==== LTspice IPT simulation ====

Below fogure shows a LTspice schematic of a SS IPT system.

{{ :ltspiceipt5.png?nolink&600 |}}

To mimic the source, the pulse function is used. This will give a bipolar square wave with a frequency of 20 kHz. When the simulation was originally run, there was a slight difference between the simulated results and the reported results. This is because LTspice does not automatically takes ESR, copper losses, etc into account. Below figure and tablev how the simulated results rounded to two decimals. The rounded off values are not used in calculations.

{{ :ltspiceipt6.png?nolink&600 |}}

{{ :screenshot_2025-06-22_163226.png?nolink&600 |}}

To calculate above values, following code in LTspice is used:

//.meas TRAN Vin RMS V(n001)

.meas TRAN Iin RMS I(R1)

.meas TRAN Irms RMS I(RL)

.meas TRAN Vrms RMS V(n004)

.meas Pin AVG Vin*Iout

.meas Pout AVG Vrms*Irms

.meas Efficiency AVG (Pout/Pin)*100

.tran 0 10ms 5ms//

To further analyse this SS IPT system, the extra resistance will be removed, and a few parameters will be changed:

  * [[Coupling coefficient]]
  * [[Load]]
  * [[Quality factor]]
  * [[Resonant frequency]]