CN113466577A - Universal test equipment for current transformer - Google Patents
Universal test equipment for current transformer Download PDFInfo
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- CN113466577A CN113466577A CN202110568164.4A CN202110568164A CN113466577A CN 113466577 A CN113466577 A CN 113466577A CN 202110568164 A CN202110568164 A CN 202110568164A CN 113466577 A CN113466577 A CN 113466577A
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- 238000012360 testing method Methods 0.000 title claims abstract description 148
- 238000004088 simulation Methods 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims description 14
- 238000005192 partition Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000012812 general test Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
Abstract
The invention provides a universal test device for a converter, which comprises a direct current analog power supply, a control power supply, a load, a main control device and a signal analog module, wherein the test device supplies power to a direct current bus of a tested device through the direct current analog power supply, supplies power to a controller of the tested device through the control power supply, issues a control command to the controller of the tested device through the main control device, reads the state feedback of the controller of the tested device, and consumes the output energy of the tested device through the load; the signal simulation module is used for generating state signals respectively corresponding to different tested devices and outputting the generated state signals to the controller of the corresponding tested device, and the state signals are used for simulating the state of a control object of the tested device. The invention can be used for testing different types of converters.
Description
Technical Field
The embodiment of the invention relates to the field of complete machine testing of converters, in particular to universal testing equipment for a converter.
Background
A converter is an electrical device that changes the voltage, frequency, number of phases, and other electrical quantities or characteristics of a power supply system. The subway traction system equipment mainly comprises a traction converter, an auxiliary converter, a motor and the like, and in order to ensure the performance and reliability of a converter product, the converter needs to be tested on a special testing device according to relevant standards before leaving a factory.
Aiming at a traction converter and an auxiliary converter of an urban rail, the conventional test is to respectively build two independent test platforms to respectively test the traction converter and the auxiliary converter, the whole set of test device mainly comprises a power supply cabinet, a load cabinet, a control cabinet and the like, and the power supply voltage is DC 0-2000V.
In addition, the test platform is only suitable for the pre-factory detection of the traction converter and the auxiliary converter, and cannot meet the requirements of a customer on daily maintenance in the use process, auxiliary fault diagnosis when equipment is abnormal, functional test after the overhaul or overhaul and the like. For example, the existing experimental platform cannot test the leading converter and the auxiliary converter independently when the leading converter and the auxiliary converter are not taken off, and the leading converter and the auxiliary converter need to be returned to a factory after overhaul to be tested again.
In addition, the existing test platform has the defects of large number of cabinet bodies, large volume and weight and incapability of moving, so that the existing test platform can only be fixed in indoor places for use, and the cost is very high.
Disclosure of Invention
The embodiment of the invention provides universal testing equipment for the current transformer, aiming at the problems that the testing equipment for the current transformer can only test one type of current transformer, and the current transformer has a large number of cabinets and is large in size and weight.
The invention provides a universal test device for a converter, which comprises a direct current analog power supply, a control power supply, a load, a main control device and a signal analog module, wherein the test device supplies power to a direct current bus of a tested device through the direct current analog power supply, supplies power to a controller of the tested device through the control power supply, issues a control command to the controller of the tested device through the main control device, reads the state feedback of the controller of the tested device, and consumes the output energy of the tested device through the load; the signal simulation module is used for generating state signals respectively corresponding to different tested devices and outputting the generated state signals to the controller of the corresponding tested device, and the state signals are used for simulating the state of a control object of the tested device.
As a further improvement of the present invention, the signal simulation module includes an analog quantity signal module, and the analog quantity signal module includes a plurality of analog quantity output ends, and each of the analog quantity output ends outputs a state signal corresponding to a type of tested devices;
the test equipment comprises an analog quantity interface, and a plurality of analog quantity output ends of the analog quantity signal module are respectively and electrically connected with a plurality of terminal pins of the analog quantity interface; or, the test equipment comprises a plurality of analog quantity interfaces, and a plurality of analog quantity output ends of the analog quantity signal module are respectively electrically connected with the analog quantity interfaces.
