If on the stabilizer to give the changing input voltage, then the value of the same parameter at its exit will be almost invariable. It allows to feed various devices from sources with unstable parameters the price of some loss of efficiency.
Instruction
1. To make the ferroresonance power conditioner, take the transformer which primary winding without any negative consequences for itself maintains tension several times exceeding entrance. Consistently in it turn on the paper capacitor which capacity pick up experimentally so that the resonance frequency of the contour formed by this condenser and the primary winding was equal to the frequency of power line. The condenser also has to maintain tension several times exceeding entrance. It is connected with the fact that at resonance it considerably raises. Calculate secondary winding so that at it, the increased tension on the primary winding tension on secondary was equally demanded. Use such stabilizer only in alternating current mains and only on condition of stable frequency. Together with the generator equipped with DVS, such stabilizer will work very badly.
2. For production of the parametric stabilizer of constant voltage take the stabilizing element - gas or semiconductor stabilitron. Include the last in the return polarity as in straight line it opens as the normal diode. Consistently turn on the resistor which resistance calculate by formula: R=(Uвх-Uст) / (Ist +in), where UVh - the input voltage, Ust - stabilization tension, I - stabilization current which can be taken close to the load current, In - load current.
3. Take stabilitron calculated on maximum current it is not less than the sum of Ist and In. Calculate the power of the resistor by formula: P=(Uвх-Uст) (Ist +in). Before calculations transfer all units to the SI system, and results will turn out in it. Remove voltage output from stabilitron.
4. To make the compensation stabilizer of constant voltage, take chip 7805, 7806, 7809, 7812 or 7815, depending on what is necessary for you tension at the exit (respectively, 5, 6, 9, 12 or 15 V). Install it on the large heat sink. Take two oxidic condensers with a capacity of 1000 microfarad calculated on tension in 25 V. Minus conclusions of both condensers connect to the second conclusion of chip, positive conclusion of the first condenser - to its conclusion 1, positive conclusion of the second - to its conclusion 3. Parallel to each of oxidic condensers include on ceramic any capacity. Take source of the unstable tension exceeding demanded stable approximately on four volts. It connect ""Plus"" to conclusion of 1 chip, ""minus"" - to conclusion 2. From conclusion 3 remove positive pole of stable tension, from conclusion 2 - negative. The maximum output current for chips 7805 and 7806 is equal 3 A, for the others - 1.5 A. For chips with letters M and the more so in the middle of designation it is much less than L.