Glossary of Terms Power Transformer

Glossary of Terms:

Bracket:
Method of attaching unit to panel chassis which does not provide any electrical connections.

Core Geometry:
Style or type of core structure. Core geometries have been developed for use in different circuit applications.

EI Laminations:
A core structure that is made of usually silicon steel metal pieces shaped like “E’s” and “I’s”.

Ferrite E Core:
An “E” shape structure made from dense, homogeneous ceramic materials made by mixing iron oxide with oxides or carbonates of one or more metals such as manganese, zinc, or magnesium. An E-core transformer requires two core pieces per transformer.

Ferrite Toroid:
A doughnut shape structure made from dense, homogeneous ceramic materials made by mixing iron oxide with oxides or carbonates of one or more metals such as manganese, zinc, or magnesium.

Frequency:
Frequency at which transformer will operate

HIPOT:
Maximum isolation voltage from winding to winding(s) or winding to core / ground.

Hipot Duration:
Length of time in seconds to test device at the hipot voltage.

Input Voltage(s):
The voltage applied to the primary winding

Mounting:
The method used to mount the component to the circuit board.

Number of Primaries:
Number of primary windings. Indicate if center tapped.

Number of Secondaries:
The number of secondaries required in the transformer.

Output Current:
Output current expected to flow through secondary winding(s) under fully loaded conditions.

Output Voltage(s):
Output voltage expected from secondary winding(s) under fully loaded conditions.

Powder Core Toroid:
A doughnut shaped structure designed to have distributed air gaps within its shape made from ferrous alloy powder which result in low losses.

Power Rating:
Maximum power transformer is expected to process

Sine Waveform:
A signal that varies with time as per the sinusoidal trigonometric function.

SMT Mounting:
Components manufactured with solder feet that are soldered to pads on the circuit board providing the mounting and connection to the circuit. Electrical connection is made through soldering the component to these solder pads.

Square Waveform:
A signal made by switching between two voltage at a constant frequency.

Thru Hole Mounting:
Component manufactured with pins that mount the device through holes in the circuit board which are soldered making the electrical connection to the circuit.

Turns Ratio:
The number of primary turns to the number of secondary turns expressed as Np:Ns.

Waveform:
Type of signal that is applied to the input terminals of the transformer.

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