CN114244174A - 380V auxiliary inverter power supply - Google Patents
380V auxiliary inverter power supply Download PDFInfo
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- CN114244174A CN114244174A CN202111567325.4A CN202111567325A CN114244174A CN 114244174 A CN114244174 A CN 114244174A CN 202111567325 A CN202111567325 A CN 202111567325A CN 114244174 A CN114244174 A CN 114244174A
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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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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
- H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53875—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with analogue control of three-phase output
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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
- H02H7/122—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 for inverters, i.e. dc/ac converters
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a 380V auxiliary inverter power supply, which relates to the technical field of auxiliary inverter power supplies and comprises a DC-DC conversion module, a main control module, a half-bridge inverter module, a full-bridge rectifier module, a first three-phase inverter module, a second three-phase inverter module and an alternating current filter module; the DC-DC conversion module is used for boosting and reducing voltage, the main control module is used for receiving and transmitting signals, the half-bridge inversion module is used for performing half-bridge inversion, the full-bridge rectification module is used for performing full-bridge rectification, the first three-phase inversion module and the second three-phase inversion module are used for realizing inversion, and the alternating current filtering module is used for processing output voltage. The 380V auxiliary inverter power supply performs voltage boosting and voltage reducing processing on the input voltage in a large range, so that the input direct-current power supply is at a rated voltage, the voltage stress of the power tubes during inversion is reduced, the using quantity of the high-voltage power tubes is reduced, the first three-phase inversion module and the second three-phase inversion module perform switching inversion work, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of auxiliary inverter power supplies, in particular to a 380V auxiliary inverter power supply.
Background
With the continuous development of power electronic technology and the continuous improvement of the control performance requirement of the industry on the auxiliary inverter power supply, the improvement and the improvement of the performance of the auxiliary inverter power supply are valued by people, so that the auxiliary inverter power supply continuously develops towards high frequency, high performance, parallel connection, modularization, miniaturization, input power factorization, digitalization and intellectualization, however, the input voltage of most of the conventional auxiliary inverter power supplies is specific direct current, the conventional auxiliary inverter power supply is convenient for converting the input power supply into 380V stable three-phase alternating current, the range of the input direct current voltage is not adjustable, the power supply is likely to be damaged due to overlarge voltage difference when the input direct current voltage jumps, and when the inverter in the conventional auxiliary inverter power supply is damaged, the auxiliary inverter power supply stops working to protect the auxiliary power supply, so that the auxiliary inverter power supply cannot continue to supply power to equipment, damage to other equipment may result.
Disclosure of Invention
The embodiment of the invention provides a 380V auxiliary inverter power supply to solve the problems in the background art.
In an embodiment of the present invention, there is provided a 380V auxiliary inverter power supply, including: the device comprises a direct current filtering module, a DC-DC conversion module, a circuit parameter detection module, a main control module, a protection module, a half-bridge inversion module, a full-bridge rectification module, a first three-phase inversion module, a second three-phase inversion module and an alternating current filtering module;
the direct current filtering module is used for filtering and outputting the input direct current voltage;
the DC-DC conversion module is used for performing boosting processing and voltage reduction processing on the direct-current voltage output by the direct-current filtering module;
the circuit parameter detection module is connected with the input end of the DC-DC conversion module, is used for detecting the power supply voltage input into the DC-DC conversion module, is connected with the output end of the DC-DC conversion module, is used for detecting the power supply voltage output by the DC-DC conversion module, is connected with the output end of the alternating current filtering module, is used for detecting the power supply voltage output by the alternating current filtering module, and is used for detecting the current signal output by the alternating current filtering module; the main control module is connected with the main control module and used for transmitting the detected parameter data to the main control module;
the main control module is used for receiving the parameter data detected by the circuit parameter detection module, analyzing and calculating the received parameter data through an internal software system, and outputting a driving signal and a control signal for controlling the work of each module;
the protection module is connected with the main control module, is used for receiving the control signal output by the main control module, is connected with the direct current filtering module and the DC-DC conversion module, and is used for controlling the direct current filtering module to be connected with the DC-DC conversion module;
the half-bridge inversion module is connected with the DC-DC conversion module and is used for inverting the DC voltage output by the DC-DC conversion module and outputting an alternating voltage;
the full-bridge rectification module is connected with the half-bridge inversion module and is used for rectifying the alternating current voltage output by the half-bridge inversion module into direct current voltage;
the first three-phase inversion module and the second three-phase inversion module are connected with the full-bridge rectification module, are used for receiving the direct-current voltage output by the full-bridge rectification module, are connected with the main control module, and are used for receiving the driving signal and inverting the direct-current voltage into alternating-current voltage;
and the alternating current filtering module is connected with the first three-phase inversion module and the second three-phase inversion module and is used for filtering alternating current voltages output by the first three-phase inversion module and the second three-phase inversion module.
