Standard 390-1987

IEEE Standard for Pulse Transformers

Working Group Chairman: Charles Elliott

Phone: 613-673-4657
email: cjelliot@nortel.com

Status: Reaffirmed 1993

Scope:

This standard pertains to pulse transformers for use in electronic equipment. For the various types of these transformers, the peak power ranges from a few milliwatts to kilowatts; and the peak voltage transmitted ranges from a few volts to many kilovolts.

These transformers are required to transmit unipolar or bipolar pulses of voltage or current within specified tolerances of amplitude and time when operated between specified impedances. They are typically used as coupling devices in electronic circuits. In blocking oscillators, they are connected to provide positive feedback in the circuit. In radar or similar use, they are used to couple the modulator to a magnetron, a klystron, a traveling-wave tube or a cross-field amplifier load.

Whenever numerical values are indicated in this standard, they may be considered as recommended values. Section 6 describes the preferred transformer test methods and Appendix A contains alternate test methods.

The tests described in this recommended practice include those most commonly used in the electronics transformer industry: electric strength, resistance, power loss, inductance, impedance, balance, ratio of transformation and many others used less frequently.

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