How does inductance value affect output voltage ripple?

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SUMMARY

The inductance value directly influences the output voltage ripple in power electronics. Higher inductance results in a smaller ripple, as indicated by the formula ΔIout=(Vin-Vout)⋅Ton/L. In continuous conduction mode, the relationship between inductance and ripple is governed by the inductor's ability to resist changes in current, described by the equation V=-L⋅di/dt. Understanding this relationship is crucial for optimizing power supply designs.

PREREQUISITES
  • Basic understanding of electrical engineering principles
  • Familiarity with continuous conduction mode in power electronics
  • Knowledge of inductance and its role in circuit behavior
  • Proficiency in analyzing waveforms and voltage ripple
NEXT STEPS
  • Study the impact of inductance on output voltage ripple in buck converters
  • Learn about continuous conduction mode versus discontinuous conduction mode
  • Explore the use of simulation tools like LTspice for analyzing inductor behavior
  • Research the effects of different inductor materials on performance
USEFUL FOR

Electrical engineers, power electronics designers, and students studying circuit analysis will benefit from this discussion on inductance and output voltage ripple.

Kasim
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Hi

What effect does the inductance value have on the ripple in the output voltage?
 
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Higher the inductance, smaller the ripple
 
Thanks

Can you explain what the reason is for this?
 
In continuous mode ΔIout=(Vin-Vout)⋅Ton/L
Waveforms for continuous mode:
smps-buck-switching-regulator-concept-05.gif


Generally speaking, inductivity is inert to change of current flowing through it.
 
Thanks, but what do you mean by inert?
 
Kasim said:
Thanks, but what do you mean by inert?
V=-L⋅di/dt
 
Thanks a lot
 

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