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LCC Compensation

Engineering reference on LCC Compensation for wireless power system design, integration, and deployment.

6 minArticle 07/16Resonant WPT

LCC Compensation — educational diagram — Fig.: Educational diagram for “LCC Compensation”.

LCC compensation adds an inductor and two capacitors arranged so the primary (and often the secondary) presents a well-behaved resonant filter. A common primary LCC makes the coil current relatively insensitive to load in a designed band — closer to a current-source drive of the magnetic link.

01Why industry likes LCC

Flatter power/gain curves across a practical k window.
Easier inverter current shaping and ZVS planning than bare SS in some power classes.
Secondary LCC can simplify rectifier voltage stress and battery charging profiles.
Mature analysis literature for EV and industrial WPT.

LCC Compensation — supporting diagram — Fig.: Supporting illustration for “LCC Compensation”.

02Cost of the extra parts

Extra magnetics and film capacitors add volume, loss, and BOM cost. Parameter drift and tolerance stack-up matter. LCC pays off when docking scatter is real and you need predictable pad current; it is overkill only if the mechanical alignment is already near-perfect and the power class is tiny.