Compared with the prior art, the invention has the beneficial effects that: the 380V auxiliary inverter power supply adopts the DC-DC conversion module to carry out voltage boosting and voltage reducing processing on the voltage in a larger range, so that the input direct-current power supply is at the rated voltage, the working efficiency of the 380V auxiliary inverter power supply is improved, the voltage stress of a power tube is reduced by adopting the half-bridge inversion module and the full-bridge rectification module during inversion, the using number of high-voltage power tubes is reduced, the cost is reduced, the first three-phase inversion module and the second three-phase inversion module are adopted for inversion, the shutdown caused by the damage of one three-phase inversion module is avoided, the inconvenience is brought to equipment needing the power supply, the 380V auxiliary inverter power supply also has the protection of undervoltage, overvoltage, overload, short circuit and overheating, and the safety and the reliability of the auxiliary inverter power supply are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic block diagram of a 380V auxiliary inverter according to an embodiment of the present invention.
Fig. 2 is a connection circuit diagram of a 380V auxiliary inverter power supply according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a DC-DC conversion module according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a circuit parameter detection module according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a protection module 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.
Example 1: referring to fig. 1, an embodiment of the present invention provides a 380V auxiliary inverter power supply, including: the device comprises a direct current filtering module 1, a DC-DC conversion module 2, a circuit parameter detection module 3, a main control module 4, a protection module 5, a half-bridge inversion module 6, a full-bridge rectification module 7, a first three-phase inversion module 8, a second three-phase inversion module 9 and an alternating current filtering module 10;
specifically, the dc filtering module 1 is configured to perform filtering processing on an input dc voltage and output the filtered dc voltage;
the DC-DC conversion module 2 is connected with the main control module 4 and is used for performing voltage boosting processing and voltage reducing processing on the direct-current voltage output by the direct-current filtering module 1;
a circuit parameter detection module 3, connected to an input terminal of the DC-DC conversion module 2, for detecting a power supply voltage input to the DC-DC conversion module 2, connected to an output terminal of the DC-DC conversion module 2, for detecting a power supply voltage output by the DC-DC conversion module 2, connected to an output terminal of the ac filtering module 10, for detecting a power supply voltage output by the ac filtering module 10, and for detecting a current signal output by the ac filtering module 10; the main control module 4 is connected with the main control module 4 and is used for transmitting the detected parameter data to the main control module 4;
the main control module 4 is used for receiving the parameter data detected by the circuit parameter detection module 3, analyzing and calculating the received parameter data through an internal software system, and outputting a driving signal and a control signal for controlling the work of each module;
the protection module 5 is connected with the main control module 4, is used for receiving the control signal output by the main control module 4, is connected with the direct current filtering module 1 and the DC-DC conversion module 2, and is used for controlling the connection of the direct current filtering module 1 and the DC-DC conversion module 2;
a half-bridge inversion module 6 connected to the DC-DC conversion module 2, for inverting the DC voltage output by the DC-DC conversion module 2 and outputting an ac voltage;
the full-bridge rectification module 7 is connected with the half-bridge inversion module 6 and is used for rectifying the alternating-current voltage output by the half-bridge inversion module 6 into direct-current voltage;
the first three-phase inversion module 8 and the second three-phase inversion module 9 are connected with the full-bridge rectification module 7, are used for receiving the direct-current voltage output by the full-bridge rectification module 7, are connected with the main control module 4, and are used for receiving the driving signal and inverting the direct-current voltage into alternating-current voltage;
and the alternating current filtering module 10 is connected with the first three-phase inversion module 8 and the second three-phase inversion module 9 and is used for filtering the alternating current voltage output by the first three-phase inversion module 8 and the second three-phase inversion module 9.
