CN114759793A - Multi-output switching power supply, air conditioner controller and air conditioner - Google Patents
Multi-output switching power supply, air conditioner controller and air conditioner Download PDFInfo
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- CN114759793A CN114759793A CN202011587622.0A CN202011587622A CN114759793A CN 114759793 A CN114759793 A CN 114759793A CN 202011587622 A CN202011587622 A CN 202011587622A CN 114759793 A CN114759793 A CN 114759793A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33561—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having more than one ouput with independent control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
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- Dc-Dc Converters (AREA)
Abstract
The invention discloses a multi-output switching power supply, an air conditioner controller and an air conditioner. The adjusting output circuit is used for performing alternating current superposition and rectification on alternating current power signals of the second output winding and the third output winding, then outputting a second direct current power supply through the second output end, performing alternating current and direct current superposition on the second direct current power supply and the alternating current power signals on the first output winding, then outputting a first direct current power supply through the first output end after rectification, and outputting a third direct current power supply through the third output end after rectifying the alternating current power signals of the third output winding. The technical problem that the stability of the output voltage after the feedback regulation of the switching power supply with multi-path output is poor is solved by the scheme.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-output switching power supply, an air conditioner controller and an air conditioner.
Background
The existing switching power supply can be applied to various occasions as a common power supply circuit, a feedback circuit is generally matched with the switching power supply to feed back and regulate output voltage, when the switching power supply has multi-path output, the feedback of the switching power supply has two forms, one is to select a heavy load to be used as the feedback of the multi-path output all the way, but the stability of other non-feedback output voltages is poor, and generally the output voltage stability is ensured by additionally adding a three-terminal voltage stabilizer after the non-feedback is returned. The other way is through two-way feedback and multi-way feedback, which improves the stability of multi-way output to a certain extent, but has fluctuation to the stability of each output.
Disclosure of Invention
The invention mainly aims to provide a multi-output switching power supply, and aims to solve the technical problem that the stability of output voltage after feedback regulation of the multi-output switching power supply is poor.
In order to achieve the above object, the present invention provides a multiple-output switching power supply, including:
the voltage transformation output circuit is provided with a first output winding, a second output winding and a third output winding;
the adjusting output circuit is provided with a first output end, a second output end and a third output end and is used for outputting a second direct current power supply through the second output end after alternating current superposition and rectification are carried out on alternating current power supply signals of the second output winding and the third output winding; the second direct-current power supply and the alternating-current power supply signal on the first output winding are subjected to alternating-current and direct-current superposition and rectified, and then the first direct-current power supply is output through the first output end, and the second direct-current power supply is also used for rectifying the alternating-current power supply signal of the third output winding and then outputting a third direct-current power supply through the third output end;
and the feedback regulating circuit is used for sampling the second direct-current power supply output by the second output end and regulating the voltage transformation output circuit according to the sampling signal so as to control the voltage of the first direct-current power supply, the second direct-current power supply and the third direct-current power supply.
Optionally, the transformer output circuit has a primary input, a secondary input, a first output, a second output, and a third output, the transformation output circuit also comprises a primary input winding, the first end of the primary input winding is the primary input end of the transformation output circuit, the regulation output circuit also comprises a first input end, a second input end and a third input end, the primary input end of the transformation output circuit is connected with the output end of the feedback regulation circuit, the secondary input end of the voltage transformation output circuit is connected with the second output end of the regulation output circuit, the first output end of the voltage transformation output circuit is connected with the first input end of the regulation output circuit, the second output end of the voltage transformation output circuit is connected with the second input end of the regulation output circuit, and the third output end of the voltage transformation output circuit is connected with the third input end of the adjustment output circuit.
Optionally, the second output winding and the third output winding are connected in series; the first end of the first output winding is a secondary input end of the transformation output circuit, and the second end of the first output winding is a first output end of the transformation output circuit; the first end of the second output winding is the second output end of the voltage transformation output circuit, the second end of the second output winding is connected with the first end of the third output winding, and the connection node of the second output winding is the third output end of the voltage transformation output circuit; the second end of the third output winding is grounded, and the second output end of the voltage transformation output circuit is connected with the sampling end of the feedback regulation circuit.
