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### Author Topic: LTspice models for bifilar coils  (Read 9471 times)

#### kouta

• Newbie
• Posts: 1
##### Re: LTspice models for bifilar coils
« Reply #15 on: August 04, 2022, 02:55:15 AM »
Nice to meet you. My name is Kota Imai.
I am a fourth-year university student at Miyazaki University in Japan.
I am not good at English, so I made this text using a translation application. I apologize if it is hard to read.
I am currently researching wireless power transfer systems.
Among them, I am researching on how to improve the transmission distance of wireless power charging systems.
I am thinking of adding a relay circuit to improve the transmission distance, and since there are various previous studies on simply adding a relay circuit, I am aiming to improve the transmission distance by using different types and shapes of coils.
Therefore, I am interested in bifilar coils.
I am planning to add a bifilar coil to the relay circuit only and conduct an experiment to compare it with other coils to see if it improves the transmission distance. However, I do not have much knowledge in electric circuits. So I would like to do a simulation using LTspice before doing the experiment.
I tried to import the bifilar coil elements as described here into LTspice for simulation, but I could not use them in a circuit for a wireless power supply system. So I need you to make an open bifilar coil element in LTspice that can be used in a circuit for a wireless power charging system.
But I am a student and poor so I cannot give you money. But I will introduce you in my graduation thesis which I will present in March 2023. So I would like you to make me an element. Thank you very much.

#### indigo22

• Sr. Member
• Posts: 302
##### Re: LTspice models for bifilar coils
« Reply #16 on: August 29, 2022, 07:31:17 PM »
Please check my posts on my tvkcoil on multisim