WO2021139093A1 - 一种多路谐振变换电路及基于多路谐振变换电路的多路输出控制方法 - Google Patents

一种多路谐振变换电路及基于多路谐振变换电路的多路输出控制方法 Download PDF

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WO2021139093A1
WO2021139093A1 PCT/CN2020/096931 CN2020096931W WO2021139093A1 WO 2021139093 A1 WO2021139093 A1 WO 2021139093A1 CN 2020096931 W CN2020096931 W CN 2020096931W WO 2021139093 A1 WO2021139093 A1 WO 2021139093A1
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circuit
output
electrical signal
sum
output terminal
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PCT/CN2020/096931
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English (en)
French (fr)
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毛昭祺
王纪周
柯乃泉
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毛昭祺
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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
    • 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
    • H02M1/0003—Details of control, feedback or regulation circuits
    • 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
    • H02M1/0083—Converters characterised by their input or output configuration
    • H02M1/009—Converters characterised by their input or output configuration having two or more independently controlled outputs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to the field of resonant converters, in particular to a multiple-channel resonant converter circuit and a multiple-channel output control method based on the multiple resonant converter circuit.
  • LED Light-Emitting Diode
  • the LED converter converts the input AC power into DC power and supplies it to the LED load.
  • LED driver There are two main types of LED converters on the market, one is an LED driver that outputs a constant current, and the other is an LED driver that outputs a constant voltage.
  • the embodiment of the present application provides a multi-channel resonant conversion circuit, wherein the circuit includes: a first switch tube, a second switch tube, a resonance circuit, a transformer, at least one output circuit group, and a control circuit;
  • the first switching tube is connected to the second switching tube, and both the first switching tube and the second switching tube are connected to the resonance circuit;
  • the transformer includes a primary winding and at least one secondary winding pair, the primary winding is connected to the resonance circuit, and at least one secondary winding pair is connected to at least one output circuit group;
  • Each output circuit group in the at least one output circuit group has a first output terminal, a second output terminal, and a third output terminal;
  • the third output terminal is connected with the control circuit
  • the control circuit is respectively connected with the first switch tube and the second switch tube, and the control circuit is used to control the working frequency of the first switch tube and the working frequency of the second switch tube, so that the sum of the first electrical signals output by the first output terminal
  • the sum of the second electrical signal output from the second output terminal is equal to the total value of the preset electrical signal
  • the control circuit is also used to control the duty cycle data of the first switch tube and the duty cycle data of the second switch tube.
  • the magnitude is such that the ratio of the sum of the first electrical signals output by the first output terminal and the sum of the second electrical signals output by the second output terminal is equal to the preset electrical signal ratio.
  • control circuit includes: a drive generation circuit, a voltage-controlled oscillation circuit, a duty cycle control circuit, and an operational amplifier circuit;
  • the operational amplifier circuit is connected to the voltage-controlled oscillation circuit, and the operational amplifier circuit is used for the preset total value of the electrical signal according to the sum of the first electrical signal output from the first output terminal and the sum of the second electrical signal output from the second output terminal The difference value determines the feedback electrical signal;
  • the voltage-controlled oscillation circuit is connected to the drive generating circuit, and the voltage-controlled oscillation circuit is used to generate a frequency control signal according to the feedback electrical signal;
  • the drive generating circuit is used to control the operating frequency of the first switching tube and the operating frequency of the second switching tube according to the frequency control signal;
  • the duty ratio control circuit is connected to the drive generating circuit, and the duty ratio control circuit is used to generate the duty ratio control signal;
  • the drive generating circuit is also used to control the duty cycle data of the first switch tube and the duty cycle data of the second switch tube according to the duty cycle control signal, thereby controlling the sum of the first electrical signal output by the first output terminal and the second
  • the ratio of the sum of the second electrical signals output by the output terminal is such that the ratio is equal to the preset electrical signal ratio.
  • the resonance circuit includes an inductor and a capacitor
  • the second end of the first switch tube or the first end of the second switch tube is sequentially connected to the inductor, the primary winding, the capacitor, and the second end of the second switch tube to form a half-bridge circuit.
  • each secondary winding pair in the at least one secondary winding pair includes a first secondary winding and a second secondary winding
  • Each output circuit group in the at least one output circuit group includes a first half-wave rectifier circuit and a second half-wave rectifier circuit.
  • the first half-wave rectifier circuit is connected to the first secondary winding, and the second half-wave rectifier circuit is connected to the second half-wave rectifier circuit.
  • the positive terminal of the first half-wave rectifier circuit is the first output terminal
  • the positive terminal of the second half-wave rectifier circuit is the second output terminal
  • the negative terminal of the first half-wave rectifier circuit is connected to the negative terminal of the second half-wave rectifier circuit and Grounded
  • the negative terminal of the first half-wave rectifier circuit is connected to the negative terminal of the second half-wave rectifier circuit to lead to a third output terminal.
  • each output circuit group in the at least one output circuit group further includes a detection resistor
  • the first end of the detection resistor is connected with the negative end of the first half-wave rectifier circuit, the first end of the detection resistor is connected with the negative end of the second half-wave rectifier circuit, and the second end of the detection resistor is connected with the third output end.
  • the circuit includes N output circuit groups, the transformer includes N secondary winding pairs, and the N output circuit groups correspond to the N secondary winding pairs one-to-one; N is an integer greater than or equal to 2, and N output circuit groups Including N-1 adjacent output circuit groups, and including 2 (N-1) shunt inductor groups.
  • the shunt inductor group includes a first shunt inductor and a second shunt inductor;
  • the adjacent output circuit group includes a first output circuit group and a second output circuit group;
  • the first shunt inductor is located in the first half-wave rectifier circuit of the first output circuit group of the adjacent output circuit group corresponding to the shunt inductor group, and the second shunt inductor is located in the second output circuit of the adjacent output circuit group corresponding to the shunt inductor group In the first half-wave rectifier circuit of the group; or; the first shunt inductor is located in the second half-wave rectifier circuit of the first output circuit group of the adjacent output circuit group corresponding to the shunt inductor group, and the second shunt inductor is located in the shunt inductor group Corresponding to the second half-wave rectifier circuit of the second output circuit group of the adjacent output circuit group.
  • the sum of the first electrical signal output by the first output terminal of each output circuit group in the at least one output circuit group and the second electrical signal output by the second output terminal of each output circuit group in the at least one output circuit group is equal to the preset ratio of the electrical signals.
  • the embodiment of the present application also provides a multiple output control method based on a multiple resonant converter circuit, the method includes:
  • the above method also includes:
  • a multi-channel resonant conversion circuit and a multi-channel output control method based on the multi-channel resonant conversion circuit disclosed in the embodiments of the present application wherein the circuit includes a first switch tube, a second switch tube, a resonance circuit, a transformer, and at least one output The circuit group and the control circuit, wherein the first switch tube is connected to the second switch tube, the first switch tube and the second switch tube are both connected to the resonant circuit, the transformer includes a primary winding and at least one secondary winding pair, the primary winding Connected to the resonance circuit, at least one secondary winding pair is connected to at least one output circuit group, each output circuit group in the at least one output circuit group has a first output terminal, a second output terminal, and a third output terminal, and the third output terminal Connected with the control circuit, the control circuit is respectively connected with the first switching tube and the second switching tube, the control circuit is used to control the operating frequency of the first switching tube and the operating frequency of the second switching tube, so that the first output terminal output
  • the size of the duty cycle data is such that the ratio of the sum of the first electrical signal output from the first output terminal to the sum of the second electrical signal output from the second output terminal is equal to the preset electrical signal ratio.
