CN104600992B - DC - DC converter circuit - Google Patents

DC - DC converter circuit Download PDF

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CN104600992B
CN104600992B CN 201410775455 CN201410775455A CN104600992B CN 104600992 B CN104600992 B CN 104600992B CN 201410775455 CN201410775455 CN 201410775455 CN 201410775455 A CN201410775455 A CN 201410775455A CN 104600992 B CN104600992 B CN 104600992B
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rectifier
unit
dc
current
controllable switch
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CN 201410775455
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Chinese (zh)
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CN104600992A (en )
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王再兴
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西安华为技术有限公司
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Abstract

本发明提供一种直流‑直流转换电路,包括:依次连接的桥式电路、变压电路和次级整流电路;次级整流电路中,第一整流单元的正极与第二整流单元的负极和变压电路的次边绕组的一端连接,第三整流单元的正极与第四整流单元的负极、次边绕组的另一端和可控开关的一端连接;第一电容的一端和第二电容的一端均与可控开关的另一端连接,第一电容的另一端连接第一整流单元和第三整流单元的负极,第二电容的另一端连接第二整流单元和第四整流单元的正极。 The present invention provides a DC - DC converter circuit comprising: a bridge circuit connected in sequence, a transformer circuit and a secondary rectifier circuit; a secondary rectifier circuit, the positive electrode and the negative electrode of the second rectifying unit of the rectifying unit and a first variable One end of the secondary windings of the voltage dividing circuit is connected to the positive electrode and the negative electrode of the fourth to the third rectifier unit rectifying unit, and another end of the controllable switch connected secondary windings; ends of the first capacitor and a second capacitor each and the other end connected to the controllable switch, the other terminal of the first capacitor is connected to the anode of the first rectifier unit and the third rectifying element, the other end of the second capacitor is connected to the cathode of the second rectifying element and the fourth rectifying element. 通过本发明提供的方案,基于不同场景,通过控制可控开关的截止和导通,切换次级整流形式,实现对输出电压的辅助调节,即使在宽范围变化的输入、输出电压的场景下,保证转换效率。 By the present invention provides, based on different scenarios, by controlling the controllable switch is turned on and off, switching the secondary rectified form to achieve regulation of the output voltage of the secondary, the scene change even in a wide range of input and output voltage, ensure conversion efficiency.

Description

直流-直流转换电路 DC - DC converter circuit

技术领域 FIELD

[0001] 本发明涉及电路领域,尤其涉及一种直流-直流转换电路。 [0001] The present invention relates to the field of circuits, and particularly to a DC - DC converter circuit.

背景技术 Background technique

[0002] 开关电源中通常使用桥式拓扑来完成直流(简称DC)-直流转换。 [0002] The switching power supply is generally used to complete the current bridge topology (referred to as DC) - DC converter. 具体的,PWM型桥式拓扑可以通过调节功率开关的驱动信号的占空比,调节拓扑的直流增益,谐振桥式拓扑可以通过调节功率开关的驱动信号的频率,调节拓扑的直流增益,从而实现不同电压输入时稳定输出电压,或实现输出电压在一定范围内的调节。 Specifically, the PWM-bridge topology by adjusting the duty cycle of the drive signal of the power switch, the DC gain regulator topology, the resonant frequency of the bridge topology by adjusting the drive signal of the power switch, adjust the DC gain topology, in order to achieve stabilize the output voltage at different input voltages, output voltage regulation, or implemented within a certain range. 可见,目前常见的使用桥式拓扑的开关电源中,都是通过调节功率开关的驱动信号来调节直流增益。 Visible, using the current common bridge topology switching power supply, the DC gain is adjusted by adjusting the drive signal of the power switch.

[0003] 但是,基于上述直流-直流转换方案,当输入电压和/或者输出电压需要在较大的范围内调节时,功率开关的驱动信号调节范围相应也会很大。 [0003] However, based on the DC - DC conversion scheme, when the input voltage and / or the output voltage needs to be adjusted within a wide range, the power switch driving signal corresponding to the adjustment range will be great. 而无论PWM型桥式拓扑还是谐振桥式拓扑,都存在一个相对高效率的工作状态,尤其当输入、输出电压变化时,还可能会严重偏离理想的工作状态,导致转换效率的下降。 Regardless of the PWM-bridge resonant topology or bridge topology, there is a relatively high-efficiency operation state, especially when the input and output voltage variation, may represent a serious deviation from the ideal operating state, resulting in decreased conversion efficiency. 因此现有的直流-直流转换方案无法适用于宽范围变化的输入、输出电压的场景。 Thus the conventional DC - DC conversion scheme can not be applied to a wide range of input change, the output voltage of the scene.

发明内容 SUMMARY

[0004] 本发明提供一种直流-直流转换电路,用于解决现有的直流-直流转换方案无法适用于宽范围变化的输入、输出电压的场景的问题。 [0004] The present invention provides a DC - DC converter, for solving the conventional DC - DC conversion scheme can not be applied to a wide range of problems changing scene input and output voltage.

[0005] 本发明的第一方面是提供一种直流-直流转换电路,包括:依次连接的桥式电路、 变压电路和次级整流电路;所述次级整流电路包括:第一整流单元、第二整流单元、第三整流单元、第四整流单元、可控开关、第一电容、以及第二电容;其中,所述第一整流单元的正极与所述第二整流单元的负极和变压电路的次边绕组的一端连接,所述第三整流单元的正极与所述第四整流单元的负极、所述次边绕组的另一端和所述可控开关的一端连接;所述第一电容的一端和所述第二电容的一端均与所述可控开关的另一端连接,所述第一电容的另一端连接至所述第一整流单元和所述第三整流单元的负极,所述第二电容的另一端连接至所述第二整流单元和所述第四整流单元的正极。 [0005] The first aspect of the present invention is to provide a DC - DC converter circuit comprising: a bridge circuit connected in sequence, a transformer circuit and a secondary rectifier circuit; said secondary rectifier circuit comprises: a first rectifying unit, a second rectifying unit, a third rectifying unit, a fourth rectifying unit, a controllable switch, a first capacitor and a second capacitor; wherein the positive electrode of the first rectifying unit and the second transformer and the anode of the rectifying unit One end of the secondary winding circuit, the positive end of the anode of the third rectifier unit and the fourth rectifying element, the other end of the secondary winding and the controllable switch is connected; a first capacitor and an end of each end of the second capacitor and the other end is connected to the controllable switch, the other terminal of the first capacitor is connected to the cathode of the first rectifier unit and the third rectifying unit, the the other end of the second capacitor is connected to the cathode of the second rectifying element and the fourth rectifying unit.

[0006] 根据第一方面,在第一方面的第一种实施方式中,所述直流-直流转换电路还包括:与所述可控开关连接的控制器,所述控制器包括:采集单元,用于获取所述直流-直流转换电路当前的输入电压和输出电压;处理单元,与所述采集单元连接,用于根据所述输入电压和所述输出电压,确定当前需要采用的整流方式;控制单元,与所述处理单元连接,用于若当前需要采用的整流方式为倍压整流,则控制所述可控开关导通,若当前需要采用的整流方式为桥式整流,控制所述可控开关截止。 [0006] According to a first aspect, a first embodiment of the first aspect, the DC - DC converter circuit further comprising: a controller coupled to said controllable switch, said controller comprising: a collection unit, configured to obtain the DC - DC converter circuit of the current input and output voltages; a processing unit connected to the acquisition unit, according to the input voltage and the output voltage determines the current rectifier to be utilized; control means connected to the processing unit for the controllable rectifier If the current need for the voltage doubler rectifier, control the controllable switch is turned on, if the current rectifier bridge rectifier need for control switch is turned off.