Optionally, the adjustment output circuit includes a first output circuit, a second output circuit, and a third output circuit, where an input end of the first output circuit is a first input end of the adjustment output circuit, and an output end of the first output circuit is a first output end of the adjustment output circuit; the input end of the second output circuit is the second input end of the adjustment output circuit, and the output end of the second output circuit is the second output end of the adjustment output circuit; the input end of the third output circuit is a third input end of the adjustment output circuit, and the output end of the third output circuit is a third output end of the adjustment output circuit;
the first output circuit is used for performing alternating current and direct current superposition on a second direct current power supply and an alternating current power supply signal on the first output winding, rectifying the alternating current power supply signal and outputting the alternating current power supply signal as a first direct current power supply;
the second output circuit is used for performing alternating current superposition on the alternating current power supply signal on the second output winding and the alternating current power supply signal on the third output winding, rectifying the alternating current power supply signal and outputting the rectified alternating current power supply signal as a second direct current power supply;
and the third output circuit is used for rectifying the alternating current power supply signal on the third output winding and outputting the rectified alternating current power supply signal as a third direct current power supply.
Optionally, the first output circuit includes a first diode and a first capacitor, an anode of the first diode is an input end of the first output circuit, a cathode of the first diode is connected to a first end of the first capacitor, a connection node of the first diode is an output end of the first output circuit, and a second end of the first capacitor is grounded.
Optionally, the second output circuit includes a second diode and a second capacitor, an anode of the second diode is an input end of the second output circuit, a cathode of the second diode is connected to a first end of the second capacitor, a connection node thereof is an output end of the second output circuit, and a second end of the second capacitor is grounded.
Optionally, the third output circuit includes a third diode and a third capacitor, an anode of the third diode is an input end of the third output circuit, a cathode of the third diode is connected to a first end of the third capacitor, a connection node thereof is an output end of the third output circuit, and a second end of the third capacitor is grounded.
Optionally, the voltage of the second dc power supply is less than the voltage of the first dc power supply.
Optionally, the voltage of the third dc power supply is less than the voltage of the second dc power supply.
Optionally, when the number of coils of the second output winding is N and the number of coils of the third output winding is M, the voltage of the ac power signal of the second output winding is NV, and the voltage of the ac power signal of the third output winding is MV, the voltage of the second dc power is a sum of an absolute value of NV and an absolute value of MV.
Alternatively, when the number of coils of the first output winding is P and the voltage of the third output winding is Pv, the voltage of the first dc power supply is the sum of the absolute values of the voltage of the second dc power supply and the voltage of the ac power supply signal of the third output winding, that is, the voltage of the first dc power supply is equal to the sum of the absolute value of NV, the absolute value of MV, and the absolute value of Pv.
Optionally, the feedback adjusting circuit includes a control circuit and a feedback circuit, an output end of the control circuit is an output end of the feedback adjusting circuit, a feedback signal end of the control circuit is connected to an output end of the feedback circuit, and a sampling end of the feedback circuit is connected to the second output end of the adjustment output circuit.
Optionally, the feedback circuit includes an optical coupling isolation device, a reference source, a first resistor, a second resistor, a third resistor, and a fourth resistor, a first end of the first resistor, a first end of the third resistor, and a second output end of the third resistor are respectively connected to the second end of the adjustment output circuit, and the second end of the first resistor, the first end of the optical coupling isolation device, and the first end of the second resistor are interconnected; a second end of the second resistor, a second end of the optical coupler isolation device and an output end of the reference source are interconnected; the input end of the reference source is grounded, and the third end of the reference source is interconnected with the second end of the third resistor and the first end of the fourth resistor; a second end of the fourth resistor is grounded; and the third end of the optical coupling isolation device is grounded, and the fourth end of the optical coupling isolation device is the output end of the feedback circuit.
In order to achieve the above object, the present invention further provides an air conditioner controller, which includes the multi-output switching power supply as described above.
In order to achieve the above object, the present invention further provides an air conditioner, which includes the multi-output switching power supply as described above or the air conditioner controller as described above.
