High-power converter detection circuit
By designing a high-power converter detection circuit, using the input and output side detection units and water-cooled circulation machine, the load mismatch problem in traditional detection methods is solved, and the full power operation and detection accuracy of the high-power converter is achieved.
Patent Information
- Application Number
- CN202421937405.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-08-09
AI Technical Summary
Traditional detection methods only focus on parameter testing of the high-power converter itself, and ignore load testing, resulting in load mismatch problems and cannot guarantee the full power operation of the high-power converter.
A high-power converter detection circuit is designed, including an input-side detection unit and an output-side detection unit. It adopts multiple load reactors and water-cooled circulation machines to detect through an ammeter, a voltmeter and a digital display meter, and cool and heat dissipate under full power state.
It ensures that the high-power converter is inspected under normal power supply, and the testing is achieved under full-power operating conditions, which improves the accuracy and reliability of detection. At the same time, the temperature of the converter is reduced through cooling and protects the equipment.
Smart Images
Figure CN223259813U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of electronic equipment detection, and in particular to a high-power converter detection circuit. Background Art
[0002] With the development of power electronics technology, high-power converters are increasingly used in energy conversion and power transmission. To ensure the normal operation and stable performance of high-power converters, comprehensive testing is required.
[0003] Traditional testing methods usually only focus on parameter testing of the high-power converter itself, but pay insufficient attention to load testing. This may lead to load mismatch problems in actual applications, making it impossible to ensure that the high-power converter can operate at full power. Utility Model Content
[0004] In order to relatively simply implement detection work on the output side of a high-power converter, the present application provides a high-power converter detection circuit.
[0005] The present application provides a high-power converter detection circuit that adopts the following technical solution:
[0006] A high-power converter detection circuit includes an input-side detection unit and an output-side detection unit. External three-phase alternating current is input to the input end of the high-power converter through the input-side detection unit. The output side of the high-power converter is electrically connected to the output-side detection unit. The output-side detection unit includes multiple load inductors electrically connected to the output side of the high-power converter. The high-power converter is also connected to a cooling unit.
[0007] By adopting the above technical solution, an input-side detection unit is provided to detect whether the power supply of the high-power converter is normal. Only when the power supply is normal can the high-power converter be tested normally. By using multiple load inductors, the high-power converter can be tested under full-power working conditions. On this basis, since the high-power converter generates a large amount of heat during the full-power process, the cooling unit can cool the high-power converter and dissipate the heat, thereby ensuring that the high-power converter can operate normally to the greatest extent.
[0008] Preferably, the output side detection unit includes a load inductor L1, a load inductor L2 and a load inductor L3, the output end OUT1 of the high-power converter is electrically connected to one end of the load inductor L1 through a U-phase ammeter, the output end OUT2 of the high-power converter is electrically connected to one end of the load inductor L2 through a V-phase ammeter, the output end OUT3 of the high-power converter is electrically connected to one end of the load inductor L3 through a W-phase ammeter, and the other end of the load inductor L1 and the other end of the load inductor L2 are both electrically connected to the other end of the load inductor L3.
[0009] By adopting the above technical solution, the current on the output side of the high-power converter under full-power working conditions can be measured by setting the U-phase ammeter, the V-phase ammeter and the W-phase ammeter.
[0010] Preferably, the input side detection unit includes a three-phase AC voltage regulator, a three-phase dry-type isolation transformer and a rectifier module. The three-phase AC power is electrically connected to the input end of the three-phase dry-type isolation transformer through the three-phase AC voltage regulator, and the output end of the three-phase dry-type isolation transformer is electrically connected to the input end of the high-power converter through the rectifier module.
[0011] By adopting the above technical solution, the three-phase AC power can be regulated by a three-phase AC voltage regulator, the regulated AC power can be increased by a coherent isolation transformer, and finally the AC power can be converted into DC power by a rectifier module to supply power to a high-power converter.
[0012] Preferably, the input side detection unit further includes three ammeters, which are configured as an A-phase ammeter, a B-phase ammeter and a C-phase ammeter, and the three ammeters are respectively connected in series to the three output ends of the three-phase dry-type isolation transformer.
[0013] By adopting the above technical solution, the output current of the three-phase dry-type isolation transformer can be detected by setting three ammeters.
[0014] Preferably, the input side detection unit also includes three voltmeters, which are set as an AB phase voltmeter, a BC phase voltmeter and an AC phase voltmeter, the two ends of the AB phase voltmeter are respectively electrically connected to the first output end and the second output end of the three-phase dry-type isolation transformer, the two ends of the BC phase voltmeter are respectively electrically connected to the second output end and the third output end of the three-phase dry-type isolation transformer, and the two ends of the AC phase voltmeter are respectively electrically connected to the first output end and the third output end of the three-phase dry-type isolation transformer.
