CN2817204Y - Synchronous control resonance type power converter - Google Patents
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Abstract
一种同步控制谐振型功率变换器，由谐振式功率变换装置、同步脉冲检测电路、谐振能量补充电路、V／F压控变换电路和开通脉冲检测电路构成，在谐振电感Lr上增加辅助绕组，取出其电压耦合信号，经整流器整流其输出端接或门电路的一输入端，压控振荡器的输出端接或门电路的另一输入端，或门电路的输出端接压控振荡器的外设定时元件构成谐振式功率变换装置的瞬态同步控制环，在谐振型功率变换器具有的低电磁干扰、高效率基础上，增加了瞬态即时控制功能，解决了谐振型功率变换器边界条件下的可靠性问题。
A synchronously controlled resonant power converter is composed of a resonant power conversion device, a synchronous pulse detection circuit, a resonant energy supplement circuit, a V/F voltage-controlled conversion circuit and a turn-on pulse detection circuit, and an auxiliary winding is added to the resonant inductance Lr, Take out its voltage coupling signal, rectify its output terminal to connect one input terminal of the OR gate circuit through a rectifier, connect the output terminal of the voltage-controlled oscillator to the other input terminal of the OR gate circuit, and connect the output terminal of the OR gate circuit to the voltage-controlled oscillator The external timing element constitutes the transient synchronous control loop of the resonant power conversion device. On the basis of the low electromagnetic interference and high efficiency of the resonant power converter, the transient real-time control function is added to solve the problem of the resonant power converter. Reliability issues under boundary conditions.
Description
技术领域technical field
本实用新型涉及一种谐振式功率变换器，特别是一种同步控制谐振型功率变换器及其技术方案。The utility model relates to a resonant power converter, in particular to a synchronously controlled resonant power converter and its technical proposal.
背景技术Background technique
现有的谐振式功率变换器是采用传统的单电压环控制技术，虽然谐振式功率变换器具有高效率、低电磁干扰、线路控制简单的优点，如图1所示，由谐振式功率变换装置1’、误差放大器2’、V/F压控振荡器3’及分相器4’构成谐振型功率变换器，由误差放大器2’的输出端与V/F压控振荡器3’的输入控制端相连，V/F压控振荡器3’的输出端与分相器4’的输入端相连，分相器4’的输出端分别接谐振式功率变换装置1’的两主开关管K1、K2控制端，误差放大器2’的两输入端分别接预设的基准电压和谐振式功率变换装置1’的输出端而构成输出电压控制环路，当输出电压V0变化时，误差放大器2’输出放大的误差电压信号调控V/F压控振荡器3’的频率来实现输出电压的稳定，但由于其误差放大器2’的误差电压输入信号为谐振式功率变换装置1’的输出端电压的积分值，故控制系统反应速度很慢，不可能做到对谐振式功率变换装置1’的瞬态即时控制；在该传统的谐振式功率变换器基础上，近年来又出现了谐振电压控制型功率变换器等改良型，理论上分析并不能解决谐振式功率变换器由空载到满负荷、满负荷到空载及母线电压变化的瞬态转换过程中，控制系统对功率变换装置1’的即时同步控制，使谐振式功率变换器主开关功率管K1、K2零电压、零电流条件丧失、出现失谐、间歇现象，引发系统可靠性低的问题。The existing resonant power converter adopts the traditional single voltage loop control technology. Although the resonant power converter has the advantages of high efficiency, low electromagnetic interference and simple line control, as shown in Figure 1, the resonant power conversion device 1', error amplifier 2', V/F voltage-controlled oscillator 3' and phase splitter 4' constitute a resonant power converter, the output of error amplifier 2' and the input of V/F voltage-controlled oscillator 3' The control terminals are connected, the output terminal of the V/F voltage-controlled oscillator 3' is connected to the input terminal of the phase splitter 4', and the output terminals of the phase splitter 4' are respectively connected to the two main switching tubes K1 of the resonant power conversion device 1' , K2 control terminal, and the two input terminals of the error amplifier 2' are respectively connected to the preset reference voltage and the output terminal of the resonant power conversion device 1' to form an output voltage control loop. When the output voltage V0 changes, the error amplifier 2 'Output the amplified error voltage signal to regulate the frequency of the V/F voltage-controlled oscillator 3' to stabilize the output voltage, but because the error voltage input signal of the error amplifier 2' is the output terminal voltage of the resonant power conversion device 1' Therefore, the response speed of the control system is very slow, and it is impossible to realize the transient real-time control of the resonant power conversion device 1'; on the basis of the traditional resonant power converter, resonant voltage control has appeared in recent years Theoretical analysis cannot solve the problem of the resonant power converter from no-load to full-load, full-load to no-load and bus voltage changes in the transient conversion process, the control system has a negative impact on the power conversion device 1' The real-time synchronous control of the resonant power converter makes the main switching power tubes K1 and K2 of the resonant power converter lose the zero-voltage and zero-current conditions, and detuning and intermittent phenomena occur, causing the problem of low system reliability.