The technical scheme includes that the multi-output switching power supply comprises a voltage transformation output circuit, an adjustment output circuit and a feedback regulation circuit, wherein the voltage transformation output circuit is provided with a first output winding, a second output winding and a third output winding, and the adjustment output circuit is provided with a first output end, a second output end and a third output end and is used for outputting a second direct current power supply through the second output end after alternating current superposition and rectification are carried out on alternating current power supply signals of the second output winding and the third output winding; and the second direct-current power supply and the alternating-current power supply signal on the first output winding are subjected to alternating-current and direct-current superposition and rectified to output a first direct-current power supply through the first output end, and the second direct-current power supply and the alternating-current power supply signal on the third output winding are also subjected to rectification to output a third direct-current power supply through the third output end. The feedback adjusting circuit samples the second direct current power supply output by the second output end and adjusts the voltage transformation output circuit according to the sampling signal so as to control the voltage of the first direct current power supply, the second direct current power supply and the third direct current power supply. In the above embodiment, the output circuit is adjusted to output the alternating current power signals output by the first output winding, the second output winding and the third output winding of the voltage transformation output circuit after different current superposition rectification, so that the first direct current power supply, the second direct current power supply and the third direct current power supply which are output finally can be adjusted through one-way feedback, and the coupling performance is improved, because the second direct current power supply which is collected at this time is formed by current superposition rectification of the alternating current power signal of the second output winding and the alternating current power signal of the third output winding, one-way sampling and multi-way feedback regulation can be realized through the process, the coupling performance between each voltage output is improved through one-way sampling and overall regulation of the output first direct current power supply, the second direct current power supply and the third direct current power supply, and the problem of poor feedback stability of multi-way sampling is avoided, the technical problem that the stability of the output voltage after the feedback regulation of the switching power supply with multi-path output is poor can be solved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic block diagram of a switching power supply according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a multi-output switching power supply according to an embodiment of the invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention, and if there is a description related to "first", "second", and the like in the embodiments of the present invention, the description of "first", "second", and the like is only used for descriptive purposes and is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
The invention provides a multi-output switching power supply, and aims to solve the technical problem that the stability of output voltage after feedback regulation of the multi-output switching power supply is poor.
In one embodiment, as shown in fig. 1 and fig. 2, the switching power supply with multiple outputs includes a transformer output circuit 20, a regulation output circuit 30 and a feedback regulation circuit 1010, wherein the transformer output circuit 20 has a first output winding N1, a second output winding N2 and a third output winding N3. The adjustment output circuit 30 has a first output terminal, a second output terminal, and a third output terminal.
The adjustment output circuit 30 outputs a second dc power through the second output terminal vout2 after ac superposition and rectification of the ac power signal of the second output winding N2 and the ac power signal of the third output winding, outputs a first dc power through the first output terminal vout1 after ac/dc superposition and rectification of the ac power signal of the second dc power and the first output winding N1, and outputs a third dc power through the third output terminal vout3 after rectification of the ac power signal of the third output winding N3. The feedback adjusting circuit 10 samples the second dc power outputted from the second output terminal vout2, and adjusts the transformer output circuit 20 according to the sampling signal to control the voltages of the first dc power, the second dc power, and the third dc power. In the above embodiment, the output circuit 30 is adjusted to output the ac power signal of the first output winding N1, the ac power signal of the second output winding N2, and the ac power signal of the third output winding N3 of the transformer output circuit 20 after performing different current superposition rectification, so that the finally output third dc power, second dc power, and first dc power can all be adjusted by one-way feedback, i.e., sampling the second dc power feedback adjustment, because the coupling between the three output voltages is improved by adjusting the output circuit 30, i.e., because the second dc power collected at this time is formed by performing current superposition rectification on the ac power signal of the second output winding N2 and the ac power signal of the third output winding N3, one-way sampling, multi-way feedback adjustment can be realized through this process, and the first dc power output by the overall adjustment is obtained by one-way sampling, The second direct-current power supply and the third direct-current power supply improve the coupling between each voltage output, avoid the problem of poor multi-path sampling feedback stability, and solve the technical problem of poor output voltage stability after the multi-path output switching power supply is subjected to feedback regulation. According to the scheme, the number of feedbacks is reduced by adding the output adjusting circuit, and the stability of a plurality of output voltages is also improved.
