WO2019129311A1 - Control method, apparatus, device, and medium for power factor correction pfc circuit - Google Patents

Control method, apparatus, device, and medium for power factor correction pfc circuit Download PDF

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WO2019129311A1
WO2019129311A1 PCT/CN2019/076451 CN2019076451W WO2019129311A1 WO 2019129311 A1 WO2019129311 A1 WO 2019129311A1 CN 2019076451 W CN2019076451 W CN 2019076451W WO 2019129311 A1 WO2019129311 A1 WO 2019129311A1
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pfc circuit
circuit
control
preset
parameter information
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PCT/CN2019/076451
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French (fr)
Chinese (zh)
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向博
李剑
杨瑞国
傅华兴
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沃尔缇夫能源系统公司
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Priority to CN201711489322 priority Critical
Priority to CN201711489322.7 priority
Priority to CN201811046050 priority
Priority to CN201811046050.8 priority
Priority to CN201811209229.0 priority
Priority to CN201811209229.0A priority patent/CN109995230A/en
Application filed by 沃尔缇夫能源系统公司 filed Critical 沃尔缇夫能源系统公司
Priority claimed from AU2019204890A external-priority patent/AU2019204890B2/en
Publication of WO2019129311A1 publication Critical patent/WO2019129311A1/en

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00Details of apparatus for conversion
    • H02M1/42Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

Disclosed in embodiments of the present invention are a control method, apparatus, device, and medium for a power factor correction (PFC) circuit, used for solving the problems of high implementation costs and relatively severe THD that exist in existing PFC circuit control methods. The control method for a power factor correction (PFC) circuit, comprising: acquiring circuit parameter information of the PFC circuit; when determining that the circuit parameter information meets a preset switching condition, switching a control mode of the PFC circuit to be a continuous conduction mode (CCM).

Description

功率因数校正PFC电路的控制方法、装置、设备及介质Control method, device, device and medium for power factor correction PFC circuit
本申请要求在2017年12月29日提交中国专利局、申请号为201711489322.7、申请名称为“一种功率因数校正电路的控制方法以及装置”、在2018年09月07日提交中国专利局、申请号为201811046050.8、申请名称为“功率因数校正PFC电路的控制方法、装置、设备及介质”和在2018年10月17日提交中国专利局、申请号为201811209229.0、申请名称为“功率因数校正PFC电路的控制方法、装置、设备及介质”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application is required to be submitted to the China Patent Office on December 29, 2017, application number 201711489322.7, the application name is "a control method and device for a power factor correction circuit", submitted to the Chinese Patent Office on September 7, 2018, and applied for No. 201811046050.8, the application name is "control method, device, equipment and medium for power factor correction PFC circuit" and submitted to China Patent Office on October 17, 2018, application number is 201811209229.0, and the application name is "power factor correction PFC circuit". The priority of the Chinese Patent Application, the entire disclosure of which is incorporated herein by reference.
技术领域Technical field
本发明涉及控制技术领域,尤其涉及一种功率因数校正PFC电路的控制方法、装置、设备及介质。The present invention relates to the field of control technologies, and in particular, to a method, device, device and medium for controlling a power factor correction PFC circuit.
背景技术Background technique
为了保证功率因数校正(Power Factor Correction,PFC)电路(具体为图腾柱PFC电路)的高效性,业内通常要求PFC电路工作在临界导通模式(Critical-Conduction Mode,CRM)或者三角波电流模式(Triangular Current Mode,TCM)下。但是,在这种情况下,当PFC电路的输出电压和输入电压比较接近时,流过PFC电路中电感上的电流可能无法降低到零或者很长时间才能降低到零(或者固定负值),这就使得PFC电路无法进行下一周期的正常驱动,进而可能会导致整个PFC电路的不稳定,甚至会影响整个PFC电路的正常工作。In order to ensure the efficiency of Power Factor Correction (PFC) circuits (specifically totem pole PFC circuits), the industry generally requires PFC circuits to operate in Critical-Conduction Mode (CRM) or Triangular Current Mode (Triangular). Under Current Mode, TCM). However, in this case, when the output voltage of the PFC circuit is close to the input voltage, the current flowing through the inductor in the PFC circuit may not be reduced to zero or for a long time to be reduced to zero (or a fixed negative value). This makes the PFC circuit unable to perform the normal driving of the next cycle, which may cause instability of the entire PFC circuit and even affect the normal operation of the entire PFC circuit.
目前,业内通常可采用下述两种方式解决上述问题:Currently, the industry can usually solve the above problems in the following two ways:
第一种,提升PFC电路中母线电容的耐压等级,使得PFC电路的输出电压和输入电压之间的差值被拉大。但是,电容耐压等级提高以后,同样体积的电容容量就会大大下降,从而降低功率密度或者其他电性能指标,而且这种方式可能会导致实现成本较高的问题。The first type is to increase the withstand voltage level of the bus capacitor in the PFC circuit, so that the difference between the output voltage of the PFC circuit and the input voltage is widened. However, after the capacitor withstand voltage level is increased, the same volume of capacitance will be greatly reduced, thereby reducing power density or other electrical performance indicators, and this approach may lead to higher cost of implementation.
第二种,降低PFC电路中电感上的峰值电流给定值(或者降低导通时间Ton),使得流过电感的电流能够快速下降到零,以加快进入下一开关周期的速度。但是,强行改变电流峰值给定(或者导通时间Ton),会 使得输入电流波形变为非正弦波形,进而可能会导致PFC电路的总谐波失真(Total Harmonic Distortion,THD)较严重的问题。Second, reduce the peak current reference on the inductor in the PFC circuit (or reduce the on-time Ton) so that the current flowing through the inductor can quickly drop to zero to speed up the next switching cycle. However, forcibly changing the current peak reference (or on-time Ton) will cause the input current waveform to become a non-sinusoidal waveform, which may cause a serious problem of total harmonic distortion (THD) of the PFC circuit.
也就是说,现有的PFC电路的控制方法存在实现成本较高以及THD较严重的问题。That is to say, the control method of the existing PFC circuit has a problem of high implementation cost and serious THD.
发明内容Summary of the invention
本发明实施例提供了一种功率因数校正PFC电路的控制方法、装置、设备及介质,用以解决现有的PFC电路的控制方法所存在的实现成本较高以及THD较严重的问题。The embodiment of the invention provides a method, a device, a device and a medium for controlling a power factor correction PFC circuit, which are used to solve the problems of high implementation cost and serious THD of the existing PFC circuit control method.
第一方面,本发明实施例提供一种功率因数校正PFC电路的控制方法,包括:In a first aspect, an embodiment of the present invention provides a method for controlling a power factor correction PFC circuit, including:
获取PFC电路的电路参数信息;Obtaining circuit parameter information of the PFC circuit;
在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式(Continuous Current Mode,CCM)。When it is determined that the circuit parameter information satisfies the preset switching condition, the control mode of the PFC circuit is switched to a continuous current mode (CCM).
在一种可能的实施方式中,本发明上述实施例提供的方法中,在将PFC电路的控制模式切换为CCM之后,方法还包括:In a possible implementation manner, in the method provided by the foregoing embodiment of the present invention, after switching the control mode of the PFC circuit to the CCM, the method further includes:
在确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为三角波电流模式TCM或者临界导通模式CRM。When it is determined that the circuit parameter information does not satisfy the preset switching condition, the control mode of the PFC circuit is switched to the triangular wave current mode TCM or the critical conduction mode CRM.
在一种可能的实施方式中,本发明上述实施例提供的方法中,电路参数信息包括以下一种或多种:电压信息、工作频率以及发波周期。In a possible implementation manner, in the method provided by the foregoing embodiment, the circuit parameter information includes one or more of the following: voltage information, an operating frequency, and a wave period.
