CN115378280A - Three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply - Google Patents

Three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply Download PDF

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Publication number
CN115378280A
CN115378280A CN202211019325.5A CN202211019325A CN115378280A CN 115378280 A CN115378280 A CN 115378280A CN 202211019325 A CN202211019325 A CN 202211019325A CN 115378280 A CN115378280 A CN 115378280A
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Prior art keywords
transistor
module
phase
output port
output
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CN202211019325.5A
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Chinese (zh)
Inventor
刘湘
罗万里
陈文军
何涛
李松睿
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Hunan Fullde Electric Co Ltd
Guangdong Fullde Electronics Co Ltd
Zhuzhou Fullde Rail Transit Research Institute Co Ltd
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Hunan Fullde Electric Co Ltd
Guangdong Fullde Electronics Co Ltd
Zhuzhou Fullde Rail Transit Research Institute Co Ltd
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Application filed by Hunan Fullde Electric Co Ltd, Guangdong Fullde Electronics Co Ltd, Zhuzhou Fullde Rail Transit Research Institute Co Ltd filed Critical Hunan Fullde Electric Co Ltd
Priority to CN202211019325.5A priority Critical patent/CN115378280A/en
Publication of CN115378280A publication Critical patent/CN115378280A/en
Pending legal-status Critical Current

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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
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
    • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
    • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
    • 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
    • H02M1/12—Arrangements for reducing harmonics from ac input or output

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rectifiers (AREA)

Abstract

The invention relates to the technical field of power supplies, in particular to a three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply which comprises a main control module, an input port, a three-phase controllable rectification module, a BUCK module, an inversion module, a first output port, a second output port, a third output port and a fourth output port, wherein the main control module is connected with the input port; the inversion module comprises a first inversion module, a second inversion module, a third inversion module and a fourth inversion module. According to the invention, four groups of inversion modules and four output ports are arranged, so that self-adaptive self-service output selection can be realized according to the wiring of a user, and meanwhile, the switching of single-phase power and three-phase power can be realized seamlessly and rapidly; in addition, by arranging the BUCK module, the output harmonic wave of the system can be effectively reduced.

