CN116203452A - AC/DC power module test system - Google Patents
AC/DC power module test system Download PDFInfo
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- CN116203452A CN116203452A CN202310490882.3A CN202310490882A CN116203452A CN 116203452 A CN116203452 A CN 116203452A CN 202310490882 A CN202310490882 A CN 202310490882A CN 116203452 A CN116203452 A CN 116203452A
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- 238000012360 testing method Methods 0.000 title claims abstract description 89
- 238000009413 insulation Methods 0.000 claims abstract description 58
- 239000011159 matrix material Substances 0.000 claims abstract description 32
- 230000003750 conditioning effect Effects 0.000 claims abstract description 14
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 3
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- 238000000034 method Methods 0.000 abstract description 7
- 239000003990 capacitor Substances 0.000 description 35
- 230000005669 field effect Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 10
- 230000001629 suppression Effects 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 238000003491 array Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 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
- G01R31/40—Testing power supplies
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Abstract
The invention belongs to the technical field of electric variable testing, and discloses an AC/DC power module testing system; the ripple signal connecting module transmits the ripple signal output by the power module to be measured to the digital oscilloscope module for measurement; the signal conditioning module acquires an output signal of the power module to be tested under a load, and the voltage and current acquisition module in the industrial personal computer acquires the output voltage and the output current of the power module to be tested; the industrial personal computer sends an insulation resistance test instruction to the relay driving module, and the relay driving module analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving module controls the switch matrix switching module to act according to the matrix switching signal, and the insulation resistance tester tests the insulation resistance of the power module to be tested. The power supply testing system integrates the instrument required by the power supply testing to be tested into a testing system, reduces the cable connection between the power supply module to be tested and the equipment, does not need human interference in the testing process, improves the testing efficiency and reduces the testing error.
Description
Technical Field
The invention belongs to the technical field of electric variable testing, and relates to an AC/DC power module testing system.
Background
The power module is used as one of important components of the airborne and carrier-based products, and provides stable and reliable working voltage and current for airborne equipment, and the performance of the power module directly influences the performance of other airborne and carrier-based products. Therefore, whether the power module can provide stable and reliable working voltage and current for other airborne products is one of important criteria for judging the quality of the power supply.
At present, when an AC/DC power supply module is detected, the detection is carried out through a plurality of independent instruments, only one-way test can be carried out on the power supply module at each time, and the cable connection is complex; and the output data of the power supply module is required to be recorded and manually input into a calculation formula, the power supply index parameter is calculated, the test efficiency is low, and if the test is repeated, the consistency of the test data is poor.
Disclosure of Invention
The invention solves the technical problem of providing an AC/DC power module test system, which integrates an instrument required by a power test to be tested into a test system, reduces cable connection between the power module to be tested and equipment, does not need human interference in the test process, improves the test efficiency and reduces the test error.
The invention is realized by the following technical scheme:
an AC/DC power module test system comprises an instruction receiving and transmitting module, a power switching module and a multichannel load switching module, wherein the power switching module and the multichannel load switching module are connected with the instruction receiving and transmitting module;
the industrial personal computer sends a load configuration instruction and a power supply switching instruction to the instruction receiving and sending module;
the instruction transceiver module controls the power switching module to switch the direct current power supply module or the alternating current power supply module to supply power to the power module to be tested according to the power switching instruction; the instruction receiving and transmitting module controls the multichannel load switching module to connect a plurality of loads simulated by the electronic load instrument with the power module to be tested one by one or simultaneously according to the load configuration instruction;
each channel of the multichannel load switching module is provided with a ripple signal connection module and a signal conditioning module; the ripple signal connection module detects the ripple signal output by the power module to be detected and sends the ripple signal to the digital oscilloscope module, the digital oscilloscope module measures the ripple signal to obtain power supply ripple, and the digital oscilloscope module uploads the power supply ripple to the industrial personal computer and displays the power supply ripple on a display of the industrial personal computer; the signal conditioning module acquires an output signal of the power module to be tested under load, the output signal is amplified and filtered by the signal conditioning module and then is uploaded to the industrial personal computer, and a voltage and current acquisition module in the industrial personal computer acquires the output voltage and the output current of the power module to be tested;
the device also comprises an insulation test module, wherein the insulation test module consists of an industrial personal computer interface, a relay driving module, a switch matrix switching module and an insulation test interface which are connected in sequence; the insulation test module is connected with the power module to be tested through an insulation test interface; the insulation resistance tester is connected to two ends of the switch matrix switching module;
the industrial personal computer sends an insulation resistance test instruction to the relay driving module through an industrial personal computer interface, and the relay driving module analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving module controls the switch matrix switching module to act according to the matrix switching signal, the insulation resistance tester tests the insulation resistance of the power module to be tested, and the insulation resistance tester uploads the measured insulation resistance to the industrial personal computer through the serial port line.
