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fsw increase SVPWM - Coggle Diagram
fsw increase SVPWM
losses inverter
Switching losses increase
due to lower output voltage (for peak power) the current increases
higher conductionlosses
just lower currents possible due to higher losses
Maybe we can implement a DPWM to reduce sw. losses
Skin effects on bars?
EM losses
At field weakening we need more current
higher current dependet losses
current ripple decreases
current dependet losses decrease
For low speed it can be an opporrtunity due to lower innver voltage
Performance
will decrease on inverter side due to loeeses
Efficiency will decrease due to losses and lower output voltage at field weakening
DC-link voltage and current ripples in frequency range
Main frequency at about 2xfsw for SVPWM
depends on OEM requirements
time based voltage ripple will decrease
Output Voltage
reduction due to blanking and min impulse
at field weakening we need more current for the same power
less performance at same current
EM Insulation
lifetime reduction
control
increase max frequency
controllability for higher frequencies will be possible
what is the min. task time?
increase max. output frequency ==> enables higher pole pairs
faster EM
EMI