CN211653447U - Double-circuit high-power programmable control direct-current load device - Google Patents
Double-circuit high-power programmable control direct-current load device Download PDFInfo
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- CN211653447U CN211653447U CN202020344594.9U CN202020344594U CN211653447U CN 211653447 U CN211653447 U CN 211653447U CN 202020344594 U CN202020344594 U CN 202020344594U CN 211653447 U CN211653447 U CN 211653447U
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Abstract
A double-path high-power programmable control direct-current load device belongs to the field of direct-current loads and aims to solve the problems of improving the power of the existing electronic load and improving the adjustment precision, a power supply module is respectively connected with a control unit, a load control unit and a heat dissipation unit, the load control unit is respectively connected with the control unit and the two paths of load modules, and the heat dissipation unit is connected with the control unit; the load control unit comprises a signal isolation unit, an A/D control unit, a D/A control unit, a sampling unit and a feedback control unit, the load module is connected with the sampling unit, the sampling unit is connected with the A/D control unit, and the A/D control unit is connected with the signal isolation unit; the load module is connected with the feedback control unit, the feedback control unit is connected with the D/A control unit, and the D/A control unit is connected with the signal isolation unit; the signal isolation unit is connected with the control unit, and the effect is that the power of the direct current load device is improved.
Description
Technical Field
The utility model belongs to the direct current load field, more specifically say, relate to a support the powerful, can program and remote control's portable direct current load device of double-circuit.
Background
Enterprises and research institutions often use variable resistors to simulate loads for testing, and different variable resistors are used for different load currents, so that the use is troublesome and the working efficiency is low. The electronic load can simulate the load in a real environment, and can accurately adjust the load current, so that the electronic load becomes a powerful tool in the aspects of design, research and development, production line, detection and the like. In the current dc electronic circuit test system with a computer as the center, various different load currents are often required to be simulated to test the electronic device, and it is very important to realize the adjustment setting and state control of different load values through the computer. Various direct current electronic loads exist in the market at present, but some performances cannot meet the use requirements of some special scenes, and the price is relatively high. Therefore, an electronic load device with excellent load power, accuracy, controllability, and portability is required to meet the use requirements of different situations.
Disclosure of Invention
In order to solve the power that improves current electronic load, improve the problem of adjusting the precision to further realize direct current load device programmable and control and monitor function, the utility model provides a following technical scheme: a double-circuit high-power programmable control direct current load device comprises a control unit, a power supply module, a load control unit, a load module and a heat dissipation unit; the power supply module is respectively connected with the control unit, the load control unit and the heat dissipation unit, the load control unit is respectively connected with the control unit and the two paths of load modules, and the heat dissipation unit is connected with the control unit; the load control unit comprises a signal isolation unit, an A/D control unit, a D/A control unit, a sampling unit and a feedback control unit, the load module is connected with the sampling unit, the sampling unit is connected with the A/D control unit, and the A/D control unit is connected with the signal isolation unit; the load module is connected with the feedback control unit, the feedback control unit is connected with the D/A control unit, and the D/A control unit is connected with the signal isolation unit; the signal isolation unit is connected with the control unit.
Furthermore, the control unit comprises an MCU processing control module, a key module, a storage module, a USB communication module, an Ethernet communication module, a CAN communication module and an LED control module; the MCU processing control module is respectively connected with the key module, the storage module, the CAN communication module and the LED control module, the USB communication module is respectively connected with the MCU processing control module and the computer, and the Ethernet communication module is respectively connected with the MCU processing control module and the computer.
Further, the heat dissipating unit includes a heat dissipating fin and a fan.
Has the advantages that: the utility model discloses a high-power, programmable control's of double-circuit direct current load device has the load module that two tunnel and load control unit are connected, forms two load channels, has improved direct current load device's power. The control unit can transmit the feedback data to the feedback control unit after converting the feedback data through the D/A control unit, and the circuit structure can adaptively adjust the accuracy of the load system. The utility model discloses a link to each other with the computer, can carry out online programming on the computer. The load device provides a plurality of different interfaces for the outside, and the load interfaces of different channels can be selected according to actual use requirements.
