Pulse Transformer
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Pulse transformer
The pulse transformer is a kind of broadband transformer. For the communication transformer, nonlinear distortion is a very important indicator, so request transformer work in the initial permeability of core, so that even if like input transformer, power transformer is very small, appearance also have to obtain considerable. In addition to want to consider the frequency characteristics of transformer, how to reduce the loss is a concern.
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Similar structure and general control of pulse transformer transformer, by conducting winding constitutes the core of pulse transformer and the permeability of the core part. Make it ring, but the vast majority of pulse transformer core material for permalloy commonly or manganese zinc ferrite magnetic porcelain, etc.; Its third winding is bilateral and trilateral, winding is generally set to improve some performance, winding characteristic is by changing the vice winding around always change the polarity of the output pulse signal. [1]
The main purpose
Pulse transformer is widely used in radar, transformation technology; Load resistance and feeder line characteristic impedance matching; Raise or lower pulse voltage; Change the polarity of the pulse; And primary circuit isolation transformer secondary circuit application several secondary windings in order to obtain phase relationship; Isolated power supply part of the dc component; In the transistor (or tube) pulse oscillator electrode (anode) and the base for a strong coupling between (grid); Using a number of secondary windings in order to get a few different amplitude of the pulse, make the tube plate circuit and gate circuit, or with the base in the collector of a transistor is formed between the positive feedback, so that the self-excited oscillation; As the power synthesis and transformation components etc.
All the basic principle of the pulse transformer and ordinary transformer (such as audio transformers, power transformers, power transformers, etc.) is the same, but in the core of the sense there's a difference between the magnetization process, analysis is as follows:
(1) pulse transformer is a work in the transient transformer, that is to say, in a short time pulse process, is a square wave, smooth tops and ordinary transformer is working in continuous constant magnetization, the alternating signal by the sine waveform changes.
(2) the pulse signal is repeated cycles, certain interval, and only the positive or negative voltage, and alternating signal is repeated in a row, has both positive and negative voltage value.
(3) pulse transformer required waveform transmission without distortion, which would require the leading edge of the waveform, roof fall are as small as possible, however, these two indicators are contradictory.
The pulse transformer is a kind of broadband transformer. For the communication transformer, nonlinear distortion is a very important indicator, so request transformer work in the initial permeability of core, so that even if like input transformer, power transformer is very small, appearance also have to obtain considerable. In addition to want to consider the frequency characteristics of transformer, how to reduce the loss is a concern.
]
Similar structure and general control of pulse transformer transformer, by conducting winding constitutes the core of pulse transformer and the permeability of the core part. Make it ring, but the vast majority of pulse transformer core material for permalloy commonly or manganese zinc ferrite magnetic porcelain, etc.; Its third winding is bilateral and trilateral, winding is generally set to improve some performance, winding characteristic is by changing the vice winding around always change the polarity of the output pulse signal. [1]
The main purpose
Pulse transformer is widely used in radar, transformation technology; Load resistance and feeder line characteristic impedance matching; Raise or lower pulse voltage; Change the polarity of the pulse; And primary circuit isolation transformer secondary circuit application several secondary windings in order to obtain phase relationship; Isolated power supply part of the dc component; In the transistor (or tube) pulse oscillator electrode (anode) and the base for a strong coupling between (grid); Using a number of secondary windings in order to get a few different amplitude of the pulse, make the tube plate circuit and gate circuit, or with the base in the collector of a transistor is formed between the positive feedback, so that the self-excited oscillation; As the power synthesis and transformation components etc.
All the basic principle of the pulse transformer and ordinary transformer (such as audio transformers, power transformers, power transformers, etc.) is the same, but in the core of the sense there's a difference between the magnetization process, analysis is as follows:
(1) pulse transformer is a work in the transient transformer, that is to say, in a short time pulse process, is a square wave, smooth tops and ordinary transformer is working in continuous constant magnetization, the alternating signal by the sine waveform changes.
(2) the pulse signal is repeated cycles, certain interval, and only the positive or negative voltage, and alternating signal is repeated in a row, has both positive and negative voltage value.
(3) pulse transformer required waveform transmission without distortion, which would require the leading edge of the waveform, roof fall are as small as possible, however, these two indicators are contradictory.
