WO2021017861A1 - 一种隔离保护电路和电压转换装置 - Google Patents

一种隔离保护电路和电压转换装置 Download PDF

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Publication number
WO2021017861A1
WO2021017861A1 PCT/CN2020/102386 CN2020102386W WO2021017861A1 WO 2021017861 A1 WO2021017861 A1 WO 2021017861A1 CN 2020102386 W CN2020102386 W CN 2020102386W WO 2021017861 A1 WO2021017861 A1 WO 2021017861A1
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control signal
transformer
primary coil
secondary coil
circuit
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PCT/CN2020/102386
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English (en)
French (fr)
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卢驭龙
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卢驭龙
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers

Definitions

  • This application relates to the field of electronic technology, and in particular to an isolation protection circuit and a voltage conversion device.
  • the output characteristic of the bridge circuit is that the two control signals must be turned on in turn, and there is an interval of tens of nanoseconds (commonly known as dead time). If the interference signal is affected, the two control signals will generate high At the level, the upper and lower arms of the same phase input high level at the same time to cause a short circuit, which will cause a short circuit in the driven power device (usually a MOS tube or an IGBT tube) and damage the power device.
  • the driven power device usually a MOS tube or an IGBT tube
  • One of the objectives of the embodiments of the present application is to provide an isolation protection circuit and a voltage conversion device, which aims to solve the short circuit of the driven power device when the two control signals in the traditional technical solution generate high levels at the same time.
  • the problem of damaging power devices is to provide an isolation protection circuit and a voltage conversion device, which aims to solve the short circuit of the driven power device when the two control signals in the traditional technical solution generate high levels at the same time. The problem of damaging power devices.
  • an isolation protection circuit which is connected between a drive circuit and a bridge circuit, and the isolation protection circuit includes:
  • An isolation module connected to the drive circuit and used to generate a third control signal and a fourth control signal according to the first control signal and the second control signal;
  • the isolation module includes a transformer, the transformer includes a primary coil, a first secondary coil and a second secondary coil; the first end of the primary coil is the first control signal input end of the transformer, the The second end of the primary coil is the second control signal input end of the transformer, and the end of the same name of the first secondary coil and the end of the same name of the first secondary coil are the third end of the transformer.
  • a control signal output terminal, the same-named terminal of the second secondary coil and a different-named terminal of the second secondary coil are the fourth control signal output terminal of the transformer;
  • the end of the same name of the first secondary coil and the end of the same name of the primary coil are arranged in the same direction, and the end of the same name of the second secondary coil is arranged in the opposite direction to the end of the primary coil;
  • the bridge circuit is also used to generate an output voltage according to the third control signal and the fourth control signal.
  • it further includes:
  • a sampling module connected to the bridge circuit for generating a detection voltage according to the detected output voltage
  • the driving circuit is also used to generate the first control signal and the second control signal according to the detection voltage. In one of the embodiments, it further includes:
  • a first current-limiting resistor connected to the drive circuit and the first end of the primary coil of the transformer and used to perform current-limiting processing on the first control signal;
  • a second current-limiting resistor connected to the driving circuit and the second end of the primary coil of the transformer and used for current-limiting processing of the second control signal.
  • it further includes:
  • a first filter capacitor connected to the drive circuit and the first end of the primary coil of the transformer, used for filtering the first control signal
  • a second filter capacitor connected to the driving circuit and the second end of the primary coil of the transformer and used for filtering the second control signal.
  • it further includes: a first diode and a second diode;
  • the cathode of the first diode is connected to the first end of the primary coil, the anode of the first diode is grounded, and the cathode of the second diode is connected to the second end of the primary coil , The anode of the second diode is grounded.
  • a voltage conversion device which includes a drive circuit, a bridge circuit, and the aforementioned isolation protection circuit.