As a further improvement of the present invention, the signal simulation module comprises a digital quantity signal module, and the digital quantity signal module comprises a plurality of digital quantity output terminals, and each of the digital quantity output terminals outputs a status signal corresponding to a type of device under test;
the test equipment comprises a digital quantity interface, and a plurality of digital quantity output ends of the digital quantity signal module are respectively and electrically connected with a plurality of terminal pins of the digital quantity interface; or, the signal input/output interface comprises a plurality of digital quantity interfaces, and a plurality of digital quantity output ends of the digital quantity signal module are respectively electrically connected with the digital quantity interfaces.
As a further improvement of the present invention, the analog signal module includes one or more of the following circuits: the motor speed detection circuit comprises a resistance circuit used for simulating a temperature signal and a rotating speed detection circuit used for simulating a motor speed signal.
As a further improvement of the present invention, the test equipment includes a voltage and current detection device, the digital quantity signal module includes a programmable logic controller, and the programmable logic controller is electrically connected to the main control device, and generates a digital quantity related to a control object of the device under test according to a control signal of the main control device, and reads a value of the voltage and current detection device and feeds back the value to the main control device.
As a further improvement of the present invention, the load includes an ac load, a first dc load, and a second dc load, the load interface includes an ac load interface, a first dc load interface, and a second dc load interface, the ac load is connected to the ac output interface of the device under test through the ac load interface, and the first dc load is connected to the dc bus of the device under test through the first dc load interface and the second dc load interface respectively via the contactor.
As a further improvement of the present invention, ammeters are respectively disposed between the first dc load and the first dc load interface, and between the second dc load and the second dc load interface, and the programmable logic controller is electrically connected to the ammeters.
As a further improvement of the present invention, the dc analog power supply includes a transformer, a rectifier, a bus capacitor, and a voltmeter, an output terminal of the rectifier is electrically connected to the device under test through a positive dc bus and a negative dc bus, the voltmeter and the bus capacitor are respectively connected in series between the positive dc bus and the negative dc bus, and the programmable logic controller is electrically connected to the voltmeter.
As a further improvement of the invention, the universal test equipment for the current transformer comprises a main cabinet body, wherein the main cabinet body comprises a first chamber, a second chamber and a third chamber which are separated by a partition plate, the partition plate between the first chamber and the second chamber is provided with a plurality of first wire passing holes, and the partition plate between the first chamber and the third chamber is provided with a plurality of second wire passing holes;
the first chamber comprises a first opening located on a first side face of the main cabinet body, and the control power supply, the rectifier of the direct current analog power supply and the bus capacitor are respectively installed in the first chamber through the first opening;
the second chamber comprises a second opening positioned on the second side face of the main cabinet body, and the load and the transformer of the direct current analog power supply are respectively installed in the second chamber through the second opening;
the third chamber includes a third opening located at a third side of the main cabinet, the main control device being mounted to the third chamber via the third opening.
As a further improvement of the invention, the current transformer universal test device comprises a display;
the universal testing equipment for the converter comprises an auxiliary cabinet body and an instrument door, wherein the auxiliary cabinet body is positioned on a top plate of the main cabinet body, the auxiliary cabinet body comprises a weak current cavity with a fourth opening, and the signal simulation module is installed in the weak current cavity through the fourth opening; the instrument door is installed at a fourth opening of the auxiliary cabinet body through a fifth rotating shaft, and the display is installed on the instrument door.
According to the universal test equipment for the current transformer, the signal simulation module is used for generating the state signals respectively corresponding to different tested equipment, so that the universal test equipment for the current transformer can be used for testing different types of current transformers. In addition, the modules are integrated into the same cabinet body, so that the mobility of the universal test equipment of the current transformer is realized, and the maintainability is improved.
Drawings
Fig. 1 is a block diagram of a universal test device for a current transformer according to an embodiment of the present invention;
FIG. 2 is a circuit topology diagram of a universal test device for a current transformer according to an embodiment of the present invention;
fig. 3 is a schematic overall structure diagram of a universal test device for a current transformer according to an embodiment of the present invention;
fig. 4 is another schematic overall structure diagram of the universal test equipment for the current transformer according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the current transformer universal test device 10 provided in the embodiment of the present invention is a block diagram, and can be used for testing tested devices 20 such as a traction current transformer and an auxiliary current transformer, and mainly realizes two functions of test operation and monitoring display, and can display an operating state and a test result in a test process.
