PSM short-wave broadcast transmitter power module testing device

Abstract

The utility model discloses a testing device for a power module of a PSM short-wave broadcast transmitter. The testing device comprises a power supply unit, a voltage regulator, an on-off device, an AC contactor, a first measuring device, a second measuring device, a third measuring device and a dummy load. Corresponding interfaces of the power supply unit are respectively connected with the voltage regulator and the alternating current contactor; the voltage regulator is respectively connected with the first measuring device and a three-phase rectifier bridge in the power module to be tested through an alternating current contactor; the three-phase rectifier bridge is respectively connected with the second measuring device and the IGBT module in the power module; the IGBT module is connected with the dummy load through a third measuring device; the alternating current contactor is connected with a corresponding interface of the power supply unit through the on-off device. The working environment of the single-stage power module of the PSM short-wave broadcast transmitter can be simulated, so that off-line detection of the power module is realized, and a fault part in the power module can be quickly positioned.

Description

Technical Field

[0001] This utility model relates to the field of debugging tools, and more specifically to a test device for the power module of a PSM shortwave broadcast transmitter. Background Technology

[0002] The final stage DC voltage of the power amplifier in a PSM (Pulse Skip Modulation) shortwave radio transmitter is formed by connecting the DC voltages output from 48 power modules in series. These power modules contain key components such as rectifier bridges and IGBTs (Insulated Gate Bipolar Transistors). Because they operate under high voltage, high current, and high-frequency switching conditions for extended periods, these components are prone to damage. Therefore, the inspection and maintenance of the power modules is a key aspect of equipment maintenance.

[0003] Current technology relies solely on multimeters for repair and testing. However, multimeter testing cannot comprehensively check whether all components and functions of the power module are functioning correctly; repeated on-machine testing is required, which presents the following problems:

[0004] Low safety: Direct testing may cause transmitter failure due to incomplete repair of the power module;

[0005] Low efficiency: Disassembly and installation are time-consuming, and testing is not possible due to the limited broadcast time of the transmitter;

[0006] There are blind spots in testing: Multimeters can only perform static device testing and cannot simulate the actual working conditions of power modules, nor can they test the dynamic switching performance of power modules.

[0007] Therefore, how to simulate the working environment of a single-stage power module in a PSM shortwave broadcast transmitter, and thus achieve offline testing of the power module, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0008] In view of this, the present invention provides a PSM shortwave broadcast transmitter power module testing device, which can simulate the working environment of a single-stage power module of a PSM shortwave broadcast transmitter, thereby realizing offline testing of the power module and helping to quickly locate the faulty parts in the power module.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A PSM shortwave broadcast transmitter power module testing device includes: a power supply unit, a voltage regulator, a switching device, an AC contactor, a first measuring device, a second measuring device, a third measuring device, and a dummy load;

[0011] The corresponding interfaces of the power supply unit are respectively connected to the voltage regulator and the AC contactor;

[0012] The voltage regulator is connected to the first measuring device and the three-phase rectifier bridge in the power module to be tested via the AC contactor.

[0013] The three-phase rectifier bridge is connected to the second measuring device and the IGBT module in the power module, respectively.

[0014] The IGBT module is connected to the dummy load via the third measuring device;

[0015] The AC contactor is connected to the corresponding interface of the power supply unit through the switching device.

[0016] Preferably, the corresponding interfaces of the power supply unit include a 220V power interface and a 380V power interface;

[0017] The 220V power interface is connected to the AC contactor and the switching device to form a control circuit connection.

[0018] The 380V power interface is connected to the voltage regulator.

[0019] Preferably, it also includes an air switch;

[0020] Both the 380V power interface and the 220V power interface are connected to the voltage regulator and the AC contactor respectively via the air switch.

[0021] Preferably, one end of the main contact of the AC contactor is connected to the output end of the voltage regulator; the other end of the main contact is connected to the first measuring device and the three-phase rectifier bridge, respectively.

