CN113281596A - Offline testing system and method for electric train vehicle traction system - Google Patents
Offline testing system and method for electric train vehicle traction system Download PDFInfo
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Abstract
The invention provides an off-line testing system and method for an electric train traction system, which comprises a controller power supply circuit, an FPGA logic control circuit, a DSP control chip, a processor module based on an ARMCortex-A8 kernel, an analog quantity signal processing circuit, an analog quantity signal sampling and threshold value comparing circuit, a digital quantity signal input and output circuit, an 8-circuit IGBT control circuit and a traction motor rotating speed detecting circuit. The control method comprises the following steps: and testing components of the traction system and testing the overall function and performance of the system. The invention has the advantages of soft and hard combination, convenient operation, automatic report generation and the like, and provides an intelligent controller and a method for the offline test of the traction system.
Description
Technical Field
The invention relates to the field of off-line testing of electric train vehicle traction systems, in particular to an off-line testing system and method of an electric train vehicle traction system.
Background
The electric train vehicle is an important component of urban rail transit, and the safe and stable operation of the electric train vehicle is very important. In order to ensure the safe and stable operation of the vehicle in the life cycle of the whole train within 30 years, the industry standard stipulates that the train is subjected to frame maintenance once every 5 years and overhaul once every 10 years.
The traction system of the electric train, namely the train power system, is one of the major maintenance objects in the process of frame overhaul as the heart of the electric train. To improve system stability, many critical components within the traction system must be replaced during a major repair. After overhaul, in order to ensure the normal overall function and performance of the traction system, the overall traction system needs to be tested off-line.
Patent document is CN 206609923U's utility model patent discloses a subway train pulls dc-to-ac converter high pressure and presses load test platform relates to rail transit traction system field, can judge the integrality of new delivery of factory contravariant module function through experimental, also can be used for discovering the fault information of contravariant module in the use, the utility model discloses a: DC1500V quiet power cabinet, high voltage power supply cabinet, filtering equipment, pull contravariant module, load, main inverter test console, its characterized in that, DC1500V quiet power cabinet of transferring is connected the high voltage power supply cabinet, filtering equipment is connected to the high voltage power supply cabinet, filtering equipment connects pull the contravariant module, pull the contravariant module and connect the three-phase load, the utility model is suitable for a be used for subway train to pull inverter high pressure (1500V DC) and take the load test. But the above scheme cannot realize off-line testing.
Disclosure of Invention
At present, the test of a traction system mainly adopts an on-line mode, namely the traction system is installed back on a train and is tested by using an original controller of the system. If the system after the overhaul operation fails in the fault test, the traction box body needs to be dropped into the box and returned to the overhaul workshop for operation again. The test function of the original controller is limited by the use of users, the test function can not be added or modified according to the requirements, and the test requirements can not be met under the characteristic condition.
Aiming at the defects in the prior art, the invention aims to provide an off-line testing system for a traction system of an electric train vehicle, which comprises a power management module, an FPGA module, a DSP chip, a processor module, an analog quantity acquisition and processing circuit, a digital IO circuit, an IGBT driving circuit and a motor rotating speed detection circuit, wherein:
the processor module is interacted with the DSP chip and the FPGA module through the SPI respectively and is used for data interaction;
the DSP chip is used for realizing control algorithm operation and interacting with the FPGA module data;
the analog quantity acquisition processing circuit acquires analog quantity data and sends the analog quantity data to the DSP chip and the FPGA module;
the FPGA module is respectively in communication connection with the digital IO circuit, the IGBT driving circuit and the motor rotating speed detection circuit;
the power management module is used for providing electric energy.
Preferably, the processor module comprises an ARMCortex-A8 chip.
Preferably, the power management module comprises power supplies +/-24V, +15V, 5V and 3.3V required by internal circuits of the controller, reference power supplies +/-2.5V, +5V and +10V required by a system, a power supply monitoring circuit, a controller starting circuit and a protection circuit.
