CN103441690A - Method for controlling combined converter for achieving tight adjusting output with high-frequency alternating-current side connected in series - Google Patents
Method for controlling combined converter for achieving tight adjusting output with high-frequency alternating-current side connected in series Download PDFInfo
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- CN103441690A CN103441690A CN2013103604475A CN201310360447A CN103441690A CN 103441690 A CN103441690 A CN 103441690A CN 2013103604475 A CN2013103604475 A CN 2013103604475A CN 201310360447 A CN201310360447 A CN 201310360447A CN 103441690 A CN103441690 A CN 103441690A
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Abstract
The invention relates to the technology of energy converters, and provides a method for controlling a combined converter for achieving tight adjusting output with a high-frequency alternating-current side connected in series. According to the method, the drive signals of a front-stage isolated type inverter are adjusted to achieve the adjustment of the output of an auxiliary transformer, and therefore the voltage difference of the input voltage and the output voltage of a Dc-Dc converter behind the auxiliary transformer is controlled within an adjusting target range. The utilization rate of the transformer is maximized, closed-loop control over an output side is achieved through the non-isolated Dc-Dc converter, and the reliability of feedback control is improved. Soft switching is easy to achieve, and high frequency and high efficiency are achieved. The voltage stress and the current stress of the auxiliary transformer are not influenced when output in a wide voltage range is. A synchronous rectification technology is adopted more easily in the rectifying circuit of an auxiliary side.
Description
Technical field
The present invention relates to a kind of isolated form Dc/Dc electric energy transducer, specifically a kind of Dc/Dc current transformer of adjusting the combined converter output voltage by auxiliary Dc-Dc current transformer.
Background technology
The electrical isolation between input, output need to be realized in the application scenario of much electricity conversion, also needs the tight adjustment of output voltage, so that when proof load disturbance or input voltage change, output voltage is still constant.In order to realize the tight adjustment of output, the general employing with high frequency transformer isolated the Dc/Dc current transformer, as shown in Figure 1, by the duty ratio of former limit switching tube or the adjusting of switching frequency, realizes the constant of output voltage.Although such scheme is simple, efficiency is lower, and especially the work duty ratio of transformer also can change along with the duty cycle adjustment of circuit, causes the utilance of transformer to reduce.
In order to improve the utilance of transformer, can adopt the structure of two-stage Dc/Dc, as shown in Figure 2.Wherein the transformer in first order DC/Dc is being operated in the state of fixed duty cycle, and the Dc-Dc current transformer that relies on rear class not isolate is realized the tight adjustment of output voltage.Prime adopts such structure, although as DCX, can be regarded the commutator transformer of an equivalence as, the optimization of implementation efficiency.But all input powers will be passed through Two Stages, Efficiency Decreasing.A kind of AC series connection has been proposed in document (CN102185493A), the direct current outlet side tight efficient convertor circuit topology of adjusting in parallel, as shown in Figure 3.For the purpose of simplifying the description, the inverter in figure is equivalent to alternating current source Vin.Because the realization of this topological output voltage adjustment capability relies on Dc-Dc current transformer in parallel, therefore when the output voltage excursion is wider, it is very large that the input side of Dc-Dc current transformer in parallel bears change in voltage, and the power excursion of its processing is also very large, therefore its voltage stress is too high, is unfavorable for the efficiency optimization of current transformer.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the deficiencies in the prior art, provide a kind of and both can obtain very high efficiency, the high-frequency ac side series connection that can realize again exporting the Dc-Dc current transformer combined converter of tight adjustment realizes the tight control method of adjusting the combined converter of output.By regulating the driving signal of prime isolated form inverter, regulate the output of auxiliary transformer, thereby make within the voltage difference of the input voltage of Dc-Dc current transformer of auxiliary transformer one side and output voltage can be controlled at optimum range.
For the technical solution problem, solution of the present invention is:
Provide a kind of high-frequency ac side series connection to realize the tight control method of adjusting the combined converter of output, be to realize the adjusting of auxiliary transformer output by the driving signal of adjusting prime isolated form inverter, thereby the voltage difference of the input voltage of the Dc-Dc current transformer after auxiliary transformer and output voltage is controlled in the adjustment aim scope; The method specifically comprises: by utilizing the cascaded structure of the former limit of high frequency transformer winding, and the direct processing inflow load by Partial Power through main transformer, another part power flows into load again through the processing of auxiliary transformer and Dc-Dc current transformer; In this process, utilize the voltage before and after the feedback circuit sampling Dc-Dc current transformer of outlet side, and realize the tight adjustment of output voltage by the output that feedback circuit is controlled the Dc-Dc current transformer; , after the output by auxiliary transformer relatively and the output of main transformer, by feedback circuit, the alternating current input power supplying on former limit is controlled simultaneously, made auxiliary transformer output follow the variation of main transformer output and change.
