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IT6500 series DC power supply built-in international test standard voltage curve
In order to facilitate testing of related products in the automotive electronics industry and provide uniform test standards, the International Organization for Standardization provides a series of voltage transient waveform test templates to simulate voltage waveforms in various situations. To predict the voltage transient waveform of a car under various operating environments, an engineer can test the part under test in the laboratory according to the voltage waveform defined by the template to determine whether the product can meet the requirements. Such as the German standard DIN40839 standard automotive power network voltage curve and the international standard ISO-16750-2 pulse waveform is the current automotive electronics industry's hottest two unified testing standards. Therefore, in order to make the tests in the on-board electronics and even the entire automotive electronics industry more standard and accurate, thereby eliminating potential safety hazards for automobiles, ITECH has also been working on the testing instruments for related products testing in the automotive electronics field and developed them. A series of high-power DC power products that can simulate the voltage curve of the German DIN40839 standard automotive power network and the international standard ISO-16750-2 pulse waveform - IT6500 DC power supply series.
German DIN40839 standard automotive power network voltage curve
DIN40839 is a standard automotive power network voltage curve used in automotive electronics industry related tests issued by Germany’s automotive electronics leader, Germany. After the German standard was promulgated, manufacturers in the global automotive electronics industry followed suit. A standard automotive power network voltage curve is used in various related tests.
For example, in an automobile engine startup test, the voltage provided by the engine on the automobile instantly drops. In this case, if the battery on the automobile cannot withstand the impact of such a voltage drop, it will stop working because the voltage is dropping. At that time, the speed is also very fast, and the real simulation of the voltage waveform at the start of the car engine becomes a problem. When an engineer is doing tests in this area, if Idix IT6500 series DC power supply is used, the voltage curve of the built-in German DIN40839 standard automotive power network can completely solve this problem. Engineers can also set this curve in the IT6500 DC power supply, and according to their actual needs, use the list mode provided by the IT6500 series DC power supply to edit and modify the waveforms on their own, so as to meet the experimental requirements.
The oscillograms of the IT6500 series DC power simulation car engine startup electrical test are as follows:
When an engineer uses this waveform for related tests, it can adjust its rise and fall slopes, and its voltage rise speed can reach very high, and the voltage can rise from 0V to 20V within 2ms. At the same time, in order to make testing more convenient, it is also possible to make full use of the multiple analog interfaces of the IT6500 series DC power supply and the master-slave series parallel mode.
ISO-16750-2 International Standard Pulse Waveform
The International Organization for Standardization provides a series of templates suitable for voltage transient waveform testing in the automotive electronics industry to simulate voltage waveforms in various situations. ISO-16750-2 document is one of them. How does it apply in a specific test? What role does it have? In general, the waveforms contained in the ISO-16750-2 document can be used to test the immunity of automotive electrical and electronic equipment. The following are the specific applications:
(I) Impact of Instantaneous Voltage Drop on Automotive Electronic Equipment
In a car circuit, when one of the circuits fails, the fuse blows, and therefore, the voltage of the power supply equipment of other circuits drops instantaneously, and if the electronic equipment in the circuit cannot withstand the voltage The impact of a drop will lead to the normal use of the equipment in it, which will affect the normal operation of the car and the onboard electronics.
When engineers perform related tests, they can use the ISO-16750-2 international standard pulse waveform built into the IT6500 series DC power supply for testing. This pulse waveform can simulate the instantaneous voltage drop caused by the melting of conventional fuse elements in another circuit, and this full simulation is used to test the electronic devices on the vehicle. The waveforms of the IT6500 series DC power supply for this test are as follows:
In this waveform diagram, it is easy to see that in the very short time from 10 s to 10.1 s, the voltage instantaneously falls and then instantaneously returns to the position. The actual simulation simulates the actual situation and can fully satisfy the test of the impact of the instantaneous voltage drop on the automotive electronic equipment.
(b) The effect of different voltage sags on automotive electronics with reset function
The various devices in the car are complicated, and some of them are equipped with a reset function, such as a microcontroller commonly used in automotive electronics. Imagine if an automotive electronic device with one or more microcontrollers is installed, once one of the microcontrollers cannot be reset, the device will certainly not be able to operate, and this will also pose a threat to security. Therefore, the detection of the reset performance of the equipment has become an extremely important experiment in numerous tests in the automotive electronics industry.
In this test, engineers can use the IT6500 series DC power supply to simulate different voltage sags, thus verifying the reset performance of automotive electronic equipment for different voltage sags. The waveforms are as follows:
Here we can see, in this test, IT6500 series DC power supply simulation of the voltage waveform is a regular gradient curve, the power supply voltage drops at a rate of 5% to maintain 5s, then rise to the start value, at least Maintain the function test for 10s; then the voltage drops again, and so on and back, ensuring that the reset function of the device under test is fully verified.
(III) Characteristics of electronic equipment when starting and after starting the vehicle
When the car is started, its real voltage transient is not performed with a completely linear waveform. In the ISO-16750-2 international standard pulse waveform, it is more realistic to use an AC voltage waveform curve with superimposed frequencies. Simulation of the DC voltage with ripple at the start of the car at the start of the car to detect the characteristics of the electronic equipment on the car at start-up and after start-up in this highly simulated situation. IT6500 series DC power supply can completely do this. The following figure shows the waveform of the IT6500 series DC power supply during this test:
In the time period t8 in the figure, the voltage curve is a curve containing an alternating voltage waveform with a superimposed frequency of 2 Hz. By using this curve, the DC voltage with ripple at the start of a car can be more realistically simulated for a car. The impact of the performance of electronic devices.
to sum up
The automobile integrates safety and comfort, so the detection of vehicle electronic equipment is very critical. The IT6500 series DC power supply of ITECH has built-in the German standard DIN40839 standard automotive power network voltage curve and the international standard ISO-16750-2. Pulse waveform is the preferred power testing instrument in the automotive electronics industry. In addition, Idix IT6500 series DC power supply has high voltage and the widest voltage and current utilization rate of its kind, and it is widely used in the testing of electronic equipment in automotive electronics and other electronic industries. For example, its built-in multiple standard communication interfaces and analog interfaces can meet the needs of a variety of communications and industrial control. It can be seen that the IT6500 series DC power supply can perform a variety of tests to provide a very good choice for engineers' equipment selection. Good choice.