CN219224963U - Electronic load simulation device and electronic load simulation system - Google Patents
Electronic load simulation device and electronic load simulation system Download PDFInfo
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- CN219224963U CN219224963U CN202223206852.5U CN202223206852U CN219224963U CN 219224963 U CN219224963 U CN 219224963U CN 202223206852 U CN202223206852 U CN 202223206852U CN 219224963 U CN219224963 U CN 219224963U
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Abstract
The utility model provides an electronic load simulation device and an electronic load simulation system, which relate to the technical field of power electronics, wherein the device comprises: the system comprises an acquisition module, a storage module, a main control module and at least one load simulation module, wherein the acquisition module is connected with an actual load and the main control module and is used for acquiring load data of the actual load; the storage module is connected with the main control module and used for storing the load data acquired by the acquisition module; the main control module is used for carrying out state control on the load simulation module based on load data; the load simulation module is connected with the main control module and is used for simulating the actual load based on the load data. The utility model can perfect the test scheme of the simulated electronic load by collecting the actual load characteristic.
Description
Technical Field
The present utility model relates to the field of power electronics, and in particular, to an electronic load simulation device and an electronic load simulation system.
Background
The electronic load is an essential research and development test device in the research and development process of power supply products or power supply modules, can simulate various capacitive loads, inductive loads and resistive loads, and provides great help for the research and development test of power supplies and the improvement of production test efficiency.
However, the load characteristics of the power supply are complex, in an ideal state, the load characteristics can be set by inputting parameter information into the electronic load, but the actual load cannot be simply regarded as a capacitive load, an inductive load and a resistive load, and often various loads are superimposed, so that the load test equipment cannot completely simulate all load conditions in the ideal state in the actual state, and the problem of abnormality or inefficiency of a power supply product under the load conditions may occur.
Disclosure of Invention
The utility model provides an electronic load simulation device and an electronic load simulation system, which are used for solving the defect that a load in an actual state cannot be completely simulated in an ideal state in the prior art.
The utility model provides an electronic load simulation device, comprising: the system comprises an acquisition module, a storage module, a main control module and at least one load simulation module, wherein:
the acquisition module is connected with the actual load and the main control module and is used for acquiring load data of the actual load;
the storage module is connected with the main control module and used for storing the load data acquired by the acquisition module;
the main control module is used for carrying out state control on the load simulation module based on load data;
the load simulation module is connected with the main control module and is used for simulating the actual load based on the load data.
According to the electronic load simulation device provided by the utility model, the acquisition module comprises: output power, current acquisition unit and voltage acquisition unit, wherein:
the output power supply is connected with the current acquisition unit and the voltage acquisition unit and is used for supplying power to the current acquisition unit, the voltage acquisition unit, the actual load, the main control module and the load simulation module;
the current acquisition unit is connected with the actual load and the main control module and is used for acquiring current data of the actual load;
the voltage acquisition unit is connected with the main control module and is used for acquiring voltage data of the actual load.
According to the electronic load simulation device provided by the utility model, the output power supply comprises at least one power supply output port;
the analog load, the current acquisition unit, the voltage acquisition unit, the actual load, the main control module and the load analog module are all connected with the same power output port;
or the simulated load, the current acquisition unit, the voltage acquisition unit, the actual load, the main control module and the load simulation module are respectively connected with the power output ports.
According to the electronic load simulation device provided by the utility model, the load simulation module comprises: RC unit and load unit, wherein:
the input end of the RC unit is connected with the output end of the main control module, the output end of the RC unit is connected with the input end of the load unit, and the output end of the load unit is connected with an analog load.
According to the electronic load simulation device provided by the utility model, the RC unit comprises: resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1 and capacitor C2, wherein:
one end of the resistor R1 is used as an input end of the RC unit, the other end of the resistor R1 is connected with one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R3 and one end of the resistor R4, the other end of the capacitor C1, the other end of the capacitor C2 and the other end of the resistor R4 are grounded, the other end of the resistor R2 is connected with a power supply voltage end, and the other end of the resistor R3 is used as an output end of the RC unit.
