CN214412406U - Novel open-source real-time testing platform for motor frequency converter - Google Patents
Novel open-source real-time testing platform for motor frequency converter Download PDFInfo
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- CN214412406U CN214412406U CN202120618510.0U CN202120618510U CN214412406U CN 214412406 U CN214412406 U CN 214412406U CN 202120618510 U CN202120618510 U CN 202120618510U CN 214412406 U CN214412406 U CN 214412406U
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Abstract
A novel open source real-time test platform for a motor frequency converter comprises a real-time simulation controller, wherein the real-time simulation controller is connected with a PC (personal computer) machine through an Ethernet, and is connected with a tested frequency converter through an Ethernet, RS485 or CAN (controller area network), an alternating current RST (rapid-reset) inlet of the tested frequency converter is connected with 380V three-phase electricity, a direct current port of the tested frequency converter is connected with a direct current port of an open source DCAC bidirectional converter, the open source DCAC bidirectional converter is connected with a UVW (ultraviolet W) output port of the tested frequency converter through a filter, and a PG (program control) card of the tested frequency converter is connected with the real-time simulation controller; and the open-source DCAC bidirectional converter is in signal connection with the real-time simulation controller. The utility model overcomes prior art's is not enough for the torque and rotation speed output control performance of test motor converter under facing different grade type, the motor of different power under the different work condition.
Description
Technical Field
The utility model relates to a converter test technical field, concretely relates to novel motor converter open source real-time test platform.
Background
With the continuous promotion of industrialization, electrification and automation, the motor plays a key role in the industries of transportation, mining, construction, textile and the like. In different application scenarios, the motors have different types, different powers and different working conditions, and the most common motor types are asynchronous motors and permanent magnet synchronous motors, so that frequency converter manufacturers also mainly develop and popularize the motors. With the increasingly subdivided application occasions of the equipment, industrial products have higher quality requirements, so that the frequency converter has more severe test requirements when leaving a factory, all powers of the motor type covered by the product in a power section need to be tested, and the loaded working condition needs to be simulated, so that the quality of the equipment can be better shown, and higher-quality service is provided for specific users.
One of the most common testing devices is the motor-driven platform, which can test the working state of the frequency converter under real current, but has the following defects: (1) the equipment has a certain degree of mechanical potential safety hazard; (2) the system is complex and difficult to maintain; (3) failure simulation is difficult to perform; (4) the type, power and parameters of a motor to be tested of the built rack are unchangeable; (5) only a motor, an inertia disc or a hysteresis brake can be used for simulating some common types of loads, and the load types with multiple degrees of freedom are difficult to simulate. Meanwhile, when the controller is developed, the signal level test method is adopted, so that not only can a driver, a motor and any load be simulated, but also the type, power and parameters of the motor can be completely matched, and meanwhile, the potential safety hazard is avoided, and the maintenance is convenient; however, this method cannot test the operation state under the real current because it is signal-level, which is not testable for the driving part of the frequency converter. And a power level test mode is adopted, mechanical safety hidden dangers are avoided and maintenance difficulty is reduced by removing mechanical parts, and any load characteristics, system faults and types, power and parameters of the motor to be tested can be simulated in a real current testable state by an information level current control mode.
Along with the application of novel motors and special working conditions, the requirements of the types of the motors to be tested and the working conditions of the applications are increasingly rich, and in the existing power-level frequency converter testing equipment, a mode based on DSP/FPGA bottom layer development and upper computer communication control is mostly adopted, and the mode can be completed only by providing customization requirements for manufacturers in the development process.
SUMMERY OF THE UTILITY MODEL
The utility model provides a novel motor converter open source real-time test platform, overcome the not enough of prior art, reasonable in design for the torque and speed output control performance of test motor converter under facing different operating mode at the motor of different grade type, different power.