It should be noted that any connection relationship for realizing signal transmission among the above functional circuits may be used, and is not limited, in this embodiment, the following connection relationship is used for realizing signal transmission among the above functional circuits, specifically, the transformer output circuit 20 has a primary input terminal, a secondary input terminal, a first output terminal, a second output terminal, and a third output terminal, the adjustment output circuit 30 further includes a first input terminal, a second input terminal, and a third input terminal, the primary input terminal of the transformer output circuit 20 is connected with the output terminal of the feedback adjustment circuit 10, the secondary input terminal of the transformer output circuit 20 is connected with the second output terminal vout2 of the adjustment output circuit 30, the first output terminal of the transformer output circuit 20 is connected with the first input terminal of the adjustment output circuit 30, the second output terminal of the transformer output circuit 20 is connected with the second input terminal of the adjustment output circuit 30, a third output terminal of the transformer output circuit 20 is connected to a third input terminal of the adjustment output circuit 30.
Optionally, the second output winding N2 and the third output winding N3 are connected in series.
When the second output winding N2 and the third output winding N3 are connected in series, the voltage of the ac power signal output by the second output winding N2 and the voltage of the ac power signal output by the third output winding N3 are in a multiple relationship, and it can be understood that, based on the principle of a transformer, the voltage ratio is equal to the turn ratio, that is, assuming that the number of coils of the second output winding N2 is N and the number of coils of the third output winding N3 is M, the ratio of the voltage of the ac power signal output by the second output winding N2 to the voltage of the ac power signal output by the third output winding N3 is N: m, at this time, the voltage base value is set to 1, the voltage of the ac power signal outputted from the third output winding N3 is set to MV, the voltage of the ac power signal outputted from the second output winding N2 is set to (M + N) V, and if the number of coils of the first output winding N1 is P at this time, the first dc power is set to (P + M + N) V, and therefore, it can be found from the above-mentioned process that, when the second output winding N2 and the third output winding N3 are connected in series, each voltage value outputted from the first output winding N1, the second output winding N2, and the third output winding N3 is related to the voltage of the ac power signal outputted from the second output winding N2 and the voltage of the ac power signal outputted from the third output winding N3, and the adjustment of the voltage of the ac power signal outputted from the second output winding N2 and the voltage of the ac power signal outputted from the third output winding N3 can be realized by the feedback circuit, thereby, the coupling between each voltage output can be improved, the number of feedback voltages can be reduced by adding an output adjusting circuit, and the stability of a plurality of output voltages can be improved. It should be noted that, alternatively, the first dc power supply and the second dc power supply may be set to two similar values as required, and the number of coils of the first output winding N1 at this time may be set to a smaller value, so as to reduce the value of the voltage of the ac power supply signal output by the superimposed first output winding N1, so as to further increase the stability of the output first dc power supply.
Alternatively, the specific connection relationship between the windings may refer to the scheme that the first end of the first output winding N1 is the secondary input end of the voltage transformation output circuit 20, and the second end of the first output winding N1 is the first output end of the voltage transformation output circuit 20; the first end of the second output winding N2 is the second output end of the transformation output circuit 20, the second end of the second output winding N2 is connected with the first end of the third output winding N3, and the connection node is the third output end of the transformation output circuit 20; the second end of the third output winding N3 is grounded, and the second output end of the transformation output circuit 20 is connected with the sampling end of the feedback regulation circuit 10
Optionally, the primary input winding N4, the first output winding N1, the second output winding N2 and the third output winding N3 form a transformer. During the actual design, can also design multiple winding mode to form a transformer to multiplexed output to can convenience of customers directly choose for use corresponding transformer just can carry out switching power supply's design fast when in-service use.
Optionally, the transformer output circuit 20 further comprises a primary input winding N4, and the first end of the primary input winding N4 is the primary input end of the transformer output circuit 20.
Alternatively, as shown in fig. 2, the adjustment output circuit 30 includes a first output circuit 301, a second output circuit 302 and a third output circuit 303, an input terminal of the first output circuit 301 is a first input terminal of the adjustment output circuit 30, and an output terminal of the first output circuit 301 is a first output terminal vout1 of the adjustment output circuit 30; the input terminal of the second output circuit 302 is the second input terminal of the adjustment output circuit 30, and the output terminal of the second output circuit 302 is the second output terminal vout2 of the adjustment output circuit 30; the input terminal of the third output circuit 303 is the third input terminal of the adjustment output circuit 30, and the output terminal of the third output circuit 303 is the third output terminal vout3 of the adjustment output circuit 30.