In a specific embodiment, the dc filtering module 1 may perform filtering processing on the input dc voltage by using a filter resistor and a filter capacitor, which is not described herein again; the DC-DC conversion module 2 may employ a voltage boost circuit and a voltage buck circuit to boost and buck the input DC voltage, wherein when the circuit parameter detection module 3 detects that the input DC voltage exceeds the rated voltage of the 380V auxiliary inverter, the voltage buck circuit operates, and when the input DC voltage is lower than the rated voltage, the voltage boost circuit operates to keep the input DC constant voltage at the rated voltage; the circuit parameter detection module 3 can respectively perform voltage detection and current detection on the power supply by adopting a resistance voltage division mode, a voltage transformer and a current transformer, which are not described herein again; the main control module 4 can adopt a digital signal processing chip (DSP) to analyze and calculate input parameter data, and output a driving signal and a control signal through an internal software system, and the protection module 5 can realize undervoltage protection, overvoltage protection, overload protection, short-circuit protection, and overheat protection through a related software program, and achieve a protection effect through connection control of the DC filter module 1 and the DC-DC conversion module 2; the half-bridge inverter module 6 can perform DC-AC conversion by adopting a half-bridge inverter circuit; the full-bridge rectification module 7 can adopt two uncontrollable diode full-bridge rectification circuits for rectification; the first three-phase inversion module 8 and the second three-phase inversion module 9 both adopt three-phase inversion devices, which are not described herein; the ac filtering module 10 may use an LC filter circuit to implement the filtering process on the ac voltage.
Example 2: based on embodiment 1, referring to fig. 2, in an embodiment of the 380V auxiliary inverter power supply according to the present invention, the half-bridge inverter module 6 includes a first capacitor C1, a second capacitor C2, a first resistor R1, a second resistor R2, a first power transistor VT1, and a second power transistor VT 2; the main control module 4 comprises a first controller U1;
a first end of the first capacitor C1 is connected to the first output end of the DC-DC conversion module 2, one end of the first resistor R1 and a collector of the first power transistor VT1, one end of the second capacitor C2 is connected to the second output end of the DC-DC conversion module 2, one end of the second resistor R2 and an emitter of the second power transistor VT2, a second end of the first capacitor C1 is connected to the other end of the second capacitor C2, the other end of the first resistor R1 and the other end of the second resistor R2, the emitter of the first power transistor VT1 is connected to the collector of the second power transistor VT2, and a gate of the first power transistor VT1 and a gate of the second power transistor VT2 are respectively connected to the first IO end and the second IO end of the first controller U1.
Further, the full-bridge rectification module 7 includes a first transformer W1, a first rectifier G1, and a second rectifier G2; the first three-phase inversion module 8 comprises a first three-phase inversion device J1; the second three-phase inversion module 9 comprises a second three-phase inversion device J2;
a first end of a first transformer W1 is connected to an emitter of the first power transistor VT1, a second end of a first transformer W1 is connected to a second end of the first capacitor C1, a third end of the first transformer W1 is connected to a first end of a first rectifier G1, a fourth end of a first transformer W1 is connected to a third end of a first rectifier G1, a fourth end of the first rectifier G1 is connected to a second end of a second rectifier G2, a fifth end and a sixth end of the first transformer W1 are respectively connected to a first end and a third end of a second rectifier G2, a second end of the first rectifier G1 is connected to a first input end of the first three-phase inverter J1 and a first input end of the second three-phase inverter J2, a fourth end of the second rectifier G2 is connected to a second input end of the first three-phase inverter J1 and a second input end of the second three-phase inverter J2, a third control end of the first three-phase inverter J1 and a third control end of the second inverter J2 are respectively connected to a third input end of the fourth control IO device 1.
Further, the ac filtering module 10 includes a first inductor L1, a second inductor L2, a third inductor L3, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5;
specifically, one end of the first inductor L1 is connected to the first output end of the first three-phase inverter J1 and the first output end of the second three-phase inverter J2, one end of the second inductor L2 is connected to the second output end of the first three-phase inverter J1 and the second output end of the second three-phase inverter J2, one end of the third inductor L3 is connected to the third output end of the first three-phase inverter J1 and the third output end of the second three-phase inverter J2, the other end of the first inductor L1 is connected to one end of the fifth capacitor C5 and one end of the fourth capacitor C4, the other end of the second inductor L2 is connected to the other end of the fifth capacitor C5 and the other end of the third capacitor C3, and the other end of the third inductor L3 is connected to the other end of the fourth capacitor C4 and the other end of the third capacitor C3.