[0007] 根据第一方面的第一种实施方式,在第一方面的第二种实施方式中,所述处理单元包括:第一计算子单元,用于计算所述输入电压与所述输出电压的比值;第一处理子单元,用于若所述比值小于第一门限值,则确定当前需要采用的整流方式为倍压整流,否则, 确定当前需要采用的整流方式为桥式整流;或者,所述第一计算子单元,用于计算所述输出电m与所讼八电往的比值;所还弟一处理子单元,用于若所述比值大于所述第一门限值的倒数,则确定当前需要采用的整流方式为倍压整流,否则,确定当前需要采用的整流方式为桥式整流。 [0007] According to a first embodiment of the first aspect, the second embodiment of the first aspect, the processing unit comprises: a first calculating subunit, configured to calculate the input voltage and the output voltage ratio; a first processing sub-unit, configured to, if the ratio is less than the first threshold value, it is determined that the current need for the rectifier voltage doubler rectifier, otherwise, determining that the current rectifier need for bridge rectifier; or the first computing sub-unit, for calculating the electric power eight m and the defendant to a ratio of the output; brother is also a processing subunit, configured to, if the ratio is greater than the first threshold value of the reciprocal of it is determined that the current need for the rectifier voltage doubler rectifier, otherwise, to determine the rectifier current need for bridge rectifier.

[0008]根据第一方面的第一种实施方式,在第一方面的第三种实施方式中,所述采集单元,与所述控制单元连接,还用于获取所述直流—直流转换电路当前的输出电流,以使所述控制单元根据所述输出电流控制所述可控开关。 [0008] According to a first embodiment of the first aspect, a third embodiment of the first aspect, the acquisition unit connected to the control unit is further configured to obtain the DC - DC converter circuit current output current, so that the control unit controls the output current in accordance with the controllable switch.

[0009]根^第一方面的第三种实施方式,在第一方面的第四种实施方式中,所述控制单元,还用于若根据所述输入电压和所述输出电压,确定当前需要采用的整流方式为倍压整流,且所述输出电流大于第三门限值,则控制所述可控开关导通,否则,控制所述可控开关截止。 [0009] ^ root of the first aspect of the third embodiment, a fourth embodiment of the first aspect, the control unit is further configured to, if the output voltage from the input voltage, the current required is determined rectifier voltage doubler rectifier is used, and the output current is greater than the third threshold value, controlling the controllable switch is turned on, otherwise, controlling the controllable switch is turned off.

[0010]根据第一方面的第二种实施方式,在第一方面的第五种实施方式中,所述第一门限值为预设的值。 [0010] According to a second embodiment of the first aspect, the fifth embodiment of the first aspect, the first threshold value is a preset value.

[0011]根据第一方面的第二种实施方式至第四种实施方式中的任一实施方式,在第一方面的第六种实施方式中,所述控制器还包括:第一调整单元,与所述采集单元和所述控制单元连接,用于根据所述输出电流,调整所述第一门限值,以使所述控制单元根据当前的所述第一门限值控制所述可控开关。 [0011] According to a second embodiment of the first aspect of the fourth embodiment according to any one embodiment, in a sixth embodiment of the first aspect, the controller further comprises: a first adjustment unit, the collecting unit and the control unit is connected, according to said output current, adjusting the first threshold value, said control unit to cause the controllable current according to the first control threshold value switch.

[0012]根据第一方面的第二f实施方式至第四种实施方式中的任一实施方式,在第一方面的第七种实施方式中,所述采集单元,还用于采集当前的温度;所述控制器还包括:第二调整单元,与所述采集单元和所述控制单元连接,用于根据所述温度,调整所述第一门限值,以使所述控制单元根据当前的所述第一门限值控制所述可控开关。 [0012] f according to any of the second embodiment to fourth embodiment of the first aspect of an embodiment, a seventh embodiment of the first aspect, the acquisition unit for acquiring further current temperature ; wherein the controller further comprises: a second adjusting means, connected to said acquisition means and said control means, according to said temperature, adjusting the first threshold value, so that the control unit according to the current the first threshold value to control the controllable switch.

[0013]根据第一方面的任一实施方式,在第一方面的第八种实施方式中,所述第一整流单元、所述第二整流单元、所述第三整流单元和所述第四整流单元包括:一个整流器件,或者以并联和/或串联方式连接的多个整流器件。 [0013] According to one aspect of any of the first embodiment, in the eighth embodiment of the first aspect, the first rectifying unit, the second rectifying unit, the third unit and the fourth rectifying rectifying unit comprises: a rectifier element, a plurality of rectifying devices or in parallel and / or series connection.

[0014]根据第一方面的第八种实施方式,在第一方面的第九种实施方式中,所述整流器件为整流二极管或者MOSFET。 [0014] According to an eighth embodiment of the first aspect, in the ninth embodiment of the first aspect, the rectifier element is a diode or a rectifier MOSFET.

[0015]根据第一方面的任一实施方式,在第一方面的第十种实施方式中,所述可控开关包括MOSFET、IGBT、B JT或者继电器。 [0015] According to one aspect of any of the first embodiment, the tenth embodiment of the first aspect, said controllable switch comprises a MOSFET, IGBT, B JT or relay.

[0016]本发明提供的直流-直流转换电路,在不同的场景下,通过控制可控开关的截止和导通,使直流-直流转换电路的次级整流电路的形式可以在桥式整流和倍压整流中进行相应的切换。 [0016] The present invention provides a DC - DC converter circuit, in different scenarios, and turned off by controlling the controllable switch, the DC - DC rectifier circuit forms a secondary conversion circuit may bridge rectifier and times pressure rectification switching accordingly. 由于同等条件下,倍压整流的输出电压通常高于桥式整流的输出电压,因此,能够适用在输入电压较低、输出电压较高的场景,相反的,桥式整流则可以适用在输入电压较高、输出电压较低的场景,从而通过对次级整流形式的切换实现对输出电压的辅助调节,目口使在宽范围变化的输入、输出电压的场景下,仍可有效保证转换效率。 Since under the same conditions, the voltage doubler rectified output voltage is generally higher than the output voltage of the bridge rectifier, and therefore can be applied at low input voltages, output voltages higher scene, opposite, bridge rectifier input voltage may be applied higher, lower output voltage scene, in order to achieve regulation of the output voltage of the auxiliary switch of the secondary rectified by the form, so that entry port under widely varying scene input and output voltage, the conversion efficiency can still be effectively guaranteed.

