Recent content by Bakez

100ns pulse

If I have a pulse generator what is the current it can output? It doesn't say in the datasheets IF I have a 5V pulse and 50ohm output impedence am I supposed to believe it outputs 100mA? And then if my load is 1ohm I should get something near 100mA through it?

Actually there is no problem realising this inductor. I have one for 20A DC and 6.5mH - it weighs about 10kg. I don't need it to fit on my board. Actually it is great as I can increase my DC voltage from 500V to perhaps 750V or more and the controller will still work fine - the MOSFETS are...

OK thanks for your help. I have managed to get the inductance down to about 2mH @ 2.5kHz with an acceptable waveform. Any lower and the output current goes much higher than the reference, even though when simulating in MATLAB with just the transfer functions, the step response is still fine (I...

Thank you for your help. This circuit is actually being built to test the efficiency of SiC MOSFETS. The test setup is supposed to emulate one leg of a 3-phase converter in a wind turbine application. The inductor is just being used as the load so I can draw the correct current from the test...

OK I was beginning to think this. I will have to ask some more people tomorrow. What I mean by a smooth curve is this what I have attached. Two pics of the current through the load inductor, both at 2.5kHz switching frequency and the controller has a reference current of 50Hz 15A RMS (green...

Hmm yes I have been trying to use that calculator, I was recommended it. But it keeps saying that there is no core large enough for my application. I need to design an inductor so that I have the exact values to simulate in my controller I will be putting AC current through my inductor...

I think I have simulated my controller with ideal switches and an inductive load in LTSpice. I have 500V DCLink voltage, 50Hz 15A RMS through the inductive load and the switching frequency is 2.5kHz. Now I have to make an inductor close to the value I used in LTSpice (3.55mH, 2.9mOhms) and then...

No its just an inductive load, I'm using it to simulate one leg of a full 3 phase inverter so I can test the efficiency of the MOSFETs I think I have done the transfer function and the controller. The transfer function was the load and the gain of the bridge (Vdc) and an exponential term for...

I know how I am supposed to control the sinusoidal current through the load. I leave the DUT switch duty cycles in open loop and I have to control the PWM to the control switches in order to regulate the difference between the two legs. What I don't understand is how to make the PI controller...

I have a single phase DC-AC inverter (or H-Bridge) with an inductive load I want to design a controller that controls the PWM signals to the control side switches that will ensure there is a sinusoidal current through the load. I need to use PI control and implement into a DSP so it has to be...