Silicon rectification charger output voltage test device

Abstract

The utility model discloses a silicon rectification charger output voltage test device, which comprises a test bench trolley and a test support arranged on the top of the test bench trolley, an alternating current motor fixing seat and a charger fixing seat to be tested are arranged on the table top of the test support, and a silicon rectification charger to be tested is installed on the charger fixing seat to be tested; a three-phase alternating-current motor is mounted on the alternating-current motor fixing seat and is in transmission connection with the silicon rectification charger to be tested through a belt; the top of the test bench trolley is also provided with an electrical control box, the electrical control box is electrically connected with the three-phase AC motor and the silicon rectification charger to be tested, the test bench trolley is internally provided with a storage battery, and the storage battery is electrically connected with the silicon rectification charger to be tested.

Description

Technical Field

[0001] The utility model relates to the technical field of charger testing, in particular to a silicon rectifier charger output voltage testing device. Background Art

[0002] The silicon rectifier charger is a core component of the KTA19 diesel engine. It primarily consists of fan blades, a rotor assembly, a stator assembly, a field coil, a bridge assembly, an excitation half-bridge, metal oxide film resistors, a regulator, and capacitors. The silicon rectifier charger is the primary power source for the KTA19 diesel engine. Its function is to supply power to the engine's electrical devices and sensors during normal engine operation (above idle speed), while also charging the battery. The silicon rectifier charger is a separately excited generator. During engine startup, the battery is required to supply the generator's magnetic field current, generating electricity for the engine's sensors and ensuring stable engine operation.

[0003] Due to a lack of dedicated maintenance and testing equipment, faulty diesel engine silicon rectifier chargers primarily rely on replacement parts for repair, increasing maintenance costs. Without appropriate testing equipment, faults in the silicon rectifier chargers cannot be detected early, leading to repairs, delayed delivery of air-conditioning generator vehicles, and production halts. Furthermore, even if repairable parts are available, they must be replaced on actual vehicles for testing and inspection, taking up additional time from the maintenance of section-repaired passenger car parts. Therefore, a device capable of testing silicon rectifier chargers is needed.

[0004] Among existing charger testing devices, Chinese utility model patent CN200920090021.1 discloses a test device for an automotive silicon rectifier generator and regulator. A silicon rectifier generator is mounted on a workbench, and a speed-regulating motor is mounted below the workbench. The speed-regulating motor and silicon rectifier generator are connected by a transmission mechanism. The speed-regulating motor controller is connected to the speed-regulating motor via wires, and the regulator is connected to the silicon rectifier generator via wires. This patent controls the speed-regulating motor at different speeds. When the generator outputs current at a certain speed, the output current at the corresponding speed is measured to determine the output power. The quality of the regulator is then assessed based on various technical parameters. This patent also suffers from the following issues: 1. The test results are not intuitive; the output power must be calculated based on the output current. 2. The measured output current is instantaneous, resulting in randomness and inaccuracy. 3. The transmission structure lacks protective measures. Mechanical anomalies in the speed-regulating motor or generator during rotation can easily cause personal injury to personnel. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a silicon rectifier charger output voltage test device.

[0006] The utility model is achieved through the following technical solutions:

[0007] Silicon rectifier charger output voltage test device, including:

[0008] Test bench trolley (1);

[0009] A test bracket (2) is arranged on the top of the test bench trolley (1); an AC motor fixing seat (21) and a charger fixing seat (22) to be tested are arranged on the table of the test bracket (2); and the silicon rectifier charger (8) to be tested is installed and fixed on the charger fixing seat (22);

[0010] A three-phase AC motor (3) is mounted and fixed on an AC motor fixing seat (21) and is connected to a silicon rectifier charger (8) to be tested via a belt transmission mechanism (6) for driving the silicon rectifier charger (8) to be tested to rotate;

[0011] An electrical control box (4) is arranged on the top of the test bench trolley (1) on one side of the test bracket (2) and is used to control the operation of the three-phase AC motor (3) and the silicon rectifier charger (8) to be tested;

[0012] The battery (5) is arranged in the test bench trolley (1) and is electrically connected to the silicon rectifier charger (8) to be tested. It is used to supply power when the silicon rectifier charger (8) is started and to charge the battery (5) when the silicon rectifier charger (8) is in stable operation.

