CN110022053B - Three-phase rectification protection circuit with input surge current suppression function - Google Patents
Three-phase rectification protection circuit with input surge current suppression function Download PDFInfo
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- CN110022053B CN110022053B CN201910250284.2A CN201910250284A CN110022053B CN 110022053 B CN110022053 B CN 110022053B CN 201910250284 A CN201910250284 A CN 201910250284A CN 110022053 B CN110022053 B CN 110022053B
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- 230000001629 suppression Effects 0.000 title claims abstract description 49
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000004804 winding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000001052 transient effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 2
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M7/21—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 triode or transistor type requiring continuous application of a control signal
- H02M7/217—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/2173—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a biphase or polyphase circuit arrangement
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The invention discloses a three-phase rectification protection circuit with an input surge current suppression function, which can solve the technical problem that the existing rectification circuit unit cannot suppress the input surge current. The device comprises an input filter circuit, an input surge current suppression circuit, a transformer, a rectification output circuit and a monitoring and control circuit which are connected in sequence; the input surge current suppression circuit comprises a main contactor K101 and a relay K102, wherein the main contactor K101 is provided with three groups of normally open contacts for connecting an input three-phase power supply end U, V, W and three-phase power supply ends U1, V1 and W1 of a later stage, and the relay K102 is provided with four groups of normally open contacts, wherein the three groups are respectively connected with a surge current suppression resistor, and the other group is used for controlling the main contactor K101 to supply power; the control signal of the monitoring and control circuit is connected in series with the triode V103 through the R104 and used for controlling the relay K102 to supply power; the invention is an excellent three-phase power supply circuit integrating the input surge current restraining and protecting functions, and has simple principle, high reliability and excellent performance.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a three-phase rectification protection circuit with an input surge current suppression function.
Background
With the social progress and the continuous update and development of power supply technology, the requirements for high-quality power supply are increasing, and therefore, the requirements for the functions and performances of the power supply serving as a power conversion core are also increasing. Because the power system adopts alternating current for transmission, the rectification power supply inevitably becomes an indispensable unit or part in the electric energy conversion power supply, and the application range of the rectification power supply is wider and wider, thereby playing an important role in a plurality of fields such as military, medical treatment, traffic, industrial production and the like. In the field of military radars, the rectifying power supply is applied more frequently along with the continuous increase of the power of the radars, so that the requirements on the reliability, the safety, the technical performance and the like of the rectifying power supply are more strict. Therefore, the rectification power supply in the military radar power supply application is indispensable to have the requirements of protecting and shutting down the input surge current limit and the power supply work abnormality.
In general, the rectifying circuit unit only appears as a part or unit in the converted power supply, so that the requirements of suppressing and protecting the input surge current can be realized by processing at the rectifying rear end; however, with the increasing power of electric equipment, especially the requirements of military radar arrays on weight are more and more strict, so that the rectifying circuit part must be independently designed into a rectifying power supply meeting the power supply requirements. As a separate rectifying power supply, it is necessary to have an input surge current suppressing function, various perfect fault protection shutdown functions, and the like independently.
Disclosure of Invention
The three-phase rectification protection circuit with the input surge current suppression function can solve the technical problem that an existing rectification circuit unit cannot suppress input surge current and cannot be used as an independent rectification power supply.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the three-phase rectification protection circuit with the input surge current suppression function comprises an input filter circuit, a transformer and a rectification output circuit thereof, and also comprises an input surge current suppression protection circuit, an auxiliary power circuit and a monitoring and control circuit;
the input filter circuit, the input surge current suppression circuit, the transformer, the rectification output circuit and the monitoring and control circuit are connected in sequence;
set U, V and W come from three-phase input after input filter, U1, V1 and W1 are three-phase input as transformer after input surge suppression protection circuit;
the main contactor K101 is provided with three groups of normally open contacts for connecting an input three-phase power supply end U, V, W and three-phase power supply ends U1, V1 and W1 of a rear stage, the relay K102 is provided with four groups of normally open contacts, wherein the three groups are respectively connected with surge current suppression resistors, and the other group is connected with a coil winding of the main contactor K101 to control coil power supply of the main contactor K101;
the control signal of the monitoring and control circuit is connected to a triode V103 through a series R104, and the triode V103 is connected with a coil winding of the relay K102 to control the relay K102 to supply power;
the auxiliary power supply circuit supplies power to the main contactor K101, the relay K102 and the monitoring and control circuit respectively.
Further, the transistor further comprises a control resistor R105, wherein the R105 is connected between the base electrode and the emitter electrode of the triode V103.
Further, the coil winding of the contactor K101 is connected in series with a transient suppression diode V101.
Further, the coil winding of the relay K102 is connected in series with a transient suppression diode V102.
Further, the input end of the input filter circuit is provided with a fuse.
Further, the auxiliary power supply circuit is an AC/DC auxiliary power supply circuit, and the input of the auxiliary power supply circuit takes power from the front end of the input surge current suppression circuit.
Further, the input end of the auxiliary power supply circuit is provided with a fuse.
