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The above figures depict a power supply using primarily magnetic means for generating a DC output from a three phase input line source.
English (United States)
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Controlled Double Bridge Power Supply
The above figures depict a power supply using primarily magnetic means for
generating a DC output from a three phase input line source.
In Fig. 1 the three phase input line AC voltage is fed into a three phase
magnetic amplifier. The output from the magnetic amplifier is fed to a three
phase power transformer. The output from the transformer is rectified by a bank
of rectifiers, and a DC output is generated. A control signal is taken from the DC
output and fed to a feedback amplifier, which has a reference diode
interconnected to one of its input legs, and the output of this amplifier is fed back
into the three phase magnetic amplifier.
In order to obtain a relatively low ripple voltage with zero or
near zero capacitance on the output DC signal, the secondary winding
of the power transformer must be connected in a six-phase connection.
In Fig. 2, the six-phase connection can be achieved by a delta wye
combination positioned on the secondary side of the transformer or a
zig-zag configuration. The primary winding of the transformer may be
connected in either a delta or a wye configuration.
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