All-in-one alternating current load device for testing single-phase inverter
By designing an all-in-one AC load device, the problem of single load type in inverter testing equipment is solved, enabling the simulation and parameter measurement of various load types of inverters, and meeting the testing needs under complex load conditions.
Patent Information
- Application Number
- CN202422870573.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-25
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-25
AI Technical Summary
The existing inverter testing equipment has an overly simplistic design for AC load devices, which cannot meet the testing requirements of various load types, especially the simulation of linear, nonlinear, and impulsive loads.
Design a multi-functional AC load device for testing single-phase inverters, including a load connection module, a combined load module, an impulse load module, and a short-circuit impulse module, which respectively realize resistive, capacitive, nonlinear, impulse, and short-circuit load functions, and are equipped with a power meter and current transformer for parameter measurement.
It enables simulation testing of inverters under various load types, including resistive, capacitive, nonlinear, and impulse loads, and can accurately obtain power and current parameters to meet testing requirements under complex load conditions.
Smart Images
Figure CN223611676U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to inverter field especially refers to a single -phase inverter test is with multi -in -one ac load device. BACKGROUND
[0002] When inverter and other switching power supply (on -vehicle inverter, uninterrupted power supply) are designed, need to use ac load device to test. With the gradually increasing test performance requirement of inverter and other switching power supply, the test equipment requirement of inverter is also improved accordingly, and then the equipment for the test of inverter and other switching power supply is uneven at present, and most of the traditional ac load device design is too single, and is basically resistive load, and the coverage is not high, and the load type encountered in the field application of inverter product is many, such as linear load, nonlinear load, impact load and the like.
[0003] In view of the existence of the above problems, it is necessary to study a single -phase inverter test is with multi -in -one ac load device, which can realize multiple load functions. UTILITY MODEL CONTENT
[0004] The utility model discloses a single -phase inverter test is with multi -in -one ac load device, which can realize multiple load functions.
[0005] In order to achieve the above purpose, the solution of the utility model is as follows:
[0006] A single -phase inverter test is with multi -in -one ac load device, which includes load access module and combined load module;Load access module has the fire line connection end and zero line connection end;Combined load module includes first ac contactor, switching unit, rectifier bridge, multiple resistive load units and multiple capacitive load units;The first input end and the second input end of the first ac contactor are connected with the fire line connection end and the zero line connection end of the load access module respectively;Switching unit includes first switching switch, second switching switch and protection resistance, the first end of the first switching switch and the first end of the second switching switch are connected with the first output end of the first ac contactor, the second end of the second switching switch is connected with the first end of the protection resistance, the second end of the first switching switch and the second end of the second switching switch are connected with the first ac input end of the rectifier bridge, and the second ac input end of the rectifier bridge is connected with the second output end of the first ac contactor;Resistive load unit includes series connection load resistance and resistance switch, and the two ends of resistive load unit are connected with the positive output end and the negative output end of rectifier bridge respectively;Capacitive load unit includes series connection load capacitor and capacitor switch, and the two ends of capacitive load unit are connected with the positive output end and the negative output end of rectifier bridge respectively.
[0007] The single -phase inverter test is with multi -in -one ac load device also includes power meter;Power meter is connected with the fire line connection end and the zero line connection end of load access module.
[0008] The first end of the first switch and the first end of the second switch are connected to the first output end of the AC contactor through a mutual inductor.
[0009] The single-phase inverter test multi-in-one AC load device further comprises an impulse load module; the impulse load unit comprises a second AC contactor and at least one impulse load unit, the first input end and the second input end of the second AC contactor are connected to the live wire connection end and the zero line connection end of the load access module respectively, the impulse load unit comprises a tungsten iodine lamp and a point contact switch connected in series, and the two ends of the impulse load unit are connected to the first output end and the second output end of the second AC contactor respectively.
[0010] The single-phase inverter test multi-in-one AC load device further comprises a short-circuit impulse module; the short-circuit impulse module comprises a third AC contactor and a short-circuit wire, the first input end and the second input end of the third AC contactor are connected to the live wire connection end and the zero line connection end of the load access module respectively, and the two ends of the short-circuit wire are connected to the first output end and the second output end of the third AC contactor respectively.
[0011] The load access module comprises at least one access terminal, and the access terminal is connected to the live wire connection end and the zero line connection end respectively.
[0012] After the above scheme is adopted, the utility model has the following characteristics:
[0013] 1. The combined load module can realize the functions of resistive load, capacitive load and nonlinear load, and conveniently test the resistive load, capacitive load and nonlinear load of the inverter.
[0014] 2. The impulse load module can realize the function of impulse load, and conveniently test the impulse load of the inverter.