  • the isolation module includes a transformer
  • the transformer includes a primary coil, a first secondary coil, and a second secondary coil
  • the first end of the primary coil is the first end of the transformer
  • a control signal input terminal is the second terminal of the primary coil is the second control signal input terminal of the transformer
  • the same name terminal of the first secondary coil and the different name terminal of the first secondary coil are the third control signal of the transformer
  • the output end, the same-named end of the second secondary coil and the synonymous end of the second secondary coil are the fourth control signal output end of the transformer
  • the same-named end of the first secondary coil and the primary side The ends of the coils with the same name are set in the same direction, and the end with the same name of the second secondary coil is set in the opposite direction to that of the primary coil.
  • the primary side There is no current at both ends of the coil, and neither the first secondary side coil nor the second secondary side coil can induce current.
  • the third control signal and the fourth control signal are both low level, so that the bridge circuit stops working and prevents the first control signal
  • the second control signal is at a high level at the same time, the power device of the bridge circuit is short-circuited, causing the power device to be burned.
  • FIG. 1 is a schematic diagram of a module structure of an isolation protection circuit provided by an embodiment of the application
  • FIG. 2 is a schematic diagram of another module structure of the isolation protection circuit provided by an embodiment of the application.
  • Fig. 3 is a schematic circuit diagram of an example of the isolation protection circuit shown in Fig. 1.
  • FIG. 1 is a schematic diagram of the module structure of an isolation protection circuit provided by an embodiment of this application.
  • the isolation protection circuit provided by this application is connected between the driving circuit 2 and the bridge circuit 3.
  • the isolation protection circuit Includes: isolation module 10 isolation module 10.
  • Isolation module 10 The isolation module 10 is connected to the drive circuit 2, and is used to generate a third control signal CT3 and a fourth control signal CT4 according to the first control signal CT1 and the second control signal CT2; wherein, the isolation module 10 includes a transformer T1 and a transformer T1.
  • the equation circuit 3 is used to generate the output voltage according to the third control signal CT3 and the fourth control signal CT4.
  • the aforementioned isolation protection circuit includes an isolation module 10 connected to the drive circuit and the bridge circuit. Since the isolation module 10 includes a transformer T1, the transformer T1 includes a primary coil, a first secondary coil, and a second secondary coil; The first end of the coil is the first control signal input end of the transformer T1, the second end of the primary coil is the second control signal input end of the transformer T1, the same name end of the first secondary coil is different from the first secondary coil.
  • the name end and the synonymous end of the first secondary coil are the third control signal output end of the transformer T1, the same name end of the second secondary coil and the synonymous end of the second secondary coil and the second secondary coil
  • the synonymous end is the fourth control signal output end of the transformer T1; the end of the same name of the first secondary coil and the end of the same name of the primary coil are arranged in the same direction, and the same name of the second secondary coil Terminal and the end of the same name of the primary coil are set in reverse, so when the first control signal CT1 and the second control signal CT2 are high at the same time
  • the first control signal CT1 and the second control signal CT2 are both pulse width modulated signals.
  • the first control signal CT1 and the second control signal CT2 output high-level pulse widths respectively.
  • the modulation signal and the low-level pulse width modulation signal control the power devices in the bridge circuit 3 to alternately conduct, that is, under normal circumstances, one of the first control signal CT1 and the second control signal CT2 at the same time It is a high level signal and the other is a low level signal.
  • the current of the primary coil flows from the first end of the primary coil to the second end of the primary coil, and the first secondary coil induces A high-level third control signal CT3 is generated, and the first secondary coil induces a low-level fourth control signal CT4.
  • the first control signal CT1 and the second control signal CT2 are high at the same time due to a fault, there is no voltage at both ends of the primary coil and no current is generated. Neither the first secondary coil nor the second secondary coil can sense The current, the third control signal CT3 and the fourth control signal CT4 are all low level.
  • the isolation protection circuit further includes: a sampling module 20 connected to the bridge circuit for generating a detection voltage according to the detected output voltage; the driving circuit is also used for generating a second detection voltage according to the detection voltage A control signal CT1 and the second control signal CT2.
