I am designing a circuit to control a 3 phase resistive load (400V & 30A). The idea is to control the circuit with a microcontroller io. Since it will switch very often (1 Hz aprox), i decided that i am not going to use a mechanical switching relay (it will fail after a time). That is why i am looking for a "semiconductor element" as alternative like a SSR. I have no experience with this kind of applications.
- How is this normally done?
- Should i use 3 SSRs, 1 for every conductor?
- What other elements could i use? which are my alternatives? IGBTs are only for DC current...