CN211506191U - Intermediate frequency auxiliary converter simulation system - Google Patents
Intermediate frequency auxiliary converter simulation system Download PDFInfo
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- CN211506191U CN211506191U CN202020573367.3U CN202020573367U CN211506191U CN 211506191 U CN211506191 U CN 211506191U CN 202020573367 U CN202020573367 U CN 202020573367U CN 211506191 U CN211506191 U CN 211506191U
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Abstract
The utility model provides an intermediate frequency auxiliary converter simulation system, the system includes host computer, emulation machine, signal conversion interface arrangement and intermediate frequency auxiliary control ware, host computer and emulation machine communication connection, the emulation machine respectively with signal conversion interface arrangement with intermediate frequency auxiliary control ware is connected, signal conversion interface arrangement with intermediate frequency auxiliary control ware is connected. The embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system has reduced intermediate frequency auxiliary converter's test cost.
Description
Technical Field
The utility model relates to an automatic test technical field, concretely relates to intermediate frequency auxiliary converter simulation system.
Background
The auxiliary converter is an important vehicle-mounted device of the railway vehicle and can provide an alternating current power supply for three-phase loads and partial single-phase loads of a finished vehicle air conditioner, an air compressor and the like.
The traditional auxiliary converter mostly adopts the working modes of power frequency transformer isolation and hard switching of a switching device, the middle-frequency auxiliary converter appears in the prior art, and the working modes of middle-frequency transformer isolation (5 kHz-100 kHz) and soft switching of the switching device are adopted, so that the auxiliary converter has the advantages of reducing the system loss and the volume and weight of the system compared with the traditional auxiliary converter. However, compared with the traditional auxiliary converter, the intermediate frequency auxiliary converter has more conversion links in the main loop topology, such as a DC/DC conversion module, an H-bridge inverter module, a diode rectifier module, and the like, the system is more complex as a whole, the voltage and current waveforms of the intermediate frequency auxiliary converter to be measured need to be detected and recorded in real time in addition to providing a controllable external power supply environment and a load environment in the whole machine test stage, higher requirements are provided for the test environment, test equipment and the number of testers, and the test cost of the product is increased.
SUMMERY OF THE UTILITY MODEL
To problem among the prior art, the embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system can solve the problem that exists among the prior art at least partially.
The embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system, including host computer, emulation machine, signal conversion interface arrangement and intermediate frequency auxiliary control ware, wherein:
the upper computer is in communication connection with the simulation machine, the simulation machine is respectively connected with the signal conversion interface device and the intermediate frequency auxiliary controller, and the signal conversion interface device is connected with the intermediate frequency auxiliary controller.
The simulator comprises a first simulation board card, a second simulation board card, a digital signal processing board card and an Ethernet interface, wherein the first simulation board card, the second simulation board card, the digital signal processing board card and the Ethernet interface are connected through a bus, the digital signal processing board card is connected with a signal conversion interface device, and the Ethernet interface is connected with the upper computer in a communication mode.
The first simulation board card comprises a CPU simulation board card circuit.
The second simulation board card comprises an FPGA simulation board card circuit.
Wherein, the bus adopts a compact PCI bus.
The intermediate frequency auxiliary controller comprises a power interface, a pulse signal interface, a digital signal interface, an analog signal interface and a control panel, wherein the power interface is connected with the control panel, the control panel is respectively connected with the pulse signal interface, the digital signal interface and the analog signal interface, the pulse signal interface and the digital signal interface are connected with the simulator, and the analog signal interface is connected with the signal conversion interface device.
The control panel adopts a DSP board card.
Wherein the signal conversion interface device comprises a digital-to-analog converter.
The intermediate frequency auxiliary converter simulation system provided by the embodiment of the utility model comprises an upper computer and a simulator, the upper computer is in communication connection with the simulator, the simulator is respectively connected with the signal conversion interface device and the intermediate frequency auxiliary controller, the signal conversion interface device is connected with the intermediate frequency auxiliary controller, the simulator loads a preset intermediate frequency auxiliary converter simulation model and outputs digital simulation signals, the signal conversion interface device converts the digital simulation signals into analog simulation signals and sends the analog simulation signals to the intermediate frequency auxiliary controller, the intermediate frequency auxiliary controller generates pulse signals and digital control signals according to the analog simulation signals and feeds the pulse signals and the digital control signals back to the simulator, and the upper computer obtains simulation waveforms according to the digital simulation signals, so that simulation test of the intermediate frequency auxiliary converter is realized, test equipment and testers are saved, and the test cost of the intermediate frequency auxiliary converter is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts. In the drawings:
fig. 1 is a schematic structural diagram of an intermediate frequency auxiliary converter simulation system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a main circuit of a typical intermediate frequency auxiliary converter according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an intermediate frequency auxiliary converter simulation system according to another embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an intermediate frequency auxiliary converter simulation system according to still another embodiment of the present invention.