  • the isolation protection circuit further includes: a first current-limiting resistor connected to the drive circuit 2 and the first end of the primary coil of the transformer T1, and used to perform current-limiting processing on the first control signal CT1 R1; a second current-limiting resistor R2 connected to the driving circuit 2 and the second end of the primary coil of the transformer T1 and used for current-limiting the second control signal CT2.
  • the isolation protection circuit further includes: a first filter capacitor (C1, C2) connected to the drive circuit 2 for filtering the first control signal CT1; connected to the drive circuit 2 for The second control signal CT2 is filtered by the second filter capacitor (C3, C4).
  • the isolation protection circuit further includes: a first diode D1 and a second diode D2; the cathode of the first diode D1 is connected to the first end of the primary coil, and the first diode D1 The anode of the second diode D2 is grounded, the cathode of the second diode D2 is connected to the second end of the primary coil, and the anode of the second diode D2 is grounded.
  • a voltage conversion device which includes a drive circuit 2, a bridge circuit 3, and the aforementioned isolation protection circuit.
  • the first control signal CT1 when the first control signal CT1 is at a high level and the second control signal CT2 is at a low level, the current of the primary coil flows from the first end of the primary coil to the second end of the primary coil.
  • the secondary coil induces a high-level third control signal CT3, and the second secondary coil induces a low-level fourth control signal CT4.
  • the first control signal CT1 is at low level and the second control signal CT2 is at high level
  • the current of the primary coil flows from the second end of the primary coil to the first end of the primary coil, and the second secondary coil induces The high-level fourth control signal CT4, the first secondary coil induces a low-level third control signal CT3.
  • the power devices in the bridge circuit 3 are turned on alternately, and the bridge circuit 3 generates an output voltage according to the third control signal CT3 and the fourth control signal CT4.
  • the present application provides an isolation protection circuit and a voltage conversion device, which are connected between the drive circuit 2 and the bridge circuit 3, and the isolation protection circuit includes an isolation module 10 and an isolation module 10.
  • the aforementioned isolation protection circuit includes an isolation module 10 connected to the drive circuit and the bridge circuit.
  • the isolation module 10 includes a transformer T1
  • the transformer T1 includes a primary coil, a first secondary coil, and a second secondary coil
  • the first end of the coil is the first control signal input end of the transformer T1
  • the second end of the primary coil is the second control signal input end of the transformer T1
  • the same name end of the first secondary coil is different from the first secondary coil
  • the named terminal is the third control signal output terminal of the transformer T1
  • the same-named terminal of the second secondary coil and the synonymous terminal of the second secondary coil are the fourth control signal output terminal of the transformer T1
  • the end of the same name of the first secondary coil and the end of the same name of the primary coil are set in the same direction
  • the end of the same name of the second secondary coil is set in the opposite direction of the end of the primary coil, so when the first control signal When CT1 and the second control signal CT2 are high at the same time, there is no current at both ends of the primary coil, and neither the first secondary coil nor the second secondary coil can induce current.
  • the third control signal CT3 and the fourth control signal CT4 are both It is a low level to stop the bridge circuit from working to prevent the power devices of the bridge circuit from being short-circuited when the first control signal CT1 and the second control signal CT2 are both at a high level, causing the power devices to be burned.

