IEEE 390-1986 (R2007) pdf free.IEEE Standard for Pulse Transformers.
IEEE 390 pertains to pulse transformers for use in electronic equipment.For the various types of thesetransformers, the peak power transmitted ranges from a few milliwatts to kilowatts; and the peak voltage transmittedranges from a few volts to many kilovolts.
These transformers are required to transmit unipolar or bipolar pulses of voltage or current within specified tolerancesof amplitude and time when operated between specified impedances. They are typically used as coupling devices inelectronic circuits. In blocking oscillators, they are connected to provide positive feedback in the circuit. n radar orsimilar use, they are used to couple the modulator to a magnetron, a klystron, a traveling-wave tube or a cross-fieldamplifier 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.
This standard shall be used in conjunction with the following publications:
[1]ANSIIEEE Std 100-1984,IEEE Standard Dictionary of Electrical and Electronics Terms.
[2] ANSI/IEEE Std 111-1984,IEEE Standard for Wide-Band Transformers.
[3] ANSIIEEE Std 260-1978(R 1985),IEEE Standard Letter Symbols for Units of Measurement (Sl Units,Customary Inch-Pound Units and Certain Other Units).
[4]ANSI/IEEE Std 268-1982,American National Standard for Metric Practice.
[5]ANSIIEEE Std 280-1985,IEEE Standard Letter Symbols for Quantities Used in Electrical Science and ElectricalEngineering.
[6]ANSIIEEE Std 315-1975(CSA Z99-1975),IEEE Graphic Symbols for Electrical and Electronics Diagrams.
[7]ANSIIEEE Std 315A-1986, IEEE Standard—Supplement to Graphic Symbols for Electrical and Electronics Diagrams.
Electrical terms used in this standard shall be in accordance with those given in IEEE Std 194-1977 [10]and ANSLIEEE Std 100-1984 [1]. In addition, a number of terms are defined in this section; however,ANSIIEEE Std 100-1984[ 1 ] shall take precedence in the case of any conflict.
peak working voltage: The maximum instantaneous voltage stress that may appear under operation across theinsulation being considered, including abnormal and transient conditions.
input pulse shape:Current pulse or source voltage pulse applied through associated impedance.The shape of theinput pulse is described by a current- or voltage-time relationship and is defined with the aid of Fig 1 in accordancewith the following definitions.
pulse amplitude, Aw:That quantity determined by the intersection of a line passing through the points on theleading edge where the instantaneous value reaches 10% and 90% of Aw and a straight line that is the best least.squares fit to the pulse in the pulse-top region (usually this is fitted visually rather than numerically). For pulsesdeviating greatly from the ideal trapezoidal pulse shape, a number of successive approximations may be necessary todetermine AM.IEEE 390 pdf download.