发明内容Contents of the invention
本实用新型就是针对现有技术中的谐振型功率变换器在边界条件下工作时，瞬变因素使功率变换装置出现系统失控、可靠性低的问题，提供一种以传统的输出电压控制环来保证输出的稳定性、以增设的瞬态同步控制环来提高系统可靠性的同步控制谐振型功率变换器及其技术方案。The utility model is aimed at the problem that the power conversion device is out of control and has low reliability due to transient factors when the resonant power converter in the prior art works under boundary conditions, and provides a traditional output voltage control loop. A synchronously controlled resonant power converter and its technical solution are provided to ensure the stability of the output and improve the reliability of the system by means of an additional transient synchronous control loop.
本实用新型所采取的技术方案是：这种同步控制谐振型功率变换器，它由谐振式功率变换装置1、同步脉冲检测电路2、谐振能量补充电路3、V/F压控变换电路4和开通脉冲检测电路5构成；同步脉冲检测电路2检取并将检取反映谐振式功率变换装置谐振电感Lr上的谐振电压ULr提取出来形成同步控制脉冲Uk，同步脉冲检测电路2的输出端接V/F压控变换电路4的外设定时元件；同步脉冲检测电路2的两输入端分别接压控振荡器42的输出端和整流器21的输出端，电压耦合绕组23接整流器21的输入端；谐振能量补充电路其输出端接母线电压，开通脉冲检测电路5的输入端接V/F压控变换电路4的两输出端、开通脉冲检测电路5的输出端接谐振能量补充电路3的复位端，次级电流耦合器输出接谐振能量补充电路3的输入端，构成谐振型功率变换装置的瞬态同步控制环；V/F压控变换电路4的输出端接谐振式功率变换装置1的两组主开关管的控制端，V/F压控变换电路4的两输入端分别接预设的基准电压Vf和谐振式功率变换装置1的输出端构成传统的输出电压控制环。The technical solution adopted by the utility model is: this synchronous control resonant power converter, which consists of a resonant power conversion device 1, a synchronous pulse detection circuit 2, a resonant energy supplementary circuit 3, a V/F voltage control conversion circuit 4 and The opening pulse detection circuit 5 is formed; the synchronous pulse detection circuit 2 retrieves and extracts the resonant voltage ULr reflected on the resonant inductance Lr of the resonant power conversion device to form a synchronous control pulse Uk, and the output terminal of the synchronous pulse detection circuit 2 is connected to V The external timing element of the /F voltage-controlled conversion circuit 4; the two input ends of the synchronous pulse detection circuit 2 are respectively connected to the output end of the voltage-controlled oscillator 42 and the output end of the rectifier 21, and the voltage coupling winding 23 is connected to the input end of the rectifier 21 The output terminal of the resonant energy supplementary circuit is connected to the bus voltage, the input terminal of the opening pulse detection circuit 5 is connected to the two output terminals of the V/F voltage-controlled conversion circuit 4, and the output terminal of the opening pulse detection circuit 5 is connected to the reset of the resonant energy supplementary circuit 3 terminal, the output of the secondary current coupler is connected to the input terminal of the resonant energy supplement circuit 3, which constitutes the transient synchronous control loop of the resonant power conversion device; the output terminal of the V/F voltage-controlled conversion circuit 4 is connected to the resonant power conversion device 1 The control terminals of the two sets of main switching tubes, the two input terminals of the V/F voltage-controlled conversion circuit 4 are respectively connected to the preset reference voltage Vf and the output terminal of the resonant power conversion device 1 to form a traditional output voltage control loop.