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Abstract

一种隔离保护电路和电压转换装置，隔离保护电路连接于驱动电路(2)和桥式电路(3)之间，其包括：隔离模块(10)，隔离模块(10)与驱动电路(2)连接，用于根据第一控制信号和第二控制信号生成第三控制信号和第四控制信号；隔离模块(10)包括变压器，变压器包括原边线圈、第一副边线圈以及第二副边线圈；原边线圈的第一端为变压器的第一控制信号输入端，原边线圈的第二端为变压器的第二控制信号输入端，第一副边线圈的同名端为变压器的第三控制信号输出端，第二副边线圈的同名端为变压器的第四控制信号输出端；第一副边线圈的同名端与原边线圈的同名端同向设置，第二副边线圈的同名端与原边线圈的同名端反向设置。

Description

一种隔离保护电路和电压转换装置
本申请要求于2019年07月26日在中国专利局提交的、申请号为201921201410.7、发明名称为“一种隔离保护电路和电压转换装置”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。
技术领域
本申请涉及电子技术领域，尤其涉及一种隔离保护电路和电压转换装置。
 背景技术
桥式电路的输出特点是，两路控制信号，必须是轮流导通，中间还有几十纳秒的间隔时间（俗称死区时间），如果受干扰信号的影响，两路控制信号同时产生高电平时，同一相上下两个桥臂同时输入高电平造成短路，则会造成被驱动的功率器件（通常是MOS管或IGBT管）产生短路，损坏功率器件。
因此，传统的技术方案中存在两路控制信号同时产生高电平时，造成被驱动的功率器件产生短路，损坏功率器件的问题。
 技术问题
本申请实施例的目的之一在于：提供一种隔离保护电路和电压转换装置，旨在解决传统的技术方案中存在的两路控制信号同时产生高电平时，造成被驱动的功率器件产生短路，损坏功率器件的问题。
 技术解决方案
为解决上述技术问题，本申请实施例采用的技术方案是：
第一方面，提供了一种隔离保护电路，连接于驱动电路和桥式电路之间，所述隔离保护电路包括：
与所述驱动电路连接，用于根据第一控制信号和第二控制信号生成第三控制信号和第四控制信号的隔离模块；
所述隔离模块包括变压器，所述变压器包括原边线圈、第一副边线圈以及第二副边线圈；所述原边线圈的第一端为所述变压器的第一控制信号输入端，所述原边线圈的第二端为所述变压器的第二控制信号输入端，所述第一副边线圈的同名端和所述第一副边线圈的异名端为所述变压器的所述第三控制信号输出端，所述第二副边线圈的同名端和所述第二副边线圈的异名端为所述变压器的所述第四控制信号输出端；
所述第一副边线圈的同名端与所述原边线圈的同名端同向设置，所述第二副边线圈的同名端与所述原边线圈的同名端反向设置；
所述桥式电路还用于根据所述第三控制信号和所述第四控制信号生成输出电压。
在其中一个实施例中，还包括：
与所述桥式电路连接，用于根据检测的所述输出电压生成检测电压的采样模块；
所述驱动电路还用于根据所述检测电压生成所述第一控制信号和所述第二控制信号。在其中一个实施例中，还包括：
与所述驱动电路以及所述变压器的所述原边线圈的第一端连接，用于对所述第一控制信号进行限流处理的第一限流电阻；
与所述驱动电路以及所述变压器的所述原边线圈的第二端连接，用于对所述第二控制信号进行限流处理的第二限流电阻。
在其中一个实施例中，还包括：
与所述驱动电路连接以及所述变压器的所述原边线圈的第一端，用于对所述第一控制信号进行滤波处理的第一滤波电容；
与所述驱动电路以及所述变压器的所述原边线圈的第二端连接，用于对所述第二控制信号进行滤波处理的第二滤波电容。
在其中一个实施例中，还包括：第一二极管和第二二极管；