The high-frequency ac side series connection the present invention further provides for realizing preceding method realizes the tight combined converter of adjusting output, comprise main transformer and auxiliary transformer, after the former limit windings in series of the former limit winding of main transformer and auxiliary transformer, the other end is separately received respectively the two ends of high frequency input source; An output of main transformer secondary winding is provided with a rectifier Rec1, the output termination output ground of rectifier Rec1, and another output is connected to the anode of output capacitance Co; Another termination output ground of output capacitance Co, load RL is connected in output capacitance Co two ends; The output of described auxiliary transformer secondary winding is provided with a rectifier Rec2, the output of rectifier Rec2 is connected to the two ends of capacitor C 1, the input of Dc-Dc current transformer all is connected to the two ends of capacitor C 1 simultaneously, an output of this Dc-Dc current transformer is connected to output ground, and another output is connected to the anode of output capacitance Co;
Outlet side at auxiliary transformer secondary winding also is provided with feedback circuit, and this feedback circuit one is terminated between auxiliary transformer output and capacitor C 1 for sampling, and the other end is connected between Dc-Dc current transformer and output capacitance Co anode for sampling; Establish first control circuit and second control circuit in feedback circuit, the anode of Dc-Dc current transformer output is connected to the input of first control circuit and second control circuit simultaneously, and the anode of rectifier Rec2 output also is connected to the input of second control circuit; The output of first control circuit is connected to the control end of Dc-Dc current transformer, and the output of first control circuit is received the control end of high frequency input source Vin.
In the present invention, described feedback circuit also comprises two bleeder circuits, is respectively resistance R 1-R2 series connection group and resistance R 3-R4 series connection group;
Described rectifier Rec2 is provided in a side of the diode D12 between auxiliary transformer secondary Motor Winding Same Name of Ends and capacitor C 1 anode, the negative electrode of diode D12 is connected to the anode of capacitor C 1 and an end of resistance R 3-R4 series connection group simultaneously, another termination output ground of resistance R 3-R4 series connection group, its mid point is connected to the end of the feedback network Z of the negative input end of error amplifier and error amplifier simultaneously;
One end of the input of described first control circuit and resistance R 1-R2 series connection group all is connected to output capacitance Co anode, the output of first control circuit is connected to the control end of Dc-Dc current transformer, the mid point of resistance R 1-R2 series connection group is connected to the positive input terminal of error amplifier, another termination output ground of resistance R 1-R2 series connection group; The output of error amplifier is connected to the other end of feedback network Z and the input of second control circuit simultaneously; The output of second control circuit is connected to the control end of the switching tube Q1 that is located at transformer primary side winding side;
A connect end of former limit winding of two transformers of a termination of switching tube Q1, the ground of another termination input of switching tube Q1; The connect anode of another termination high frequency input source Vin of former limit winding of two transformers, the negative terminal of input source Vin connects the ground of input;
With rectifier, Rec2 is corresponding, and described rectifier Rec1 is provided in a side of the output of main transformer secondary winding and the diode D1 between output capacitance Co; The negative pole of diode D1 is connected to the anode of output capacitance Co.