[0015] 3. The short-circuit impulse module can realize the function of short-circuit, and conveniently test the short-circuit impulse of the inverter.
[0016] 4. The power meter and the mutual inductor can conveniently obtain the power and current parameters, and then conveniently test and calculate. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the schematic diagram of the utility model.
[0018] Label explanation:
[0019] Load access module 1, access terminal 11,
[0020] Combined load module 2,
[0021] A first AC contactor 21,
[0022] A switching unit 22, a first switching switch 221, a second switching switch 222, and a protection resistor 223,
[0023] A rectifier bridge 23,
[0024] A resistive load unit 24, a load resistor 241, and a resistor switch 242,
[0025] A capacitive load unit 25, a load capacitor 251, and a capacitor switch 252,
[0026] A mutual inductor 26,
[0027] An impulse load module 3, a second AC contactor 31, an impulse load unit 32, an iodine tungsten lamp 321, and a point contact switch 322.
[0028] A short-circuit impulse module 4, a third AC contactor 41, and a short-circuit wire 42,
[0029] A power meter 5. DETAILED DESCRIPTION
[0030] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.
[0031] As Figure 1 shown, the utility model discloses a kind of single-phase inverter test with multi-in-one AC load device, it includes load access module 1, combination load module 2, impulse load module 3 and short-circuit impulse module 4;Wherein, combination load module 2 can realize the function of resistive load, capacitive load and nonlinear load, impulse load module 3 can realize the function of impulse load, and short-circuit impulse module 4 can realize short-circuit impulse function.
[0032] In the embodiment of the utility model, the load access module 1 has fire line connection end and zero line connection end, and load access module 1 includes at least one access terminal 11, and access terminal 11 is connected with fire line connection end and zero line connection end respectively, and access terminal 11 is used for connecting the inverter to be tested.
[0033] In the embodiment of the utility model, the combined load module 2 includes first AC contactor 21, switching unit 22, rectifier bridge 23, a plurality of resistive load units 24 and a plurality of capacitive load units 25;The first input end and the second input end of first AC contactor 21 are connected with the firewire connection end and the zero line connection end of load access module 1 respectively;Switching unit 22 includes first switching switch 221, second switching switch 222 and protection resistance 223, the first end of first switching switch 221 and the first end of second switching switch 222 are connected with the first output end of first AC contactor 21, the second end of second switching switch 222 is connected with the first end of protection resistance 223, the second end of first switching switch 221 and the second end of second switching switch 222 are connected with the first AC input end of rectifier bridge 23, the second AC input end of rectifier bridge 23 is connected with the second output end of first AC contactor 21;Resistive load unit 24 includes series-connected load resistance 241 and resistance switch 242, and the two ends of resistive load unit 24 are connected with the positive output end and the negative output end of rectifier bridge 23 respectively;Capacitive load unit 25 includes series-connected load capacitor 251 and capacitor switch 252, and the two ends of capacitive load unit 25 are connected with the positive output end and the negative output end of rectifier bridge 23 respectively.
[0034] The working principle of the combined load module 2 is as follows:
[0035] When the all-in-one AC load device for single-phase inverter test needs to be used as a resistive load, first AC contactor 21 and first switching switch 221 are closed, and the resistance switches 242 of the resistive load units 24 are selected to be closed according to the test needs, so that the AC power is rectified by rectifier bridge 23 and then input to the resistive load units 24 with closed resistance switches 242 to do work.
[0036] When the all-in-one AC load device for single-phase inverter test needs to be used as a capacitive load, first AC contactor 21 and first switching switch 221 are closed, and the capacitor switches 252 of the capacitive load units 25 are selected to be closed according to the test needs, so that the AC power is rectified by rectifier bridge 23 and then input to the capacitive load units 25 with closed capacitor switches 252 to do work.
[0037] When the single-phase inverter test all-in-one AC load device needs to be used as a nonlinear load, the first AC contactor 21 and the second switching switch 222 are closed, and the resistance switch 242 of each resistive load unit 24 is selected to be closed according to test needs, and the capacitance switch 252 of each capacitive load unit 25 is selected to be closed according to test needs, so that the AC power is input to the resistive load unit 24 with the closed resistance switch 242 and the capacitive load unit 25 with the closed capacitance switch 252 to do work; wherein, by the use of each resistive load unit 24 and each capacitive load unit 25, the utility model can realize the change of PF between 0.7~1; and the protection resistor 223 can play a buffering protection role to prevent the load capacitor 251 from being damaged by overvoltage in the power-on and power-off moments.