所述第一二极管的负极连接所述原边线圈的第一端，所述第一二极管的正极接地，所述第二二极管的负极连接所述原边线圈的第二端，所述第二二极管的正极接地。
第二方面，提供了一种电压转换装置，包括驱动电路、桥式电路以及上述的隔离保护电路。
 有益效果
本申请实施例提供的隔离保护电路的有益效果在于：由于隔离模块包括变压器，变压器包括原边线圈、第一副边线圈以及第二副边线圈；述原边线圈的第一端为变压器的第一控制信号输入端，原边线圈的第二端为变压器的第二控制信号输入端，第一副边线圈的同名端和第一副边线圈的异名端为变压器的所述第三控制信号输出端，第二副边线圈的同名端和第二副边线圈的异名端为所述变压器的所述第四控制信号输出端；所述第一副边线圈的同名端与所述原边线圈的同名端同向设置，所述第二副边线圈的同名端与所述原边线圈的同名端反向设置，故当第一控制信号和第二控制信号同时为高电平时，原边线圈两端无电流，第一副边线圈以及第二副边线圈均感应不到电流，第三控制信号和第四控制信号均为低电平，使桥式电路停止工作，防止第一控制信号和第二控制信号同时为高电平时，桥式电路的功率器件短路，导致功率器件被烧毁。
 附图说明
图1为本申请实施例提供的隔离保护电路的一种模块结构示意图；
图2为本申请实施例提供的隔离保护电路的另一种模块结构示意图；
图3为图1所示的隔离保护电路的示例电路原理图。
 本发明的实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。同时，在本申请的描述中，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。
应当理解，当在本说明书和所附权利要求书中使用时，术语“包括”指示所描述特征、整体、步骤、操作、元素和/或组件的存在，但并不排除一个或多个其它特征、整体、步骤、操作、元素、组件和/或其集合的存在或添加。
还应当理解，在此本申请说明书中所使用的术语仅仅是出于描述特定实施例的目的而并不意在限制本申请。如在本申请说明书和所附权利要求书中所使用的那样，除非上下文清楚地指明其它情况，否则单数形式的“一”、“一个”及“该”意在包括复数形式。
还应当进一步理解，在本申请说明书和所附权利要求书中使用的术语“和/或”是指相关联列出的项中的一个或多个的任何组合以及所有可能组合，并且包括这些组合。
为了说明本申请上述的技术方案，下面通过具体实施例来进行说明。
图1为本申请实施例提供的一种隔离保护电路的模块结构示意图，如图1所示，本申请提供的隔离保护电路，连接于驱动电路2和桥式电路3之间，该隔离保护电路包括：隔离模块10隔离模块10。隔离模块10隔离模块10与驱动电路2连接，用于根据第一控制信号CT1和第二控制信号CT2生成第三控制信号CT3和第四控制信号CT4；其中，隔离模块10包括变压器T1，变压器T1包括原边线圈、第一副边线圈以及第二副边线圈；原边线圈的第一端为变压器T1的第一控制信号输入端，原边线圈的第二端为变压器T1的第二控制信号输入端，第一副边线圈的同名端和第一副边线圈的异名端为变压器T1的第三控制信号输出端，第二副边线圈的同名端和第二副边线圈的异名端为变压器T1的第四控制信号输出端；第一副边线圈的同名端与原边线圈的同名端同向设置，第二副边线圈的同名端与原边线圈的同名端反向设置；桥式电路3用于根据第三控制信号CT3和第四控制信号CT4生成所述输出电压。
