CN119628386A - A medium frequency power supply with multiple power supplies - Google Patents
A medium frequency power supply with multiple power supplies Download PDFInfo
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- CN119628386A CN119628386A CN202411507018.0A CN202411507018A CN119628386A CN 119628386 A CN119628386 A CN 119628386A CN 202411507018 A CN202411507018 A CN 202411507018A CN 119628386 A CN119628386 A CN 119628386A
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- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 12
- 229910010271 silicon carbide Inorganic materials 0.000 description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 9
- 229910052710 silicon Inorganic materials 0.000 description 9
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- -1 iron silicon aluminum Chemical compound 0.000 description 3
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Abstract
本发明公开了一种多种供电电源的中频电源，所述的中频电源包括：第一到第六电源模块及主控板模块；第一电源模块的输入是三相或单相市电，输出为第一直流高压电压；第二电源模块的输入是三相中频交流，输出为第二直流高压电压；第三电源模块和第四电源模块的输入为第二直流高压电压，分别输出一组第三、第四直流电压；第五电源模块的输入为第二直流高压电压，输出为三相中频交流电压输出；第六电源模块将第一直流高压电源变换为第二直流高压电压供给第三电源模块、第四电源模块和第五电源模块；主控板模块控制第一电源模块到第六电源模块的启动和关断，主控板还包括通用输入/输出接口，主控板的通用输入/输出接口连接输入设备和指示灯显示系统。
The invention discloses a medium frequency power supply of multiple power supplies, the medium frequency power supply comprising: first to sixth power supply modules and a main control board module; the input of the first power supply module is three-phase or single-phase mains electricity, and the output is a first DC high voltage voltage; the input of the second power supply module is a three-phase medium frequency alternating current, and the output is a second DC high voltage voltage; the input of the third power supply module and the fourth power supply module is a second DC high voltage voltage, and a group of third and fourth DC voltages are output respectively; the input of the fifth power supply module is a second DC high voltage voltage, and the output is a three-phase medium frequency alternating current voltage output; the sixth power supply module converts the first DC high voltage power supply into a second DC high voltage voltage to supply the third power supply module, the fourth power supply module and the fifth power supply module; the main control board module controls the start and shut down of the first power supply module to the sixth power supply module, and the main control board also comprises a universal input/output interface, and the universal input/output interface of the main control board is connected to an input device and an indicator light display system.
Description
Technical Field
The invention relates to the technical field of single-person portable power supply equipment, in particular to an intermediate frequency power supply with various power supplies.
Background
The generator on the traditional aero-engine realizes power supply by extracting shaft power, and has smaller power generation capacity. Because the capacity of the traditional aero-generator is smaller, the power supply system of the traditional aero-generator sequentially experiences a 28V direct current system, a 115V400Hz alternating current system or a mixed power system combining the two systems, but as the aircraft body is bigger, the traditional power supply system can not meet the power consumption requirement of the aircraft.
Because the aviation power supply system is required to work normally in both a unit power supply mode and a power grid power supply mode, a multifunctional power electronic converter system which can work in different occasions is needed.
Disclosure of Invention
The invention aims to provide an intermediate frequency power supply of various power supplies, which comprises a first power supply module, a second power supply module, a third power supply module, a fourth power supply module, a fifth power supply module, a sixth power supply module and a main control board module;
The input of the first power supply module is three-phase or single-phase commercial power alternating current power supply, and the output of the first power supply module is first direct current high voltage which is supplied to the sixth power supply module;
the input of the second power supply module is a three-phase medium-frequency alternating current power supply, and the output of the second power supply module is a second direct current high-voltage;
The input of the third power supply module and the fourth power supply module is second direct-current high-voltage, the third power supply module independently outputs a group of third direct-current voltage, and the fourth power supply module independently outputs a group of fourth direct-current voltage;
The input of the fifth power supply module is second direct-current high-voltage, and the output of the fifth power supply module is three-phase medium-frequency alternating-current voltage output;
the input of the sixth power supply module is a first direct-current high-voltage power supply, and the first direct-current high-voltage power supply is converted into a second direct-current high-voltage power supply to be supplied to the third power supply module, the fourth power supply module and the fifth power supply module;
the main control board module controls the starting and the stopping of the first power supply module, the second power supply module, the third power supply module, the fourth power supply module, the fifth power supply module and the sixth power supply module, monitors the working states of the first power supply module to the sixth power supply module, and further comprises a general input/output interface, and the general input/output interface of the main control board is connected with the input equipment and the indicator light display system.
