Chart
VFD harmonic mitigation option matrix
Compare line reactors, DC chokes, multi-pulse drives, passive filters, active filters, and active front ends for VFD harmonic planning.
Does not calculate harmonic distortion, prove utility compliance, select a filter, or replace a power-quality study.
mitigation matrix
Mitigation option tradeoff matrix
Use the matrix to move from symptom and drive count toward the right study or manufacturer conversation.
Highest THDi band; may need impedance or filtering.
Retrofit-friendly with limited harmonic reduction.
Targeted reduction that needs system and load-profile review.
Useful for tight targets, regeneration, or larger drive lineups.
Decision table
Show mitigation option tradeoffs before a power-quality study or drive specification.
Scroll sideways to keep row labels aligned with hidden columns.
| Method | Best fit | Watch point | Handoff |
|---|---|---|---|
| Line reactor | Basic input impedance and transient help | Limited harmonic reduction | Drive manufacturer data |
| DC choke | Integrated drive impedance option | Drive-specific availability | VFD product data |
| Passive filter | Known harmonic target at defined load | Resonance and tuning | Power-quality study |
| Active filter / AFE | Tighter harmonic or regenerative needs | Cost, controls, and system study | Utility/study review |
Notes
- Treat this chart as a planning and conversation aid only.
- Confirm current utility requirements, product markings, manufacturer instructions, and local authority requirements before field work.
- Use the linked calculator or table when the task needs project-specific arithmetic.
Source links
Open the underlying public sources before treating the chart as project guidance.