[0013] Furthermore, the charger to be tested fixing seat (22) comprises:

[0014] An articulated seat (221) is arranged on the table of the test bracket (2), and two mounting seats below the silicon rectifier charger (8) to be tested are hinged on the articulated seat (221);

[0015] A positioning rod (222) is vertically arranged on the table of the test stand (2), and a positioning hole (223) is provided on the positioning rod (222);

[0016] One end of the adjusting screw (224) is hinged on the mounting base above the silicon rectifier charger (8) to be tested, and the other end passes through the positioning hole (223) on the positioning rod (222) and is fixed by a butterfly nut.

[0017] Furthermore, the electrical control box (4) is provided with an AC circuit (41) for controlling the three-phase AC motor (3) and a DC circuit (42) for controlling the silicon rectifier charger (8) to be tested.

[0018] Furthermore, the main circuit of the AC circuit (41) adopts an AC380V three-phase plug input, and a 15A fuse is installed at the U / V / W phase at the front end, and then a 3P25A air switch Q1 is used as the switch of the main power supply, and is connected to the input end of the contactor KM1 after passing through the motor protector JD5, and the output end of KM1 is then connected to the three-phase AC motor (3);

[0019] The U-phase power supply is connected to the power indicator light HL1 in parallel after passing through the air switch Q2. The U-phase is connected to the input end of the normally open contact of KM1 through the stop button AQ. The two ends of the normally open contact of KM1 are connected in parallel with the start button AT. The U-phase power supply is connected to the KM1 coil after passing through the output end of the normally open contact of KM1. The output end of the KM1 coil is connected to the motor protector. The two ends of the KM1 coil are connected in parallel with the working indicator light HL2.

[0020] The working power supply of the motor protector JD5 is connected in parallel with the V phase of the power indicator light HL1 and the normally open contact output terminal of KM1 respectively. An air switch Q2 is provided on the circuit between the power indicator light HL1 and the V phase power supply.

[0021] Furthermore, the DC circuit (42) includes:

[0022] Air switch Q4, the input end of which is connected to the battery (5), and the output end of which is connected to the silicon rectifier charger (8) to be tested;

[0023] A charge and discharge ammeter (421) is externally connected to a 75mV shunt, which is connected in series to the connection circuit between the battery (5) and the silicon rectifier charger (8);

[0024] A DC voltmeter (422) is connected in parallel to the connection circuit between the battery (5) and the silicon rectifier charger (8);

[0025] An overvoltage and undervoltage detection module (423) is connected in parallel to the connection circuit between the storage battery (5) and the silicon rectifier charger (8);

[0026] The buzzer (424) is electrically connected to the over-voltage and under-voltage detection module (423).

[0027] Furthermore, the top surface of the electrical control box (4) is provided with an openable and closable box door; the stop button AQ, the start button AT, the power indicator light HL1, the working indicator light HL2, the charge and discharge ammeter (421) and the DC voltmeter (422) are arranged on the box door on the top surface of the electrical control box (4); the motor protector JD5, the air switches Q1, Q2, Q3, Q4 and the contactor KM1 are arranged in the electrical control box (4); and the overvoltage and undervoltage detection module (423) and the buzzer (424) are arranged in front of the electrical control box (4).

[0028] Furthermore, the undervoltage detection range of the overvoltage and undervoltage detection module (423) is lower than DC26V, and the overvoltage detection range is higher than DC28.9V.