According to the intermediate frequency power supply disclosed by the invention, a three-phase alternating current power supply input by the first power supply module is connected to the input end of the three-phase Vienna rectifying circuit through the three-phase air switch and the first overvoltage protection circuit;
The single-phase alternating current power supply input by the first power supply module is connected to the input end of the three-phase Vienna rectifying circuit through a single-phase air switch and a first overvoltage protection circuit, and the output of the three-phase Vienna rectifying circuit is a first direct current high-voltage.
According to the intermediate frequency power supply disclosed by the invention, the three-phase intermediate frequency alternating current power supply input by the second power supply module is connected to the input end of the three-phase PWM rectifying circuit through the three-phase air switch and the second overvoltage protection circuit, and the output of the three-phase PWM rectifying circuit is the second direct current high-voltage.
The intermediate frequency power supply comprises a first power supply module, a second power supply module and a main control board module, wherein the first power supply module, the second power supply module and the main control board module are connected through an internal RS485 bus, the main control board module controls the first power supply module and the second power supply module through the internal RS485 bus, the main control board module detects input power supplies and controls the first power supply module and the second power supply module to only use one of three-phase alternating current power supplies, single-phase alternating current power supplies or three-phase intermediate frequency alternating current power supplies as an input power supply at any moment, and inputs of other alternating current power supplies are cut off.
The main control board module is also connected with an auxiliary direct current power supply, and the auxiliary direct current power supply supplies power to the main control board module through a first flyback auxiliary power supply of the first power supply module and a second flyback auxiliary power supply of the second power supply module;
the auxiliary direct-current power supply is formed by a first flyback auxiliary power supply of the first power supply module and a second flyback auxiliary power supply of the second power supply module, and can also provide power supply for an external 1553B bus and a portable computer;
the input of the first flyback auxiliary power supply is a first direct-current high-voltage;
the input of the second flyback auxiliary power supply is second direct-current high-voltage, and the output of the second flyback auxiliary power supply is first auxiliary voltage;
The main control board module is also connected with a remote control computer through an external RS485 bus. According to the intermediate frequency power supply disclosed by the invention, the direct current/direct current conversion circuit of the third power supply module converts the input second direct current high voltage into the third direct current voltage, and outputs the third direct current voltage through the third electromagnetic compatibility circuit;
the direct current/direct current conversion circuit of the fourth power supply module converts the input second direct current high voltage into a fourth direct current voltage, and outputs the fourth direct current voltage through a fourth electromagnetic compatibility circuit;
the direct current/direct current conversion circuit comprises a phase-shifting full-bridge conversion circuit or an LLC full-bridge resonance conversion circuit.
The intermediate frequency power supply comprises a main control board module, a third power module, a fourth power module, a third power module and a fourth power module, wherein the main control board module is used for detecting the voltage and the current output by the third power module and the fourth power module through voltage and current detection ends;
The ON/OFF is arranged inside the DC/DC conversion circuit.
According to the intermediate frequency power supply disclosed by the invention, the three-phase inverter circuit module arranged in the fifth power supply module converts the second direct-current high-voltage into the three-phase intermediate frequency alternating-current voltage, and the three-phase intermediate frequency alternating-current voltage is output through the fifth electromagnetic compatibility circuit.
According to the intermediate frequency power supply disclosed by the invention, the main control board module is connected with the fifth power supply module through the internal RS485 bus, monitors the input and output voltage of the fifth power supply module, and controls the on or off of the output voltage of the fifth power supply module.
According to the intermediate frequency power supply, the direct current/direct current conversion circuit arranged in the sixth power supply module converts the input first direct current high voltage into the second direct current voltage, and the direct current/direct current conversion circuit comprises a phase-shifting full-bridge conversion circuit or an LLC full-bridge resonance conversion circuit.
