Mohamad Sayadi

9 Questions 5 Answers 0 Followers

Questions related from Mohamad Sayadi

Why a half-bridge resonant converter is not working?

Dear Reader This unit is about 2500Watt based on half-bridge resonant topology (Ath1). The controller IC is NCP1399AM. SR stage handled by SRK2001. PFC output: about 400volt generated by...

02 July 2020 1,739 0 View

What element could be an alternative for diode PKC-136?

This diode is used in primary winding of a SMPS. Unfortunately, this element failed and only can help to produces a small fraction of full voltage at output (≈10V instead of 24V) and the whole...

14 September 2019 4,449 3 View

How can I configure thermistor T120K for calculating the temperature?

The attached picture shows a thermistor with its safety breaker circuit which is common at electrical domestic appliance. I appreciate anyone could help me for finding the curve (temperature vs...

25 August 2019 7,252 6 View

How a magnetron’s parameters could be estimated?

For designing ZVS high voltage resonant power supply which driving a magnetron, that generally comes in microwave home appliance, knowing the key parameters such as breaking voltage in V-I...

24 May 2019 8,866 0 View

Is it possible a doctoral thesis defined by myself?

I was graduated as Master of Science in field of electronic engineer. I have an idea about developing a measurement device (Coriolis flow meter) and I am going to realize it. Because this...

11 September 2018 9,409 4 View

How does diapason’s fork resonate? Is this phenomenon same as vibration on inner tube in a Coriolis flow meter?

I have recently repaired a Level Limit Switch (Endress+Hauser) that consist of these three main parts (attached picture): 1. Sensor (Diapason) 2. FEM 37 3. FTL325P But I didn’t understand...

01 May 2017 5,928 0 View

Finding a transformer for a power supply switching.

There is a switching power supply on the Ferroli boiler (attached pics). The transformer failed to produce appropriate voltage on the secondary sides. I have no idea about the specifications of...

01 January 1970 8,917 6 View

Analytical model of a leakage transformer

When a transformer has coupling factor less then one and leakage inductance on both sides, what could be the best circuit model that represent all nonideality? The transformer (attached picture)...

01 January 1970 5,929 0 View

Finding the end of resonance in quasi-resonant zero voltage switching inverter (attached figure)

Finding the end of resonance in quasi-resonant zero voltage switching inverter (attached figure) I would be grateful if anyone could help me for suggesting a system/or circuit that determines the...

01 January 1970 2,474 1 View