在一种可能的实施方式中,本发明上述实施例提供的方法中,电路参数信息包括电压信息时,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM,包括:In a possible implementation manner, in the method provided by the foregoing embodiment, when the circuit parameter information includes the voltage information, when the determining that the circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to continuous conduction. Mode CCM, including:
在电压信息满足以下条件中的一个或多个时,确定电压信息满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM:When the voltage information satisfies one or more of the following conditions, determining that the voltage information satisfies the preset switching condition, switching the control mode of the PFC circuit to the continuous conduction mode CCM:
PFC电路的输入电压瞬时值的最大值大于预设最大阈值、PFC电路的输入电压在设定周期内的有效值大于预设有效阈值、PFC电路的输入电压在设定周期内的平均值大于预设平均阈值、以及PFC电路的输出电压和输入电压的差值小于预设差值阈值。The maximum value of the instantaneous value of the input voltage of the PFC circuit is greater than the preset maximum threshold, the effective value of the input voltage of the PFC circuit in the set period is greater than the preset effective threshold, and the average value of the input voltage of the PFC circuit in the set period is greater than the pre- The average threshold and the difference between the output voltage of the PFC circuit and the input voltage are set to be less than a preset difference threshold.
在一种可能的实施方式中,本发明上述实施例提供的方法中,电路 参数信息包括工作频率时,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM,包括:In a possible implementation manner, in the method provided by the foregoing embodiment, when the circuit parameter information includes the operating frequency, when the determining that the circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to continuous conduction. Mode CCM, including:
在PFC电路的工作频率小于预设频率阈值时,确定工作频率满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM。When the operating frequency of the PFC circuit is less than the preset frequency threshold, determining that the operating frequency meets the preset switching condition, switching the control mode of the PFC circuit to the continuous conduction mode CCM.
在一种可能的实施方式中,本发明上述实施例提供的方法中,电路参数信息包括发波周期时,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM,包括:In a possible implementation manner, in the method provided by the foregoing embodiment, when the circuit parameter information includes a wave period, when the determining circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to a continuous guide. Pass mode CCM, including:
在PFC电路的发波周期大于预设时长时,确定发波周期满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM。When the wave period of the PFC circuit is greater than the preset duration, it is determined that the wave period satisfies the preset switching condition, and the control mode of the PFC circuit is switched to the continuous conduction mode CCM.
第二方面,本发明实施例提供一种功率因数校正PFC电路的控制装置,包括:In a second aspect, an embodiment of the present invention provides a control device for a power factor correction PFC circuit, including:
获取单元,用于获取PFC电路的电路参数信息;An acquiring unit, configured to acquire circuit parameter information of the PFC circuit;
切换单元,用于在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM。And a switching unit, configured to switch the control mode of the PFC circuit to the continuous conduction mode CCM when determining that the circuit parameter information satisfies the preset switching condition.
在一种可能的实施方式中,本发明上述实施例提供的装置中,切换单元,还用于:在将PFC电路的控制模式切换为CCM之后,确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为三角波电流模式TCM或者临界导通模式CRM。In a possible implementation manner, in the apparatus provided by the foregoing embodiment, the switching unit is further configured to: after determining that the circuit parameter information does not satisfy the preset switching condition after switching the control mode of the PFC circuit to the CCM, The control mode of the PFC circuit is switched to a triangular wave current mode TCM or a critical conduction mode CRM.
在一种可能的实施方式中,本发明上述实施例提供的装置中,电路参数信息包括以下一种或多种:电压信息、工作频率以及发波周期。In a possible implementation manner, in the apparatus provided by the foregoing embodiment, the circuit parameter information includes one or more of the following: voltage information, an operating frequency, and a wave period.
在一种可能的实施方式中,本发明上述实施例提供的装置中,电路参数信息包括电压信息,切换单元具体用于:In a possible implementation manner, in the apparatus provided by the foregoing embodiment, the circuit parameter information includes voltage information, and the switching unit is specifically configured to:
在电压信息满足以下条件中的一个或多个时,确定电压信息满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM:When the voltage information satisfies one or more of the following conditions, determining that the voltage information satisfies the preset switching condition, switching the control mode of the PFC circuit to the continuous conduction mode CCM:
PFC电路的输入电压瞬时值的最大值大于预设最大阈值、PFC电路的输入电压在设定周期内的有效值大于预设有效阈值、PFC电路的输入电压在设定周期内的平均值大于预设平均阈值、以及PFC电路的输出电压和输入电压的差值小于预设差值阈值。The maximum value of the instantaneous value of the input voltage of the PFC circuit is greater than the preset maximum threshold, the effective value of the input voltage of the PFC circuit in the set period is greater than the preset effective threshold, and the average value of the input voltage of the PFC circuit in the set period is greater than the pre- The average threshold and the difference between the output voltage of the PFC circuit and the input voltage are set to be less than a preset difference threshold.
在一种可能的实施方式中,本发明上述实施例提供的装置中,电路参数信息包括工作频率,切换单元具体用于:In a possible implementation manner, in the apparatus provided by the foregoing embodiment, the circuit parameter information includes an operating frequency, and the switching unit is specifically configured to:
在PFC电路的工作频率小于预设频率阈值时,确定工作频率满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM。When the operating frequency of the PFC circuit is less than the preset frequency threshold, determining that the operating frequency meets the preset switching condition, switching the control mode of the PFC circuit to the continuous conduction mode CCM.
在一种可能的实施方式中,本发明上述实施例提供的装置中,电路参数信息包括发波周期,切换单元具体用于:In a possible implementation manner, in the apparatus provided by the foregoing embodiment, the circuit parameter information includes a wave sending period, and the switching unit is specifically configured to:
在PFC电路的发波周期大于预设时长时,确定发波周期满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM。When the wave period of the PFC circuit is greater than the preset duration, it is determined that the wave period satisfies the preset switching condition, and the control mode of the PFC circuit is switched to the continuous conduction mode CCM.
第三方面,本发明实施例还提供了一种功率因数校正PFC电路的控制设备,包括存储器以及处理器,其中:In a third aspect, an embodiment of the present invention further provides a control device for a power factor correction PFC circuit, including a memory and a processor, where:
存储器,用于存储程序指令;a memory for storing program instructions;
处理器,用于调用存储器中存储的程序指令,并按照获得的程序执行本发明实施例中第一方面提供的功率因数校正PFC电路的控制方法。And a processor, configured to call a program instruction stored in the memory, and execute a control method of the power factor correction PFC circuit provided by the first aspect of the embodiment of the present invention according to the obtained program.
第四方面,本发明实施例还提供了一种计算机存储介质,计算机存储介质存储有计算机可执行指令,计算机可执行指令用于使计算机执行本发明实施例中第一方面提供的功率因数校正PFC电路的控制方法。In a fourth aspect, an embodiment of the present invention further provides a computer storage medium storing computer executable instructions for causing a computer to execute a power factor correction PFC provided by the first aspect of the embodiments of the present invention. The control method of the circuit.
根据本发明实施例的技术方案,获取PFC电路的电路参数信息之后,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM。相比于现有技术,在本发明实施例中,PFC电路的控制方式可根据电路参数信息的不同而不同,而不是一直维持不变,无需提升母线电容的耐压等级,因而能够降低实现成本;且无需强行改变电流峰值给定(或者改变导通时间Ton),因而能够改善输入电流的THD。According to the technical solution of the embodiment of the present invention, after acquiring the circuit parameter information of the PFC circuit, when determining that the circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to the continuous conduction mode CCM. Compared with the prior art, in the embodiment of the present invention, the control mode of the PFC circuit may be different according to different circuit parameter information, instead of being maintained at all times, without increasing the withstand voltage level of the bus capacitor, thereby reducing the implementation cost. And there is no need to forcibly change the current peak reference (or change the on-time Ton), thus improving the THD of the input current.