[0038] In the embodiment of the utility model, the first end of the first switching switch 221 and the first end of the second switching switch 222 are connected with the first output end of the AC contactor through the mutual inductor 26; in this way, the main circuit current of the combined load module 2 can be obtained through the mutual inductor 26, which is convenient for subsequent test calculation. In addition, the single-phase inverter test all-in-one AC load device of the utility model can further include a power meter 5; the power meter 5 is connected with the firewire connection end and the zero line connection end of the load access module 1, and the power meter 5 can obtain the power of the entire single-phase inverter test all-in-one AC load device, which is convenient for subsequent test calculation.
[0039] In the embodiment of the utility model, the impact load unit 32 includes the second AC contactor 31 and at least one impact load unit 32, the first input end and the second input end of the second AC contactor 31 are connected with the firewire connection end and the zero line connection end of the load access module 1 respectively, the impact load unit 32 includes the iodine tungsten lamp 321 and the point contact switch 322 in series, and the two ends of the impact load unit 32 are connected with the first output end and the second output end of the second AC contactor 31 respectively.
[0040] The working principle of the impact load unit 32 is as follows: when the single-phase inverter test all-in-one AC load device of the utility model needs to be used as an impact load, the second AC contactor 31 is closed, and the point contact switch 322 of the impact load unit 32 is controlled to be repeatedly turned on and off, so that the tested inverter is subjected to the load impact of the iodine tungsten lamp 321.
[0041] In the embodiment of the utility model, the short-circuit impact module 4 includes the third AC contactor 41 and the short-circuit wire 42, the first input end and the second input end of the third AC contactor 41 are connected with the firewire connection end and the zero line connection end of the load access module 1 respectively, and the two ends of the short-circuit wire 42 are connected with the first output end and the second output end of the third AC contactor 41 respectively.
[0042] The working principle of the short-circuit impact module 4 is that when the all-in-one alternating current load device for single-phase inverter test needs to be used for short-circuit impact of the inverter, the second alternating current contactor 31 is controlled to be turned on, the output of the inverter is short-circuited, and the inverter is subjected to the short-circuit impact.
[0043] The above embodiments and drawings are not limited to the product shape and style of the utility model, and any ordinary skilled person in the art can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.
Claims
1. A multi-in-one AC load device for single-phase inverter testing, characterized in that: The load access module and the combined load module are included. The load access module has a live connection end and a neutral connection end. The combined load module includes a first AC contactor, a switching unit, a rectifier bridge, a plurality of resistive load units, and a plurality of capacitive load units; the first input end and the second input end of the first AC contactor are connected to the live connection end and the neutral connection end of the load access module respectively; the switching unit includes a first switching switch, a second switching switch, and a protection resistor; the first end of the first switching switch and the first end of the second switching switch are connected to the first output end of the first AC contactor; the second end of the second switching switch is connected to the first end of the protection resistor; the second end of the first switching switch and the second end of the second switching switch are connected to the first AC input end of the rectifier bridge; the second AC input end of the rectifier bridge is connected to the second output end of the first AC contactor; the resistive load unit includes a load resistor and a resistance switch connected in series; the two ends of the resistive load unit are connected to the positive output end and the negative output end of the rectifier bridge respectively; the capacitive load unit includes a load capacitor and a capacitance switch connected in series; the two ends of the capacitive load unit are connected to the positive output end and the negative output end of the rectifier bridge respectively.
2. The all-in-one AC load device for single-phase inverter testing of claim 1, wherein: The power meter is further included; the power meter is connected to the live connection end and the neutral connection end of the load access module.
3. The all-in-one AC load device for single-phase inverter test of claim 1 or 2, wherein: The first end of the first switching switch and the first end of the second switching switch are connected to the first output end of the AC contactor through a mutual inductor.
4. The all-in-one AC load device for single-phase inverter testing of claim 1, wherein: The impact load module is further included. The impact load unit includes a second AC contactor and at least one impact load unit; the first input end and the second input end of the second AC contactor are connected to the live connection end and the neutral connection end of the load access module respectively; the impact load unit includes an iodine tungsten lamp and a point contact switch connected in series; the two ends of the impact load unit are connected to the first output end and the second output end of the second AC contactor respectively.
5. The all-in-one AC load device for single-phase inverter testing of claim 1, wherein: The short-circuit impact module is further included. The short-circuit impact module includes a third AC contactor and a short-circuit wire; the first input end and the second input end of the third AC contactor are connected to the live connection end and the neutral connection end of the load access module respectively; the two ends of the short-circuit wire are connected to the first output end and the second output end of the third AC contactor respectively.
6. The all-in-one AC load device for single-phase inverter testing of claim 1, wherein: The load access module includes at least one access terminal; the access terminal is connected to the live connection end and the neutral connection end respectively.