According to the electronic load simulation device provided by the utility model, the load unit comprises: the operational amplifier M1 and the power MOS tube Q1, wherein:
the non-inverting input end of the operational amplifier M1 is used as the input end of the load unit, the inverting input end of the operational amplifier M1 is connected with the source electrode of the power MOS tube Q1, the output end of the operational amplifier M1 is connected with the grid electrode of the power MOS tube Q1, and the drain electrode of the power MOS tube Q1 is used as the output end of the load unit.
According to the electronic load simulation device provided by the utility model, the load unit further comprises: and one end of the resistor R5 is connected with the inverting input end of the operational amplifier M1 and the source electrode of the power MOS tube Q1, and the other end of the resistor R5 is grounded.
According to the electronic load simulation device provided by the utility model, the power MOS tube Q1 is an NMOS tube.
According to the electronic load simulation device provided by the utility model, the main control module comprises: and the pulse width modulation unit is connected with the RC unit and used for controlling the power MOS tube to work in a linear region.
The utility model also provides an electronic load simulation system, which comprises: the electronic load simulation device comprises power supply equipment and any one of the electronic load simulation device, wherein the power supply equipment is connected with the output end of a load unit in the electronic load simulation device.
According to the electronic load simulation device and the electronic load simulation system, the load characteristics of the actual load are collected through the collection module, the load simulation module is controlled through the main control module to simulate the load characteristics of the actual load, the load test scheme of the actual load is perfected, the test result is prevented from being influenced by errors of the load between the ideal state and the actual state, meanwhile, the load simulation module can be duplicated in multiple ways, the simulation cost is reduced, and the simulation efficiency is improved.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a connection of an electronic load simulator according to an embodiment of the present utility model;
FIG. 2 is a second schematic diagram of a connection of an electronic load simulator according to an embodiment of the present utility model;
fig. 3 is a schematic circuit connection diagram of an RC unit according to an embodiment of the present utility model;
fig. 4 is a schematic circuit connection diagram of a load unit according to an embodiment of the present utility model.
Reference numerals:
110: a main control module; 120: an acquisition module; 121: an output power supply; 122: a current collection unit; 123: a voltage acquisition unit; 130: a storage module; 140: a load simulation module; 141: an RC unit; 142: and a load unit.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Aiming at the problem that in the prior art, a load in an actual state cannot completely simulate a load in an ideal state, the utility model provides an electronic load simulation device, and fig. 1 is one of connection schematic diagrams of the electronic load simulation device provided in the embodiment of the utility model, as shown in fig. 1, the electronic load simulation device includes: the system comprises an acquisition module 120, a storage module 130, a main control module 110 and at least one load simulation module 140, wherein:
the acquisition module 120 is connected with the actual load and the main control module 110, and is used for acquiring load data of the actual load;
the storage module 130 is connected to the main control module 110, and is configured to store load data acquired by the acquisition module 120;
the main control module 110 is configured to perform state control on the load simulation module 140 based on load data;
the load simulation module 140 is connected to the main control module 110, and is configured to simulate an actual load based on the load data.
Specifically, in the prior art, when simulating a load, most of the time, the load in the actual state cannot be simply regarded as a capacitive load, a inductive load and a resistive load based on the input load parameter, and the load in the actual state is a superposition of various types of loads, so that a gap exists between the load in the ideal state and the load in the actual state, and the load test device cannot completely simulate all load conditions only based on the load parameter. When the simulation is performed, the main control module 110 may obtain the load data from the storage module 130 and control the load simulation module 140 to perform the simulation on the load data. Meanwhile, the main control module 110 can perform multiplex copying according to the simulated load simulation module 140, is simple to operate and low in cost, and can further test the test conditions of simultaneous starting, sequential starting or appointed sequential starting of the multiplex loads.
Optionally, the storage module 130 includes, but is not limited to: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), magnetic disk, optical disk.
Optionally, the actual load may be an electric device such as an electric fan or a motor.
Alternatively, the main control module 110 may be a micro control unit (Microcontroller Unit; MCU).
