UCC27714EVM-551: Using this EVM for 600W wireless power transfer

Hema Swaroop Mopidevi

Part Number: UCC27714EVM-551
Other Parts Discussed in Thread: UCC28950

Hi,

My idea is to replace the power transformer on this EVM with a wireless power transfer capable TX and RX coils. However, from the space and frequency constraints, I can only afford a 60uH magnetizing inductance and 16uH leakage inductance on the primary but I can still maintain 21:1 turns ratio with center tap on secondary. The recommendation from MathCAD design tool is Lm = 2.8mH and Llk = 4uH at inductor switching frequency of 600kHz (converter switching frequency is 300kHz). Can you please advice on the design changes I need to make in order to compensate for the low magnetizing inductance and high leakage inductance in the wireless power transfer set-up? If you think this exercise is futile, can you please suggest any other controller for high power wireless (10kW - 15kW) power transfer from TI and the corresponding reference designs?

Thanks,

Hema

over 6 years ago

0 Mateo Begue over 6 years ago

TI__Intellectual 2805 points

Hello Hema,
The appropriate engineer has been assigned to this post and should respond soon.
regards,
Mateo

0 Yunsheng Qu over 6 years ago

TI__Genius 9790 points

Hi, Hema

The very small magnetizing is harmful for power device selection and efficiency. You should select very big power device since peak current is increased because very small and cannot realize ZVS. It is recommended to follow design tool of UCC28950.

Regards,

Yunsheng

0 Jeffrey Mueller over 6 years ago in reply to Yunsheng Qu

TI__Genius 12990 points

Hi Hema,

If you have no further questions on your wireless power design I will close out this thread. You can reopen this thread by replying or simply create a new thread in the wireless e2e forum.

Thanks,

Power management

Power management forum

UCC27714EVM-551: Using this EVM for 600W wireless power transfer