Preferably, the FPGA module includes an FPGA chip, an EPCS serial FLASH chip, and an SRAM chip, wherein:
the FPGA chip comprises an NIOS-II soft core processor, a phase-locked loop frequency multiplier, an SDRAM read-write controller, an EPCS serial FLASH chip control interface, a digital logic control interface and an SPI interface;
the SDRAM chip is used as the memory of the FPGA embedded processor;
the EPCS serial FLASH chip is used as a program memory of the FPGA embedded processor and an EPCS controller for guiding program downloading and loading.
Preferably, the analog quantity acquisition processing circuit includes an analog quantity signal processing circuit, an AD sampling chip, a voltage-to-frequency conversion circuit, a DA chip, and a comparison circuit, wherein:
the analog quantity signal processing circuit is realized by an operational amplifier;
the AD sampling chip realizes the acquisition of analog quantity signals, and the acquired value participates in the control operation of the DSP chip;
the voltage-frequency conversion circuit realizes the conversion from an analog quantity signal to a digital frequency signal;
the DA chip realizes the dynamic setting of the threshold value;
the comparison circuit realizes comparison of the real-time value of the analog quantity and the threshold value.
Preferably, the digital IO circuit comprises an input circuit and an output circuit, wherein:
the output circuit consists of a comparator and a driving circuit, and realizes the output control of the energy relay of the traction system;
the input circuit is composed of a voltage division circuit and a buffer, and the state feedback function of the relay is achieved.
Preferably, the IGBT driver circuit includes a buffer, a driver circuit, and an optical fiber transmitter, wherein: the buffer is connected to the input end of the driving circuit, and the output end of the driving circuit is electrically connected with the optical fiber transmitter.
Preferably, the motor speed detection circuit includes a sensor power output and a pulse detection circuit.
The invention also provides an off-line testing method of the electric train vehicle traction system, which comprises the following steps:
a login step: logging in a controller control page;
and (3) state self-checking: detecting a 110V control power supply of the traction system, an internal power supply of a controller, an FPGA reset state and a DSP reset state;
a pre-charging contactor function testing step: controlling the pre-charging contactor to suck through a digital quantity signal output end; reading the attraction state of the pre-charging contactor through a digital quantity signal input end; reading 1500V main line voltage through an analog quantity signal input end; after the pre-charging capacitor is completed, disconnecting the pre-charging contactor;
and (3) a line contactor function test step: controlling the circuit contactor to suck through a digital quantity signal output end; reading the pull-in state of the line contactor through a digital quantity signal input end;
the method comprises the following steps of (1) testing the function of a discharge loop of the traction system: the output circuit is controlled through the IGBT, 2 paths of IGBTs of the discharge circuit are triggered to be conducted, and meanwhile, the current of the main line circuit is detected through the analog quantity signal input end, so that the function and the performance of the discharge circuit are analyzed and judged;
the method comprises the following steps of (1) testing the function of the high-speed circuit breaker: the high-speed circuit breaker is controlled to be closed through a digital quantity signal output end; reading the suction state of the high-speed circuit breaker through a digital quantity signal input end;
the method comprises the following steps of: the fan relay is controlled to be closed through the digital quantity signal output end; reading the suction state of a fan relay through a digital quantity signal input end;
the method comprises the following steps of: dynamically controlling a load motor of the traction system, and realizing the judgment of the function and the performance of a motor control loop by monitoring three-phase current, the motor speed and the main line power supply current in real time;
a report generation step: and generating a test report according to the test process and the test result.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can realize off-line test, and save manpower, material resources and time for secondary disassembly and assembly of the box body.
2. The invention can flexibly make a test strategy according to the requirement.
3. The invention can realize the test of all the components in the system, and the test is more comprehensive and detailed.
4. The invention has better universality, and can realize the test of traction systems of different vehicle types by modifying the interface.
5. Under the condition that the system is off-line, the invention can test the functions and the performances of the components and the whole in the traction system. Meanwhile, the test strategy can be added and modified according to specific requirements.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 is a schematic diagram of a system hardware structure of an off-line testing system of an electric train traction system.
