CN112187070A - Thyristor parallel connection alternating conduction rectifier circuit silicon controlled rectifier/thyristor - Google Patents
Thyristor parallel connection alternating conduction rectifier circuit silicon controlled rectifier/thyristor Download PDFInfo
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- CN112187070A CN112187070A CN202010931425.XA CN202010931425A CN112187070A CN 112187070 A CN112187070 A CN 112187070A CN 202010931425 A CN202010931425 A CN 202010931425A CN 112187070 A CN112187070 A CN 112187070A
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- bridge arm
- thyristor
- rectifying circuit
- thyristors
- parallel
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
- H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit
- H02M7/1626—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit with automatic control of the output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/17—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in parallel
Abstract
The invention provides a thyristor parallel connection alternate conduction rectifying circuit, which comprises a rectifying circuit and a control module; the control module is connected with the rectifying circuit through a control end and is used for controlling the alternate conduction of the thyristors which are connected in parallel in the rectifying circuit; the first bridge arm and the second bridge arm of the upper half bridge of the rectifying circuit are respectively composed of two thyristors which are connected in parallel; the third bridge arm and the fourth bridge arm of the lower half bridge are respectively composed of at least one diode; cathodes of two thyristors in parallel connection on the first bridge arm and the second bridge arm are positive output ends of the rectifying circuit; anodes of the diodes on the third bridge arm and the fourth bridge arm are negative output ends of the rectifying circuit; and the positive output end and the negative output end of the rectifying circuit are respectively connected with two ends of the capacitor. The current sharing function of the two thyristors is realized by controlling the thyristors used in parallel to be conducted alternately.
Description
Technical Field
The invention relates to the technical field of switching power supply application, in particular to a thyristor parallel connection alternate conduction rectifying circuit.
Background
Switching power supplies are essential critical components in modern electronic systems. The switching power supply is used for converting input voltage into output voltage meeting the load requirement, the rectifying circuit is a main part of the switching power supply, and the rectifying circuit is used for converting alternating current into unidirectional pulsating direct current.
The existing semi-controlled bridge rectifier circuit adopting thyristors and diodes has the advantages that when the input current is larger due to larger load power, any bridge arm formed by the thyristors needs to be connected with two thyristors in parallel to bear the current stress, the control signals of the thyristors used in parallel are simultaneously switched on and off when the same control signal is the same, the input current flows into the two thyristors at the same time, but the current flowing through the thyristors is not controlled, and the current flowing through the thyristors used in parallel cannot be evenly distributed, so that the devices flowing through the thyristors with larger current can generate more heat easily, the reliability of the devices cannot be guaranteed, and the service life of the whole switching power supply can be greatly shortened.
Disclosure of Invention
The invention aims to provide a thyristor parallel connection alternate conduction rectifying circuit, which realizes the current equalizing function of two thyristors by controlling the thyristors used in parallel connection to be alternately conducted.
The embodiment of the invention provides a thyristor parallel connection alternate conduction rectifying circuit, which comprises a rectifying circuit and a control module;
the control module is connected with the rectifying circuit through a control end and is used for controlling the alternate conduction of the thyristors which are connected in parallel in the rectifying circuit;
the first bridge arm and the second bridge arm of the upper half bridge of the rectifying circuit are respectively composed of two thyristors which are connected in parallel; the third bridge arm and the fourth bridge arm of the lower half bridge are respectively composed of at least one diode; wherein the content of the first and second substances,
cathodes of two thyristors in parallel connection on the first bridge arm and the second bridge arm are positive output ends of the rectification circuit;
anodes of the diodes on the third bridge arm and the fourth bridge arm are negative output ends of the rectifying circuit;
and the positive output end and the negative output end of the rectifying circuit are respectively connected with two ends of the capacitor.
As a preferred scheme, anodes of two parallel thyristors in the first arm and the second arm are respectively connected with a live wire and a zero wire of an alternating current power supply, and cathodes of diodes in the third arm and the fourth arm are respectively connected with the live wire and the zero wire of the alternating current power supply.
As a preferred scheme, the control module is connected to the rectifying circuit through a control end, specifically:
the input end of the control module is connected with a live wire and a zero line of an alternating current power supply, and the output end of the control module comprises four control ends which are correspondingly connected with four thyristors of the rectifying circuit.
As a preferred scheme, the third leg and the fourth leg of the lower half bridge are respectively composed of at least one diode, specifically:
the third bridge arm and the fourth bridge arm of the lower half bridge are respectively composed of a diode, or at least two diodes connected in parallel.
