Abstract: The principles of the classic rotary Wimshurst machine, which produces dc high voltage ...
The principles of the classic rotary Wimshurst machine,
which produces dc high voltage by regenerative electrostatic
induction, are used to develop a new alternating high-
voltage machine. This device has no electrical inputs
but can spontaneously produce either dc or three-phase ac
high voltage, depending on external connections. The
machine constructed by the authors produces voltages in
excess of 18 kV which frequencies of operation up to 2 Hz.
Improved design can extend the voltage and frequency
operating ranges. Analysis is extended to include multi-
phase, multi-frequency operation by modeling the device
with a distributed equivalent circuit representation. The
natural frequencies of the system are calculated where it is
found that many overstable modes are present.