Description

Three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply
Technical Field
The invention relates to the technical field of power supplies, in particular to a three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply.
Background
At present, the requirement of providing an adjustable alternating current power supply for test equipment can meet the requirements of both three-phase power supply output and single-phase power supply output, and the two output modes are not used simultaneously; the power requirement power of the variable frequency power supply is 500kVA, and the three-phase output voltage range is as follows: AC30V to AC630V, single-phase output voltage range: AC 20V-AC 800V; frequency output range three-phase output: 30 Hz-120 Hz, single-phase output: 50Hz, 60Hz.
In order to realize the functions, an alternating current variable frequency power supply appears on the market at present, as shown in fig. 1, the three-phase part of the scheme directly adopts a 2MW wind power converter 1 to complete the function of a three-phase alternating current power supply, a single-phase output part obtains electricity from a PWM (pulse width modulation) rectification part of the wind power converter, and then the electricity is inverted through a 2MW single-phase inversion module 2. The whole power supply mainly comprises a 2MW wind power converter 1, a 2MW single-phase inversion module 2, a single-phase isolation transformer 4, a three-phase isolation transformer 3 and the like.
The scheme realizes single-phase and three-phase output, but the single-phase and the three-phase are independent, a complete self-adaptive scheme is not realized, simultaneously, the cost is greatly increased, the control is complicated, the number of control ports is increased, and the output harmonic ratio of the system is larger when the output voltage is lower.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply.
The purpose of the invention is realized by the following technical scheme: a three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply comprises a main control module, an input port, a three-phase controllable rectification module, a BUCK module, an inversion module, a first output port, a second output port, a third output port and a fourth output port; the inversion module comprises a first inversion module, a second inversion module, a third inversion module and a fourth inversion module;
the input end of the three-phase controllable rectifying module is connected with the input port; the output end of the three-phase controllable rectifying module is connected with the input end of the BUCK module; the input end of the first inversion module, the input end of the second inversion module, the input end of the third inversion module and the input end of the fourth inversion module are respectively connected with the output end of the BUCK module; the output end of the first inversion module, the output end of the second inversion module, the output end of the third inversion module and the output end of the fourth inversion module are respectively connected with the first output port, the second output port, the third output port and the fourth output port.
The invention is further provided that the first inversion module comprises a transistor IGBT9, a transistor IGBT10 and an inductor L5; the drain electrode of the transistor IGBT9 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT9 and the grid electrode of the transistor IGBT10 are respectively connected with the main control module; the source electrode of the transistor IGBT9 is connected with the drain electrode of the transistor IGBT 10; the source electrode of the transistor IGBT9 is connected with the first output port through an inductor L5;
the second inversion module comprises a transistor IGBT11, a transistor IGBT12 and an inductor L6; the drain electrode of the transistor IGBT11 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT11 and the grid electrode of the transistor IGBT12 are respectively connected with the main control module; the source electrode of the transistor IGBT11 is connected with the drain electrode of the transistor IGBT 12; the source electrode of the transistor IGBT11 is connected with a second output port through an inductor L6;
the first inversion module comprises a transistor IGBT13, a transistor IGBT14 and an inductor L7; the drain electrode of the transistor IGBT13 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT13 and the grid electrode of the transistor IGBT14 are respectively connected with the main control module; the source electrode of the transistor IGBT13 is connected with the drain electrode of the transistor IGBT 14; the source electrode of the transistor IGBT13 is connected with a third output port through an inductor L7;
the first inversion module comprises a transistor IGBT15, a transistor IGBT16 and an inductor L8; the drain electrode of the transistor IGBT15 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT15 and the grid electrode of the transistor IGBT16 are respectively connected with the main control module; the source electrode of the transistor IGBT15 is connected with the drain electrode of the transistor IGBT 16; the source electrode of the transistor IGBT15 is connected with a fourth output port through an inductor L8;
