 |
157 - Analysis of Eddy Currents in an IPM Motor Using the Gap Flux Boundary
|
Module:DP,FQ |
2011-01-17 |
The eddy current loss of magnets cannot be ignored with the increasing
use of highly conductive magnets as well as the need for faster and smaller
motors. One way to decrease the eddy current loss is to use divided magnets.
Ways to reduce the eddy current loss by dividing magnets can be examined
using analyses.
This example presents the use of a magnetic field analysis to obtain the
variations of eddy current loss in magnets by the number of divisions using
the gap flux boundary condition. The analysis results can be obtained more
efficiently reducing the time required for the standard transient response
analysis by using the gap flux condition.
|
 |
156 - Segregation Analysis of Torque Components for an IPM Motor
|
Module:DP |
2011-02-28 |
IPM motors are increasingly used in applications such as air conditioners
and automobiles because they can utilize both reluctance torque and magnet
torque. Generally, equation (1) is used to segregate the magnet torque
and reluctance torque of an IPM motor.
The torque can be segregated by obtaining the inductance from equation
(1). However, the effect of the magnets/current on the magnetic circuit
cannot be visualized. This note presents the use of a magnetic field analysis
to segregate the torque and obtain the magnetic circuit produced by each
type of excitation force.
|
 |
139 - Magnetic Resonance Analysis
|
Module:FQ |
2011-07-12 |
Recently, the magnetic resonance type of transmission is gaining attention
as a wireless transmission technology. Magnetic resonance allows transmission
very efficiently from a distance of several meters and the axes of the
transmission end and receiving end of the coils do not need to be aligned,
which differs from the conventional electromagnetic induction type transmission
that is widely used today. Investigating the coils via analysis is advantageous
because an optimal design for the coil geometry and circuit for the frequency
to use is necessary to transmit from the transmission coil to the receiving
coil using resonance.
This example presents the use of a magnetic resonance analysis to obtain
the transmission efficiency and magnetic flux density distribution for
the magnetic resonance by changing the distance between the coils.
|
 |
102 - Magnetic Field Analysis of a Magnetic Sensor
|
Module:ST |
2011-01-17 |
Magnetic sensors are used as highly durable and reliable open/close switches
to meet the current demands for a variety of electrical equipment and home
appliances.An open/close switch combines a detection component and magnet
to detect a position using the magnetic flux variations when the information
is accessed by the detection component.Selecting the appropriate detection
component and magnet as well as evaluating the be arrangement is necessary
during the design stage to obtain highly sensitive and accurate location
detection.This example presents the use of a magnetic field analysis to
evaluate the magnetic flux density distribtion in both the horizontal and
perpendicular directions of a magnet.
|
|
