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Re: Unknown behaviour of differential amplifier for high side current sensing
Thank you everyone.
I have changed by design and implemented current sensing using INA180, that are high side current sense amplifiers able to tolerate common-mode voltages up to +26 V.
I still don't understand why...
Unknown behaviour of differential amplifier for high side current sensing
Dear Experts,
To fulfill the objective of high side current sensing, I am evaluating a differential amplifier operating from a 5V single supply.
The current is being sensed for a performing MPPT for a Solar battery...
Hello Experts,
We were planning to design a solution that needs support of Embedded Linux/ucLinux. Initially we had thought of using RPi Zero in the solution, however it has a controlled distribution and will not be available in bulk quantities to be used for products that will need to be mass...
Dear all,
I need to design a hybrid charge controller that functions off a Solar PV and the Grid, while prioritizing the Solar Power.
The specs are as follows: Vmpp = 18V, Impp = 3.5A.
Target Battery is a 12V/26Ah battery, that is used to power up a load consuming 2A continuously.
The...
Dear everyone,
Thanks for all your inputs.
I was able to get my hands on an Isolated DSO, and was able to probe Vgk, Vo and Vin simultaneously. As FvM pointed out, the SCR was not getting triggered because the pulses were not being generated.
Upon further investigation, it was found that the...
I'm not having access to an isolated scope to record the waveforms to measure Vgk on the high side and the output accross the semiconverter simultaneously.
Any way to go around it?
Attached are the connections after the schematic in post #1. There is a resistive load connected to fulfill the latching current requirement of the SCR because there is heavy inductive loading. The sanctioned load is 4 ohms but the system also has to operate on 10% load for which the tests have...
Hi KlausST, I've measured the gate loop and have reported the readings. The input to the rectifier was 120Vrms and the connected load was a 40-ohm heater.
The firing problem lies only in the 90 degress +/- 10 degrees case. The triggering is proper in the other regions. Can you tell why there is...
Thanks. But the RMS gate current is close to 200 mA, as measured by a multimeter. Do you still think that the MOSFET is not being sufficiently turned on?
- Rachit
Dear experts,
I'm working on a firing angle controller to trigger Semikron's SKCH40/12 Semi-controlled rectifier. Attached is the firing scheme used to trigger the module. The pulse transformer used is a Rp4503 type pulse transformer.
1. At first, the firing scheme was such that a 500 us...
Hi,
Depends on what will be the operating frequency of your Power Supply. You will need to estimate the required time to execute your control equations along with sensing. A dsPIC will be an option I'd not prefer if the switching frequency is > 25 kHz. Mainly due to the limited processing...
Hello Experts,
I am building a Full Bridge DC-DC Converter with the following ratings:
Vin: 150V
Iin: 10.5A
fs: 35kHz
I'm having problems in selection of the MOSFETs. How do I derate the MOSFETs and operate it in the SOA on the basis of high frequency operation?
I couldn't find any plots of...
It looks like some of the elements in the circuit are floating, due to which there is a short circuit because of switches turning on when they should not...
The H-Bridge is very easy to operate if the firing logic is correct. Posting any schematics should make things clear to troubleshoot.
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