The intermediate frequency power supply has the advantages that the intermediate frequency power supply can be compatible with three paths of alternating current power supply input, including single-phase AC220V, three-phase AC220V and AC115V400Hz, any path of input can work after being accessed, three paths of input can be automatically selected and switched at the same time, the intermediate frequency power supply is not damaged, and the system can set three paths of input priorities to automatically select input power supply. The various converters of the invention adopt the iron silicon aluminum magnetic core to wind the filter inductance, the hysteresis loop is narrow, and the magnetizing frequency can be improved, thereby reducing the volume weight and improving the power density. The rectifying tube adopts a silicon carbide diode, and the switching transistor adopts a silicon carbide MOSFET, so that compared with the silicon diode and the silicon MOSFET, the switching frequency can be increased from 10kHz-20kHz to 50kHz-100kHz, the volume weight of a power supply system is greatly reduced, and the energy density is improved.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Drawings
FIG. 1 is a block diagram of a bi-directional powered intermediate frequency power supply system of the present invention;
FIG. 2 is a block diagram of the internal components of the first power module of the present invention;
fig. 3 is a schematic diagram of a three-phase vienna rectifier circuit of the present invention;
FIG. 4 is a block diagram of the internal components of a second power module of the present invention;
FIG. 5 is a block diagram of the internal components of a fifth power module of the present invention;
FIG. 6 is a schematic diagram of an LLC full bridge resonant circuit for use with the present invention;
FIG. 7 is a schematic diagram of a three-phase inverter circuit used in the present invention;
fig. 8 is a block diagram of the internal components of the main control board of the present invention.
Detailed Description
The intermediate frequency power supply provided by the invention is used for providing two paths of DC28V10A direct current and one path of AC115V10A400Hz three-phase alternating current for an aircraft hanging point, and one path of DC28V3A direct current is used for charging a 1553B mainboard and a tablet computer. The power supply is required to be compatible with three power inputs of single-phase and three-phase AC220V50Hz and AC115V400Hz, and when the three power inputs are simultaneously accessed, the medium-frequency power supply is ensured not to be damaged. The invention is characterized in that the filter inductor is wound by adopting the Fe-Si-Al magnetic core at a plurality of positions in various converters, so that the hysteresis loop of the inductor and the transformer is narrow, the magnetizing frequency is high, the volume weight of the converter is greatly reduced, and the power density of each converter is improved. The electronic components of the various converters are also carefully selected. The rectifier tubes of each stage use silicon carbide diodes, and the switching transistors used as switching elements use silicon carbide MOSFETs. Compared with the silicon-based diode and the silicon-based MOSFET which are commonly used at present, the silicon-based MOSFET has great advantages in switching frequency and conduction loss, can greatly improve the switching frequency, obviously reduces the volume weight of the whole power supply system and improves the energy density.
The technical solution of the present invention will be clearly and completely described in conjunction with the specific embodiments, but it should be understood by those skilled in the art that the embodiments described below are only for illustrating the present invention and should not be construed as limiting the scope of the present invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on the embodiments of the present invention, are within the scope of the present invention.
The structure block diagram of the intermediate frequency power supply system is shown in figure 1.
The invention provides an intermediate frequency power supply of various power supplies, which comprises a first power supply module, a second power supply module, a third power supply module, a fourth power supply module, a fifth power supply module, a sixth power supply module and a main control board module;
The input of the first power supply module is three-phase or single-phase commercial power alternating current power supply, and the output of the first power supply module is first direct current high voltage which is supplied to the sixth power supply module;
the input of the second power supply module is a three-phase medium-frequency alternating current power supply, and the output of the second power supply module is a second direct current high-voltage;
The input of the third power supply module and the fourth power supply module is second direct-current high-voltage, the third power supply module independently outputs a group of third direct-current voltage, and the fourth power supply module independently outputs a group of fourth direct-current voltage;
The input of the fifth power supply module is second direct-current high-voltage, and the output of the fifth power supply module is three-phase medium-frequency alternating-current voltage output;
the input of the sixth power supply module is a first direct-current high-voltage power supply, and the first direct-current high-voltage power supply is converted into a second direct-current high-voltage power supply to be supplied to the third power supply module, the fourth power supply module and the fifth power supply module;
the main control board module controls the starting and the stopping of the first power supply module, the second power supply module, the third power supply module, the fourth power supply module, the fifth power supply module and the sixth power supply module, monitors the working states of the first power supply module to the sixth power supply module, and further comprises a general input/output interface, and the general input/output interface of the main control board is connected with the input equipment and the indicator light display system.
Example 1
The intermediate frequency power supply comprises a power panel 1, a power panel 2, a power panel 3, a power panel 4, a power panel 5, a power panel 6, a main control panel, keys and a display device. And the power panel 3 and the power panel 4 output detection and control components.
