The Owls have been linked with a range of players already this month, but Carvalhal insists that he does not intend to make too many additions.
The Portuguese boss feels that stability is more important at this stage of the campaign, and he wants to tie down his current squad before thinking about bringing in any fresh faces.
"I think the more you do in July, the less you have to do in January or you start having problems," he said.
"I am a coach that lives in an emotional environment and have emotional connections so you can do this if you don't move your team around too much and move too many players.
"This transfer window we're planning firstly [to] get the contracts in order for the players we have on loan and after this if we do something, then it will be a few things but not big changes [to] the team, I'm absolutely sure.”
Wednesday have made a productive start to Carvalhal’s plans, with a range of players signing new deals.
Barry Bannan, Sam Hutchinson and Adthe Nuhiu have all committed their futures to the Yorkshire side, by penning new contracts.
Wednesday are also set to convert Gary Hooper’s loan to a permanent transfer from Norwich City later today, according to the Sheffield Star.
Carvalhal’s side have already completed deals for Jack Hunt and Joe Bennett, adding further quality to a squad already packed with talent.