[0029] Furthermore, a transparent protective cover (7) is provided above the three-phase AC motor (3) and the silicon rectifier charger (8) to be tested, and the length and width dimensions thereof are adapted to the outer dimensions of the test bracket (2); a ventilation hole (71) is provided above the transparent protective cover (7), and handles (72) are provided on both sides of the transparent protective cover (7);

[0030] The transparent protective cover (7) is preferably made of acrylic material.

[0031] Furthermore, a battery storage compartment (11) is provided on one side of the test bench trolley (1), an insulating rubber is pasted on the inner wall of the battery storage compartment (11), and the battery (5) is placed in the battery storage compartment (11); and a plurality of layers of article storage compartments (12) are provided on the other side.

[0032] Furthermore, pulleys (61) of different sizes are installed at both ends of the rotor bearing of the three-phase AC motor (3) for testing two different types of silicon rectifier chargers (8).

[0033] The working principle of this utility model:

[0034] The utility model simulates the working state of a silicon rectifier charger (8) to perform a maintenance test on the silicon rectifier charger. A three-phase AC motor (3) is used to drive the silicon rectifier charger (8) to rotate stably at 1800 rpm, so that the silicon rectifier charger (8) stably outputs a DC26-28.9V voltage. The output voltage of the silicon rectifier charger (8) is detected in real time by an overvoltage and undervoltage detection control module (423). When the output voltage is lower than DC26V or higher than DC28.9V, a buzzer (424) sounds an alarm, prompting maintenance personnel to further confirm whether the silicon rectifier charger is qualified.

[0035] When testing a silicon rectifier charger (8), the two mounting bases below the silicon rectifier charger (8) to be tested are hingedly mounted on the hinged base (221) of the charger fixing base (22) to be tested, and then the hinged end of the adjusting screw (224) is hingedly mounted on the mounting base above the silicon rectifier charger (8). The threaded end of the adjusting screw (224) passes through the positioning hole (223) on the positioning rod (222), and a butterfly nut is screwed on for pre-fixation. Then, the belt (62) is sleeved on the pulleys (61) of the silicon rectifier charger (8) and the three-phase AC motor (3), and the belt (62) is tightened by tightening the butterfly nut, and then the wires of the silicon rectifier charger 8 are connected. After the silicon rectifier charger (8) is installed, a transparent protective cover (7) is placed on the three-phase AC motor (3) and the silicon rectifier charger (8), and the transparent protective cover (7) is fixed on the test bracket (2). After checking that all parts are in good condition, plug the AC three-phase plug of the electrical control box (4) into the 380V three-phase power socket in the workshop, turn on the AC circuit (41) control circuit air switches Q2 and Q3, the DC circuit (42) air switch Q4, and the AC circuit (41) main circuit air switch Q1 respectively, press the start button AT, the three-phase AC motor (3) starts, and drives the silicon rectifier charger (8) to operate. Then check the voltage values of the DC voltmeter (422) and the over-voltage and under-voltage detection module (423) to see if they are within the range of DC26-DC28.9V. If the voltage is within the normal range, let it operate continuously for 30 minutes. If the buzzer (424) does not alarm during the operation, the silicon rectifier charger (8) is qualified. If the buzzer (424) alarms, the silicon rectifier charger (8) is unqualified. After the test is completed, press the stop button AQ, the three-phase AC motor (3) stops running, turn off the four air switches Q1-Q4, and unplug the power supply.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] The silicon rectifier charger (8) test bench of the utility model solves the problem that the silicon rectifier charger (8) has no test fixtures, and the test method is simple, safe and reliable.

[0038] The working state of the silicon rectifier charger (8) is simulated by a test bench trolley (1), and the three-phase AC motor (3) is used to drive the silicon rectifier charger (8) to operate stably and output voltage, thereby realizing a ground test of the silicon rectifier charger (8). The electrical control box (4) is used to perform a test to realize a functional test of the silicon rectifier charger (8). The test can ensure that the silicon rectifier charger (8) is well installed and qualified for inspection.

