one. background analysis This article refers to the address: http:// Automotive electronics is a general term for vehicle bodies and electronic control devices for on-board vehicles , including engine control systems, chassis control systems, and body electronics control systems. As the means of transportation for people's daily travel, the most important role of automotive electronics is to improve the safety, comfort, economy and entertainment of the car. The most important thing is safety. In a car, once one of the systems or components is working abnormally, the vehicle cannot be started, which seriously threatens life safety. Therefore, whether it is a car or auto parts manufacturer, each component will be strictly and carefully tested before leaving the factory, such as sensor test, engine test, battery test, fuse test and so on. Second, automotive electronics testing how to choose DC electronic load In the automotive electronics field related products testing, you need to use a lot of different specifications of the electronic load, and even with the relevant software to quickly and easily complete the test and get accurate test data. At the same time, if the electronic load used can have communication functions and open communication protocols, and is convenient for remote control, and can be developed twice, it will definitely be an excellent choice. ITECH has developed the IT8800 electronic load series that covers a wide range of applications. The electronic load series combines the testing requirements of various products in the automotive electronics field. The power range is from 150W to 50KW, the voltage range is up to 1000V, and the current range is up to 3000A. It is an application-flexible and functional electronic load. Can meet the various needs of the above automotive electronic test, and has a high cost performance. The following is a detailed example of the perfect application of this series of DC electronic loads in generator testing in the automotive electronics industry. Third, the application case of DC electronic load in generator test In the test of the generator, the electronic load can be divided into four different items from the idle speed of the generator to the full speed to simulate the power generation performance of the generator under various conditions during the running of the vehicle. In this whole process, real-time observation of voltage and current data is required. The traditional load box cannot meet this requirement at all, and the test data is inaccurate, so it is necessary to use a professional electronic load for testing. So why use the electronic load series from ITECH ITECH for automotive generator testing? The reason is that it not only fully meets the testing needs, but also has significant advantages. 1. Functional overview: Any test of electronic products will have requirements for test accuracy and processing speed. In the test of the automobile generator, since the start-up of the generator is a short-time process, in this short period of time, a large change is generated inside the generator. In such cases, engineers will of course focus on the rate at which the instrument is sampled and recorded. This series of electronic loads are based on the latest CPU control technology, the internal sampling rate of the instrument is relatively high, the data update rate is also very fast, the voltage / current measurement rate can be as high as 50KHZ, and its resolution can be as high as 0.1mV/0.01 mA, so in the test of the generator, it can fully ensure the accuracy of the test. At the same time, the data during the test, such as voltage, current, power, etc., will be displayed on the instrument panel in real time, which is convenient for real-time observation and recording, and detects abnormalities in time. The digital operation interface also makes it easy to set test data. One of the following models of the ITECH IT8800 DC electronic load series (power 300W): 2. Power optional: When testing automotive generators, different tests have different requirements on power. If each different power test uses different series of products, the difference in function and operation will cause the engineers to conduct experiments. inconvenient. Don't look at this electronic load is very small, it is just a model in the same series, there are many other models to choose from. Idex IT8800 electronic load series, single-channel power from 150W to 50KW, the maximum power can reach 300KW. Therefore, it can cover a wide range of power and meet a variety of tests, which brings great convenience to both device selection and experimental operation. 3. Multiple working modes: In the test of automotive generators, there is a test of the load performance of the generator. In this test, the electronic load was required to simulate different speeds of the generator in order to obtain a complete test result. This series of DC electronic loads can be selected from a variety of operating modes, such as load performance testing for generators, either in CC mode or in CV mode, both models can simulate generators. Different speeds help engineers get perfect test results. 4. List function: In addition to simulating the different speeds of the generators, simulating the current flowing through the generator at each different speed is also an important experimental item. Through these two important experimental data, we can draw a curve of the speed and current changes to find out the relationship between the two. The electronic load of the ITECH IT8800 series has a list function, which can edit the current and voltage waveforms directly on the panel to simulate the current state of the generator at different speeds, as shown below: In addition to editing the waveform on the panel, it can of course be controlled by a computer. This makes the operation more flexible. 5. Simulate inductive or capacitive loads: Usually the load carried by a car generator is not a purely resistive load, it may be an inductive or capacitive electronic load. The electronic load of the IT8800 series adds CZ mode to meet the needs of analog inductive or capacitive loads. 6. Multiple interfaces support fast communication: When the car generator starts up, it will generate a large current instantaneously. When the electronic load is operated by the computer, if the communication is slow, it is difficult to capture the data of this moment of high current. The ITECH Electronics IT8800 series electronic load series has many standard communication interfaces on the back of it, as shown below: These standard communication interfaces include RS232, USB, GPIB and Ether Net. They can support a variety of communication functions. The communication time can be as fast as 5ms. It can collect the state of high current when the generator starts, and the working process is even more More data. 7. More application advantages: The electronic load of the ITECH IT8800 series features OCP/OVP/OPP/OTP and reverse polarity protection to prevent damage to the tested equipment during testing. It is also convenient for secondary development. The computer can plot the voltage and current status during the test in the form of a curve to facilitate later analysis of the data. Fourth, summary: The above test plan for this generator is one of the application cases of the IT8800 series DC electronic load from ITECH in the automotive electronics industry, except that it can be programmed in the test of the generator. Automated monitoring, accurate testing and other functions, this DC electronic load has a wide range of applications throughout the automotive electronics industry, as well as other related tests in the electronics industry, and shows the same obvious advantages. SHAOXING COLORBEE PLASTIC CO.,LTD , http://www.fantaicolorbee.com