  • the operating frequency of the first switching tube and the operating frequency of the second switching tube are controlled by the control circuit, so that the first output terminal and the second output terminal constantly output electrical signals according to a preset ratio, and the total output electrical signals are The value is equal to the total value of the preset electrical signal, which can achieve the technical effect of multiple outputs of the same driver at the same time.
  • Fig. 1 is a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the present application
  • FIG. 2 is a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the present application
  • Fig. 3 is a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the present application
  • Fig. 5 is a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the present application.
  • FIG. 6 is a partial waveform diagram of the duty cycle data D1 of the first switching tube and the duty cycle data D2 of the second switching tube provided by an embodiment of the present application;
  • FIG. 7 is a schematic flowchart of a multiple output control method provided by an embodiment of the present application.
  • the “embodiment” referred to herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present application.
  • the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the indicated technical features. Quantity. Thus, the features defined with “first” and “second” may explicitly or implicitly include one or more of these features. Moreover, the terms “first”, “second”, etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.
  • FIG. 1 shows a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the application.
  • the circuit shown in the figure includes a first switching tube 1, a second switching tube 2, a resonance circuit 3, and a transformer 4.
  • At least one output circuit group 5 and control circuit 6, wherein the first switch tube 1 is connected to the second switch tube 2, the first switch tube 1 and the second switch tube 2 are both connected to the resonant circuit 3, and the transformer 4 includes the primary side Winding 41 and at least one secondary winding pair 42, the primary winding 41 is connected to the resonance circuit 3, at least one secondary winding pair 42 is connected to at least one output circuit group 5, and each output circuit group in the at least one output circuit group 5 has The first output terminal 51, the second output terminal 52 and the third output terminal 53, the third output terminal 53 is connected to the control circuit 6, and the control circuit 6 is respectively connected to the first switch tube 1 and the second switch tube 2, and the control circuit 6 Used to control the operating frequency of the first switching tube 1 and the operating frequency of the second switching tube 2, so
  • the operating frequency of the first switching tube and the operating frequency of the second switching tube are controlled by the control circuit, so that the first output terminal and the second output terminal are constantly output according to a preset ratio Electrical signal, and the total value of the output electrical signal is equal to the total value of the preset electrical signal, which can achieve the technical effect of multiple outputs of the same driver at the same time.
  • FIG. 2 shows a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the application.
  • the figure includes a first switching tube 1, a second switching tube 2, a resonance circuit 3, a transformer 4, at least one output circuit group 5 and a control circuit 6.
  • the first switching tube 1 is connected to the second switching tube 2
  • the first switching tube 1 is connected to the second switching tube 2.
  • the switching tube 1 and the second switching tube 2 are both connected to the resonant circuit 3.
  • the transformer 4 includes a primary winding 41 and at least one secondary winding pair 42.
  • the primary winding 41 is connected to the resonant circuit 3, and at least one secondary winding pair 42 is connected to At least one output circuit group 5 is connected.
  • Each output circuit group in the at least one output circuit group 5 has a first output terminal 51, a second output terminal 52, and a third output terminal 53, and the third output terminal 53 is connected to the control circuit 6,
  • the control circuit 6 is respectively connected to the first switch tube 1 and the second switch tube 2.
  • the control circuit 6 is used to control the operating frequency of the first switch tube 1 and the operating frequency of the second switch tube 2, so that the output of the first output terminal 51
  • the sum of the first electrical signal and the sum of the second electrical signal output from the second output terminal 52 can be output constantly, and the sum of the first electrical signal output from the first output terminal 51 and the second electrical signal output from the second output terminal 52
  • the sum of the electrical signals is equal to the total value of the preset electrical signals
  • the control circuit 6 is also used to control the duty cycle data of the first switching tube 1 and the duty cycle data of the second switching tube 2, so that the first The ratio of the sum of the first electrical signal output by the output terminal 51 and the sum of the second electrical signal output by the second output terminal 52 is equal to the preset electrical signal ratio.
  • the control circuit 6 includes a drive generation circuit 61, a voltage-controlled oscillation circuit 62, a duty cycle control circuit 63, and an operational amplifier circuit 64.
  • the operational amplifier circuit 64 is connected to the voltage-controlled oscillation circuit 62, and the operational amplifier circuit 64 is used to determine the feedback electrical signal according to the difference between the sum of the sum of the first electrical signal output by the first output terminal 51 and the sum of the second electrical signal output by the second output terminal 52 and the total value of the preset electrical signal, voltage control
  • the oscillating circuit 62 is connected to the driving generating circuit 61.
  • the voltage-controlled oscillating circuit 62 is used to generate a frequency control signal according to the feedback electrical signal, and the driving generating circuit 61 is used to control the operating frequency of the first switching tube 1 and the second switching tube according to the frequency control signal.
  • the duty cycle control circuit 63 is connected to the drive generation circuit 61, the duty cycle control circuit 63 is used to generate a duty cycle control signal, and the drive generation circuit is also used to control the first switch tube according to the duty cycle control signal
  • the duty cycle data of 1 and the duty cycle data of the second switch tube 2 further control the ratio of the sum of the first electrical signal output by the first output terminal 51 and the sum of the second electrical signal output by the second output terminal 52, Make the ratio equal to the preset electrical signal ratio.
  • the control circuit 6 detects the total current value output by the first output terminal 51 and the second output terminal 52, and compares the total current value with the total value of the preset electrical signal, that is, compares the total current value with the expected value Vref , and amplifies the operation.
  • the circuit 64 determines the feedback electrical signal according to the difference between the total current value and the expected value.
  • the feedback electrical signal is input to the voltage-controlled oscillation circuit 62.
  • the voltage-controlled oscillation circuit 62 generates a frequency control signal according to the feedback electrical signal, so that the first switch tube 1 works The frequency and the operating frequency of the second switch tube 2 change with the change of the feedback electrical signal, thereby making the total current equal to the expected value.
  • the working frequency of the first switching tube 1 and the working frequency of the second switching tube 2 are equal, and the voltage-controlled oscillation circuit 62 determines the working frequency of the first switching tube 1 and the working frequency of the second switching tube 2 according to the above-mentioned feedback electrical signal.
  • the size of the frequency is equal.
  • the resonance circuit 3 includes an inductor 31 and a capacitor 32.
  • the inductor 31 is connected in series with the capacitor 32, and is connected in series with the primary winding 41 of the transformer 4.
  • each secondary winding pair in the at least one secondary winding pair 42 described above includes a first secondary winding and a second secondary winding
  • the at least one output circuit group 5 described above is
  • Each output circuit group includes a first half-wave rectifier circuit and a second half-wave rectifier circuit.
  • the first half-wave rectifier circuit is connected with the first secondary winding
  • the second half-wave rectifier circuit is connected with the second secondary winding
  • the positive terminal of the first half-wave rectifier circuit is the first output terminal 51
  • the second half-wave rectifier circuit is the first output terminal 51.
  • the positive terminal of the rectifier circuit is the second output terminal 52.
  • each output circuit group in the at least one output circuit group 5 described above further includes a detection resistor 54 whose first terminal is connected to the common ground terminal, and the second terminal of the detection resistor 54 is connected to the common negative terminal.
  • the voltage on the detection resistor 54 is the voltage drop between the common negative terminal and the common ground terminal, and the magnitude of the voltage drop represents the sum of the first electrical signal output from the first output terminal and the second electrical signal output from the second output terminal The size of the sum of the sum.
  • the above-mentioned multi-channel resonant conversion circuit includes at least one output circuit group 5, which may be specifically that the circuit includes N output circuit groups 5, and the transformer 4 includes at least one secondary winding pair 42, which may be specifically that the transformer 4 includes N secondary windings.
  • Side winding pairs 42 wherein N output circuit groups 5 correspond to N secondary winding pairs 42 one-to-one; N is an integer greater than or equal to 2, and N output circuit groups 5 include N-1 adjacent output circuit groups , And includes 2 (N-1) shunt inductor groups.