The universal test equipment 10 for the converter comprises a direct-current simulation power supply 11, a signal simulation module 12, a main control device 13, a control power supply 14 and a load 16, wherein the direct-current simulation power supply 11, the signal simulation module 12, the main control device 13, the control power supply 14 and the load 16 are integrated into the same cabinet body, so that the defects that the existing converter test platform cabinet bodies are large in quantity, large in size and weight and incapable of moving can be overcome. Of course, in practical applications, the dc analog power source 11, the signal analog module 12, the main control device 13, the control power source 14, and the load 16 may be integrated into different cabinets, but the mobility thereof will be greatly influenced.
The test equipment supplies power to a direct current bus of the tested equipment through the direct current analog power supply 11, supplies power to a controller of the tested equipment through the control power supply 14, issues a control command to the controller of the tested equipment through the main control device 13, reads state feedback of the controller of the tested equipment, and consumes output energy of the tested equipment through a load.
Specifically, the test device may be provided with a first power supply interface, a second power supply interface, a load interface, a main control interface, and a signal input/output interface, and the dc analog power source 11 supplies power to the dc bus of the device under test 20 through the first power supply interface, that is, the main power supply interface (the main power supply interface is electrically connected to the dc bus) of the device under test may be connected to the first power supply interface, and obtain the operating voltage of the main power module from the first power supply interface. In a specific implementation, as shown in fig. 2, the dc analog power source 11 may be supplied by 380V three-phase ac power, and the dc analog power source 11 includes a breaker QF1, a contactor KM1, a transformer T1, a rectifier D1, a snubber circuit (including contactors KM2, KM3 and a resistor R1), a bus capacitor C1, and the like. The dc analog power supply 11 can convert 380V three-phase ac power inputted from outside into an operating voltage (e.g., 110V high-power dc voltage) of the device under test, and output the operating voltage to the dc bus of the device under test 20.
The signal simulation module 12 is used for simulating various I/O signals (including various temperature detections and motor speed detections) of a controlled device (for example, a vehicle) outside the device under test 20, and channels thereof can be flexibly configured according to different requirements, and reserved channels are reserved to meet the requirement of expandability, so as to meet the test function under different working conditions. Specifically, the signal simulation module 12 may generate status signals corresponding to different devices under test, respectively, and each set of status signals is used to simulate the status of a control object (e.g., a vehicle) of one type of device under test 20 (e.g., a traction converter, an auxiliary converter). The signal simulation module 12 is electrically connected to the signal input/output interface, and the signal input/output interface outputs only the status signal corresponding to a certain type of device under test 20 at the same time. For example, when a traction converter needs to be tested, the signal simulation module 12 generates only a status signal simulating the status of the traction motor; when the auxiliary converter needs to be tested, the signal simulation module 12 generates only a status signal simulating the status of the load (e.g., battery charger, air conditioner, air compressor, etc.) of the auxiliary converter.
Specifically, the signal simulation module 12 includes a section for simulating analog signals such as a heat sink temperature, a motor temperature, a load temperature, a battery temperature, and the like, and a section for simulating digital signals such as a motor speed, a load voltage, a load current, and the like. The current transformer universal test device 10 is enabled to test different current transformers through the signal simulation module 12, for example, when used for testing a traction current transformer, the signal simulation module 12 can generate corresponding analog signals (such as a radiator, a traction motor temperature, a storage battery temperature, etc.) and digital signals (such as a rotation speed of the traction motor, etc.) when the traction motor is operated.
The control power supply 14 supplies power to the controller 21 of the device under test 20 through the second power supply interface, that is, the auxiliary power supply interface (the auxiliary power supply interface is electrically connected to the power supply terminal pin of the controller) of the device under test 20 can be connected to the second power supply interface, and obtains the operating voltage of the controller 21 from the second power supply interface.
