Inverter building using Wiseguys Power board and the Nano drive board

Author	Message
-dex- Senior Member Joined: 11/01/2024 Location: Poland Posts: 101	Posted: 08:44am 05 Jun 2024         KeepIS said   The aluminum stand forms part of a ground plane for the Nano controller. The Nano board is mounted with a single plated copper post and 3 plastic posts, the metal post connects the aluminum plate to the ground plane mounting terminal built into the controller PCB. It's important to ensure that no other ground connections interfere with this - The PCB ground plane connections is not connected to the controller PCB ground. This setup makes a huge difference to inverter noise in the Controller board. The aluminum stand is connected by a very short heavy gauge cable to the Negative battery terminal. Terminal is just above the stand. As inverter noise extends way up in the RF spectrum, this lead must be as short a possible and of good quality thick copper cable. This was setup and confirmed with a 380Mhz bandwidth DSO. . I'm still wondering if I really need this aluminum plate under the controller board. Have you performed any tests without this plate? Did the inverter controller become unstable without it? Edited 2024-06-05 18:45 by -dex-