The first output circuit 301 outputs the second dc power and the voltage of the ac power signal output by the first output winding N1 as the first dc power after ac/dc superposition rectification. The second output circuit 302 outputs the ac power signal on the second output winding N2 and the ac power signal on the third output winding N3 as a second dc power after ac superposition and rectification. The third output circuit 303 rectifies the ac power signal on the third output winding and outputs the rectified ac power signal as a third dc power. The three power supplies output by the first output circuit 301, the second output circuit 302 and the third output circuit 303 are related to each other to form related variables, so that the stability of the voltages of the other two power supplies can be improved by calibrating one of the three power supplies, and since the voltages of the three power supplies are determined to be in a positive correlation relationship due to the special arrangement of the circuits in the first output circuit 301, the second output circuit 302 and the third output circuit 303, that is, one of the feedback adjustments is accurate, the other two power supplies also improve the accuracy and improve the coupling between the other two power supplies, and when the circuit is applied to actual life, if the circuit is adopted in multiple ways, each sampling accuracy may be different, and the feedback adjustments are likely to be mutually exclusive, and the related protection of the sampling circuits is also performed, which results in the circuit being very complex, and in this application, ingenious setting through output circuit for the voltage of three power presents positive correlation, just can improve all output power's stability naturally through one of them output power stability of feedback regulation, and the circuit is comparatively simple, can reduce the cost of in-service use by a wide margin. It should be noted that, according to the principle of the present invention, the number of output power supplies may also be increased in the solution of the present application, at this time, the output circuit is expanded into multiple paths, the connection relationship and number of windings of the transformer output circuit 20 are correspondingly changed, and then the number of output paths and connection relationship of the adjustment output circuit 30 are changed, so that a more-path output may also be implemented.
Alternatively, as shown in fig. 2, the first output circuit 301 includes a first diode D1 and a first capacitor C1, an anode of the first diode D1 is an input terminal of the first output circuit 301, a cathode of the first diode D1 is connected to a first terminal of the first capacitor C1, a connection node of the first diode D1 is an output terminal of the first output circuit 301, and a second terminal of the first capacitor C1 is grounded.
The first diode D1 rectifies a power signal obtained by superimposing an alternating current and a direct current on a second direct current power supply and an alternating current power supply signal on the first output winding N1, and the first capacitor C1 filters noise waves.
Optionally, as shown in fig. 2, the second output circuit 302 includes a second diode D2 and a second capacitor C2, an anode of the second diode D2 is an input terminal of the second output circuit 302, a cathode of the second diode D2 is connected to a first terminal of a second capacitor C2, a connection node of the first diode D2 is an output terminal of the second output circuit 302, and a second terminal of the second capacitor C2 is grounded. The second diode D rectifies the power signal obtained by alternating current superposition of the alternating current power signal on the second output winding N2 and the alternating current power signal on the third output winding N3, and the second capacitor C2 filters noise.
Optionally, as shown in fig. 2, the third output circuit 303 includes a third diode D3 and a third capacitor C3, an anode of the third diode D3 is an input terminal of the third output circuit 303, a cathode of the third diode D3 is connected to a first terminal of a third capacitor C3, a connection node of the first terminal is an output terminal of the third output circuit 303, and a second terminal of the third capacitor C3 is grounded. The third diode D3 rectifies the ac power signal on the third output winding N3, and the third capacitor C3 filters noise.
It should be noted that, in order to achieve better coupling performance and ensure the stability of the first dc power supply, the second dc power supply, and the third dc power supply that feedback-regulate the output, the output voltage of the switching power supply may be limited according to the following parameters and in combination with practical application occasions.
Optionally, the voltage of the second dc power supply is less than the voltage of the first dc power supply.
Since the first dc power supply is actually a dc second dc power supply, which superimposes the ac power signal on the first output winding N1 and rectifies the output dc voltage, a better coupling can be obtained, and at this time, the stability of the output voltage is better. When the second direct current power supply is smaller than the first direct current power supply, the superposition accuracy and reliability can be ensured, and the accuracy of the user connection circuit can be detected according to the process.