the source of the transistor IGBT10, the source of the transistor IGBT12, the source of the transistor IGBT14 and the source of the transistor IGBT16 are connected to each other.
The invention is further arranged that a capacitor C6 is arranged between the first output port and the second output port; a capacitor C7 is arranged between the second output port and the third output port; a capacitor C8 is arranged between the first output port and the third output port; and a capacitor C3, a capacitor C4 and a capacitor C5 are arranged between the fourth output port and the first output port, between the fourth output port and the second output port and between the fourth output port and the third output port.
The invention is further provided that the three-phase controllable rectifier module comprises a transistor IGBT1, a transistor IGBT2, a transistor IGBT3, a transistor IGBT4, a transistor IGBT5 and a transistor IGBT6;
the drain electrode of the transistor IGBT1, the drain electrode of the transistor IGBT3 and the drain electrode of the transistor IGBT5 are connected with each other and then connected with the input end of the BUCK module; the source electrode of the transistor IGBT2, the source electrode of the transistor IGBT4 and the source electrode of the transistor IGBT6 are mutually connected; the source electrode of the transistor IGBT1 is connected with the drain electrode of the transistor IGBT 2; the source electrode of the transistor IGBT3 is connected with the drain electrode of the transistor IGBT 4; the source electrode of the transistor IGBT5 is connected with the drain electrode of the transistor IGBT6; the source electrode of the transistor IGBT1, the source electrode of the transistor IGBT3 and the source electrode of the transistor IGBT5 are respectively connected with the input port; and the grid electrode of the transistor IGBT1, the grid electrode of the transistor IGBT2, the grid electrode of the transistor IGBT3, the grid electrode of the transistor IGBT4, the grid electrode of the transistor IGBT5 and the grid electrode of the transistor IGBT6 are respectively connected with the main control module.
The invention is further provided that an RC module is arranged between the three-phase controllable rectification module and the BUCK module; the RC module comprises a resistor R1 and a capacitor C1 which are connected in parallel.
The invention is further arranged that the BUCK module comprises a transistor IGBT7, an inductor L4, a diode D1 and a capacitor C2; the drain electrode of the transistor IGBT7 is connected with the output end of the three-phase controllable rectification module; the grid electrode of the transistor IGBT7 is connected with the main control module; the source electrode of the transistor IGBT7 is connected with the cathode electrode of the diode D1; the source electrode of the transistor IGBT7 is connected with one end of the inductor L4; the other end of the inductor L4 is connected with the input end of the inversion module; the other end of the inductor L4 is connected to the anode of the diode D1 via the capacitor C2.
The invention has the beneficial effects that: according to the invention, four groups of inversion modules and four output ports are arranged, so that self-adaptive self-service output selection can be realized according to the wiring of a user, and meanwhile, the switching of single-phase power and three-phase power can be realized seamlessly and rapidly; in addition, by arranging the BUCK module, the output harmonic wave of the system can be effectively reduced.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a circuit diagram of a conventional ac variable frequency power supply;
FIG. 2 is a circuit diagram of the present invention;
wherein: 1. a 2MW wind power converter; 2. 2MW single-phase inversion module; 3. a three-phase isolation transformer; 4. a single-phase isolation transformer; 5. an input port; 61. a first output port; 62. a second output port; 63. a third output port; 64. a fourth output port.
Detailed Description
The invention is further described in connection with the following examples.
As can be seen from fig. 2, the three-phase and single-phase adaptive output ac variable frequency power supply according to this embodiment includes a main control module, an input port 5, a three-phase controllable rectification module, a BUCK module, an inverter module, a first output port 61, a second output port 62, a third output port 63, and a fourth output port 64; the inversion module comprises a first inversion module, a second inversion module, a third inversion module and a fourth inversion module;
