CN215498740U - High-voltage variable-frequency power supply - Google Patents
High-voltage variable-frequency power supply Download PDFInfo
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- CN215498740U CN215498740U CN202122074219.4U CN202122074219U CN215498740U CN 215498740 U CN215498740 U CN 215498740U CN 202122074219 U CN202122074219 U CN 202122074219U CN 215498740 U CN215498740 U CN 215498740U
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Abstract
The utility model discloses a high-voltage variable-frequency power supply, which relates to the technical field of power supplies and comprises a power supply module, a rectification transformation module, a direct-current variable-frequency inversion module, a voltage regulation module, a high-voltage rectification module, a sampling module and a main control module; the alternating current-direct current conversion and conversion device comprises a rectification and transformation module, a direct current frequency conversion inversion module, a voltage regulation module, a high-voltage rectification module, a sampling module and a main control module, wherein the rectification and transformation module is used for converting AC-DC and regulating direct current, the direct current frequency conversion inversion module is used for converting DC-AC and controlling the voltage amplitude and frequency of alternating current, the voltage regulation module is used for regulating alternating current, the high-voltage rectification module is used for converting AC-DC, the sampling module is used for detecting output voltage and current, and the main control module is used for receiving signals, driving a power supply to work and outputting control signals and data signals. The high-voltage variable frequency power supply adopts the silicon controlled rectifier to rectify the voltage at the high-voltage side, has the capability of controlling the high voltage, adopts the IPM intelligent power switch device, not only has the function of switching, but also has the function of protecting the switch, and increases the safety and the reliability of the power supply.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a high-voltage variable-frequency power supply.
Background
The high-voltage variable frequency power supply is a power supply device suitable for AC-DC-AC conversion in high voltage, along with the development of intelligent control and power electronic technology, the application of variable frequency power supply technology is more and more extensive, the variable frequency power supply has been widely used in various industrial, civil and other fields because of its excellent control performance and higher output efficiency, and along with the continuous development of high-voltage transmission technology, the whole high-voltage equipment has raised higher requirements on the safety and reliability of the power supply, but at present, the traditional high-voltage variable frequency power supply mostly adopts a single MOSFET or IGBT as a switching element in the inversion process, the switching element can not achieve good protection effect, and has larger potential safety hazard under high-voltage work, and the stability and reliability of the high-voltage variable frequency power supply can not be guaranteed.
Disclosure of Invention
The embodiment of the utility model provides a high-voltage variable-frequency power supply to solve the problems in the background technology.
According to an embodiment of the present invention, there is provided a high voltage variable frequency power supply, including: the device comprises a power module, a rectification transformation module, a direct current frequency conversion inversion module, a voltage regulation module, a high-voltage rectification module, a sampling module, a main control module, a communication module and an alarm module;
the power supply module is used for providing alternating voltage for the high-voltage variable-frequency power supply;
the rectification transformation module is used for converting the alternating-current voltage output by the power supply module into direct-current voltage and changing the output direct-current voltage;
the direct current frequency conversion inversion module is used for inverting the direct current voltage output by the rectification transformation module into alternating current; the voltage amplitude and the frequency of the output alternating current are controlled;
the voltage regulating module is used for changing the alternating voltage output by the direct current variable frequency inversion module;
the high-voltage rectifying module is used for converting the alternating-current voltage output by the voltage regulating module into direct-current voltage;
the sampling module is used for detecting a voltage signal and a current signal of alternating current output by the direct current frequency conversion inversion module and detecting a voltage signal of direct current voltage output by the high-voltage rectification module;
the main control module is used for receiving the voltage signal and the current signal output by the sampling module, driving the rectification voltage transformation module and the direct current frequency conversion module to work, and outputting a control signal and a data signal;
the communication module is used for receiving the data signal output by the main control module and performing data interaction with a user side;
and the alarm module is used for receiving the control signal output by the main control module and giving out acousto-optic alarm.
Compared with the prior art, the utility model has the beneficial effects that: the high-voltage variable frequency power supply adopts the silicon controlled rectifier to rectify the voltage at the high-voltage side, has the capability of controlling the high voltage, adopts the IPM intelligent power switch device, not only has the function of a switch, but also has overheat short-circuit protection on the switch, and increases the safety and the reliability of the high-voltage variable frequency power supply.