另外,本发明实施例的技术方案,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为CCM,能够避免PFC电路工作在CRM或者TCM、且PFC电路的输出电压和输入电压比较接近时,流过PFC电路中电感上的电流可能无法降低到零或者很长时间才能降低到零(或者固定负值)的问题,使得PFC电路下一周期能够正常驱动,保证整个PFC电路的正常工作。In addition, the technical solution of the embodiment of the present invention switches the control mode of the PFC circuit to CCM when determining that the circuit parameter information satisfies the preset switching condition, thereby preventing the PFC circuit from operating at the CRM or TCM and the output voltage and input of the PFC circuit. When the voltage is close, the current flowing through the inductor in the PFC circuit may not be reduced to zero or a long time to reduce to zero (or a fixed negative value), so that the PFC circuit can be driven normally in the next cycle to ensure the entire PFC circuit. The normal work.
本发明的其它特征和优点将在随后的说明书中阐述,并且,部分地从说明书中变得显而易见,或者通过实施本申请而了解。本申请的目的和其他优点可通过在所写的说明书、权利要求书、以及附图中所特别指出的结构来实现和获得。Other features and advantages of the invention will be set forth in the description which follows, The objectives and other advantages of the present invention can be realized and obtained by the structure of the invention.
附图说明DRAWINGS
图1为本发明实施例提供的一种图腾柱PFC电路的电路拓扑的结构示意图;1 is a schematic structural diagram of a circuit topology of a totem pole PFC circuit according to an embodiment of the present invention;
图2为本发明实施例提供的另一图腾柱PFC电路的电路拓扑的结构示意图;2 is a schematic structural diagram of a circuit topology of another totem pole PFC circuit according to an embodiment of the present invention;
图3为本发明实施例提供的功率因数校正PFC电路的控制方法的示意流程图;3 is a schematic flowchart of a method for controlling a power factor correction PFC circuit according to an embodiment of the present invention;
图4为本发明实施例提供的功率因数校正PFC电路的控制装置的结构示意图;4 is a schematic structural diagram of a control device of a power factor correction PFC circuit according to an embodiment of the present invention;
图5为本发明实施例提供的功率因数校正PFC电路的控制设备的结构示意图。FIG. 5 is a schematic structural diagram of a control device of a power factor correction PFC circuit according to an embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图对本申请的实施例进行说明,应当理解,此处所描述的实施例仅用于说明和解释本申请,并不用于限定本申请。The embodiments of the present application are described below with reference to the accompanying drawings, and the embodiments described herein are intended to illustrate and explain the present application.
针对现有的PFC电路的控制方法所存在的实现成本较高以及THD较严重的问题,本发明实施例提供了一种功率因数校正PFC电路的控制方案,本发明实施例提供的PFC电路的控制方案可根据电路参数信息的不同而不同,而不是一直维持不变,无需提升母线电容的耐压等级,因而能够降低实现成本;且,无需强行改变电流峰值给定(或者改变导通时间Ton),因而能够改善输入电流的THD。The present invention provides a control scheme for a power factor correction PFC circuit, and the control of the PFC circuit provided by the embodiment of the present invention is provided for the control method of the existing PFC circuit, which has a high implementation cost and a severe THD. The solution can be different according to the circuit parameter information, instead of always maintaining the same, without increasing the withstand voltage level of the bus capacitor, thus reducing the implementation cost; and, without forcibly changing the current peak reference (or changing the on-time Ton) Therefore, the THD of the input current can be improved.
需要说明的是,本发明实施例提供的功率因数校正PFC电路的控制方案,不仅适用于图腾柱PFC电路拓扑,而且适用于包括图腾柱PFC电路拓扑的电路以及任何形式的图腾柱PFC电路拓扑的变形。It should be noted that the control scheme of the power factor correction PFC circuit provided by the embodiment of the present invention is applicable not only to the totem pole PFC circuit topology, but also to the circuit including the totem pole PFC circuit topology and any form of the totem pole PFC circuit topology. Deformation.
如图1所示,其为本发明实施例提供的一种PFC电路,其包括PFC电感L,由第一高频管S1以及第二高频管S2串联而成的第一支路、由第一工频管Q1以及第二工频管Q2串联而成的第二支路,第一支路与第二支路相互并联,并联后的一端连接母线电容C的一端以及负载电阻R的一端,并联后的另一端连接母线电容C的另一端以及负载电阻R的另一端。As shown in FIG. 1 , it is a PFC circuit provided by an embodiment of the present invention, which includes a PFC inductor L, and a first branch formed by connecting a first high frequency tube S1 and a second high frequency tube S2 in series. a second branch formed by connecting a power frequency tube Q1 and a second power frequency tube Q2 in series, the first branch and the second branch are connected in parallel with each other, and one end connected in parallel is connected to one end of the bus capacitor C and one end of the load resistor R, The other end connected in parallel is connected to the other end of the bus capacitor C and the other end of the load resistor R.
其中,图腾柱PFC电路中的高频管通常采用低反向恢复性能的金属- 氧化物半导体场效应晶体管(Metal-Oxide-Semiconductor Field-Effect Transistor,MOSFET),通常可为相应的氮化镓(GaN)管。当然,本发明其它实施例中高频管还可为其它开关管,例如碳化硅(SiC)管或者绝缘栅双极型晶体管(Insulated Gate Bipolar Transistor,)IGBT等,只要能够实现低反向恢复的功能即可,对此不做任何限定。Among them, the high-frequency tube in the totem pole PFC circuit usually uses a low-recovery-recovery Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), which can usually be the corresponding gallium nitride ( GaN) tube. Of course, in other embodiments of the present invention, the high frequency tube may be other switching tubes, such as a silicon carbide (SiC) tube or an insulated gate bipolar transistor (IGBT), as long as low reverse recovery can be realized. Yes, there is no limit to this.
如图2所示,其为本发明实施例提供的另一PFC电路,其将图1的第二支路中的第一工频管Q1以及第二工频管Q2均替换为二极管,如图2中所示的D1以及D2。As shown in FIG. 2, it is another PFC circuit provided by the embodiment of the present invention, which replaces the first power frequency tube Q1 and the second power frequency tube Q2 in the second branch of FIG. 1 with diodes, as shown in FIG. D1 and D2 shown in 2.
下面结合附图,对本发明实施例提供的功率因数校正PFC电路的控制方法、装置、设备及介质进行详细说明。The control method, device, device and medium of the power factor correction PFC circuit provided by the embodiment of the present invention are described in detail below with reference to the accompanying drawings.
本发明实施例提供的一种功率因数校正PFC电路的控制方法,如图3所示,其步骤可以包括:A method for controlling a power factor correction PFC circuit according to an embodiment of the present invention is as shown in FIG. 3, and the steps thereof may include:
步骤301,获取PFC电路的电路参数信息。Step 301: Acquire circuit parameter information of the PFC circuit.
其中,电路参数信息是电路中各个器件的参数和各个节点的参数的统称,其具体可以包括电路中各个器件的参数,例如,电路中电阻的阻值、电路中电感的电感值、电感的工作电压、二极管的导通电压、以及开关管的工作频率等;也可以包括电路中各个节点的测量值,例如,电路中某节点的电压值和电流值、电路中任意两个节点之间的电压差等。Wherein, the circuit parameter information is a general term for the parameters of each device in the circuit and the parameters of each node, and the specific parameters thereof may include parameters of each device in the circuit, for example, the resistance value of the resistor in the circuit, the inductance value of the inductance in the circuit, and the operation of the inductor. Voltage, diode turn-on voltage, and operating frequency of the switch; etc.; may also include measurements of various nodes in the circuit, for example, voltage and current values of a node in the circuit, voltage between any two nodes in the circuit Poor and so on.