Fig. 2 is a block diagram showing the internal components of the first power module of the present invention. The power panel 1 receives a single-phase alternating current power supply 220V and a three-phase alternating current power supply 220V, which are mains power supplies with a power frequency of 50Hz or 60Hz, respectively. The power panel 2 receives 115V400Hz of the intermediate frequency alternating current power supply, any one of the power supplies is connected in, the intermediate frequency power supply can work, when the main control panel detects more than two paths of the three paths of input power supplies are input simultaneously, one path of input power supply is automatically selected according to the set priority, and in order to ensure that the intermediate frequency power supply is not damaged, the set priority is 220V of the three-phase alternating current power supply, 220V of the single-phase alternating current power supply or 115V400Hz of the intermediate frequency alternating current power supply.
Fig. 3 is a schematic diagram of a three-phase vienna rectifier circuit of the present invention. The three-phase or single-phase alternating current power supply 220V input by the power panel 1 can perform alternating current/direct current conversion through the three-phase Vienna rectification circuit of the power panel 1 to rectify alternating current into direct current of 800V, wherein when the single-phase alternating current power supply 220V is input, the inside is connected through a mechanical switch, the Vienna rectification is performed according to three single phases to process, and the input N line is connected with the output capacitance midpoint circuit to be compatible with the single-phase input Vienna rectification. This does not increase hardware capacity. The Vienna rectifying circuit can realize the functions of 1 input power factor and low input current harmonic content, meanwhile, the drive power supply does not need high-low side isolation, but the phase drives need isolation.
In fig. 1, MT1 and MT2 are voltage sensors C3, C4 and C5 are high-voltage filter capacitors.
In the figure 3, the inductors L1, L2 and L3 are wound by adopting the Fe-Si-Al magnetic core to form a filter inductor, the hysteresis loop is narrow, and the magnetizing frequency can be improved, so that the volume and the weight are reduced, and the power density is improved. The D1-D6 adopts silicon carbide diodes, the Q1-Q6 adopts silicon carbide MOSFETs, and compared with the silicon-based diodes and the silicon-based MOSFETs, the switching frequency can be increased from 10kHz-20kHz to 50kHz-100kHz, the volume weight of a power supply system is greatly reduced, and the energy density is improved.
Fig. 6 is a schematic diagram of an LLC full-bridge resonant circuit used in the present invention.
The direct current of 800V passes through a direct current/direct current converter of an LLC (double-inductance single-capacitance series resonance) full-bridge resonant circuit on the power panel 6 to realize the direct current-to-direct current conversion of an isolated high-power high-frequency soft switch between input and output, the transformer has high utilization rate, and the highest efficiency conversion can be realized by assisting with synchronous rectification of a secondary side, and meanwhile, the electromagnetic compatibility pressure is reduced.
The switching transistors Q13-16 in the LLC (double-inductance single-capacitance series resonance) full-bridge resonance circuit adopt silicon carbide MOSFETs, and Q17-Q20 adopt the silicon carbide MOSFETs to carry out synchronous rectification, thereby greatly reducing loss, improving frequency and reducing the volume and weight of a power supply system.
FIG. 4 is a block diagram of the internal components of a second power module of the present invention;
When an intermediate frequency alternating current power supply is used, 115V400Hz performs rectification boosting processing through a three-phase PWM rectification circuit of the power panel 2, and the 115V400Hz three-phase alternating current of the alternating current power supply is directly converted into 360V direct current to be used by a later-stage converter. Note that the single-phase ac power supply, the three-phase ac power supply, or the three-phase intermediate frequency ac power supply of the present invention is alternatively used. The power panel 1 and the power panel 2 are connected with an electromagnetic compatibility filter and an overvoltage and overcurrent soft start protection circuit between the air switch and the rectifying circuit, and the electromagnetic compatibility filter and the overvoltage and overcurrent soft start protection circuit have various embodiments in the field, are not key technologies required to be protected by the invention, and can be regarded as a whole overvoltage protection circuit.
According to the intermediate frequency power supply disclosed by the invention, a three-phase alternating current power supply input by the first power supply module is connected to the input end of the three-phase Vienna rectifying circuit through the three-phase air switch and the first overvoltage protection circuit;
The single-phase alternating current power supply input by the first power supply module is connected to the input end of the three-phase Vienna rectifying circuit through a single-phase air switch and a first overvoltage protection circuit, and the output of the three-phase Vienna rectifying circuit is a first direct current high-voltage.
