, second resistance R2
Output+310V DC voltages after voltage doubling rectifing circuit.
Main control chip 32 the voltage value for calculating the power grid be equal to the second preset value when, control successively described second after
It is that main control chip 32 is equal to second in the voltage value for calculating the power grid that electric appliance RY2, which is disconnected, the first relay RY1 is attracted
When preset value, the second relay RY2 is controlled first and is disconnected, then control the first relay RY1 and be attracted.Main control chip 32 is controlling
Second relay RY2 is disconnected, and after the first relay of control RY1 is attracted, the second relay RY2 is off, the first relay
Device RY1 is in attracting state, and the voltage of the power grid equal with the second preset value passes through by rectifier bridge BD1 and the first capacitance
Output+310V DC voltages after the filter circuit that C1, the second capacitance C2, first resistor R1, second resistance R2 are constituted, as motor
The busbar voltage of drive module, for driving variable-frequency motor.
In the present embodiment, the switching power circuit of Width funtion input exports preset voltage value to motor drive module
On busbar, before addressed, the first end of the first resistor R1 is connected with the busbar of motor drive module, therefore passes through first
The first end of resistance R1 exports preset voltage value to motor drive module.
In embodiment one, the switching power circuit of Width funtion input can also carry out in real time the fluctuation on network voltage
Monitoring, if unusual fluctuations occurs in network voltage, main control chip 32 can start corresponding control program to realize to electricity
The smooth drive of machine.Specifically, the main control chip 32 is additionally operable in the voltage value for calculating the power grid not in normal range (NR)
When interior, trigger the suggestion device prompt network voltage being connected with the main control chip 32 and exception occur, phase is taken to embody user
The safeguard measure answered.
Wherein, suggestion device can with but be not limited to display circuit, pass through and show that electric voltage exception prompts user.Prompt dress
Set can with but be not limited to audio alert, pass through voice prompt electric voltage exception.
In this application, the switching power circuit of Width funtion input includes：DC voltage output circuit, first switch power supply
Circuit, main control chip, the first relay, the second relay, rectifier bridge, the first capacitance, the second capacitance, first resistor and the second electricity
Resistance, wherein main control chip is used to detect the numerical value of the DC voltage, goes out the electricity according to the numerical computations of the DC voltage
The voltage value of net controls second relay and is attracted, is described successively when the voltage value of the power grid is equal to the first preset value
First relay is attracted, and the first end of the first resistor is made to export preset voltage value；It is equal to the in the voltage value of the power grid
When two preset values, the second relay disconnection, first relay actuation are controlled successively, makes the first of the first resistor
End exports the preset voltage value.
As it can be seen that the different voltage values of the main control chip power grid obtained by calculation, to the first relay and second
Relay carries out different control, to obtain being made of rectifier bridge, first resistor, second resistance, the first capacitance and the second capacitance
Different circuits export identical preset voltage value to reach in the voltage value difference of the power grid of input, with ensure
Motor drive module works normally, and improves the versatility of the switching power circuit of Width funtion input.
Based on embodiment one, now the workflow of main control chip 32 is illustrated, specifically refers to Fig. 4, Fig. 4 is shown
A kind of work flow diagram of main control chip provided by the present application, the workflow of main control chip are specially：
Step S41：Main control chip judges the voltage value of the power grid.
When the voltage value of the power grid is equal to the second preset value, step S42 is executed；It is equal in the voltage value of the power grid
When the first preset value, step S43 is executed, when the voltage value of the power grid is not in normal range (NR), executes step S44.
It should be noted that the voltage value of the power grid does not specifically refer to the voltage value of the power grid neither in normal range (NR)
Equal to the second preset value, also it is not equal to the first preset value.
Step S42：The second relay RY2 is controlled to disconnect.
Step S43：The second relay RY2 is controlled to be attracted.
Step S44：It triggers the suggestion device prompt network voltage being connected with the main control chip and exception occurs.
Step S45：The first relay RY1 is controlled to be attracted.
Embodiment two
In the present embodiment, other one is expanded on the basis of the switching power circuit of the Width funtion input shown in Fig. 3
The switching power circuit of kind Width funtion input, as shown in figure 5, the base of the switching power circuit in the Width funtion input shown in Fig. 3
Further include on plinth：Second switch power circuit SMPS2.
The input terminal of second switch power circuit SMPS2 is connected with the R1 first ends of the first resistor, and described second opens
The output end motor drive module control chip corresponding with the motor drive module of powered-down source circuit SMPS2 is connected.
