 |
131 - Stray Capacitance Analysis of a Motor
|
Module:EL |
2011-02-28 |
AC motors that drive PWM inverters are widely used in household appliances.Motors
used for PWM inverter power supplies are known to produce shaft voltage
which reduces the reliability and life span of the motors.It is advantageous
to investigate the stray capacitance using an analysis in advance because
the shaft voltage is produced by the stray capacitance of the motor.This
example presents the use of an electric field analysis to obtain the stray
capacitance between the IPM motor's coil and stator core, rotor core and
stator core, and inner and outer rings of the bearing.
|
 |
73 - Analysis of Capacitance of a Parallel Plate Capacitor
|
Module:EL |
2011-02-28 |
Two electrode plates are modeled and arranged in parallel, which has the
basic structure of a capacitor. When the different electric potential is
constantly applied to each plate, electric charge stored in the electrode
plates varies with the relative permittivity of the dielectric material
between the electrode plates. This note presents the use of magnetic field
analysis to obtain the electric charges of both the air and the high permittivity
material when they are placed between the electrode plates, and calculate
the capacitance.
|
|