In the present invention, the secondary winding of described main transformer and auxiliary transformer is the centre cap structure, and forms rectifier Rec1 and rectifier Rec2 with two diodes separately;
Described rectifier Rec1 has following structure: the anode of a termination road diode D1 of main transformer secondary the first winding, and the negative electrode of diode D1 is received the anode of output capacitance Co; The other end of main transformer secondary the first winding is connected to an end of output ground and secondary the second winding simultaneously, and the other end of main transformer secondary the second winding is received the anode of diode D2, and the negative electrode of diode D2 is received the negative electrode of diode D1;
Described rectifier Rec2 has following structure: one of auxiliary transformer secondary the first winding is connected to the anode of diode D3, and the other end is received the negative terminal of capacitor C 1 and an end of the second winding simultaneously; The negative electrode of diode D3 is connected to the anode of capacitor C 1 and the negative electrode of diode D4 simultaneously, and the anode of diode D4 is received the other end of auxiliary transformer copy the second winding;
Described feedback circuit also comprises two bleeder circuits, is respectively resistance R 1-R2 series connection group and resistance R 3-R4 series connection group; One of resistance R 3-R4 series connection group is connected to the anode of capacitor C 1, and the other end connects output ground, and its mid point is connected to the end of the feedback network Z of the negative input end of error amplifier and error amplifier simultaneously;
One end of the input of first control circuit and resistance R 1-R2 series connection group all is connected to output capacitance Co anode, the output of first control circuit is connected to the control end of Dc-Dc current transformer, the mid point of resistance R 1-R2 series connection group is connected to the positive input terminal of error amplifier, another termination output ground of resistance R 1-R2 series connection group; The output of error amplifier is connected to the other end of feedback network Z and the input of second control circuit simultaneously; The output of second control circuit is connected to the half-bridge driver of being located at transformer primary side winding side;
High frequency input source Vin side comprises switching tube Q1-Q2 series connection group, the anode of one termination high frequency input source Vin, and the other end connects the end of input ground and resonance capacitor C r simultaneously, a connect end of former limit winding of two transformers of another termination of resonant capacitance Cr; The connect end of another termination resonant inductance Lr1 of former limit winding of two transformers, the mid point of another termination switching tube Q1-Q2 series connection group of resonant inductance Lr1; The control end of switching tube Q1 and Q2 all is connected to half-bridge driver, and the negative terminal of high frequency input source Vin connects input ground.
In the present invention, described first control circuit and second control circuit are any one in pwm control circuit, resonance oscillation semi-bridge control circuit, constant frequency PWM control circuit or frequency conversion control circuit.
With respect to prior art, beneficial effect of the present invention:
1, the utilance of main transformer and auxiliary transformer maximizes;
2, the closed-loop control of outlet side realizes by not isolating the Dc-Dc current transformer, has improved the reliability of FEEDBACK CONTROL;
3, easily realize soft switch, realize the high frequency efficient rate;
Do not affect the voltage and current stress of auxiliary transformer when 4, wide-voltage range is exported;
5, the rectification circuit of secondary more easily adopts synchronous rectification.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1: conventional P WM current transformer;
Fig. 2: two-stage cascade type current transformer;
Fig. 3: the tight adjustment combined converter of transformer primary side AC series connection;
Fig. 4: the control strategy of the combined converter for the series connection of transformer primary side AC that the present invention proposes;
Fig. 5: the flyback combined converter that adopts control strategy in the present invention;
Fig. 6: the resonance oscillation semi-bridge type combined converter that adopts the control strategy in the present invention.
Embodiment
As shown in Figure 4, the present embodiment comprises two transformer T1 and T2, and after the former limit windings in series of the former limit winding of main transformer T1 and auxiliary transformer T2, the other end is separately received respectively the two ends of high frequency input source Vin.The input of rectification circuit Rec1 is received in the output of the secondary winding of T1.The input of rectification circuit Rec2 is received in the output of the secondary winding of T2.The output one of Rec1 terminates to the anode of Co, and the other end is received output Vo negative terminal.Load RL mono-terminates to the anode of output capacitance Co, and the other end is received the negative terminal of Vo.The output one of rectifier Rec2 terminates to the anode of capacitor C 1, and the other end is received the negative terminal of C1.The positive input terminal that just terminates to the Dc-Dc current transformer of C1, the negative terminal of C1 is received the negative input end of Dc-Dc current transformer.The anode of the output one termination output Vo of Dc-Dc current transformer, the ground of another termination output.The input of its control circuit 1 and the input of control circuit 2 are received in the output of Dc-Dc current transformer simultaneously, and the output of control circuit 1 is received the control end of Dc-Dc current transformer; Another input of control circuit 2 is received the anode of capacitor C 1, and the output of control circuit 2 is received the control end of Vin.Embodiment in Fig. 5,6, the control circuit 1 in the present invention and 2 can adopt traditional constant frequency PWM control circuit or frequency conversion control circuit.
The present embodiment utilizes the cascaded structure of the former limit of high frequency transformer winding, and Partial Power flows into load through the direct processing of T1, and another part power, after T2, then passes through the processing of Dc-Dc current transformer, flows into load.Therefore, by such structure, both realize the tight adjustment of output voltage, and made again Partial Power only pass through the processing of one-level, improved the efficiency of overall power conversion.Rely on the Dc-Dc current transformer to realize the tight adjustment of output voltage simultaneously.The outlet side that is delivered in of feedback control signal carries out, and controls the output of secondary Dc-Dc current transformer by feedback circuit, can avoid the low circuit of reliability such as light-coupled isolation.In addition, after the output that the alternating current input power supplying on former limit can be by more auxiliary transformer and the output of main transformer, by 2 pairs of inputs of control circuit, controlled, thereby the output of regulating auxiliary transformer is followed the exporting change of main transformer and is changed, even realize that output voltage can change also not the power that can bear auxiliary transformer and Dc-Dc current transformer and produce large impact in wider scope.