In the present embodiment, the first end of first resistor R1 is connected with the input terminal of second switch power circuit SMPS2, because
This, is exported preset voltage value to second switch power circuit SMPS2 by the first end of first resistor R1, by second switch electricity
Preset voltage value is transformed to motor drive module and controls the required operating voltage of chip by source circuit SMPS2, so that motor drives
Dynamic model block controls chip normal work, and control motor drive module carries out corresponding operating.
In embodiment one and embodiment two, DC voltage output circuit 31 includes：Current rectifying and wave filtering circuit 61 and partial pressure electricity
Road 62, as shown in Figure 6 and Figure 7, the switching power circuit of the Width funtion input wherein shown in Fig. 6 corresponding embodiments one, Fig. 7 correspond to
The switching power circuit of Width funtion input shown in embodiment two.
Current rectifying and wave filtering circuit 61 is filtered for the voltage to the power grid, exports the first DC voltage.
Bleeder circuit 62 exports the DC voltage for being divided to first DC voltage.
First input end of the first input end of the current rectifying and wave filtering circuit 61 as the DC voltage output circuit 31,
It is connected with the bleeder circuit 62 of the power grid.
Second input terminal of second input terminal of the current rectifying and wave filtering circuit 61 as the DC voltage output circuit 31,
It is connected with the zero curve N of the power grid.
Second output terminal of the output end of the current rectifying and wave filtering circuit 61 as the DC voltage output circuit 31, with institute
First switch power circuit is stated to be connected.
The first end of the bleeder circuit 62 is connected with the output end of the current rectifying and wave filtering circuit 61, the bleeder circuit 62
Second end ground connection, the first output end of the output end of the bleeder circuit 62 as the DC voltage output circuit 31, with
The main control chip 32 is connected.
Specifically, the bleeder circuit 62 includes：3rd resistor R3 and the 4th resistance R4, as shown in Figure 8 and Figure 9.
The second end of the 3rd resistor R3 is connected with the first end of the 4th resistance R4.
First end of the first end of the 3rd resistor R3 as the bleeder circuit 62, with the current rectifying and wave filtering circuit 61
Output end be connected.
The second end of the 4th resistance R4 is grounded.
Output end of the common end of the 3rd resistor R3 and the 4th resistance R4 as the bleeder circuit 62, with institute
Main control chip 32 is stated to be connected.
In embodiment one and embodiment two, the current rectifying and wave filtering circuit 61 is specially bridge rectifier filter circuit.Rectification
Filter circuit 61 in the above-described embodiments, after carrying out rectifying and wave-filtering to the voltage of the power grid, the first DC voltage of output
Voltage value be equal to the power grid voltage value withProduct.
Main control chip 32 is according to formulaThe voltage value of the power grid is calculated, the VS is the electricity
The voltage value of net, the VIFor the voltage value of the DC voltage, described is R33rd resistor, the R4For the 4th resistance.
Since main control chip 32 is capable of detecting when the numerical value of the DC voltage, and R3And R4It is known, therefore master control core
Piece 32 can be according to the numerical value and formula of the DC voltageCalculate the voltage value of the power grid.
In the above-described embodiments, first switch power circuit SMPS1 output end output voltage value be specifically as follows+
5V, the first power supply VCC1 are specifically as follows+5V, and second source VCC2 is specifically as follows+5V, second switch power circuit SMPS2
Output end output voltage value be specifically as follows+15V.
It should be noted that in embodiment one and embodiment two, since the household power system of different regions powers nominal value not
It is identical to the greatest extent, therefore the value range of first preset value can also be：127V- thirds error amount~127V+ third error amounts,
The value range of second preset value can also be：Four error amounts of 220V-~the 4th error amounts of 220V+.For example, Brazilian
All there are two types of voltages, respectively 127V and 220V for basic each household family.Wherein, the value of third error amount is according to the present embodiment
The switching power circuit of Width funtion input is set, and the value of the 4th error amount is inputted also according to the Width funtion of the present embodiment
Switching power circuit set, but need to meet local voltage error standard.
Embodiment three
In the present embodiment, a kind of frequency-conversion domestic electric appliances provided by the present application are shown, Figure 10 is referred to, Figure 10 shows this Shen
A kind of logical construction schematic diagram for the frequency-conversion domestic electric appliances that please be provided, frequency-conversion domestic electric appliances include：The switching power circuit 101 of Width funtion input
With motor drive module 102.
The concrete structure and the Width funtion shown in embodiment one, embodiment two of the switching power circuit 101 of Width funtion input
The switching power circuit of input is identical, and details are not described herein.
Motor drive module 102 is identical as the motor drive module that embodiment one and embodiment two refer to, no longer superfluous herein
It states.