  • Each of the 2 (N-1) shunt inductor groups includes a first shunt inductor and a second shunt inductor
  • the adjacent output circuit group includes a first output circuit group and a second output circuit group.
  • the first shunt inductor The inductor is located in the first half-wave rectifier circuit of the first output circuit group of the adjacent output circuit group corresponding to the shunt inductor group
  • the second shunt inductor is located in the first half-wave rectifier circuit of the second output circuit group of the adjacent output circuit group corresponding to the shunt inductor group.
  • the first shunt inductor is located in the second half-wave rectifier circuit of the first output circuit group of the adjacent output circuit group corresponding to the shunt inductor group, and the second shunt inductor is located in the phase corresponding to the shunt inductor group.
  • the second half-wave rectifier circuit of the second output circuit group adjacent to the output circuit group.
  • the sum of the first electrical signal output by the first output terminal 51 of each output circuit group in the at least one output circuit group 5 described above and each output circuit in the at least one output circuit group 5 The ratio of the sum of the second electrical signals output by the second output terminals 51 of the group is equal to the preset electrical signal ratio.
  • the circuit includes at least one output circuit group 5, where at least one output circuit group 5 may include one output circuit group 5 or multiple output circuit groups 5;
  • the transformer 4 includes the original The side winding 41 and at least one secondary winding pair 42, wherein the at least one secondary winding pair 42 may include one secondary winding pair 42 or multiple secondary winding pairs 42.
  • the number of output circuit groups 5 is consistent with the number of secondary winding pairs 42, and the output circuits in the output circuit 5 correspond to the secondary windings in the secondary winding pairs in a one-to-one correspondence.
  • FIG. 3 it is a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the application.
  • the circuit includes an output circuit group 5, and the transformer 4 includes a primary winding 41 and a secondary winding pair 42.
  • the output circuit group 5 includes a first half-wave rectifier circuit and a second half-wave rectifier circuit.
  • the secondary winding pair 42 includes a first secondary winding and a second secondary winding.
  • the first half-wave rectifier circuit is connected to the first secondary winding.
  • the second half-wave rectifier circuit is connected to the second secondary winding, the positive terminal of the first half-wave rectifier circuit is the first output terminal 51, and the first output terminal 51 is marked as V01; the positive terminal of the second half-wave rectifier circuit is The second output terminal 52, the second output terminal 52 is marked as V02; the negative terminal of the first half-wave rectifier circuit is connected to the negative terminal of the second half-wave rectifier circuit, and the third output terminal 53 is led out, and the third output terminal 53 is marked For V1-.
  • the operational amplifier circuit in the control circuit 6 is based on the difference between the sum of the first electrical signal output from the first output terminal 51 and the second electrical signal output from the second output terminal 52 and the preset electrical signal total value, that is, the detection resistor 54 The difference between the voltage and the expected value determines the feedback electrical signal.
  • the feedback electrical signal is input into the voltage-controlled oscillator circuit 62.
  • the voltage-controlled oscillator circuit 62 generates a frequency control signal according to the feedback electrical signal and inputs it to the drive generating circuit 61.
  • the drive generating circuit 61 controls the frequency according to the frequency.
  • the signal controls the operating frequency of the first switching tube 1 and the operating frequency of the second switching tube 2 so that the sum of the electrical signal output by the first output terminal 51 and the electrical signal output by the second output terminal 52 is equal to the expected value.
  • the drive generating circuit adjusts the duty cycle data of the first switch tube 1 and the duty cycle data of the second switch tube 2 according to the duty cycle control signal provided by the duty cycle control circuit, so that the first output terminal 51 outputs The ratio of the first electrical signal to the second electrical signal output by the second output terminal 52 is equal to the preset electrical signal ratio.
  • the sum of the duty cycle data D1 of the first switch tube and the duty cycle data D2 of the second switch tube is 1.
  • the duty cycle data D1 of the first switch tube and the duty cycle data D2 of the second switch tube are shown in FIG. 4, which shows the duty cycle data D1 of the first switch tube and the duty cycle of the second switch tube.
  • Data D2 part of the waveform diagram.
  • FIG. 5 it is a schematic circuit diagram of a multi-channel resonant conversion circuit provided by an embodiment of the application.
  • the circuit includes three output circuit groups 5, and the transformer 4 includes one primary winding 41 and three secondary winding pairs 42.
  • Each of the three output circuit groups 5 includes a first half-wave rectifier circuit and a second half-wave rectifier circuit, and each of the three secondary winding pairs 42 includes a first secondary winding and a first secondary winding.
  • the first half-wave rectifier circuit in each output circuit group 5 is connected to the first secondary winding in the corresponding secondary winding pair, and the second half-wave rectifier circuit in each output circuit group 5 is connected to The second secondary winding in the corresponding secondary winding pair is connected, and the formed first output terminal 51 is respectively marked as V01, V03 and V05, and the formed second output terminal 52 is respectively marked as V02, V04 and V06.
  • V01 and V02 are the signs of the first output terminal 51 and the second output terminal 52 of the same output circuit group.
  • the negative terminal of the first half-wave rectifier circuit and the negative terminal of the second half-wave rectifier circuit in the output circuit group are Terminal is connected, and leads to the third output terminal 53, the third output terminal 53 is marked as V1-; V03 and V04 are the marks of the first output terminal 51 and the second output terminal 52 of the same output circuit group.
  • the negative terminal of the first half-wave rectifier circuit is connected to the negative terminal of the second half-wave rectifier circuit, and a third output terminal 53, the third output terminal 53 is marked as V2-; V05 and V06 are in the same output circuit group
  • the first output terminal 51 and the second output terminal 52 are marked.
  • the negative terminal of the first half-wave rectifier circuit in the output circuit group is connected to the negative terminal of the second half-wave rectifier circuit, and the third output terminal 53 is led out.
  • the three output terminal 53 is marked as V3-.
  • the above-mentioned three output circuit groups 5 include two adjacent output circuit groups and four shunt inductor groups.
  • Each of the four shunt inductor groups L1, L2, L3, and L4 includes a first shunt inductor and a second shunt inductor.
  • the first shunt inductor L1-1 of the shunt inductor group L1 is located at the first output end V01
  • the second shunt inductor L1-2 of the shunt inductor group L1 is located at the first output terminal V03
  • the first shunt inductor L2-1 of the shunt inductor group L2 is located at the second output terminal V02
  • the second shunt inductor group L2 is located at the second output terminal V02.
  • the shunt inductor L2-2 is located at the second output terminal V04; the first shunt inductor L3-1 of the shunt inductor group L3 is located at the first output terminal V03, and the second shunt inductor L3-2 of the shunt inductor group L3 is located at the first output terminal V05; The first shunt inductor L4-1 of the shunt inductor group L4 is located at the second output terminal V04, and the second shunt inductor L4-2 of the shunt inductor group L4 is located at the second output terminal V06.
  • the operational amplifying circuit in the control circuit 6 is based on the difference between the sum of the sum of the first electrical signal output by the first output terminal 51 and the sum of the second electrical signal output by the second output terminal 52 and the preset total value of the electrical signal, namely The difference between the voltage on the detection resistor 54 and the expected value determines the feedback electrical signal.
  • the feedback electrical signal is input into the voltage-controlled oscillation circuit 62.
  • the voltage-controlled oscillation circuit 62 generates a frequency control signal according to the feedback electrical signal and inputs it to the drive generating circuit 61.
  • the drive generating circuit 61 Control the operating frequency of the first switching tube 1 and the operating frequency of the second switching tube 2 according to the frequency control signal, so that the sum of the electrical signals output by the first output terminal 51 and the sum of the electrical signals output by the second output terminal 52 Equal to the expected value.