the input end of the three-phase controllable rectifying module is connected with the input port 5; the output end of the three-phase controllable rectifying module is connected with the input end of the BUCK module; the input end of the first inversion module, the input end of the second inversion module, the input end of the third inversion module and the input end of the fourth inversion module are respectively connected with the output end of the BUCK module; the output end of the first inversion module, the output end of the second inversion module, the output end of the third inversion module and the output end of the fourth inversion module are respectively connected with a first output port 61, a second output port 62, a third output port 63 and a fourth output port 64; the master control module is not shown in the figure.
Specifically, in the three-phase and single-phase adaptive output alternating-current variable-frequency power supply of this embodiment, the circuit includes four sets of inverter modules, and four output ports are provided, wherein the first output port 61, the second output port 62, and the third output port 63 are live line outputs, and the fourth output port 64 is a zero line output; when three-phase output is needed, the problem of unbalanced adjustment of three-phase output power can be controlled by increasing the control of the zero line, and meanwhile, if a user wants to connect a transformer at the later stage, a star connection method can be adopted, namely three live wire outputs and one zero line output are connected to the transformer, or the star connection method is adopted, namely three live wire outputs are connected to the transformer.
When single-phase output is required, one interface of the first output port 61, the second output port 62 and the third output port 63 can be selected, and the fourth output port 64 is selected to be connected with the rear stage, so that the alternating-current variable-frequency power supply outputs single-phase voltage; in addition, two or three interfaces of the first output port 61, the second output port 62 and the third output port 63 can be directly short-circuited at the outside, so that the first inverter module, the second inverter module and the third inverter module are connected in parallel, and the power and the efficiency of single-phase output can be enhanced. Through the self-service output of selecting of wiring according to the user that above-mentioned setting can be self-adaptation, single-phase and three-phase electric's switching can seamless fast switch over simultaneously.
In addition, the embodiment can effectively reduce the output harmonic of the system by arranging the BUCK module; when the output voltage of the system is low, the three-phase power supply of the input port 5 of the system is subjected to voltage reduction through the BUCK module after passing through the three-phase controllable rectification module, and then is subjected to inversion through the inversion module. When the output voltage is high, the system carries out direct current boosting through the three-phase controllable rectification module, the transistor IGBT7 of the BUCK module is controlled by the main control module to be conducted all the time, and therefore the inductor L4 and the capacitor C2 form an LC filtering module to provide bus voltage for the inverter system.
In the three-phase and single-phase adaptive output alternating-current variable-frequency power supply of this embodiment, the first inverter module includes a transistor IGBT9, a transistor IGBT10, and an inductor L5; the drain electrode of the transistor IGBT9 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT9 and the grid electrode of the transistor IGBT10 are respectively connected with the main control module; the source electrode of the transistor IGBT9 is connected with the drain electrode of the transistor IGBT 10; the source electrode of the transistor IGBT9 is connected with the first output port 61 through an inductor L5;
the second inversion module comprises a transistor IGBT11, a transistor IGBT12 and an inductor L6; the drain electrode of the transistor IGBT11 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT11 and the grid electrode of the transistor IGBT12 are respectively connected with the main control module; the source electrode of the transistor IGBT11 is connected with the drain electrode of the transistor IGBT 12; the source of the transistor IGBT11 is connected to the second output port 62 through an inductor L6;
the first inversion module comprises a transistor IGBT13, a transistor IGBT14 and an inductor L7; the drain electrode of the transistor IGBT13 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT13 and the grid electrode of the transistor IGBT14 are respectively connected with the main control module; the source electrode of the transistor IGBT13 is connected with the drain electrode of the transistor IGBT 14; the source of the transistor IGBT13 is connected to the third output port 63 through an inductor L7;
