Inductor saturation test circuit software

The definition of inductance is the ratio of flux linkage to the ampere turn producing the magnetic flux. There is no saturation current for air core inductors. The magnetic flux produced will be proportional to the magneto motive force. Each dc can supply up to 25 a, and 10 units may be paralleled to supply up to 250 a if required. The saturation point is then found when the current going through the inductor suddenly peaks. Direct modeling of inductor saturation behavior in a spicelike. Using the captured waveform to find the knee point we can estimate the saturation current. As you can see from the picture above, 16 4700uf electrolytic caps are used to compensate for the sudden voltage drop when the mosfet is activated. Many modern circuits monitor the max inductor current to prevent the power transistor from blowing out, and some even use the inductor max current as a means of regulation. How to test an inductor with a multimeter 2020 proper. A video of the system in action is embedded after the break. After initial testing, i did add a small opamp circuit to feed the.

Making an inductor saturation current tester hackaday. Help with testing inductor saturation current eevblog. To check an inductor whether its good or faulty one, we need to check the resistance of its terminals. Using the ti switcher pro software free download, requires free account, other 10uh inductors were given as options, but our preferred inductor was not. What is the difference between a rated current and saturation current of an inductor. The circuit consists of a constant dc voltage source and an inductor.

Test fixture to measure the saturation characteristics of coupled multiwinding inductors. Accurately test magnetics carrying dc bias current power. Sweep software is provided for measuring inductance at increasing levels of bias current to confirm the saturation point of the part under test. Improving the accuracy of your spice simulations of. Competitive prices from the leading 30a smd power inductors distributor. Effects of saturation current rating of inductor in buck. I built this pretty simple inductor saturation current tester for testing the. Kalles tester simply consists in a nmosfet switching power through a load while a shunt allows current measurements. Difference between inductor saturation current and rated. I had the need to test the saturation current of some inductors i had wound. In the inductor, there is resistive material and every resistive material has its resistance, using that resistance measurement we can find out that an inductor is good one or not. Read about element14 inductor modeling and simulation part 2 of 2 on. This is the saturation point of the inductor, and it usually makes little sense to. Measurement with a shunt resistor instead of a current clamp would show strongly coupled noise, especially at the peak currents, making it difficult for inductor saturation to be detected.

Here is a short overview of a quick evening project of mine. From the datasheet, i could see that the saturation current value is more than the. Koln, germany to measure the magnetic flux, a xantrex xfr 2. Oh yeah one more thing worth mentioning is that sometimes the best circuit to use to test an inductor is the actual circuit it is being used in. Any other inductor with a magnetic material as core will have saturation current. Performing in circuit inductor and transformer measurements in smps. I was tasked with building a buck circuit and a preferred 10uh inductor was specd. This circuit can test inductors over the whole range of inductances usually seen in switching power supplies, inverters, chargers, motor controllers and the like, and it is capable of testing the saturation current up to about 100a. The control voltage pot and software is set so frequency drops with clockwise rotation of the switchpot which. If id want to make this circuit better i would swap my 45 mohm rds fet.

The software could be changed to allow longer charge times for testing larger inductances to the full current limit. Kalle hyvonen on fpga based playstation portable display driver. Slider, software development, software hacks, solar hacks, space. Test circuit for a transient simulation of saturation.