附图说明 BRIEF DESCRIPTION

[0017]为了更清楚地说明本发明实施例或现有技术中的技术方案,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地介绍,显而易见地,下面描述中的附图是本发明的一些实施例,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他的附图。 [0017] In order to more clearly illustrate the technical solutions in the embodiments or the prior art embodiment of the present invention, briefly introduced hereinafter, embodiments are described below in the accompanying drawings or described in the prior art needed to be used in describing the embodiments figures some embodiments of the present invention, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0018] 图1为本发明实施例一提供的直流-直流转换电路的结构示意图; [0018] Figure 1 provides an embodiment of a DC embodiment of the invention - DC converter circuit structure diagram;

[0019] 图2为本发明实施例一提供的直流-直流转换电路的等效电路示意图; [0019] FIG. 2 provides an embodiment of a DC embodiment of the present invention - a schematic view of an equivalent circuit of the DC converter;

[0020] 图3为本发明实施例一提供的直流-直流转换电路的等效电路示意图; [0020] FIG. 3 provides a DC embodiment of the embodiment of the present invention - a schematic view of an equivalent circuit of the DC converter;

[0021]图4为本发明实施例二提供的直流-直流转换电路的结构示意图; [0021] FIG 4 according to a second embodiment of a DC present invention - DC converter circuit structure diagram;

[0022]图5为本发明实施例二中所述控制器的结构示意图。 [0022] Fig 5 a schematic view of the structure of the controller in the second embodiment of the present invention.

具体实施方式 detailed description

[0023]为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。 [0023] In order that the invention object, technical solutions, and advantages of the embodiments more clearly, the following the present invention in the accompanying drawings, technical solutions of embodiments of the present invention are clearly and completely described, obviously, the described the embodiment is an embodiment of the present invention is a part, but not all embodiments. 基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。 Based on the embodiments of the present invention, those of ordinary skill in the art to make all other embodiments without creative work obtained by, it falls within the scope of the present invention.

[0024]图1为本发明实施例一提供的直流-直流转换电路的结构示意图,如图1所示,所述电路包括:依次连接的桥式电路10、变压电路20和次级整流电路30;次级整流电路30包括: [0025] 第一整流单元31、第二整流单元32、第三整流单元33、第四整流单元34、可控开关35、第一电容36、以及第二电容37;其中, [0024] Figure 1 provides an embodiment of a DC embodiment of the invention - DC converter circuit structure diagram shown in Figure 1, said circuit comprising: 10, 20 and the secondary circuit of the transformer rectifier circuit connected to the bridge circuit sequentially 30; a secondary rectifying circuit 30 comprises: [0025] a first rectifying unit 31, second rectifying unit 32, third rectifying unit 33, a fourth rectifying unit 34, a controllable switch 35, a first capacitor 36, and a second capacitor 37; wherein,

[0026] 第一整流单元31的正极与第二整流单元32的负极和变压电路20的次边绕组21的一端连接,第三整流单元33的正极与第四整流单元34的负极、次边绕组21的另一端和可控开关35的一端连接; End of the cathode of the second rectifying unit [0026] The first rectifying unit 31 and the transformer secondary windings of the negative electrode 21 of circuit 32 is connected to the negative electrode of the positive electrode and the third rectifying unit 33 fourth rectifier unit 34, secondary side the other end of the winding and the controllable switch 21 is connected to one end 35;

[0027]第一电容36的一端和第二电容37的一端均与可控开关35的另一端连接,第一电容36的另一端连接至第一整流单元31和第三整流单元33的负极,第二电容37的另一端连接至第二整流单元32和第四整流单元34的正极。 [0027] One end 36 of the first end of the second capacitor and the capacitor 37 are connected to the other terminal of the controllable switch 35, the other end of the first capacitor 36 is connected to the cathode of the first rectifier unit 31 and the third rectifying unit 33, the other end of the second capacitor 37 is connected to the cathode of the second rectifying unit 32 and the fourth rectifier unit 34.

[0028]具体的,在直流-直流转换电路中,桥式电路10将输入的直流电变换为交流电,经过变压电路20调整后的交流电输入给次级整流电路3〇,通过次级整流电路30将交流电变换为直流电输出。 [0028] Specifically, in the DC - DC conversion circuit, the bridge circuit 10 converts DC input into AC power through the AC input to the secondary transformer circuit 20 adjusts 3〇 rectifying circuit, the rectifying circuit 30 through a secondary converting alternating current into direct current output.

[0029] 本实施例中,桥式电路10具体可以采用能够将输入的直流电变换为交流电的任意桥式拓扑,例如,LLC电路、电流型全桥电路等,本实施例在此不对其电路形式进行限制。 [0029] In this embodiment, particularly the bridge circuit 10 may be employed to transform DC input can be any alternating current bridge topology, e.g., LLC circuit, a current type full bridge circuit, the circuit does not form thereof In this embodiment of the present embodiment limit. [0030] 其中,可控开关35具体可以为,能够实现在任意方向上的电流导通和截止这两种工作状态之间进行切换的任意可控的开关装置,举例来说,可控开关35可以包括半导体器件,例如,金属-氧化层半导体场效晶体管(Metal-Oxide-Semiconductor Field-Effect Transistor,简称M0SFET)、绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor, 简称IGBT)、双极结型晶体管(Bipolar Junction Transistor,简称BJT)等,举例来说,可控开关35具体可以包括两个反向串联的M0SFET,具体的,由于M0SFET本身具有并联在源极和漏极之间的寄生二极管,使得其本身处于截止状态时,电流仍然能够单方向通过,因此采用两个反向串联的M0SFET,在截止状态下,阻止任意方向的电流通过;或者,可控开关35也可以为可控的机械开关,例如,继电器,再或者,可控开关35还可以为能够实现导通和截止这两种工作状 [0030] wherein the controllable switch 35 may be specifically, a current conduction in any direction and of any controllable switching means is turned off between these two operating states of the switch can be achieved, for example, the controllable switch 35 The semiconductor device may include, e.g., metal - oxide semiconductor field effect transistor (metal-oxide-semiconductor field-effect transistor, referred M0SFET), insulated gate bipolar transistors (insulated gate bipolar transistor, referred to as the IGBT), bipolar junction transistors (Bipolar Junction transistor, referred BJT) and the like, for example, comprise a controllable switch 35 may specifically M0SFET two anti-series, in particular, since M0SFET itself has a parasitic diode in parallel between the source and the drain, when such that it itself is off, current is still able to pass in one direction, thus using reverse M0SFET two series, in the oFF state, preventing current through arbitrary direction; or, may be a controllable switch 35 controlled mechanical switch, e.g., a relay, or again, a controllable switch 35 may also be turned on and off to achieve both shape work 的电路结构,本实施例在此不对其具体实施方式进行限制。 The circuit configuration, the present embodiment is not limited in this particular embodiment thereof.

[0031 ]具体的,如图1所示,在本实施例中,次级整流电路的基本结构采用桥式整流,并且巧妙地在变压电路2〇的次级绕组21的一端与输出滤波电容,即第一电容36和第二电容37, 的中间连接点通过可控开关35相连,从而通过改变可控开关35的工作状态,可以将次级整流形式在桥式整流和倍压整流之间进行切换。 [0031] Specifically, as shown, in the present embodiment, the basic configuration of the secondary rectifier circuit using a bridge rectifier, one end of the winding and skillfully the output filter capacitor 21 in the secondary transformer circuit 2〇 , i.e., a first intermediate capacitor 36 and second capacitor 37, is connected via a controllable switch 35 is connected to the point, so that by changing the operating state of the controllable switch 35 can be in the form of secondary rectification and voltage doubler rectifier bridge rectifier between to switch.