本步骤中,PFC电路的电路参数信息,可以包括但不限于:电压信息、工作频率和发波周期。其中,电压信息又可以包括输入电压、输出电压与输入电压的电压差等。当然,本发明其它实施例中,电路参数信息还可以包括其它信息,本发明实施例对此不做限定。In this step, the circuit parameter information of the PFC circuit may include, but is not limited to, voltage information, operating frequency, and wave period. The voltage information may further include an input voltage, a voltage difference between the output voltage and the input voltage, and the like. Of course, in other embodiments of the present invention, the circuit parameter information may further include other information, which is not limited by the embodiment of the present invention.
具体实施时,获取PFC电路的电路参数信息,可以通过计算和/或测量进行获取,具体获取电路参数信息时,可以周期性获取,也可以实时获取,本发明实施例对此不做限定。In the specific implementation, the circuit parameter information of the PFC circuit can be obtained by calculation and/or measurement. When the circuit parameter information is obtained, the circuit parameter information can be obtained periodically or in real time.
步骤302,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM。Step 302: When it is determined that the circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to the continuous conduction mode CCM.
具体实施时,由于CCM控制方式下,即使PFC电路的输出电压和输入电压之间的差值较小,在设定开关周期到来时,也能够实现下一开关周期的正常驱动,因此,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为CCM,以避免PFC电路工作在CRM或者TCM、且PFC电路的输出电压和输入电压比较接近时,流过PFC电路中 电感上的电流可能无法降低到零或者很长时间才能降低到零(或者固定负值)的问题,使得PFC电路下一周期能够正常驱动,保证整个PFC电路的正常工作。In the specific implementation, according to the CCM control mode, even if the difference between the output voltage and the input voltage of the PFC circuit is small, when the set switching period comes, the normal driving of the next switching cycle can be realized, and therefore, the determination is made. When the circuit parameter information satisfies the preset switching condition, the control mode of the PFC circuit is switched to CCM to prevent the PFC circuit from operating in the CRM or TCM, and the output voltage and the input voltage of the PFC circuit are relatively close, and the inductor flows through the PFC circuit. The current may not be reduced to zero or for a long time to reduce to zero (or a fixed negative value), so that the PFC circuit can be driven normally in the next cycle to ensure the normal operation of the entire PFC circuit.
其中,CCM控制方式,可以为定频平均值电流控制,也可以是变频变环宽滞环控制,还可以为变频定环宽滞环控制,还可以为峰值电流控制等,本发明实施例对此不做限定。The CCM control mode may be a constant frequency average current control, or may be a variable frequency variable loop hysteresis loop control, or may be a variable loop fixed loop hysteresis loop control, or may be a peak current control or the like, which is in the embodiment of the present invention. This is not limited.
实际应用中,在控制方式的切换过程中,还可加入适当的滞环策略,以保证PFC电路的安全性和稳定性。具体来说,在切换控制方式时,可以在满足预设切换条件后立即切换控制方式,也可以等待一定时长在预定时刻切换控制方式,例如,在满足预设切换条件后暂不进行切换,等到交流电压过零时刻切换控制方式,以降低电流较大时切换控制方式对系统造成的冲击。In practical applications, an appropriate hysteresis strategy can be added during the switching of the control mode to ensure the safety and stability of the PFC circuit. Specifically, when the control mode is switched, the control mode may be switched immediately after the preset switching condition is met, or the control mode may be switched at a predetermined time after waiting for a certain period of time, for example, after the preset switching condition is met, the switching is temporarily not performed. When the AC voltage crosses zero, the control mode is switched to reduce the impact of the switching control mode on the system when the current is large.
在一种可能的实施方式中,为了保证PFC电路的高效性,在将PFC电路的控制模式切换为CCM之后,在确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为TCM或者CRM。In a possible implementation manner, in order to ensure the high efficiency of the PFC circuit, after switching the control mode of the PFC circuit to the CCM, when determining that the circuit parameter information does not satisfy the preset switching condition, the control mode of the PFC circuit is switched to TCM or CRM.
换句话说,具体实施时,可以在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM,并在确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为TCM或者CRM,能够使得PFC电路最大程度的工作在TCM或者CRM下,当TCM或者CRM无法正常工作时切换到CCM,如此以来,既能够充分利用TCM或者CRM效率高的优点,又能够充分发挥了CCM在高压下可以工作并实现较好THD的特点,从而使得整个PFC电路在高压重载下既实现高效率,也可以获得较好的THD。In other words, when the circuit parameter information is determined to meet the preset switching condition, the control mode of the PFC circuit is switched to the continuous conduction mode CCM, and when it is determined that the circuit parameter information does not satisfy the preset switching condition, The control mode of the PFC circuit is switched to TCM or CRM, which enables the PFC circuit to work under the TCM or CRM to the maximum extent. When the TCM or CRM cannot work normally, it switches to the CCM. Thus, the TCM or CRM can be fully utilized. The advantages can fully exert the characteristics that CCM can work under high pressure and achieve better THD, so that the whole PFC circuit can achieve high efficiency and good THD under high pressure and heavy load.
下面以电路参数信息分别为电压信息、工作频率以及发波周期为例,对本发明实施例中的预设切换条件进行详细说明。The preset switching conditions in the embodiment of the present invention are described in detail below by taking the circuit parameter information as the voltage information, the operating frequency, and the wave period.
在一种可能的实施方式中,电路参数信息为电压信息,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为CCM,包括:在电压信息满足以下条件中的一个或多个时,确定电压信息满足预设切换条件,将PFC电路的控制模式切换为CCM:PFC电路的输入电压瞬时值的最大值大于预设最大阈值、PFC电路的输入电压在设定周期内的有效值大于预设有效阈值、PFC电路的输入电压在设定周期内的平均值大于预设平均阈值、以及PFC电路的输出电压和输入电压的差值小于预设差 值阈值。In a possible implementation manner, the circuit parameter information is voltage information, and when determining that the circuit parameter information meets the preset switching condition, switching the control mode of the PFC circuit to the CCM includes: the voltage information meets one of the following conditions or When multiple times, it is determined that the voltage information satisfies the preset switching condition, and the control mode of the PFC circuit is switched to CCM: the maximum value of the input voltage instantaneous value of the PFC circuit is greater than the preset maximum threshold, and the input voltage of the PFC circuit is within the set period. The effective value is greater than the preset effective threshold, the average value of the input voltage of the PFC circuit in the set period is greater than the preset average threshold, and the difference between the output voltage of the PFC circuit and the input voltage is less than the preset difference threshold.
PFC电路的输入电压瞬时值的最大值大于预设最大阈值时,预设最大阈值可根据实际情况灵活设定,如可设置为380V、390V等,只要满足实际的需求即可,本发明实施例对此不作任何限定。When the maximum value of the instantaneous value of the input voltage of the PFC circuit is greater than the preset maximum threshold, the preset maximum threshold can be flexibly set according to the actual situation, for example, it can be set to 380V, 390V, etc., as long as the actual requirements are met, the embodiment of the present invention There is no limit to this.
在一个示例中,假设预设最大阈值为380V,输入电压瞬时值的最大值为400V,则可确定电压信息满足预设切换条件,因而可将PFC电路的控制方式切换为CCM。In one example, assuming that the preset maximum threshold is 380V and the maximum value of the input voltage instantaneous value is 400V, it can be determined that the voltage information satisfies the preset switching condition, and thus the control mode of the PFC circuit can be switched to the CCM.
在另一示例中,假设预设最大阈值为380V,输入电压瞬时值的最大值为360V,则可确定电压信息不满足预设切换条件,因而将PFC电路的控制方式切换为CRM或者TCM。In another example, assuming that the preset maximum threshold is 380V and the maximum value of the input voltage instantaneous value is 360V, it can be determined that the voltage information does not satisfy the preset switching condition, and thus the control mode of the PFC circuit is switched to CRM or TCM.