[0015] By adopting the above technical solution, the output voltage of the three-phase dry-type isolation transformer can be detected by setting three voltmeters.
[0016] Preferably, the first output end of the rectifier module is electrically connected to the positive phase input end of the high-power converter through the voltage-dividing resistor R1, and the second output end of the rectifier module is electrically connected to the negative phase output end of the high-power converter; the input side detection unit also includes a digital ammeter and a digital voltmeter, and the two ends of the digital ammeter are respectively electrically connected to the two ends of the voltage-dividing resistor R1, and the two ends of the digital voltmeter are respectively electrically connected to the first input end and the second input end of the rectifier module.
[0017] By adopting the above technical solution, the output current and voltage of the rectifier module can be detected by setting a digital ammeter and a digital voltmeter.
[0018] Preferably, the input-side detection unit further includes a three-phase control switch K1 , and the three-phase AC power is electrically connected to the input end of the three-phase AC voltage regulator through the three-phase control switch K1 .
[0019] By adopting the above technical solution and setting the three-phase control switch K1, it is possible to more conveniently control the power on or off of the high-power converter.
[0020] Preferably, the cooling unit includes a water-cooled circulation machine, and the water-cooled circulation machine is connected to a water outlet pipe and a water inlet pipe; the high-power converter is provided with a water inlet and a water outlet, the end of the water outlet pipe away from the water-cooled circulation machine is connected to the water inlet, and the end of the water inlet pipe away from the water-cooled circulation machine is connected to the water outlet.
[0021] By adopting the above technical solution, the water-cooled circulation machine can deliver cooling water to the water inlet of the high-power converter, and utilize the large heat capacity and good thermal conductivity of water to quickly absorb the heat generated by the AC, thereby effectively reducing the temperature of the high-power converter under full-power operation; at the same time, the water-cooled circulation machine can continuously deliver cooling water to the AC, and bring the water that has absorbed heat back to the water-cooled circulation machine through the water inlet pipe for cooling, and then recycle it, ensuring the long-term stability of the AC operation.
[0022] In summary, this application includes at least one of the following beneficial technical effects:
[0023] 1. Multiple ammeters, multiple voltmeters, digital ammeters, and digital voltmeters are used to test the input side of the high-power converter to ensure that the external AC power can provide the normal operating voltage during the test.
[0024] 2. By setting up multiple load reactors, the high-power converter can complete the output-side detection at full power;
[0025] 3. To address the high-temperature issues that may occur when high-power converters are running at full power, a water cooling unit can be installed to cool the high-power converters operating at full power. This not only effectively dissipates heat and protects the converter from overheating damage, but also improves the accuracy and reliability of the overall detection process. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 This is a principle block diagram of an embodiment of the present application;
[0027] Figure 2 is a circuit diagram of an input side detection unit in an embodiment of the present application;
[0028] Figure 3 This is a ground diagram of the output side detection unit and a connection diagram of the cooling unit in an embodiment of the present application.
[0029] Figure numerals: 1. Input side detection unit; 11. Three-phase AC voltage regulator; 12. Three-phase dry-type isolation transformer; 13. Rectifier module; 2. Output side detection unit; 3. Cooling unit; 31. Cooling circulation machine; 32. Water inlet pipe; 33. Water outlet pipe; 4. Controller; 5. Control panel. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-3 This application is described in further detail.
[0031] The embodiments of the present application disclose a high-power converter detection circuit.
[0032] Reference Figure 1 A high-power converter detection circuit is based on a high-power converter, and includes an input-side detection unit 1 and an output-side detection unit 2. Three-phase alternating current is electrically connected to the input end of the input-side detection unit 1 through a three-phase cable, and the output end of the input-side detection unit 1 is electrically connected to the input end of the high-power converter, so as to realize power supply while also being able to detect and monitor the input voltage of the high-power converter. The output end of the high-power converter is electrically connected to the output-side detection unit 2, and the output-side detection unit 2 can detect the working state of the high-power converter at full power. In addition, the high-power converter is also connected to a cooling unit 3. Since the high-power converter generates severe internal heat during full-power operation, the cooling unit 3 can cool the high-power converter, thereby enabling the high-power converter to operate normally.
[0033] Reference Figure 2 and Figure 3The input-side detection unit 1 includes a three-phase control switch K1, a three-phase AC voltage regulator 11, a three-phase dry-type isolation transformer 12, and a rectifier module 13. The three-phase cables are electrically connected to one end of the three-phase control switch K1, and the other end of the three-phase control switch K1 is electrically connected to the input end of the three-phase AC voltage regulator 11. The three-phase AC voltage regulator 11 can be used to adjust the voltage of the three-phase cable so as to meet the power supply conditions of the subsequent high-power converter. The output end of the three-phase AC voltage regulator 11 is electrically connected to the input end of the three-phase dry-type isolation transformer 12. During power transmission, the three-phase dry-type isolation transformer 12 can increase the output voltage of the three-phase AC voltage regulator 11 and play an isolation role, thereby improving power safety and power quality.