[0032] 为了更好的理解本方案,图2和图3为本发明实施例一提供的所述直流-直流转换电路的等效电路示意图。 The equivalent circuit schematic of the converter circuit - [0032] For a better understanding of the present embodiment, FIGS. 2 and 3, the present embodiment provides a direct current embodiment of the invention. 具体的,图2为可控开关35处于截止状态下的等效电路示意图,可以理解,在可控开关35截止的情形下,次级整流电路的整流方式为桥式整流。 Specifically, FIG. 2 is a controllable switch 35 is a schematic view of an equivalent circuit in the OFF state, be appreciated that, in the case of a controllable switch 35 is turned off, the secondary rectifier bridge rectifier for the rectifier circuit. 再具体的,图3 为可控开关35处于导通状态下的等效电路示意图,可以理解,在可控开关35导通的情形下, 次级整流电路的整流方式为倍压整流。 Specifically then, the controllable switch 35 in FIG. 3 is a schematic diagram of an equivalent circuit is in the ON state, to be understood that, in the case of the controllable switch 35 is turned on, the secondary rectifier circuit for rectifying voltage doubler rectifier.

[0033] 理论上,在条件等同的情形下,倍压整流的输出电压是桥式整流的输出电压的两倍。 [0033] Theoretically, under the conditions equivalent to the case, the output voltage of the voltage doubler rectifier is twice the output voltage of the bridge rectifier. 因此,当拓扑的输入电压较高或需要较低的输出电压时,次级整流方式可以采用桥式整流;当输入电压较低或需要较高的输出电压时,次级整流方式可以采用倍压整流。 Accordingly, when the input voltage or higher topology requires a lower output voltage, the secondary rectifier bridge rectifier may be employed; when the input voltage is low or require a higher output voltage, the secondary voltage doubler rectifier may be employed rectified. 而基于本实施例提供的电路,基于不同场景,通过改变可控开关35的工作状态,即可切换次级整流方式,以实现对输出电压的辅助调节,从而适应宽范围变化的输入、输出电压的场景。 The circuit of this embodiment is provided based on different scenarios, by changing the operating state of the controllable switch 35, to switch the secondary rectifier, to achieve a regulation of the output voltage of the auxiliary, to accommodate widely varying input and output voltages scene.

[0034]具体的,通过电路的工作状态,例如,输入电压、输出电压、电流等,可以对可控开关35的工作状态进行决策控制,以适应宽范围变化的输入、输出电压的场景。 [0034] Specifically, the operating state of the circuit, e.g., input voltage, output voltage, current, etc., may make decisions to control the operation state of the controllable switch 35 to accommodate a wide range of input scene changes, the output voltage. 例如,当拓扑的输入电压较高,输出电压较低时,则可控制可控开关35为截止状态,则相应的,当前采用的次级整流方式为桥式整流。 For example, when the topology of the input voltage is high, the output voltage is low, the controllable switch 35 can be controlled to the OFF state, and accordingly, the secondary rectifier bridge rectifier is currently employed. 反之,当拓扑的输入电压较低,输出电压较高时,则可控制可控开关35为导通状态,则相应的,当前采用的次级整流方式为倍压整流。 Conversely, when the input voltage is low topology, higher output voltage, the controllable switch 35 can be controlled to a conducting state, the corresponding secondary current rectifier voltage doubler rectifier is used.

[0035] 在实际应用中,基于不同场景对可控开关35进行控制可以有多种实现方式,例如, 可以依赖模拟电路实现,或者,也可以用模拟电路、数字电路混合实现,再例如,还可以通过包括外围电路的微控制单元(Micro Control Unit,简称MCU)、单片机、数字信号处理(Digital Signal Process,简称DSP)芯片等编写程序实现。 [0035] In practical applications, based on different scenarios for controlling the controllable switch 35 can be implemented in many ways, for example, may depend on analog circuit, or may be analog circuitry, digital circuitry to achieve mixing, and then, for example, further can, microcontroller, digital signal processing (digital signal process, referred to as DSP) chips and the like is achieved by programming the MCU (micro control unit, abbreviated MCU) comprises a peripheral circuit.

[0036]本实施例提供的直流-直流转换电路,在不同的场景下,通过控制可控开关的截止和导通,使直流-直流转换电路的次级整流电路的形式可以在桥式整流和倍压整流中进行相应的切换。 [0036] The present embodiment provides the DC - DC converter circuit, in different scenarios, and turned off by controlling the controllable switch, the DC - DC converter circuit form a secondary rectifier circuit may be in the bridge rectifier and voltage doubler rectification switching accordingly. 由于同等条件下,倍压整流的输出电压通常高于桥式整流的输出电压,因此, 能够适用在输入电压较低、输出电压较高的场景,相反的,桥式整流则可以适用在输入电压较高、输出电压较低的场景,从而通过对次级整流形式的切换实现对输出电压的辅助调节, 即使在宽范围变化的输入、输出电压的场景下,仍可有效保证转换效率。 Since under the same conditions, the voltage doubler rectified output voltage is generally higher than the output voltage of the bridge rectifier, and therefore can be applied at low input voltages, output voltages higher scene, opposite, bridge rectifier input voltage may be applied higher, lower output voltage scene, in order to achieve regulation of the output voltage of the auxiliary switch of the secondary rectified by the form, even under a wide range of input scene changes, the output voltage, the conversion efficiency can still be effectively guaranteed.

[0037]为了实现基于不同场景对可控开关的工作状态进行控制,以适应宽范围变化的输入、输出电压的场景,图4为本发明实施例二提供的直流-直流转换电路的结构示意图,如图4所示,所述直流-直流转换电路还包括: [0037] In order to achieve different scenarios based on the operating state of the controllable switch control, to accommodate a wide variation in the input scene, the output voltage, the DC FIG. 4 according to a second embodiment of the present invention - DC converter circuit structure diagram, 4, the DC - DC converter circuit further comprises:

[0038]与可控开关35连接的控制器40,用于对可控开关35的工作状态进行控制。 [0038] The controller 35 is connected to the controllable switch 40 for the operation state of the controllable switch 35 is controlled.

[0039]可选的,控制器40可以根据所述直流-直流转换电路的输入电压和输出电压,确定当前需要采取何种整流方式,进而根据当前需要采取的整流方式,控制可控开关35的工作状态,相应的,图5为本发明实施例二中所述控制器的结构示意图,如图5所示,所述控制器包括: [0039] Alternatively, the controller 40 may direct the - input and the output voltage of the DC voltage conversion circuit, which determines the need for a current rectifier, the rectifier further embodiment according to the current need to be taken to control the controllable switch 35 operation state, the corresponding FIG. 5 is a structural schematic diagram according to a second embodiment of the invention, in the controller shown in Figure 5, the controller comprising:

[0040]采集单元41,用于获取所述直流-直流转换电路当前的输入电压和输出电压; [0040] The acquisition unit 41, configured to obtain the DC - DC converter input current and output voltage;

[0041]处理单元42,与采集单元41连接,用于根据所述输入电压和所述输出电压,确定当前需要采用的整流方式; [0041] The processing unit 42, the acquisition unit 41 is connected, according to the input voltage and the output voltage determines the current rectifier to be utilized;

[0042]控制单元43,与处理单元42连接,用于若当前需要采用的整流方式为倍压整流,则控制可控开关35导通,若当前需要米用的整流方式为桥式整流,控制可控开关35截止。 [0042] The control unit 43, connected to the processing unit 42, and if the current required for the rectifier voltage doubler rectifier is used, the controllable switch 35 is turned on, if the current rectifier used is required meter bridge rectifier, control controllable switch 35 is turned off.