FIG. 2 is a flow chart of steps of a method for off-line testing of a traction system of an electric train vehicle.
Fig. 3 is a schematic diagram of a test structure of an off-line test system of a traction system of an electric train vehicle.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1 to 3, the present invention provides an off-line testing system and method for a traction system of an electric train, wherein the system hardware comprises: the device comprises a controller power circuit, an FPGA logic control circuit, a DSP control chip, a processor module based on an ARMCortex-A8 kernel, an analog quantity signal processing circuit, an analog quantity signal sampling and threshold value comparing circuit, a digital quantity signal input and output circuit, an 8-circuit IGBT control circuit and a traction motor rotating speed detection circuit.
And the processor module is based on an ARMCortex-A8 kernel and realizes the data interaction function of the terminal and the traction control system. A Linux operating system is embedded in the module, and software control is realized through a front-end mode and a back-end mode of a WEB server. The system is connected with a terminal in an Internet network communication mode, and data interaction is carried out with the FPGA by utilizing an SPI interface. The module hardware circuit includes: the system comprises a processor chip, an SRAM (static random access memory) which is externally expanded from the processor, an FLASH which is externally expanded from the processor, an SD (secure digital) card, an Internet interface and an SPI (serial peripheral interface).
And the FPGA logic control part is used for realizing system digital quantity IO and logic control. The system adopts the SOPC technology, and an NIOS-II soft core processor, a phase-locked loop frequency multiplier, an SDRAM read-write controller, an EPCS serial FLASH chip control interface, a digital logic control interface and an SPI interface are embedded in the system. The externally expanded SDRAM chip is used as the memory of the FPGA embedded processor; the EPCS serial FLASH chip is used as a program memory of the FPGA embedded processor and an EPCS controller for guiding program downloading and loading. As an SPI slave controller, interacting with processor module data of an ARMCortex-A8 kernel; and the SPI master controller is used for data interaction with the DSP chip. In the invention, the functions of digital quantity signal input and output, 8-path IGBT control and traction motor rotating speed detection are realized by an FPGA logic control part.
And the DSP control chip is mainly used for realizing the operation function of the traction motor control algorithm. The DSP chip controls an AD chip through a parallel bus, and the AD chip selects a 12-bit 4-path differential synchronous sampling converter. The DSP chip is used for collecting three-phase current, main line current and main line voltage of the traction system in real time. Meanwhile, the DSP chip is used as an SPI slave controller to realize data interaction with the FPGA chip.
The controller power supply circuit comprises power supplies +/-24V, + -15V, 5V and 3.3V required by internal circuits of a controller, reference power supplies +/-2.5V, + -5V and +10V required by a system, a power supply monitoring circuit, a controller starting circuit and a protection circuit, and is specifically realized as follows:
and the controller main power supply is provided by a 110V control power supply in the traction system. The power supply +/-24V, + -15V and 5V required by the internal circuit of the controller is provided by a power supply module which conforms to EN50121 railway standard, the input voltage range of the power supply module is 55-176VDC, and the output power is 20W. And the +5V is input into an LM3940IS three-terminal linear voltage-stabilizing chip to generate a 3.3V power supply required in the controller.
The +5V reference power required by the controller is generated using the +15V input of the reference power generation chip REF195 GS. And the +5V reference power supply is divided into 2.5V voltage through two 10K resistors with the precision of 1%, the 2.5V divided voltage is input to the + end of the operational amplifier and follows the output, and the +2.5V reference power supply required in the controller is generated at the output end of the operational amplifier. A +5V reference power supply is input to the "-" end of the operational amplifier through a 20K resistor with 1% precision; the minus end of the operational amplifier is connected with the output end through a 10K resistor with 1% precision; the + end of the operational amplifier is connected with the ground through a 10K resistor with 1% precision; thus, at the output of the operational amplifier, the-2.5V reference supply required within the controller is generated. A +5V reference power supply is input to the "-" end of the operational amplifier through a 20K resistor with 1% precision; the minus end of the operational amplifier is connected with the output end through a 20K resistor with 1% precision; the + end of the operational amplifier is connected with the ground through a 10K resistor with 1% precision; the output end of the operational amplifier is amplified by a triode to generate a-5V reference power supply required by the controller. The +5V reference power supply is directly connected with the + end of the operational amplifier; the minus end of the operational amplifier is connected with the ground through a 20K resistor with 1% precision, and meanwhile, the minus end of the operational amplifier is connected with the output end of the operational amplifier through a 20K resistor with 1% precision, and the output end of the operational amplifier is amplified through a triode to generate a +10V reference power supply required by the controller.