PFC电路的输入电压在设定周期(T1)内的有效值大于预设有效阈值时,设定周期(T1)可根据实际情况灵活设定,如可设置为1h(小时)、1min(分钟)或者1s(秒)等,本发明实施例对此不作任何限定。When the effective value of the input voltage of the PFC circuit in the set period (T1) is greater than the preset effective threshold, the set period (T1) can be flexibly set according to the actual situation, such as 1h (hours), 1 minute (minutes). Or 1 s (seconds), etc., the embodiment of the present invention does not limit this.
需要说明的是,预设有效阈值可根据实际情况灵活设定,如可设置为270V、290V等,只要满足实际的需求即可,本发明实施例对此不作任何限定。It should be noted that the preset effective threshold can be flexibly set according to the actual situation, for example, it can be set to 270V, 290V, etc., as long as the actual requirements are met, the embodiment of the present invention does not limit this.
在一个示例中,假设预设有效阈值为270V,输入电压的有效值为300V,则可确定电压信息满足预设切换条件,因而可将PFC电路的控制方式切换为CCM。In one example, assuming that the preset effective threshold is 270V and the effective value of the input voltage is 300V, it can be determined that the voltage information satisfies the preset switching condition, and thus the control mode of the PFC circuit can be switched to the CCM.
在另一示例中,假设预设有效阈值为270V,输入电压的有效值为250V,则可确定电压信息不满足预设切换条件,因而将PFC电路的控制方式切换为CRM或者TCM。In another example, assuming that the preset effective threshold is 270V and the effective value of the input voltage is 250V, it can be determined that the voltage information does not satisfy the preset switching condition, and thus the control mode of the PFC circuit is switched to CRM or TCM.
PFC电路的输入电压在设定周期(T2)内的平均值大于预设平均阈值时,设定周期(T2)可根据实际情况灵活设定,如可设置为1h(小时)、1min(分钟)或者1s(秒)等,设定周期(T2)和设定周期(T1)可设置为相同或者不同,本发明实施例对此不作任何限定。When the average value of the input voltage of the PFC circuit in the set period (T2) is greater than the preset average threshold, the set period (T2) can be flexibly set according to the actual situation, such as 1h (hours), 1 minute (minutes). Alternatively, the setting period (T2) and the setting period (T1) may be set to be the same or different, and the embodiment of the present invention does not limit this.
需要说明的是,预设平均阈值可根据实际情况灵活设定,如可设置为250V、270V等,只要满足实际的需求即可,本发明实施例对此不作任何限定。It should be noted that the preset average threshold value can be flexibly set according to the actual situation, for example, it can be set to 250V, 270V, etc., as long as the actual requirements are met, the embodiment of the present invention does not limit this.
在一个示例中,假设预设平均阈值为250V,输入电压的平均值为270V,则可确定电压信息满足预设切换条件,因而可将PFC电路的控制 方式切换为CCM。In one example, assuming that the preset average threshold is 250V and the average value of the input voltage is 270V, it can be determined that the voltage information satisfies the preset switching condition, and thus the control mode of the PFC circuit can be switched to the CCM.
再例如,假设预设平均阈值为250V,输入电压的平均值为230V,则可确定电压信息不满足预设切换条件,因而可将PFC电路的控制方式切换为CRM或者TCM。For example, if the preset average threshold is 250V and the average value of the input voltage is 230V, it can be determined that the voltage information does not satisfy the preset switching condition, and thus the control mode of the PFC circuit can be switched to CRM or TCM.
PFC电路的输出电压和输入电压的差值小于预设差值阈值时,PFC电路的输出电压和输入电压的差值通常可为PFC电路的输出电压和输入电压的差值△V的瞬时值。When the difference between the output voltage and the input voltage of the PFC circuit is less than the preset difference threshold, the difference between the output voltage of the PFC circuit and the input voltage may generally be the instantaneous value of the difference ΔV between the output voltage of the PFC circuit and the input voltage.
其中,预设差值阈值可根据实际情况灵活设定,如可设置为10V、20V等,只要满足实际的需求即可,本发明实施例对此不作任何限定。The preset difference threshold may be flexibly set according to the actual situation, for example, it may be set to 10V, 20V, etc., as long as the actual requirements are met, the embodiment of the present invention does not limit this.
在一个示例中,假设预设差值阈值为30V,输入电压Vin为400V,输出电压Vout为420V,即输出电压和输入电压的差值为20V,则可确定电压信息满足预设切换条件,因而可将PFC电路的控制方式切换为CCM。In one example, assuming that the preset difference threshold is 30V, the input voltage Vin is 400V, and the output voltage Vout is 420V, that is, the difference between the output voltage and the input voltage is 20V, it can be determined that the voltage information satisfies the preset switching condition, and thus The control mode of the PFC circuit can be switched to CCM.
在另一示例中,假设预设差值阈值为30V,输入电压Vin为380V,输出电压Vout为420V,即输出电压和输入电压的差值为40V,则可确定电压信息不满足预设切换条件,因而可将PFC电路的控制方式切换为CRM或者TCM。In another example, assuming that the preset difference threshold is 30V, the input voltage Vin is 380V, and the output voltage Vout is 420V, that is, the difference between the output voltage and the input voltage is 40V, it can be determined that the voltage information does not satisfy the preset switching condition. Therefore, the control mode of the PFC circuit can be switched to CRM or TCM.
在一种可能的实施方式中,电路参数信息为工作频率,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为CCM,包括:在PFC电路的工作频率小于预设频率阈值时,确定工作频率满足预设切换条件,将PFC电路的控制模式切换为CCM。In a possible implementation manner, the circuit parameter information is an operating frequency, and when the determining that the circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to the CCM, including: the operating frequency of the PFC circuit is less than the preset frequency. At the threshold, it is determined that the operating frequency satisfies the preset switching condition, and the control mode of the PFC circuit is switched to the CCM.
其中,预设频率阈值可以根据实际情况灵活设定,如可设置为15千赫兹(KHz)、20KHz等,只要满足实际的需求即可,本发明实施例对此不作任何限定。The preset frequency threshold can be flexibly set according to the actual situation, for example, it can be set to 15 kHz (KHz), 20 kHz, etc., as long as the actual requirements are met, the embodiment of the present invention does not limit this.
在一个示例中,假设预设频率阈值为20KHz,PFC电路当前的工作频率为15KHz,则可确定工作频率满足预设切换条件,因而可将PFC电路的控制方式切换为CCM。In one example, assuming that the preset frequency threshold is 20 kHz and the current operating frequency of the PFC circuit is 15 kHz, it can be determined that the operating frequency satisfies the preset switching condition, and thus the control mode of the PFC circuit can be switched to CCM.
在另一示例中,假设预设频率阈值为20KHz,PFC电路当前的工作频率为25KHz,则可确定电压信息不满足预设切换条件,因而可将PFC电路的控制方式切换为CRM或者TCM。In another example, assuming that the preset frequency threshold is 20 kHz and the current operating frequency of the PFC circuit is 25 kHz, it can be determined that the voltage information does not satisfy the preset switching condition, and thus the control mode of the PFC circuit can be switched to CRM or TCM.
在一种可能的实施方式中,电路参数信息为发波周期,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为CCM,包 括:在PFC电路的发波周期大于预设时长时,确定发波周期满足预设切换条件,将PFC电路的控制模式切换为CCM。In a possible implementation manner, the circuit parameter information is a wave period, and when the determining that the circuit parameter information meets the preset switching condition, the control mode of the PFC circuit is switched to the CCM, including: the wave period in the PFC circuit is greater than the pre- When the duration is set, it is determined that the wave-forming period satisfies the preset switching condition, and the control mode of the PFC circuit is switched to the CCM.
其中,预设时长可以根据实际情况灵活设定,如可设置为50微秒(μs)、60μs等,只要满足实际的需求即可,本发明实施例对此不作任何限定。The preset duration can be flexibly set according to the actual situation, for example, it can be set to 50 microseconds (μs), 60 μs, etc., as long as the actual requirements are met, and the embodiment of the present invention does not limit this.