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 high-voltage variable frequency power supply according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a high-voltage variable frequency power supply according to an embodiment of the utility model.
Fig. 3 is a circuit diagram of a sampling module of the high-voltage variable frequency power supply in fig. 2.
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.
Referring to fig. 1, an embodiment of the present invention provides a high-voltage variable frequency power supply, including: the device comprises a power module 1, a rectification transformation module 2, a direct current frequency conversion inversion module 3, a voltage regulation module 4, a high-voltage rectification module 5, a sampling module 6, a main control module 7, a communication module 8 and an alarm module 9;
specifically, the power module 1 is used for providing alternating voltage for the high-voltage variable frequency power supply; the power supply module 1 is connected with the first end of the rectification transformation module 2;
the rectification transformation module 2 is used for converting the alternating-current voltage output by the power supply module 1 into direct-current voltage and changing the output direct-current voltage; the second end of the rectification voltage transformation module 2 is connected with the first end of the rectification frequency conversion inversion module 3;
the direct current frequency conversion inversion module 3 is used for inverting the direct current voltage output by the rectification transformation module 2 into alternating current; the voltage amplitude and the frequency of the output alternating current are controlled; the second end of the direct current variable frequency inversion module 3 is connected with the first end of the voltage regulation module 4 and the first end of the sampling module 6;
the voltage regulating module 4 is used for changing the alternating voltage output by the direct current variable frequency inversion module 3; the second end of the voltage regulating module 4 is connected with the first end of the high-voltage rectifying module 5;
the high-voltage rectifying module 5 is used for converting the alternating-current voltage output by the voltage regulating module 4 into direct-current voltage; the second end of the high-voltage rectifying module 5 is connected with the second end of the sampling module 6;
the sampling module 6 is used for detecting a voltage signal and a current signal of alternating current output by the direct current frequency conversion inversion module 3 and detecting a voltage signal of direct current voltage output by the high-voltage rectification module 5; the third end of the sampling module 6 is connected with the third end of the main control module 7;
the main control module 7 is used for receiving the voltage signal and the current signal output by the sampling module 6, driving the rectification transformation module 2 and the direct current frequency conversion to work, and outputting a control signal and a data signal; the first end of the main control module 7 is connected with the first end of the rectification transformation module 2, and the second end of the main control module 7 is connected with the third end of the direct current variable frequency inversion module 3;
the communication module 8 is used for receiving the data signal output by the main control module 7 and performing data interaction with a user side;
the alarm module 9 is used for receiving the control signal output by the main control module 7 and giving out acousto-optic alarm; the communication module 8 is connected with the fourth end of the main control module 7, and the alarm module 9 is connected with the fifth end of the main control module 7.
In a specific embodiment, the power module 1 may adopt a power grid or a power distribution cabinet to provide a required ac voltage; the rectification voltage transformation module 2 can adopt a full-bridge rectifier consisting of silicon controlled rectifiers to convert alternating current into direct current and can adopt a BUCK control circuit to carry out voltage reduction treatment; the direct current frequency conversion inversion Module 3 controls a Power supply to perform frequency conversion and inversion by adopting an Intelligent Power switch (IPM) control mode; the voltage regulation module 4 can adopt a transformer mode to regulate the power supply; the high-voltage rectifier module 5 may adopt a high-voltage rectifier U2 to convert the input ac power into dc power; the sampling module 6 can respectively sample current and voltage by adopting a current sensor U3 or a voltage sensor, and can also sample voltage by resistance voltage division; the main control module 7 can receive data and control the high-voltage variable-frequency power supply to work in a DSP or singlechip control mode; the communication module 8 may implement wireless data interaction with the monitoring center by using one of General Packet Radio Service (GPRS) communication, ethernet communication, and Long Range (Long Range) communication; the alarm module 9 adopts sound and light alarm, which is not described herein.