Monitoring a power supply at 15V, and connecting the power supply at 15V to a minus end of a comparator after the power supply is subjected to voltage division by 10K and 2.2K resistors; the + end of the comparator is connected with a-2.5V reference power supply; when the-15V power supply is normal, the comparator outputs a high level; when the-15V power supply is larger than-13.8V, the comparison outputs low level. -24V power supply monitoring, -24V is connected to a "-" end of a comparator after being subjected to 40K and 5.1K resistor voltage division; the + end of the comparator is connected with a-2.5V reference power supply; when the 24V power supply is normal, the comparator outputs a high level; when the-24V power supply is larger than-22.1V, the comparison output is low level. Monitoring a 3.3V power supply, and connecting the 3.3V power supply to a + end of a comparator after the 3.3V power supply is subjected to voltage division by 0.524K and 2.2K resistors; the "-" end of the comparator is connected with a +2.5V reference power supply; when the 3.3V power supply is normal, the comparator outputs a high level; when the 3.3V power supply is less than 3.1V, the comparison outputs low level. Monitoring a 5V power supply, and connecting the 5V power supply to a + end of a comparator after voltage division is performed on the 5V power supply through 1.894K and 2.2K resistors; the "-" end of the comparator is connected with a +2.5V reference power supply; when the 5V power supply is normal, the comparator outputs a high level; when the 5V power supply is less than 4.65V, the comparison outputs low level. The +15V power supply is monitored, and after the +15V is subjected to voltage division by 9.78K and 2.2K resistors, the +15V is connected to a + end of the comparator; the "-" end of the comparator is connected with a +2.5V reference power supply; when the +15V power supply is normal, the comparator outputs high level; when the +15V power supply is less than 13.61V, the comparison outputs a low level. The +24V power supply is monitored, and after the +24V is subjected to voltage division by 40K and 5.1K resistors, the +24V is connected to a + end of the comparator; the "-" end of the comparator is connected with a +2.5V reference power supply; when the +24V power supply is normal, the comparator outputs a high level; when the +24V power supply is less than 22.11V, the comparison outputs a low level.
And a power supply protection circuit. The output ends of the comparators in all the power supply monitoring circuits are connected in an 'wired-and' mode.
When the monitored power supply is in a normal range, the line and the circuit are in high level; as long as one path of the monitored power supply is abnormal, the line and the line are low. When the line and the circuit are low, the DSP chip and the FPGA chip are triggered to reset, the output of the 8-path IGBT driving transmitter is blocked, and meanwhile, the control output ends of all relays and contactors in the traction system are blocked.