  • the drive generating circuit 61 also adjusts the duty cycle data of the first switch tube 1 and the duty cycle data of the second switch tube 2 according to the duty cycle control signal provided by the duty cycle control circuit, so that the first output terminal 51
  • the ratio of the sum of the first electrical signals output to the sum of the second electrical signals output from the second output terminal 52 is equal to the preset electrical signal ratio.
  • the sum of the duty cycle data D1 of the first switch tube and the duty cycle data D2 of the second switch tube is 1.
  • the control circuit 6 adjusts the operating frequency of the first switching tube 1 and the operating frequency of the second switching tube 2 according to the frequency control signal, so that the sum of the current value I01 output by the first output terminal 51 and the current output by the second output terminal 52
  • the duty cycle data D1 of the first switch tube and the duty cycle data D2 of the second switch tube are shown in Figures 6, 4, which show the duty cycle data D1 of the first switch tube and the duty cycle data of the second switch tube. Schematic diagram of the D2 part of the empty data.
  • the multi-channel resonant conversion circuit provided by the embodiment of the application is adopted, wherein the circuit includes a first switch tube, a second switch tube, a resonance circuit, a transformer, at least one output circuit group and a control circuit, wherein the first switch tube Connected to the second switching tube, the first switching tube and the second switching tube are both connected to the resonant circuit, the transformer includes a primary winding and at least one secondary winding pair, the primary winding is connected to the resonant circuit, and at least one secondary winding pair is connected to the resonant circuit. At least one output circuit group is connected. Each output circuit group in the at least one output circuit group has a first output terminal, a second output terminal, and a third output terminal.
  • the third output terminal is connected to the control circuit, and the control circuit is respectively connected to the first switch.
  • the control circuit is used to control the operating frequency of the first switching tube and the operating frequency of the second switching tube, so that the sum of the first electrical signal output by the first output terminal and the second output terminal output The sum of the two electrical signals is equal to the total value of the preset electrical signals.
  • the operating frequency of the first switching tube and the operating frequency of the second switching tube are controlled by the control circuit, so that the first output terminal and the second output terminal constantly output electrical signals according to a preset ratio, and the total output electrical signals are The value is equal to the total value of the preset electrical signal, which can achieve the technical effect of multiple outputs of the same driver at the same time.
  • FIG. 7 is a multiple output control provided by an embodiment of the present application.
  • a schematic flow diagram of the method. This specification provides the method operation steps as shown in the embodiments or flowcharts, but more or less operation steps may be included based on conventional or uninvented labor.
  • the order of steps listed in the embodiment is only one of the many execution orders, and does not represent the only execution order. In actual execution, it can be executed sequentially or in parallel according to the method shown in the embodiment or the drawings (for example, parallel processing). Processor or multi-threaded environment). The details are shown in Figure 7.
  • the method is based on a multi-channel resonant conversion circuit.
  • the multi-channel resonant conversion circuit includes a first switching tube 1, a second switching tube 2, a resonance circuit 3, a transformer 4, at least one output circuit group 5 and a control circuit 6, wherein the first The switching tube 1 is connected to the second switching tube 2, and the first switching tube 1 and the second switching tube 2 are both connected to the resonant circuit 3.
  • the transformer 4 includes a primary winding 41 and at least one secondary winding pair 42.
  • the primary winding 41 and The resonance circuit 3 is connected, at least one secondary winding pair 42 is connected to at least one output circuit group 5, and each output circuit group in the at least one output circuit group 5 has a first output terminal 51, a second output terminal 52, and a third output terminal 53.
  • the third output terminal 53 is connected to the control circuit 6.
  • the control circuit 6 is respectively connected to the first switch tube 1 and the second switch tube 2.
  • the control circuit 6 is used to control the operating frequency of the first switch tube 1 and the second switch tube
  • the operating frequency of 2 is such that the sum of the first electrical signal output by the first output terminal 51 and the sum of the second electrical signal output by the second output terminal 52 is equal to the preset total value of the electrical signal
  • the control circuit 6 also uses To control the size of the duty cycle data of the first switch tube 1 and the duty cycle data of the second switch tube 2, so that the sum of the first electrical signal output by the first output terminal 51 and the second output terminal 52 output
  • the ratio of the sum of the electrical signals is equal to the preset ratio of the electrical signals.
  • the method includes:
  • S701 Receive the sum of the first electrical signal output by the first output terminal 51 of each output circuit group in at least one output circuit group and the sum of the second electrical signal output by the second output terminal 52 of each output circuit group.
  • S703 Determine the total value of the electrical signal according to the sum of the first electrical signal and the sum of the second electrical signal.
  • S705 Adjust the operating frequency of the first switching tube and the operating frequency of the second switching tube according to the difference between the total value of the electrical signal and the total value of the preset electrical signal, so that the sum of the first electrical signal output by the first output terminal 51 The sum of the second electrical signals output by the second output terminal 52 is equal to the preset total value of the electrical signals.
  • the above method further includes:
  • the duty cycle data of the first switch tube and the duty cycle data of the second switch tube are adjusted according to the duty cycle control signal, so that the sum of the first electrical signal output by the first output terminal 51 and the second output terminal 52 output The ratio of the sum of the two electrical signals is equal to the preset electrical signal ratio.
  • the circuit in the present application includes a first switch tube, a second switch tube, a resonant circuit, a transformer, at least An output circuit group and a control circuit, wherein the first switching tube is connected to the second switching tube, the first switching tube and the second switching tube are both connected to the resonant circuit, and the transformer includes a primary winding and at least one secondary winding pair. The side winding is connected to the resonance circuit, and at least one secondary winding pair is connected to at least one output circuit group.
  • Each output circuit group in the at least one output circuit group has a first output terminal, a second output terminal, and a third output terminal.
  • the output terminal is connected with the control circuit
  • the control circuit is respectively connected with the first switching tube and the second switching tube
  • the control circuit is used to control the operating frequency of the first switching tube and the operating frequency of the second switching tube, so that the output of the first output terminal
  • the sum of the sum of the first electrical signal and the sum of the second electrical signal output from the second output terminal is equal to the preset total value of the electrical signal
  • the control circuit 6 is also used to control the duty cycle data of the first switch tube 1 and the
  • the size of the duty cycle data of the second switch tube 2 is such that the ratio of the sum of the first electrical signal output from the first output terminal 51 and the sum of the second electrical signal output from the second output terminal 52 is equal to the preset electrical signal ratio.
  • the operating frequency of the first switching tube and the operating frequency of the second switching tube are controlled by the control circuit, so that the first output terminal and the second output terminal constantly output electrical signals according to a preset ratio, and the output electrical signals are total
  • the value is equal to the total value of the preset electrical signal, which can achieve the technical effect of multiple outputs of the same driver at the same time.
  • connection and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a whole; it can be a mechanical connection or It is an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be a connection between two components or an interaction relationship between two components.
  • connection and other terms should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a whole; it can be a mechanical connection or It is an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be a connection between two components or an interaction relationship between two components.