In the present embodiment, the switching power circuit 101 of Width funtion input, which exports preset voltage value to motor, drives mould
Block 102.
In the present embodiment, the frequency-conversion domestic electric appliances include at least convertible frequency air-conditioner or frequency conversion refrigerator or variable-frequency washing machine.
It should be noted that each embodiment in this specification is described in a progressive manner, each embodiment weight
Point explanation is all difference from other examples, and the same or similar parts between the embodiments can be referred to each other.
For device class embodiment, since it is basically similar to the method embodiment, so fairly simple, the related place ginseng of description
See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit is realized can in the same or multiple software and or hardware when application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It is realized by the mode of software plus required general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be expressed in the form of software products, the computer software product
It can be stored in a storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions are used so that a computer equipment
(can be personal computer, server either network equipment etc.) executes the certain of each embodiment of the application or embodiment
Method described in part.
The switching power circuit and frequency-conversion domestic electric appliances of Width funtion input provided herein are described in detail above,
Specific examples are used herein to illustrate the principle and implementation manner of the present application, and the explanation of above example is only used
Understand the present processes and its core concept in help；Meanwhile for those of ordinary skill in the art, according to the application's
Thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as
Limitation to the application.
Claims (10)
1. a kind of switching power circuit of Width funtion input, which is characterized in that including：
The DC voltage output circuit that first input end is connected with the firewire of power grid, the second of the DC voltage output circuit are defeated
Enter end with the zero curve of the power grid to be connected, the first output end of the DC voltage output circuit is connected with main control chip, described
The second output terminal of DC voltage output circuit is connected with first switch power circuit, and the DC voltage output circuit is used for will
The voltage of the power grid is converted to DC voltage and exports；
The first relay that first end is connected with the firewire of the power grid, the second end of first relay and the of rectifier bridge
One end is connected, and the third end of first relay is connected with the first power supply, the 4th end and the master of first relay
Chip is controlled to be connected；
The second end of the second relay that first end is connected with the zero curve of the power grid, second relay is public with first respectively
End is connected with the second common end altogether, and the third end of second relay is connected with the main control chip, second relay
The 4th end be connected with second source, first common end is the common end of the first capacitance and the second capacitance, and described second is public
End is the common end of first resistor and second resistance altogether；
The second end of the rectifier bridge is connected with the second end of second capacitance, the second end of the second resistance respectively, institute
The third end for stating rectifier bridge is connected with the zero curve of the power grid, the 4th end of the rectifier bridge respectively with first capacitance
One end, the first end of the first resistor are connected；
The first end of the first resistor is connected with the busbar of motor drive module, the second end ground connection of the second resistance；
The main control chip is connected with the output end of the first switch power circuit, the number for detecting the DC voltage
Value, the voltage value of the power grid is gone out according to the numerical computations of the DC voltage, and it is pre- to be equal to first in the voltage value of the power grid
If when value, controlling the second relay actuation, first relay actuation successively, keeping the first end of the first resistor defeated
Go out preset voltage value；When the voltage value of the power grid is equal to the second preset value, the second relay disconnection, institute are controlled successively
The actuation of the first relay is stated, the first end of the first resistor is made to export the preset voltage value, the preset voltage value is energy
Enough ensure that the voltage value of the motor drive module normal work, the value range of first preset value miss for 110V- first
The value range of the first error amounts of difference~110V+, second preset value is missed for the second error amounts of 220V-~220V+ second
Difference, first preset value are not equal to second preset value；
The second switch power circuit that input terminal is connected with the first end of the first resistor, the second switch power circuit
Output end motor drive module control chip corresponding with the motor drive module is connected.
2. the switching power circuit of Width funtion input according to claim 1, which is characterized in that the direct voltage output
Circuit includes：
It is filtered for the voltage to the power grid, exports the current rectifying and wave filtering circuit of the first DC voltage and for described the
One direct current pressure is divided, and the bleeder circuit of the DC voltage is exported；
First input end of the first input end of the current rectifying and wave filtering circuit as the DC voltage output circuit, with the electricity
The firewire of net is connected；
Second input terminal of second input terminal of the current rectifying and wave filtering circuit as the DC voltage output circuit, with the electricity
The zero curve of net is connected；
Second output terminal of the output end of the current rectifying and wave filtering circuit as the DC voltage output circuit is opened with described first
Powered-down source circuit is connected；
The first end of the bleeder circuit is connected with the output end of the current rectifying and wave filtering circuit, the second termination of the bleeder circuit
Ground, the first output end of the output end of the bleeder circuit as the DC voltage output circuit, with the main control chip phase
Even.
