Abstract
Impulse excitation of the tuned primary circuit of a Tesla transformer generates a voltage and current response in the similarly tuned secondary circuit that contains both a fundamental component and a series of multiple higher-order modes. This paper investigates the most significant of these modes, in order to demonstrate a design approach that, when applied to the secondary winding, can bring about a reduction in the higher-order modes without significantly affecting the fundamental term. The resulting process leads to an improved spectral purity of the transformer output, making it better suited than existing conventional designs for application in electronic warfare and other high-power systems.
Highlights
A wide range of experimental topics in both physics and engineering requires extremely fast rising pulses with amplitudes greater than 100 kV. This is frequently provided via the use of a Tesla transformer (Glascoe & Lebacqz, 1948; Serjeant & Dollinger, 1989), which transfers energy from a low impedance primary circuit to a higher impedance secondary circuit to bring the voltage of the secondary circuit to the much higher value required by a typical load
The underlying concepts were clearly presented over a hundred years ago, the Tesla transformer still plays a vital role in meeting important pulse generation requirements in technically active countries worldwide
Design techniques used in helical cavity filters have been explored and applied to Tesla transformer secondary coils
Summary
A wide range of experimental topics in both physics and engineering requires extremely fast rising pulses with amplitudes greater than 100 kV This is frequently provided via the use of a Tesla transformer (Glascoe & Lebacqz, 1948; Serjeant & Dollinger, 1989), which transfers energy from a low impedance primary circuit to a higher impedance secondary circuit to bring the voltage of the secondary circuit to the much higher value required by a typical load. At a fundamental resonant frequency f1 the spatial difference between the conditions at the two ends of the winding must be a quarter of the resonant wavelength (λ/4) and all of a series of odd multiples thereof This gives rise to a standing wave along the coil, which contains a series of related wave-lengths for which the equivalent electrical lengths of the coil are: λ/4 3λ/4 5λ/4......
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