[0039] The overvoltage and undervoltage detection module (423) in the utility model can safely and effectively monitor the output voltage state of the silicon rectifier charger (8). When the output voltage deviates, the buzzer (424) alarms, providing an effective detection means and fault judgment standard for maintenance, thereby realizing secondary repair and utilization of the charger.

[0040] The silicon rectifier charger (8) can adjust the tightness of the belt (62) driving the three-phase AC motor (3) by adjusting the screw (224), thereby ensuring smooth transmission between the three-phase AC motor (3) and the silicon rectifier charger (8), and also facilitating the installation and removal of the silicon rectifier charger (8).

[0041] The battery storage compartment (11) on the test bench trolley (1) allows the storage battery (5) to be installed in an independent space. The storage battery (5) is a flammable and explosive item. The battery storage compartment (11) protects the storage battery (5) from damage by external forces while also protecting the personal safety of the operator. The item storage compartment (12) on the test bench trolley (1) is convenient for storing items such as tools, connecting wires, and silicon rectifier chargers (8) to be repaired and qualified products. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is one of the three-dimensional structural diagrams of the present utility model;

[0043] Figure 2 This is the second schematic diagram of the three-dimensional structure of the utility model;

[0044] Figure 3 This is a schematic diagram of the tension adjustment of the transmission belt of the three-phase AC motor and silicon rectifier charger of the utility model;

[0045] Figure 4 This is a schematic diagram of the structure of the test bracket of the utility model;

[0046] Figure 5 This is a structural diagram of the electrical control box of the utility model;

[0047] Figure 6 This is a circuit diagram of the utility model.

[0048] Numbers in the figure:

[0049] 1-test bench trolley, 11-battery storage compartment, 12-item storage compartment;

[0050] 2-test bracket, 21-AC motor fixing seat, 22-test charger fixing seat, 221-hinge seat, 222-positioning rod, 223-positioning hole, 224-adjusting screw;

[0051] 3-Three-phase AC motor;

[0052] 4-Electrical control box, 41-AC circuit, 42-DC circuit, 421-Charge and discharge ammeter, 422-DC voltmeter, 423-Overvoltage and undervoltage detection module, 424-Buzzer;

[0053] 5-Battery;

[0054] 6-belt transmission mechanism, 61-pulley, 62-belt;

[0055] 7-transparent protective cover, 71-ventilation hole, 72-handle;

[0056] 8-Silicon rectifier charger.

[0057] Air switch-Q1, Q2, Q3, Q4, motor protector-JD5, contactor-KM1, stop button-AQ, start button-AT, power indicator light-HL1, working indicator light-HL2. DETAILED DESCRIPTION

[0058] In order to enable those skilled in the art to better understand the technical solution of the present invention, its specific implementation methods are described in detail below with reference to the accompanying drawings.

[0059] like Figure 1-6 As shown, the silicon rectifier charger output voltage test device includes a test bench trolley 1, a test bracket 2 is provided on the top of the test bench trolley 1, an AC motor fixing seat 21 and a charger fixing seat 22 to be tested are provided on the table of the test bracket 2, and the silicon rectifier charger 8 to be tested is installed and fixed on the charger fixing seat 22 to be tested; a three-phase AC motor 3 is installed and fixed on the AC motor fixing seat 21, and the three-phase AC motor 3 and the silicon rectifier charger 8 to be tested are connected through a belt transmission mechanism 6, an electrical control box 4 is provided on the top of the test bench trolley 1 on one side of the test bracket 2, and the electrical control box 4 is electrically connected to the three-phase AC motor 3 and the silicon rectifier charger 8 to be tested, and a battery 5 is provided in the test bench trolley 1, and the battery 5 is electrically connected to the silicon rectifier charger 8 to be tested.