Optionally, fig. 2 is a second connection schematic diagram of the electronic load simulator according to the embodiment of the present utility model, as shown in fig. 2, the collection module 120 includes: an output power supply 121, a current collection unit 122, and a voltage collection unit 123, wherein:
the output power supply 121 is connected to the current collecting unit 122 and the voltage collecting unit 123, and is configured to supply power to the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110, and the load simulation module 140;
the current collection unit 122 is connected to the actual load and the main control module 110, and is configured to collect current data of the actual load;
the voltage acquisition unit 123 is connected to the main control module 110, and is configured to acquire voltage data of the actual load.
Specifically, based on the characteristic that any load change of capacitive load, inductive load and resistive load is reflected on abrupt change values of current and voltage, in the embodiment of the present utility model, a current collecting unit 122 and a voltage collecting unit 123 are provided, and when an output power source 121 supplies power to the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110 and the load simulation module 140, the current collecting unit 122 collects current data of the actual load, and the voltage collecting unit 123 collects voltage data of the actual load.
Alternatively, the acquisition module 120 may acquire the current data and the voltage data at equal time intervals for the actual load, generate an acquisition data table as shown in table 1, and the time interval between two adjacent acquisitions may be 500ms depending on the computing power of the processor of the main control module 110.
In addition, the acquisition module 120 may also perform variable time interval acquisition on the actual load, that is, the time interval may be set to a smaller time interval in the case that the actual load changes more frequently, and may be set to a larger time interval in the case that the actual load works more smoothly.
Table 1 data acquisition table
| Acquisition time point | Voltage data | Current data |
| T0 | V0 | I0 |
| T1 | V1 | I1 |
| T2 | V2 | I2 |
| …… | …… | …… |
| Tn | Vn | In |
Optionally, the collection time point of each collection may be determined and stored in the storage module 130 together with the collected voltage data and the current data, so that the master control module 110 outputs the pulse width modulation signals PWM with different duty ratios at the corresponding time points by reading the load data in the storage module 130, thereby controlling the output load voltage based on the collected voltage data and controlling the output load current based on the collected current data, so that the load simulation module 140 can simulate based on the load voltage and the load current.
Optionally, the current collecting unit 122 may be a current collecting chip, and the current collecting chip may include multiple paths of collecting components, where the collecting components may be sampling resistors with fixed resistance values, and further collect current data by determining sampling voltage values at two ends of the collecting components.
Optionally, the output power source 121 includes at least one power output port;
the analog load, the current collection unit 122, the voltage collection unit 123, the actual load, the main control module 110 and the load analog module 140 are all connected to the same power output port;
or, the analog load, the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110, and the load analog module 140 are respectively connected to the power output ports.
Specifically, in the embodiment of the present utility model, there may be 1 or at least two power output ports of the output power source 121, and the analog load, the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110 and the load simulating module 140 may be connected to the same power output port, that is, the energy required by the analog load, the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110 and the load simulating module 140 may be output by one power output port. In addition, the analog load, the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110, and the load simulation module 140 may be connected to different power output ports, respectively, that is, the energy required for the analog load, the current collecting unit 122, the voltage collecting unit 123, the actual load, the main control module 110, and the load simulation module 140 may be provided by a plurality of power output ports.
Optionally, as shown in fig. 2, the load simulation module 140 includes: RC unit 141 and load unit 142, wherein:
the input end of the RC unit 141 is connected with the output end of the main control module 110, the output end of the RC unit 141 is connected with the input end of the load unit 142, and the output end of the load unit 142 is connected with an analog load.
Optionally, fig. 3 is a schematic circuit connection diagram of an RC unit 141 according to an embodiment of the present utility model, as shown in fig. 3, where the RC unit 141 includes: resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1 and capacitor C2, wherein:
one end of the resistor R1 is used as an input end of the RC unit 141, the other end of the resistor R1 is connected with one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R3 and one end of the resistor R4, the other end of the capacitor C1, the other end of the capacitor C2 and the other end of the resistor R4 are grounded, the other end of the resistor R2 is connected with a power supply voltage end, and the other end of the resistor R3 is used as an output end of the RC unit 141.
Specifically, after the master control module 110 outputs pulse width modulation signals with different duty ratios based on the collected load data, the pulse width modulation signals are input to the input end of the RC module, filtered by the RC module, and output to the load unit 142 through the output end VREF0, so that the input voltage of the load unit 142 is a direct current voltage, and after the load unit 142 is regulated, the constant current operation of the load unit 142 is realized, so that the analog load stably operates.