In a specific embodiment, the first power transistor VT1 and the second power transistor VT2 may employ an Insulated Gate Bipolar Transistor (IGBT); the first controller U1 may employ a TPS5602IDBT digital signal processing chip; the first rectifier G1 and the second rectifier G2 may both be diode full bridge rectifiers.
Example 3: based on embodiment 2, referring to fig. 3, fig. 4 and fig. 5, in an embodiment of the 380V auxiliary inverter according to the present invention, as shown in fig. 3, the DC-DC conversion module 2 includes a voltage boosting unit 201 and a voltage dropping unit 202;
the boosting unit 201 is configured to boost the dc voltage output by the dc filtering module 1;
the voltage reduction unit 202 is configured to perform voltage reduction processing on the dc voltage output by the dc filter module 1;
the control end of the voltage boosting unit 201 and the control end of the voltage reducing unit 202 are both connected with the main control module 4, the input end of the voltage boosting unit 201 is connected with the input end of the voltage reducing unit 202, and the output end of the voltage boosting unit 201 is connected with the output end of the voltage reducing unit 202.
In a specific embodiment, the Boost circuit may adopt, but is not limited to, a transformer, a Boost circuit, and other Boost devices to implement Boost processing on an input dc power supply; the voltage reduction circuit can adopt, but is not limited to, a transformer, a Buck circuit and other voltage reduction devices to realize voltage reduction processing of the input direct current power supply.
Further, as shown in fig. 4, the circuit parameter detecting module 3 includes a first voltage detecting unit 301, a second voltage detecting unit 302, a third voltage detecting unit 303, and a current detecting unit 304;
specifically, the first voltage detection unit 301 is configured to detect a power supply voltage input to the DC-DC conversion module 2;
a second voltage detection unit 302 for detecting the power supply voltage output by the DC-DC conversion module 2;
a third voltage detection unit 303, configured to detect a power supply voltage output by the ac filtering module 10;
a current detection unit 304, configured to detect a current signal output by the ac filtering module 10;
one end of the first voltage detection unit 301, one end of the second voltage detection unit 302, one end of the third voltage detection unit 303, and one end of the current detection unit 304 are all connected to the main control module 4, the other end of the first voltage detection unit 301 is connected to the input end of the DC-DC conversion module 2, the other end of the second voltage detection unit 302 is connected to the output end of the DC-DC conversion module 2, and the other end of the third voltage detection unit 303 and the other end of the current detection unit 304 are all connected to the output end of the ac filter module 10.
In a specific embodiment, the first voltage detection unit 301, the second voltage detection unit 302, and the third voltage detection unit 303 may use, but are not limited to, a resistance voltage division method, a voltage detection device such as a voltage transformer, etc. to perform voltage detection; the current detection unit 304 may detect current by using a current detection device such as, but not limited to, a current transformer.
Further, as shown in fig. 5, the protection module 5 includes an under-voltage protection unit 501, an over-voltage protection unit 502, an overload protection unit 503, a short-circuit protection unit 504, and an over-temperature protection unit 505;
specifically, the under-voltage protection unit 501 is configured to perform output under-voltage protection through an under-voltage program;
an overvoltage protection unit 502 for performing output overvoltage protection through an overvoltage program;
an overload protection unit 503, configured to perform output overload protection through an overload program;
a short-circuit protection unit 504 for performing output short-circuit protection by a short-circuit program;
an overheat protection unit 505 for performing power overheat protection through an overheat program;
the undervoltage protection unit 501, the overvoltage protection unit 502, the overload protection unit 503, the short-circuit protection unit 504, and the overheat protection unit 505 are all connected to the main control module 4.
In a specific embodiment, the undervoltage protection unit 501, the overvoltage protection unit 502, the overload protection unit 503, the short-circuit protection unit 504, and the overheat protection unit 505 may respectively adopt an undervoltage protection circuit, an overvoltage protection circuit, an overload protection circuit, a short-circuit protection circuit, and an overheat protection circuit, so as to respectively implement output undervoltage protection, output overvoltage protection, output overload protection, output short-circuit protection, and power supply overheat protection for the 380V auxiliary inverter power supply, which is not described herein in detail.