Further, the power supply switching module comprises a direct current output circuit, an alternating current output circuit and an output interlocking circuit for connecting the direct current output circuit and the alternating current output circuit;
the direct current output circuit is connected with the direct current power supply module, and the command transceiver module programs the direct current output circuit according to the power supply switching command so that the direct current power supply module provides direct current power supply for the power supply module to be tested;
the alternating current output circuit is connected with the alternating current power supply module, and the command transceiver module programs the alternating current output circuit according to the power supply switching command, so that the alternating current power supply module provides alternating current power supply for the power supply module to be tested.
Further, the multichannel load switching module is composed of a plurality of double-pole double-throw relays;
the electromagnetic coil of the double-pole double-throw relay is connected with the instruction receiving and transmitting module, two ends of one contactor of the double-pole double-throw relay are respectively connected with the positive end of the electronic load instrument and the power supply access terminal, and the power supply access terminal is connected with the output interface of the power supply module to be tested; two ends of the other contactor of the double-pole double-throw relay are respectively grounded and the negative end of the electronic load instrument.
Further, the ripple signal connection module comprises an SMA connector and ripple signal connection circuits connected in parallel at two ends of the SMA connector; one end of the ripple signal connection circuit is connected with the power supply access terminal, and the other end of the ripple signal connection circuit is grounded; the ripple signal connecting circuit transmits the ripple signal output by the power module to be measured to the digital oscilloscope module for measurement through the SMA connector.
Further, the switch matrix switching module comprises a plurality of groups of relays, and any group of relays consists of a high-end relay and a low-end relay;
the contactor of the high-end relay is connected with the contactor of the low-end relay, an interface terminal is arranged between the contactor of the high-end relay and the contactor of the low-end relay, and the interface terminal is connected with an insulation resistance test interface; the contactor of the high-end relay is connected with the positive end of the insulation tester; the contactor of the low-end relay is connected with the negative end of the insulation tester;
the two ends of the electromagnetic coils of the high-end relay and the low-end relay are respectively connected with the relay driving module and the internal 24V power supply.
Further, the relay driving module comprises a relay driving circuit; the relay driving circuit is connected with the industrial personal computer interface, analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving circuit controls the relay in the switch matrix switching module to act according to the matrix switching signal.
Furthermore, the electronic load instrument, the direct-current power supply module and the alternating-current power supply module are connected into the industrial personal computer through serial port lines to realize communication interaction;
the industrial personal computer sends a load adjustment instruction to the electronic load instrument through the serial port line, and the electronic load instrument adjusts the simulated load according to the load adjustment instruction; the industrial personal computer sends an output adjustment instruction to the direct current power supply module and the alternating current power supply module through the serial port line, and the direct current power supply module and the alternating current power supply module adjust output voltage according to the output adjustment instruction.
Compared with the prior art, the invention has the following beneficial technical effects:
1. the AC/DC power module testing system integrates equipment required by insulation resistance testing, output voltage, output current and power supply ripple testing of a power module to be tested into a testing system, and when the AC/DC power module testing system is used, corresponding instructions are sent to a relay driving module and an instruction receiving and transmitting module through an industrial personal computer, and the relay driving module and the instruction receiving and transmitting module can drive corresponding circuits to perform load simulation, power supply of the power module to be tested and insulation resistance testing; the power supply ripple wave, the output voltage and the output current of the power supply module to be tested are uploaded to the industrial personal computer through corresponding circuits; the equipment required by the test is integrated into the test system, so that the cable connection between the power module to be tested and each equipment is reduced, the artificial interference is not required in the test process, the test efficiency is improved, and the test error is reduced.
2. According to the AC/DC power module testing system provided by the invention, the industrial personal computer controls the power switching module to output a direct-current power supply or an alternating-current power supply to supply power to the power module to be tested through the instruction receiving and transmitting module according to the type of the power module to be tested; the instruction receiving and transmitting module controls the multichannel load switching module to connect a plurality of loads simulated by the electronic load instrument with the power module to be tested one by one or simultaneously according to the load configuration instruction of the industrial personal computer, and simulates the work load of the power module to be tested; meanwhile, output signals and ripple signals of the power supply module to be tested under different loads are collected through the signal conditioning module and the ripple signal connecting module; the output signal and the ripple signal can be processed by the industrial personal computer to obtain the parameter information of the power module to be tested; in the test process, the output signals and the ripple signals are uploaded to the industrial personal computer, the measured parameters are not required to be read manually, the parameters are not required to be considered to be processed, and the accuracy of the measured parameters of the power module to be tested is ensured while the test efficiency is improved; errors in the testing process can be reduced when the test is repeated.