Drawings
Fig. 1 is a schematic block diagram of a two-way high-power programmable control direct-current load device.
Fig. 2 is a schematic block diagram of a control unit in the dc load device.
Fig. 3 is a functional block diagram of a load function unit in the dc load device.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1: as shown in fig. 1, a two-way high-power programmable dc load device includes a control unit (STM32F4 series), a power supply module (TPS series), a load control unit, a load module, and a heat dissipation unit. The power module is respectively connected with the control unit, the load control unit and the heat dissipation unit. And the load control unit is respectively connected with the control unit and the two paths of load modules. The heat dissipation unit is connected with the control unit. The control unit plays a master control role in the whole load device system. The power module can provide power with different parameters for use according to different requirements of other modules. The heat dissipation unit comprises a heat dissipation sheet and a fan, and the heat dissipation unit performs corresponding operation according to different temperatures at different positions under the dispatching of the control unit so as to achieve the purpose of reducing the temperature of the load device.
As shown in fig. 2, the control unit includes an MCU processing control module, a key module, a storage module (EEPROM24 series), a USB communication module, an ethernet communication module (W5500), a CAN communication module (MAX series), and an LED control module. And the MCU processing control module is respectively connected with the key module, the storage module, the CAN communication module and the LED control module. And the USB communication module is respectively connected with the MCU processing control module and the computer. And the Ethernet communication module is respectively connected with the MCU processing control module and the computer. The key module can perform some simple control and confirmation operations. The memory module may store some configuration information related to the load device, as well as some important user data and runtime error information. The LED control module may indicate different states and abnormal situations in which the load device is currently located. The computer is connected with the USB communication module or the Ethernet communication module, and the control and monitoring program of the running load device system can monitor the running condition of the whole system device in a single machine mode or a networking mode, and can control the load device in an online programming mode to perform a series of operations of configuration, control and data reading. A plurality of load devices CAN locally form a load device system through the CAN communication module, each device carries out different test operations, and then a computer carries out unified data monitoring and control operations.
As shown in fig. 3, the power isolation unit is connected to the load control unit, the load control unit is connected to the control unit, and the load module is connected to the load control unit. The power supply is supplied to the load control unit for use after passing through the power supply isolation module, so that the effect of safe isolation is achieved, the anti-interference capability is enhanced, and the reliability of the system is improved. The load control unit comprises a signal isolation unit, an A/D control unit, a D/A control unit, a sampling unit and a feedback control unit. The sampling unit is connected with the load module and the A/D control unit, the feedback control unit is connected with the load module and the D/A control unit, the A/D control unit and the D/A control unit are connected with the signal isolation unit, and the signal isolation unit is connected with the control unit. The signal isolation unit isolates signals of the control unit from signals in the load function unit, and the protection and anti-interference effects are achieved. The sampling unit collects data of the load module in real time, the data are converted through the A/D control unit and then transmitted to the control unit for processing, the control unit converts the feedback data through the D/A control unit through a self-adaptive control adjustment algorithm according to the set load data and then transmits the converted feedback data to the feedback control unit for processing, and finally the feedback control unit performs corresponding adjustment processing on the load module, so that the accuracy of the whole load system is adjusted in a self-adaptive mode.
The utility model has the advantages that: the utility model discloses have two tunnel load passageways, every all the way all has 600W's super large load power, and adjustable precision is high, has moreover programmable and remote control and monitor function, and the reliability is high, and is with low costs, convenient to carry, and the use is nimble.
Example 2: a double-circuit high-power programmable control direct current load device comprises a control unit, a power supply module, a load control unit, a load module and a heat dissipation unit. The power module is respectively connected with the control unit, the load control unit and the heat dissipation unit. And the load control unit is respectively connected with the control unit and the two paths of load modules. The heat dissipation unit is connected with the control unit.