In a specific implementation, as shown in fig. 2, the control power source 14 may be powered by 220V single-phase ac, and the control power source 14 may specifically include a breaker QF2, a contactor KM9, a controller power source 141, a first power source 142, a second power source 143, a contactor coil 15 (the power supply of the converter universal test apparatus 10 may be manually cut off in an abnormal state through the normally closed button contactor coil 15), and the like, where the breaker QF2, the contactor KM9, the controller power source 141, the first power source 142, and the second power source 143 are respectively connected to externally input 220V ac, the contactor coil 15 is connected to the 220V ac through the normally closed button S1, and the part for analog digital signals in the signal simulation module 12 of the universal converter test apparatus 10, the main control device 13, and the like are also connected to the externally input 220V ac. Wherein the controller power supply 141 can convert the externally input 220V single-phase ac power into the operating voltage (e.g., 110V low-power dc voltage) of the controller of the device under test 20, and output the operating voltage to the controller 21 of the device under test 20. The first power supply 142 can convert 220V single-phase alternating current into 24V direct current and supply power to the cabinet fan of the universal test equipment 10 for the converter; the second power source 143 can convert 220V single-phase ac power into 15V/5V dc power, and supply power to the portion of the signal simulation module 12 of the converter universal test apparatus 10 for simulating signals such as temperature signals and motor speed signals.
The load 16 is connected with the output end of the device under test 20 through a load interface, the output end of the device under test 20 can be connected to the load interface and output, for example, when the device under test 20 is a traction converter, the voltage output end of the traction converter is connected to the load interface and outputs a driving voltage to the load interface, the load 16 simulates the consumption of the driving voltage and related electric energy of the traction motor, and the signal simulation module 12 generates a state signal simulating the state of the traction motor; when the device under test 20 is an auxiliary converter, the voltage output terminal of the auxiliary converter is connected to the load interface and outputs a supply voltage to the load interface, and the load 16 simulates the power consumption of loads such as a battery charger, an air conditioner, an air compressor, and the like.
The main control device 13 may specifically adopt an industrial personal computer, and is electrically connected to the controller 21 of the device under test 20 through a main control interface. Specifically, as shown in fig. 2, the main control device 13 may communicate with the controller 21 of the device under test 20 through an RS232 communication bus or an ethernet communication line.
The main control device 13 is a main controller of the current transformer universal test equipment 10, and can implement one or more of the following functions: issuing control instructions to the signal simulation module 12 and the controller 21 of the device under test 20, reading state feedback of the signal simulation module 12 and the controller 21 of the device under test 20, running test software, storing test data, automatically generating test reports, and the like.
The test mode may be selected by the master control device 13, for example, when the traction converter test mode is selected, the master control device 13 may perform one or more of the following tests on the device under test: a box body control unit (TCU) test, a box body fan test, an IGBT drive test, a low-voltage brake chopping test, a low-voltage inverter load test and the like; when the auxiliary converter test mode is selected, the main control device 13 may perform one or more of the following tests on the device under test: the method comprises the following steps of box body control unit (Moris) testing, IGBT driving testing, box body cooling fan testing in a low-voltage mode, inversion unit loading testing in the low-voltage mode, charger loading testing in the low-voltage mode and the like.
The universal test equipment 10 for the current transformer outputs the state signals generated by the signal simulation module 12 through the signal input/output interface, and the state signals generated by the signal simulation module 12 correspond to the control objects of the current transformers of different types respectively, so that the universal test equipment can test the current transformers of different types. In addition, the modules are integrated into the same cabinet body, so that the mobility of the universal test equipment of the current transformer is realized, and the maintainability is improved.
In an embodiment of the present invention, the signal simulation module 12 may include an analog signal module 121, and the analog signal module 121 may generate analog signals of all the controlled objects of the testable current transformer. Specifically, the analog signal module 121 may include one or more of the following circuits: a resistance circuit for simulating a temperature signal, a rotation speed detection circuit (e.g., a rotation speed detection board) for simulating a motor speed signal, and the like.