Fig. 5a is a schematic diagram of an inverter current waveform of the experimental set according to an embodiment of the present invention.
Fig. 5b is a schematic diagram of an inverter current waveform of the intermediate frequency auxiliary converter model according to an embodiment of the present invention.
Fig. 6a is a schematic diagram of an inverter voltage waveform of the experimental set according to an embodiment of the present invention.
Fig. 6b is a schematic diagram of an inverter voltage waveform of an intermediate frequency auxiliary converter model according to an embodiment of the present invention.
Description of reference numerals:
1-an upper computer; 2-a simulator;
3-signal conversion interface means; 4-intermediate frequency auxiliary controller;
21-a first emulation board card; 22-a second emulation board card;
23-a digital signal processing board card; 24-an ethernet interface;
25-a bus; 41-power interface;
42-pulse signal interface; 43-digital signal interface;
44-analog signal interface; 45-control panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Fig. 1 is an embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system's structural schematic diagram, as shown in fig. 1, the embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system, including host computer 1, emulation machine 2, signal conversion interface arrangement 3 and intermediate frequency auxiliary controller 4, wherein:
the upper computer 1 is in communication connection with the simulator 2, the simulator 2 is respectively connected with the signal conversion interface device 3 and the intermediate frequency auxiliary controller 4, and the signal conversion interface device 3 is connected with the intermediate frequency auxiliary controller 4.
The simulation machine 2 is used for loading a preset intermediate frequency auxiliary converter simulation model and outputting a digital simulation signal, the signal conversion interface device 3 is used for converting the digital simulation signal into an analog simulation signal and sending the analog simulation signal to the intermediate frequency auxiliary controller 4, the intermediate frequency auxiliary controller 4 is used for generating a pulse signal and a digital control signal according to the analog simulation signal and feeding the pulse signal and the digital control signal back to the simulation machine 2, and the upper computer 1 is used for obtaining a simulation waveform according to the digital simulation signal.
Specifically, intermediate frequency auxiliary converter simulation model can be built based on intermediate frequency auxiliary converter main circuit diagram, and fig. 2 is the utility model discloses a typical intermediate frequency auxiliary converter's that an embodiment provided main circuit diagram intention, as shown in fig. 2, intermediate frequency auxiliary converter can include preceding stage Boost circuit, middle resonant converter circuit and back level inverter circuit, and preceding stage Boost circuit includes Boost circuit, and middle resonant converter circuit includes H bridge inverter circuit, and back level inverter circuit includes three-phase inverter circuit. When the simulation model of the intermediate frequency auxiliary converter is operated on the simulator 2, the direct current input voltage, the boost inductive current, the boost direct current voltage 1 and the boost direct current 2 of the preceding stage booster circuit can be output, the inverted direct current voltage of the intermediate resonant converter circuit can be output, and the output current 1, the output current 2, the output current 3, the output line voltage 1 and the output line voltage 2 of the subsequent stage inverter circuit can be output. The intermediate frequency auxiliary converter simulation model can be built on the upper computer 1 and compiled and downloaded to the simulator 2. The simulation machine 2 and the upper computer 1 can be connected through Ethernet communication.
The simulator 2 operates the simulation model of the intermediate frequency auxiliary converter and outputs the digital simulation signal, wherein the digital simulation signal may include a boost inductive current, a direct current input voltage, a boost direct current voltage 1 and a boost direct current voltage 2 of a preceding stage boost circuit, an inverted direct current voltage of a middle resonant converter circuit, an output current 1, an output current 2, an output current 3, an output voltage 1 and an output voltage 2 of a later stage inverter circuit. The signal conversion interface device 3 receives the digital simulation signal output by the simulator 2, converts the digital simulation signal into an analog simulation signal, and transmits the analog simulation signal to the intermediate frequency auxiliary controller 4.
