Inductor Current Ripple
(peak to peak) (3) amplitude can determine the inductor current ripple
value between peak to peak
The device operates with phase interleaving, which reduces input and output current ripple
, reducing the requirement for load capacitance.
05; %max acceptable current ripple
R=80; %ohm--load resistance, purely resistive assumed (j0) P=1/fs; %Second--switching period d=Vout/Vin; %unitless ration--duty ratio calculation Qgsw=20e-9; %MOSFET switching-point gate charge (Coulomb) Qg=175e-9; %MOSFET gate charge (Coulomb) il=0.
However, the analog 1 st-order RC filter does not completely reject the current ripple
due to PWM switching, so the final solenoid current signal is obtained after averaging several samples using logic embedded in the microcomputer.
This undesired phenomenon was improved by changing the Euler approximation of the predictive controller to the trapezoidal technique as shown in the right-hand side of Figure 6(c), which reveals in its amplification shown in Figure 6(d) that the trapezoidal predictive controller reduces the current ripple
amplitude by approximately 50%, increasing its frequency rate from 4.
The equation (1) describes the dependency of IVS current ripple
on the circuit parameters.
It is important therefore to discover and evaluate new DC/DC converters with fair low input current ripple
high efficiency low voltage stress over the power devices and soft-switching achievement [7-9].
The voltages induced in these small sense coils result from a combination of the PWM current ripple
and flux steering which occur by the interaction of the rotor and the stator magnetics.
2010)was based on analyze the main harmonic content in the power converter through the current ripple
injected to the source, and to develop a power conversion system able to filter the current harmonics generated during the converter switching, which is traditionally addressed by the typical capacitor-filtering solution (Jang, Won et al.
Time integral of this voltage vector is called stator flux ripple, which is a measure of the line current ripple
with the applied PWM strategy -.
The device helps increase system reliability by incorporating a unique 180 degree interleaving method, which reduces the amount of input and output current ripple
and distributes the magnetics to improve thermal management.
However, this reduction causes an increase in current ripple
per phase and a decrease in efficiency.