Accordingly, the analog signal module 121 includes a plurality of analog output terminals, and outputs different analog quantities through the analog output terminals. The signal input/output interface includes an analog quantity interface, and a plurality of analog quantity output ends of the analog quantity signal module 121 are electrically connected to a plurality of terminal pins of the analog quantity interface, respectively; alternatively, the signal input/output interface includes a plurality of analog quantity interfaces, and a plurality of analog quantity output ends of the analog quantity signal module 121 are electrically connected to the plurality of analog quantity interfaces respectively. When the device under test 20 is tested, the device under test 20 may be connected to the analog interface through an analog I/O line, so that the controller 21 of the device under test 20 may obtain each analog and control each module therein.
In an embodiment of the present invention, the signal simulation module 12 includes a digital quantity signal module 122, and the signal simulation module 12 is a slave controller of the current transformer universal test apparatus 10 and can implement the following functions: and receiving a control command of an industrial personal computer, inputting and outputting digital quantity of a controller 21 of the tested device 20, and controlling various contactors, indicator lamps and the like in the universal testing device 10 of the converter.
The digital quantity signal module 122 may specifically include a PLC (Programmable Logic Controller), and the Programmable Logic Controller is electrically connected to the main control device 13, and generates a digital quantity related to a control object of the device under test according to a control signal of the main control device.
The digital signal module 122 includes a plurality of digital output terminals; correspondingly, the signal input/output interface includes a digital interface, and a plurality of digital output terminals of the digital signal module 122 are electrically connected to a plurality of terminal pins of the digital interface, respectively; alternatively, the signal input/output interface includes a plurality of digital quantity interfaces, and the digital quantity output ends of the digital quantity signal module 122 are electrically connected to the digital quantity interfaces respectively. When the device under test 20 is tested, the device under test 20 may be connected to the analog interface through a digital I/O line, so that the controller 21 of the device under test 20 may obtain various digital values and control various modules therein.
In an embodiment of the present invention, as shown in fig. 2, the load 16 includes an ac load, a first dc load, and a second dc load, and accordingly, the load interfaces include an ac load interface, a first dc load interface, and a second dc load interface, and the ac load is connected to the ac output interface of the device under test 20 through the ac load interface, and the first dc load is connected to the dc bus (through the contactor) of the device under test through the first dc load interface and the second dc load interface, respectively.
The ac load may specifically include a three-phase reactor L1, the first dc load and the second dc load include resistive loads R3 and R4, respectively, and the three-phase reactor L1 and the two resistive loads R3 and R4 are connected to corresponding load interfaces via contactors KM5, KM7 and KM8, respectively. The three-phase reactor L1 can simulate a three-phase winding of a motor, the resistance loads R3 and R4 can be used as braking resistors, and feedback voltage generated by the traction motor on a direct current bus of the traction converter can be quickly released.
As a further improvement of the present invention, referring to fig. 2, ammeters a are respectively disposed between the first dc load and the first dc load interface, and between the second dc load and the second dc load interface, and the programmable logic controller is electrically connected to the two ammeters a respectively. In addition, a voltmeter V is also connected in series between the positive dc bus and the negative dc bus of the dc analog power supply 11, and the programmable logic controller is electrically connected to the voltmeter V. In this way, the programmable logic controller can read the values of ammeter A and voltmeter V and act as part of the test flow reference or test results.
In addition, the universal test equipment 10 for a converter may further include a plurality of indicator lights, such as a power indicator light, an operation indicator light, a discharge indicator light, a fault indicator light, and the like, which may be respectively electrically connected to the programmable logic controller, so that the programmable logic controller may control each indicator light to be turned on or off according to a test state, and an operator may know the test state in real time according to a state of each indicator light.
In one embodiment of the present invention, as shown in fig. 3 to 4, the current transformer general test apparatus 10 is integrated into a cabinet, and the current transformer general test apparatus includes a main cabinet 31, the main cabinet 31 includes a first chamber 311, a second chamber 312 and a third chamber 313 separated by a partition, the partition between the first chamber 311 and the second chamber 312 has a plurality of first wire passing holes, and the partition between the first chamber 311 and the third chamber 313 has a plurality of second wire passing holes 3131.