[0043] 具体的,控制器40可以根据所述直流-直流转换电路的输入电压Vin与输出电压V〇的比值或者输出电压Vo与输入电压Vin的比值,S卩Vin/Vo或者Vo/Vin,对可控开关35进行决策控制。 [0043] Specifically, the controller 40 may direct the - ratio of the input voltage Vin and the output voltage of the converter circuit V〇 or the ratio of the output DC voltage Vo and input voltage Vin, S Jie Vin / Vo or Vo / Vin, controllable decision control switch 35. 进一步具体的,当Vin/Vo较大或者Vo/Vin较小时,也就是说,当拓扑的输入电压较高,输出电压较低时,则控制可控开关35为截止状态,则相应的,当前采用的次级整流方式为桥式整流。 Further Specifically, when Vin / Vo larger or Vo / Vin is small, that is, when the topology of the input voltage is high, the output voltage is low, the controllable switch 35 is OFF state, and accordingly, the current the secondary rectifier bridge rectifier is used. 反之,当Vin/Vo较小或者Vo/Vin较大时,也就是说,当拓扑的输入电压较低,输出电压较高时,则控制可控开关35为导通状态,则相应的,当前采用的次级整流方式为倍压整流。 Conversely, when Vin / Vo smaller or Vo / Vin is large, i.e., when the input voltage is low topology, when the output voltage is high, the controllable switch 35 to the ON state, the corresponding current the secondary rectifier voltage doubler rectifier is used. 则相应的,处理单元42具体可以包括: And accordingly, the processing unit 42 may include:

[0044] 第一计算子单元,用于计算所述输入电压与所述输出电压的比值;第一处理子单元,用于若所述比值小于第一门限值,则确定当前需要采用的整流方式为倍压整流,否则, 确定当前需要采用的整流方式为桥式整流;或者, [0044] a first calculating subunit, configured to calculate the ratio of the input voltage and the output voltage; a first processing sub-unit, configured to, if the ratio is less than the first threshold value, it is determined that the current rectifier to be utilized mode of voltage doubler rectifier, otherwise, determining that the current rectifier need for bridge rectifier; or

[0045] 所述第一计算子单元,用于计算所述输出电压与所述输入电压的比值;所述第一处理子单元,用于若所述比值大于所述第一门限值的倒数,则确定当前需要采用的整流方式为倍压整流,否则,确定当前需要采用的整流方式为桥式整流。 [0045] The first calculating subunit, configured to calculate the ratio of the output voltage and the input voltage; the first processing sub-unit, configured to, if the ratio is greater than the first threshold value of the reciprocal of it is determined that the current need for the rectifier voltage doubler rectifier, otherwise, to determine the rectifier current need for bridge rectifier.

[0046] 可选的,所述第一门限值可以为预设的值,即所述第一门限值可以为某固定的值。 [0046] Alternatively, the first threshold value may be a predetermined value, i.e., the first threshold value may be a fixed value. 具体的,所述第一门限值可以根据实际的应用场景和经验确定。 Specifically, the first threshold value may be determined based on actual application scenarios and experience.

[0047]具体的,采集单元41具体可以通过电压传感器,获取所述直流-直流转换电路当前的输入电压和输出电压获取所述直流-直流转换电路当前的输入电压和输出电压。 [0047] Specifically, the acquisition unit by a voltage sensor 41 may be specifically, acquiring the direct - current input voltage and the output voltage of the DC-DC converter circuit acquires - DC converter input current and output voltage.

[0048] 在实际应用中,当直流-直流转换电路的预期输入电压或输出电压变化范围较窄时,可以将变化范围较窄的电压视为恒定的某个值,则根据预设的Vin/Vo与第一门限值R, 或者Vo/Vin与所述第一门限值的倒数1/R的关系,计算相应的对比值K,从而只需参照另一电压的变化情况即可对可控开关35的工作状态进行控制。 [0048] In practice, when the DC - DC converter circuit when the expected input voltage or output voltage range is narrow, a narrow range of variation can be considered to be constant voltage of a certain value, according to the predetermined Vin / Vo is the first threshold value R, or the relationship Vo / Vin with the first threshold value reciprocal 1 / R, the calculation of the ratio of the respective K, so that only reference voltage changes to another pair the operating state control switch 35 is controlled.

[0049]以Vin/Vo与第一门限值R的关系为例,假设某电源是要适应宽范围输出电压而稳定输入电压不变,则可视为输入电压Vin是恒定的。 [0049] In relation Vin / Vo with threshold value R of the first example, assume that a power supply to adapt to a wide range of input voltage the output voltage constant and stable, may be regarded as the input voltage Vin is constant. 由于计算Vin/Vo需要计算除法,通过模拟电路实现除法的计算比较复杂,因此判断Vin/Vo与第一门限值R的关系比较复杂,而判断Vo与Vin/R的关系则相对来说比较简单,具体的,由于Vin是恒定的,因此可以预先计算对比值K,此时K = Vin/R,则相应的,可以只需根据变化的Vo与K的比较结果,即可对可控开关35 的工作状态进行控制。 Since the calculation Vin / Vo need to calculate the division, the division calculation by an analog circuit implementation is more complex, it is determined Vin / Vo the first threshold value R of the more complex relationship, the relationship is determined Vo and Vin / R is relatively simple, specific, since Vin is constant, the ratio K can be calculated in advance, this time K = Vin / R, and accordingly, can be simply Vo and K based on the comparison of the change of the controllable switch to the operating state 35 is controlled. 也就是说,将可控开关35的控制策略等效为,只需判断Vo与K的大小关系:Vo大于K时,采用倍压整流,控制可控开关35导通,反之,则采用桥式整流,控制可控开关35截止。 That is, the control strategy controllable switch 35 is equivalent to simply determining the magnitude relationship between Vo and K: When Vo is greater than K, using the voltage doubler rectifier, the controllable switch 35 is turned on, and vice versa, using the bridge rectifier, the controllable switch 35 is turned off.

[0050] 再例如,某电源是要适应宽范围输入电压而稳定输出电压不变,则可视为输出电压Vo是恒定的,因此可以预先计算对比值K,此时K = V〇XR,进而只需根据变化的Vin与K的比较结果,即可对可控开关35的工作状态进行控制。 [0050] As another example, a power supply to adapt to a wide range of input voltage regulated output voltage constant, Vo is the output voltage can be considered constant, the ratio can be calculated in advance for K, K = V〇XR case, further just Vin and the result of the comparison of the changes in K, to the operation state of the controllable switch 35 is controlled. 也就是说,将可控开关35的控制策略等效为,只需判断Vin与K的大小关系:Vin大于K时,采用桥式整流,控制可控开关35截止,反之,则采用倍压整流,控制可控开关35导通。 That is, the control strategy controllable switch 35 is equivalent to simply determine the size relationship between Vin and the K: when Vin is greater than K, using the bridge rectifier, the controllable switch 35 is turned off, and vice versa, using the voltage doubler rectifier , the controllable switch 35 is turned on.