[0034] The three-phase output end of the three-phase dry-type isolation transformer 12 is electrically connected to a plurality of detection meters. In this embodiment, six detection meters are provided, including three ammeters and three voltmeters. The six detection meters are respectively provided as an A-phase ammeter, a B-phase ammeter, a C-phase ammeter, an AB-phase voltmeter, a BC-phase voltmeter, and an AC-phase voltmeter. The A-phase ammeter, the B-phase ammeter, and the C-phase ammeter are respectively connected in series to pins 4, 5, and 6 of the three-phase dry-type isolation transformer 12. The two ends of the AB-phase voltmeter are respectively electrically connected to pins 4 and 5 of the three-phase dry-type isolation transformer 12, the two ends of the BC-phase voltmeter are respectively electrically connected to pins 5 and 6 of the three-phase dry-type isolation transformer 12, and the two ends of the AC-phase voltmeter are respectively electrically connected to pins 4 and 6 of the three-phase dry-type isolation transformer 12. The output current and voltage of the three-phase dry-type isolation transformer 12 can be detected by multiple detection meters, and it is convenient for the staff to adjust the three-phase AC voltage regulator 11.
[0035] The output of the three-phase dry-type isolation transformer 12 is electrically connected to the input of the rectifier module 13. The first output of the rectifier module 13 is electrically connected to the positive-phase input terminal IN+ of the high-power converter via a voltage-dividing resistor R1. The second output of the rectifier module 13 is electrically connected to the negative-phase input terminal IN- of the high-power converter. In this embodiment, the rectifier module 13 comprises a three-phase bridge circuit consisting of six diodes. Its primary function is to rectify three-phase AC power into DC power.
[0036] A voltage-dividing resistor R1 is connected in series between the first output terminal of the rectifier module 13 and the positive-phase input terminal IN+ of the high-power converter. By providing this voltage-dividing resistor, the output voltage of the rectifier module 13 can be reduced to meet the rated voltage of the high-power converter. A digital ammeter is connected in parallel across the two ends of the voltage-dividing resistor R1, allowing relevant personnel to observe the input current to the high-power converter in real time. A digital voltmeter is also included, with its two ends electrically connected to the first output terminal of the rectifier module 13 and the second output terminal of the rectifier module 13, respectively, allowing relevant personnel to observe the input voltage to the high-power converter in real time.
[0037] Reference Figure 2 The output side detection unit 2 includes a plurality of load reactors electrically connected to the output side of the high-power converter, so that the high-power converter can operate at full power to meet the test conditions. In this embodiment, there are three load reactors, which are respectively set as load reactor L1, load reactor L2 and load reactor L3. The output end OUT1 of the high-power converter is electrically connected to one end of the load reactor L1 through the U-phase ammeter, the output end OUT2 of the high-power converter is electrically connected to one end of the load reactor L2 through the V-phase ammeter, and the output end OUT3 of the high-power converter is electrically connected to one end of the load reactor L3 through the W-phase ammeter. The other end of the load reactor L1 and the other end of the load reactor L2 are both electrically connected to the other end of the load reactor L3.
[0038] Reference Figure 3 The cooling unit 3 includes a water-cooled circulator, connected to a water outlet pipe 33 and a water inlet pipe 32. The high-power converter is equipped with a water inlet and outlet. The end of the water outlet pipe 33, remote from the water-cooled circulator, is connected to the water inlet, while the end of the water inlet pipe 32, remote from the water-cooled circulator, is connected to the water outlet. This enables circulating water cooling and reduces the temperature of the high-power converter when operating at full power. Before testing, turn on the water-cooled circulator to check for leaks. Once the leaks are confirmed, power it on for testing.
[0039] Reference Figure 3 This embodiment further includes a controller 4 and a control panel 5 communicatively connected to the controller 4. The power output of the high-power converter is electrically connected to the power supply of the controller 4, thereby providing an operating voltage to the controller 4. The signal output of the controller 4 is electrically connected to the signal input of the high-power converter, allowing personnel to input a test start command through the control panel 5 and activate the high-power converter through the controller 4. The signal output of the high-power converter is electrically connected to the signal input of the controller 4, thereby enabling detection of abnormal current.