The first chamber 311 includes a first opening at a first side of the main cabinet 31, and the control power supply 14, the rectifier of the dc analog power supply 11, the bus capacitor, and the like are mounted to the first chamber 311 through the first opening, respectively. The second chamber 312 includes a second opening located at the second side of the main cabinet 31, the load 16 and the transformer of the dc analog power source 11 are respectively mounted in the second chamber 312 through the second opening, and the electrical components in the first chamber 311 and the second chamber 312 are electrically connected through the first wire passing hole. The third compartment 313 includes a third opening at a third side of the main cabinet 31, and the main control device 13 is mounted to the third compartment 313 via the third opening. The main control device 13 is electrically connected to the electrical components (e.g., the control power supply 14) in the first cavity 311 and the connection terminal outside the first cavity 311 through the cable passing through the second wire passing hole 3131, so as to send control commands to the main control device and obtain feedback signals, thereby implementing the converter test control.
The main cabinet 31 may be formed by a frame and a sheet metal part fixed to the frame. For moving, the bottom of the main cabinet 31 may have a plurality of rollers 33, and at least some of the rollers 33 have a braking device to fix the main cabinet 31.
The safety and maintainability of the universal test equipment for the current transformer are greatly improved by arranging a plurality of independent chambers, such as the first chamber 311, the second chamber 312 and the third chamber 313, in the main cabinet body 31 and respectively installing electronic modules with different types in the chambers.
In an embodiment of the present invention, a high voltage terminal box 315 and a low voltage terminal box 314 are further disposed on the main cabinet 31 of the universal converter testing apparatus, and the high voltage terminal box 315 and the low voltage terminal box 314 are respectively located on a fourth side of the main cabinet 31.
The strong current junction box 315 includes a fourth opening located on the fourth side of the main cabinet 31, and a plurality of strong current connection terminals electrically connected to the load 16 in the second chamber 312, the transformer of the dc analog power supply, and the like are disposed in the strong current junction box 315, so that a strong current connection operation can be performed through the fourth opening; the weak current junction box 314 includes a fifth opening located on the fourth side of the main cabinet 31, and a weak current connection terminal electrically connected to the signal simulation module in the first chamber 311 and the main control device 13 in the third chamber 313 is disposed in the weak current junction box 314.
In addition, for monitoring the testing process and displaying the testing result, the current transformer universal testing device 10 further includes a display 37. Accordingly, the current transformer universal test apparatus 10 includes the sub-cabinet 32 and the meter door 321. The auxiliary cabinet body 32 is positioned on the top plate of the main cabinet body 31, the auxiliary cabinet body 32 comprises a weak current cavity with a weak current cavity opening, and the signal simulation module 12 is installed in the weak current cavity through the weak current cavity opening; an instrument door 321 is mounted to the weak current chamber opening of the sub-cabinet 32, and a display 37 is mounted on the instrument door 321. The meter door can be also provided with current and voltage testing devices such as an ammeter and a voltmeter, so that an operator can timely know the detection state.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The universal test equipment for the converter is characterized by comprising a direct current analog power supply, a control power supply, a load, a main control device and a signal analog module, wherein the test equipment supplies power to a direct current bus of tested equipment through the direct current analog power supply, supplies power to a controller of the tested equipment through the control power supply, issues a control command to the controller of the tested equipment through the main control device, reads state feedback of the controller of the tested equipment, and consumes output energy of the tested equipment through the load; the signal simulation module is used for generating state signals respectively corresponding to different tested devices and outputting the generated state signals to the controller of the corresponding tested device, and the state signals are used for simulating the state of a control object of the tested device.
2. The current transformer universal test device as recited in claim 1, wherein said signal simulation module comprises an analog signal module, and said analog signal module comprises a plurality of analog outputs, and each of said analog outputs a status signal corresponding to a class of devices under test;
the test equipment comprises an analog quantity interface, and a plurality of analog quantity output ends of the analog quantity signal module are respectively and electrically connected with a plurality of terminal pins of the analog quantity interface; or, the test equipment comprises a plurality of analog quantity interfaces, and a plurality of analog quantity output ends of the analog quantity signal module are respectively electrically connected with the analog quantity interfaces.