After receiving the analog simulation signal, the intermediate frequency auxiliary controller 4 feeds back a digital control signal and a pulse signal to the simulator 2 according to a preset simulation control program and the received analog simulation signal, and drives an intermediate frequency auxiliary converter simulation model on the simulator 2 to operate, so that simulation of the intermediate frequency auxiliary converter is realized. The simulator 2 can also upload the generated digital simulation signals to the upper computer 1, and the upper computer 1 converts the digital simulation signals into corresponding simulation waveforms to be displayed through a display screen, so that real-time observation is facilitated. The upper computer 1 can also modify relevant parameters of the simulation model of the intermediate frequency auxiliary converter and the operation mode of the model, such as real-time adjustment of input voltage, change of responsibility, simulation of main circuit faults and the like. Wherein, the emulation control procedure of predetermineeing in the intermediate frequency auxiliary control ware 4 sets up according to actual need, the embodiment of the utility model provides a do not restrict.
The embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system has two signal return circuits at the simulation in-process.
The first signal loop: the intermediate frequency auxiliary controller 4 → the signal conversion interface device 3 → the simulation machine 2; the second signal loop: the simulator 2 → the signal conversion interface device 3 → the intermediate frequency auxiliary controller 4.
The first signal loop realizes the control signal transmission of the intermediate frequency auxiliary controller 4, so that the intermediate frequency auxiliary converter simulation model operates under the control of the digital control signal and the pulse signal output by the intermediate frequency auxiliary controller 4, and the data similar to the operation of the real intermediate frequency auxiliary converter is solved. The second signal loop realizes the feedback of simulation data, and feeds back the running state of the intermediate frequency auxiliary converter, which is obtained by real-time calculation of the intermediate frequency auxiliary converter simulation model, to the intermediate frequency auxiliary controller 4, so as to realize the closed loop of a control signal and a feedback signal. The closed loop reflects the functions that the intermediate frequency auxiliary control system of the real intermediate frequency auxiliary converter transmits a control signal to the main circuit of the real intermediate frequency auxiliary converter and each sensor feeds back a signal to the intermediate frequency auxiliary control system.
The intermediate frequency auxiliary converter simulation system provided by the embodiment of the utility model comprises an upper computer and a simulator, the upper computer is in communication connection with the simulator, the simulator is respectively connected with the signal conversion interface device and the intermediate frequency auxiliary controller, the signal conversion interface device is connected with the intermediate frequency auxiliary controller, the simulator loads a preset intermediate frequency auxiliary converter simulation model and outputs digital simulation signals, the signal conversion interface device converts the digital simulation signals into analog simulation signals and sends the analog simulation signals to the intermediate frequency auxiliary controller, the intermediate frequency auxiliary controller generates pulse signals and digital control signals according to the analog simulation signals and feeds the pulse signals and the digital control signals back to the simulator, and the upper computer obtains simulation waveforms according to the digital simulation signals, so that simulation test of the intermediate frequency auxiliary converter is realized, test equipment and testers are saved, and the test cost of the intermediate frequency auxiliary converter is reduced.
Fig. 3 is the structural schematic diagram of the auxiliary converter simulation system of intermediate frequency that another embodiment of the present invention provides, as shown in fig. 3, on the basis of each of the above embodiments, further, the simulation machine 2 includes the first emulation integrated circuit board 21, the second emulation integrated circuit board 22, the digital signal processing integrated circuit board 23 and the ethernet interface 24, the first emulation integrated circuit board 21, the second emulation integrated circuit board 22, the digital signal processing integrated circuit board 23 and the ethernet interface 24 are connected through the bus 25, the digital signal processing integrated circuit board 23 is connected with the signal conversion interface device 3, and the ethernet interface 24 is connected with the upper computer 1 in a communication manner.
Specifically, according to different requirements for simulation step lengths, a preceding stage boost circuit and an intermediate resonant converter circuit of the intermediate frequency auxiliary converter simulation model may be downloaded to the first simulation board 21, and an intermediate resonant converter circuit of the intermediate frequency auxiliary converter simulation model may be downloaded to the second simulation board 22. The digital simulation signals generated by the first simulation board card 21 and the second simulation board card 22 are transmitted to the signal conversion interface device 3 through the digital signal processing board card 23. The digital simulation signal can be uploaded to the upper computer 1 through an Ethernet interface. The ethernet interface 24 may be integrated on the first emulation board 21.
On the basis of the above embodiments, further, the first simulation board 21 includes a CPU simulation board circuit to operate the preceding stage boost circuit and the intermediate resonant converter circuit of the simulation model of the intermediate frequency auxiliary converter. The CPU simulation board circuit can provide real-time settlement of models with relatively long simulation step length and task scheduling for other simulation boards.
On the basis of the above embodiments, further, the second simulation board 22 includes an FPGA simulation board circuit to operate the intermediate resonant converter circuit of the simulation model of the intermediate frequency auxiliary converter. The FPGA simulation board card circuit can provide real-time settlement of a model with relatively short simulation step length.