According to the intermediate frequency power supply disclosed by the invention, the three-phase intermediate frequency alternating current power supply input by the second power supply module is connected to the input end of the three-phase Pulse Width Modulation (PWM) rectifying circuit through the three-phase air switch and the second overvoltage protection circuit, and the output of the three-phase Pulse Width Modulation (PWM) rectifying circuit is the second direct current high-voltage.
Fig. 4 is a block diagram showing the internal components of the second power module of the present invention.
Example 2
The intermediate frequency power supply comprises a first power supply module, a second power supply module and a main control board module, wherein the first power supply module, the second power supply module and the main control board module are connected through an internal RS485 bus, the main control board module controls the first power supply module and the second power supply module through the internal RS485 bus, the main control board module detects input power supplies and controls the first power supply module and the second power supply module to only use one of three-phase alternating current power supplies, single-phase alternating current power supplies or three-phase intermediate frequency alternating current power supplies as an input power supply at any moment, and inputs of other alternating current power supplies are cut off.
The main control board module is also connected with an auxiliary direct current power supply, and the auxiliary direct current power supply supplies power to the main control board module through a first flyback auxiliary power supply of the first power supply module and a second flyback auxiliary power supply of the second power supply module;
the auxiliary direct-current power supply is formed by a first flyback auxiliary power supply of the first power supply module and a second flyback auxiliary power supply of the second power supply module, and can also provide power supply for an external 1553B bus and a portable computer;
the input of the first flyback auxiliary power supply is a first direct-current high-voltage;
the input of the second flyback auxiliary power supply is second direct-current high-voltage, and the output of the second flyback auxiliary power supply is first auxiliary voltage;
The external auxiliary direct current power supply is connected to an auxiliary power supply input end of the main control board module;
The main control board module is also connected with a remote control computer through an external RS485 bus. The main control board can be used as a slave machine to acquire working instructions from the upper computer through an external RS485 bus and upload the internal working state of the intermediate frequency power supply.
Example 3
The power panel 3 and the power panel 4 have the same structure, and the direct current/direct current conversion circuit on the panel converts the input second direct current high voltage into the third direct current voltage, and converts 360V direct current into two paths of DC28V10A for output. The power panel 5 converts 360V direct current into three-phase alternating current 115V10A400Hz alternating current output, and the auxiliary source of the main control panel is the DC/DC 800/28 flyback auxiliary source in the power panel 1 or the DC360V direct current bus rectified by the alternating current 115V400Hz auxiliary source jointly generates internal DC28V1 as auxiliary power source through the DC/DC360/28 flyback power source to be output to the main control panel and the tablet computer charger for supplying power.
The main control board is used as a host to control the start and stop of the power panel 1, the power panel 2, the power panel 5 and the power panel 6 and obtain the working states of the power panel 1, the power panel 2 and the power panel 6 through the RS485 bus 1, and the input power supply on the power panel 1 or the power panel 2 is selected as one, and the three-phase alternating current power supply is selected as the priority. Since the input power supplies on the power panel 1 and the power panel 2 are selected, substantially 360V output by the power panel 2 and the power panel 6 exists only in one group at any time. In addition, the main control board controls whether the power panel 3 and the power panel 4 work or not through the ON/OFF switch to detect the output voltage and the current of the power panel 3 and the power panel 4, controls whether the auxiliary voltage VDC28V is connected into the power panel 2 or not through the ON/OFF switch, and acquires a key command through a general IO port and displays the working state of the system through the indicator lamp.
The master control board is used as a slave machine to acquire working instructions and upload the working state of the system from the upper computer through the RS485 bus 2.
Example 4
According to the intermediate frequency power supply disclosed by the invention, the direct current/direct current conversion circuit of the third power supply module converts the input second direct current high voltage into the third direct current voltage, and outputs the third direct current voltage through the third electromagnetic compatibility circuit;
the direct current/direct current conversion circuit of the fourth power supply module converts the input second direct current high voltage into a fourth direct current voltage, and outputs the fourth direct current voltage through a fourth electromagnetic compatibility circuit;
the direct current/direct current conversion circuit comprises a phase-shifting full-bridge conversion circuit or an LLC full-bridge resonance conversion circuit.
The intermediate frequency power supply comprises a main control board module, a third power module, a fourth power module, a third power module and a fourth power module, wherein the main control board module is used for detecting the voltage and the current output by the third power module and the fourth power module through voltage and current detection ends;
The ON/OFF is arranged inside the DC/DC conversion circuit.