According to the technical scheme, the three-phase rectification protection circuit with the input surge current suppression function can achieve the input surge current suppression function and the three-phase rectification protection function. The circuit is an excellent three-phase power supply circuit integrating input surge current suppression and protection functions, has simple principle, high reliability and excellent performance, and provides a feasible scheme for related applications.
Drawings
FIG. 1 is a schematic diagram of a rectified power circuit of the present invention;
fig. 2 is a three-phase rectifying and protecting circuit with input surge current suppression according to the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
As can be seen from the schematic circuit diagram shown in fig. 1, the rectifying power supply mainly comprises an input filter circuit, an auxiliary power circuit, a transformer, a rectifying output circuit, a monitoring and controlling circuit and an input surge current suppressing and fault protecting circuit. The input surge current suppression and fault protection circuit is composed of a contactor K101, a relay K102 and peripheral circuits. The following describes the respective components of the rectified power supply.
An input filter circuit section: the input filter circuit can be realized by designing a proper three-phase power supply filter according to the electromagnetic compatibility requirement of the rectification power supply, and the input specification of the input filter circuit can also be adapted according to the requirement of the rectification power supply, such as 380V50Hz or 115V400Hz. The application of the input fuses F101, F102 and F103 is mainly for preventing the input filter circuit from malfunctioning or preventing the damage of the devices at the later stage of the rectifying power supply caused by the overlarge input current of the rectifying power supply, and proper fuse specifications can be selected according to requirements.
An auxiliary power supply circuit section: the control circuit is used for supplying power to the detection and control circuit of the rectification power supply and is used for controlling the relay and the contactor. The part can select proper output voltage according to the auxiliary power consumption specification, and can also be realized by adopting single-phase AC/DC or three-phase AC/DC according to the input form. It is worth noting that the input of the auxiliary power supply must take power from the front end of the input surge current suppression and protection circuit, otherwise, the rectified power supply cannot perform starting operation when the auxiliary power supply is not used. The fuses F201, F202 and F203 at the input end are used for protecting measures under the abnormal condition of the auxiliary power supply, and appropriate specifications can be selected according to requirements.
Transformer and rectification output circuit part thereof: the transformer and the rectifying output circuit are used for realizing the conversion from alternating current to direct current output, wherein the transformer can adopt an isolation mode or a non-isolation mode according to the performance requirement of a rectifying power supply, and can also be realized by selecting a transformer with multiple pulses, such as 18 pulses, according to the requirements of harmonic waves and power factors. In addition, according to the detection control requirement of the rectifying power supply, the detection sensing device of the output voltage and the output current is required to be correspondingly configured, so that the protection under abnormal conditions is facilitated.
Monitoring and control circuit part: the part is used for controlling the on-off of the rectifying power supply, detecting the input and output of the rectifying power supply and the temperature information thereof, and is used for the power supply protection under abnormal conditions and the function of reporting the working state thereof. Remote control operation and monitoring can be realized through communication transmission, and convenience is brought to power supply application.
Input surge current suppression and fault protection circuit portion: the three-phase rectifying power supply input surge current suppression and fault protection key part is realized by adopting a mode that a relay is matched with a contactor for use, and the working principle of the part is analyzed in detail as follows:
as is clear from the three-phase rectifying protection circuit with input surge current suppression shown in fig. 2, this part of the circuit is composed of a main contactor K101, a relay K102, input surge current suppression resistors R101, R102 and R103, control parts R104, R105 and V103, transient suppression diodes V101 and V102 of the contactor and relay coil, and a 24V power supply for supplying power to the coil. Wherein 24V comes from the output of the auxiliary power supply, the Ctrl signal of startup and protection control comes from the monitoring and control circuit part, U, V and W come from the three-phase input after being input into the filter, and U1, V1 and W1 are the three-phase input as a transformer after being input into the surge suppression and protection circuit.
And (3) analyzing the working principle of a circuit: the relay K102 is provided with four groups of normally open contacts, wherein three groups of normally open contacts are connected with the surge current suppression resistor, and the other groups of normally open contacts are connected with a coil winding of the main contactor to control the coil power supply of the main contactor; the main contactor has three sets of normally open contacts for connecting the input three-phase power supply terminal U, V, W and the three-phase power supply terminals U1, V1, and W1 of the subsequent stage, as shown in fig. 2. After the rectifying power supply is electrified, the auxiliary power supply starts working first to establish 24V output to supply power for the monitoring control circuit, when the monitoring control circuit gives a starting signal Ctrl, the triode V103 is conducted to enable coil power supply of the relay K102 to be established, thereby enabling four groups of contacts of the relay K102 to be attracted, enabling coil power supply of the contactor K101 to be established, and finally enabling three groups of main contacts of the contactor K101 to be attracted to enable the rectifying power supply to complete the starting process and enter a normal working state. The starting buffering process of the input surge current suppression is mainly realized in the action time of the contactor K101 (the suction time of the contactor is generally tens of milliseconds), and in the process, the relay K102 is already sucked, so that the input current can charge the capacitor at the rectification rear end through the surge current suppression resistors R101, R102 and R103 by the relay K102 in the starting process; the aim of suppressing the input surge current can be achieved by reasonably selecting the resistance values and specifications of the current suppressing resistors R101, R102 and R103 according to the suction time of the selected contactor K101. When the rectifying power supply detects that a fault condition needing protection occurs, the monitoring control circuit gives a shutdown signal Ctrl to enable the triode V103 to be turned off, so that the contact of the relay K102 is released, the contact of the contactor K101 is released, and finally the three-phase input U, V, W is completely disconnected with the inputs U1, V1 and W1 of the transformer, so that the shutdown protection function of the rectifying circuit is realized. Therefore, the circuit can integrate the input surge current suppression and three-phase rectification protection functions.
