Alternating current load matching test equipment

Abstract

The utility model discloses an AC load matching test device comprising a simulation load unit, a plurality of gear air switches, a bus fuse, a watt hour meter and a load total air switch. The simulation load unit comprises a plurality of loads; one end of each load is connected with one end of one gear air switch; the other ends of the plurality of loads are connected with one end of the bus fuse after converging and intersecting; the other end of the bus fuse is connected with a movable contact A of the load total air switch; the other ends of the plurality of gear air switches are connected with a movable contact B of the load total air switch after converging and intersecting; the watt-hour meter is connected in parallel with the load total air switch. A static contact C and a static contact D of the load total air switch are respectively connected with a zero line N terminal and a live line L terminal of the load socket. The alternating current load matching test equipment is scientific in design, can conveniently and reliably detect the working performance of an inverter, and has great practical significance.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to an AC load matching testing device. Background Art

[0002] With the development of technologies like smart homes and the Internet of Things, more and more devices require lithium batteries as power sources. These devices often need to convert the DC power provided by lithium batteries into AC power to drive various household appliances. Therefore, inverters, which are paired with lithium batteries to convert DC power to AC, are widely used in these fields. Currently, products combining lithium batteries and inverters include household power banks and outdoor mobile power supplies.

[0003] In order to meet people's demand for efficient and environmentally friendly energy and to master the working performance of the inverter, inverter manufacturers are currently in urgent need of developing a device that can help detect the working performance of the inverter.

[0004] It should be noted that the inverter's operating performance includes the inverter's main output electrical performance and the inverter's energy conversion efficiency. The inverter's main output electrical performance includes: rated voltage, rated frequency, real-time output current, and real-time output power. The inverter's energy conversion efficiency = (AC output power ÷ DC input power) * 100%. The inverter's energy conversion efficiency directly reflects the inverter's own energy loss. It should also be noted that the inverter's output current and output power change with load power adjustments, while its output voltage and output frequency remain unchanged and maintain the rated voltage and rated frequency. Utility Model Content

[0005] The purpose of the utility model is to provide an AC load matching test device in view of the technical defects in the prior art.

[0006] To this end, the utility model provides an AC load supporting test device, including a simulated load unit, multiple gear circuit breakers, a bus fuse, an electric meter and a load main circuit breaker;

[0007] A simulated load unit, including multiple loads;

[0008] One end of multiple loads is connected to one end of a gear switch respectively;

[0009] The other ends of the multiple loads are connected to one end of the bus fuse after the currents intersect;

[0010] The other end of the bus fuse is connected to the moving contact A of the load main circuit breaker;

[0011] The other ends of the multiple position circuit breakers are connected to the moving contact B of the load main circuit breaker after the currents converge and intersect;

[0012] The watt-hour meter is connected in parallel to the load main circuit breaker;

[0013] The static contact C and the static contact D of the load main circuit breaker are connected to the neutral wire N terminal and the live wire L terminal of the load socket respectively.

[0014] It can be seen from the technical solution provided by the above-mentioned utility model that, compared with the existing technology, the utility model provides an AC load supporting test equipment with a scientific design. By applying this equipment, it is conducive to conveniently and reliably detecting the working performance (such as the main output electrical performance and energy conversion efficiency) of the inverter (or other AC output equipment), which has great practical significance.

[0015] The utility model is scientifically designed and modularized, with multi-level adjustable loads to simulate various load power conditions in actual operations. The device is compact, easy to carry and move, and easy to operate, requiring no professional technicians to operate it, thus reducing the cost of use.