[0051] 需要说明的是,参照上述方法,在根据Vo/Vin与所述第一门限值的倒数1/R的关系,确定整流方式的方案中,同样可以只需参照其中一种电压的变化情况即可对可控开关35的工作状态进行控制。 [0051] Incidentally, referring to the method described above, in accordance with the relationship Vo / Vin with the reciprocal of the first threshold value 1 / R is determined rectifier scheme, reference may also be only one voltage changes to the operation state of the controllable switch 35 is controlled.

[0052]可选的,为了更好地适用宽范围变化的输入、输出电压的场景,还可以将直流-直流转换电路的输出电流作为可控开关35的控制策略中的附加参数,则相应的,采集单元41, 与控制单元42连接,还用于获取所述直流-直流转换电路当前的输出电流,以使控制单元43 根据所述输出电流控制可控开关35。 [0052] Alternatively, better suited to a wide range of input scene changes, the output voltage may also be a DC - DC converter output current as an additional parameter of the controllable switch 35 in the control strategy, the corresponding acquisition unit 41, 42 is connected to the control unit is further configured to obtain the DC - DC converter output current of the current circuit, so that the control unit 43 according to the output current of the controllable switch 35.

[0053] 作为一种可实施方式,所述输出电流可以直接用于参与对可控开关35的控制策略,具体的,在前述的控制策略的基础上,进一步的,当输出电流较低时,倾向于采用桥式整流,当输出电流较高时,倾向于采用倍压整流。 [0053] As an embodiment, the output current may be directly involved in the control strategy for the controllable switch 35, specifically, on the basis of the control strategy, further, when the output current is low, We tend to use bridge rectifier, when high output current, tend to use voltage doubler rectifier. 则相应的,控制单元43,具体用于根据所述输入电压和所述输出电压,确定当前需要采用的整流方式为倍压整流,且所述输出电流大于第三门限值,则控制所述可控开关导通,否则,控制所述可控开关截止。 And accordingly, the control unit 43 is specifically configured according to the input voltage and the output voltage, current rectifier is determined to be utilized for the voltage doubler rectifier, and the output current is greater than the third threshold value, the control controllable switch is turned on, otherwise, controlling the controllable switch is turned off. 其中,所述第三门限值同样可以为预设的值,即所述第三门限值可以为某固定的值。 Wherein said third predetermined threshold value may be the same value, i.e., the third threshold value may be a fixed value. 具体的,所述第三门限值可以根据实际的应用场景和经验确定。 Specifically, the third threshold value may be determined based on actual application scenarios and experience. _ _

[0054] 作为另一种可实施方式,所述输出电流还可以用于实时对所述第一门限值进行调整,从而间接参与对可控开关35的控制策略。 [0054] As another embodiment, the output current may also be used in real time for the first threshold value is adjusted indirectly involved in the control strategy of the controllable switch 35. 则相应的,控制器40还可以包括: And accordingly, the controller 40 may further comprise:

[0055] 第一调整单元,与采集单元41和控制单元43连接,用于根据所述输出电流,调整所述第一门限值,以使控制单元43根据当前的所述第一门限值控制可控开关35。 [0055] The first adjustment unit, the acquisition unit 41 and the control unit 43 is connected, according to said output current, adjusting the first threshold value, the control unit 43 so that the first current threshold value controlling the controllable switch 35.

[0056] 可以理解,在本实施方式中,所述第一门限值不是固定不变的值,而是根据输出电流实时更新的值。 [0056] It will be appreciated that in the present embodiment, the first threshold value is not a fixed value but a value updated in real time according to the output current. 具体的,根据所述输出电流对所述第一门限值进行调整的策略可以通过数学算法实现,本实施例在此不对其具体调整策略进行限制。 Specifically, according to the strategy output current to the first threshold value may be adjusted by a mathematical algorithm, according to the present embodiment is not to be limiting thereof In this particular adjustment strategy.

[0057]通过上述两种实施方式,均能够在根据输入电压和输出电压,对可控开关的工作状态进行控制的基础上,结合输出电流的因素,综合考虑可控开关当前的工作状态,进而使得直流_直流转换电路可以更好地适用宽范围变化的输入、输出电压的场景。 [0057], are possible in accordance with the input voltage and output voltage, the operating state of the controllable switch by the above-described two embodiments based on the control of the output current of the binding factor, considering the current operating state of the controllable switch, and further DC-DC converter circuit such that _ may be better applied widely varying scene input and output voltage.

[0058]需要说明的是,前述的各实施方式既可以单独实施,也可以结合实施,例如,所述输出电流既可以直接参与对可控开关的控制策略,也同时可以用于间接参与对可控开关的控制策略,本实施例在此不对其进行限制。 [0058] Incidentally, the above-described embodiments may be implemented either alone or in combination may be implemented, for example, the output current may be directly involved in the control strategy of the controllable switch, it can also be used for indirect participation controlled switch control strategy, the present embodiment is not be limited in this.

[0059]再可选的,为了更好地适用宽范围变化的输入、输出电压的场景,还可以引入更多的条件因素,例如,温度等,参与对可控开关的决策控制。 [0059] Alternatively again, is better suited for a wide range of input scene changes, the output voltage, a condition can introduce more factors, e.g., temperature, etc., involved in the decision control of the controllable switch. 则相应的,采集单元41,还用于采集当前的温度;控制器40还可以包括: And accordingly, the acquisition unit 41 for acquiring further current temperature; the controller 40 may further comprise:

[0060] 第二调整单元,与采集单元41和控制单元43连接,用于根据所述温度,调整所述第一门限值,以使控制单元43根据当前的所述第一门限值控制所述可控开关。 [0060] The second adjustment unit, the acquisition unit 41 and the control unit 43 is connected, according to said temperature, adjusting the first threshold value, the control unit 43 so that the first current threshold control the controllable switch.

[0061] 通过本实施方式,均能够在根据输入电压和输出电压的比值,对可控开关的工作状态进行控制的基础上,结合其它影响因素,综合考虑可控开关当前的工作状态,进而使得直流-直流转换电路可以更好地适用宽范围变化的输入、输出电压的场景。 [0061] By the present embodiment, are possible in accordance with the ratio of input voltage and output voltage, the operating state of the controllable switch is controlled based on the combination of other factors, considering the current operating state of the controllable switch, and further such that DC - DC converter circuit may be better suited for a wide range of changes in scene input and output voltage.

[0062]可选的,为避免可控开关的工作状态反复切换,控制器40在检测到可控开关的工作状态需要切换时,可以先不进行切换控制,而是在经过一定时长后,再次检测当前是否仍需要切换可控开关的工作状态,若仍需要,则对可控开关的工作状态进行切换。 [0062] Alternatively, to avoid repeated switching state of the controllable switch, the controller 40 detects the operating state of the controllable switch to be switched, switching control may not be the first, but after a certain length of time, again detecting a current still need to switch the operating state of the controllable switch, if still necessary, the operating state of the controllable switch to be switched.