Example 2: based on embodiment 1, please refer to fig. 2 and fig. 3, in an embodiment of the high voltage variable frequency power supply according to the present invention, the power module 1 includes a voltage source AC, a fuse F1, a first capacitor C1, a first resistor R1, a second capacitor C2, and a second resistor R2; the rectification and transformation module 2 comprises a first silicon controlled rectifier SCR1, a second silicon controlled rectifier SCR2, a third silicon controlled rectifier SCR3 and a fourth silicon controlled rectifier SCR 4;
specifically, a voltage source AC is connected with a first capacitor C1, a second resistor R2, an anode of a first silicon controlled rectifier SCR1 and a cathode of a second silicon controlled rectifier SCR2 through a fuse F1, the other end of the voltage source AC is connected with a first resistor R1, a second capacitor C2, an anode of a third silicon controlled rectifier SCR3 and a cathode of a fourth silicon controlled rectifier SCR4, the other end of a second resistor R2 is connected with the other end of the second capacitor C2, the other end of the first capacitor C1 is connected with the other end of the first resistor R1, a cathode of the first silicon controlled rectifier SCR1 is connected with a cathode of the third silicon controlled rectifier SCR3, and an anode of the second silicon controlled rectifier SCR2 is connected with an anode of the fourth silicon controlled rectifier SCR 4;
further, the rectification and transformation module 2 further includes a voltage dependent resistor RV, a third capacitor C3, a first switching tube K1, a first diode D1, a first inductor L1, and a fourth capacitor C4;
specifically, the varistor RV is connected to the third capacitor C3, the cathode of the third SCR3, and the collector of the first switch tube K1, the other end of the varistor RV is connected to the other end of the third capacitor C3, the anode of the fourth SCR4, the anode of the first diode D1, and the first end of the fourth capacitor C4, the emitter of the first switch tube K1 is connected to the first inductor L1 and the cathode of the first diode D1, and the other end of the first inductor L1 is connected to the second end of the fourth capacitor C4.
Further, the direct current frequency conversion and inversion module 3 comprises a first switch chip J1, a second switch chip J2, a third switch chip J3 and a fourth switch chip J4; the main control module 7 comprises a first controller U1; specifically, a first terminal of the first switch chip J1 is connected to the second terminal of the fourth capacitor C4 and the first terminal of the second switch chip J2, a second terminal of the first switch chip J1 is connected to the first terminal of the third switch chip J3, a second terminal of the second switch chip J2 is connected to the first terminal of the fourth switch chip J4, a second terminal of the third switch chip J3 is connected to the second terminal of the fourth chip and the first terminal of the fourth capacitor C4, a third terminal of the first switch chip J1, a third terminal of the second switch chip J2, a third terminal of the third switch chip J3 and a third terminal of the fourth switch chip J4 are respectively connected to the second terminal, the third terminal, the fourth terminal and the fifth terminal of the first controller U1, and a first terminal of the first controller U1 is connected to the gate of the first switch tube K1.
Further, the voltage regulation module 4 comprises a first transformer W1; the high-voltage rectifying module 5 comprises a high-voltage rectifier U2 and a seventh capacitor C7;
specifically, a first end of the first transformer W1 is connected to a second end of the second switch chip J2, a second end of the first transformer W1 is connected to a second end of the first switch chip J1, a third end of the first transformer W1 is connected to a first end of the high-voltage rectifier U2, a fourth end of the first transformer W1 is connected to a second end of the high-voltage rectifier U2, and a third end of the high-voltage rectifier U2 is connected to a fourth end of the high-voltage rectifier U2 through a seventh capacitor C7.
Further, the sampling module 6 includes a third resistor R3, a fourth resistor R4, a fifth capacitor R5 and a sixth capacitor R6;
specifically, a first end of the third resistor R3 is connected to the third end of the high-voltage rectifier U2 and the fifth capacitor R5, a second end of the third resistor R3 is connected to the other end of the fifth capacitor R5, the fourth resistor R4, the sixth capacitor R6 and the sixth end of the first controller U1, and the other end of the fourth resistor R4 and the other end of the sixth capacitor R6 are connected to the fourth end of the high-voltage rectifier U2.
Further, the sampling module 6 further includes a current sensor U3, a reference voltage source V1, a comparator a1, a logic chip U4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7;
specifically, the output end of the current sensor U3 is connected to the inverting end of the comparator a1, the non-inverting end of the comparator a1 is connected to the reference voltage source V1, the output end of the comparator a1 is connected to the second end of the logic chip U4, the third end of the logic chip U4 is connected to the eighth end of the first controller U1, the fifth resistor R5 is connected to the second end of the first transformer W1, the other end of the fifth resistor R5 is connected to the seventh end of the first controller U1 and the seventh resistor R7 through the sixth resistor R6, and the other end of the seventh resistor R7 is grounded.