The 380V auxiliary inverter power supply adopts the voltage boosting unit 201 and the voltage reducing unit 202 in the DC-DC conversion module 2 to respectively perform voltage boosting and voltage reducing processing on the input voltage in a larger range, so that the input direct current power supply is at a rated voltage, the efficiency of the 380V auxiliary inverter power supply during working is improved, the voltage stress of a power tube during inversion is reduced by adopting the half-bridge inversion module 6 and the full-bridge rectification module 7, the using quantity of high-voltage power tubes is reduced, the cost is reduced, the voltage stress of a diode is reduced by adopting the full-bridge rectification module 7 in a double-rectification mode, the burden caused by overhigh voltage is avoided, and inversion working is performed by the first three-phase inversion module 8 and the second three-phase inversion module 9, wherein the first three-phase inversion module 8 and the second three-phase inversion module 9 are both subjected to switching control by the main control module 4, and after one of the three-phase inversion modules is damaged, the main control module 4 switches the inversion work to another module to be carried out, so that the shutdown caused by the damage of one-way three-phase inversion module is avoided, inconvenience is brought to equipment needing a power supply, and the 380V auxiliary inversion power supply detects the input and output voltage and current through the circuit parameter detection module 3, so that undervoltage, overvoltage, overload, short circuit and overheating protection are carried out according to an internal software system, and the safety and reliability of the auxiliary inversion power supply are improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A380V auxiliary inverter power supply is characterized in that:
the 380V auxiliary inverter power supply comprises: the device comprises a direct current filtering module, a DC-DC conversion module, a circuit parameter detection module, a main control module, a protection module, a half-bridge inversion module, a full-bridge rectification module, a first three-phase inversion module, a second three-phase inversion module and an alternating current filtering module;
the direct current filtering module is used for filtering and outputting the input direct current voltage;
the DC-DC conversion module is used for performing boosting processing and voltage reduction processing on the direct-current voltage output by the direct-current filtering module;
the circuit parameter detection module is connected with the input end of the DC-DC conversion module, is used for detecting the power supply voltage input into the DC-DC conversion module, is connected with the output end of the DC-DC conversion module, is used for detecting the power supply voltage output by the DC-DC conversion module, is connected with the output end of the alternating current filtering module, is used for detecting the power supply voltage output by the alternating current filtering module, and is used for detecting the current signal output by the alternating current filtering module; the main control module is connected with the main control module and used for transmitting the detected parameter data to the main control module;
the main control module is used for receiving the parameter data detected by the circuit parameter detection module, analyzing and calculating the received parameter data through an internal software system, and outputting a driving signal and a control signal for controlling the work of each module;
the protection module is connected with the main control module, is used for receiving the control signal output by the main control module, is connected with the direct current filtering module and the DC-DC conversion module, and is used for controlling the direct current filtering module to be connected with the DC-DC conversion module;
the half-bridge inversion module is connected with the DC-DC conversion module and is used for inverting the DC voltage output by the DC-DC conversion module and outputting an alternating voltage;
the full-bridge rectification module is connected with the half-bridge inversion module and is used for rectifying the alternating current voltage output by the half-bridge inversion module into direct current voltage;
the first three-phase inversion module and the second three-phase inversion module are connected with the full-bridge rectification module, are used for receiving the direct-current voltage output by the full-bridge rectification module, are connected with the main control module, and are used for receiving the driving signal and inverting the direct-current voltage into alternating-current voltage;
and the alternating current filtering module is connected with the first three-phase inversion module and the second three-phase inversion module and is used for filtering alternating current voltages output by the first three-phase inversion module and the second three-phase inversion module.
2. The 380V auxiliary inverter according to claim 1, wherein the DC-DC conversion module comprises a voltage boosting unit and a voltage dropping unit;
the boosting unit is used for boosting the direct-current voltage output by the direct-current filtering module;
the voltage reduction unit is used for reducing the direct-current voltage output by the direct-current filtering module;
the control end of the voltage boosting unit and the control end of the voltage reducing unit are both connected with the main control module, the input end of the voltage boosting unit is connected with the input end of the voltage reducing unit, and the output end of the voltage boosting unit is connected with the output end of the voltage reducing unit.