[0022] Preferably, the closing / disconnecting device includes: a closing button and a disconnecting button;

[0023] One end of the cut button is connected to the neutral wire of the 220V power interface through the coil in the AC contactor;

[0024] The other end of the cut button is connected to one end of the close button;

[0025] The other end of the button is connected to the live wire of the 220V power interface;

[0026] The normally open auxiliary contact in the AC contactor is connected in parallel to both ends of the push button.

[0027] Preferably, the first measuring device is an AC voltmeter;

[0028] The second measuring device is a DC voltmeter;

[0029] The third measuring device is a DC ammeter.

[0030] Preferably, it also includes: an operating table;

[0031] The operating table includes: a support, a tabletop, a back panel, a first side panel, and a second side panel;

[0032] The platform is horizontally positioned at the top of the bracket;

[0033] The back plate is located behind the bracket and is fixedly connected to the upper surface of the table.

[0034] The first side plate and the second side plate are respectively disposed on both sides of the bracket, and both are fixedly connected to the lower surface of the table.

[0035] Preferably, the AC voltmeter, the DC voltmeter, and the DC ammeter are all mounted on the back plate;

[0036] The on / off button, the off button, and the power module are mounted on the table surface;

[0037] The air switch and the AC contactor are mounted on the first side plate;

[0038] The dummy load is set on the second side plate.

[0039] Preferably, the table surface is provided with antistatic rubber;

[0040] The bracket, the tabletop, the back plate, the first side plate, and the second side plate are all made of aluminum alloy.

[0041] Preferably, the dummy load is a high-power corrugated wire wound load resistor.

[0042] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a PSM shortwave broadcast transmitter power module testing device. This utility model adopts an offline testing method, which can perform online testing simulation of a single-stage power module at any time, without being limited by the broadcast time of the transmitter, and avoids the problem of low testing efficiency caused by repeated on-machine testing. By setting up a switching device, the power supply can be cut off in time if an abnormality occurs during the power module testing process, so as to avoid damage to the power module. The working voltage of the power module is gradually increased by adjusting the voltage regulator, which protects the device while simulating the working environment of the power module. The power module test platform is grounded and the test platform surface is equipped with insulating rubber. The power supply and disconnection of the power module can be quickly realized by controlling the switching of the AC contactor, thereby ensuring the safety of the power module under test and the operator. By plugging and unplugging the optical fiber of the power module and reading the reading of the measuring device, it is easy and quick to detect whether the power module is functioning normally and to quickly locate the fault part of the power module. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0044] Figure 1 A schematic diagram of a PSM shortwave broadcast transmitter power module testing device provided by this utility model.

[0045] Figure 2 A schematic diagram of a PSM shortwave broadcast transmitter power module testing device provided by this utility model.

[0046] Figure 3 A schematic diagram of a PSM shortwave broadcast transmitter power module testing device provided by this utility model.

[0047] Figure 4 A schematic diagram illustrating the practical application of a PSM shortwave broadcast transmitter power module testing device provided by this utility model.

[0048] Figure 5 A side view of the actual application of the PSM shortwave broadcast transmitter power module testing device provided by this utility model.

[0049] Reference numerals: 1—Power supply unit, 2—Voltage regulator, 3—Closing / breaking device, AN1—Closing button, AN2—Breaking button, 4—AC contactor, KM—Coil, KM-1—Normally open auxiliary contact, KM-2—Main contact, 5—First measuring device, 6—Second measuring device, 7—Third measuring device, 8—Dummy load, 9—Power module, 91—Three-phase rectifier bridge, 92—IGBT module, K1—Air switch, 10—Operating console, 101—Bracket, 102—Tabletop, 103—Back plate, 104—First side plate and 105—Second side plate. Detailed Implementation

[0050] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0051] Example 1

[0052] like Figure 1As shown in the figure, this utility model embodiment discloses a PSM shortwave broadcast transmitter power module testing device, including: a power supply unit 1, a voltage regulator 2, a switching device 3, an AC contactor 4, a first measuring device 5, a second measuring device 6, a third measuring device 7, and a dummy load 8;

[0053] The corresponding interfaces of power supply unit 1 are connected to voltage regulator 2 and AC contactor 4 respectively;

[0054] The voltage regulator 2 is connected to the first measuring device 5 and the three-phase rectifier bridge 91 in the power module to be tested via the AC contactor 4.