Preferably, the control module is an analog signal controller or a digital signal controller.
Compared with the prior art, the embodiment of the invention has the beneficial effects that:
the invention provides a thyristor parallel connection alternate conduction rectifying circuit, which comprises a rectifying circuit and a control module; the control module is connected with the rectifying circuit through a control end and is used for controlling the alternate conduction of the thyristors which are connected in parallel in the rectifying circuit; the first bridge arm and the second bridge arm of the upper half bridge of the rectifying circuit are respectively composed of two thyristors which are connected in parallel; the third bridge arm and the fourth bridge arm of the lower half bridge are respectively composed of at least one diode; cathodes of two thyristors in parallel connection on the first bridge arm and the second bridge arm are positive output ends of the rectifying circuit; anodes of the diodes on the third bridge arm and the fourth bridge arm are negative output ends of the rectifying circuit; and the positive output end and the negative output end of the rectifying circuit are respectively connected with two ends of the capacitor. The invention realizes the current sharing function of the two thyristors by controlling the thyristors used in parallel to be conducted alternately, can prevent the problem of non-current sharing of the parallel thyristors, and reduces the damage of a large heat circuit generated by a large current flowing through a certain single tube when the thyristors are used in parallel.
Drawings
Fig. 1 is a schematic connection diagram of a thyristor parallel connection alternate conduction rectifier circuit according to an embodiment of the present invention;
fig. 2 is a waveform diagram of a control module in a thyristor parallel connection alternate conduction rectification circuit according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the step numbers used herein are for convenience of description only and are not intended as limitations on the order in which the steps are performed.
It is to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
Thyristors (thyristors) are short for thyristors, also called silicon controlled rectifiers, and formerly called silicon controlled rectifiers for short; the first thyristor product in the world was developed by the U.S. general electric company in 1957 and commercialized in 1958; the thyristor is a PNPN four-layer semiconductor structure, which has three poles: an anode, a cathode and a gate; the working conditions of the thyristor are as follows: applying a forward voltage and having a trigger current at the gate; the derivative devices are as follows: fast thyristors, bidirectional thyristors, reverse conducting thyristors, photothyristors, etc. It is a high-power switch-type semiconductor device, and is indicated by the characters "V" and "VT" (indicated by the letters "SCR" in the old standard) in the circuit. The thyristor has the characteristics of a silicon rectifier device, can work under the conditions of high voltage and large current, can control the working process, and is widely applied to electronic circuits such as controllable rectification, alternating current voltage regulation, contactless electronic switches, inversion, frequency conversion and the like.
Please refer to fig. 1 and fig. 2.
The embodiment of the invention provides a thyristor parallel connection alternate conduction rectifying circuit, which comprises a rectifying circuit and a control module;
the control module is connected with the rectifying circuit through a control end and is used for controlling the alternate conduction of the thyristors which are connected in parallel in the rectifying circuit;
the first bridge arm 1 and the second bridge arm 2 of the upper half bridge of the rectifying circuit are respectively composed of two thyristors which are connected in parallel; the third bridge arm 3 and the fourth bridge arm 4 of the lower half bridge are respectively composed of at least one diode; wherein the content of the first and second substances,
cathodes of two thyristors in parallel connection on the first bridge arm 1 and the second bridge arm 2 are positive output ends of the rectifier circuit;
anodes of the diodes on the third bridge arm 3 and the fourth bridge arm 4 are negative output ends of the rectifying circuit;
and the positive output end and the negative output end of the rectifying circuit are respectively connected with two ends of the capacitor.
In a specific embodiment, the first arm 1 of the upper half bridge of the rectifier circuit is formed by connecting a thyristor Q1 and a thyristor Q2 in parallel, and the second arm 2 is formed by connecting a thyristor Q3 and a thyristor Q4 in parallel; the third leg 3 of the lower half bridge consists of diode D1 and the fourth leg 4 of the lower half bridge consists of diode D2; cathodes of the thyristor Q1 and the thyristor Q2 are positive output ends VO + of the rectifying circuit; anodes of the diodes on the third bridge arm 3 and the fourth bridge arm 4 are negative output ends VO < - >, of the rectification circuit; and a positive output end VO + and a negative output end VO-of the rectifying circuit are respectively connected with two ends of a capacitor C1.
