90Vrms voltage regulator

Posted on Jul 27, 2012

The circuit is an open loop rms voltage regulator that will provide 500 watts of power at 90 V rms with good regulation for an input voltage range of 110-130 V rms. With the input voltage applied, capacitor Cl charges until the firing point of Q3 is reached causing it to fire. This turns Q5 on which allows current to flow through the load. As the input voltage increases, the voltage across R10 increases which increases the firing point of Q3. This delays the firing of Q3 because Cl now has to charge to a higher voltage before the peak-point voltage is reached.

90Vrms voltage regulator
Click here to download the full size of the above Circuit.

Thus the output voltage is held fairly constant by delaying the firing of Q5 as the input voltage increases. For a decrease in the input voltage, the reverse occurs.

Leave Comment

characters left:

New Circuits



Popular Circuits

VHF/UHF Wideband Portable Dipole
80x32 LED matrix display
Sequential timer
Updated 60-100W Hi-Fi Power Amplifier
Honda Motorcycle CB400 (Hawk II) Wiring Diagram
H-Bridge Motor Driver using MOSFETs and Transistors
silicon fuzz
infrared or ultrasonic
laser controlled on off switch
emf probe with meter
Electronic Lockers
RF amplifier and filter for 10.7 MHz
Reducing the power consumption of the circuit diagram ISO103