In addition to the above embodiments, the bus 25 of the simulation machine 2 may adopt a Compact Peripheral Component Interconnect (CPCI) bus.
Fig. 4 is a schematic structural diagram of an intermediate frequency auxiliary converter simulation system according to still another embodiment of the present invention, as shown in fig. 4, on the basis of the above embodiments, further, the intermediate frequency auxiliary controller 4 includes a power interface 41, a pulse signal interface 42, a digital signal interface 43, an analog signal interface 44 and a control panel 45, the power interface 41 is connected to the control panel 45, the control panel 45 is respectively connected to the pulse signal interface 42, the digital signal interface 43 and the analog signal interface 44, the pulse signal interface 42 and the digital signal interface 43 are connected to the simulator, and the analog signal interface 44 is connected to the signal conversion interface device 3.
Specifically, the power interface 41 is externally connected to a power supply to supply power to the intermediate frequency auxiliary controller 4. The analog signal interface 44 receives the analog simulation signal from the signal conversion interface device 3 and transmits the analog simulation signal to the control board 45, the control board 45 is preset with a simulation control program, the control board 45 outputs a digital control signal to the digital signal interface 43 based on the analog simulation signal and the simulation control program and outputs a pulse signal to the pulse signal interface 42, the digital signal interface 43 transmits the digital control signal to the simulator 2, and the pulse signal interface 42 transmits the pulse signal to the simulator 2. The digital signal is mainly used for controlling circuit switches of simulation models of the intermediate frequency auxiliary converter, such as K1 and K0 shown in fig. 2. The pulse signal can include boost circuit drive pulse, H bridge contravariant drive pulse and three-phase contravariant drive pulse, boost circuit drive pulse is used for driving the IGBT unit of Boos boost circuit that preceding stage boost circuit of intermediate frequency auxiliary converter simulation model includes, H bridge contravariant drive pulse is used for driving the IGBT unit of H bridge contravariant circuit that intermediate resonant converter circuit of intermediate frequency auxiliary converter simulation model includes, three-phase contravariant drive pulse is used for driving the IGBT unit of three-phase contravariant circuit that later stage contravariant circuit of intermediate frequency auxiliary converter simulation model includes.
On the basis of the above embodiments, further, the control board 45 may adopt a DSP board.
On the basis of the above embodiments, the signal conversion interface device 3 further includes a digital-to-analog converter, an input end of the digital-to-analog converter is connected to the simulation machine 2, an output end of the digital-to-analog converter is connected to the intermediate frequency auxiliary controller 4, and the digital-to-analog converter is configured to convert the received digital simulation signal into an analog simulation signal. Digital analog converter selects according to actual need, the embodiment of the utility model provides a do not restrict.
In order to establish the utility model provides an intermediate frequency auxiliary converter simulation system at first carries out detailed analysis to intermediate frequency auxiliary converter control system's peripheral environment and interface, confirms its external interface, for example: the number of the voltage/current sensors, the number of the digital quantity input/output and the number of the PWM pulse output/feedback, thereby providing corresponding requirements for the configuration of the board card of the simulator. Secondly, a signal conversion interface device is required to be arranged according to the interface requirements of the intermediate frequency auxiliary controller and the simulator. And then, respectively building simulation circuit models such as a front-stage booster circuit, an intermediate resonant converter circuit, a rear-stage inverter circuit and the like based on the main circuit result of the intermediate frequency auxiliary converter according to the principle of modular modeling, and downloading the simulation circuit models to a simulator. And then, completing the connection of the upper computer, the simulator, the signal conversion interface device and the intermediate frequency auxiliary controller which are included in the intermediate frequency auxiliary converter simulation system. And finally, checking the accuracy of the simulation system of the intermediate frequency auxiliary converter by using the simulation waveform of the obtained digital simulation signal and the test data of the existing experimental unit.
The embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system can realize the emulation and the analysis to intermediate frequency auxiliary converter electric characteristic in the operation process. Various data in the test process can be uploaded to an upper computer through the Ethernet, so that the upper computer is utilized to observe the simulation waveform in real time.
Fig. 5a is the inverter current waveform schematic diagram of the experimental unit that an embodiment of the utility model provides, fig. 5b is the utility model discloses an embodiment provides an inverter current waveform schematic diagram of intermediate frequency auxiliary converter model compares the inverter current waveform among 5a and 5b, can know the operating condition of accurate reflection experimental unit in certain degree of intermediate frequency auxiliary converter model, explains the utility model provides an intermediate frequency auxiliary converter simulation system is accurate to inverter current's emulation. The inverter current 1, the inverter current 2, and the inverter current 3 in fig. 5b correspond to the output current 1, the output current 2, and the output current 3 in fig. 2, respectively. The experimental unit is equipment for carrying out experiments by adopting a real intermediate frequency auxiliary converter.