As a preferred scheme, anodes of two parallel thyristors in the first arm 1 and the second arm 2 are respectively connected to a live line L and a zero line N of an ac power supply, and cathodes of diodes in the third arm 3 and the fourth arm 4 are respectively connected to the live line L and the zero line N of the ac power supply.
In a specific embodiment, anodes of the parallel thyristors Q1 and Q2 are respectively connected to a live line L and a neutral line N of an ac power supply, a cathode of the diode D1 is connected to the live line L of the ac power supply, a cathode of the diode D2 is connected to the neutral line N of the ac power supply, the capacitor C1 is composed of one or more parallel capacitors, and the diode D1 and the diode D2 are respectively composed of one or more parallel diodes.
As a preferred scheme, the control module is connected to the rectifying circuit through a control end, specifically:
the input end of the control module is connected with a live wire and a zero line of an alternating current power supply, and the output end of the control module comprises four control ends which are correspondingly connected with four thyristors of the rectifying circuit.
As a preferred scheme, the third leg 3 and the fourth leg 4 of the lower half bridge are respectively composed of at least one diode, specifically:
the third leg 3 and the fourth leg 4 of the lower half bridge are each formed by a diode, or at least two diodes connected in parallel.
Preferably, the control module is an analog signal controller or a digital signal controller.
In one embodiment, the alternating-current input voltage is detected by the control module, only one thyristor is controlled to be turned on in each alternating-current period (when the L end of the live wire is higher than the N end of the zero wire and is defined as a positive half cycle, and when the L end of the live wire is lower than the N end of the zero wire and is defined as a negative half cycle), the thyristor Q1 is turned on in the positive half cycle, the diode D2 is turned on, when the positive half cycle is negative, the thyristor Q3 is turned on, the diode D1 is turned on, the rectification function is completed, when the next alternating-current period is started, the thyristor Q2 is turned on in the positive half cycle, the diode D2 is turned on, and when the negative half cycle is negative, the thyristor Q4 is turned on, the diode D1 is.
In a specific embodiment, the live line L end and the neutral line N end of the ac power supply are connected to the input end of the control module, and the output end of the control module is connected to the gate CT1 of the thyristor Q1, the gate CT2 of the thyristor Q2, the gate CT3 of the thyristor Q3, and the gate CT4 of the thyristor Q4, respectively. When the positive half-cycle alternating current is detected, the thyristor Q1 or the thyristor Q2 is controlled to be conducted, when the negative half-cycle alternating current is detected, the thyristor Q3 or the thyristor Q4 is controlled to be conducted, and until the next alternating current power supply cycle, the thyristors used in parallel are conducted alternately.
In one embodiment, when the ac power supply outputs the ac positive half-cycle voltage, as shown in fig. 2 during t1, the control module detects the positive half-cycle ac voltage signal and sends CT1 and CT3 signals to the gate CT1 and the gate CT3, respectively, and at this time, the thyristor Q1 and the thyristor D2 are turned on to complete the rectification function; when the negative half cycle ac voltage signal is detected, as shown in fig. 2 during t2, the input voltage is reversed because ct3 has already been given to the thyristor Q3 during t1, and the thyristor Q3 and the diode D1 will automatically conduct, completing the rectification function. At the same time, the control module stops sending the CT1 signal to control gate CT1 and instead sends the CT2 signal to control gate CT 2.
In one embodiment, as shown in fig. 2 during t3, since CT2 signal is sent to the gate CT2 of the thyristor Q2 during t2, when the voltage is in phase change, the thyristor Q2 and the diode D2 are turned on to complete the rectification function, and the control module stops sending CT3 signal, but sends CT4 signal to the gate CT4 of the thyristor Q4; similarly, as shown in fig. 2, during t4, since a CT4 signal is sent to the gate CT4 of the thyristor Q4 during t3, when the voltage is in phase change, the thyristor Q4 and the diode D1 are turned on to complete the rectification function, and at the same time, the control module stops sending the CT2 signal, but sends the CT1 signal to the gate CT1 of the thyristor Q1, which is a cycle, and when a new ac cycle comes, the parallel thyristors are turned on alternately for a new round. By the control strategy, the parallel connection alternate conduction and rectification function of the thyristors can be realized, and the parallel connection of the thyristors can be realized to realize the current equalizing function.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (5)
1. A thyristor parallel connection alternate conduction rectifying circuit is characterized by comprising a rectifying circuit and a control module;
the control module is connected with the rectifying circuit through a control end and is used for controlling the alternate conduction of the thyristors which are connected in parallel in the rectifying circuit;
the first bridge arm and the second bridge arm of the upper half bridge of the rectifying circuit are respectively composed of two thyristors which are connected in parallel; the third bridge arm and the fourth bridge arm of the lower half bridge are respectively composed of at least one diode; wherein the content of the first and second substances,
cathodes of two thyristors in parallel connection on the first bridge arm and the second bridge arm are positive output ends of the rectification circuit;
anodes of the diodes on the third bridge arm and the fourth bridge arm are negative output ends of the rectifying circuit;
and the positive output end and the negative output end of the rectifying circuit are respectively connected with two ends of the capacitor.