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a novel open source real-time test platform for a motor frequency converter comprises a real-time simulation controller, wherein the real-time simulation controller is connected with a PC (personal computer) machine through an Ethernet, and is connected with a tested frequency converter through the Ethernet, RS485 or CAN; and the open-source DCAC bidirectional converter is in signal connection with the real-time simulation controller.
Preferably, an analog quantity voltage signal of the open-source DCAC bidirectional converter is connected to the real-time simulation controller, and a DIO signal of the open-source DCAC bidirectional converter is connected with the real-time simulation controller through a signal adapter plate.
Preferably, the DIO signal includes PWM, a fault signal and an enable signal.
The utility model provides a novel motor converter open source real-time test platform. The method has the following beneficial effects: the electric structure of the open-source DCAC bidirectional converter and the filter is adopted, alternating current and direct current power interfaces connected with the frequency converter to be tested are provided, and compared with a traditional platform using a mechanical type, the electric structure not only enables different working conditions to be realized, but also improves the safety of an experimental electric environment; and adopt real-time simulation controller and signal keysets at the signal aspect, firstly, for being surveyed the converter provide common encoder type signals such as ABZ incremental encoder, rotary encoder, CAN test the encoder integrated circuit board, secondly, CAN provide PWM signal and electric current collection passageway with the electrical structure that provides, extend the development for the user oneself and provide the interface, in addition, carry out CAN, RS and ethernet communication with being surveyed the converter, not only CAN remote operation, avoid personnel's on-the-spot risk, and CAN test the communication integrated circuit board.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the description of the prior art will be briefly described below.
FIG. 1 is a schematic structural view of the present invention;
the reference numbers in the figures illustrate:
1. a real-time simulation controller; 2. a PC machine; 3. a frequency converter to be tested; 4. an open source DCAC bidirectional converter; 5. a filter; 6. a signal transfer board; 7. and (5) measurement and control software.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention will be combined below to clearly and completely describe the technical solutions of the present invention.
As shown in fig. 1, a novel open-source real-time testing platform for a motor frequency converter comprises a real-time simulation controller 1, wherein the real-time simulation controller 1 is connected with a PC 2 through an ethernet, the real-time simulation controller 1 is connected with a tested frequency converter 3 through an ethernet, an RS485 or a CAN, an ac RST inlet of the tested frequency converter 3 is connected with a 380V three-phase power, a dc port of the tested frequency converter 3 is connected with a dc port of an open-source DCAC bidirectional converter 4, the open-source DCAC bidirectional converter 4 is connected with a UVW output port of the tested frequency converter 3 through a filter 5, and a PG card of the tested frequency converter 3 is connected with the real-time simulation controller 1;
in this embodiment, analog voltage signals such as input and output voltage and current of the open-source DCAC bidirectional converter 4 are connected to the real-time simulation controller 1, and DIO signals such as PWM, fault signal and enable signal of the open-source DCAC bidirectional converter 4 are connected to the real-time simulation controller 1 through the signal adapter board 6.
A user obtains an sdf compiling file after graphical programming and compiling are carried out on the PC machine 2, the sdf compiling file is downloaded to the real-time simulation controller 1 through the Ethernet, the measurement and control software 7 in the PC machine 2 can be connected with the real-time simulation controller 1, and the sdf compiling file downloaded to the real-time simulation controller 1 by the user is loaded, so that the frequency converter test can be carried out in real time; the electric structure is three-phase output, so that the frequency converter 3 is suitable for the tested motor of the three-phase output type, namely suitable for drivers configured by motors such as a permanent magnet synchronous motor, an asynchronous motor, a linear motor and the like, and can be suitable for different operation scenes of the motors through model editing.