Fig. 6a is the inverter voltage waveform schematic diagram of the experimental unit that an embodiment provided, fig. 6b is the utility model relates to an embodiment provides an inverter voltage waveform schematic diagram of the intermediate frequency auxiliary converter model, compares the inverter current waveform among fig. 6a and fig. 6b, can know the operating condition of accurate reflection experimental unit in certain degree of intermediate frequency auxiliary converter model, explains the utility model provides an intermediate frequency auxiliary converter simulation system is accurate to inverter voltage's emulation. In fig. 6b, inverter line voltage 1 and inverter line voltage 2 correspond to output line voltage 1 and output line voltage 2 in fig. 2, respectively.
The embodiment of the utility model provides an intermediate frequency auxiliary converter simulation system possesses following advantage for traditional intermediate frequency auxiliary converter test means in kind and current auxiliary system simulation experiment means:
(1) the test environment is low in cost, the test means is simple and flexible, and the model parameters can be changed on line through the upper computer monitoring system according to the specific requirements of test points, so that the model operation mode can be adjusted in real time.
(2) Because the intermediate frequency auxiliary converter is a virtual model, the fault test cost and risk are reduced, and the labor and time cost in the test process is reduced. The simulation test software is used for secondary development, so that real-time adjustment of circuit parameters and control parameters in the test process can be realized, and meanwhile, the simulation test software has a real-time data recording function and can improve the analysis efficiency of test results.
(3) The method can realize the electrical characteristic model simulation of the main circuit of the intermediate frequency auxiliary converter, and ensure that the model simulation step length is less than 1 microsecond. The real-time simulator is provided with the FPGA board card, so that the simulation step length is greatly reduced, the iterative computation frequency of the discrete model is improved, and the model is closer to reality.
(4) The FPGA board card that the emulation machine was equipped with is from taking modules such as DA, AD, DIO, PWM and catching and speed encoder, and the model of the supplementary converter of intermediate frequency and all kinds of sensors of being convenient for is established.
(5) By analyzing the fault model, the simulation of the operating characteristics of the intermediate frequency auxiliary converter under various fault conditions can be realized, the control margin and the protection function of the intermediate frequency auxiliary control system under the limit condition can be conveniently analyzed, and the operation safety of train equipment is improved.
In the description herein, reference to the description of the terms "one embodiment," "a particular embodiment," "some embodiments," "for example," "an example," "a particular example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The utility model provides an intermediate frequency auxiliary converter simulation system which characterized in that, includes host computer, emulation machine, signal conversion interface arrangement and intermediate frequency auxiliary control ware, wherein:
the upper computer is in communication connection with the simulation machine, the simulation machine is respectively connected with the signal conversion interface device and the intermediate frequency auxiliary controller, and the signal conversion interface device is connected with the intermediate frequency auxiliary controller.
2. The system of claim 1, wherein the simulation machine comprises a first simulation board card, a second simulation board card, a digital signal processing board card and an ethernet interface, the first simulation board card, the second simulation board card, the digital signal processing board card and the ethernet interface are connected through a bus, the digital signal processing board card is connected with the signal conversion interface device, and the ethernet interface is in communication connection with the upper computer.
3. The system of claim 2, wherein the first emulation board comprises a CPU emulation board circuit.
4. The system of claim 2, wherein the second emulation board comprises an FPGA emulation board circuit.
5. The system of claim 2, wherein the bus is a compact PCI bus.
6. The system of claim 1, wherein the intermediate frequency auxiliary controller comprises a power interface, a pulse signal interface, a digital signal interface, an analog signal interface and a control board, the power interface is connected to the control board, the control board is respectively connected to the pulse signal interface, the digital signal interface and the analog signal interface, the pulse signal interface and the digital signal interface are connected to the simulator, and the analog signal interface is connected to the signal conversion interface device.
7. The system of claim 6, wherein the control board is a DSP board.
8. The system of any one of claims 1 to 7, wherein said signal conversion interface means comprises a digital to analog converter.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111367198A (en) * | 2020-04-17 | 2020-07-03 | 中国铁道科学研究院集团有限公司 | Intermediate frequency auxiliary converter simulation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111367198A (en) * | 2020-04-17 | 2020-07-03 | 中国铁道科学研究院集团有限公司 | Intermediate frequency auxiliary converter simulation system |
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