Abstract A solid-state power supply for transforming unregulated direct current electrical energy into regulated alternating current and/or direct current electrical energy. The power supply has a common collector, DC to AC inverter with a circuit for limiting the excursion of the inverter drive voltage to prevent saturation of the common collector power transistors. The power transistors in the inverter function simultaneously as power oscillators and as series regulators. A shunt regulator is connected to a pair of diodes which in turn are connected to the power transistors for controlling the excursion of the base drive voltage. The inverter is connected to a transformer which provides one or more regulated AC outputs. Rectifier-filter circuits may be connected to the output of the transformer to provide regulated direct current electrical energy. A feedback network is connected from the output of the inverter to the shunt regulator to control the limiting voltage of the shunt regulator.
A solid-state power supply for converting unregulated direct current electrical energy into regulated electrical energy comprising: a transformer with a pair of primary windings; a pair of nonsaturating transistors having load paths connected together across one of said windings and bases connected together across the other of said windings; a zener diode with a first end connected to a common ground and with an opposite end; and, a pair of diodes having second ends connected together to said opposite end of said zener diode and third ends connected directly to said bases, said diodes limiting the maximum drive voltage of said bases to a voltage provided by said zener diode.
Claim 2
Dependent Claim
110 words
A solid-state power supply for converting unregulated direct current electrical energy into regulated electrical energy comprising: a transformer with a pair of primary windings; a pair of nonsaturating transistors having load paths connected together across one of said windings and bases connected together across the other of said windings; a zener diode with a first end connected to a common ground and with an opposite end; and, a pair of diodes having second ends connected together to said opposite end of said zener diode and third ends connected directly to said bases, said diodes limiting the maximum drive voltage of said bases to a voltage provided by said zener diode.
Claim 3
Dependent Claim
45 words
The power supply of claim 1 wherein: said transformer has a maximum of two primary windings; and, said transistors have emitters connected together across one of said primary windings and collectors connected directly together, said bases are connected across the other of said primary windings.
Claim 4
Dependent Claim
48 words
The power supply of claim 2 wherein: said primary windings have center tap terminals connected together through a first resistor and capacitor connected together in parallel arrangement; and further comprising: a second resistor connected between said collectors and said center tap terminal of one of said primary windings.
Claim 5
Dependent Claim
25 words
The power supply of claim 3 wherein: said first end of said zener diode and said third ends of said pair of diodes are anodes.