The analog quantity signal processing, sampling and threshold value comparing circuit comprises a processing circuit for processing an analog quantity signal output by a sensor in a traction system, an AD sampling chip, a voltage-frequency conversion circuit, a DA chip and a comparing circuit; the analog quantity signal processing is realized by an operational amplifier; the 12-bit parallel AD sampling chip realizes the acquisition of analog quantity signals, and the acquired value participates in DSP control operation; the voltage-frequency conversion circuit consists of a gating chip and a voltage-frequency conversion chip and realizes the conversion from an analog quantity signal to a digital frequency signal; the DA chip is used for realizing dynamic setting of the threshold value; and the comparison of the real-time value of the analog quantity and the threshold value is realized by a comparator. The concrete implementation is as follows:
and (5) processing an analog quantity signal. The current signal and the voltage signal in the traction system are differentially input into the controller of the invention through the sensor. The sensor outputs signals, and the signals are converted into voltage signals through resistors with different resistance values according to different proportions; one end of the voltage signal is led to the minus end of the operational amplifier through a 3.9K resistor; the other end of the voltage signal is connected to a plus end of the operational amplifier after being subjected to voltage division by the resistors of 3.9K and 20K; and the minus end of the operational amplifier is connected with an output end through the parallel connection of a 20K resistor and a 100pF capacitor, and an analog quantity signal which is processed by proportional operation and low-pass filtering is obtained at the output end. And detecting the three-phase current of the traction motor, taking two-phase current in the traction motor, and adding the two-phase current by using an operational amplifier to obtain a third-phase current value.
And (5) collecting analog quantity signals. And the AD chip which adopts 12-bit 4-path differential synchronous sampling is adopted to sample the processed analog quantity signal according to the sampling frequency of 50K, and the processed analog quantity signal is interacted with the DSP chip data through a parallel data bus.
And comparing analog quantity signal thresholds. The absolute value of the threshold is set by adopting a DA chip in an 8-path parallel control mode, and the FPGA chip controls the DA chip in real time according to the algorithm requirement. The absolute value of the threshold value is connected to the minus end of the operational amplifier through a resistor of 20K; meanwhile, the minus end of the operational amplifier is connected with the output end of the operational amplifier through a 20K resistor; the + end of the operational amplifier is connected with the ground; in this way, at the output of the operational amplifier, a negative threshold is obtained. The negative threshold is connected to the minus end of the comparator 1, and the absolute value of the threshold is connected to the plus end of the comparator 2; the analog quantity signal to be compared is connected with the plus terminal of the comparator 1 and the minus terminal of the comparator 2; the output ends of the comparators 1 and 2 are connected and are connected to an FPGA chip; when the analog quantity signal is within the threshold range, the comparator outputs high level, and if the analog quantity signal exceeds the threshold range, the comparator outputs low level.
The digital quantity signal input and output circuit is connected with the FPGA chip and consists of a comparator and a driving circuit, so that the output control of the energy relay of the traction system is realized; the input circuit is composed of a voltage division circuit and a buffer, and the state feedback function of the relay is achieved. Control relay and circuit breaker in the traction system, simultaneously, the operating condition of detection relay and circuit breaker, its concrete realization is as follows:
and outputting the digital quantity signal. The FPGA outputs a digital quantity control signal to the minus end of the comparator, the plus end of the comparator is connected with +2.5V reference voltage, the output end of the comparator drives the G end of the N-channel MOS tube through the push-pull amplifying circuit, the S end of the MOS tube is grounded, and the D end of the MOS tube is output to a controlled object in the traction system. When the FPGA outputs a high level, the controlled relay is closed; and when the FPGA outputs a low level, the controlled relay is disconnected.
And inputting a digital quantity signal. And the state feedback line of the controlled object enters the FPGA chip through the reverser after being subjected to voltage division by the 2.7K resistor and the 680 ohm resistor. In order to prevent the overvoltage of the state signal line from affecting the inverter chip, a voltage stabilizing diode of 10V is connected in parallel to the 680 ohm resistor.
The 8-path IGBT control circuit comprises a buffer, a driving circuit and an optical fiber transmitter. The output of the IGBT control circuit is realized as follows:
first, the FPGA control signal output gates the digital buffer. And then, after the FPGA drives the IGBT signal to pass through the buffer, the voltage is divided by 560 ohms and 2.2K resistors to drive the G end of the N-channel MOS tube, the S end of the MOS tube is grounded, and the D end of the MOS tube is output and connected with the control end of the optical fiber transmitter. When the IGBT control signal is at a high level, the optical fiber transmitter triggers and transmits the signal; when the IGBT control signal is at a low level, the optical fiber transmitter is turned off. The power protection signal passes through the triode, is connected with the G end of MOS pipe, and when the protection signal was effective, the triode switched on, draws down the G end of MOS pipe simultaneously, plays the effect of blockading optic fibre and sending.