2. Thyristor parallel alternately conducting rectifier circuit according to claim 1,
the anodes of the two thyristors in parallel connection on the first bridge arm and the second bridge arm are respectively connected with a live wire and a zero wire of an alternating current power supply,
and cathodes of the diodes on the third bridge arm and the fourth bridge arm are respectively connected with a live wire and a zero wire of an alternating current power supply.
3. The thyristor parallel-connection alternate-conduction rectifier circuit according to claim 1, wherein the control module is connected with the rectifier circuit through a control end, specifically:
the input end of the control module is connected with a live wire and a zero line of an alternating current power supply, and the output end of the control module comprises four control ends which are correspondingly connected with four thyristors of the rectifying circuit.
4. The thyristor parallel alternately conducting rectifier circuit of claim 1, wherein the third leg and the fourth leg of the lower half-bridge are each comprised of at least one diode, in particular:
the third bridge arm and the fourth bridge arm of the lower half bridge are respectively composed of a diode, or at least two diodes connected in parallel.
5. The thyristor parallel alternate conduction rectifier circuit of claim 1, wherein the control module is an analog signal controller or a digital signal controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010931425.XA CN112187070A (en) | 2020-09-07 | 2020-09-07 | Thyristor parallel connection alternating conduction rectifier circuit silicon controlled rectifier/thyristor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010931425.XA CN112187070A (en) | 2020-09-07 | 2020-09-07 | Thyristor parallel connection alternating conduction rectifier circuit silicon controlled rectifier/thyristor |
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| CN112187070A true CN112187070A (en) | 2021-01-05 |
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| CN202010931425.XA Pending CN112187070A (en) | 2020-09-07 | 2020-09-07 | Thyristor parallel connection alternating conduction rectifier circuit silicon controlled rectifier/thyristor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024012022A1 (en) * | 2022-07-12 | 2024-01-18 | 深圳核心医疗科技股份有限公司 | Wireless charging rectifier circuit, wireless charging device and ventricular assist device |
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| US20040179379A1 (en) * | 2001-10-25 | 2004-09-16 | Leo Nuutinen | Rectifying circuit |
| JP4363963B2 (en) * | 2003-11-27 | 2009-11-11 | 株式会社東芝 | Current balance controller for power semiconductors used in parallel |
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| CN105897008A (en) * | 2016-06-24 | 2016-08-24 | 南京工程学院 | Rectification device and method of thyristor |
| CN106655822A (en) * | 2016-12-27 | 2017-05-10 | 上海新时达电气股份有限公司 | Frequency converter control circuit |
| CN107534288A (en) * | 2015-03-17 | 2018-01-02 | Abb瑞士股份有限公司 | Short-circuiting means for rectifier |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040179379A1 (en) * | 2001-10-25 | 2004-09-16 | Leo Nuutinen | Rectifying circuit |
| JP4363963B2 (en) * | 2003-11-27 | 2009-11-11 | 株式会社東芝 | Current balance controller for power semiconductors used in parallel |
| CN201976022U (en) * | 2010-12-15 | 2011-09-14 | 何林 | Three-phase group wave switch voltage regulator |
| CN104539175A (en) * | 2014-12-31 | 2015-04-22 | 中电博瑞技术（北京）有限公司 | AC/DC switching circuit based on hybrid parallel power devices |
| CN107534288A (en) * | 2015-03-17 | 2018-01-02 | Abb瑞士股份有限公司 | Short-circuiting means for rectifier |
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| CN106655822A (en) * | 2016-12-27 | 2017-05-10 | 上海新时达电气股份有限公司 | Frequency converter control circuit |
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| WO2024012022A1 (en) * | 2022-07-12 | 2024-01-18 | 深圳核心医疗科技股份有限公司 | Wireless charging rectifier circuit, wireless charging device and ventricular assist device |
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