[0055] The three-phase rectifier bridge 91 is connected to the second measuring device 6 and the IGBT module 92 in the power module, respectively.

[0056] IGBT module 92 is connected via third measuring device 7 and dummy load 8;

[0057] The AC contactor 4 is connected to the corresponding interface of the power supply unit 1 through the closing device 3.

[0058] Example 2

[0059] like Figure 2 As shown in the figure, this utility model embodiment discloses a PSM shortwave broadcast transmitter power module testing device, including: a power supply unit 1, a voltage regulator 2, a switching device 3, an AC contactor 4, a first measuring device 5, a second measuring device 6, a third measuring device 7, and a dummy load 8.

[0060] The corresponding interfaces of power supply unit 1 are connected to voltage regulator 2 and AC contactor 4, respectively.

[0061] Preferably, the corresponding interfaces of the power supply unit 1 include a 220V power interface and a 380V power interface;

[0062] The 220V power interface is connected to the AC contactor 4 and the closing device 3 to form a control circuit connection;

[0063] The 380V power interface is connected to voltage regulator 2.

[0064] The voltage regulator 2 is connected to the first measuring device 5 and the three-phase rectifier bridge 91 in the power module to be tested via the AC contactor 4.

[0065] Preferably, in this embodiment, the voltage regulator 2 is a three-phase voltage regulator with a rated capacity of 9KVA, a rated input voltage of 380V, a rated output voltage of 0-430V, and a rated output current of 12A.

[0066] Preferably, in this embodiment, the AC contactor 4 is a general-purpose AC contactor with a working current of 16A and a coil voltage of 220V. Its main structure includes a coil KM, a normally open auxiliary contact KM-1, and a main contact KM-2.

[0067] Preferably, the output end of the voltage regulator 2 is connected to the upper end of the main contact KM-2 of the AC contactor 4, and the lower end of the main contact KM-2 of the AC contactor 4 is connected to the three-phase rectifier bridge 91 in the power module 9 to be tested; two of the lower ends of the main contacts KM-2 of the AC contactor 4 are connected to the first measuring device 5.

[0068] Preferably, the main contacts are driven to engage and disengage by the coil KM in the AC contactor 4, which enables the rapid connection and disconnection of the main circuit (380V line).

[0069] Preferably, it also includes an air switch K1;

[0070] Both the 380V and 220V power interfaces are connected to the voltage regulator and AC contactor via air switch K1.

[0071] Preferably, the 380V power interface is connected to the input terminal of the voltage regulator 2 via the air switch K1; the 220V power interface is connected in series with the closing device (where the normally open auxiliary contact KM-1 of the AC contactor 4 is connected in parallel across the two ends of the closing button AN1) and the coil of the AC contactor 4 via the air switch K1.

[0072] Preferably, the air switch K1 is used to provide overload protection and short circuit protection. When the circuit current exceeds the rated value (such as when the equipment is overloaded), the air switch K1 automatically cuts off the power supply to prevent the line from overheating and causing a fire or equipment damage. When a short circuit is detected (such as poor line contact or internal equipment fault), the air switch K1 trips quickly to prevent the current from surging and causing damage to the device.

[0073] Preferably, in this embodiment, the first measuring device 5 is an AC voltmeter used to measure and display the voltage value before the input three-phase rectifier bridge 91; specifically, a 6L2 type pointer AC voltmeter with a range of 500V is used.

[0074] The closing device 3 is connected to the AC contactor 4.