The traction motor rotating speed detection circuit comprises a sensor power output and a pulse detection circuit.
As shown in fig. 2, an embodiment of the method of the present invention is as follows:
and logging in a controller control page at the remote end by an IE browser and by utilizing an Internet network communication mode.
The method comprises the following steps: the controller of the invention carries out state self-checking, and mainly comprises: the traction system 110V controls power supply detection, controller internal power supply detection, FPGA reset state detection and DSP reset state detection. Displaying the detection result on a controller state page;
step two: and (5) testing the function of the line contactor. And after the test of the previous step is finished, unlocking the step. The function test is clicked on a test page, and the controller controls the circuit contactor to suck through the digital quantity signal output end; and the suction state of the circuit contactor is read through a digital quantity signal input end. Displaying the test process and the test state in real time on a test page; the test interface requires a processor module at the ARMCortex-A8 kernel at the remote end through a WEB server logging into the system controller.
Step three: and (5) testing the function of the pre-charging contactor. The function test is clicked on a test page, and the controller controls the pre-charging contactor to suck through the digital quantity signal output end; reading the attraction state of the pre-charging contactor through a digital quantity signal input end; reading 1500V main line voltage through an analog quantity signal input end; and when the pre-charging capacitor is completed, the pre-charging contactor is disconnected. And displaying the test process and the test state in real time on a test page. And testing the interface, wherein the interface needs to be tested at a far end through a WEB server logged in a system controller, and the WEB server is a processor module in an ARMCortex-A8 kernel.
Step three: and (5) testing the function of the line contactor. And after the test of the previous step is finished, unlocking the step. The function test is clicked on a test page, and the controller controls the circuit contactor to suck through the digital quantity signal output end; and the suction state of the circuit contactor is read through a digital quantity signal input end. Displaying the test process and the test state in real time on a test page;
step four: and (5) testing the function of a discharge loop of the traction system. After the first two tests are completed, this step is unlocked. When the function test is clicked on a test page, the controller controls the output circuit through the IGBT and triggers the 2 paths of IGBTs of the discharge circuit to be conducted. Meanwhile, the current of the main line is detected through an analog quantity signal input end, so that the function and the performance of the discharge loop are analyzed and judged; displaying the test process and the test state in real time on a test page;
step five: and testing the function of the fan relay. The functional test is clicked on a test page, and the controller controls the fan relay to be attracted through the digital quantity signal output end; and reading the suction state of the fan relay through a digital quantity signal input end. Displaying the test process and the test state in real time on a test page;
step six: and (5) testing the function and performance of a control loop of the three-phase motor. After the above test is completed, this step is unlocked. The controller dynamically controls the load motor of the traction system, and judges the function and performance of the motor control loop by monitoring the three-phase current, the motor speed and the main line power supply current in real time. Displaying the test process and the test state in real time on a test page;
step seven: and generating a test report according to the test process and the test result.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (9)
1. The utility model provides an electric train vehicle traction system off-line test system, its characterized in that, includes controller, power management module, FPGA module, DSP chip, processor module, analog quantity acquisition and processing circuit, digital IO circuit, IGBT drive circuit, motor speed detection circuit, wherein:
the processor module is interacted with the DSP chip and the FPGA module through the SPI respectively and is used for data interaction;
the DSP chip is used for realizing control algorithm operation and interacting with the FPGA module data;
the analog quantity acquisition processing circuit acquires analog quantity data and sends the analog quantity data to the DSP chip and the FPGA module;
the FPGA module is respectively in communication connection with the digital IO circuit, the IGBT driving circuit and the motor rotating speed detection circuit;
the power supply management module is used for providing electric energy;
the controller realizes the control of the off-line test system.
2. The electric train vehicle traction system offline test system of claim 1, wherein the processor module comprises an ARMCortex-A8 chip.