Optionally, fig. 4 is a schematic circuit connection diagram of a load unit 142 according to an embodiment of the present utility model, as shown in fig. 4, where the load unit 142 includes: the operational amplifier M1 and the power MOS tube Q1, wherein:
the non-inverting input end of the operational amplifier M1 is used as the input end of the load unit 142, the inverting input end of the operational amplifier M1 is connected with the source electrode of the power MOS transistor Q1, the output end of the operational amplifier M1 is connected with the gate electrode of the power MOS transistor Q1, and the drain electrode of the power MOS transistor Q1 is used as the output end of the load unit 142.
Optionally, the load unit 142 further includes: and one end of the resistor R5 is connected with the inverting input end of the operational amplifier M1 and the source electrode of the power MOS tube Q1, and the other end of the resistor R5 is grounded.
Optionally, the resistor R5 is a sampling resistor, the resistance value of the resistor R5 is smaller, the precision is higher, and the resistor R5 may be a plug-in resistor or a chip resistor, which is not limited in the embodiment of the present utility model.
Optionally, as shown in fig. 4, the power MOS transistor Q1 is an NMOS transistor.
Optionally, the main control module 110 includes: and the pulse width modulation unit is connected with the RC unit 141 and is used for controlling the power MOS tube to work in a linear region.
Specifically, the pulse width modulation unit is used for rapidly opening and closing the switch between the analog load and the main control module 110, that is, controlling the power MOS transistor Q1 to always operate in a linear region, where the linear region is a state of the power MOS transistor Q1 between an off state and an on state, so that the power MOS transistor Q1 is equivalent to a constant resistor, reducing the average transmissible power amount of the electric signal applied by the main control module 110 to the load analog module 140, and realizing control of the average current and voltage provided to the analog load.
Optionally, the non-inverting input terminal of the operational amplifier M1 is a given voltage value V2 modulated by the pulse width modulation unit of the main control module 110, and the voltage value on the resistor R5 is equal to the inverting voltage value V1 of the inverting input terminal of the operational amplifier M1. If the given voltage V2 is greater than the inverted voltage V1, the output signal control_0 of the operational amplifier M1 is increased to make the power MOS transistor Q1 in a state of being biased to the conductive region but not conductive, and the current I between the gate and the source of the power MOS transistor Q1 GS Negligible current I between drain and source of power MOS transistor Q1 DS Increase, i.e. current I flowing through resistor R5 R5 Increasing, and since the resistance of the resistor R5 is fixed, the voltage value at both ends of the resistor R5 increases, that is, the voltage value V1 at the inverting input end of the operational amplifier M1 increases, and when the inverting voltage value V1 increases to be larger than the given voltage value V2, the output signal control_0 of the operational amplifier M1 decreases, and the current I between the gate and the source of the power MOS transistor Q1 decreases GS Negligible current I between drain and source of power MOS transistor Q1 DS Reducing, i.e. the current I flowing through the resistor R5 R5 Reduction ofAnd the resistance value of the resistor R5 is fixed, so that the voltage value at two ends of the resistor R5 is reduced, and the reversed-phase voltage value V1 is reduced again. As described above, the inverted voltage V1 is continuously increased and decreased, and the inverted voltage V1 fluctuates around the given voltage V2 by a small extent, which can be regarded as that the load unit 142 will eventually be stabilized on the given voltage V2 output by the main control unit, so as to implement constant current operation, so that the load unit 142 can be connected to the analog load to stably operate.
In addition, after the above-mentioned modulation, after the analog load connected to the load unit 142 works stably, multiple copies of the load analog modules 140 may be performed, so as to obtain multiple load analog modules 140, where each load analog module 140 is connected to one analog load, and each load analog module 140 is independently controlled. The main control module 110 can respectively control each load simulation module 140 through the output pulse width modulation signal PWM, so that the multiple paths of simulation loads are started simultaneously, or sequentially, or the specified sequence is started, and further obtain the test condition of the simulation load simulation actual load.
