Analog power supply units with Power-Mos rectifiers
PM quattro
PM quattro
Analog power supply unit with 4 Power-Mos rectifiers, parallel or series use of the 4 rectified input-voltages by switches, mode low: 2x2,5A output (0-14V), mode high: 2x1,25A (0-30V),(when the difference between the input voltage to the output voltage becomes too small, the in-operation LED begins to blink), big load capacitors, no output ripple, no hf-problems, very low-drop control-loop, utilizing the input voltages in idling phase (mode low: Unmuffled 2x18V=/ 2x0,5A and 2x12V~ transformer voltage!), potential-free external activation (2,5-5V for 0-30V output) via SUB-D-front-connector or intern steering by 1poti for both outputs, exclusive use of readily available components
PM duo
2 Power-Mos rectifiers, mode low: 1x2,5A output (0-14V), mode high: 1x1,25A (0-30V)
Discussie (3 opmerking(en))
DE0178455ID 2 jaar geleden
this project is now an old project.
I wanted to upload a circuit-sheet for You.
Unfortunately it was not possible.
I am working on a quite new project.
Thanks for Your proposuals
All the best
Wolfgang
Musitron 2 jaar geleden
Or you have two independent power suppies which can be connected in series or in parallel with the switches, if you connect them in parallel i would recommend a current balancing circuit (from the measured load currents) two share the currents between the two sources ( optimized concept).
I would propose to use after the 50 Hz Transformer with ideal bridge rectifiers a stepup converter (switched Power supply, see https://de.wikipedia.org/wiki/Aufwärtswandler
). For Low output voltages, the switch transistor Mosfet is disabled and the analogue regulated power supply is fed with the rectified voltage. If we need higher output voltage, seen on the differential voltage on the series analoge transistor, you start switching the Powerfet of the stepup converter with duty cycle corresponding to the higher output voltage.
The generation of the PWM for this Mosfet dependent on choosen output voltage and differntial voltage of the analogue power regulator can be generated with an arduino UNO microcontroller with ADC inputs and PWM output. The equation for the PWM is implemented in the micro as well. Update rate of PWM in the area of some ms should be enough.
Wolfgang.Schubert 9 jaar geleden