3. According to the AC/DC power module testing system provided by the invention, when the insulation resistance of the power module to be tested is tested, the relay driving module is used for controlling the switch matrix switching module to switch the testing channel, so that the insulation resistance of the power module to be tested can be tested as required; in the testing process, the measured insulation resistance is uploaded to the industrial personal computer, the measured parameters are not required to be read manually, and the testing efficiency is improved and meanwhile errors in the testing process are reduced.
Drawings
FIG. 1 is a schematic block diagram of an AC/DC power module testing system;
FIG. 2 is a schematic circuit diagram of an instruction transceiver module;
FIG. 3 is a schematic circuit diagram of a DC output circuit;
FIG. 4 is a schematic circuit diagram of an AC output circuit;
FIG. 5 is a circuit schematic of the output interlock circuit;
FIG. 6 is a circuit schematic of a load switching module;
FIG. 7 is a schematic circuit diagram of a signal conditioning module;
FIG. 8 is a circuit schematic of a ripple signal connection circuit;
FIG. 9 is a circuit schematic of a first portion of the relay drive circuit;
FIG. 10 is a circuit schematic of a second portion of the relay drive circuit;
FIG. 11 is a schematic circuit diagram of a third portion of the relay drive circuit;
FIG. 12 is a schematic circuit diagram of a switch matrix module;
FIG. 13 is a schematic diagram of an interface circuit of an insulation resistance test interface;
fig. 14 is a circuit schematic diagram of the industrial personal computer interface J1;
fig. 15 is a circuit schematic diagram of the industrial personal computer interface J2.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings, which illustrate but do not limit the invention.
See fig. 1-15; the invention discloses an AC/DC power module testing system, which comprises an instruction receiving and transmitting module, a power switching module and a multichannel load switching module, wherein the power switching module and the multichannel load switching module are connected with the instruction receiving and transmitting module.
And the industrial personal computer sends a load configuration instruction and a power supply switching instruction to the instruction receiving and sending module.
The instruction receiving and transmitting module controls the power switching module to switch the direct current power supply module or the alternating current power supply module to supply power to the power module to be tested according to the power switching instruction.
The instruction receiving and transmitting module controls the multichannel load switching module to connect a plurality of loads simulated by the electronic load instrument with the power module to be tested one by one or simultaneously according to the load configuration instruction; each channel of the multichannel load switching module is provided with a ripple signal connection module and a signal conditioning module; the ripple signal connection module detects the ripple signal output by the power module to be detected and sends the ripple signal to the digital oscilloscope module, the digital oscilloscope module measures the ripple signal to obtain power supply ripple, and the digital oscilloscope module uploads the power supply ripple to the industrial personal computer and displays the power supply ripple on a display of the industrial personal computer; the signal conditioning module acquires an output signal of the power module to be tested under load, the output signal is amplified and filtered by the signal conditioning module and then is uploaded to the industrial personal computer, and the voltage and current acquisition module in the industrial personal computer acquires the output voltage and the output current of the power module to be tested.
Specifically, a control unit is arranged in the industrial personal computer, and the control unit obtains the output power, the voltage precision, the voltage adjustment rate and the current adjustment rate of the power module to be tested through the output voltage and the output current of the power module to be tested.
The test system also comprises an internal 24V power supply, an internal 15V power supply, an internal-15V power supply and an internal 5V power supply for supplying power to each module in the test system.
Specifically, the instruction transceiver module includes line drivers U5, U6 and U7; the model numbers of the line drivers U5, U6 and U7 are SN74HC245PW. The line drivers U5, U6 and U7 are connected with the industrial personal computer through a plurality of input terminals; the line drivers U5, U6 and U7 are connected to the multi-channel load switching module and the power switching module through a plurality of output terminals.
The device also comprises an insulation test module, wherein the insulation test module consists of an industrial personal computer interface, a relay driving module, a switch matrix switching module and an insulation test interface which are connected in sequence; the insulation test module is connected with the power module to be tested through an insulation test interface; the insulation resistance tester is connected to two ends of the switch matrix switching module; the industrial personal computer sends an insulation resistance test instruction to the relay driving module through an industrial personal computer interface, and the relay driving module analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving module controls the switch matrix switching module to act according to the matrix switching signal, the insulation resistance tester tests the insulation resistance of the power module to be tested, and the insulation resistance tester uploads the measured insulation resistance to the industrial personal computer through the serial port line.