在一个示例中,假设预设时长为50μs,PFC电路当前的发波周期为60μs,则可确定工作频率满足预设切换条件,因而可将PFC电路的控制方式切换为CCM。In one example, assuming that the preset duration is 50 μs and the current firing period of the PFC circuit is 60 μs, it can be determined that the operating frequency satisfies the preset switching condition, and thus the control mode of the PFC circuit can be switched to CCM.
在另一示例中,假设预设时长为50μs,PFC电路当前的发波周期为40μs,则可确定电压信息不满足预设切换条件,因而可将PFC电路的控制方式切换为CRM或者TCM。In another example, assuming that the preset duration is 50 μs and the current wave period of the PFC circuit is 40 μs, it can be determined that the voltage information does not satisfy the preset switching condition, and thus the control mode of the PFC circuit can be switched to CRM or TCM.
基于相同的发明构思,本发明实施例还提供一种功率因数校正PFC电路的控制装置。Based on the same inventive concept, an embodiment of the present invention further provides a control device for a power factor correction PFC circuit.
如图4所示,本发明实施例提供的功率因数校正PFC电路的控制装置,包括:As shown in FIG. 4, the control device of the power factor correction PFC circuit provided by the embodiment of the present invention includes:
获取单元402,用于获取PFC电路的电路参数信息。The obtaining unit 402 is configured to acquire circuit parameter information of the PFC circuit.
切换单元404,用于在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM。The switching unit 404 is configured to switch the control mode of the PFC circuit to the continuous conduction mode CCM when determining that the circuit parameter information satisfies the preset switching condition.
本发明实施例提供的功率因数校正PFC电路的控制装置,获取PFC电路的电路参数信息之后,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM,并在确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为三角波电流模式TCM或者临界导通模式CRM。相比于现有技术,在本发明实施例中,PFC电路的控制方式可根据电路参数信息的不同而不同,而不是一直维持不变,无需提升母线电容的耐压等级,因而能够降低实现成本;且无需强行改变电流峰值给定(或者改变导通时间Ton),因而能够改善输入电流的THD。The control device of the power factor correction PFC circuit provided by the embodiment of the present invention, after acquiring the circuit parameter information of the PFC circuit, switches the control mode of the PFC circuit to the continuous conduction mode CCM when determining that the circuit parameter information satisfies the preset switching condition. And when it is determined that the circuit parameter information does not satisfy the preset switching condition, the control mode of the PFC circuit is switched to the triangular wave current mode TCM or the critical conduction mode CRM. Compared with the prior art, in the embodiment of the present invention, the control mode of the PFC circuit may be different according to different circuit parameter information, instead of being maintained at all times, without increasing the withstand voltage level of the bus capacitor, thereby reducing the implementation cost. And there is no need to forcibly change the current peak reference (or change the on-time Ton), thus improving the THD of the input current.
另外,本发明实施例提供的功率因数校正PFC电路的控制装置,在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为CCM,能够避免PFC电路工作在CRM或者TCM、且PFC电路的输出电压和输入电压比较接近时,流过PFC电路中电感上的电流可能无法降低到零或者很长时间才能降低到零(或者固定负值)的问题,使得PFC电 路下一周期能够正常驱动,保证整个PFC电路的正常工作。In addition, the control device of the power factor correction PFC circuit provided by the embodiment of the present invention switches the control mode of the PFC circuit to CCM when determining that the circuit parameter information satisfies the preset switching condition, thereby preventing the PFC circuit from operating in the CRM or TCM, and When the output voltage of the PFC circuit is close to the input voltage, the current flowing through the inductor in the PFC circuit may not be reduced to zero or for a long time to reduce to zero (or a fixed negative value), so that the next cycle of the PFC circuit can Normal drive ensures the normal operation of the entire PFC circuit.
在一种可能的实施方式中,切换单元404,还用于:在将PFC电路的控制模式切换为CCM之后,确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为三角波电流模式TCM或者临界导通模式CRM。In a possible implementation, the switching unit 404 is further configured to switch the control mode of the PFC circuit to a triangular wave after determining that the circuit parameter information does not satisfy the preset switching condition after switching the control mode of the PFC circuit to the CCM. Current mode TCM or critical conduction mode CRM.
本发明实施例提供的功率因数校正PFC电路的控制装置,可以在确定电路参数信息满足预设切换条件时,将PFC电路的控制模式切换为连续导通模式CCM,并在确定电路参数信息不满足预设切换条件时,将PFC电路的控制模式切换为TCM或者CRM,能够使得PFC电路最大程度的工作在TCM或者CRM下,当TCM或者CRM无法正常工作时切换到CCM,如此以来,既能够充分利用TCM或者CRM效率高的优点,又能够充分发挥了CCM在高压下可以工作并实现较好THD的特点,从而使得整个PFC电路在高压重载下既实现高效率,也可以获得较好的THD。The control device of the power factor correction PFC circuit provided by the embodiment of the present invention can switch the control mode of the PFC circuit to the continuous conduction mode CCM when determining that the circuit parameter information satisfies the preset switching condition, and does not satisfy the determination of the circuit parameter information. When the switching condition is preset, the control mode of the PFC circuit is switched to TCM or CRM, which can make the PFC circuit work under the TCM or CRM to the maximum extent, and switch to the CCM when the TCM or CRM cannot work normally, so that it can fully By utilizing the advantages of high efficiency of TCM or CRM, the CCM can work under high pressure and achieve better THD characteristics, so that the entire PFC circuit can achieve high efficiency under high pressure and heavy load, and can also obtain better THD. .
在一种可能的实施方式中,电路参数信息包括以下一种或多种:电压信息、工作频率以及发波周期。In a possible implementation manner, the circuit parameter information includes one or more of the following: voltage information, an operating frequency, and a wave period.
在一种可能的实施方式中,电路参数信息包括电压信息,切换单元404具体用于:在电压信息满足以下条件中的一个或多个时,确定电压信息满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM:PFC电路的输入电压瞬时值的最大值大于预设最大阈值、PFC电路的输入电压在设定周期内的有效值大于预设有效阈值、PFC电路的输入电压在设定周期内的平均值大于预设平均阈值、以及PFC电路的输出电压和输入电压的差值小于预设差值阈值。In a possible implementation manner, the circuit parameter information includes voltage information, and the switching unit 404 is specifically configured to: when the voltage information meets one or more of the following conditions, determine that the voltage information meets a preset switching condition, and the PFC circuit The control mode is switched to the continuous conduction mode CCM: the maximum value of the input voltage instantaneous value of the PFC circuit is greater than the preset maximum threshold, the effective value of the input voltage of the PFC circuit in the set period is greater than the preset effective threshold, and the input voltage of the PFC circuit The average value in the set period is greater than the preset average threshold, and the difference between the output voltage and the input voltage of the PFC circuit is less than the preset difference threshold.
在一种可能的实施方式中,电路参数信息包括工作频率,切换单元404具体用于:在PFC电路的工作频率小于预设频率阈值时,确定工作频率满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM。In a possible implementation manner, the circuit parameter information includes an operating frequency, and the switching unit 404 is specifically configured to: when the operating frequency of the PFC circuit is less than the preset frequency threshold, determine that the working frequency meets the preset switching condition, and control the PFC circuit. The mode is switched to the continuous conduction mode CCM.
在一种可能的实施方式中,电路参数信息包括发波周期,切换单元404具体用于:在PFC电路的发波周期大于预设时长时,确定发波周期满足预设切换条件,将PFC电路的控制模式切换为连续导通模式CCM。In a possible implementation manner, the circuit parameter information includes a wave period, and the switching unit 404 is specifically configured to: when the wave period of the PFC circuit is greater than a preset duration, determine that the wave period meets a preset switching condition, and the PFC circuit The control mode is switched to the continuous conduction mode CCM.