the first inversion module comprises a transistor IGBT15, a transistor IGBT16 and an inductor L8; the drain electrode of the transistor IGBT15 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT15 and the grid electrode of the transistor IGBT16 are respectively connected with the main control module; the source electrode of the transistor IGBT15 is connected with the drain electrode of the transistor IGBT 16; the source of the transistor IGBT15 is connected to the fourth output port 64 via an inductor L8;
the source of the transistor IGBT10, the source of the transistor IGBT12, the source of the transistor IGBT14, and the source of the transistor IGBT16 are connected to each other.
Specifically, this embodiment is through above-mentioned setting to make the contravariant module form four groups of H bridge type contravariant modules, thereby can realize three-phase output or single-phase output.
In the three-phase and single-phase adaptive output ac variable frequency power supply of this embodiment, a capacitor C6 is disposed between the first output port 61 and the second output port 62; a capacitor C7 is arranged between the second output port 62 and the third output port 63; a capacitor C8 is arranged between the first output port 61 and the third output port 63; and a capacitor C3, a capacitor C4 and a capacitor C5 are arranged between the fourth output port 64 and the first output port 61, the second output port 62 and the third output port 63 respectively. Through the arrangement, the variable frequency power supply is more stable and reliable to use, and the fourth output port 64 forms zero line output.
The three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply comprises a three-phase controllable rectifier module, a three-phase controllable rectifier module and a three-phase variable-frequency power supply, wherein the three-phase controllable rectifier module comprises a transistor IGBT1, a transistor IGBT2, a transistor IGBT3, a transistor IGBT4, a transistor IGBT5 and a transistor IGBT6;
the drain electrode of the transistor IGBT1, the drain electrode of the transistor IGBT3 and the drain electrode of the transistor IGBT5 are connected with each other and then connected with the input end of the BUCK module; the source electrode of the transistor IGBT2, the source electrode of the transistor IGBT4 and the source electrode of the transistor IGBT6 are mutually connected; the source electrode of the transistor IGBT1 is connected with the drain electrode of the transistor IGBT 2; the source electrode of the transistor IGBT3 is connected with the drain electrode of the transistor IGBT 4; the source electrode of the transistor IGBT5 is connected with the drain electrode of the transistor IGBT6; the source electrode of the transistor IGBT1, the source electrode of the transistor IGBT3 and the source electrode of the transistor IGBT5 are respectively connected with the input port 5; and the grid electrode of the transistor IGBT1, the grid electrode of the transistor IGBT2, the grid electrode of the transistor IGBT3, the grid electrode of the transistor IGBT4, the grid electrode of the transistor IGBT5 and the grid electrode of the transistor IGBT6 are respectively connected with the main control module.
Through the arrangement, the main control module can control the transistor IGBT1, the transistor IGBT2, the transistor IGBT3, the transistor IGBT4, the transistor IGBT5 and the transistor IGBT6 through the PWM, and the three-phase voltage of the input port 5 is rectified and boosted.
In the three-phase and single-phase adaptive output alternating-current variable-frequency power supply of the embodiment, an RC module is arranged between the three-phase controllable rectification module and the BUCK module; the RC module comprises a resistor R1 and a capacitor C1 which are connected in parallel. The variable frequency power supply is more stable and reliable in use through the arrangement.
In the three-phase and single-phase adaptive output alternating-current variable-frequency power supply of this embodiment, the BUCK module includes a transistor IGBT7, an inductor L4, a diode D1, and a capacitor C2; the drain electrode of the transistor IGBT7 is connected with the output end of the three-phase controllable rectifying module; the grid electrode of the transistor IGBT7 is connected with the main control module; the source electrode of the transistor IGBT7 is connected with the cathode electrode of the diode D1; the source electrode of the transistor IGBT7 is connected with one end of the inductor L4; the other end of the inductor L4 is connected with the input end of the inversion module; the other end of the inductor L4 is connected with the anode of the diode D1 through the capacitor C2. When the main control module outputs PWM control to the transistor IGBT7, a BUCK module is formed among the transistor IGBT7, the inductor L4, the diode D1 and the capacitor C2, so that the input direct-current voltage is transmitted to the inverter module after being subjected to voltage reduction; when the main control module controls the transistor IGBT7 to be conducted, the inductor L4 and the capacitor C2 form an LC filtering module to provide bus voltage for the inverter module.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (6)