In a specific embodiment, the first switch tube K1 may be driven and controlled by a first controller U1 in an IGBT control manner, and the first switch tube K1, the first diode D1, the first inductor L1 and the fourth capacitor C4 form a BUCK step-down circuit to reduce an input voltage; the first switch chip J1, the second switch chip J2, the third switch chip J3 and the fourth switch chip J4 can select an IPM intelligent power switch composed of a high-speed and low-probability IGBE chip and an optimized gate-level driving and protecting circuit to control the inversion and frequency conversion functions of the power supply, the loss is reduced, the switch has overheat overvoltage short-circuit protection, and the first switch chip J1, the second switch chip J2, the third switch chip J3 and the fourth switch chip J4 need to be isolated and driven and controlled through an optical coupler; the current sensor U3 can be a Hall current sensor U3; the first controller U1 may use a DSP to control the core board for data receiving and driving control, where TMS320F28335 may be used; the comparator A1 can be an LM358 comparator or a TL082 comparator, and the reference voltage source AC is a set value.
In the embodiment of the present invention, the alternating current voltage provided by the power module 1 is rectified into a direct current voltage by the rectification transformation module 2, and the output voltage value is changed by the BUCK circuit, the BUCK circuit is driven and controlled by the main control module 7, the output direct current is further converted by the direct current frequency conversion inversion module 3, the direct current is converted into an alternating current, the inversion process is driven and controlled by the main control module 7, the output alternating current is isolated and regulated by the voltage regulation module 4, and finally the alternating current is converted into a smooth high voltage direct current by the high voltage rectification module 5 for output, the sampling module 6 detects the voltage and current signals output by the high voltage rectification module 5 and the direct current frequency conversion inversion module 3 and feeds back the voltage and current signals to the main control module 7, the main control module 7 further controls the work of the high voltage rectification module 5, the direct current frequency conversion inversion module 3 and the alarm module 9, and transmits the detection data to the user terminal through the communication module 8, wherein the main control module 7 processes data and controls the driving of the switch according to a software system inside the first controller U1.
It will be evident to those skilled in the art that the utility model 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 utility model 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 (8)
1. High-voltage variable frequency power supply, its characterized in that:
this high-voltage variable frequency power supply includes: the device comprises a power module, a rectification and transformation module, a direct-current frequency conversion inversion module, a voltage regulation module, a high-voltage rectification module, a sampling module and a main control module;
the power supply module is used for providing alternating voltage for the high-voltage variable-frequency power supply;
the rectification transformation module is used for converting the alternating-current voltage output by the power supply module into direct-current voltage and changing the output direct-current voltage;
the direct current frequency conversion inversion module is used for inverting the direct current voltage output by the rectification transformation module into alternating current; the voltage amplitude and the frequency of the output alternating current are controlled;
the voltage regulating module is used for changing the alternating voltage output by the direct current variable frequency inversion module;
the high-voltage rectifying module is used for converting the alternating-current voltage output by the voltage regulating module into direct-current voltage;
the sampling module is used for detecting a voltage signal and a current signal of alternating current output by the direct current frequency conversion inversion module and detecting a voltage signal of direct current voltage output by the high-voltage rectification module;
the main control module is used for receiving the voltage signal and the current signal output by the sampling module, driving the rectification voltage transformation module and the direct current frequency conversion module to work, and outputting a control signal and a data signal.
2. The high-voltage variable-frequency power supply according to claim 1, further comprising a communication module and an alarm module;
the communication module is used for receiving the data signal output by the main control module and performing data interaction with a user side;
the alarm module is used for receiving the control signal output by the main control module and giving out acousto-optic alarm;
the communication module is connected with the fourth end of the main control module, and the alarm module is connected with the fifth end of the main control module.