[0016] It should be noted that the AC load test equipment provided by this utility model is an instrument specifically designed for testing and evaluating the performance of electrical systems. Its primary function is to simulate an AC load under operating conditions and accurately measure the capacity, stability, and reliability of the electrical system. AC load test equipment plays a vital role in fields such as power systems, industrial automation, and electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An electrical schematic diagram of an AC load supporting test device provided by the utility model;

[0018] Figure 2 This is a schematic diagram of the appearance of an embodiment of an AC load supporting test device provided by the utility model;

[0019] In the figure, 1 is the box, 2 is the load socket, 3 is the load main circuit breaker, 4 is the bus fuse, and 5 is the energy meter;

[0020] 6 is the switch, 7 is the load, 8 is the power socket, 9 is the temperature controller, and 10 is the fan;

[0021] 90 is a temperature sensor and 11 is a socket switch. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0024] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0026] See also Figure 1 The utility model provides an AC load supporting test device, including a simulated load unit, a plurality of gear circuit breakers 6, a bus fuse 4, an electric meter 5 and a load main circuit breaker 3;

[0027] A simulated load unit, comprising a plurality of loads 7;

[0028] One end of the multiple loads 7 is connected to one end of a gear switch (i.e., an air switch with gears) 6, that is, one-to-one series connection;

[0029] The other ends of the multiple loads 7 are connected to one end of the bus fuse 4 after the currents are converged (i.e., parallel converged);

[0030] The other end of the bus fuse 4 is connected to the moving contact A of the load main circuit breaker 3;

[0031] The other ends of the multiple position circuit breakers 6 are connected to the moving contact B of the load main circuit breaker 3 after the currents intersect (i.e., parallel current confluence);

[0032] The watt-hour meter 5 is connected in parallel to the load main circuit breaker 3;

[0033] The static contact C and the static contact D of the load main circuit breaker (circuit breaker or air switch) 3 are connected to the neutral wire N terminal and the live wire L terminal of the load socket 2 respectively.

[0034] In the present invention, it should be noted that the coil of the watt-hour meter 5 is used to detect the current at the live wire L end (i.e. the moving contact B end) of the load main circuit breaker 3;

[0035] The watt-hour meter 5 is used to detect the voltage, current, electricity and power on the bus (the bus is the total load circuit).

[0036] In terms of specific implementation, the electricity meter 5 is an existing mature instrument. Specifically, the intelligent six-display high-precision electricity meter with model 0X-D69-2058 produced by Ouxin Instrument Co., Ltd. can be used. The electricity meter 5 is used to measure the voltage, current, frequency, power and power display of the load main circuit breaker 3 during the test period.

[0037] In the present invention, in a specific implementation, the gear circuit breaker 6 is an existing mature circuit breaker, specifically a Delixi 1P-10A circuit breaker, which is used to control the on and off of a single load 7.

[0038] In the present invention, in a specific implementation, the load main circuit breaker 3 is an existing mature circuit breaker, specifically a Delixi 2P-32A circuit breaker, which is used to control the on and off of the main circuit of multiple loads 7.

[0039] In the present invention, in a specific implementation, the ground wire E end of the load socket 2 is grounded;

[0040] In the present invention, in a specific implementation, the neutral line N and the live line L of the watt-hour meter 5 are connected to the moving contact A and the moving contact B of the load main circuit breaker 3 respectively.

[0041] In the present invention, in specific implementation, the bus fuse 4 is connected to the load main circuit breaker 3, and the rated current of the bus fuse 4 is 1.5 to 2 times the bus rated current (the bus rated current is equal to the rated current of the total bus circuit of multiple loads 7).

[0042] In the present invention, in a specific implementation, the AC load supporting test equipment further includes a power socket 8, a temperature controller 9, a temperature sensor 90 and a fan 10;

[0043] The power socket 8 is connected to the input end of the temperature controller 9;

[0044] The output end of the temperature controller 9 is connected to the fan 10;

[0045] The temperature controller 9 is provided with a temperature sensor 90;

[0046] The temperature sensor 90 is used to detect the temperature of the load 7 .

[0047] In a specific implementation, the temperature sensor 90 is a non-contact temperature sensor.

[0048] In specific implementation, the neutral line N end of the power socket 8 is connected to the input contact E of the temperature controller 9;

[0049] The live wire L end of the power socket 8 is connected to the input contact F of the temperature controller 9;

[0050] The output contacts G and H of the temperature controller 9 are connected to two power supply terminals of the plurality of fans 10 respectively.