上述的隔离保护电路，包括与驱动电路和桥式电路连接的隔离模块10，由于隔离模块10包括变压器T1，变压器T1包括原边线圈、第一副边线圈以及第二副边线圈；述原边线圈的第一端为变压器T1的第一控制信号输入端，原边线圈的第二端为变压器T1的第二控制信号输入端，第一副边线圈的同名端和第一副边线圈的异名端和第一副边线圈的异名端为变压器T1的所述第三控制信号输出端，第二副边线圈的同名端和第二副边线圈的异名端和第二副边线圈的异名端为所述变压器T1的所述第四控制信号输出端；所述第一副边线圈的同名端与所述原边线圈的同名端同向设置，所述第二副边线圈的同名端与所述原边线圈的同名端反向设置，故当第一控制信号CT1和第二控制信号CT2同时为高电平时，原边线圈两端无电流，第一副边线圈以及第二副边线圈均感应不到电流，第三控制信号CT3和第四控制信号CT4均为低电平，使桥式电路停止工作，防止第一控制信号CT1和第二控制信号CT2同时为高电平时，桥式电路的功率器件短路，导致功率器件被烧毁。
具体来说，第一控制信号CT1和第二控制信号CT2均为脉冲宽度调制信号，桥式电路3在正常工作时，第一控制信号CT1和第二控制信号CT2分别输出高电平的脉冲宽度调制信号和低电平的脉冲宽度调制信号，控制桥式电路3中的功率器件交替导通，即在正常情况下，在同一时刻的第一控制信号CT1和第二控制信号CT2中，其中一个为高电平信号，另一个为低电平信号。当第一控制信号CT1为高电平、第二控制信号CT2为低电平时，原边线圈的电流流向为原边线圈的第一端至原边线圈的第二端，第一副边线圈感应生成高电平的第三控制信号CT3，第一副边线圈感应生成低电平的第四控制信号CT4。当由于故障导致第一控制信号CT1和第二控制信号CT2同时为高电平时，原边线圈的两端无电压，也不产生电流，第一副边线圈和第二副边线圈均无法感应到电流，第三控制信号CT3和第四控制信号CT4均为低电平。
如图2所示，在其中一个实施例中，隔离保护电路还包括：与桥式电路连接，用于根据检测的输出电压生成检测电压的采样模块20；驱动电路还用于根据检测电压生成第一控制信号CT1和所述第二控制信号CT2。
在其中一个实施例中，隔离保护电路还包括：与驱动电路2以及变压器T1的所述原边线圈的第一端连接，用于对第一控制信号CT1进行限流处理的第一限流电阻R1；与驱动电路2以及变压器T1的所述原边线圈的第二端连接，用于对第二控制信号CT2进行限流处理的第二限流电阻R2。
在其中一个实施例中，隔离保护电路还包括：与驱动电路2连接，用于对第一控制信号CT1进行滤波处理的第一滤波电容（C1、C2）；与驱动电路2连接，用于对第二控制信号CT2进行滤波处理的第二滤波电容（C3、C4）。
在其中一个实施例中，隔离保护电路还包括：第一二极管D1和第二二极管D2；第一二极管D1的负极连接原边线圈的第一端，第一二极管D1的正极接地，第二二极管D2的负极连接原边线圈的第二端，第二二极管D2的正极接地。
此外，还提供了一种电压转换装置，包括驱动电路2、桥式电路3以及上述的隔离保护电路。
以下结合工作原理对图3进行进一步说明。
正常工作模式下，第一控制信号CT1为高电平、第二控制信号CT2为低电平时，原边线圈的电流流向为原边线圈的第一端至原边线圈的第二端，第一副边线圈感应生成高电平的第三控制信号CT3，第二副边线圈感应生成低电平的第四控制信号CT4。第一控制信号CT1为低电平、第二控制信号CT2为高电平时，原边线圈的电流流向为原边线圈的第二端至原边线圈的第一端，第二副边线圈感应生成高电平的第四控制信号CT4，第一副边线圈感应生成低电平的第三控制信号CT3。桥式电路3中的功率器件交替导通，桥式电路3根据第三控制信号CT3和第四控制信号CT4生成输出电压。
当由于第一控制信号CT1和第二控制信号CT2电平转换的瞬间或者故障导致第一控制信号CT1和第二控制信号CT2同时为高电平时，原边线圈的两端无电压，也不产生电流，第一副边线圈和第二副边线圈均无法感应到电流，第三控制信号CT3和第四控制信号CT4均为低电平。桥式电路3中的所有功率器件均关断，桥式电路3停止工作，从而防止第一控制信号CT1和第二控制信号CT2同时为高电平时，桥式电路3的功率器件短路，导致功率器件被烧毁。