1. The utility model provides a three-phase and single-phase self-adaptation output exchange variable frequency power supply which characterized in that: the three-phase power supply comprises a main control module, an input port (5), a three-phase controllable rectification module, a BUCK module, an inversion module, a first output port (61), a second output port (62), a third output port (63) and a fourth output port (64); the inversion module comprises a first inversion module, a second inversion module, a third inversion module and a fourth inversion module;
the input end of the three-phase controllable rectifying module is connected with the input port (5); the output end of the three-phase controllable rectifying module is connected with the input end of the BUCK module; the input end of the first inversion module, the input end of the second inversion module, the input end of the third inversion module and the input end of the fourth inversion module are respectively connected with the output end of the BUCK module; the output end of the first inversion module, the output end of the second inversion module, the output end of the third inversion module and the output end of the fourth inversion module are respectively connected with the first output port (61), the second output port (62), the third output port (63) and the fourth output port (64).
2. The three-phase and single-phase adaptive output alternating current variable frequency power supply according to claim 1, characterized in that: the first inversion module comprises a transistor IGBT9, a transistor IGBT10 and an inductor L5; the drain electrode of the transistor IGBT9 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT9 and the grid electrode of the transistor IGBT10 are respectively connected with the main control module; the source electrode of the transistor IGBT9 is connected with the drain electrode of the transistor IGBT 10; the source electrode of the transistor IGBT9 is connected with a first output port (61) through an inductor L5;
the second inversion module comprises a transistor IGBT11, a transistor IGBT12 and an inductor L6; the drain electrode of the transistor IGBT11 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT11 and the grid electrode of the transistor IGBT12 are respectively connected with the main control module; the source electrode of the transistor IGBT11 is connected with the drain electrode of the transistor IGBT 12; the source electrode of the transistor IGBT11 is connected with a second output port (62) through an inductor L6;
the first inversion module comprises a transistor IGBT13, a transistor IGBT14 and an inductor L7; the drain electrode of the transistor IGBT13 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT13 and the grid electrode of the transistor IGBT14 are respectively connected with the main control module; the source electrode of the transistor IGBT13 is connected with the drain electrode of the transistor IGBT 14; the source electrode of the transistor IGBT13 is connected with a third output port (63) through an inductor L7;
the first inversion module comprises a transistor IGBT15, a transistor IGBT16 and an inductor L8; the drain electrode of the transistor IGBT15 is connected with the output end of the BUCK module; the grid electrode of the transistor IGBT15 and the grid electrode of the transistor IGBT16 are respectively connected with the main control module; the source electrode of the transistor IGBT15 is connected with the drain electrode of the transistor IGBT 16; the source electrode of the transistor IGBT15 is connected with a fourth output port (64) through an inductor L8;
the source of the transistor IGBT10, the source of the transistor IGBT12, the source of the transistor IGBT14 and the source of the transistor IGBT16 are connected to each other.
3. The three-phase and single-phase adaptive output alternating current variable frequency power supply according to claim 2, characterized in that: a capacitor C6 is arranged between the first output port (61) and the second output port (62); a capacitor C7 is arranged between the second output port (62) and the third output port (63); a capacitor C8 is arranged between the first output port (61) and the third output port (63); and a capacitor C3, a capacitor C4 and a capacitor C5 are arranged between the fourth output port (64) and the first output port (61), the second output port (62) and the third output port (63) respectively.
4. The three-phase and single-phase adaptive output alternating current variable frequency power supply of claim 1, characterized in that: the three-phase controllable rectifying module comprises a transistor IGBT1, a transistor IGBT2, a transistor IGBT3, a transistor IGBT4, a transistor IGBT5 and a transistor IGBT6;
the drain electrode of the transistor IGBT1, the drain electrode of the transistor IGBT3 and the drain electrode of the transistor IGBT5 are connected with each other and then connected with the input end of the BUCK module; the source electrode of the transistor IGBT2, the source electrode of the transistor IGBT4 and the source electrode of the transistor IGBT6 are mutually connected; the source electrode of the transistor IGBT1 is connected with the drain electrode of the transistor IGBT 2; the source electrode of the transistor IGBT3 is connected with the drain electrode of the transistor IGBT 4; the source electrode of the transistor IGBT5 is connected with the drain electrode of the transistor IGBT6; the source electrode of the transistor IGBT1, the source electrode of the transistor IGBT3 and the source electrode of the transistor IGBT5 are respectively connected with an input port (5); and the grid electrode of the transistor IGBT1, the grid electrode of the transistor IGBT2, the grid electrode of the transistor IGBT3, the grid electrode of the transistor IGBT4, the grid electrode of the transistor IGBT5 and the grid electrode of the transistor IGBT6 are respectively connected with the main control module.
5. The three-phase and single-phase adaptive output alternating current variable frequency power supply of claim 1, characterized in that: an RC module is arranged between the three-phase controllable rectification module and the BUCK module; the RC module comprises a resistor R1 and a capacitor C1 which are connected in parallel.
6. The three-phase and single-phase adaptive output alternating current variable frequency power supply according to claim 1, characterized in that: the BUCK module comprises a transistor IGBT7, an inductor L4, a diode D1 and a capacitor C2; the drain electrode of the transistor IGBT7 is connected with the output end of the three-phase controllable rectification module; the grid electrode of the transistor IGBT7 is connected with the main control module; the source electrode of the transistor IGBT7 is connected with the cathode electrode of the diode D1; the source electrode of the transistor IGBT7 is connected with one end of an inductor L4; the other end of the inductor L4 is connected with the input end of the inversion module; the other end of the inductor L4 is connected with the anode of the diode D1 through the capacitor C2.
CN202211019325.5A 2022-08-24 2022-08-24 Three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply Pending CN115378280A (en)

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CN202211019325.5A CN115378280A (en) 2022-08-24 2022-08-24 Three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply

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CN202211019325.5A CN115378280A (en) 2022-08-24 2022-08-24 Three-phase and single-phase self-adaptive output alternating-current variable-frequency power supply

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