The power supply switching module comprises a direct current output circuit, an alternating current output circuit and an output interlocking circuit for connecting the direct current output circuit and the alternating current output circuit; the direct current output circuit is connected with the direct current power supply module, and the command transceiver module programs the direct current output circuit according to the power supply switching command so that the direct current power supply module provides direct current power supply for the power supply module to be tested; the alternating current output circuit is connected with the alternating current power supply module, and the command transceiver module programs the alternating current output circuit according to the power supply switching command, so that the alternating current power supply module provides alternating current power supply for the power supply module to be tested.
Specifically, the direct-current output circuit comprises a double-pole double-throw relay K3, and two ends of an electromagnetic coil K3A of the double-pole double-throw relay K3 are connected with a diode D3 in parallel; the first pin of the electromagnetic coil K3A is connected with an internal 24V power supply, and the eighth pin of the electromagnetic coil K3A is connected with one end of the diode D5 and the third pin of the field effect transistor QW 6; the other end of the diode D5 is connected with one end of a diode D6, the other end of the diode D6 is connected with a second pin of the photoelectric coupler U3, a first pin of the photoelectric coupler U3 is connected with one end of a resistor RW14, and the other end of the resistor RW14 is connected with an internal 24V power supply; the fourth pin of the photoelectric coupler U3 is connected with an internal 5V power supply; the third pin of the photocoupler U3 is connected with one ends of the resistors RW19 and RW23, the other end of the resistor RW23 is grounded, and the other end of the resistor RW19 is connected with one end of the resistor RW20 and the first pin of the field effect transistor QW 3; the other end of the resistor RW20 is grounded; the second pin of the field effect transistor QW3 is grounded; the third pin of the field effect tube QW3 is connected with one end of a resistor RW8, and the other end of the resistor RW8 is connected with a direct current conduction indicator lamp; the second pin of the fet QW6 is grounded and one end of the resistor RW15, the other end of the resistor RW15 is connected to the first pin of the fet QW6 and one end of the resistor RW11, and the other end of the resistor RW11 is connected to the third pin of the line driver U7. One end of each of the contactors K3B and K3C of the double-pole double-throw relay K3 is connected with the output end of the direct-current power supply module, and the other ends of the contactors K3B and K3C are connected with the power supply module to be tested to provide direct-current power supply for the power supply module to be tested.
The alternating current output circuit comprises a double-pole double-throw relay K4, and two ends of an electromagnetic coil K4A of the double-pole double-throw relay K4 are connected with a diode D8 in parallel; the first pin of the electromagnetic coil K4A is connected with an internal 24V power supply, and the eighth pin of the electromagnetic coil K4A is connected with one end of the diode D9 and the third pin of the field effect transistor QW 10; the other end of the diode D9 is connected with one end of the diode D10, the other end of the diode D10 is connected with the second pin of the photoelectric coupler U4, the first pin of the photoelectric coupler U4 is connected with one end of the resistor RW28, and the other end of the resistor RW28 is connected with an internal 24V power supply; the fourth pin of the photoelectric coupler U4 is connected with an internal 5V power supply; the third pin of the photocoupler U4 is connected to one ends of the resistors RW30 and RW32, the other end of the resistor RW32 is grounded, and the other end of the resistor RW30 is connected to one end of the resistor RW31 and the first pin of the field-effect transistor QW 9; the other end of the resistor RW31 is grounded; the second pin of the field effect transistor QW9 is grounded; the third pin of the field effect transistor QW9 is connected with one end of a resistor RW26, and the other end of the resistor RW26 is connected with an alternating current conduction indicator lamp; the second pin of the fet QW10 is grounded and one end of the resistor RW29, the other end of the resistor RW29 is connected to the first pin of the fet QW10 and one end of the resistor RW27, and the other end of the resistor RW27 is connected to the fourth pin of the line driver U7. One end of each of the contactors K4B and K4C of the double-pole double-throw relay K4 is connected with the output end of the alternating current power supply module, and the other ends of the contactors K4B and K4C are connected with the power supply module to be tested to provide alternating current power supply for the power supply module to be tested.
The output interlocking circuit comprises field effect transistors QW7 and QW8; the first pin of the field effect transistor QW7 is connected with one ends of the resistors RW18 and RW21, the other end of the resistor RW21 is grounded, and the other end of the resistor RW18 is connected with the third pin of the line driver U7; the second pin of the field effect transistor QW7 is grounded, and the third pin of the field effect transistor QW7 is connected with the first pin of the field effect transistor QW 10; the first pin of the field effect transistor QW8 is connected with one ends of the resistors RW24 and RW25, the other end of the resistor RW24 is grounded, and the other end of the resistor RW25 is connected with the fourth pin of the line driver U7; the second pin of the field effect transistor QW8 is grounded, and the third pin of the field effect transistor QW8 is connected with the first pin of the field effect transistor QW 6.