本实用新型的同步脉冲检测电路2是由电压耦合绕组23和整流器21、或门电路22构成的；电压耦合绕组23接整流器21的输入端，整流器21的输出端接或门电路22的一输入端，或门电路22的另一输入端与压控振荡器42的输出端相连。Synchronous pulse detection circuit 2 of the present utility model is made of voltage coupling winding 23 and rectifier 21, OR gate circuit 22; terminal, and the other input terminal of the OR gate circuit 22 is connected to the output terminal of the voltage-controlled oscillator 42 .
本实用新型的电压耦合绕组23，是由谐振电感Lr上增加的辅助绕组构成。The voltage coupling winding 23 of the present invention is composed of an auxiliary winding added to the resonant inductance Lr.
本实用新型的谐振能量补充电路3是在谐振式功率变换装置谐振回路主变压器上增加谐振能量补充绕组33和其后连接的整流器34、电子开关K3及次级电流耦合器、信号处理器32构成。The resonant energy replenishing circuit 3 of the present utility model is formed by adding a resonant energy replenishing winding 33 to the main transformer of the resonant circuit of the resonant power conversion device, a rectifier 34 connected thereafter, an electronic switch K3, a secondary current coupler, and a signal processor 32 .
本实用新型的信号处理器32是由整流器、带有电子开关的积分变换器和其后连接的比较器构成；其积分变换器中的电子开关控制端即构成信号处理器32的复位端。Signal processor 32 of the present utility model is made of rectifier, integral converter with electronic switch and the comparator connected thereafter;
本实用新型的开通脉冲检测电路5是一或门电路。The opening pulse detection circuit 5 of the present utility model is an OR gate circuit.
本实用新型的V/F压控变换电路4由压控振荡器42、分相器43、误差放大器41构成的，压控振荡器42作脉冲信号源，压控振荡器42的外设定时元件即构成V/F压控变换电路4的外设定时元件。The V/F voltage-controlled conversion circuit 4 of the present utility model is composed of a voltage-controlled oscillator 42, a phase splitter 43, and an error amplifier 41. The voltage-controlled oscillator 42 is used as a pulse signal source, and the external timing of the voltage-controlled oscillator 42 The components constitute the external timing components of the V/F voltage-controlled conversion circuit 4 .
本实用新型设计思想及工作原理是：从电压耦合绕组23取出电压耦合信号ULr如图4a，经整流器21整流其输出接或门电路22的一输入端；压控振荡器42的输出波形如图4b，其输出端接或门电路22的另一输入端，或门电路22的输出端接压控振荡器42的外设定时元件；谐振能量补充绕组33经整流器34整流，其输出端通过电子开关K3接母线电压两端；开通脉冲检测电路5输入端接分相器43的两输出端，开通脉冲检测电路5输出端接信号处理器32的复位端；电流耦合器31接带有整流器的信号处理器32的输入端，信号处理器32输出端接电子开关K3的控制端；当瞬态因素使谐振环路能量发生突变时，或门电路22的输出端即时输出控制脉冲如图4c，压控振荡器42的外设定时元件回零、输出下一个半周的控制指令，完成谐振式功率变换装置1的瞬态同步控制；根据谐振式功率变换装置瞬态能量变换的大小，信号处理器32输出端通过调控电子开关K3脉冲宽度完成谐振能量的补充，确保谐振式功率变换装置1始终处于谐振状态；而压控振荡器42输入控制端接误差放大器41的输出端，误差放大器41的一输入端接基准电压Vf，另一端接输出电压V0，压控振荡器42的输出端接分相器43的输入端，分相器43输出端接谐振式功率变换装置1的两主开关管K1、K2控制端，当输出电压出现正或负偏差时，通过调控压控振荡器42的输出频率完成输出电压的柔性调节。The design idea and working principle of the present utility model are: the voltage coupling signal ULr is taken out from the voltage coupling winding 23 as shown in Fig. 4b, its output terminal is connected to another input terminal of OR gate circuit 22, and the output terminal of OR gate circuit 22 is connected to the external timing element of voltage-controlled oscillator 42; Resonant energy replenishment winding 33 is rectified by rectifier 34, and its output terminal is passed through The electronic switch K3 is connected to both ends of the bus voltage; the input terminal of the open pulse detection circuit 5 is connected to the two