Help choosing an ESC for a 500W/60V motor
I would suggest you study Brushless 3 phase DC motors.  It would take a book to explain how to do it.  You will be creating three separate synchronized phases 120 degrees out of phase.  That is not easy to do.

Try this link for a start: https://www.youtube.com/watch?v=E3BS8CO9APA
This is also good: https://www.youtube.com/watch?v=WyQInXjpGwU  Sorry I did not find part 1.

After you get through these and a few others you find I am almost certain you will pick another controller if you do the project.

Good Luck,
Gil