[0060] In an embodiment, Figure 2 、 3 As shown in , 4 , the fixed seat 22 of the charger to be tested includes a hinged seat 221 arranged on the table of the test bracket 2, and the two mounting seats below the silicon rectifier charger 8 to be tested are hinged on the hinged seat 221; a positioning rod 222 is vertically arranged on the table of the test bracket 2, and a positioning hole 223 is provided on the positioning rod 222; an adjusting screw 224 is hinged on the mounting seat above the silicon rectifier charger 8 to be tested, and the other end of the adjusting screw 224 passes through the positioning hole 223 on the positioning rod 222 and is fixed by a butterfly nut.

[0061] The adjusting screw 224 is used to adjust the tightness of the belt 62 connecting the silicon rectifier charger 8 and the three-phase AC motor 3. Generally, after the belt tension is adjusted, it can be pressed by hand about 15mm to obtain the appropriate tightness. The butterfly nut is used to fix the position of the adjusting screw 224 after adjustment.

[0062] The installation gap between the silicon rectifier charger 8 and the hinge seat 221 does not exceed 5 mm, because the silicon rectifier charger 8 will vibrate during operation, so it is necessary to prevent the transmission of the belt transmission mechanism 6 from being affected by the installation gap being too large.

[0063] In an embodiment, Figure 5 、 6 As shown, the electrical control box 4 is provided with an AC circuit 41 for controlling the three-phase AC motor 3 and a DC circuit 42 for controlling the silicon rectifier charger 8 to be tested.

[0064] like Figure 6 As shown, the main circuit of the AC circuit 41 adopts AC380V three-phase plug input, and a 15A fuse is installed at the U / V / W phase at the front end. The 3P25A air switch Q1 is used as the switch of the main power supply, and is connected to the input end of the contactor KM1 after passing through the motor protector JD5, and the output end of KM1 is then connected to the three-phase AC motor 3.

[0065] The U-phase power supply is connected to the power indicator light HL1 in parallel after passing through the air switch Q2. The U-phase is connected to the normally open contact input end of KM1 through the stop button AQ. The two ends of the normally open contact of KM1 are connected to the start button AT in parallel. The U-phase power supply is connected to the KM1 coil after passing through the normally open contact output end of KM1. The output end of the KM1 coil is connected to the motor protector. The two ends of the KM1 coil are connected to the working indicator light HL2 in parallel.

[0066] The working power supply of the motor protector JD5 is connected in parallel with the V phase of the power indicator light HL1 and the normally open contact output terminal of KM1 respectively. An air switch Q2 is provided on the circuit between the power indicator light HL1 and the V phase power supply.

[0067] The silicon rectifier charger 8 is a separately excited generator. During engine starting, the battery 5 is required to supply the generator magnetic field current to generate magnetism. When the three-phase AC motor 3 drives the silicon rectifier charger 8 to rotate stably at 1800 rpm, the silicon rectifier charger 8 outputs stably and charges the battery 5. The battery 5 is composed of two 12V60AH batteries connected in parallel.

[0068] like Figure 6As shown, the battery 5 in the DC circuit 42 is connected to the silicon rectifier charger 8 to be tested after passing through the air switch Q4. A 75mv shunt is connected in series on the connection circuit between the battery 5 and the silicon rectifier charger 8. The shunt is electrically connected to a charge and discharge ammeter 421. A DC voltmeter 422 and an over- and under-voltage detection module 423 are connected in parallel on the connection circuit between the battery 5 and the silicon rectifier charger 8. The under-voltage detection module 423 is used to detect the voltage of the DC circuit 42. The under-voltage detection module 423 is electrically connected to a buzzer 424.

[0069] The undervoltage detection range of the over / undervoltage detection module 423 is below DC26V and the overvoltage detection range is above DC28.9V. When the output voltage of the silicon rectifier charger 8 is below DC26V or above DC28.9V, the control buzzer 424 is energized to alarm, prompting maintenance personnel to further confirm whether the silicon rectifier charger 8 is qualified.