[0075] Preferably, the closing / disconnecting device 3 includes: a closing button AN1 and a disconnecting button AN2;

[0076] One end of the cut-off button AN2 is connected to the neutral wire (N) of the 220V power interface through the coil KM in the AC contactor 4;

[0077] The other end of the off button AN2 is connected to one end of the on button AN1;

[0078] The other end of the button AN1 is connected to the live wire (L1) of the 220V power interface;

[0079] The normally open auxiliary contact KM-1 of AC contactor 4 is connected in parallel across the two ends of button AN1.

[0080] Preferably, in this embodiment, both the "close" button AN1 and the "close" button AN2 are self-resetting buttons, with the "close" button AN1 remaining in a normally open state and the "close" button AN2 remaining in a normally closed state.

[0081] Preferably, the "close" button AN1 and the "close" button AN2 are connected to the AC contactor 4. Pressing the "close" button AN1 energizes the AC contactor 4, causing its normally open auxiliary contact KM-1 to close and self-hold, keeping the contactor 4 continuously energized. The main contact KM2 closes, allowing AC power to be supplied to the power module. Pressing the "close" button AN2 de-energizes the AC contactor 4, causing the normally open auxiliary contact KM-1 and the main contact KM2 to open, thus disconnecting the AC power supply to the power module. The "close" button AN1 and the "close" button AN2 enable rapid connection and disconnection control of the main circuit (380V line). In case of abnormalities during testing, the main circuit power can be quickly disconnected, ensuring the safety of the power module under test and the operators.

[0082] The three-phase rectifier bridge 91 is connected to the second measuring device 6 and the IGBT module 92 in the power module, respectively.

[0083] Preferably, the second measuring device 6 is a 6L2 type pointer DC voltmeter with a range of 600V, used to measure and display the voltage value output by the three-phase rectifier bridge 91.

[0084] Preferred, such as Figure 3 As shown, the power module 9 contains a three-phase rectifier bridge and an IGBT module (insulated gate bipolar transistor). This utility model mainly detects the working status of the three-phase rectifier bridge 91 and the IGBT module 92 in the power module 9. The IGBT module 92 includes BG1 and BG2.

[0085] Preferably, the upper end of the air switch K1 is connected to a 380V AC current, and the lower end lead is connected to the input terminal of the voltage regulator 2 (the voltage regulator is marked).

[0086] The output terminal of voltage regulator 2 (marked on the voltage regulator) is connected to the upper end of the main contact KM-2 of contactor 4;

[0087] The lower end of the main contact KM-2 of AC contactor 4 is connected to the power terminals E1 to E3 of the power module to be tested;

[0088] The terminals E6 and E7 of the power module are shorted together with a short wire with alligator clips at both ends;

[0089] The two leads of the first measuring device 5 are respectively connected to the lower end of the main contact KM-2 of the AC contactor 4 (any two of them);

[0090] The "+" and "-" terminals of the second measuring device 6 are respectively connected to terminals E7 and E5;

[0091] The "+" terminal of the third measuring device 7 is connected to terminal E4, the "-" terminal is connected to one end of the dummy load, and the other end of the dummy load is connected to terminal E5.

[0092] One end of the coil KM of AC contactor 4 is connected to the neutral wire (N) of the 220V power interface, and the other end is connected to one end of the cut-off button AN2;

[0093] The other end of the off button AN2 is connected to one end of the on button AN1;

[0094] The other end of the button AN1 is connected to the live wire (L1) of the 220V power interface;

[0095] The two ends of the normally open auxiliary contact KM-1 are connected in parallel with the two ends of the closing button AN1.

[0096] Preferably, the three-phase AC power supply of AC contactor 4 is introduced into the three terminals E1, E2, and E3;

[0097] The three terminals E1, E2, and E3 are connected to the three-phase rectifier bridge via BX1-BX3 (15A fuses);

[0098] Varistors CR1, CR2, and CR3 are connected across each pair of power phases;

[0099] The E6 and E7 terminals connect to the choke coil (external);

[0100] Resistor R1, LED DS1, and resistor R2 are connected in series and then connected between terminal E7 and terminal E5.