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Abstract

本申请实施例所公开的一种多路谐振变换电路及基于多路谐振变换电路的多路输出控制方法，电路中的控制电路用于控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值相等，还用于控制第一开关管的占空比数据和第二开关管的占空比数据的大小，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的比值与预设电信号比值相等。通过控制电路控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端和第二输出端按照预设比值恒定输出电信号，且输出电信号总值与预设电信号总值相等，可以实现同一驱动器同时多路输出的技术效果。

Description

一种多路谐振变换电路及基于多路谐振变换电路的多路输出控制方法 技术领域
本发明涉及谐振变换器领域，尤其涉及一种多路谐振变换电路及基于多路谐振变换电路的多路输出控制方法。
背景技术
Light-Emitting Diode(LED，发光二极管)产品具有节能、环保、寿命长、转化率高等优点，而被广泛应用于照明领域。LED转换器将输入的交流电转换为直流电供给LED负载。市场上的LED转换器主要有两类，一类是输出恒流的LED驱动器，另一类是输出恒压的LED驱动器。
目前，对LED驱动器的设计要求越来越严格，需要在保证LED驱动器工作效率的前提下，减小驱动器的体积。因此，为了满足驱动器小型化的需求，在LED驱动器的电路设计中增加谐振变换器的，利用谐振软开关技术减小开关管的损耗，提高开关管的开关频率。在一些照明场合中，存在需要使用同一个驱动器同时驱动两路或者多路负载的情况，现有技术中，通过在谐振变换器的后级增加多个非隔离直流转换电路以应对使用同一个驱动器同时驱动两路或者多路负载，该种方法虽然能够实现多路输出，但是电路复杂，设计成本高昂。
发明内容
本申请实施例提供了一种多路谐振变换电路，其中，电路包括：第一开关管、第二开关管、谐振电路、变压器、至少一个输出电路组和控制电路；
第一开关管与第二开关管连接，第一开关管和第二开关管均与谐振电路连接；
变压器包括原边绕组和至少一个副边绕组对，原边绕组与谐振电路连接，至少一个副边绕组对与至少一个输出电路组连接；
至少一个输出电路组中每个输出电路组具有第一输出端、第二输出端和第三输出端；
第三输出端与控制电路连接；
控制电路分别与第一开关管和第二开关管连接，控制电路用于控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值相等，且控制电路还用于控制第一开关管的占空比数据和第二开关管的占空比数据的大小，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的比值与预设电信号比值相等。
进一步地，控制电路包括：驱动生成电路、压控振荡电路、占空比控制电路和运算放大电路；
运算放大电路与压控振荡电路连接，运算放大电路用于根据第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值的差值确定反馈电信号；
压控振荡电路与驱动生成电路连接，压控振荡电路用于根据反馈电信号生成频率控制信号；
驱动生成电路用于根据频率控制信号控制第一开关管的工作频率和第二开关管的工作频率；
占空比控制电路与驱动生成电路连接，占空比控制电路用于生成占空比控制信号；
驱动生成电路还用于根据占空比控制信号控制第一开关管的占空比数据和第二开关管的占空比数据，进而控制第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的比值，使得比值与预设电信号比值相等。
进一步地，谐振电路包括电感和电容；
第一开关管的第二端或者第二开关管的第一端依次连接电感、原边绕组、电容与第二开关管的第二端构成半桥电路。
进一步地，至少一个副边绕组对中每个副边绕组对包括第一副边绕组和第二副边绕组；
至少一个输出电路组中每个输出电路组包括第一半波整流电路和第二半波整流电路，第一半波整流电路与第一副边绕组连接，第二半波整流电路与第二副边绕组连接；
第一半波整流电路的正端为第一输出端，第二半波整流电路正端为第二输出端，第一半波整流电路的负端与第二半波整流电路的负端连接且接地，第一半波整流电路的负端与第二半波整流电路的负端连接引出第三输出端。
进一步地，至少一个输出电路组中每个输出电路组还包括一个检测电阻；
检测电阻的第一端与第一半波整流电路的负端连接，检测电阻的第一端与第二半波整流电路的负端连接，检测电阻的第二端与第三输出端连接。
进一步地，电路包括N个输出电路组，变压器包括N个副边绕组对，N个输出电路组与N个副边绕组对一一对应；N为大于或者等于2的整数，N个输出电路组包括N-1个相邻输出电路组，以及包括2(N-1)个分流电感组。
进一步地，分流电感组包括第一分流电感和第二分流电感；相邻输出电路组包括第一输出电路组和第二输出电路组；
第一分流电感位于分流电感组对应的相邻输出电路组的第一输出电路组的第一半波整流电路中，第二分流电感位于分流电感组对应的相邻输出电路组的第二输出电路组的第一半波整流电路中；或者；第一分流电感位于分流电感组对应的相邻输出电路组的第一输出电路组的第二半波整流电路中，第二分流电感位于分流电感组对应的相邻输出电路组的第二输出电路组的第二半波整流电路中。
进一步地，至少一个输出电路组中每个输出电路组的第一输出端所输出的第一电信号之和与至少一个输出电路组中每个输出电路组的第二输出端所输出的第二电信号之和的比值与预设电信号比值相等。
相应地，本申请实施例还提供了一种基于多路谐振变换电路的多路输 出控制方法，该方法包括：
接收至少一个输出电路组中每个输出电路组的第一输出端输出的第一电信号之和和每个输出电路组的第二输出端输出的第二电信号之和；
根据第一电信号之和与第二电信号之和确定电信号的总值；
根据电信号的总值与预设电信号总值的差值调整第一开关管的工作频率和第二开关管的工作频率，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值相等。
进一步地，上述方法还包括：
接收占空比控制信号；
根据占空比控制信号调整第一开关管的占空比数据和第二开关管的占空比数据，使得第一输出端输出的第一电信号之和与第二输出端输出的第二电信号之和的比值与预设电信号比值相等。
本申请实施例具有如下有益效果：
本申请实施例所公开的一种多路谐振变换电路及基于多路谐振变换电路的多路输出控制方法，其中，电路包括第一开关管、第二开关管、谐振电路、变压器、至少一个输出电路组和控制电路，其中，第一开关管与第二开关管连接，第一开关管和第二开关管均与谐振电路连接，变压器包括原边绕组和至少一个副边绕组对，原边绕组与谐振电路连接，至少一个副边绕组对与至少一个输出电路组连接，至少一个输出电路组中每个输出电路组具有第一输出端、第二输出端和第三输出端，第三输出端与控制电路连接，控制电路分别与第一开关管和第二开关管连接，控制电路用于控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值相等，且控制电路还用于控制第一开关管的占空比数据和第二开关管的占空比数据的大小，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的比值与预设电信号比值相等。基于本申请实施例，通过控制电路控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端和第二输出端按照预设比值恒定输出电信号，且输出电信号总值与预设电信号总值相等，可以实现同一驱动器同时多路输出的技术效果。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案和优点，下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它附图。
图1是本申请实施例所提供的一种多路谐振变换电路的电路示意图；
图2是本申请实施例所提供的一种多路谐振变换电路的电路示意图；
图3是本申请实施例所提供的一种多路谐振变换电路的电路示意图；
图4是本申请实施例所提供的一种第一开关管的占空比数据D1和第二开关管的占空比数据D2部分波形示意图；
图5是本申请实施例所提供的一种多路谐振变换电路的电路示意图；
图6是本申请实施例所提供的一种第一开关管的占空比数据D1和第二开关管的占空比数据D2部分波形示意图；