Optionally, the voltage of the third dc power supply is less than the voltage of the second dc power supply.
Since the second dc power supply is actually a dc voltage which is output by rectifying the ac power signal on the second output winding N2 superimposed on the ac power signal on the third output winding N3, the coupling of the transformer where the corresponding winding is located can be enhanced, and the stability of the output voltage is better. When the third direct current power supply is smaller than the second direct current power supply, the superposition accuracy and reliability can be ensured, and the accuracy of the user connection circuit can be detected according to the process.
Alternatively, when the number of coils of the second output winding N2 is N and the number of coils of the third output winding N3 is M, the voltage of the ac power signal of the second output winding N2 is NV, and the voltage of the ac power signal of the third output winding N3 is MV, the voltage of the second dc power is the sum of the absolute value of NV and the absolute value of MV. I.e., the voltage of the second dc power source | NV | + | MV |.
When the test is carried out, the accuracy of the plurality of windings and the connecting circuit can be verified through the formula.
Alternatively, when the number of coils of the first output winding N1 is P and the voltage of the third output winding N3 is Pv, the voltage of the first dc power supply is the sum of the absolute values of the voltage of the second dc power supply and the voltage of the ac power supply signal of the third output winding N3, that is, the first dc power supply is equal to the sum of the absolute value of NV, the absolute value of MV, and the absolute value of Pv. When the test is carried out, the accuracy of the plurality of windings and the connecting circuit can be verified through the formula. That is, the voltage of the first dc power supply | NV | + | MV | + | Pv |.
Alternatively, as shown in fig. 2, the feedback regulating circuit 10 includes a control circuit 101 and a feedback circuit 102, an output terminal of the control circuit 101 is an output terminal of the feedback regulating circuit 10, a feedback signal terminal of the control circuit 101 is connected to an output terminal of the feedback circuit 102, and a sampling terminal of the feedback circuit 102 is connected to the second output terminal vout2 of the adjustment output circuit 30.
The feedback circuit 102 collects the real-time voltage value of the second dc power supply and feeds the real-time voltage value back to the control circuit 101, and the control circuit 101 adjusts the voltage value output to the primary input winding N4 according to the fed-back real-time voltage value, so as to adjust the voltage value of the ac power supply signal output by each winding, thereby implementing the process of feedback adjustment.
Optionally, as shown in fig. 2, the feedback circuit 102 includes an optical coupling isolation device IC2, a reference source IC3, a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4, a first end of the first resistor R1 and a first end of the third resistor R3 are respectively connected to the second output terminal of the adjustment output circuit 30, and a second end of the first resistor R1, a first end of the optical coupling isolation device IC2, and a first end of the second resistor R2 are interconnected; a second end of the second resistor R2, a second end of the optically-coupled isolation device IC2 and an output end of the reference source IC3 are interconnected; the input end of the reference source IC3 is grounded, and the third end of the reference source IC3 is interconnected with the second end of the third resistor R3 and the first end of the fourth resistor R4; a second end of the fourth resistor R4 is grounded; the third end of the optical coupling isolation device IC2 is grounded, and the fourth end of the optical coupling isolation device IC2 is the output end of the feedback circuit 102.
The first end of the first resistor R1 is connected to the second output end of the adjustment output circuit 30 to provide power to the opto-isolator IC2, and the third resistor R3 is a sampling resistor. Reference source IC3 will sample the current signal output, can guarantee simultaneously that the voltage of output to opto-isolator IC2 is at a stable value, receives the influence of sampling current, and first resistance R1, second resistance R2, third resistance R3 and fourth resistance R4 are used for the sampling partial pressure, and opto-isolator IC2 transmits the sampling voltage to control circuit 101 to realize the sampling. Through the circuit, sampling can be stably carried out, overcurrent protection can be carried out on the sampling circuit under extreme conditions, and the circuit is prevented from being damaged.
Alternatively, the control circuit 101 may be selected from the operating chip IC1 of various switching power supplies.
In order to achieve the above object, the present invention further provides an air conditioner controller, which includes the above switching power supply with multiple outputs.