[0101] Resistor R3 and capacitor C1 are connected in parallel, resistor R4 and capacitor C2 are connected in parallel, and then the two are connected in series between terminals E7 and E5.

[0102] Capacitor C3 is connected between terminal E7 and terminal E5;

[0103] Diodes CR4 and CR6, and resistor R5 are connected in parallel between the gate and emitter of BG1, and are also connected in parallel within the "BG1 control" of the power switch controller.

[0104] Diodes CR5 and CR7, and resistor R6 are connected in parallel between the gate and emitter of BG2, and are also connected in parallel within the "BG2 control" of the power switch controller;

[0105] The emitter of BG2 is connected to terminal E4 via resistor R7; the collector of BG1 is connected to terminal E7.

[0106] Diode D1 is connected between terminal E4 and terminal E5;

[0107] Resistor R8, LED DS2, and resistor R9 are connected in series to terminals E4 and E5;

[0108] One end of the optical fiber is connected to the "BG1 control" of the power switch controller; the other end of the optical fiber is connected to the "BG2 control" of the power switch controller.

[0109] "BG1 control" transmits the closing command of BG2 and simultaneously receives the status detection signal of BG2;

[0110] The "BG2 control" receives the closing command from BG1 and simultaneously transmits the status detection signal of BG2.

[0111] Three-phase power supply fuse BX2 is connected to one end of the primary winding of transformer B1 through fuse BX4 and resistor R12;

[0112] Three-phase power supply fuse BX3 is connected to the other end of the primary winding of transformer B2 through fuse BX5 and resistor R13.

[0113] The secondary winding of transformer B1 is connected to the power switch controller to supply power to "BG1 control";

[0114] The secondary winding of transformer B2 is connected to the power switch controller to supply power to "BG2 control";

[0115] The power switch controller is a part of the power module.

[0116] The IGBT module 92 is connected via the third measuring device 7 and the dummy load 8.

[0117] Preferably, the third measuring device 7 is a 6C2 type pointer DC ammeter with a range of 20A, used to measure and display the current value output by the IGBT module.

[0118] Preferably, the dummy load 8 is a high-power corrugated wire wound load resistor that can safely dissipate 4000 watts of power at a resistance of 100 ohms, and is used to dissipate the power generated by the power module 9 under test.

[0119] Preferred, such as Figures 4-5 As shown, it also includes: an operating console 10;

[0120] The operating table 10 includes: a support 101, a tabletop 102, a back panel 103, a first side panel 104, and a second side panel 105;

[0121] The tabletop 102 is horizontally positioned at the top of the bracket 101;

[0122] The back plate 103 is located behind the bracket 101 and is fixedly connected to the upper surface of the tabletop 102;

[0123] The first side plate 104 and the second side plate 105 are respectively disposed on both sides of the bracket 101, and are both fixedly connected to the lower surface of the table 102.

[0124] Preferably, in this embodiment, the back plate 103 is vertically connected to the upper surface of the tabletop 102; the first side plate 104 and the second side plate 105 are both vertically connected to the lower surface of the tabletop 102.

[0125] Preferably, the first measuring device 5, the second measuring device 6, and the third measuring device 7 are all mounted on the back plate;

[0126] The on / off button AN1, the off button AN2, and the power module 4 are mounted on the tabletop 102;

[0127] Air switch K1 and AC contactor 4 are mounted on the first side plate 104;

[0128] The dummy load 8 is set on the second side plate 105.

[0129] Preferably, the countertop 102 is provided with anti-static rubber;

[0130] The bracket 101, tabletop 102, back panel 103, first side panel 104, and second side panel 105 are all made of aluminum alloy.

[0131] Preferably, the voltage regulator 2 is installed on the ground, and both the control panel 10 and the voltage regulator 2 are grounded.

[0132] Preferably, the operating table 10 is made of metal and grounded to ensure personal safety. Insulating rubber is installed on the table surface 102 of the operating table 10 before the power module is placed to ensure the safety of the power module under test.