According to the intermediate frequency power supply disclosed by the invention, the three-phase inverter circuit module arranged in the fifth power supply module converts the second direct-current high-voltage into the three-phase intermediate frequency alternating-current voltage, and the three-phase intermediate frequency alternating-current voltage is output through the fifth electromagnetic compatibility circuit.
According to the intermediate frequency power supply disclosed by the invention, the main control board module is connected with the fifth power supply module through the internal RS485 bus, monitors the input and output chapter tables of the fifth power supply module, and controls the on/off of the output voltage of the fifth power supply module.
Fig. 7 is a schematic diagram of a three-phase inverter circuit used in the present invention.
The power panel 5 includes a three-phase inverter circuit, an electromagnetic compatibility filter, a switching circuit, and an internal RS485 bus. The internal RS485 bus is used for establishing communication with the main control board and exchanging control and state information. The three-phase inverter circuit is a basic circuit of the power board 5.
The L4-L6 adopts a ferro-silicon-aluminum magnetic core to wind a filter inductor, the hysteresis loop is narrow, and the magnetization frequency can be improved, so that the volume weight is reduced, and the power density is improved. Q7-Q12 employ 650V,65A, silicon carbide MOSFETs with on-resistances Rdson of the order of 50mΩ. The silicon carbide MOSFET is adopted, so that the switching frequency can be increased from 10kHz-20kHz to 50kHz-100kHz, the volume weight of a power supply system is greatly reduced, and the energy density is improved. L4-L6 adopts iron-silicon-aluminum 26 mu series magnetic cores.
Fig. 8 is a block diagram of the internal components of the main control board of the present invention.
Wherein the on/off terminals are used for controlling the switch of the third and fourth power modules, and the Vcs1, ics1, vcs2 and Ics2 terminals are used for detecting the output voltage and current of the third and fourth power modules.
The intermediate frequency power supply can be compatible with three paths of alternating current power supply input, wherein the three paths of alternating current power supply input comprises a single-phase alternating current power supply 220V, a three-phase alternating current power supply 220V and an alternating current power supply 115V400Hz, the intermediate frequency power supply can work after any one path of input is accessed, the three paths of the intermediate frequency power supply can be automatically selected and switched when the three paths of the intermediate frequency power supply are simultaneously input, the intermediate frequency power supply is not damaged, and the system can set three paths of input priorities to automatically select input power supply. The various converters of the invention adopt the iron silicon aluminum magnetic core to wind the filter inductance, the hysteresis loop is narrow, and the magnetizing frequency can be improved, thereby reducing the volume weight and improving the power density. The rectifying tube adopts a silicon carbide diode, and the switching transistor adopts a silicon carbide MOSFET, so that compared with the silicon diode and the silicon MOSFET, the switching frequency can be increased from 10kHz-20kHz to 50kHz-100kHz, the volume weight of a power supply system is greatly reduced, and the energy density is improved.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (10)
1. The intermediate frequency power supply of the multiple power supplies is characterized by comprising a first power supply module, a second power supply module, a third power supply module, a fourth power supply module, a fifth power supply module, a sixth power supply module and a main control board module;
The input of the first power supply module is three-phase or single-phase commercial power alternating current power supply, and the output of the first power supply module is first direct current high voltage which is supplied to the sixth power supply module;
the input of the second power supply module is a three-phase medium-frequency alternating current power supply, and the output of the second power supply module is a second direct current high-voltage;
The input of the third power supply module and the fourth power supply module is second direct-current high-voltage, the third power supply module independently outputs a group of third direct-current voltage, and the fourth power supply module independently outputs a group of fourth direct-current voltage;
The input of the fifth power supply module is second direct-current high-voltage, and the output of the fifth power supply module is three-phase medium-frequency alternating-current voltage output;
the input of the sixth power supply module is a first direct-current high-voltage power supply, and the first direct-current high-voltage power supply is converted into a second direct-current high-voltage power supply to be supplied to the third power supply module, the fourth power supply module and the fifth power supply module;
the main control board module controls the starting and the stopping of the first power supply module, the second power supply module, the third power supply module, the fourth power supply module, the fifth power supply module and the sixth power supply module, monitors the working states of the first power supply module to the sixth power supply module, and further comprises a general input/output interface, and the general input/output interface of the main control board is connected with the input equipment and the indicator light display system.