[0040] The high-power converter testing process is as follows: After verifying that there are no water leaks in the cooling unit 3, switch K1 is closed, allowing three-phase AC power to be input into the three-phase AC voltage regulator 11. The three-phase AC voltage regulator 11 is then slowly rotated to adjust the voltage input to the three-phase dry-type isolation transformer 12, which is then input to the high-power converter through the rectifier module 13. In this embodiment, 380V three-phase AC power is used as an example. By adjusting the three-phase AC voltage regulator 11, the output side of the three-phase AC voltage regulator 11 can be adjusted to 310V three-phase AC power. After the 310V three-phase AC power passes through the three-phase dry-type isolation transformer 12, the voltage values displayed on the AB phase voltmeter, the BC phase voltmeter, and the AC phase voltmeter all detect an AC voltage of approximately 645V. After passing through the rectifier module 13, the digital voltmeter detects a DC voltage of approximately 900V. Under full power working condition, the abnormal current on the output side of the high-power converter is detected by detecting the displayed values on the U-phase ammeter, V-phase ammeter and W-phase ammeter.
[0041] The implementation principle of a high-power converter detection circuit in an embodiment of the present application is as follows: by setting up multiple detection meters, digital ammeters and digital voltmeters, the input side of the high-power converter is detected, and by setting up multiple load inductors, the high-power converter can complete the detection of the output side under full power state, and by setting up a water cooling unit, the high-power converter working at full power state can be cooled, thereby protecting the high-power converter and improving the accuracy of the overall detection.
[0042] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A high-power converter detection circuit, characterized in that: The invention comprises an input side detection unit (1) and an output side detection unit (2), wherein external three-phase alternating current is input to the input end of the high-power converter via the input side detection unit (1), and the output side of the high-power converter is electrically connected to the output side detection unit (2); the high-power converter is also connected to a cooling unit (3).
2. A high-power converter detection circuit according to claim 1, characterized in that: The output side detection unit (2) includes a load reactor L1, a load reactor L2 and a load reactor L3, the output end OUT1 of the high-power converter is electrically connected to one end of the load reactor L1 through a U-phase ammeter, the output end OUT2 of the high-power converter is electrically connected to one end of the load reactor L2 through a V-phase ammeter, the output end OUT3 of the high-power converter is electrically connected to one end of the load reactor L3 through a W-phase ammeter, and the other end of the load reactor L1 and the other end of the load reactor L2 are both electrically connected to the other end of the load reactor L3.
3. The high-power converter detection circuit according to claim 1, wherein: The input side detection unit (1) includes a three-phase AC voltage regulator (11), a three-phase dry-type isolation transformer (12) and a rectifier module (13); the three-phase AC power is electrically connected to the input end of the three-phase dry-type isolation transformer (12) through the three-phase AC voltage regulator (11); the output end of the three-phase dry-type isolation transformer (12) is electrically connected to the input end of the high-power converter through the rectifier module (13).
4. A high-power converter detection circuit according to claim 3, characterized in that: The input side detection unit (1) further comprises three ammeters, which are configured as an A-phase ammeter, a B-phase ammeter and a C-phase ammeter, and the three ammeters are respectively connected in series to the three output ends of the three-phase dry-type isolation transformer (12).
5. The high-power converter detection circuit according to claim 3, characterized in that: The input side detection unit (1) further includes three voltmeters, which are configured as an AB phase voltmeter, a BC phase voltmeter, and an AC phase voltmeter. The two ends of the AB phase voltmeter are respectively electrically connected to the first output end and the second output end of the three-phase dry-type isolation transformer (12). The two ends of the BC phase voltmeter are respectively electrically connected to the second output end and the third output end of the three-phase dry-type isolation transformer (12). The two ends of the AC phase voltmeter are respectively electrically connected to the first output end and the third output end of the three-phase dry-type isolation transformer (12).
6. A high-power converter detection circuit according to claim 3, characterized in that: The first output end of the rectifier module (13) is electrically connected to the positive phase input end of the high-power converter via a voltage-dividing resistor R1, and the second output end of the rectifier module (13) is electrically connected to the negative phase output end of the high-power converter; the input-side detection unit (1) further comprises a digital ammeter and a digital voltmeter, wherein the two ends of the digital ammeter are electrically connected to the two ends of the voltage-dividing resistor R1, and the two ends of the digital voltmeter are electrically connected to the first input end and the second input end of the rectifier module (13).
7. A high-power converter detection circuit according to claim 3, characterized in that: The input-side detection unit (1) further comprises a three-phase control switch K1, and the three-phase alternating current is electrically connected to the input end of the three-phase alternating current voltage regulator (11) via the three-phase control switch K1.
8. The high-power converter detection circuit according to claim 1, characterized in that: The cooling unit (3) includes a water-cooling circulation machine, and the water-cooling circulation machine is connected to a water outlet pipe (33) and a water inlet pipe (32); a water inlet and a water outlet are provided on the high-power converter, and an end of the water outlet pipe (33) away from the water-cooling circulation machine is connected to the water inlet, and an end of the water inlet pipe (32) away from the water-cooling circulation machine is connected to the water outlet.