[0133] Preferably, the power supply unit 1, the DC ammeter and the dummy load 8 use 6 square millimeter cables; the 220V circuit devices (close button AN1, open button AN2, normally open auxiliary contact KM-1 and coil KM of AC contactor 4), the AC voltmeter and the DC voltmeter are connected using 0.5 square millimeter cables.

[0134] Example 3

[0135] The working principle of this utility model:

[0136] Three-phase rectifier bridge 91 fault detection principle:

[0137] Connect the power module 4 to be tested to the PSM shortwave radio transmitter power module test device. Close the air switch K1 and simultaneously close the button AN1. The coil KM of the AC contactor 4 is energized. The magnetic field generated by the coil KM attracts the moving iron core and drives the normally open auxiliary contact KM-1 to close, so that the coil KM of the AC contactor 4 is always energized. At the same time, it drives the main contact KM2 to close, and the voltage regulator 2 is adjusted to gradually increase the voltage. At the same time, read the voltage value x1 of the AC voltmeter and the voltage value x2 of the DC voltmeter. x1 is the voltage value before rectification by the three-phase rectifier bridge 91, and x2 is the voltage value after rectification by the three-phase rectifier bridge 91. Compare the magnitudes of x1 and x2. If x2 is 1.4 times x1, it means that the three-phase rectifier bridge 91 is normal; otherwise, the three-phase rectifier bridge 91 is faulty. For convenient testing, the voltage is increased so that the reading of the first measuring device 5 is an integer of 100V.

[0138] IGBT module 92 fault detection principle:

[0139] When the three-phase rectifier bridge 91 is normal, continue to adjust the voltage regulator 2 to boost the voltage to 380V, disconnect the disconnect button AN2, and the voltage regulator does not return to its normal position to simulate the working voltage value of the power module, and carry out the test on the IGBT module 92.

[0140] Static testing:

[0141] Press the AN1 button to power on the power module. Read the reading of the third measuring device 7 to detect the static characteristics of the IGBT module 92. When the IGBT module 92 is not connected to the optical fiber, the optical fiber signal of BG2 should be in the off state if it does not receive the AN1 command. If the third measuring device 7 has a reading, it indicates that BG2 is short-circuited and the IGBT module 92 is faulty.

[0142] After the static testing of the third measuring device 7 yields no reading, the dynamic testing of the IGBT module 92 is then performed:

[0143] When the optical fiber in the IGBT module 92 is looped, under normal circumstances, when BG2 receives the high-frequency on / off command optical fiber signal, it is in a high-frequency switching state, and the reading of the third measuring device 7 is relatively stable (the pointer of the mechanical pointer DC ammeter will not swing due to the damping effect); if the reading of the third measuring device 7 is 0, it indicates that BG1 is open or BG2 has an open circuit (or short circuit) fault (at this time, the abnormal optical fiber signal of BG2 status detection causes BG1 to turn off), and the IGBT module 92 is faulty.

[0144] If the third measuring device 7 has a reading, it indicates that BG2 is normal. At this time, disconnect one end of the loop fiber. No normal fiber signal is sent to BG2, causing BG1 to turn off and lock in this state. When the loop fiber is plugged back in, the DC ammeter reading remains unchanged, indicating that BG1 is short-circuited and IGBT module 92 is faulty.

[0145] When a fault is detected in power module 4, or when an abnormal situation such as arcing occurs during the test, or after the test operation is completed, press the disconnect button AN2 to de-energize the coil KM of AC contactor 4. The spring resets the normally open auxiliary contact KM-1, and the main contact KM2 opens, cutting off the AC power supply. The voltage regulator 2 returns to zero, the air switch K1 is disconnected, and the power module is discharged and then removed.