The multichannel load switching module consists of a plurality of double-pole double-throw relays; the electromagnetic coil of the double-pole double-throw relay is connected with the instruction receiving and transmitting module, two ends of one contactor of the double-pole double-throw relay are respectively connected with the positive end of the electronic load instrument and the power supply access terminal, and the power supply access terminal is connected with the output interface of the power supply module to be tested; two ends of the other contactor of the double-pole double-throw relay are respectively grounded and the negative end of the electronic load instrument.
Specifically, the multichannel load switching module consists of 5 double-pole double-throw relays, wherein one double-pole double-throw relay forms a channel between the electronic load instrument and the power module to be tested; the circuit of the load switching module of any channel is specifically as follows: the first pin of the field effect tube QW13 is connected with one end of a resistor RP4, and the second pin of the field effect tube is connected with one end of a resistor RP 5; the other end of the resistor RP4 is connected with the other end of the resistor RP5 and is connected with an output terminal of the line driver U6; the third pin of the field effect tube QW13 is connected with the sixteenth pin of an electromagnetic module K7A of the double-pole double-throw relay K7, the first pin of the electromagnetic module K7A is connected with an internal 24V power supply, and two ends of the electromagnetic module K7A are connected with a diode D13 in parallel;
the fourth pin of a contactor K7B of the double-pole double-throw relay K7 is connected with the negative end of the electronic load instrument, the sixth pin of the contactor K7B is in idle connection, and the eighth pin of the contactor K7B is grounded; a thirteenth pin of a contactor K7C of the double-pole double-throw relay K7 is connected with the positive end of the electronic load instrument, a ninth pin of the contactor K7C is connected with a power supply access terminal, and the power supply access terminal is connected with an output interface of the power supply module to be tested; the eleventh pin of the contactor K7C is empty.
The ripple signal connection module comprises an SMA connector and ripple signal connection circuits connected in parallel at two ends of the SMA connector; one end of the ripple signal connection circuit is connected with the power supply access terminal, and the other end of the ripple signal connection circuit is grounded; the ripple signal connecting circuit transmits the ripple signal output by the power module to be measured to the digital oscilloscope module for measurement through the SMA connector.
Specifically, the ripple signal connection circuit is: one end of each of the capacitors C10, C12 and C14 is connected in parallel with two ends of the SMA connector P4, and the other ends of the capacitors C10, C12 and C14 are grounded; one end of the capacitor C10 is also connected with one end of the resistor RL3, the other end of the resistor RL3 is connected with the resistors R38 and R40 and the transient suppression diode Z3, the other end of the resistor R38 is connected with the ninth pin of the contactor K7C, and the resistor R40 and the transient suppression diode Z3 are grounded.
The signal conditioning circuit of the signal conditioning module is as follows: the first pin of the operational amplifier U9A is connected with the industrial personal computer; the first pin and the second pin of the operational amplifier U9A are connected, one end of a capacitor C19 is connected, and the other end of the capacitor C19 is connected with one end of a resistor R48 and one end of a resistor R49; the other end of the resistor R49 is connected with a third pin of the operational amplifier U9A, the third pin of the operational amplifier U9A is connected with one end of the capacitor C23, and the other end of the capacitor C23 is grounded; the other end of the resistor R48 is connected with a seventh pin of the far-calculation amplifier U9B; the seventh pin of the operational amplifier U9B is connected with the sixth pin; the fifth pin of the operational amplifier U9B is connected with one end of a resistor R47, the other end of the resistor R47 is connected with resistors R46 and R51 and a transient suppression diode Z6, the resistor R51 is connected with the transient suppression diode Z6 and is grounded, and the other end of the resistor R46 is connected with a power supply access terminal; the fourth pin of the operational amplifier U9A is connected with an internal-15V power supply and one end of a capacitor C22, and the other end of the capacitor C22 is grounded; the eighth pin of the operational amplifier U9A is connected with an internal 15V power supply and one end of a capacitor C18, and the other end of the capacitor C18 is grounded.
The relay driving module comprises a relay driving circuit; the relay driving circuit is connected with the industrial personal computer interface, analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving circuit controls the relay in the switch matrix switching module to act according to the matrix switching signal.