output terminals of the phase splitter 43, and the output terminal of the open pulse detection circuit 5 is connected to the reset terminal of the signal processor 32; the current coupler 31 is connected to a rectifier The input terminal of the signal processor 32, the output terminal of the signal processor 32 is connected to the control terminal of the electronic switch K3; when the transient factor causes the energy of the resonant loop to change suddenly, the output terminal of the OR gate circuit 22 immediately outputs the control pulse as shown in Figure 4c , the external timing element of the voltage-controlled oscillator 42 returns to zero, outputs the control command for the next half cycle, and completes the transient synchronous control of the resonant power conversion device 1; according to the magnitude of the transient energy conversion of the resonant power conversion device, the signal The output terminal of the processor 32 completes the supplement of resonance energy by adjusting the pulse width of the electronic switch K3 to ensure that the resonant power conversion device 1 is always in a resonance state; and the input control terminal of the voltage-controlled oscillator 42 is connected to the output terminal of the error amplifier 41, and the error amplifier 41 One input terminal of the voltage-controlled oscillator 42 is connected to the reference voltage Vf, the other terminal is connected to the output voltage V 0 , the output terminal of the voltage-controlled oscillator 42 is connected to the input terminal of the phase splitter 43, and the output terminal of the phase splitter 43 is connected to the two main terminals of the resonant power conversion device 1. When the control terminals of the switch tubes K1 and K2 have positive or negative deviations in the output voltage, the flexible adjustment of the output voltage is completed by regulating the output frequency of the voltage-controlled oscillator 42 .
本实用新型的技术方案在传统的单电压环控制技术的基础上，以同步脉冲检测电路2为关键、以谐振能量补充电路3为辅助的手段，有效解决了现有谐振型功率变换器由空载到满负荷、满负荷到空载及母线电压变化的瞬态转换过程中，功率变换装置1’极易进入失控状态的一系列问题，是一种既有理论意义又有实际应用价值的同步控制谐振型功率变换器技术方案；本实用新型的同步控制谐振型功率变换器在保有现存谐振式功率变换器优点的同时，在可靠性、稳定性方面具有独创性和显著的进步。The technical scheme of the utility model is based on the traditional single voltage loop control technology, with the synchronous pulse detection circuit 2 as the key and the resonant energy supplementary circuit 3 as the auxiliary means, effectively solving the existing resonant power converter. During the transient conversion process of load to full load, full load to no load and bus voltage change, the power conversion device 1' is very easy to enter a series of problems out of control, which is a synchronous system with both theoretical significance and practical application value Controlled resonance type power converter technical scheme; the synchronous control resonance type power converter of the utility model has originality and significant progress in terms of reliability and stability while maintaining the advantages of existing resonance type power converters.