[0070] In an embodiment, Figure 5 As shown, the top surface of the electrical control box 4 is provided with an openable door. The stop button AQ, start button AT, power indicator light HL1, working indicator light HL2, charge and discharge ammeter 421, and DC voltmeter 422 are installed on the top surface of the electrical control box 4. The motor protector JD5, air switches Q1, Q2, Q3, Q4, and contactor KM1 are installed in the electrical control box 4. The over-voltage and under-voltage detection module 423 and buzzer 424 are installed in front of the electrical control box 4. The over-voltage and under-voltage detection module 423 and buzzer 424 are installed and fixed to facilitate maintenance personnel to view the real-time voltage value of the over-voltage and under-voltage detection module and adjust the over-voltage and under-voltage detection set value. At the same time, the buzzer 424 is externally located, making it easier for maintenance personnel to hear the alarm sound.

[0071] The power indicator light HL1 and the working indicator light HL2 can intuitively display the circuit status, allowing workers to see it at a glance during operation, protecting both the equipment and the workers.

[0072] In an embodiment, Figure 1 As shown, a transparent protective cover 7 is provided above the three-phase AC motor 3 and the silicon rectifier charger 8 to be tested, and its length and width dimensions are adapted to the outer edge dimensions of the test bracket 2; a ventilation hole 71 is provided above the transparent protective cover 7, and handles 72 are provided on both sides of the transparent protective cover 7; the transparent protective cover 7 is made of a 10 mm thick transparent acrylic plate, which is light in weight and can be easily taken up by staff; the good transparency makes it convenient for staff to observe the working condition of the silicon rectifier charger 8 under test; the transparent protective cover 7 is placed properly during the test to prevent personal injury due to mechanical abnormalities during the rotation of the motor.

[0073] In an embodiment, Figure 1As shown, a battery storage compartment 11 is provided on one side of the test bench trolley 1, and an insulating rubber is pasted on the inner wall of the battery storage compartment 11, and the battery 5 is placed in the battery storage compartment 11; considering that the battery 5 is a flammable and explosive item, the battery 5 is placed in an independent space on the side of the test bench trolley 1, which can protect the battery 5 while also protecting the operating personnel.

[0074] A three-layer storage bin 12 is provided on the right side of the test bench trolley 1. The first layer can be used to store tools, the second layer can be used to store products to be repaired, and the third layer can be used to store qualified products.

[0075] Universal wheels can also be installed on the four corners of the bottom of the test bench trolley 1 to make the test bench trolley 1 movable, making it convenient for staff to move the position of the test bench trolley 1.

[0076] In an embodiment, Figure 2 As shown, pulleys 61 of different sizes are installed at both ends of the rotor bearing of the three-phase AC motor 3 for testing two different types of silicon rectifier chargers 8.

[0077] In the embodiment, the DC voltmeter 422 adopts a 69C9 pointer-type DC voltmeter, the charge and discharge ammeter 421 adopts a 69C9 DC ammeter, the three-phase AC motor 3 adopts an AC380V asynchronous motor, and the commonly used silicon rectifier charger 8 model is Cummins 3016627, 24V35A single-wire brushless generator.

[0078] Working mode of this utility model:

[0079] Step 1: The staff member opens the transparent protective cover 7 and hinges the two mounting brackets below the silicon rectifier charger 8 to the hinged bracket 221 of the charger mounting bracket 22. The staff member then hinges the hinged end of the adjusting screw 224 to the mounting bracket above the silicon rectifier charger 8. The threaded end of the adjusting screw 224 passes through the positioning hole 223 on the positioning rod 222 and is pre-secured with a butterfly nut. The staff member then attaches the belt 62 to the pulleys 61 of the silicon rectifier charger 8 and the three-phase AC motor 3. The belt 62 is tightened by tightening the butterfly nut. The wires of the silicon rectifier charger 8 are then connected.

