C-Motive Technology Talk (Provided by Tom Kaminski)
Justin Reed presented an interesting talk on use of an "old"
concept with a new twist. The "old" concept is
capacitive couplers. The new twist, is fluid dynamic air
bearings to maintain precise separation of capacitive
plates. He also brought along demonstration devices to
illustrate the concepts and in the process, generated a lot of
discussion. C-Motive has developed a core concept of a
rotating, self aligning, capacitor that can be used to
transfer power, both electrical or mechanical. The
C-Motive power coupler maintains a very precise and tight gap
using fluid dynamics to hold the precise spacing needed for
high capacitance. The rotary capacitor can be
used to either couple power or to act as an arc suppressor for
induced high frequency currents that erode motor
bearings. The motor bearing protection device is a
low-cost, but potentially very high volume market.
It is needed where Variable Frequency Drives are applied to
motors, causing high-frequency leakage induced arcing.
C-Motive is also working on a high-torque capacitive
motor/generator that uses the fact that you can vary a plate
pattern and change the capacitance of the plates as they rotate,
causing a current to rush in or out when attached to a fixed
voltage bus. It requires force to rotate the capacitor
plates -- applying mechanical input produces electrical energy
output. Applying electrical energy in changes the
force, producing mechanical work.