图7是本申请实施例提供的一种多路输出控制方法的流程示意图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施例作进一步地详细描述。显然，所描述的实施例仅仅是本申请一个实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都属于本申请保护的范围。
此处所称的“实施例”是指可包含于本申请至少一个实现方式中的特定特征、结构或特性。在本申请实施例的描述中，需要理解的是，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含的包括一个或者更多个该特征。而且，术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或 先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请实施例能够以除了在这里图示或描述以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或器件的电路和方法不必限于清楚地列出的那些步骤或器件，而是可包括没有清楚地列出的或对于这些电路和方法固有的其它步骤或器件。
请参阅图1，其所示为本申请实施例所提供的多路谐振变换电路的电路示意图，图中所示的电路包括第一开关管1、第二开关管2、谐振电路3、变压器4、至少一个输出电路组5和控制电路6，其中，第一开关管1与第二开关管2连接，第一开关管1和第二开关管2均与谐振电路3连接，变压器4包括原边绕组41和至少一个副边绕组对42，原边绕组41与谐振电路3连接，至少一个副边绕组对42与至少一个输出电路组5连接，至少一个输出电路组5中每个输出电路组具有第一输出端51、第二输出端52和第三输出端53，第三输出端53与控制电路6连接，控制电路6分别与第一开关管1和第二开关管2连接，控制电路6用于控制第一开关管1的工作频率和第二开关管2的工作频率，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的和与预设电信号总值相等，且控制电路6还用于控制第一开关管1的占空比数据和第二开关管2的占空比数据的大小，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的比值与预设电信号比值相等。
采用本申请实施例所提供的多路谐振变换电路，通过控制电路控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端和第二输出端按照预设比值恒定输出电信号，且输出电信号总值与预设电信号总值相等，可以实现同一驱动器同时多路输出的技术效果。
下面基于图1所提供的多路谐振变换电路的电路示意图，介绍一种多路谐振变换电路的具体实施方式。具体如图2，其所示为本申请实施例所提供的一种多路谐振变换电路的电路示意图。图中包括第一开关管1、第二开 关管2、谐振电路3、变压器4、至少一个输出电路组5和控制电路6，其中，第一开关管1与第二开关管2连接，第一开关管1和第二开关管2均与谐振电路3连接，变压器4包括原边绕组41和至少一个副边绕组对42，原边绕组41与谐振电路3连接，至少一个副边绕组对42与至少一个输出电路组5连接，至少一个输出电路组5中每个输出电路组具有第一输出端51、第二输出端52和第三输出端53，第三输出端53与控制电路6连接，控制电路6分别与第一开关管1和第二开关管2连接，控制电路6用于控制第一开关管1的工作频率和第二开关管2的工作频率，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的和能够恒定输出，且第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的和与预设电信号总值相等，且控制电路6还用于控制第一开关管1的占空比数据和第二开关管2的占空比数据的大小，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的比值与预设电信号比值相等。
本申请实施例中，控制电路6包括驱动生成电路61、压控振荡电路62、占空比控制电路63和运算放大电路64，其中，运算放大电路64与压控振荡电路62连接，运算放大电路64用于根据第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的和与预设电信号总值的差值确定反馈电信号，压控振荡电路62与驱动生成电路61连接，压控振荡电路62用于根据反馈电信号生成频率控制信号，驱动生成电路61用于根据频率控制信号控制第一开关管1的工作频率和第二开关管2的工作频率，占空比控制电路63与驱动生成电路61连接，占空比控制电路63用于生成占空比控制信号，驱动生成电路还用于根据占空比控制信号控制第一开关管1的占空比数据和第二开关管2的占空比数据，进而控制第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的比值，使得比值与预设电信号比值相等。
具体地，控制电路6检测第一输出端51和第二输出端52输出的总电流值，将总电流值与预设电信号总值进行比较，即将总电流值与期望值V ref比较，运算放大电路64根据总电流值与期望值的差值确定反馈电信号，反 馈电信号输入到压控振荡电路62中，压控振荡电路62根据反馈电信号生成频率控制信号，使得第一开关管1的工作频率和第二开关管2的工作频率随着反馈电信号的变化而变化，进而使得总电流与期望值相等。
其中，第一开关管1的工作频率和第二开关管2的工作频率相等，压控振荡电路62根据上述反馈电信号确定第一开关管1的工作频率的大小和第二开关管2的工作频率的大小。
本申请实施例中，谐振电路3包括电感31和电容32，电感31与电容32串联，且与变压器4的原边绕组41串联，具体地，第一开关管1的第二端11与第二开关管2的第一端21连接，且第二开关管2的第一端21、电感31、原边绕组41、电容32与第二开关管2的第二端22依次连接构成半桥电路。
本申请实施例中，上文中所描述的至少一个副边绕组对42中每个副边绕组对包括第一副边绕组和第二副边绕组，上文中所描述的至少一个输出电路组5中每个输出电路组包括第一半波整流电路和第二半波整流电路。其中，第一半波整流电路与第一副边绕组连接，第二半波整流电路与第二副边绕组连接，第一半波整流电路的正端为第一输出端51，第二半波整流电路正端为第二输出端52，第一半波整流电路的负端与第二半波整流电路的负端连接且接地为共地端，第一半波整流电路的负端与第二半波整流电路的负端连接引出公共负端，即第三输出端53。此外，上文中所描述的至少一个输出电路组5中每个输出电路组还包括一个检测电阻54，该检测电阻54的第一端与共地端连接，检测电阻54的第二端与公共负端连接，使得该检测电阻54上的电压为公共负端与共地端的压降，该压降的幅值表征第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和的大小。
本申请实施例中，上述多路谐振变换电路包括至少一个输出电路组5可具体为电路包括N个输出电路组5，变压器4包括至少一个副边绕组对42可具体为变压器4包括N个副边绕组对42，其中，N个输出电路组5与N个副边绕组对42一一对应；N为大于或者等于2的整数，N个输出电路组5包括N-1个相邻输出电路组，以及包括2(N-1)个分流电感组。该2 (N-1)个分流电感组中每个分流电感组包括第一分流电感和第二分流电感，上述相邻输出电路组包括第一输出电路组和第二输出电路组，第一分流电感位于分流电感组对应的相邻输出电路组的第一输出电路组的第一半波整流电路中，第二分流电感位于分流电感组对应的相邻输出电路组的第二输出电路组的第一半波整流电路中；或者；第一分流电感位于分流电感组对应的相邻输出电路组的第一输出电路组的第二半波整流电路中，第二分流电感位于分流电感组对应的相邻输出电路组的第二输出电路组的第二半波整流电路中。
本申请实施例中，上文中所描述的至少一个输出电路组5中每个输出电路组的第一输出端51所输出的第一电信号之和与至少一个输出电路组5中每个输出电路组的第二输出端51所输出的第二电信号之和的比值与预设电信号比值相等。
需要说明的是，本申请实施例中，电路包括至少一个输出电路组5，其中，至少一个输出电路组5可以包括一个输出电路组5，也可以包括多个输出电路组5；变压器4包括原边绕组41和至少一个副边绕组对42，其中，至少一个副边绕组对42中可以包括一个副边绕组对42，也可以包括多个副边绕组对42。其中，输出电路组5的数量与副边绕组对42的数量是一致的，输出电路5中的输出电路与副边绕组对中的副边绕组是一一对应的。下面具体介绍几种可选的实施方式。