According to the electronic load simulation device provided by the utility model, the load characteristics of the actual load are acquired through the acquisition module 120, the load simulation module 140 is controlled through the main control module 110 to simulate the load characteristics of the actual load, the load test scheme of the actual load is perfected, the test result is prevented from being influenced by the error of the load between the ideal state and the actual state, meanwhile, the load simulation module 140 can be duplicated in multiple ways, the simulation cost is reduced, and the simulation efficiency is improved.
The utility model also provides an electronic load simulation system, which comprises: a power supply device and an electronic load simulator as claimed in any one of the preceding claims, the power supply device being connected to the output of the load unit 142 in the electronic load simulator.
It should be noted that, the power supply device is a simulated load, and the actual load can be simulated by the power supply device.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. An electronic load simulator, comprising: the system comprises an acquisition module, a storage module, a main control module and at least one load simulation module, wherein:
the acquisition module is connected with the actual load and the main control module and is used for acquiring load data of the actual load;
the storage module is connected with the main control module and used for storing the load data acquired by the acquisition module;
the main control module is used for carrying out state control on the load simulation module based on load data;
the load simulation module is connected with the main control module and is used for simulating the actual load based on the load data.
2. The electronic load simulator of claim 1, wherein the acquisition module comprises: output power, current acquisition unit and voltage acquisition unit, wherein:
the output power supply is connected with the current acquisition unit and the voltage acquisition unit and is used for supplying power to the current acquisition unit, the voltage acquisition unit, the actual load, the main control module and the load simulation module;
the current acquisition unit is connected with the actual load and the main control module and is used for acquiring current data of the actual load;
the voltage acquisition unit is connected with the main control module and is used for acquiring voltage data of the actual load.
3. The electronic load simulator of claim 2, wherein the output power source comprises at least one power source output port;
the analog load, the current acquisition unit, the voltage acquisition unit, the actual load, the main control module and the load analog module are all connected with the same power output port;
or the simulated load, the current acquisition unit, the voltage acquisition unit, the actual load, the main control module and the load simulation module are respectively connected with the power output ports.
4. The electronic load simulator of claim 1, wherein the load simulator module comprises: RC unit and load unit, wherein:
the input end of the RC unit is connected with the output end of the main control module, the output end of the RC unit is connected with the input end of the load unit, and the output end of the load unit is connected with an analog load.
5. The electronic load simulator of claim 4, wherein the RC unit comprises: resistor R1, resistor R2, resistor R3, resistor R4, capacitor C1 and capacitor C2, wherein:
one end of the resistor R1 is used as an input end of the RC unit, the other end of the resistor R1 is connected with one end of the capacitor C1, one end of the capacitor C2, one end of the resistor R3 and one end of the resistor R4, the other end of the capacitor C1, the other end of the capacitor C2 and the other end of the resistor R4 are grounded, the other end of the resistor R2 is connected with a power supply voltage end, and the other end of the resistor R3 is used as an output end of the RC unit.
6. The electronic load simulator of claim 4 or 5, wherein the load unit comprises: the operational amplifier M1 and the power MOS tube Q1, wherein:
the non-inverting input end of the operational amplifier M1 is used as the input end of the load unit, the inverting input end of the operational amplifier M1 is connected with the source electrode of the power MOS tube Q1, the output end of the operational amplifier M1 is connected with the grid electrode of the power MOS tube Q1, and the drain electrode of the power MOS tube Q1 is used as the output end of the load unit.
7. The electronic load simulator of claim 6, wherein the load cell further comprises: and one end of the resistor R5 is connected with the inverting input end of the operational amplifier M1 and the source electrode of the power MOS tube Q1, and the other end of the resistor R5 is grounded.
8. The electronic load simulator of claim 6, wherein the power MOS transistor Q1 is an NMOS transistor.
9. The electronic load simulator of claim 6, wherein the master control module comprises: and the pulse width modulation unit is connected with the RC unit and used for controlling the power MOS tube to work in a linear region.
10. An electronic load simulation system, comprising: power supply equipment and an electronic load simulator according to any of claims 1 to 9, said power supply equipment being connected to the output of a load unit in said electronic load simulator.
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| CN202223206852.5U CN219224963U (en) | 2022-11-30 | 2022-11-30 | Electronic load simulation device and electronic load simulation system |
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