In this paper, new experimental results for detecting,
I2 and
Te are reported using a magnetic-field sensor which is constituted with some amorphous microcores operating in a stake multivibrator followed by a low-pass filter.
The output of the Sensor with eight pair of micro cores (
Eout) is proportional to
I2. The
Eout has not only a voltage component of the frequency
f but also components of frequency
sf,
fn-
sf,
fn+
sf and others when a sensing with only one pair of microcores, where
sf is a slip frequency,
fn is a rotor speed requency,
f (1-s)/2. It causes the components
fn±
sf that the rotor performs a precession motion. The voltage component of the
fn-
sf was proportional to
Te.
A calculated torque (
Tm) using the measured value of
I2 almost coincieds to a measured torque (
Te) using a DC generator which is a load of IM.
抄録全体を表示