一种可选的实施方式中，如图3，其所示为本申请实施例所提供的一种多路谐振变换电路的电路示意图。电路包括一个输出电路组5，且变压器4包括一个原边绕组41和一个副边绕组对42。输出电路组5包括第一半波整流电路和第二半波整流电路，副边绕组对42包括第一副边绕组和第二副边绕组，第一半波整流电路与第一副边绕组连接，第二半波整流电路与第二副边绕组连接，第一半波整流电路的正端为第一输出端51，第一输出端51标志为V01；第二半波整流电路的正端为第二输出端52，第二输出端52标志为V02；第一半波整流电路的负端与第二半波整流电路的负端连接，且引出第三输出端53，第三输出端53标志为V1-。
控制电路6中的运算放大电路根据第一输出端51输出的第一电信号和 第二输出端输出52的第二电信号之和和预设电信号总值的差值，即检测电阻54上的电压和期望值的差值确定反馈电信号，反馈电信号输入压控振荡电路62中，压控振荡电路62根据反馈电信号生成频率控制信号输入至驱动生成电路61，驱动生成电路61根据频率控制信号控制第一开关管1的工作频率和第二开关管2的工作频率，使得第一输出端51输出的电信号与第二输出端52输出的电信号之和与期望值相等。并且，驱动生成电路还根据占空比控制电路所提供的占空比控制信号调整第一开关管1的占空比数据和第二开关管2的占空比数据，使得第一输出端51输出的第一电信号与第二输出端52输出的第二电信号的比值与预设电信号比值相等。
具体地，预设总电流为I＝1A，预设电流比值为I01:I02＝3:1，第一开关管的占空比数据D1与第二开关管的占空比数据D2之和为1。控制电路6根据频率控制信号调整第一开关管1的工作频率大小和第二开关管2的工作频率大小，使得第一输出端51输出的电流值I01和第二输出端52输出的电流值为I02之和I01+I02＝1A,且，且调整第一开关管1的占空比数据大小和第二开关管2的占空比数据大小，使得I01:I02＝0.75A:0.25A＝3:1。其中，第一开关管的占空比数据D1和第二开关管的占空比数据D2如图4，其所示为第一开关管的占空比数据D1和第二开关管的占空比数据D2部分波形示意图。
另一种可选的实施方式中，如图5，其所示为本申请实施例所提供的一种多路谐振变换电路的电路示意图。电路包括三个输出电路组5，且变压器4包括一个原边绕组41和三个副边绕组对42。三个输出电路组5中每个输出电路组5包括第一半波整流电路和第二半波整流电路，三个副边绕组对42中每个副边绕组对包括第一副边绕组和第二副边绕组；每个输出电路组5中的第一半波整流电路与对应的副边绕组对中的第一副边绕组连接，每个输出电路组5中的第二半波整流电路与对应的副边绕组对中的第二副边绕组连接，所构成的第一输出端51分别标志为V01、V03和V05，构成的第二输出端52分别标志为V02、V04和V06。其中，V01与V02是同一个输出电路组的第一输出端51和第二输出端52的标志，该输出电路组中的第 一半波整流电路的负端与第二半波整流电路的负端连接，且引出第三输出端53，第三输出端53标志为V1-；V03与V04是同一个输出电路组的第一输出端51和第二输出端52的标志，该输出电路组中的第一半波整流电路的负端与第二半波整流电路的负端连接，且引出第三输出端53，第三输出端53标志为V2-；V05与V06是同一个输出电路组的第一输出端51和第二输出端52的标志，该输出电路组中的第一半波整流电路的负端与第二半波整流电路的负端连接，且引出第三输出端53，第三输出端53标志为V3-。
上述三个输出电路组5包括两个相邻输出电路组，以及包括四个分流电感组。该四个分流电感组L1、L2、L3和L4中每个分流电感组包括第一分流电感和第二分流电感，具体地，分流电感组L1的第一分流电感L1-1位于第一输出端V01，分流电感组L1的第二分流电感L1-2位于第一输出端V03；同理，分流电感组L2的第一分流电感L2-1位于第二输出端V02，分流电感组L2的第二分流电感L2-2位于第二输出端V04；分流电感组L3的第一分流电感L3-1位于第一输出端V03，分流电感组L3的第二分流电感L3-2位于第一输出端V05；分流电感组L4的第一分流电感L4-1位于第二输出端V04，分流电感组L4的第二分流电感L4-2位于第二输出端V06。
控制电路6中的运算放大电路根据第一输出端51输出的第一电信号之和和第二输出端输出52的第二电信号之和的和和预设电信号总值的差值，即检测电阻54上的电压和期望值的差值确定反馈电信号，反馈电信号输入压控振荡电路62中，压控振荡电路62根据反馈电信号生成频率控制信号输入至驱动生成电路61，驱动生成电路61根据频率控制信号控制第一开关管1的工作频率和第二开关管2的工作频率，使得第一输出端51输出的电信号之和与第二输出端52输出的电信号之和的和与期望值相等。并且，驱动生成电路61还根据占空比控制电路所提供的占空比控制信号调整第一开关管1的占空比数据和第二开关管2的占空比数据，使得第一输出端51输出的第一电信号之和与第二输出端52输出的第二电信号之和的比值与预设电信号比值相等。
具体地，预设总电流为I＝1A，预设电流比值为I01:I02＝1:1，第一开关管的占空比数据D1与第二开关管的占空比数据D2之和为1。控制电路6 根据频率控制信号调整第一开关管1的工作频率大小和第二开关管2的工作频率大小，使得第一输出端51输出的电流值之和I01和第二输出端52输出的电流值为I02＝1A,且，使得I01:I02＝0.5A:0.5A＝1:1。其中，第一开关管的占空比数据D1和第二开关管的占空比数据D2如图6，4，其所示为第一开关管的占空比数据D1和第二开关管的占空比数据D2部分波形示意图。
其中，第一输出端51输出的电流之和I011+I013+I015＝I01，第二输出端52输出的电流之和I022+I024+I026＝I02。其中，第一输出端51输出的电流I011、I013和I015的比值通过串联在输出电信号V01、V03和V05的输出端间的分流电感实现，例如，若I011:I013:I015＝2:1:1，则L1-1:L1-2＝1:2，L3-1:L3-2＝1:1。
采用本申请实施例所提供的一种多路谐振变换电路，其中，电路包括第一开关管、第二开关管、谐振电路、变压器、至少一个输出电路组和控制电路，其中，第一开关管与第二开关管连接，第一开关管和第二开关管均与谐振电路连接，变压器包括原边绕组和至少一个副边绕组对，原边绕组与谐振电路连接，至少一个副边绕组对与至少一个输出电路组连接，至少一个输出电路组中每个输出电路组具有第一输出端、第二输出端和第三输出端，第三输出端与控制电路连接，控制电路分别与第一开关管和第二开关管连接，控制电路用于控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值相等。基于本申请实施例，通过控制电路控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端和第二输出端按照预设比值恒定输出电信号，且输出电信号总值与预设电信号总值相等，可以实现同一驱动器同时多路输出的技术效果。
下面基于图1所提供的一种多路谐振变换电路，介绍一种基于多路谐振变换电路的多路输出控制方法的具体实施例，图7是本申请实施例提供的一种多路输出控制方法的流程示意图，本说明书提供了如实施例或流程图所示的方法操作步骤，但基于常规或者无创造性的劳动可以包括更多或 者更少的操作步骤。实施例中列举的步骤顺序仅仅为众多执行顺序中的一种方式，不代表唯一的执行顺序，在实际执行时，可以按照实施例或者附图所示的方法顺序执行或者并行执行(例如并行处理器或者多线程处理的环境)。具体的如图7所示。
该方法基于多路谐振变换电路，该多路谐振变换电路包括第一开关管1、第二开关管2、谐振电路3、变压器4、至少一个输出电路组5和控制电路6，其中，第一开关管1与第二开关管2连接，第一开关管1和第二开关管2均与谐振电路3连接，变压器4包括原边绕组41和至少一个副边绕组对42，原边绕组41与谐振电路3连接，至少一个副边绕组对42与至少一个输出电路组5连接，至少一个输出电路组5中每个输出电路组具有第一输出端51、第二输出端52和第三输出端53，第三输出端53与控制电路6连接，控制电路6分别与第一开关管1和第二开关管2连接，控制电路6用于控制第一开关管1的工作频率和第二开关管2的工作频率，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的和与预设电信号总值相等，且控制电路6还用于控制第一开关管1的占空比数据和第二开关管2的占空比数据的大小，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的比值与预设电信号比值相等。
该方法包括：