According to the embodiment in Fig. 5, control strategy of the present invention is further described.The Same Name of Ends that just terminates to the former limit of main transformer T11 winding of input dc power potential source Vin, the other end of the former limit of T11 winding is received the Same Name of Ends of the former limit winding of transformer T12, the other end of the former limit of T12 winding is received the end of switching tube Q1, and the other end of Q1 is received the ground of input; The control end of switching tube Q1 is connected to the output of pwm control circuit 2; The Same Name of Ends of the secondary winding of main transformer T11 is received the ground of outlet side, and the other end is received the anode of diode D1, and the negative electrode of D1 is received the anode of output capacitance Co; Load RL is in parallel with output capacitance Co; The Same Name of Ends of the secondary winding of auxiliary transformer T12 is received the negative terminal of output capacitance C1, and the other end is received the anode of diode D12, and the negative electrode of D12 is received the anode of C1; The positive and negative two ends of capacitor C 1 are as the positive and negative input of Dc-Dc current transformer.The output of Dc-Dc current transformer 1 is in parallel with output capacitance Co.
The bleeder circuit be composed in series by resistance R 3 and R4, one of the R3 anode that terminates to capacitor C 1 wherein, the other end is received the negative input end of resistance R 4 and error amplifier 1, receives the end of the feedback network Z of error amplifier 1 simultaneously; The other end of resistance R 4 is received output ground.
Resistor network R1 and R2 series connection are as the dividing potential drop sampling of output voltage; One of resistance R 1 anode that terminates to output capacitance wherein, the other end is received a section of resistance R 4, receives the positive input of error amplifier 1 simultaneously; The other end of resistance R 2 is received output ground.The output of error amplifier 1 is received another section of feedback network Z, receives the input of pwm control circuit simultaneously; The output of pwm control circuit 2 is received the control end of Q1.
According in the embodiment shown in Fig. 6, one of the switching tube Q1 in the half-bridge of former limit terminates to the anode of input Vin, and the other end of Q1 is received the end of Q2, receives the end of resonant capacitance Cr simultaneously.It is low that another termination of Q2 is inputted.The control termination drive circuit of Q1 and Q2.The other end of Cr1 is received the end of resonant inductance Lr1, and the other end of Lr1 is received an end of the former limit of T11 winding, and the other end of the former limit of T11 winding is received an end of the former limit of T12 winding.The other end of the former limit of T12 winding is received the ground of input.Tap structure centered by the secondary winding of main transformer T11, the anode of a termination road diode D1 of T11 secondary the first winding, the negative electrode of D1 is received the anode of output capacitance Co.Another section of the first winding received the end that secondary the second winding is received on output ground simultaneously; Another section of secondary the second winding received the anode of diode D2.The negative electrode of D2 is received the negative electrode of D1.
The secondary of auxiliary transformer T12 is similarly the centre cap structure, the anode of one termination road D3 of secondary the first winding of T12, the other end of T12 the first winding is received the negative terminal of capacitor C 1, receive an end of the second winding simultaneously, the negative electrode of D3 is received the anode of capacitor C 1, receives the negative electrode of diode D4 simultaneously.The other end of the second winding of T12 is received the anode of diode D4.Capacitor C 1 is received input anode and the negative terminal of Dc-Dc current transformer 1, and the output plus terminal of Dc-Dc current transformer is received the anode of Co.
The bleeder circuit be composed in series by resistance R 3 and R4, one of the R3 anode that terminates to capacitor C 1 wherein, the other end is received the negative input end of resistance R 4 and error amplifier 1, receives the end of the feedback network Z of error amplifier 1 simultaneously; The other end of resistance R 4 is received output ground.
Resistor network R1 and R2 series connection are as the dividing potential drop sampling of output voltage; One of resistance R 1 anode that terminates to output capacitance wherein, the other end is received a section of resistance R 4, receives the positive input of error amplifier 1 simultaneously; The other end of resistance R 2 is received output ground.The output of error amplifier 1 is received another section of feedback network Z, receives the input of resonance oscillation semi-bridge control circuit 2 simultaneously.The output of resonance oscillation semi-bridge control circuit 2 is received the input of half-bridge drive circuit, and the first output of half-bridge drive circuit is received the control end of Q1, and the second output is received the control end of Q2.