It should be noted that, since the air conditioner controller of the present invention includes all embodiments of the multi-output switching power supply, the air conditioner controller of the present invention has all the advantages of the multi-output switching power supply, and the details are not repeated herein.
In order to achieve the above object, the present invention further provides an air conditioner, which includes the above multi-output switching power supply or the above air conditioner controller.
It should be noted that, since the air conditioner of the present invention includes all embodiments of the multi-output switching power supply or the air conditioner controller, the air conditioner of the present invention has all the advantages of the multi-output switching power supply or the air conditioner controller, and further description thereof is omitted.
It should be noted that the air conditioner may include a central air conditioner, a floor air conditioner, a wall-mounted air conditioner, a warm air conditioner, a cool air conditioner, and the like.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (15)
1. A multiple-output switching power supply, comprising:
a voltage transformation output circuit having a first output winding, a second output winding and a third output winding;
the adjusting output circuit is provided with a first output end, a second output end and a third output end and is used for outputting a second direct current power supply through the second output end after alternating current superposition and rectification are carried out on alternating current power supply signals of the second output winding and the third output winding; the second direct-current power supply and the alternating-current power supply signal on the first output winding are subjected to alternating-current and direct-current superposition and rectified, and then the first direct-current power supply is output through the first output end, and the second direct-current power supply and the alternating-current power supply signal on the third output winding are rectified and then the third direct-current power supply is output through the third output end;
and the feedback regulating circuit is used for sampling the second direct-current power supply output by the second output end and regulating the voltage transformation output circuit according to the sampling signal so as to control the voltage of the first direct-current power supply, the second direct-current power supply and the third direct-current power supply.
2. The multiple-output switching power supply according to claim 1, wherein the transformer output circuit has a primary input terminal, a secondary input terminal, a first output terminal, a second output terminal, and a third output terminal, the transformer output circuit further comprises a primary input winding, the first terminal of the primary input winding is the primary input terminal of the transformer output circuit, the regulator output circuit further comprises a first input terminal, a second input terminal, and a third input terminal, the primary input terminal of the transformer output circuit is connected to the output terminal of the feedback regulation circuit, the secondary input terminal of the transformer output circuit is connected to the second output terminal of the regulator output circuit, the first output terminal of the transformer output circuit is connected to the first input terminal of the regulator output circuit, and the second output terminal of the transformer output circuit is connected to the second input terminal of the regulator output circuit, and the third output end of the voltage transformation output circuit is connected with the third input end of the adjustment output circuit.
3. The multi-output switching power supply according to claim 2, wherein the second output winding and the third output winding are connected in series;
the first end of the first output winding is a secondary input end of the voltage transformation output circuit, and the second end of the first output winding is a first output end of the voltage transformation output circuit; the first end of the second output winding is the second output end of the voltage transformation output circuit, the second end of the second output winding is connected with the first end of the third output winding, and the connection node of the second output winding is the third output end of the voltage transformation output circuit; the second end of the third output winding is grounded, and the second output end of the voltage transformation output circuit is connected with the sampling end of the feedback regulation circuit.
4. The multi-output switching power supply according to claim 2, wherein the regulation output circuit comprises a first output circuit, a second output circuit and a third output circuit, the input terminal of the first output circuit is the first input terminal of the regulation output circuit, and the output terminal of the first output circuit is the first output terminal of the regulation output circuit; the input end of the second output circuit is the second input end of the adjustment output circuit, and the output end of the second output circuit is the second output end of the adjustment output circuit; the input end of the third output circuit is a third input end of the adjustment output circuit, and the output end of the third output circuit is a third output end of the adjustment output circuit;
the first output circuit is used for performing alternating current and direct current superposition on a second direct current power supply and an alternating current power supply signal on the first output winding, rectifying the alternating current power supply signal and outputting the alternating current power supply signal as a first direct current power supply;
the second output circuit is used for performing alternating current superposition and rectification on the alternating current power supply signal on the second output winding and the alternating current power supply signal on the third output winding and outputting the alternating current power supply signal and the alternating current power supply signal as a second direct current power supply;
and the third output circuit is used for rectifying the alternating current power supply signal on the third output winding and outputting the rectified alternating current power supply signal as a third direct current power supply.