3. The system of claim 1, wherein the power management module comprises ± 24V, ± 15V, 5V, 3.3V power supplies required by internal circuitry of the controller, ± 2.5V, ± 5V, +10V power supplies required by the system, power monitoring circuitry, controller activation circuitry, and protection circuitry.
4. The electric train vehicle traction system offline test system of claim 1, wherein the FPGA module comprises an FPGA chip, an EPCS serial FLASH chip, and an SRAM chip, wherein:
the FPGA chip comprises an NIOS-II soft core processor, a phase-locked loop frequency multiplier, an SDRAM read-write controller, an EPCS serial FLASH chip control interface, a digital logic control interface and an SPI interface;
the SDRAM chip is used as the memory of the FPGA embedded processor;
the EPCS serial FLASH chip is used as a program memory of the FPGA embedded processor and an EPCS controller for guiding program downloading and loading.
5. The off-line testing system for the traction system of the electric train as claimed in claim 1, wherein the analog acquisition processing circuit comprises an analog signal processing circuit, an AD sampling chip, a voltage-to-frequency conversion circuit, a DA chip and a comparison circuit, wherein:
the analog quantity signal processing circuit is realized by an operational amplifier;
the AD sampling chip realizes the acquisition of analog quantity signals, and the acquired value participates in the control operation of the DSP chip;
the voltage-frequency conversion circuit realizes the conversion from an analog quantity signal to a digital frequency signal;
the DA chip realizes the dynamic setting of the threshold value;
the comparison circuit realizes comparison of the real-time value of the analog quantity and the threshold value.
6. The electric train vehicle traction system offline test system of claim 1, wherein the digital IO circuit comprises an input circuit and an output circuit, wherein:
the output circuit consists of a comparator and a driving circuit, and realizes the output control of the energy relay of the traction system;
the input circuit is composed of a voltage division circuit and a buffer, and the state feedback function of the relay is achieved.
7. The electric train vehicle traction system offline test system of claim 1, wherein the IGBT drive circuit comprises a buffer, a drive circuit, and a fiber optic transmitter, wherein: the buffer is connected to the input end of the driving circuit, and the output end of the driving circuit is electrically connected with the optical fiber transmitter.
8. The electric train vehicle traction system offline test system of claim 1, wherein the motor speed detection circuit comprises a sensor power output and a pulse detection circuit.
9. An off-line testing method for a traction system of an electric train vehicle is characterized by comprising the following steps:
a login step: logging in a controller control page;
and (3) state self-checking: detecting a 110V control power supply of the traction system, an internal power supply of a controller, an FPGA reset state and a DSP reset state;
a pre-charging contactor function testing step: controlling the pre-charging contactor to suck through a digital quantity signal output end; reading the attraction state of the pre-charging contactor through a digital quantity signal input end; reading 1500V main line voltage through an analog quantity signal input end; after the pre-charging capacitor is completed, disconnecting the pre-charging contactor;
and (3) a line contactor function test step: controlling the circuit contactor to suck through a digital quantity signal output end; reading the pull-in state of the line contactor through a digital quantity signal input end;
the method comprises the following steps of (1) testing the function of a discharge loop of the traction system: the output circuit is controlled through the IGBT, 2 paths of IGBTs of the discharge circuit are triggered to be conducted, and meanwhile, the current of the main line circuit is detected through the analog quantity signal input end, so that the function and the performance of the discharge circuit are analyzed and judged;
the method comprises the following steps of (1) testing the function of the high-speed circuit breaker: the high-speed circuit breaker is controlled to be closed through a digital quantity signal output end; reading the suction state of the high-speed circuit breaker through a digital quantity signal input end;
the method comprises the following steps of: the fan relay is controlled to be closed through the digital quantity signal output end; reading the suction state of a fan relay through a digital quantity signal input end;
the method comprises the following steps of: dynamically controlling a load motor of the traction system, and realizing the judgment of the function and the performance of a motor control loop by monitoring three-phase current, the motor speed and the main line power supply current in real time;
a report generation step: and generating a test report according to the test process and the test result.
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