It should be noted that the specific term used should not redefine some certain features of the present invention, feature or the scheme that this term is relevant to this term with restriction here for being illustrated in when explanation some feature of the present invention or scheme.In a word, should by the terminological interpretation of using in the claims of enclosing, not be disclosed specific embodiment in limiting the invention to specification, unless above-mentioned detailed description part defines these terms clearly.Therefore, actual range of the present invention not only comprises the disclosed embodiments, also is included under claims and implements or carry out all equivalents of the present invention.
Claims (5)
1. the series connection of high-frequency ac side realizes the tight control method of adjusting the combined converter of output, it is characterized in that, be to realize the adjusting of auxiliary transformer output by the driving signal of adjusting prime isolated form inverter, thereby the voltage difference of the input voltage of the Dc-Dc current transformer after auxiliary transformer and output voltage is controlled in the adjustment aim scope; The method specifically comprises: by utilizing the cascaded structure of the former limit of high frequency transformer winding, and the direct processing inflow load by Partial Power through main transformer, another part power flows into load again through the processing of auxiliary transformer and Dc-Dc current transformer; In this process, utilize the voltage before and after the feedback circuit sampling Dc-Dc current transformer of outlet side, and realize the tight adjustment of output voltage by the output that feedback circuit is controlled the Dc-DC current transformer; , after the output by auxiliary transformer relatively and the output of main transformer, by feedback circuit, the alternating current input power supplying on former limit is controlled simultaneously, made auxiliary transformer output follow the variation of main transformer output and change.
2. realize the tight combined converter of adjusting output for the high-frequency ac side series connection that realizes the described method of claim 1, comprise main transformer and auxiliary transformer, after the former limit windings in series of the former limit winding of main transformer and auxiliary transformer, the other end is separately received respectively the two ends of high frequency input source; It is characterized in that, an output of main transformer secondary winding is provided with a rectifier Rec1, the output termination output ground of rectifier Rec1, and another output is connected to the anode of output capacitance Co; Another termination output ground of output capacitance Co, load RL is connected in output capacitance Co two ends; The output of described auxiliary transformer secondary winding is provided with a rectifier Rec2, the output of rectifier Rec2 is connected to the two ends of capacitor C 1, the input of Dc-Dc current transformer all is connected to the two ends of capacitor C 1 simultaneously, an output of this Dc-Dc current transformer is connected to output ground, and another output is connected to the anode of output capacitance Co;
Outlet side at auxiliary transformer secondary winding also is provided with feedback circuit, and this feedback circuit one is terminated between auxiliary transformer output and capacitor C 1 for sampling, and the other end is connected between Dc-Dc current transformer and output capacitance Co anode for sampling; Establish first control circuit and second control circuit in feedback circuit, the anode of Dc-Dc current transformer output is connected to the input of first control circuit and second control circuit simultaneously, and the anode of rectifier Rec2 output also is connected to the input of second control circuit; The output of first control circuit is connected to the control end of Dc-Dc current transformer, and the output of first control circuit is received the control end of high frequency input source Vin.
3. combined converter according to claim 2, is characterized in that, described feedback circuit also comprises two bleeder circuits, is respectively resistance R 1-R2 series connection group and resistance R 3-R4 series connection group;
Described rectifier Rec2 is provided in a side of the diode D12 between auxiliary transformer secondary Motor Winding Same Name of Ends and capacitor C 1 anode, the negative electrode of diode D12 is connected to the anode of capacitor C 1 and an end of resistance R 3-R4 series connection group simultaneously, another termination output ground of resistance R 3-R4 series connection group, its mid point is connected to the end of the feedback network Z of the negative input end of error amplifier and error amplifier simultaneously;
One end of the input of described first control circuit and resistance R 1-R2 series connection group all is connected to output capacitance Co anode, the output of first control circuit is connected to the control end of Dc-Dc current transformer, the mid point of resistance R 1-R2 series connection group is connected to the positive input terminal of error amplifier, another termination output ground of resistance R 1-R2 series connection group; The output of error amplifier is connected to the other end of feedback network Z and the input of second control circuit simultaneously; The output of second control circuit is connected to the control end of the switching tube Q1 that is located at transformer primary side winding side;
A connect end of former limit winding of two transformers of a termination of switching tube Q1, the ground of another termination input of switching tube Q1; The connect anode of another termination high frequency input source Vin of former limit winding of two transformers, the negative terminal of input source Vin connects the ground of input;
With rectifier, Rec2 is corresponding, and described rectifier Rec1 is provided in a side of the output of main transformer secondary winding and the diode D1 between output capacitance Co; The negative pole of diode D1 is connected to the anode of output capacitance Co.