5. The multi-output switching power supply according to claim 4, wherein the first output circuit comprises a first diode and a first capacitor, the anode of the first diode is the input terminal of the first output circuit, the cathode of the first diode is connected to the first terminal of the first capacitor, the connection node thereof is the output terminal of the first output circuit, and the second terminal of the first capacitor is grounded.
6. The multi-output switching power supply according to claim 4, wherein the second output circuit comprises a second diode and a second capacitor, an anode of the second diode is an input terminal of the second output circuit, a cathode of the second diode is connected to a first terminal of the second capacitor, a connection node thereof is an output terminal of the second output circuit, and a second terminal of the second capacitor is grounded.
7. The multi-output switching power supply according to claim 4, wherein the third output circuit comprises a third diode and a third capacitor, an anode of the third diode is an input terminal of the third output circuit, a cathode of the third diode is connected to a first terminal of the third capacitor, a connection node thereof is an output terminal of the third output circuit, and a second terminal of the third capacitor is grounded.
8. The multi-output switching power supply according to claim 1, wherein the voltage of the second dc power supply is smaller than the voltage of the first dc power supply.
9. The multi-output switching power supply according to claim 1, wherein a voltage of the third dc power supply is smaller than a voltage of the second dc power supply.
10. A multiple-output switching power supply according to any one of claims 1-9, wherein when the number of coils of said second output winding is N and the number of coils of said third output winding is M, the voltage of the ac power signal of said second output winding is NV, and the voltage of the ac power signal of said third output winding is MV, the voltage of said second dc power supply is the sum of the absolute value of NV and the absolute value of MV.
11. The multi-output switching power supply according to claim 10, wherein when the number of coils of the first output winding is P and the voltage of the third output winding is Pv, the voltage of the first dc power supply is a sum of an absolute value of a voltage of the second dc power supply and an absolute value of a voltage of the ac power supply signal of the third output winding, that is, the voltage of the first dc power supply is equal to a sum of an absolute value of NV, an absolute value of MV, and an absolute value of Pv.
12. The multi-output switching power supply according to claim 2, wherein the feedback regulating circuit comprises a control circuit and a feedback circuit, the output terminal of the control circuit is the output terminal of the feedback regulating circuit, the feedback signal terminal of the control circuit is connected to the output terminal of the feedback circuit, and the sampling terminal of the feedback circuit is connected to the second output terminal of the regulation output circuit.
13. The multi-output switching power supply according to claim 12, wherein the feedback circuit includes an optical coupling isolation device, a reference source, a first resistor, a second resistor, a third resistor, and a fourth resistor, a first end of the first resistor and a first end of the third resistor are respectively connected to the second output terminal of the regulation output circuit, and a second end of the first resistor, a first end of the optical coupling isolation device, and a first end of the second resistor are interconnected; a second end of the second resistor, a second end of the optical coupling isolation device and an output end of the reference source are interconnected; the input end of the reference source is grounded, and the third end of the reference source is interconnected with the second end of the third resistor and the first end of the fourth resistor; a second end of the fourth resistor is grounded; and the third end of the optical coupling isolation device is grounded, and the fourth end of the optical coupling isolation device is the output end of the feedback circuit.
14. An air conditioner controller, characterized in that the air conditioner controller comprises a multi-output switching power supply according to any one of claims 1 to 13.
15. An air conditioner characterized in that it comprises a multi-output switching power supply according to any one of claims 1 to 13 or an air conditioner controller according to claim 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011587622.0A CN114759793A (en) | 2020-12-28 | 2020-12-28 | Multi-output switching power supply, air conditioner controller and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011587622.0A CN114759793A (en) | 2020-12-28 | 2020-12-28 | Multi-output switching power supply, air conditioner controller and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404892A (en) * | 2023-06-08 | 2023-07-07 | 深圳市斯康达电子有限公司 | Multi-output AC-DC converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116404892A (en) * | 2023-06-08 | 2023-07-07 | 深圳市斯康达电子有限公司 | Multi-output AC-DC converter |
| CN116404892B (en) * | 2023-06-08 | 2023-10-03 | 深圳市斯康达电子有限公司 | Multi-output AC-DC converter |
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