[0063] 再可选的,还可以通过在所述第一门限值中引入上下限值,改善因噪声影响而反复切换可控开关的工作状态的问题。 [0063] Alternatively again, it can be introduced through the first upper and lower limit threshold value, the improvement effect of noise problems caused by repeatedly switching the operating state of the controllable switch. 具体的,仍以Vin/Vo与第一门限值R的关系举例来说, 假设所述第一门限值为10,即10是可控开关35两种工作状态切换的分界点,那么改善噪声问题的方法可以包括:所述第一门限值包括下限值9和上限值11,当Vin/Vo小于9时,控制所述可控开关工作于导通状态,当Vin/Vo大于11时,控制所述可控开关工作于截止状态,当Vin/Vo处于9和11之间时,维持当前的可控开关的工作状态不变。 Specifically, the still Vin / Vo relationship with the first threshold value R of example, if the first threshold is 10, i.e., the controllable switch 10 is a demarcation point 35 to switch the two operating states, the improvement the method may include noise problem: the first threshold value includes an upper limit and a lower limit value 9 11, when Vin / Vo is less than 9:00, controlling the controllable switch at a conductive state, when Vin / Vo is greater than 11, controls the controllable switch at oFF state, when between 9 and 11 Vin / Vo is, to maintain the current operating state of the controllable switch unchanged. 结果就是,比值从很小持续上升至超过11时,状态由导通状态切换为截止状态;当这时出现噪声,导致Vin/Vo在10〜 12之间波动时,保持可控开关的当前工作状态不变。 When the result is that, from a small ratio to continue to rise more than 11, the state is switched from ON state to OFF state; time when noise occurs, leading to Vin / Vo fluctuates between 10~ 12, maintaining the current operating controllable switch unchanged. 也就是说,只要噪声的幅度不超过2,则不会影响可控开关的工作状态。 That is, as long as the amplitude of the noise does not exceed 2, does not affect the operating state of the controllable switch.

[0064] 本实施例提供的直流_直流转换电路,在不同的场景下,通过控制器结合相应的控制策略,控制可控开关的截止和导通,使直流-直流转换电路的次级整流电路的形式可以在桥式整流和倍压整流中进行相应的切换,通过对次级整流形式的切换实现对输出电压的辅助调节,即使在宽范围变化的输入、输出电压的场景下,仍可有效保证转换效率。 [0064] _ DC-DC converter circuit provided in the present embodiment, in different scenarios, by the controller in conjunction with the corresponding control strategy, the control is turned on and off controllable switch, the DC - DC converter secondary circuit rectifier circuit the form may be in the appropriate switching bridge rectifier and voltage doubler rectification, a cofactor achieved by switching the output voltage of the secondary rectified form, even under a wide range of input scene changes, the output voltage, can still be effective ensure conversion efficiency.

[0065] 需要说明的是,在本实施例中提及的各整流单元,具体可以为单个整流器件,则相应的,整流单元的正负极,即分别为该整流器件的正极和负极。 [0065] Incidentally, each of the rectifying unit referred to in the present embodiment, particularly a rectifier may be a single member, and accordingly, the positive and negative rectifying unit, i.e., positive and negative electrodes, respectively, for rectifying devices. 此外,所述各整流单元,具体还可以为多个整流器件并联和/或串联后仍可等效为一个整流器件的电路,该整流单元可以实现单个整流二极管所实现的功能,即相当于单个整流二极管。 Further, each of the rectifying unit, a plurality of rectifying devices may also be specifically connected in parallel and / or after the series equivalent circuit of a still rectifier element, the rectifier unit may fulfill the functions implemented by a single rectifier diode, which is equivalent to a single rectifier diode. 也就是说,所述第一整流单元、所述第二整流单元、所述第三整流单元和所述第四整流单元具体可以包括:一个整流器件,或者以并联和/或串联方式连接的多个整流器件,则相应的,整流单元的正负极,为该整流单元所相当于的单个整流二极管的正极和负极。 That is, the first rectifying unit, the second rectifying means, said third and said fourth rectifying means rectifying unit specifically comprises: a rectifier element, or in parallel and / or series connected plurality a rectifier device, and accordingly, the positive and negative rectifying elements, positive rectifying unit for the equivalent of a single rectifier diode and the negative electrode. 其中,所述整流器件可以包括但不限于:整流二极管、M0SFET等。 Wherein the rectifier device can include, but are not limited to: a rectifier diode, M0SFET like.

[0066]具体的,对于整流器件为整流二极管的情形,则所述整流器件的正负极即分别为整流二极管的正极和负极,对于整流器件为M0SFET的情形,则所述整流器件的正负极可以根据M0SFET体二极管确定。 [0066] Specifically, for the case of rectifier diode rectifier device, the rectifier device of the positive and negative electrodes, respectively, i.e., positive electrode and the negative rectifier diode for rectifying devices is M0SFET case, then the positive and negative rectifier element The electrode may be determined M0SFET body diode. - -

[0067]此外,在直流-直流转换电路中,包括至少一个次级整流电路为本发明实施例中所述的次级整流电路的电路结构,均应在本专利的范围内。 [0067] Further, in the DC - DC conversion circuit, comprising at least one secondary rectifying circuit is a circuit structure of the rectifier circuit of the secondary embodiment of the invention, shall be within the scope of this patent.

[0068] 在实际应用中,针对宽范围变化的输入、输出电压的场景,现有的次级整流电路还可以通过一些非桥式拓扑或者多级拓扑实现,例如,一些基本拓扑和桥式电路的组合。 [0068] In practice, for a wide variation in the input scene, the output voltage, conventional secondary rectifier circuit may by non-bridge topology or a multi-level topology enables, for example, some of the basic bridge circuit topology and The combination. 但是,上述方案的电路通常都比较复杂。 However, the above-described circuit solutions are usually complicated. 相比于上述方案,本实施例本实施例提供的直流-直流转换电路,在不同的场景下,通过控制器结合相应的控制策略,控制可控开关的截止和导通,使直流-直流转换电路的次级整流电路的形式可以在桥式整流和倍压整流中进行相应的切换,通过对次级整流形式的切换实现对输出电压的辅助调节,即使在宽范围变化的输入、输出电压的场景下,仍可有效保证转换效率,且电路简单易实现。 Compared to the above-described embodiment, the present embodiment of the present embodiment provides the DC - DC converter circuit, in different scenarios, by the controller in conjunction with the corresponding control strategy, the control is turned on and off controllable switch, the DC - DC converter secondary rectifier circuit in the form of a circuit can be switched in a corresponding bridge rectifier and voltage doubler rectification by the switching of the auxiliary secondary rectification achieved in the form of regulation of the output voltage, even in the wide variation in the input, the output voltage scenario, the conversion efficiency can still be effectively guaranteed, and the circuit is simple and easy to implement.

[0069]本领域普通技术人员可以理解:实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。 [0069] Those of ordinary skill in the art will be appreciated that: each of the foregoing methods to complete all or part of the procedure of Example hardware may be associated by program instructions embodiment. 前述的程序可以存储于一计算机可读取存储介质中。 The program may be stored in a computer readable storage medium. 该程序在执行时,执行包括上述各方法实施例的步骤;而前述的存储介质包括:R〇M、RAM、磁碟或者光盘等各种可以存储程序代码的介质。 When the program is executed, comprising the step of performing the above-described method of the embodiment; and the storage medium comprising: a variety of medium may store program codes R〇M, RAM, magnetic disk, or optical disk.

[0070]最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。 [0070] Finally, it should be noted that: the above embodiments only describe the technical solutions in embodiments of the present invention, rather than limiting;. Although the embodiments of the present invention has been described in detail, those of ordinary skill in the art should appreciated: it still may be made to the technical solutions described embodiments modifications, or to some or all of the technical features equivalents; as such modifications or replacements do not cause the essence of corresponding technical solutions to depart from embodiments of the present invention range of technical solutions.