The control unit comprises an MCU processing control module, a key module and a storage module, and also comprises a USB communication module, an Ethernet communication module, a CAN communication module and an LED control module. And the MCU processing control module is respectively connected with the key module, the storage module, the CAN communication module and the LED control module. And the USB communication module is respectively connected with the MCU processing control module and the computer. And the Ethernet communication module is respectively connected with the MCU processing control module and the computer. The system control and monitoring program running in the computer can perform the operations of configuration, control and data reading on the load device. The load device is provided with two load interfaces, and the adjustable precision can reach 1 mA. The load device is convenient to carry, the functions and the operation of the load device can be set through programming, and the load device can also be connected with a computer to carry out online programming on the computer so as to control the action of the system device in real time. The load device provides a plurality of different interfaces to the outside, including a load interface, a USB interface, a network interface, a CAN communication interface, a storage interface and the like. The load interfaces of different channels can be selected according to actual use requirements, and meanwhile, the purposes of programming, adjusting and controlling the load device and remotely configuring and reading the data of the load device can be achieved by connecting different communication interfaces.
The utility model has the advantages that: a programmable control direct current load device with double channels and high power comprises a control unit, a power supply module, a load control unit, a load module and a heat dissipation unit. The power module is respectively connected with the control unit, the load control unit and the heat dissipation unit. And the load control unit is respectively connected with the control unit and the two paths of load modules. The heat dissipation unit is connected with the control unit. The control unit comprises an MCU processing control module, a key module and a storage module, and also comprises a USB communication module, an Ethernet communication module, a CAN communication module and an LED control module. And the MCU processing control module is respectively connected with the key module, the storage module, the CAN communication module and the LED control module. And the USB communication module is respectively connected with the MCU processing control module and the computer. And the Ethernet communication module is respectively connected with the MCU processing control module and the computer. The utility model discloses have two tunnel load passageways, every all the way all has 600W's heavy load power, and adjustable precision is high, and has programmable and remote control and monitor function, and the reliability is high, convenient to carry uses in a flexible way.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (3)
1. A double-circuit high-power programmable control direct current load device is characterized by comprising a control unit, a power supply module, a load control unit, a load module and a heat dissipation unit; the power supply module is respectively connected with the control unit, the load control unit and the heat dissipation unit, the load control unit is respectively connected with the control unit and the two paths of load modules, and the heat dissipation unit is connected with the control unit; the load control unit comprises a signal isolation unit, an A/D control unit, a D/A control unit, a sampling unit and a feedback control unit, the load module is connected with the sampling unit, the sampling unit is connected with the A/D control unit, and the A/D control unit is connected with the signal isolation unit; the load module is connected with the feedback control unit, the feedback control unit is connected with the D/A control unit, and the D/A control unit is connected with the signal isolation unit; the signal isolation unit is connected with the control unit.
2. The dual-channel high-power programmable-control direct-current load device according to claim 1, wherein the control unit comprises an MCU processing control module, a key module, a storage module, a USB communication module, an Ethernet communication module, a CAN communication module and an LED control module; the MCU processing control module is respectively connected with the key module, the storage module, the CAN communication module and the LED control module, the USB communication module is respectively connected with the MCU processing control module and the computer, and the Ethernet communication module is respectively connected with the MCU processing control module and the computer.
3. The dual high power, programmable controlled dc load device of claim 1, wherein the heat sink unit comprises a heat sink and a fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020344594.9U CN211653447U (en) | 2020-03-18 | 2020-03-18 | Double-circuit high-power programmable control direct-current load device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020344594.9U CN211653447U (en) | 2020-03-18 | 2020-03-18 | Double-circuit high-power programmable control direct-current load device |
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| CN211653447U true CN211653447U (en) | 2020-10-09 |
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| CN202020344594.9U Active CN211653447U (en) | 2020-03-18 | 2020-03-18 | Double-circuit high-power programmable control direct-current load device |
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