[0080] Step 2: Cover the three-phase AC motor 3 and the silicon rectifier charger 8 with the transparent protective cover 7 , and fix the transparent protective cover 7 on the test bracket 2 .

[0081] Step 3: After checking that all parts are in good condition, plug the AC three-phase plug of the electrical control box 4 into the 380V three-phase power socket in the workshop, turn on the AC circuit 41 control circuit air switches Q2 and Q3, the DC circuit 42 air switch Q4, and the AC circuit 41 main circuit air switch Q1, press the start button AT, the three-phase AC motor 3 starts, and drives the silicon rectifier charger 8 to operate.

[0082] Step 4: Check the voltage values of the DC voltmeter 422 and the over-voltage / under-voltage detection module 423 to see if they are within the range of DC26-DC29V. If they are normal, run them continuously for 30 minutes. If there is no alarm, the silicon rectifier charger 8 is qualified. If there is an alarm, the silicon rectifier charger 8 is unqualified.

[0083] Step 5: After the test is completed, press the stop button AQ, the three-phase AC motor 3 stops running, turn off the four air switches, and unplug the power.

[0084] Step 6: Loosen the butterfly nut on the adjusting screw 224 to shorten the distance between the three-phase AC motor 3 and the silicon rectifier charger 8, then remove the transmission belt 62. Two staff members cooperate with each other to remove the connecting screw on the adjusting screw 224 and the hinged seat 221, remove the silicon rectifier charger 8, and place the qualified silicon rectifier charger 8 in the qualified product placement area; the unqualified silicon rectifier charger 8 is placed in the unqualified product placement area for further inspection of the unqualified silicon rectifier charger 8.

[0085] It should be noted that the above detailed introduction to the technical solution of the present invention and the description of the principles of the present invention are intended only to help understand the core concept of the present invention. It should be noted that those skilled in the art can improve and modify the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0086] Those skilled in the art of the present invention may modify or supplement the specific embodiments described, or adopt similar methods to replace them, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, and all such modifications and additions are within the scope of protection of the present invention. Therefore, the scope of protection of this utility model patent shall be based on the appended claims.

Claims

1. Silicon rectifier charger output voltage test device, characterized in that: include: Test bench trolley (1); A test bracket (2) is arranged on the top of the test bench trolley (1); an AC motor fixing seat (21) and a charger fixing seat (22) to be tested are arranged on the table of the test bracket (2); and the silicon rectifier charger (8) to be tested is installed and fixed on the charger fixing seat (22); A three-phase AC motor (3) is mounted and fixed on an AC motor fixing seat (21) and is connected to a silicon rectifier charger (8) to be tested via a belt transmission mechanism (6) for driving the silicon rectifier charger (8) to be tested to rotate; An electrical control box (4) is arranged on the top of the test bench trolley (1) on one side of the test bracket (2) and is used to control the operation of the three-phase AC motor (3) and the silicon rectifier charger (8) to be tested; The battery (5) is arranged in the test bench trolley (1) and is electrically connected to the silicon rectifier charger (8) to be tested. It is used to supply power when the silicon rectifier charger (8) is started and to charge the battery (5) when the silicon rectifier charger (8) is in stable operation.

2. The silicon rectifier charger output voltage test device according to claim 1, characterized in that: The charger to be tested fixing seat (22) comprises: An articulated seat (221) is arranged on the table of the test bracket (2), and two mounting seats below the silicon rectifier charger (8) to be tested are hinged on the articulated seat (221); A positioning rod (222) is vertically arranged on the table of the test stand (2), and a positioning hole (223) is provided on the positioning rod (222); One end of the adjusting screw (224) is hinged on the mounting base above the silicon rectifier charger (8) to be tested, and the other end passes through the positioning hole (223) on the positioning rod (222) and is fixed by a butterfly nut.