At the time of operation,
the user sets experimental working conditions on the measurement and control software 7 of the PC 2 through instructions, can select the type, power and internal parameters of the motor and the real-time operation working conditions of external loads in real time, and the information is loaded into the real-time simulation controller 1 through the Ethernet; when a user controls the frequency converter, the user CAN select control modes developed by the frequency converters such as V/F, FOC and DTC, and set expected torque, expected rotating speed and other control parameters, the settings are transmitted to a communication card of the tested frequency converter 3 by the real-time simulation controller 1 in a CAN communication, Ethernet or RS485 mode for mode setting, and the tested frequency converter CAN also upload information such as torque and rotating speed to an upper computer by the mode;
in the control process, the real-time simulation controller 1 carries out real-time regulation on output voltage and rotation speed according to set motor information, load information and alternating current, so that the frequency converter to be tested can output current with frequency change and amplitude change under different alternating-current side potentials according to received coding information, and performance tests of functions of rotation speed, torque control and the like of the motor frequency converter under different types of motors, different power motors and different load working conditions are completed;
when the motor testing device is used in testing, information such as output current, motor back electromotive force, torque, rotating speed and position of a tested motor can be displayed in real time, and parameters, power and load working conditions of a driven motor can be adjusted on an interface, so that real-time and visual testing requirements are met.
According to the application, the electrical structure of the open-source DCAC bidirectional converter 4 and the filter 5 is adopted, the alternating current and direct current power interfaces connected with the tested frequency converter 3 are provided, and compared with a traditional mechanical platform, the experimental device not only enables different working conditions to be realized for the sake of possibility, but also improves the safety of the experimental electrical environment; and adopt real-time simulation controller 1 and signal keysets 6 in the signal aspect, firstly, for being surveyed converter 3 provides common encoder type signals such as ABZ incremental encoder, rotary encoder, CAN test the encoder integrated circuit board, secondly, CAN provide PWM signal and electric current collection channel with the electrical structure that provides, extend the development for the user oneself and provide the interface, in addition, carry out CAN, RS485 and ethernet communication with being surveyed the converter, not only CAN remote operation, avoid personnel's on-the-spot risk, and CAN test the communication integrated circuit board.
In this embodiment, the real-time simulation controller 1 employs a microllabbox of desbys, which includes GNU compiler, CDP control development software package, RTICAN interface module, rteothernet ethernet interface template, 1302T hardware. The voltage acquisition device is used for acquiring voltage signals output by processing each path of voltage and current sensor in the provided electrical structure; collecting a driving fault signal, an overvoltage signal, an overcurrent signal and an overtemperature signal which are switched by the signal switching board 6, and outputting a PWM signal, an enable signal thereof, a fault reset signal and the like; carrying out real-time communication with the frequency converter to be tested; outputting signals required by a PG card of a frequency converter such as a rotary transformer, an incremental encoder, an absolute encoder and the like; and is used to connect with the PC 2 via ethernet so that the test software can display the variables in real time.
Real-time simulation control mode that its adopted possesses real-time collection, calculation and the control ability of DSP/FPGA, and it needs loaded down with trivial details code programming mode for the tradition, based on the imaging to programme, makes the user accomplish Matlab/Simulink theoretical simulation and verifies the back, can the utility model discloses a observe and control software goes up the quick conversion with it to carry out the experiment in kind and test, promoted the efficiency of theoretical verification to the experiment in kind conversion effectively.
In the embodiment, the signal adapter board 6 adopts SD800-1202 of Unitech, has a digital signal isolation protection function, can be compatible with a specified real-time simulation controller, has no less than 32 analog acquisition signals and no less than 16 output analog voltage signals; the PWM signal is not less than 24 paths, 5V/20mA is adopted, and the dead time is about 2 us; the digital signal/switching value input is not less than 10 paths and 5V/20mA, and the differential signal input is not less than 6 pairs and 5V/20 mA. The signal interface form of the adaptive open source DCAC bidirectional converter 4, the filter 5 and the real-time simulation controller 1 is adopted; the DIO digital signal channel used for protecting the real-time simulation controller 1 is not damaged due to connection with the outside, and long-term after-sale maintenance time is avoided; the stability and the immunity of high-precision digital signals such as an encoder, PWM and the like are improved by adopting digital signal processing modes such as isolation optimization and the like; the method adopts a customized hardware dead zone setting mode to save channels for the measurement and control system and reduce the set range of software dead zones.