Specifically, the industrial personal computer interfaces comprise industrial personal computer interfaces J1 and J2; the relay driving circuit comprises line drivers U1, U2 and U3; logic gate chips U5, U6, U7, U8, U9, U10, transistor driver arrays U11, U12, and U13. The model numbers of the line drivers U1, U2 and U3 are SN74ACT240DWR; the types of the logic gate chips U5, U6, U7, U8, U9 and U10 are SN74HC08D; the transistor driver arrays U11, U12, and U13 are model MC1413BD.
The first pin of the line driver U1 is connected with one end of a resistor R33 and a nineteenth pin, and the other end of the resistor R33 is grounded; the tenth pin of the line driver U1 is grounded; the twentieth pin of the line driver U1 is connected to one end of the capacitor C11 and an internal 5V power supply, and the other end of the capacitor C11 is grounded.
The second, fourth, sixth, eighth, eleventh, thirteenth, fifteenth, seventeenth pins of the line driver U1 are respectively connected to the twelfth, thirteenth, fourteenth, fifteenth, fifth, sixth, seventh and eighth pins of the industrial personal computer interface J1.
The eighteenth, sixteenth, fourteenth, twelfth, ninth, seventh, fifth and thirteenth pins of the circuit driver U1 are respectively connected to the first, second, fourth, fifth, ninth, tenth, twelfth and thirteenth pins of the logic gate chip U5.
The eighteenth, sixteenth, fourteenth and twelfth pins of the line driver U1 are respectively connected with the second, fifth, tenth and thirteenth pins of the logic gate chip U7; the first pin and the fourth pin of the logic gate chip U7 are connected to the third pin of the logic gate chip U5; the ninth pin and the twelfth pin of the logic gate chip U7 are connected to the sixth pin of the logic gate chip U5; the third, sixth, eighth, and eleventh pins of the logic gate chip U7 are connected to the first, second, third, and fourth pins of the transistor driver array U11, respectively.
The ninth, seventh, fifth and third pins of the line driver U1 are respectively connected with the second, fifth, tenth and thirteenth pins of the logic gate chip U8; the first pin and the fourth pin of the logic gate chip U8 are connected to the eighth pin of the logic gate chip U5; the ninth pin and the twelfth pin of the logic gate chip U8 are connected to the eleventh pin of the logic gate chip U5; the third, sixth and eighth pins of the logic gate chip U8 are connected to the fifth, sixth and seventh pins of the transistor driver array U11.
The seventh pin of the logic gate chip U5 is grounded, the fourteenth pin of the logic gate chip U5 is connected with one end of the capacitor C16 and an internal 5V power supply, and the other end of the capacitor C16 is grounded; the seventh pin of the logic gate chip U7 is grounded, the fourteenth pin of the logic gate chip U7 is connected with one end of the capacitor C17 and an internal 5V power supply, and the other end of the capacitor C17 is grounded; the seventh pin of the logic gate chip U8 is grounded, the fourteenth pin of the logic gate chip U8 is connected with one end of the capacitor C18 and an internal 5V power supply, and the other end of the capacitor C18 is grounded; the eighth pin of the transistor driver array U11 is grounded, the ninth pin of the transistor driver array U11 is connected to one end of the capacitor C21 and an internal 24V power supply, and the other end of the capacitor C21 is grounded.
The first pin of the line driver U3 is connected with one end of a resistor R35 and a nineteenth pin, and the other end of the resistor R35 is grounded; the tenth, fifteenth and seventeenth pins of the line driver U3 are all grounded; the twentieth pin of the line driver U3 is connected with one end of the capacitor C13 and an internal 5V power supply, and the other end of the capacitor C13 is grounded.
The second, fourth, sixth, eighth, eleventh and thirteenth pins of the line driver U3 are respectively connected to the fourth, eleventh, third, tenth, ninth and second pins of the industrial personal computer interface J1.
The seventh, ninth, twelfth, fourteenth, sixteenth and eighteenth pins of the line driver U3 are connected to the second, third, fourth, fifth, sixth and seventh pins of the transistor driver array U12, respectively; a first pin of the transistor driver array U12 is connected with an eleventh pin of the logic gate chip U8; the eighth pin of the transistor driver array U12 is grounded, the ninth pin of the transistor driver array U12 is connected with one end of the capacitor C22 and an internal 24V power supply, and the other end of the capacitor C22 is grounded.
The first pin of the line driver U2 is connected with one end of a resistor R34 and a nineteenth pin, and the other end of the resistor R34 is grounded; the tenth pin of the line driver U2 is grounded; the twentieth pin of the line driver U2 is connected to one end of the capacitor C12 and an internal 5V power supply, and the other end of the capacitor C12 is grounded.