3. The silicon rectifier charger output voltage test device according to claim 1, characterized in that: The electrical control box (4) is provided with an AC circuit (41) for controlling a three-phase AC motor (3) and a DC circuit (42) for controlling a silicon rectifier charger (8) to be tested.

4. The silicon rectifier charger output voltage test device according to claim 3, characterized in that: The main circuit of the AC circuit (41) adopts an AC380V three-phase plug input, and a 15A fuse is installed at the U / V / W phase at the front end. Then, a 3P25A air switch Q1 is used as the switch of the main power supply. After passing through the motor protector JD5, it is connected to the input end of the contactor KM1, and the output end of KM1 is then connected to the three-phase AC motor (3); The U-phase power supply is connected to the power indicator light HL1 in parallel after passing through the air switch Q2. The U-phase is connected to the input end of the normally open contact of KM1 through the stop button AQ. The two ends of the normally open contact of KM1 are connected in parallel with the start button AT. The U-phase power supply is connected to the KM1 coil after passing through the output end of the normally open contact of KM1. The output end of the KM1 coil is connected to the motor protector. The two ends of the KM1 coil are connected in parallel with the working indicator light HL2. The working power supply of the motor protector JD5 is connected in parallel with the V phase of the power indicator light HL1 and the normally open contact output terminal of KM1 respectively. An air switch Q2 is provided on the circuit between the power indicator light HL1 and the V phase power supply.

5. The silicon rectifier charger output voltage test device according to claim 4, characterized in that: The DC circuit (42) comprises: Air switch Q4, the input end of which is connected to the battery (5), and the output end of which is connected to the silicon rectifier charger (8) to be tested; A charge and discharge ammeter (421) is externally connected to a 75mV shunt, which is connected in series to the connection circuit between the battery (5) and the silicon rectifier charger (8); A DC voltmeter (422) is connected in parallel to the connection circuit between the battery (5) and the silicon rectifier charger (8); An overvoltage and undervoltage detection module (423) is connected in parallel to the connection circuit between the storage battery (5) and the silicon rectifier charger (8); The buzzer (424) is electrically connected to the over-voltage and under-voltage detection module (423).

6. The silicon rectifier charger output voltage test device according to claim 5, characterized in that: The top surface of the electrical control box (4) is provided with an openable and closable box door; the stop button AQ, the start button AT, the power indicator light HL1, the working indicator light HL2, the charge and discharge ammeter (421) and the DC voltmeter (422) are arranged on the box door on the top surface of the electrical control box (4); the motor protector JD5, the air switches Q1, Q2, Q3, Q4 and the contactor KM1 are arranged in the electrical control box (4); the overvoltage and undervoltage detection module (423) and the buzzer (424) are arranged in front of the electrical control box (4).

7. The silicon rectifier charger output voltage test device according to claim 5, characterized in that: The undervoltage detection range of the overvoltage and undervoltage detection module (423) is lower than DC26V, and the overvoltage detection range is higher than DC28.9V.

8. The silicon rectifier charger output voltage test device according to claim 1, characterized in that: A transparent protective cover (7) is provided above the three-phase AC motor (3) and the silicon rectifier charger (8) to be tested, and the length and width dimensions thereof are adapted to the outer dimensions of the test bracket (2); a ventilation hole (71) is provided above the transparent protective cover (7), and handles (72) are provided on both sides of the transparent protective cover (7); The transparent protective cover (7) is made of acrylic material.

9. The silicon rectifier charger output voltage test device according to claim 1, characterized in that: The test bench trolley (1) is provided with a battery storage compartment (11) on one side, the inner wall of the battery storage compartment (11) is pasted with insulating rubber, and the battery (5) is placed in the battery storage compartment (11); and a plurality of layers of article storage compartments (12) are provided on the other side.

10. The silicon rectifier charger output voltage test device according to claim 1, characterized in that: Pulleys (61) of different sizes are installed at both ends of the rotor bearing of the three-phase AC motor (3) for testing two different types of silicon rectifier chargers (8).

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