3. The current transformer universal test equipment as claimed in claim 1 or 2, wherein the signal simulation module comprises a digital quantity signal module, and the digital quantity signal module comprises a plurality of digital quantity output terminals, and each digital quantity output terminal outputs a status signal corresponding to a class of tested equipment;
the test equipment comprises a digital quantity interface, and a plurality of digital quantity output ends of the digital quantity signal module are respectively and electrically connected with a plurality of terminal pins of the digital quantity interface; or, the signal input/output interface comprises a plurality of digital quantity interfaces, and a plurality of digital quantity output ends of the digital quantity signal module are respectively electrically connected with the digital quantity interfaces.
4. The current transformer universal test device of claim 2, wherein the analog signal module comprises one or more of the following: the motor speed detection circuit comprises a resistance circuit used for simulating a temperature signal and a rotating speed detection circuit used for simulating a motor speed signal.
5. The current transformer universal test device according to claim 3, wherein the test device comprises a voltage and current detection device, the digital quantity signal module comprises a programmable logic controller, and the programmable logic controller is electrically connected to the main control device, and generates a digital quantity related to a control object of the device under test according to a control signal of the main control device, and reads a value of the voltage and current detection device and feeds back the value to the main control device.
6. The converter universal test device according to claim 5, wherein the load comprises an ac load, a first dc load, and a second dc load, the load interface comprises an ac load interface, a first dc load interface, and a second dc load interface, the ac load is connected to the ac output interface of the device under test through the ac load interface, and the first dc load is connected to the dc bus of the device under test through the first dc load interface and the second dc load interface, respectively.
7. The current transformer universal test device as claimed in claim 6, wherein an ammeter is respectively disposed between the first dc load and the first dc load interface, and between the second dc load and the second dc load interface, and the programmable logic controller is electrically connected to the ammeter.
8. The universal test equipment for the current transformer as claimed in claim 5, wherein the DC analog power source comprises a transformer, a rectifier, a bus capacitor and a voltmeter, the output end of the rectifier is electrically connected with the tested equipment through a positive DC bus and a negative DC bus, the voltmeter and the bus capacitor are respectively connected in series between the positive DC bus and the negative DC bus, and the programmable logic controller is electrically connected with the voltmeter.
9. The universal test equipment for the current transformer of claim 8, wherein the universal test equipment for the current transformer comprises a main cabinet body, the main cabinet body comprises a first chamber, a second chamber and a third chamber which are separated by a partition plate, a plurality of first wire through holes are formed in the partition plate between the first chamber and the second chamber, and a plurality of second wire through holes are formed in the partition plate between the first chamber and the third chamber;
the first chamber comprises a first opening located on a first side face of the main cabinet body, and the control power supply, the rectifier of the direct current analog power supply and the bus capacitor are respectively installed in the first chamber through the first opening;
the second chamber comprises a second opening positioned on the second side face of the main cabinet body, and the load and the transformer of the direct current analog power supply are respectively installed in the second chamber through the second opening;
the third chamber includes a third opening located at a third side of the main cabinet, the main control device being mounted to the third chamber via the third opening.
10. The current transformer universal test device of claim 9, wherein the current transformer universal test device comprises a display;
the universal testing equipment for the converter comprises an auxiliary cabinet body and an instrument door, wherein the auxiliary cabinet body is positioned on a top plate of the main cabinet body, the auxiliary cabinet body comprises a weak current cavity with a fourth opening, and the signal simulation module is installed in the weak current cavity through the fourth opening; the instrument door is installed at a fourth opening of the auxiliary cabinet body through a fifth rotating shaft, and the display is installed on the instrument door.
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| CN202110568164.4A CN113466577A (en) | 2021-05-24 | 2021-05-24 | Universal test equipment for current transformer |
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| CN202110568164.4A CN113466577A (en) | 2021-05-24 | 2021-05-24 | Universal test equipment for current transformer |
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