3. the switching power circuit of Width funtion according to claim 2 input, which is characterized in that the bleeder circuit includes
3rd resistor and the 4th resistance；
The second end of the 3rd resistor is connected with the first end of the 4th resistance；
First end of the first end of the 3rd resistor as the bleeder circuit, the output end phase with the current rectifying and wave filtering circuit
Even；
The second end of 4th resistance is grounded；
Output end of the common end of the 3rd resistor and the 4th resistance as the bleeder circuit, with the main control chip
It is connected.
4. the switching power circuit of Width funtion input according to claim 1, which is characterized in that the main control chip is also used
It is carried in when the voltage value for calculating the power grid is not in normal range (NR), triggering the suggestion device being connected with the main control chip
It is abnormal to show that network voltage occurs.
5. the switching power circuit of Width funtion input according to claim 2, which is characterized in that first DC voltage
Voltage value be equal to the power grid voltage value withProduct；
The main control chip is according to formulaCalculate the voltage value of the power grid, the VSFor the power grid
Voltage value, the VIFor the voltage value of the DC voltage, the R3For 3rd resistor, the R4For the 4th resistance.
6. the switching power circuit of the Width funtion input according to claim 1-5 any one, which is characterized in that described the
The value range of one preset value can also be：127V- thirds error amount~127V+ third error amounts, second preset value
Value range can also be：Four error amounts of 220V-~the 4th error amounts of 220V+.
7. a kind of frequency-conversion domestic electric appliances, which is characterized in that including motor drive module and wide electricity as claimed in any one of claims 1 to 6
Press the switching power circuit of input；
The switching power circuit of the Width funtion input exports preset voltage value to the motor drive module.
8. frequency-conversion domestic electric appliances according to claim 7, which is characterized in that the frequency-conversion domestic electric appliances include at least：Convertible frequency air-conditioner.
9. frequency-conversion domestic electric appliances according to claim 7, which is characterized in that the frequency-conversion domestic electric appliances include at least：
Frequency conversion refrigerator.
10. frequency-conversion domestic electric appliances according to claim 7, which is characterized in that the frequency-conversion domestic electric appliances include at least：Frequency conversion is done washing
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720461.6A CN105720845B (en) | 2014-12-02 | 2014-12-02 | The switching power circuit and frequency-conversion domestic electric appliances of Width funtion input |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410720461.6A CN105720845B (en) | 2014-12-02 | 2014-12-02 | The switching power circuit and frequency-conversion domestic electric appliances of Width funtion input |
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| Publication Number | Publication Date |
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| CN105720845A CN105720845A (en) | 2016-06-29 |
| CN105720845B true CN105720845B (en) | 2018-09-25 |
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| CN101414193A (en) * | 2007-10-16 | 2009-04-22 | 鸿富锦精密工业（深圳）有限公司 | Power supply automatic switchover circuit |
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| CN201717797U (en) * | 2010-07-13 | 2011-01-19 | 上海熔易焊接机制造有限公司 | Contraviriant and multipurpose plasma cutting input voltage automatic switch circuit of arc welding machine |
| CN102299617A (en) * | 2011-08-23 | 2011-12-28 | 杨义根 | Automatic voltage switch and implementation method thereof |
| CN202197211U (en) * | 2011-07-07 | 2012-04-18 | 威海金丰电子有限公司 | AC input voltage automatic switching circuit |
| CN202524312U (en) * | 2012-03-20 | 2012-11-07 | 深圳市福佳电器有限公司 | Switch power supply possessing alternating current 110/220V automatic switchover function |
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2014
- 2014-12-02 CN CN201410720461.6A patent/CN105720845B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101414193A (en) * | 2007-10-16 | 2009-04-22 | 鸿富锦精密工业（深圳）有限公司 | Power supply automatic switchover circuit |
| CN201616697U (en) * | 2009-09-04 | 2010-10-27 | 杭州勇华车业有限公司 | High-power charger capable of automatically identifying input AC voltage |
| CN201717797U (en) * | 2010-07-13 | 2011-01-19 | 上海熔易焊接机制造有限公司 | Contraviriant and multipurpose plasma cutting input voltage automatic switch circuit of arc welding machine |
| CN202197211U (en) * | 2011-07-07 | 2012-04-18 | 威海金丰电子有限公司 | AC input voltage automatic switching circuit |
| CN102299617A (en) * | 2011-08-23 | 2011-12-28 | 杨义根 | Automatic voltage switch and implementation method thereof |
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| CN105720845A (en) | 2016-06-29 |
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