[0051] Furthermore, a socket switch 11 is provided between the live wire L end of the power socket 8 and the input contact F of the temperature controller 9 .

[0052] In specific implementation, the socket switch 11 can be a switch on the power socket 8, which is an existing mature 10A shaped power socket with a switch. Specifically, the Shangjia Electric model AC-01 shaped socket with a switch can be used to connect to the external AC power to power the temperature controller 9.

[0053] In a specific implementation, the ground wire E end of the power socket 8 is grounded;

[0054] It should be noted that the temperature controller 9 is an existing mature gas component. Specifically, the XH-W3002 temperature controller produced by Zuozuo Jiangpin can be used. The temperature controller is equipped with two temperature sensors 90 for detecting the temperature at both ends of the load 7. The temperature controller 9 has its own LCD instrument and setting buttons, which can display the temperature value detected by the sensor 90 and set the temperature threshold. For example, when the temperature controller is set to 45°C, when the temperature detected by the temperature sensor 90 reaches the set threshold of 45°C, the output terminals G and H of the temperature controller will output a 12V voltage.

[0055] In specific implementation, the temperature controller 9 has input contacts E and F for connecting to 220V AC power input, and the temperature controller 9 has output control contacts G and H for providing power to the fan 10. The closure of G and H is affected by the temperature setting of the temperature controller 9. For example, if the temperature controller is set to 45°C, when the temperature sensor 90 detects that the temperature reaches the set threshold of 45°C, the output terminals G and H will output voltage to drive the fan 10 to operate.

[0056] It should be noted that the power socket 8 is connected to the input end of the temperature controller 9 for powering the temperature controller 9. The output end of the temperature controller 9 is connected to the fan 10. The temperature controller 9 is provided with a temperature sensor 90 for detecting the temperature of the environment in which the load 7 is located. When the detected temperature reaches the starting temperature setting value on the temperature controller 9 (for example, 45°C), the temperature controller 9 outputs a voltage to the fan 10 to drive the fan 10 to start running. The air flow formed by the fan 10 takes away the heat from the load 7, thereby cooling the load 7 and other equipment to ensure the normal operation of the equipment.

[0057] It should be noted that temperature controller 9 is connected to power socket 8, thus being isolated and independent from load socket 2. Load socket 2 is used for connecting to power testers, while power socket 8 is used for connecting to temperature control modules such as the temperature controller. This ensures normal temperature control power supply even if there is a problem with the power circuit of load 7.

[0058] It should be noted that the main function of the simulated load unit is to provide a controllable load to test the electrical system.

[0059] In the present invention, in a specific implementation, the load 7 is a resistance wire.

[0060] In a specific implementation, the multiple loads 7 are specifically multiple resistance wires with different powers (ie, multiple different maximum powers).

[0061] In a specific implementation, the maximum power of each load 7 is less than the maximum power of the gear switch 6 to which it is connected.

[0062] It should be noted that the multiple loads 7 are multiple resistance wires of different powers, which are used to be connected in series one-to-one with multiple gear switches 6. One gear switch (i.e., gear switch 6) corresponds to the power of one resistance wire as a load 7, and there are multiple combinations of powers corresponding to multiple gear switches.

[0063] It should also be noted that, for the present invention, since each load 7 is respectively connected to a gear switch 6, the gear switch 6 can be used to control the conduction or disconnection of the branch where any one or more loads 7 are located, thereby adjusting the total resistance of the simulated load unit. Therefore, the simulated load unit of the present invention is a controllable load and a multi-gear adjustable load, which can be used to simulate various load power conditions in actual operations.