3. The high-voltage variable frequency power supply according to claim 1, wherein the power supply module comprises a voltage source, a fuse, a first capacitor, a first resistor, a second capacitor and a second resistor; the rectification voltage transformation module comprises a first silicon controlled rectifier, a second silicon controlled rectifier, a third silicon controlled rectifier and a fourth silicon controlled rectifier;
the voltage source is connected with the anode of the first capacitor, the second resistor, the first controlled silicon and the cathode of the second controlled silicon through the fuse, the other end of the voltage source is connected with the anode of the first resistor, the second capacitor, the third controlled silicon and the cathode of the fourth controlled silicon, the other end of the second resistor is connected with the other end of the second capacitor, the other end of the first capacitor is connected with the other end of the first resistor, the cathode of the first controlled silicon is connected with the cathode of the third controlled silicon, and the anode of the second controlled silicon is connected with the anode of the fourth controlled silicon.
4. The high-voltage variable-frequency power supply according to claim 3, wherein the rectification transformation module further comprises a voltage dependent resistor, a third capacitor, a first switch tube, a first diode, a first inductor and a fourth capacitor;
the voltage dependent resistor is connected with the cathode of the third capacitor, the cathode of the third silicon controlled rectifier and the collector of the first switch tube, the other end of the voltage dependent resistor is connected with the other end of the third capacitor, the anode of the fourth silicon controlled rectifier, the anode of the first diode and the first end of the fourth capacitor, the emitter of the first switch tube is connected with the cathode of the first inductor and the cathode of the first diode, and the other end of the first inductor is connected with the second end of the fourth capacitor.
5. The high-voltage variable-frequency power supply according to claim 4, wherein the direct-current variable-frequency inversion module comprises a first switch chip, a second switch chip, a third switch chip and a fourth switch chip; the main control module comprises a first controller;
the first end of the first switch chip is connected with the second end of the fourth capacitor and the first end of the second switch chip, the second end of the first switch chip is connected with the first end of the third switch chip, the second end of the second switch chip is connected with the first end of the fourth switch chip, the second end of the third switch chip is connected with the second end of the fourth chip and the first end of the fourth capacitor, the third end of the first switch chip, the third end of the second switch chip, the third end of the third switch chip and the third end of the fourth switch chip are respectively connected with the second end, the third end, the fourth end and the fifth end of the first controller, and the first end of the first controller is connected with the grid electrode of the first switch tube.
6. The high-voltage variable frequency power supply according to claim 5, wherein the voltage regulation module comprises a first transformer; the high-voltage rectifying module comprises a high-voltage rectifier and a seventh capacitor;
the first end of the first transformer is connected with the second end of the second switch chip, the second end of the first transformer is connected with the second end of the first switch chip, the third end of the first transformer is connected with the first end of the high-voltage rectifier, the fourth end of the first transformer is connected with the second end of the high-voltage rectifier, and the third end of the high-voltage rectifier is connected with the fourth end of the high-voltage rectifier through a seventh capacitor.
7. The high-voltage variable-frequency power supply according to claim 6, wherein the sampling module comprises a third resistor, a fourth resistor, a fifth capacitor and a sixth capacitor;
the first end of the third resistor is connected with the third end of the high-voltage rectifier and the fifth capacitor, the second end of the third resistor is connected with the other end of the fifth capacitor, the fourth resistor, the sixth capacitor and the sixth end of the first controller, and the other end of the fourth resistor and the other end of the sixth capacitor are connected with the fourth end of the high-voltage rectifier.
8. The high-voltage variable-frequency power supply according to claim 7, wherein the sampling module further comprises a current sensor, a reference voltage source, a comparator, a logic chip, a fifth resistor, a sixth resistor and a seventh resistor;
the output end of the current sensor is connected with the inverting end of the comparator, the non-inverting end of the comparator is connected with the reference voltage source, the output end of the comparator is connected with the second end of the logic chip, the third end of the logic chip is connected with the eighth end of the first controller, the fifth resistor is connected with the second end of the first transformer, the other end of the fifth resistor is connected with the seventh end and the seventh resistor of the first controller through the sixth resistor, and the other end of the seventh resistor is grounded.
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| CN202122074219.4U CN215498740U (en) | 2021-08-31 | 2021-08-31 | High-voltage variable-frequency power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114629347A (en) * | 2022-03-30 | 2022-06-14 | 歌尔科技有限公司 | Voltage conversion device and display equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114629347A (en) * | 2022-03-30 | 2022-06-14 | 歌尔科技有限公司 | Voltage conversion device and display equipment |
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