Through the principle analysis, the circuit can realize the input surge current suppression function and the three-phase rectification protection function. In order to verify the practical application effect of the circuit, the circuit is applied to a rectification power supply powered by an airborne radar, and various functions are tested and long-term work verification is carried out. The circuit is proved to have excellent performance in both input surge current suppression and fault protection by using verification conditions. Therefore, the circuit is an excellent three-phase power supply circuit integrating input surge current suppression and protection functions, has simple principle, high reliability and excellent performance, and provides a feasible scheme for related applications.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a take input surge current suppression function's three-phase rectification protection circuit, includes input filter circuit, transformer and rectification output circuit thereof, its characterized in that: the device also comprises an input surge current suppression protection circuit, an auxiliary power circuit and a monitoring and control circuit;
the input filter circuit, the input surge current suppression circuit, the transformer, the rectification output circuit and the monitoring and control circuit are connected in sequence;
the input surge current suppression circuit comprises a main contactor K101 and a relay K102, wherein the main contactor K101 is provided with three groups of normally open contacts for connecting an input three-phase power supply end U, V, W and three-phase power supply ends U1, V1 and W1 of a later stage, the relay K102 is provided with four groups of normally open contacts, the three groups of normally open contacts are respectively connected with a surge current suppression resistor, and the other group of normally open contacts are connected with a coil winding of the main contactor K101 to control coil power supply of the main contactor K101;
the control signal of the monitoring and control circuit is connected to a triode V103 through a series R104, and the triode V103 is connected with a coil winding of the relay K102 to control the relay K102 to supply power;
the auxiliary power supply circuit supplies power to the main contactor K101, the relay K102 and the monitoring and control circuit respectively;
after the rectifying power supply is electrified, the auxiliary power supply starts working first to establish 24V output to supply power for the monitoring control circuit, when the monitoring control circuit gives a starting signal Ctrl, the triode V103 is conducted to enable coil power supply of the relay K102 to be established, four groups of contacts of the relay K102 are attracted to enable coil power supply of the contactor K101 to be established, and three groups of main contacts of the contactor K101 are attracted to enable the rectifying power supply to complete the starting process to enter a normal working state.
2. The three-phase rectification protection circuit with an input surge current suppression function according to claim 1, wherein:
one end of the resistor R105 is connected to the base electrode of the triode V103, and the other end of the resistor R105 is connected to the emitter electrode of the triode V103, so that the triode V103 can be reliably turned on and off under the action of a control signal.
3. The three-phase rectification protection circuit with an input surge current suppression function according to claim 1, wherein: the coil winding of the main contactor K101 is connected in series with a transient suppression diode V101.
4. The three-phase rectification protection circuit with an input surge current suppression function according to claim 1, wherein: the coil winding of the relay K102 is connected in series with a transient suppression diode V102.
5. The three-phase rectification protection circuit with an input surge current suppression function according to claim 1, wherein: and the input end of the input filter circuit is provided with a fuse.
6. The three-phase rectification protection circuit with an input surge current suppression function according to claim 1, wherein: the auxiliary power supply circuit is an AC/DC auxiliary power supply circuit, and the input of the auxiliary power supply circuit takes power from the front end of the input surge current suppression circuit.
7. The three-phase rectification protection circuit with input surge current suppression function according to claim 6, wherein: and the input end of the auxiliary power supply circuit is provided with a fuse.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910250284.2A CN110022053B (en) | 2019-03-29 | 2019-03-29 | Three-phase rectification protection circuit with input surge current suppression function |
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| CN201910250284.2A CN110022053B (en) | 2019-03-29 | 2019-03-29 | Three-phase rectification protection circuit with input surge current suppression function |
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| CN110022053A CN110022053A (en) | 2019-07-16 |
| CN110022053B true CN110022053B (en) | 2024-03-29 |
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| CN109217273A (en) * | 2018-11-20 | 2019-01-15 | 艾乐德电子（南京）有限公司 | One kind turning off the power switch undelayed anti-surge circuit |
| CN209748404U (en) * | 2019-03-29 | 2019-12-06 | 合肥华耀电子工业有限公司 | Three-phase rectification protection circuit with input surge current suppression function |
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| Publication number | Publication date |
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| CN110022053A (en) | 2019-07-16 |
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