[0064] In this utility model, the specific implementation is as follows Figure 2 As shown, the AC load supporting test equipment includes a hollow box 1;

[0065] The front panel of the box body 1 is provided with a load socket 2, a load main circuit breaker 3, an electric meter 5, a gear circuit breaker 6 and a temperature controller 9;

[0066] A power socket 8 is provided on the rear side panel of the box body 1;

[0067] The left and right side panels of the box body 1 are respectively provided with a plurality of fans 10 (not limited to Figure 2 three shown);

[0068] In specific implementation, the internal cavity of the box body 1 is provided with a load 7 and a bus fuse 4 .

[0069] In specific implementation, the ground wire E end of the load socket 2 is connected to the box 1;

[0070] In a specific implementation, the ground wire E end of the power socket 8 is connected to the box 1 .

[0071] It should be noted that for the simulated load unit, the neutral wire N and the live wire L of the load socket 2 are connected to the input end of the load main circuit breaker 3, the ground wire E of the load socket 2 is connected to the outer shell of the box 1, the input end N of the load main circuit breaker 3 (that is, the moving contact A) is connected to the bus fuse 4, and the input end L of the load main circuit breaker 3 (that is, the moving contact B) is connected in parallel with multiple gear circuit breakers 6, and the multiple gear circuit breakers 6 are connected in series one-to-one with multiple loads 7. The other end of the load 7 is connected in parallel to the bus fuse 4, the neutral wire N and the live wire L of the electricity meter 5 are connected in parallel to the load main circuit breaker 3, and the coil of the electricity meter 5 detects the current at the live wire L end of the load main circuit breaker 3.

[0072] In the present invention, in a specific implementation, the load socket 2 is connected to the AC output terminal of an AC output device (such as an inverter) that needs to be tested.

[0073] In a specific implementation, the neutral wire N terminal and the live wire L terminal of the load socket 2 are respectively connected to the neutral wire terminal and the live wire terminal of the AC output device to be tested (such as an inverter).

[0074] In order to more clearly understand the technical solution of the present invention, the working principle of the present invention is described below.

[0075] 1. Pre-install the equipment of this utility model:

[0076] First, the external mains power is connected to the power socket 8 to power the temperature controller 9;

[0077] Then, close the switch of the power socket 8 (i.e., the socket switch 11), and set the starting temperature value on the temperature controller 9 in advance. When the temperature detected by the temperature sensor 90 reaches (i.e., greater than or equal to) the starting temperature setting value, the temperature controller 9 outputs a voltage to drive the fan 10 to start running, taking away the heat from the load 7 and the surrounding environment, and cooling the equipment.

[0078] 2. Test the inverter:

[0079] First, connect the AC output device to be tested (for example, the output end of the inverter to be tested) to the load socket 2;

[0080] Then, close the load main circuit breaker 3, and then close the corresponding gear circuit breaker 6 according to the load power to be tested (that is, adjust the total resistance of the simulated load unit). At this time, the watt-hour meter 5 detects the voltage, current, power on the total load circuit and the power of the entire test section. The voltage, current, power and other data displayed by the watt-hour meter 5 can be used to test the main output electrical performance and energy conversion efficiency of the product (specifically the inverter).

[0081] As mentioned above, it's important to note that the inverter's operating performance includes its primary output electrical performance and its energy conversion efficiency. The inverter's primary output electrical performance includes: rated voltage, rated frequency, real-time output current, and real-time output power. The inverter's energy conversion efficiency = (AC output power ÷ DC input power) * 100%. The inverter's energy conversion efficiency directly reflects the inverter's own energy loss. It's also important to note that the inverter's output current and output power change with load power adjustments, while its output voltage and output frequency remain unchanged, maintaining the rated voltage and rated frequency.

[0082] In specific implementation, the rated voltage of the inverter (i.e. equal to the real-time output voltage, the output voltage of the inverter remains unchanged), the rated frequency (i.e. equal to the real-time output frequency, the frequency of the inverter remains unchanged), the real-time output current and the real-time output power can be read in real time through the electricity meter 5.

