You can not control when Google shows a Knowledge Card for user search queries (especially those related to your brand), because Google uses its algorithms to decide based on many, many factors.
You can’t directly control how Google manages the information it shows about your brand in Knowledge Cards either. But the good news is that there are strategies you can employ to manage the information Google has and ensure it is correct, and also increase the likelihood that Google will create a Knowledge Card for queries about your brand. The approach is to educate Google about your brand so that it has a firm and accurate understanding of who you are and what you do.
Here is a video clip where The Brand SERP Guy Jason Barnard talks about how Google works and educating Google as though it were a child.