In the embodiment, the open-source DCAC bidirectional converter 4 adopts the SD800 series of Unitech, and a two-level three-phase half-bridge four-arm, and supports the control of various motors and the control of a micro-grid; the voltage sampling module comprises 7 paths of bus voltage 1 path, network voltage 3 paths and load voltage 3 paths; precision 1%, response time less than 40us, frequency 100Hz current sampling module (13 total ways): 1 bus current, 4 driver UVWN output currents, 4 network access current samples and 4 load current samples; precision 1%, response time is less than 1us, frequency 100KHz digital quantity DI input function module: 3-path high-speed/common bidirectional isolation input with the maximum frequency of 50 KHZ; digital quantity DO output function module: 3-path high-speed/common isolation output, the maximum frequency of 50KHZ, the current of 3A/AC250V and the current of 1A/DC 30V; and (4) protection function: braking function, bus overvoltage, UVW output current overcurrent, over-temperature protection and the like;
in this embodiment, the measurement and control software mainly includes functions of displaying, issuing, and storing data. In the form: (1) the data display comprises real-time numerical values, real-time curves and the like, the numerical values can be set into forms of tables, lists and the like, and the curves can be set with display step length, different variable comparison modes, color line types and the like; (2) the instruction issuing comprises the forms of real-time numerical value adjustment, curve variable adjustment, trigger judgment type modification, curve dragging and the like; (3) the data storage comprises the forms of measurement cache storage, Plotter display data storage, long-time recorder storage and the like. In operation, the sdf file of the simulink can be updated in real time, all intermediate variables of the controller in the simulink are connected, and the sdf files of different algorithms can be replaced quickly. The secondary development interface is displayed in real time in a curve and data mode on the PC, and meanwhile, control parameters and system parameters can be trimmed in real time, so that an intuitive experimental mode is provided, researchers can find problems in the research and development process quickly, and the current situation that the experimental process is not intuitive in the traditional mode can be effectively improved.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (3)
1. The utility model provides a novel real-time test platform of motor converter open source which characterized in that: the system comprises a real-time simulation controller (1), wherein the real-time simulation controller (1) is connected with a PC (2) through an Ethernet, the real-time simulation controller (1) is connected with a tested frequency converter (3) through the Ethernet, RS485 or CAN, an alternating current RST inlet of the tested frequency converter (3) is connected with 380V three-phase electricity, a direct current port of the tested frequency converter (3) is connected with a direct current port of an open-source DCAC bidirectional converter (4), the open-source DCAC bidirectional converter (4) is connected with a UVW output port of the tested frequency converter (3) through a filter (5), and a PG card of the tested frequency converter (3) is connected with the real-time simulation controller (1); the open-source DCAC bidirectional converter (4) is in signal connection with the real-time simulation controller (1).
2. The novel open-source real-time test platform for the motor frequency converter according to claim 1, characterized in that: analog quantity voltage signals of the open-source DCAC bidirectional converter (4) are connected into the real-time simulation controller (1), and DIO signals of the open-source DCAC bidirectional converter (4) are connected with the real-time simulation controller (1) through the signal adapter plate (6).
3. The novel open-source real-time test platform for the motor frequency converter according to claim 2, characterized in that: the DIO signals include PWM, fault signals, and enable signals.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120618510.0U CN214412406U (en) | 2021-03-26 | 2021-03-26 | Novel open-source real-time testing platform for motor frequency converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120618510.0U CN214412406U (en) | 2021-03-26 | 2021-03-26 | Novel open-source real-time testing platform for motor frequency converter |
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| CN214412406U true CN214412406U (en) | 2021-10-15 |
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| CN202120618510.0U Active CN214412406U (en) | 2021-03-26 | 2021-03-26 | Novel open-source real-time testing platform for motor frequency converter |
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