[0083] It should be noted that if the fluctuation range of the voltage AC220V and frequency 50HZ at the output end of the inverter does not exceed 3% or 5% of the rated value, the power of the load 7 corresponding to the shift switch 6 can be directly read on the watt-hour meter 5 in real time according to the corresponding rated voltage (i.e., equal to the real-time output voltage, the output voltage of the inverter remains unchanged), rated frequency (i.e., equal to the real-time output frequency, the frequency of the inverter remains unchanged), real-time output current and real-time output power. If the output power of the inverter is insufficient, the output voltage will be lower than the range value.

[0084] In specific implementation, the energy conversion efficiency of the inverter = (AC output power ÷ DC input power) * 100%, where the electricity meter 5 will record the power KWh during the test. The power read by the electricity meter 5 is the AC output power in the formula (that is, the AC output power of the inverter), and the DC input power is obtained from the input end of the inverter (specifically, it can be the power of the configured battery or the power input of the DC device). The conversion efficiency of the inverter can be obtained by dividing the power recorded on the electricity meter 5 by the power at the DC end.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An AC load supporting test equipment, characterized in that: It includes a simulated load unit, multiple gear switches (6), a bus fuse (4), an electric meter (5) and a load main switch (3); A simulated load unit comprising a plurality of loads (7); One end of each of the multiple loads (7) is connected to one end of a gear switch (6); The other ends of the multiple loads (7) are connected to one end of the bus fuse (4) after being converged and intersected; The other end of the bus fuse (4) is connected to the moving contact A of the load main circuit breaker (3); The other ends of the multiple gear switches (6) are connected to the moving contact B of the load main switch (3) after the currents converge and intersect; The watt-hour meter (5) is connected in parallel to the load main circuit breaker (3); The static contact C and the static contact D of the load main circuit breaker (3) are respectively connected to the neutral wire N terminal and the live wire L terminal of the load socket (2).

2. The AC load supporting test equipment according to claim 1, characterized in that: The neutral line N and the live line L of the electric meter (5) are connected to the moving contact A and the moving contact B of the load main circuit breaker (3) respectively.

3. The AC load supporting test equipment according to claim 1 or 2, characterized in that: The AC load supporting test equipment also includes a power socket (8), a temperature controller (9), a temperature sensor (90) and a fan (10); The power socket (8) is connected to the input end of the temperature controller (9); The output end of the temperature controller (9) is connected to the fan (10); The temperature controller (9) is provided with a temperature sensor (90).

4. The AC load supporting test equipment according to claim 3, characterized in that: The neutral line N end of the power socket (8) is connected to the input contact E of the temperature controller (9); The live wire L end of the power socket (8) is connected to the input contact F of the temperature controller (9); The output contact G and the output contact H of the temperature controller (9) are respectively connected to two power supply terminals of the plurality of fans (10).

5. The AC load supporting test equipment according to claim 4, characterized in that: A socket switch (11) is provided between the live wire L end of the power socket (8) and the input contact F of the temperature controller (9).

6. The AC load supporting test equipment according to claim 3, characterized in that: It comprises a hollow box (1); The front side panel of the box body (1) is provided with a load socket (2), a load main circuit breaker (3), an electric meter (5), a gear circuit breaker (6) and a temperature controller (9); A power socket (8) is provided on the rear side panel of the box body (1); The left and right side panels of the box body (1) are respectively provided with a plurality of fans (10) through openings.

7. The AC load supporting test equipment according to claim 6, characterized in that: The internal cavity of the box (1) is provided with a load (7) and a bus fuse (4).

8. The AC load supporting test equipment according to claim 6, characterized in that: The ground wire E end of the load socket (2) is connected to the box (1); The ground wire E end of the power socket (8) is connected to the box (1).

9. The AC load supporting test equipment according to any one of claims 1 to 8, characterized in that: The load socket (2) is connected to the AC output terminal of the inverter to be tested.

10. The AC load supporting test equipment according to claim 9, characterized in that: The neutral wire N terminal and the live wire L terminal of the load socket (2) are respectively connected to the neutral wire terminal and the live wire terminal of the inverter to be tested.

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