另外,结合图1-图4描述的本发明实施例的功率因数校正PFC电路的控制方法和装置可以由功率因数校正PFC电路的控制设备来实现。图5示出了本发明实施例提供的功率因数校正PFC电路的控制设备的硬件结构示意图。In addition, the control method and apparatus of the power factor correction PFC circuit of the embodiment of the present invention described in conjunction with FIGS. 1 to 4 can be implemented by a control device of the power factor correction PFC circuit. FIG. 5 is a schematic diagram showing the hardware structure of a control device of a power factor correction PFC circuit according to an embodiment of the present invention.
功率因数校正PFC电路的控制设备可以包括处理器501以及存储有计算机程序指令的存储器502。The control device of the power factor correction PFC circuit can include a processor 501 and a memory 502 storing computer program instructions.
具体地,上述处理器501可以包括中央处理器(CPU),或者特定集成电路(Application Specific Integrated Circuit,ASIC),或者可以被配置成实施本发明实施例的一个或多个集成电路。Specifically, the processor 501 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present invention.
存储器502可以包括用于数据或指令的大容量存储器。举例来说而非限制,存储器502可包括硬盘驱动器(Hard Disk Drive,HDD)、软盘驱动器、闪存、光盘、磁光盘、磁带或通用串行总线(Universal Serial Bus,USB)驱动器或者两个或更多个以上这些的组合。在合适的情况下,存储器502可包括可移除或不可移除(或固定)的介质。在合适的情况下,存储器502可在数据处理装置的内部或外部。在特定实施例中,存储器502是非易失性固态存储器。在特定实施例中,存储器502包括只读存储器(ROM)。在合适的情况下,该ROM可以是掩模编程的ROM、可编程ROM(PROM)、可擦除PROM(EPROM)、电可擦除PROM(EEPROM)、电可改写ROM(EAROM)或闪存或者两个或更多个以上这些的组合。Memory 502 can include mass storage for data or instructions. By way of example and not limitation, the memory 502 can include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a Universal Serial Bus (USB) drive, or two or more. A combination of more than one of these. Memory 502 may include removable or non-removable (or fixed) media, where appropriate. Memory 502 may be internal or external to the data processing device, where appropriate. In a particular embodiment, memory 502 is a non-volatile solid state memory. In a particular embodiment, memory 502 includes a read only memory (ROM). Where appropriate, the ROM may be a mask programmed ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM) or flash memory or A combination of two or more of these.
处理器501通过读取并执行存储器502中存储的计算机程序指令,以实现上述实施例中的任意一种功率因数校正PFC电路的控制方法。The processor 501 implements the control method of any one of the power factor correction PFC circuits of the above embodiments by reading and executing computer program instructions stored in the memory 502.
在一个示例中,功率因数校正PFC电路的控制设备还可包括通信接口503和总线510。其中,如图5所示,处理器501、存储器502、通信接口503通过总线510连接并完成相互间的通信。In one example, the control device of the power factor correction PFC circuit may further include a communication interface 503 and a bus 510. As shown in FIG. 5, the processor 501, the memory 502, and the communication interface 503 are connected by the bus 510 and complete communication with each other.
通信接口503,主要用于实现本发明实施例中各模块、装置、单元和/或设备之间的通信。The communication interface 503 is mainly used to implement communication between modules, devices, units and/or devices in the embodiments of the present invention.
总线510包括硬件、软件或两者,将功率因数校正PFC电路的控制设备的部件彼此耦接在一起。举例来说而非限制,总线可包括加速图形端口(AGP)或其他图形总线、增强工业标准架构(EISA)总线、前端总线(FSB)、超传输(HT)互连、工业标准架构(ISA)总线、无限带宽互连、低引脚数(LPC)总线、存储器总线、微信道架构(MCA)总线、外围组件互连(PCI)总线、PCI-Express(PCI-X)总线、串行高级技术附件(SATA)总线、视频电子标准协会局部(VLB)总线或其他合适的总线或者两个或更多个以上这些的组合。在合适的情况下,总线510可包括一个或多个总线。尽管本发明实施例描述和示出了特定的总线,但本发明考虑任何合适的总线或互连。The bus 510 includes hardware, software, or both, and couples the components of the control device of the power factor correction PFC circuit to each other. By way of example and not limitation, the bus may include an accelerated graphics port (AGP) or other graphics bus, an enhanced industry standard architecture (EISA) bus, a front side bus (FSB), a super transfer (HT) interconnect, an industry standard architecture (ISA). Bus, Infinite Bandwidth Interconnect, Low Pin Count (LPC) Bus, Memory Bus, Micro Channel Architecture (MCA) Bus, Peripheral Component Interconnect (PCI) Bus, PCI-Express (PCI-X) Bus, Serial Advanced Technology Attachment (SATA) bus, Video Electronics Standards Association Local (VLB) bus or other suitable bus or a combination of two or more of these. Bus 510 may include one or more buses, where appropriate. Although specific embodiments of the present invention are described and illustrated, the present invention contemplates any suitable bus or interconnect.
该功率因数校正PFC电路的控制设备可以基于获取到PFC电路的电路参数信息,执行本发明实施例中的功率因数校正PFC电路的控制方法,从而实现结合图1-图4描述的功率因数校正PFC电路的控制方法和装置。The control device of the power factor correction PFC circuit may perform the control method of the power factor correction PFC circuit in the embodiment of the present invention based on the circuit parameter information acquired to the PFC circuit, thereby implementing the power factor correction PFC described in connection with FIGS. Circuit control method and device.
另外,结合上述实施例中的功率因数校正PFC电路的控制方法,本发明实施例可提供一种计算机可读存储介质来实现。该计算机可读存储介质上存储有计算机程序指令;该计算机程序指令被处理器执行时实现上述实施例中的任意一种功率因数校正PFC电路的控制方法。In addition, in conjunction with the control method of the power factor correction PFC circuit in the above embodiment, the embodiment of the present invention may be implemented by providing a computer readable storage medium. The computer readable storage medium stores computer program instructions; when the computer program instructions are executed by the processor, the control method of any one of the power factor correction PFC circuits of the above embodiments is implemented.
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型 在内。It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (14)

  1. 一种功率因数校正PFC电路的控制方法,其特征在于,包括:A control method for a power factor correction PFC circuit, comprising:
    获取所述PFC电路的电路参数信息;Obtaining circuit parameter information of the PFC circuit;
    在确定所述电路参数信息满足预设切换条件时,将所述PFC电路的控制模式切换为连续导通模式CCM。When it is determined that the circuit parameter information satisfies a preset switching condition, the control mode of the PFC circuit is switched to the continuous conduction mode CCM.
  2. 根据权利要求1所述的控制方法,其特征在于,在将所述PFC电路的控制模式切换为CCM之后,所述控制方法还包括:The control method according to claim 1, wherein after the switching of the control mode of the PFC circuit to the CCM, the control method further comprises:
    在确定所述电路参数信息不满足所述预设切换条件时,将所述PFC电路的控制模式切换为三角波电流模式TCM或者临界导通模式CRM。When it is determined that the circuit parameter information does not satisfy the preset switching condition, the control mode of the PFC circuit is switched to a triangular wave current mode TCM or a critical conduction mode CRM.
  3. 根据权利要求1所述的控制方法,其特征在于,所述电路参数信息包括以下一种或多种:电压信息、工作频率以及发波周期。The control method according to claim 1, wherein the circuit parameter information comprises one or more of the following: voltage information, an operating frequency, and a wave period.