2. The medium frequency power supply according to claim 1, wherein the three-phase alternating current power supply input by the first power supply module is connected to the input end of the three-phase vienna rectification circuit through a three-phase air switch and a first overvoltage protection circuit;
The single-phase alternating current power supply input by the first power supply module is connected to the input end of the three-phase Vienna rectifying circuit through a single-phase air switch and a first overvoltage protection circuit, and the output of the three-phase Vienna rectifying circuit is a first direct current high-voltage.
3. The medium frequency power supply of claim 1, wherein the three-phase medium frequency ac power input by the second power module is connected to an input end of a three-phase PWM rectifying circuit through a three-phase air switch and a second overvoltage protection circuit, and an output of the three-phase PWM rectifying circuit is a second dc high voltage.
4. The medium frequency power supply according to any one of claims 1-3, wherein the first power supply module, the second power supply module and the main control board module are interconnected through an internal RS485 bus, the main control board module controls the first power supply module and the second power supply module through the internal RS485 bus, the main control board module detects the input power supply and controls the first power supply module and the second power supply module to use only one of a three-phase alternating current power supply, a single-phase alternating current power supply or a three-phase medium frequency alternating current power supply as an input power supply at any moment and cut off the input of other alternating current power supplies.
5. The medium frequency power supply of claim 4, wherein the main control board module is further connected with an auxiliary direct current power supply, and the auxiliary direct current power supply supplies power to the main control board module by a first flyback auxiliary power supply of the first power supply module and a second flyback auxiliary power supply of the second power supply module;
the auxiliary direct-current power supply is formed by a first flyback auxiliary power supply of the first power supply module and a second flyback auxiliary power supply of the second power supply module, and can also provide power supply for an external 1553B bus and a portable computer;
the input of the first flyback auxiliary power supply is a first direct-current high-voltage;
the input of the second flyback auxiliary power supply is second direct-current high-voltage, and the output of the second flyback auxiliary power supply is first auxiliary voltage;
The main control board module is also connected with a remote control computer through an external RS485 bus.
6. The if power supply of claim 1, wherein the dc/dc conversion circuit of the third power supply module converts the inputted second dc high voltage to a third dc voltage and outputs the third dc voltage through a third electromagnetic compatibility circuit;
the direct current/direct current conversion circuit of the fourth power supply module converts the input second direct current high voltage into a fourth direct current voltage, and outputs the fourth direct current voltage through a fourth electromagnetic compatibility circuit;
the direct current/direct current conversion circuit comprises a phase-shifting full-bridge conversion circuit or an LLC full-bridge resonance conversion circuit.
7. The medium frequency power supply of claim 6, wherein the main control board module detects the voltage and the current output by the third power supply module and the fourth power supply module through a voltage and current detection end, and the main control board can control the ON/OFF switch of the third power supply module or the fourth power supply module to turn ON or OFF the voltage output of the third power supply module or the fourth power supply module;
The ON/OFF is arranged inside the DC/DC conversion circuit.
8. The medium frequency power supply according to claim 1, wherein the three-phase inverter circuit module provided in the fifth power supply module converts the second dc high voltage into a three-phase medium frequency ac voltage and outputs the three-phase medium frequency ac voltage through a fifth electromagnetic compatibility circuit.
9. The medium frequency power supply according to claim 8, wherein the main control board module is connected to a fifth power module through an internal RS485 bus, monitors input and output voltages of the fifth power module, and controls on or off of the output voltage of the fifth power module.
10. The medium frequency power supply of claim 1, wherein the DC/DC conversion circuit in the sixth power module converts the input first DC high voltage to a second DC voltage, and the DC/DC conversion circuit comprises a phase-shift full-bridge conversion circuit or an LLC full-bridge resonance conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411507018.0A CN119628386A (en) | 2024-10-28 | 2024-10-28 | A medium frequency power supply with multiple power supplies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411507018.0A CN119628386A (en) | 2024-10-28 | 2024-10-28 | A medium frequency power supply with multiple power supplies |
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| Publication Number | Publication Date |
|---|---|
| CN119628386A true CN119628386A (en) | 2025-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202411507018.0A Pending CN119628386A (en) | 2024-10-28 | 2024-10-28 | A medium frequency power supply with multiple power supplies |
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| Country | Link |
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| CN (1) | CN119628386A (en) |
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- 2024-10-28 CN CN202411507018.0A patent/CN119628386A/en active Pending
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