The second, fourth, sixth, eighth, eleventh, thirteenth, fifteenth and seventeenth pins of the line driver U2 are respectively connected with the fifteenth, fourteenth, thirteenth, twelfth, eighth, ninth, tenth and eleventh pins of the industrial personal computer interface J2;
the eighteenth, sixteenth, fourteenth, twelfth, ninth, seventh, fifth and thirteenth pins of the circuit driver U2 are respectively connected to the first, second, fourth, fifth, ninth, tenth, twelfth and thirteenth pins of the logic gate chip U6.
The eighteenth, sixteenth, fourteenth and twelfth pins of the line driver U2 are respectively connected with the second, fifth, tenth and thirteenth pins of the logic gate chip U9; the first pin and the fourth pin of the logic gate chip U9 are connected to the third pin of the logic gate chip U6; the ninth pin and the twelfth pin of the logic gate chip U9 are connected to the sixth pin of the logic gate chip U6; the third, sixth, eighth, and eleventh pins of the logic gate chip U9 are connected to the first, second, third, and fourth pins of the transistor driver array U13, respectively.
The ninth, seventh, fifth and third pins of the line driver U2 are respectively connected with the second, fifth, tenth and thirteenth pins of the logic gate chip U10; the first pin and the fourth pin of the logic gate chip U10 are connected to the eighth pin of the logic gate chip U6; the ninth pin and the twelfth pin of the logic gate chip U10 are connected to the eleventh pin of the logic gate chip U6; the third, sixth and eighth pins of the logic gate chip U10 are connected to the fifth, sixth and seventh pins of the transistor driver array U13.
The seventh pin of the logic gate chip U6 is grounded, the fourteenth pin of the logic gate chip U6 is connected with one end of the capacitor C15 and an internal 5V power supply, and the other end of the capacitor C15 is grounded; the seventh pin of the logic gate chip U9 is grounded, the fourteenth pin of the logic gate chip U9 is connected with one end of the capacitor C19 and an internal 5V power supply, and the other end of the capacitor C19 is grounded; the seventh pin of the logic gate chip U10 is grounded, the fourteenth pin of the logic gate chip U10 is connected with one end of the capacitor C20 and an internal 5V power supply, and the other end of the capacitor C20 is grounded; the eighth pin of the transistor driver array U13 is grounded, the ninth pin of the transistor driver array U13 is connected to one end of the capacitor C23 and an internal 24V power supply, and the other end of the capacitor C23 is grounded.
The switch matrix switching module comprises a plurality of groups of relays, and any group of relays consists of a high-end relay and a low-end relay; the contactor of the high-end relay is connected with the contactor of the low-end relay, an interface terminal is arranged between the contactor of the high-end relay and the contactor of the low-end relay, and the interface terminal is connected with an insulation resistance test interface; the contactor of the high-end relay is connected with the positive end of the insulation tester; the contactor of the low-end relay is connected with the negative end of the insulation tester; the two ends of the electromagnetic coils of the high-end relay and the low-end relay are respectively connected with the relay driving module and the internal 24V power supply.
Specifically, one ends of the electromagnetic coils of the high-side relay and the low-side relay are connected to an internal 24V power supply, and the other ends of the electromagnetic coils of the high-side relay and the low-side relay are connected to tenth to sixteen pins of the transistor driver arrays U11, U12, and U13.
The electronic load instrument, the direct-current power supply module and the alternating-current power supply module are connected into the industrial personal computer through serial port lines to realize communication interaction; the industrial personal computer sends a load adjustment instruction to the electronic load instrument through the serial port line, and the electronic load instrument adjusts the simulated load according to the load adjustment instruction; the industrial personal computer sends an output adjustment instruction to the direct current power supply module and the alternating current power supply module through the serial port line, and the direct current power supply module and the alternating current power supply module adjust output voltage according to the output adjustment instruction.
The embodiments given above are preferred examples for realizing the present invention, and the present invention is not limited to the above-described embodiments. Any immaterial additions and substitutions made by those skilled in the art according to the technical features of the technical scheme of the invention are all within the protection scope of the invention.