[0146] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a PSM shortwave broadcast transmitter power module testing device. This utility model adopts an offline testing method, which can perform online testing simulation of a single-stage power module at any time, without being limited by the broadcast time of the transmitter, and avoids the problem of low testing efficiency caused by repeated on-machine testing. By setting up a switching device, the power supply can be cut off in time if an abnormality occurs during the power module testing process, so as to avoid damage to the power module. The working voltage of the power module is gradually increased by adjusting the voltage regulator, which protects the device while simulating the working environment of the power module. The power module test platform is grounded and the test platform surface is equipped with insulating rubber. The power supply and disconnection of the power module can be quickly realized by controlling the switching of the AC contactor, thereby ensuring the safety of the power module under test and the operator. By plugging and unplugging the optical fiber of the power module and reading the reading of the measuring device, it is easy and quick to detect whether the power module is functioning normally and to quickly locate the fault part of the power module.

[0147] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0148] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A PSM short wave broadcast transmitter power module test apparatus, characterized by, include: Power supply unit, voltage regulator, switching device, AC contactor, first measuring device, second measuring device, third measuring device, and dummy load; The corresponding interfaces of the power supply unit are respectively connected to the voltage regulator and the AC contactor; The voltage regulator is connected to the first measuring device and the three-phase rectifier bridge in the power module to be tested via the AC contactor. The three-phase rectifier bridge is connected to the second measuring device and the IGBT module in the power module, respectively. The IGBT module is connected to the dummy load via the third measuring device; The AC contactor is connected to the corresponding interface of the power supply unit through the switching device.

2. The PSM short wave broadcast transmitter power module test apparatus of claim 1, wherein, The corresponding interfaces of the power supply unit include a 220V power interface and a 380V power interface. The 220V power interface is connected to the AC contactor and the switching device to form a control circuit connection. The 380V power interface is connected to the voltage regulator.

3. A PSM short wave broadcast transmitter power module test apparatus as claimed in claim 2, wherein, It also includes air switches; The 380V power interface and the 220V power interface are both connected to the voltage regulator and the AC contactor respectively through the air switch.

4. The PSM short wave broadcast transmitter power module test apparatus of claim 3, wherein, One end of the main contact of the AC contactor is connected to the output terminal of the voltage regulator; the other end of the main contact is connected to the first measuring device and the three-phase rectifier bridge respectively.

5. The PSM shortwave broadcast transmitter power module testing device according to claim 4, characterized in that, The closing / disconnecting device includes: a closing button and a disconnecting button; One end of the cut button is connected to the neutral wire of the 220V power interface through the coil in the AC contactor; The other end of the cut button is connected to one end of the close button; The other end of the button is connected to the live wire of the 220V power interface; The normally open auxiliary contact in the AC contactor is connected in parallel to both ends of the push button.

6. A PSM short wave broadcast transmitter power module test apparatus as claimed in claim 5, wherein, The first measuring device is an AC voltmeter; The second measuring device is a DC voltmeter; The third measuring device is a DC ammeter.

7. A PSM short wave broadcast transmitter power module test apparatus as claimed in claim 6, wherein, Also includes: Control panel; The operating table includes: a support, a tabletop, a back panel, a first side panel, and a second side panel; The platform is horizontally positioned at the top of the bracket; The back plate is located behind the bracket and is fixedly connected to the upper surface of the table. The first side plate and the second side plate are respectively disposed on both sides of the bracket, and both are fixedly connected to the lower surface of the table.

8. A PSM short wave broadcast transmitter power module test apparatus as claimed in claim 7, wherein, The AC voltmeter, the DC voltmeter, and the DC ammeter are all mounted on the back plate; The on / off button, the off button, and the power module are mounted on the table surface; The air switch and the AC contactor are mounted on the first side plate; The dummy load is set on the second side plate.

9. The PSM short wave broadcast transmitter power module test apparatus of claim 7, wherein, The platform is equipped with anti-static rubber. The bracket, the tabletop, the back plate, the first side plate, and the second side plate are all made of aluminum alloy.

10. The PSM short wave broadcast transmitter power module test apparatus of claim 1, wherein, The dummy load is a high-power corrugated wire wound load resistor.

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