Figure 9 illustrates an example plot of
inrush current with respect to instantaneous input supply voltage applied, with zoomed inrush profile data which is analyzed for peak
inrush current.
The excitation current increases sharply and forms magnetizing
inrush current where amplitude [i.sub.p] may be up to 6-8 times the rated current.
Having in mind that the
inrush current is a stochastic variable dependent upon uncertain parameters, the algorithm has been tested by signals obtained in two different ways.
Calculation of
inrush current with a neutral resistor
NEMA Premium sets standards for temperature, torque,
inrush current, power factor and overall design parameters.
The PWR-01 also is equipped with a soft-start function that limits the
inrush current, minimizing any harmful effects to DUTs such as DC motors.
Current transformer saturation caused by the long-lasting
inrush current can decrease the second harmonic content, potentially causing the second harmonic restraint algorithm to fail [8-10].
* ASGATE FET control, which actively controls
inrush current to prevent FET damage.
5X thinner than traditional 1U power supplies, Vicor's PFM AC-DC converters integrate system functions including EMI filtering, transient protection and
inrush current limiting to reduce design time and design risk.
The waveshape, magnitude and duration of the transformer magnetizing
inrush current are dependent on several factors, among them are the remanent flux and initial phase of the voltage at the instant of switch-on [13],[16].