Claims (8)

  1. 1. 一种直流-直流转换电路,其特征在于,包括:依次连接的桥式电路、变压电路和次级整流电路;所述次级整流电路包括: 第一整流单元、第二整流单元、第三整流单元、第四整流单元、可控开关、第一电容、以及第二电容;其中, 所述第一整流单元的正极与所述第二整流单元的负极和变压电路的次边绕组的一端连接,所述第三整流单元的正极与所述第四整流单元的负极、所述次边绕组的另一端和所述可控开关的一端连接; 所述第一电容的一端和所述第二电容的一端均与所述可控开关的另一端连接,所述第一电容的另一端连接至所述第一整流单元和所述第三整流单元的负极,所述第二电容的另一端连接至所述第二整流单元和所述第四整流单元的正极; 所述直流-直流转换电路还包括:与所述可控开关连接的控制器,所述控制器包括: 采集单元,用于 1. A DC - DC converter circuit comprising: a bridge circuit connected in sequence, a transformer circuit and a secondary rectifier circuit; said secondary rectifier circuit comprises: a first rectifying unit, the second rectifying unit, third rectifying means, a fourth rectifying unit, a controllable switch, a first capacitor and a second capacitor; times wherein the positive electrode and the negative electrode of the first rectifying element and the second rectifier transformer circuit winding unit connected to one end, an end of the positive electrode and the negative electrode of the third rectifying unit of the fourth rectifying means, the other end of the secondary winding and the controllable switch is connected; a first end of said capacitor and said each end of the second capacitor and the other end is connected to the controllable switch, the other end of the first capacitor is connected to the cathode of the first rectifier unit and the third rectifying unit, the further second capacitor one end connected to an anode of the second rectifying element and the fourth rectifying unit; said DC - DC converter circuit further comprising: a controller coupled to the controllable switch, said controller comprising: a collection unit, with in 取所述直流-直流转换电路当前的输入电压和输出电压; 处理单元,与所述采集单元连接,用于根据所述输入电压和所述输出电压,确定当前需要采用的整流方式; 控制单元,与所述处理单元连接,用于若当前需要采用的整流方式为倍压整流,则控制所述可控开关导通,若当前需要采用的整流方式为桥式整流,控制所述可控开关截止; 第一调整单元,与所述采集单元和所述控制单元连接,用于根据所述采集单元采集的所述直流-直流转换电路当前的输出电流,调整第一门限值,以使所述控制单元根据当前的所述第一门限值控制所述可控开关; 所述处理单元包括: 第一计算子单元,用于计算所述输入电压与所述输出电压的比值;第一处理子单元,用于若所述比值小于所述第一门限值,则确定当前需要采用的整流方式为倍压整流,否则,确定当前需要 Taking the DC - DC converter circuit of the current input and output voltages; a processing unit, connected to the collecting unit, according to the input voltage and the output voltage determines the current need rectifier; a control unit, the processing unit is connected to, for rectifying the current embodiment, if the need for the voltage doubler rectifier, control the controllable switch is turned on, if the current rectifier bridge rectifier need for controlling the controllable switch is turned off ; first adjustment unit, the collecting unit and the control unit is connected, according to the current collecting unit collecting the - DC converter circuit of the current output current, adjusting the first threshold value, so that the controlling the controllable switch means according to the current controlling said first threshold value; wherein the processing unit comprises: a first calculating subunit, configured to calculate the ratio of the input voltage and the output voltage; first processing sub means for if the ratio is smaller than the first threshold value, it is determined that the current need for the rectifier voltage doubler rectifier, otherwise, determining that the current required 用的整流方式为桥式整流;或者, 所述第一计算子单元,用于计算所述输出电压与所述输入电压的比值;所述第一处理子单元,用于若所述比值大于所述第一门限值的倒数,则确定当前需要采用的整流方式为倍压整流,否则,确定当前需要采用的整流方式为桥式整流。 Rectifier bridge rectifier is used; alternatively, the first calculating sub-unit, and calculating a ratio of the output voltage for the input voltage; the first processing sub-unit, configured to, if said ratio is greater than the the reciprocal of said first threshold value, determining the current need for the rectifier voltage doubler rectifier, otherwise, determining that the current rectifier need for bridge rectifier.
  2. 2. 根据权利要求1所述的直流-直流转换电路,其特征在于, 所述采集单元,与所述控制单元连接,还用于获取所述直流-直流转换电路当前的输出电流,以使所述控制单元根据所述输出电流控制所述可控开关。 According to claim 1 said DC - DC converter circuit, wherein the acquisition unit connected to the control unit is further configured to obtain the DC - DC converter circuit the output currents, so that the said control means controlling said output current in accordance with the controllable switch.
  3. 3. 根据权利要求2所述的直流-直流转换电路,其特征在于, 所述控制单元,具体用于若根据所述输入电压和所述输出电压,确定当前需要采用的整流方式为倍压整流,且所述输出电流大于第三门限值,则控制所述可控开关导通,否则, 控制所述可控开关截止。 The direct current according to claim 2 - DC conversion circuit, wherein said control unit is configured and if the output voltage from the input voltage, determining a current need for the rectifier voltage doubler rectifier , and the output current is greater than the third threshold value, controlling the controllable switch is turned on, otherwise, controlling the controllable switch is turned off.
  4. 4.根据权利要求1所述的直流-直流转换电路,其特征在于,所述第一门限值为预设的值。 According to claim 1 said DC - DC converter circuit, wherein said first threshold value is a preset value.
  5. 5.根据权利要求1-3中任一项所述的直流-直流转换电路,其特征在于,所述采集单元, 还用于采集当前的温度;所述控制器还包括: 第二调整单元,与所述采集单元和所述控制单元连接,用于根据所述温度,调整所述第一门限值,以使所述控制单元根据当前的所述第一门限值控制所述可控开关。 The DC according to any one of claims - DC conversion circuit, wherein the acquisition unit is further configured to collect current temperature; said controller further comprises: a second adjustment means, unit and the control unit is connected to the collection, according to the temperature, adjusting the first threshold value, so that the current control unit in accordance with the first threshold value controlling the controllable switch .
  6. 6.根据权利要求1-3中任一项所述的直流-直流转换电路,其特征在于,所述第一整流单元、所述第二整流单元、所述第三整流单元和所述第四整流单元包括:一个整流器件,或者以并联和/或串联方式连接的多个整流器件。 The DC according to any one of claims - DC conversion circuit, wherein the first rectifying unit, the second rectifying unit, the third unit and the fourth rectifying rectifying unit comprises: a rectifier element, a plurality of rectifying devices or in parallel and / or series connection.
  7. 7.根据权利要求6所述的直流-直流转换电路,其特征在于,所述整流器件为整流二极管或者MOSFET。 7. DC according to claim 6 - DC conversion circuit, wherein the rectifier element is a rectifier diode or a MOSFET.
  8. 8.根据权利要求1-3中任一项所述的直流-直流转换电路,其特征在于,所述可控开关包括MOSFET、IGBT、B JT或者继电器。 The DC according to any one of claims - DC conversion circuit, characterized in that said controllable switch comprises a MOSFET, IGBT, B JT or relay.
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