综上，本申请提供了一种隔离保护电路和电压转换装置，连接于驱动电路2和桥式电路3之间，该隔离保护电路包括：隔离模块10隔离模块10。上述的隔离保护电路，包括与驱动电路和桥式电路连接的隔离模块10，由于隔离模块10包括变压器T1，变压器T1包括原边线圈、第一副边线圈以及第二副边线圈；述原边线圈的第一端为变压器T1的第一控制信号输入端，原边线圈的第二端为变压器T1的第二控制信号输入端，第一副边线圈的同名端和第一副边线圈的异名端为变压器T1的所述第三控制信号输出端，第二副边线圈的同名端和第二副边线圈的异名端为所述变压器T1的所述第四控制信号输出端；所述第一副边线圈的同名端与所述原边线圈的同名端同向设置，所述第二副边线圈的同名端与所述原边线圈的同名端反向设置，故当第一控制信号CT1和第二控制信号CT2同时为高电平时，原边线圈两端无电流，第一副边线圈以及第二副边线圈均感应不到电流，第三控制信号CT3和第四控制信号CT4均为低电平，使桥式电路停止工作，防止第一控制信号CT1和第二控制信号CT2同时为高电平时，桥式电路的功率器件短路，导致功率器件被烧毁。
以上所述仅为本申请的较佳实施例而已，并不用以限制本申请，凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本申请的保护范围之内。

Claims (6)

  1. 一种隔离保护电路，连接于驱动电路和桥式电路之间，其特征在于，所述隔离保护电路包括：
    与所述驱动电路连接，用于根据第一控制信号和第二控制信号生成第三控制信号和第四控制信号的隔离模块；
    所述隔离模块包括变压器，所述变压器包括原边线圈、第一副边线圈以及第二副边线圈；所述原边线圈的第一端为所述变压器的第一控制信号输入端，所述原边线圈的第二端为所述变压器的第二控制信号输入端，所述第一副边线圈的同名端和所述第一副边线圈的异名端为所述变压器的所述第三控制信号输出端，所述第二副边线圈的同名端和所述第二副边线圈的异名端为所述变压器的所述第四控制信号输出端；
    所述第一副边线圈的同名端与所述原边线圈的同名端同向设置，所述第二副边线圈的同名端与所述原边线圈的同名端反向设置；
    所述桥式电路还用于根据所述第三控制信号和所述第四控制信号生成输出电压。
  2. 如权利要求1所述的隔离保护电路，其特征在于，还包括：
    与所述桥式电路连接，用于根据检测的所述输出电压生成检测电压的采样模块；
    所述驱动电路还用于根据所述检测电压生成所述第一控制信号和所述第二控制信号。
  3. 如权利要求1所述的隔离保护电路，其特征在于，还包括：
    与所述驱动电路以及所述变压器的所述原边线圈的第一端连接，用于对所述第一控制信号进行限流处理的第一限流电阻；
    与所述驱动电路以及所述变压器的所述原边线圈的第二端连接，用于对所述第二控制信号进行限流处理的第二限流电阻。
  4. 如权利要求1所述的隔离保护电路，其特征在于，还包括：
    与所述驱动电路以及所述变压器的所述原边线圈的第一端连接，用于对所述第一控制信号进行滤波处理的第一滤波电容；
    与所述驱动电路以及所述变压器的所述原边线圈的第二端连接，用于对所述第二控制信号进行滤波处理的第二滤波电容。
  5. 如权利要求1所述的隔离保护电路，其特征在于，还包括：第一二极管和第二二极管；
    所述第一二极管的负极连接所述原边线圈的第一端，所述第一二极管的正极接地，所述第二二极管的负极连接所述原边线圈的第二端，所述第二二极管的正极接地。
  6. 一种电压转换装置，其特征在于，包括驱动电路、桥式电路以及如权利要求1至5任一项所述的隔离保护电路。
PCT/CN2020/102386 2019-07-26 2020-07-16 一种隔离保护电路和电压转换装置 WO2021017861A1 (zh)

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