PUSH - PULL
When it comes to power
conversion, the buck boost or "push-pull"
transformer application is well known. The
buck boost transformer configuration is
widely used in converting direct current
(D.C.) voltage into another value of D.C.
voltage, and in inverters. Inverters convert
direct current into alternating current
(A.C.). The push pull transformer is usually
the preferred choice in high power switching
transformer applications exceeding one
kilowatt. It is usually used in a circuit
known as a "forward converter" circuit. Be
aware that the name for the "forward
converter" circuit varies from industry to
industry and from person to person. It may
also be referred to as an "inverter", "D.C.
converter", "buck", "feed forward", and
others. A basic "forward converter"
transformer circuit is not a push pull
transformer application. The output inductor
reduces ripple voltage. Pulse width
modulation is used to control the value of
the output voltage
A center-tapped buck boost transformer
application circuit can be designed with a
single or multiple outputs. Multiple voltage
outputs are possible by using either a
tapped secondary winding or using multiple
The buck boost transformer operation requires more switching
elements and its control circuitry is more complicated.
Consequently a push
pull transformer application is more expensive.
The voltage pulses must be adequately controlled to
avoid phenomena known as saturation walk. Center tapped
push pull transformers have winding capacitance issues
at higher frequencies. Winding imbalances can contribute
to saturation walk.
manufactures electronic transformersand buck boost “push-pull”
transformers in a wide variety of shapes and sizes.
This includes; various standard types of “core with
bobbin” structures (E, EP, EFD, PQ, POT, U and others),
toroids, and some custom designs. Our maximum weight
and power limitations are 40 pounds of weight and 2
kilowatts of power. We have experience with foil windings,
litz wire windings, and perfect layering. For toroids,
special winding techniques such as sector winding, progressive
winding, bank winding, and progressive bank winding
can be accomplished to satisfy your dielectric, creepage
distance, capacitance, and leakage inductance requirements.