附图说明Description of drawings
图1为现有的谐振型功率变换器的电原理图Figure 1 is the electrical schematic diagram of the existing resonant power converter
图2为本实用新型实施例所提供的同步控制谐振型功率变换器原理框图Fig. 2 is a functional block diagram of the synchronous control resonant power converter provided by the embodiment of the present invention
图3为本实用新型实施例所提供的同步控制谐振型功率变换器电原理图Figure 3 is an electrical schematic diagram of the synchronous control resonant power converter provided by the embodiment of the present invention
图4为本实用新型实施例所提供的同步控制谐振型功率变换器的谐振式功率变换装置谐振电感Lr上增加的电压耦合绕组23的谐振电压信号波形图(图4a)和回零脉冲检测电路2输出信号波形图(图4c)，压控振荡器42的输出波形如图(4b)Fig. 4 is the resonant voltage signal waveform diagram (Fig. 4a) and the zero return pulse detection circuit of the voltage coupling winding 23 added on the resonant inductance Lr of the resonant power conversion device of the synchronously controlled resonant power converter provided by the embodiment of the utility model 2 output signal waveform diagram (Fig. 4c), the output waveform of the voltage-controlled oscillator 42 is as shown in Fig. (4b)
具体实施方式Detailed ways
参照附图3，本实用新型实施例所提供的这种同步控制谐振型功率变换器，它由双端控制型结构的谐振式功率变换装置1、同步脉冲检测电路2、谐振能量补充电路3、V/F压控变换电路4、开通脉冲检测电路5构成，从电压耦合绕组23上取出电压耦合信号ULr，经整流器21整流接或门电路22的一输入端，压控振荡器42的输出端接或门电路22的另一输入端，或门电路22的输出端接压控振荡器42的外设定时元件，分相器43输出端分别接谐振式功率变换装置的两主开关管K1、K2控制端和开通脉冲检测电路5的两输入端，开通脉冲检测电路5输出端接信号处理器32的复位端；电流耦合器31接带有整流器的信号处理器32的输入端，信号处理器32输出端接电子开关K3的控制端，谐振能量补充绕组33经整流器34整流，其输出端通过电子开关K3接母线电压两端，构成谐振型功率变换装置的瞬态同步控制环；而压控振荡器42输入控制端接误差放大器41的输出端，压控振荡器42的输出端接分相器43的输入端，误差放大器41的一输入端接预设的基准电压Vf，另一输入端接输出电压，构成传统的输出电压控制环。Referring to accompanying drawing 3, the synchronously controlled resonant power converter provided by the embodiment of the present invention is composed of a resonant power conversion device 1 with a dual-terminal control structure, a synchronous pulse detection circuit 2, a resonant energy supplementary circuit 3, The V/F voltage-controlled transformation circuit 4 and the on-pulse detection circuit 5 are composed, and the voltage-coupling signal ULr is taken out from the voltage-coupling winding 23, rectified by the rectifier 21 and then connected to an input terminal of the OR gate circuit 22, and an output terminal of the voltage-controlled oscillator 42 Connect to the other input terminal of the OR gate circuit 22, the output terminal of the OR gate circuit 22 is connected to the external timing element of the voltage-controlled oscillator 42, and the output terminals of the phase splitter 43 are respectively connected to the two main switching tubes K1 of the resonant power conversion device , K2 control terminal and the two input terminals of the opening pulse detection circuit 5, the opening pulse detection circuit 5 output terminals are connected to the reset terminal of the signal processor 32; the current coupler 31 is connected to the input terminal of the signal processor 32 with a rectifier, and the signal processing The output terminal of the device 32 is connected to the control terminal of the electronic switch K3, the resonant energy supplement winding 33 is rectified by the rectifier 34, and its output terminal is connected to both ends of the bus voltage through the electronic switch K3, forming a transient synchronous control loop of the resonant power conversion device; The input control terminal of the oscillator 42 is connected to the output terminal of the error amplifier 41, the output terminal of the voltage controlled oscillator 42 is connected to the input terminal of the phase splitter 43, one input terminal of the error amplifier 41 is connected to the preset reference voltage Vf, and the other input The output voltage is terminated to form a traditional output voltage control loop.
Claims (7)
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| CN200420086834.0U Expired - Fee Related CN2817204Y (en) | 2004-07-30 | 2004-07-30 | Synchronous control resonance type power converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719725B (en) * | 2009-12-18 | 2012-09-26 | 刘彦君 | Device and method for controlling resonant bridge power converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719725B (en) * | 2009-12-18 | 2012-09-26 | 刘彦君 | Device and method for controlling resonant bridge power converter |
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