S701：接收至少一个输出电路组中每个输出电路组的第一输出端51输出的第一电信号之和和每个输出电路组的第二输出端52输出的第二电信号之和。
S703：根据第一电信号之和与第二电信号之和确定电信号的总值。
S705：根据电信号的总值与预设电信号总值的差值调整第一开关管的工作频率和第二开关管的工作频率，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的和与预设电信号总值相等。
本申请实施例中，上述方法还包括：
接收占空比控制信号；
根据占空比控制信号调整第一开关管的占空比数据和第二开关管的占 空比数据，使得第一输出端51输出的第一电信号之和与第二输出端52输出的第二电信号之和的比值与预设电信号比值相等。
本申请实施例中的方法与电路实施例基于同样的申请构思。
由上述本申请提供的多路谐振变换电路或基于多路谐振变换电路的多路输出控制方法的实施例可见，本申请中电路包括第一开关管、第二开关管、谐振电路、变压器、至少一个输出电路组和控制电路，其中，第一开关管与第二开关管连接，第一开关管和第二开关管均与谐振电路连接，变压器包括原边绕组和至少一个副边绕组对，原边绕组与谐振电路连接，至少一个副边绕组对与至少一个输出电路组连接，至少一个输出电路组中每个输出电路组具有第一输出端、第二输出端和第三输出端，第三输出端与控制电路连接，控制电路分别与第一开关管和第二开关管连接，控制电路用于控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端输出的第一电信号之和和第二输出端输出的第二电信号之和的和与预设电信号总值相等，且控制电路6还用于控制第一开关管1的占空比数据和第二开关管2的占空比数据的大小，使得第一输出端51输出的第一电信号之和和第二输出端52输出的第二电信号之和的比值与预设电信号比值相等。基于本申请实施例，通过控制电路控制第一开关管的工作频率和第二开关管的工作频率，使得第一输出端和第二输出端按照预设比值恒定输出电信号，且输出电信号总值与预设电信号总值相等，可以实现同一驱动器同时多路输出的技术效果。
在本发明中，除非另有明确的规定和限定，术语“连接”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的相连或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
需要说明的是：上述本申请实施例的先后顺序仅仅为了描述，不代表 实施例的优劣，且上述本说明书对特定的实施例进行了描述，其他实施例也在所附权利要求书的范围内。在一些情况下，在权利要求书中记载的动作或者步骤可以按照不同的实施例中的顺序来执行并且能够实现预期的结果。另外，在附图中描绘的过程不一定要求示出特定顺序或者而连接顺序才能够实现期望的结果，在某些实施方式中，多任务并行处理也是可以的或者可能是有利的。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的均为与其他实施例的不同之处。
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也视为本发明的保护范围。

Claims (10)

  1. 一种多路谐振变换电路，其特征在于，包括：第一开关管、第二开关管、谐振电路、变压器、至少一个输出电路组和控制电路；
    所述第一开关管与所述第二开关管连接，所述第一开关管和所述第二开关管均与所述谐振电路连接；
    所述变压器包括原边绕组和至少一个副边绕组对，所述原边绕组与所述谐振电路连接，所述至少一个副边绕组对与所述至少一个输出电路组连接；
    所述至少一个输出电路组中每个输出电路组具有第一输出端、第二输出端和第三输出端；
    所述第三输出端与所述控制电路连接；
    所述控制电路分别与所述第一开关管和所述第二开关管连接，所述控制电路用于控制所述第一开关管的工作频率和所述第二开关管的工作频率，使得所述第一输出端输出的第一电信号之和和所述第二输出端输出的第二电信号之和的和与预设电信号总值相等，且所述控制电路还用于控制所述第一开关管的占空比数据和所述第二开关管的占空比数据的大小，使得所述第一输出端输出的第一电信号之和和所述第二输出端输出的第二电信号之和的比值与预设电信号比值相等。
  2. 根据权利要求1所述的电路，其特征在于，所述控制电路包括：驱动生成电路、压控振荡电路、占空比控制电路和运算放大电路；
    所述运算放大电路与所述压控振荡电路连接，所述运算放大电路用于根据所述第一输出端输出的第一电信号之和和所述第二输出端输出的第二电信号之和的和与所述预设电信号总值的差值确定反馈电信号；
    所述压控振荡电路与所述驱动生成电路连接，所述压控振荡电路用于根据所述反馈电信号生成频率控制信号；
    所述驱动生成电路用于根据所述频率控制信号控制所述第一开关管的工作频率和所述第二开关管的工作频率；
    所述占空比控制电路与所述驱动生成电路连接，所述占空比控制电路 用于生成占空比控制信号；
    所述驱动生成电路还用于根据所述占空比控制信号控制所述第一开关管的占空比数据和所述第二开关管的占空比数据，进而控制所述第一输出端输出的第一电信号之和和所述第二输出端输出的第二电信号之和的比值，使得所述比值与预设电信号比值相等。
  3. 根据权利要求1所述的电路，其特征在于，所述谐振电路包括电感和电容；
    所述第一开关管的第二端或者所述第二开关管的第一端依次连接所述电感、所述原边绕组、所述电容与所述第二开关管的第二端构成半桥电路。
  4. 根据权利要求1所述的电路，其特征在于，所述至少一个副边绕组对中每个副边绕组对包括第一副边绕组和第二副边绕组；
    所述至少一个输出电路组中每个输出电路组包括第一半波整流电路和第二半波整流电路，所述第一半波整流电路与所述第一副边绕组连接，所述第二半波整流电路与所述第二副边绕组连接；
    所述第一半波整流电路的正端为第一输出端，所述第二半波整流电路正端为第二输出端，所述第一半波整流电路的负端与所述第二半波整流电路的负端连接且接地，所述第一半波整流电路的负端与所述第二半波整流电路的负端连接引出第三输出端。
  5. 根据权利要求4所述的电路，其特征在于，所述至少一个输出电路组中每个输出电路组还包括一个检测电阻；
    所述检测电阻的第一端与所述第一半波整流电路的负端连接，所述检测电阻的第一端与所述第二半波整流电路的负端连接，所述检测电阻的第二端与所述第三输出端连接。
  6. 根据权利要求1所述的电路，其特征在于，所述电路包括N个输出电路组，所述变压器包括N个副边绕组对，所述N个输出电路组与所述N 个副边绕组对一一对应；所述N为大于或者等于2的整数，所述N个输出电路组包括N-1个相邻输出电路组，以及包括2(N-1)个分流电感组。
  7. 根据权利要求6所述的电路，其特征在于，所述分流电感组包括第一分流电感和第二分流电感；所述相邻输出电路组包括第一输出电路组和第二输出电路组；
    所述第一分流电感位于所述分流电感组对应的相邻输出电路组的第一输出电路组的第一半波整流电路中，所述第二分流电感位于所述分流电感组对应的相邻输出电路组的第二输出电路组的第一半波整流电路中；或者；所述第一分流电感位于所述分流电感组对应的相邻输出电路组的第一输出电路组的第二半波整流电路中，所述第二分流电感位于所述分流电感组对应的相邻输出电路组的第二输出电路组的第二半波整流电路中。
  8. 根据权利要求2所述的电路，其特征在于，所述至少一个输出电路组中每个输出电路组的第一输出端所输出的第一电信号之和与所述至少一个输出电路组中每个输出电路组的第二输出端所输出的第二电信号之和的比值与所述预设电信号比值相等。
  9. 一种基于多路谐振变换电路的多路输出控制方法，其特征在于，包括：
    接收至少一个输出电路组中每个输出电路组的第一输出端输出的第一电信号之和和所述每个输出电路组的第二输出端输出的第二电信号之和；
    根据所述第一电信号之和与所述第二电信号之和确定电信号的总值；
    根据所述电信号的总值与预设电信号总值的差值调整第一开关管的工作频率和第二开关管的工作频率，使得所述第一输出端输出的第一电信号之和和所述第二输出端输出的第二电信号之和的和与所述预设电信号总值相等。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    接收占空比控制信号；
    根据所述占空比控制信号调整所述第一开关管的占空比数据和所述第二开关管的占空比数据，使得所述第一输出端输出的所述第一电信号之和与所述第二输出端输出的所述第二电信号之和的比值与预设电信号比值相等。
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