Claims (7)
1. The AC/DC power module testing system is characterized by comprising an instruction receiving and transmitting module, a power switching module and a multichannel load switching module, wherein the power switching module and the multichannel load switching module are connected with the instruction receiving and transmitting module;
the industrial personal computer sends a load configuration instruction and a power supply switching instruction to the instruction receiving and sending module;
the instruction transceiver module controls the power switching module to switch the direct current power supply module or the alternating current power supply module to supply power to the power module to be tested according to the power switching instruction; the instruction receiving and transmitting module controls the multichannel load switching module to connect a plurality of loads simulated by the electronic load instrument with the power module to be tested one by one or simultaneously according to the load configuration instruction;
each channel of the multichannel load switching module is provided with a ripple signal connection module and a signal conditioning module; the ripple signal connection module detects the ripple signal output by the power module to be detected and sends the ripple signal to the digital oscilloscope module, the digital oscilloscope module measures the ripple signal to obtain power supply ripple, and the digital oscilloscope module uploads the power supply ripple to the industrial personal computer and displays the power supply ripple on a display of the industrial personal computer; the signal conditioning module acquires an output signal of the power module to be tested under load, the output signal is amplified and filtered by the signal conditioning module and then is uploaded to the industrial personal computer, and a voltage and current acquisition module in the industrial personal computer acquires the output voltage and the output current of the power module to be tested;
the device also comprises an insulation test module, wherein the insulation test module consists of an industrial personal computer interface, a relay driving module, a switch matrix switching module and an insulation test interface which are connected in sequence; the insulation test module is connected with the power module to be tested through an insulation test interface; the insulation resistance tester is connected to two ends of the switch matrix switching module;
the industrial personal computer sends an insulation resistance test instruction to the relay driving module through an industrial personal computer interface, and the relay driving module analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving module controls the switch matrix switching module to act according to the matrix switching signal, the insulation resistance tester tests the insulation resistance of the power module to be tested, and the insulation resistance tester uploads the measured insulation resistance to the industrial personal computer through the serial port line.
2. The AC/DC power module testing system of claim 1, wherein said power switching module comprises a DC output circuit, an AC output circuit, and an output interlock circuit for connecting the two;
the direct current output circuit is connected with the direct current power supply module, and the command transceiver module programs the direct current output circuit according to the power supply switching command so that the direct current power supply module provides direct current power supply for the power supply module to be tested;
the alternating current output circuit is connected with the alternating current power supply module, and the command transceiver module programs the alternating current output circuit according to the power supply switching command, so that the alternating current power supply module provides alternating current power supply for the power supply module to be tested.
3. The AC/DC power module testing system of claim 1, wherein said multi-channel load switching module is comprised of a plurality of double pole double throw relays;
the electromagnetic coil of the double-pole double-throw relay is connected with the instruction receiving and transmitting module, two ends of one contactor of the double-pole double-throw relay are respectively connected with the positive end of the electronic load instrument and the power supply access terminal, and the power supply access terminal is connected with the output interface of the power supply module to be tested; two ends of the other contactor of the double-pole double-throw relay are respectively grounded and the negative end of the electronic load instrument.
4. An AC/DC power module testing system according to claim 3, wherein the ripple signal connection module comprises SMA connectors and ripple signal connection circuits connected in parallel across the SMA connectors; one end of the ripple signal connection circuit is connected with the power supply access terminal, and the other end of the ripple signal connection circuit is grounded; the ripple signal connecting circuit transmits the ripple signal output by the power module to be measured to the digital oscilloscope module for measurement through the SMA connector.
5. The AC/DC power module testing system of claim 1, wherein said switch matrix switching module comprises a plurality of sets of relays, any one of the sets consisting of a high-side relay and a low-side relay;
the contactor of the high-end relay is connected with the contactor of the low-end relay, an interface terminal is arranged between the contactor of the high-end relay and the contactor of the low-end relay, and the interface terminal is connected with an insulation resistance test interface; the contactor of the high-end relay is connected with the positive end of the insulation tester; the contactor of the low-end relay is connected with the negative end of the insulation tester;
the two ends of the electromagnetic coils of the high-end relay and the low-end relay are respectively connected with the relay driving module and the internal 24V power supply.
6. The AC/DC power module testing system of claim 5, wherein said relay driver module comprises a relay driver circuit; the relay driving circuit is connected with the industrial personal computer interface, analyzes the insulation resistance test instruction and obtains a matrix switching signal; the relay driving circuit controls the relay in the switch matrix switching module to act according to the matrix switching signal.
7. The system for testing the AC/DC power supply module according to claim 1, wherein the electronic load instrument, the direct current power supply module and the alternating current power supply module are connected into the industrial personal computer through serial ports to realize communication interaction;
the industrial personal computer sends a load adjustment instruction to the electronic load instrument through the serial port line, and the electronic load instrument adjusts the simulated load according to the load adjustment instruction; the industrial personal computer sends an output adjustment instruction to the direct current power supply module and the alternating current power supply module through the serial port line, and the direct current power supply module and the alternating current power supply module adjust output voltage according to the output adjustment instruction.
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