4. combined converter according to claim 2, is characterized in that, the secondary winding of described main transformer and auxiliary transformer is the centre cap structure, and form rectifier Rec1 and rectifier Rec2 with two diodes separately;
Described rectifier Rec1 has following structure: the anode of a termination road diode D1 of main transformer secondary the first winding, and the negative electrode of diode D1 is received the anode of output capacitance Co; The other end of main transformer secondary the first winding is connected to an end of output ground and secondary the second winding simultaneously, and the other end of main transformer secondary the second winding is received the anode of diode D2, and the negative electrode of diode D2 is received the negative electrode of diode D1;
Described rectifier Rec2 has following structure: one of auxiliary transformer secondary the first winding is connected to the anode of diode D3, and the other end is received the negative terminal of capacitor C 1 and an end of the second winding simultaneously; The negative electrode of diode D3 is connected to the anode of capacitor C 1 and the negative electrode of diode D4 simultaneously, and the anode of diode D4 is received the other end of auxiliary transformer copy the second winding;
Described feedback circuit also comprises two bleeder circuits, is respectively resistance R 1-R2 series connection group and resistance R 3-R4 series connection group; One of resistance R 3-R4 series connection group is connected to the anode of capacitor C 1, and the other end connects output ground, and its mid point is connected to the end of the feedback network Z of the negative input end of error amplifier and error amplifier simultaneously;
One end of the input of first control circuit and resistance R 1-R2 series connection group all is connected to output capacitance Co anode, the output of first control circuit is connected to the control end of Dc-Dc current transformer, the mid point of resistance R 1-R2 series connection group is connected to the positive input terminal of error amplifier, another termination output ground of resistance R 1-R2 series connection group; The output of error amplifier is connected to the other end of feedback network Z and the input of second control circuit simultaneously; The output of second control circuit is connected to the half-bridge driver of being located at transformer primary side winding side;
High frequency input source Vin side comprises switching tube Q1-Q2 series connection group, the anode of one termination high frequency input source Vin, and the other end connects the end of input ground and resonance capacitor C r simultaneously, a connect end of former limit winding of two transformers of another termination of resonant capacitance Cr; The connect end of another termination resonant inductance Lr1 of former limit winding of two transformers, the mid point of another termination switching tube Q1-Q2 series connection group of resonant inductance Lr1; The control end of switching tube Q1 and Q2 all is connected to half-bridge driver, and the negative terminal of high frequency input source Vin connects input ground.
5. according to the combined converter described in claim 2-4 any one, it is characterized in that, described first control circuit and second control circuit are any one in pwm control circuit, resonance oscillation semi-bridge control circuit, constant frequency PWM control circuit or frequency conversion control circuit.
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| CN106685213A (en) * | 2017-01-13 | 2017-05-17 | 成都中科慧源科技有限公司 | Anti-high voltage interference circuit |
| CN107171563A (en) * | 2017-06-07 | 2017-09-15 | 浙江大学 | The combined converter of tight adjustment output |
| CN113839565A (en) * | 2021-11-26 | 2021-12-24 | 深圳市永联科技股份有限公司 | Wide output voltage control method, wide output voltage control circuit and charging pile |
| WO2023237057A1 (en) * | 2022-06-08 | 2023-12-14 | 中兴通讯股份有限公司 | Partial power regulation-type converter |
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| CN102185493A (en) * | 2011-05-17 | 2011-09-14 | 浙江大学 | Combined current transformer capable of realizing emergency regulation of output by series connection of high frequency AC sides |
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| CN106685213A (en) * | 2017-01-13 | 2017-05-17 | 成都中科慧源科技有限公司 | Anti-high voltage interference circuit |
| CN107171563A (en) * | 2017-06-07 | 2017-09-15 | 浙江大学 | The combined converter of tight adjustment output |
| CN113839565A (en) * | 2021-11-26 | 2021-12-24 | 深圳市永联科技股份有限公司 | Wide output voltage control method, wide output voltage control circuit and charging pile |
| WO2023237057A1 (en) * | 2022-06-08 | 2023-12-14 | 中兴通讯股份有限公司 | Partial power regulation-type converter |
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