| Abstract |
Usually, adjustable speed drives consist of an electrical machine being fed via a converter with the
appropriate voltage, current, frequency and the power required by angular speed times torque and the
losses. This new concept of an electromagnetic gearing provides speed adjustability in fine steps,
includes also the function of a clutch and allows a variation of torque and speed independent of the
power delivered to the electromagnetic coupling device. The mechanical coupling is accomplished by
magnetical forces which can be influenced by a converter controlled excitation system consisting of a
high number of individually controlled coils. This paper explains the functional principle and the test
on a special test bench and presents the method of calculating the torque respectively the peak value of
torque transferability with respect to the displacement between the magnetic poles. The power
electronics and converter control realisation is described as well as the measuring equipment necessary
for evaluation of this new principle. The first measurement results at the test bench are shown. |