  4. 根据权利要求3所述的控制方法,其特征在于,所述电路参数信息包括电压信息时,在确定所述电路参数信息满足预设切换条件时将所述PFC电路的控制模式切换为连续导通模式CCM包括:The control method according to claim 3, wherein when the circuit parameter information includes voltage information, switching the control mode of the PFC circuit to continuous conduction when determining that the circuit parameter information satisfies a preset switching condition The mode CCM includes:
    在所述电压信息满足以下条件中的一个或多个时,确定所述电压信息满足预设切换条件,将所述PFC电路的控制模式切换为连续导通模式CCM,When the voltage information satisfies one or more of the following conditions, determining that the voltage information meets a preset switching condition, and switching a control mode of the PFC circuit to a continuous conduction mode CCM,
    其中,当所述电压信息满足以下条件中的一个或多个时,确定所述电压信息满足预设切换条件:所述PFC电路的输入电压瞬时值的最大值大于预设最大阈值、所述PFC电路的输入电压在设定周期内的有效值大于预设有效阈值、所述PFC电路的输入电压在设定周期内的平均值大于预设平均阈值、以及所述PFC电路的输出电压和输入电压的差值小于预设差值阈值。Wherein, when the voltage information satisfies one or more of the following conditions, determining that the voltage information satisfies a preset switching condition: a maximum value of an input voltage instantaneous value of the PFC circuit is greater than a preset maximum threshold, the PFC The effective value of the input voltage of the circuit in the set period is greater than the preset effective threshold, the average value of the input voltage of the PFC circuit in the set period is greater than a preset average threshold, and the output voltage and the input voltage of the PFC circuit The difference is less than the preset difference threshold.
  5. 根据权利要求3所述的控制方法,其特征在于,所述电路参数信息包括工作频率时,在确定所述电路参数信息满足预设切换条件时将所述PFC电路的控制模式切换为连续导通模式CCM包括:The control method according to claim 3, wherein when the circuit parameter information includes an operating frequency, switching the control mode of the PFC circuit to continuous conduction when determining that the circuit parameter information satisfies a preset switching condition The mode CCM includes:
    当所述PFC电路的工作频率小于预设频率阈值时,确定所述工作频率满足预设切换条件,将所述PFC电路的控制模式切换为连续导通模式CCM。When the operating frequency of the PFC circuit is less than the preset frequency threshold, determining that the operating frequency meets a preset switching condition, switching the control mode of the PFC circuit to the continuous conduction mode CCM.
  6. 根据权利要求3所述的控制方法,其特征在于,所述电路参数信息包括发波周期时,在确定所述电路参数信息满足预设切换条件时将所述PFC电路的控制模式切换为连续导通模式CCM包括:The control method according to claim 3, wherein when the circuit parameter information comprises a wave period, the control mode of the PFC circuit is switched to a continuous guide when it is determined that the circuit parameter information satisfies a preset switching condition The pass mode CCM includes:
    在所述PFC电路的发波周期大于预设时长时,确定所述发波周期满足预设切换条件,将所述PFC电路的控制模式切换为连续导通模式CCM。When the wave period of the PFC circuit is greater than the preset duration, it is determined that the wave period meets a preset switching condition, and the control mode of the PFC circuit is switched to the continuous conduction mode CCM.
  7. 一种功率因数校正PFC电路的控制装置,其特征在于,包括:A control device for a power factor correction PFC circuit, comprising:
    获取单元,用于获取所述PFC电路的电路参数信息;An acquiring unit, configured to acquire circuit parameter information of the PFC circuit;
    切换单元,用于在确定所述电路参数信息满足预设切换条件时,将所述PFC电路的控制模式切换为连续导通模式CCM。And a switching unit, configured to switch the control mode of the PFC circuit to the continuous conduction mode CCM when determining that the circuit parameter information satisfies a preset switching condition.
  8. 根据权利要求7所述的控制装置,其特征在于,所述切换单元还用于:在将所述PFC电路的控制模式切换为CCM之后,确定所述电路参数信息不满足所述预设切换条件时,将所述PFC电路的控制模式切换为三角波电流模式TCM或者临界导通模式CRM。The control device according to claim 7, wherein the switching unit is further configured to: after switching the control mode of the PFC circuit to CCM, determining that the circuit parameter information does not satisfy the preset switching condition At this time, the control mode of the PFC circuit is switched to a triangular wave current mode TCM or a critical conduction mode CRM.
  9. 根据权利要求7所述的控制装置,其特征在于,所述电路参数信息包括以下一种或多种:电压信息、工作频率以及发波周期。The control device according to claim 7, wherein the circuit parameter information comprises one or more of the following: voltage information, an operating frequency, and a wave period.
  10. 根据权利要求9所述的控制装置,其特征在于,所述电路参数信息包括电压信息,所述切换单元具体用于:The control device according to claim 9, wherein the circuit parameter information comprises voltage information, and the switching unit is specifically configured to:
    当所述电压信息满足以下条件中的一个或多个时,确定所述电压信息满足预设切换条件,将所述PFC电路的控制模式切换为连续导通模式CCM:When the voltage information satisfies one or more of the following conditions, determining that the voltage information satisfies a preset switching condition, and switching the control mode of the PFC circuit to the continuous conduction mode CCM:
    所述PFC电路的输入电压瞬时值的最大值大于预设最大阈值、所述PFC电路的输入电压在设定周期内的有效值大于预设有效阈值、所述PFC电路的输入电压在设定周期内的平均值大于预设平均阈值、以及所述PFC电路的输出电压和输入电压的差值小于预设差值阈值。The maximum value of the input voltage instantaneous value of the PFC circuit is greater than a preset maximum threshold, the effective value of the input voltage of the PFC circuit in the set period is greater than a preset effective threshold, and the input voltage of the PFC circuit is in a set period The average value within is greater than a predetermined average threshold, and the difference between the output voltage and the input voltage of the PFC circuit is less than a preset difference threshold.
  11. 根据权利要求9所述的控制装置,其特征在于,所述电路参数信息包括工作频率,所述切换单元具体用于:The control device according to claim 9, wherein the circuit parameter information comprises an operating frequency, and the switching unit is specifically configured to:
    当所述PFC电路的工作频率小于预设频率阈值时,确定所述工作频率满足预设切换条件,将所述PFC电路的控制模式切换为连续导通模式CCM。When the operating frequency of the PFC circuit is less than the preset frequency threshold, determining that the operating frequency meets a preset switching condition, switching the control mode of the PFC circuit to the continuous conduction mode CCM.
  12. 根据权利要求9所述的控制装置,其特征在于,所述电路参数信息包括发波周期,所述切换单元具体用于:The control device according to claim 9, wherein the circuit parameter information comprises a wave period, and the switching unit is specifically configured to:
    当所述PFC电路的发波周期大于预设时长时,确定所述发波周期满足预设切换条件,将所述PFC电路的控制模式切换为连续导通模式CCM。When the wave period of the PFC circuit is greater than the preset duration, it is determined that the wave period meets a preset switching condition, and the control mode of the PFC circuit is switched to the continuous conduction mode CCM.
  13. 一种功率因数校正PFC电路的控制设备,其特征在于,包括存储器以及处理器,其中:A control device for a power factor correction PFC circuit, comprising: a memory and a processor, wherein:
    所述存储器用于存储程序指令;The memory is configured to store program instructions;
    所述处理器用于调用所述存储器中存储的程序指令,并按照获得的程序执行权利要求1-6中任一项所述的功率因数校正PFC电路的控制方法。The processor is configured to invoke a program instruction stored in the memory, and execute the control method of the power factor correction PFC circuit according to any one of claims 1-6 according to the obtained program.
  14. 一种计算机存储介质,其特征在于,所述计算机存储介质存储有计算机可执行指令,所述计算机可执行指令用于使所述计算机执行权利要求1-6中任一项所述的功率因数校正PFC电路的控制方法。A computer storage medium, characterized in that the computer storage medium stores computer executable instructions for causing the computer to perform the power factor correction of any one of claims 1-6 The control method of the PFC circuit.
PCT/CN2019/076451 2017-12-29 2019-02-28 Control method, apparatus, device, and medium for power factor correction pfc circuit WO2019129311A1 (en)

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