3. The 380V auxiliary inverter according to claim 1, wherein the half-bridge inverter module comprises a first capacitor, a second capacitor, a first resistor, a second resistor, a first power transistor, and a second power transistor; the main control module comprises a first controller;
the first end of the first capacitor is connected with the first output end of the DC-DC conversion module, one end of the first resistor and the collector of the first power tube, one end of the second capacitor is connected with the second output end of the DC-DC conversion module, one end of the second resistor and the emitter of the second power tube, the second end of the first capacitor is connected with the other end of the second capacitor, the other end of the first resistor and the other end of the second resistor, the emitter of the first power tube is connected with the collector of the second power tube, and the grid of the first power tube and the grid of the second power tube are respectively connected with the first IO end and the second IO end of the first controller.
4. The 380V auxiliary inverter according to claim 3, wherein the full-bridge rectification module comprises a first transformer, a first rectifier and a second rectifier; the first three-phase inversion module comprises a first three-phase inversion device; the second three-phase inversion module comprises a second three-phase inversion device;
the first end of the first transformer is connected with the emitter of the first power tube, the second end of the first transformer is connected with the second end of the first capacitor, the third end of the first transformer is connected with the first end of the first rectifier, the fourth end of the first transformer is connected with the third end of the first rectifier, the fourth end of the first rectifier is connected with the second end of the second rectifier, the fifth end and the sixth end of the first transformer are respectively connected with the first end and the third end of the second rectifier, the second end of the first rectifier is connected with the first input end of the first three-phase inverter and the first input end of the second three-phase inverter, the fourth end of the second rectifier is connected with the second input end of the first three-phase inverter and the second input end of the second three-phase inverter, and the control end of the first three-phase inverter and the control end of the second three-phase inverter are respectively connected with the third IO end and the fourth IO end of the first controller.
5. The 380V auxiliary inverter according to claim 1, wherein the circuit parameter detecting module comprises a first voltage detecting unit, a second voltage detecting unit, a third voltage detecting unit, a current detecting unit;
the first voltage detection unit is used for detecting the power supply voltage input into the DC-DC conversion module;
the second voltage detection unit is used for detecting the power supply voltage output by the DC-DC conversion module;
the third voltage detection unit is used for detecting the power supply voltage output by the alternating current filtering module;
the current detection unit is used for detecting a current signal output by the alternating current filtering module;
one end of the first voltage detection unit, one end of the second voltage detection unit, one end of the third voltage detection unit and one end of the current detection unit are all connected with the main control module, the other end of the first voltage detection unit is connected with the input end of the DC-DC conversion module, the other end of the second voltage detection unit is connected with the output end of the DC-DC conversion module, and the other end of the third voltage detection unit and the other end of the current detection unit are all connected with the output end of the alternating current filter module.
6. The 380V auxiliary inverter power supply according to claim 1, wherein the protection module comprises an under-voltage protection unit, an over-voltage protection unit, an overload protection unit, a short-circuit protection unit, and an over-temperature protection unit;
the undervoltage protection unit is used for outputting undervoltage protection through an undervoltage program;
the overvoltage protection unit is used for performing output overvoltage protection through an overvoltage program;
the overload protection unit is used for carrying out output overload protection through an overload program;
the short-circuit protection unit is used for carrying out output short-circuit protection through a short-circuit program;
the overheating protection unit is used for performing power supply overheating protection through an overheating program;
the undervoltage protection unit, the overvoltage protection unit, the overload protection unit, the short-circuit protection unit and the overheat protection unit are all connected with the main control module.
7. The 380V auxiliary inverter according to claim 4, wherein the ac filtering module comprises a first inductor, a second inductor, a third capacitor, a fourth capacitor and a fifth capacitor;
one end of the first inductor is connected with a first output end of the first three-phase inverter and a first output end of the second three-phase inverter, one end of the second inductor is connected with a second output end of the first three-phase inverter and a second output end of the second three-phase inverter, one end of the third inductor is connected with a third output end of the first three-phase inverter and a third output end of the second three-phase inverter, the other end of the first inductor is connected with one end of the fifth capacitor and one end of the fourth capacitor, the other end of the second inductor is connected with the other end of the fifth capacitor and the other end of the third capacitor, and the other end of the third inductor is connected with the other end of the fourth capacitor and the other end of the third capacitor.
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| WO2024103019A1 (en) * | 2022-11-11 | 2024-05-16 | Cummins Power Generation Inc. | Pantograph bounce logic |
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