Hello everyone,
I am designing a project that will require a switching device (probably IGBT or MOSFET) that will conduct up to 30A of a 220V rectified sine wave to the load (the positive sine pulses.) Switching frequency will be 120 to 500hz and never over that.
Does anyone have any suggestions? I am looking over IGBT datasheets and am a little confused about the ratings for my situation. A typical IGBT with ratings as listed below show power dissipation limits that look like I will need to run quite a few in parallel... Bummer because they are quite expensive. If my project requires 30A x 240VAC = 7200W and the limit on the IGBT = 600W, then am I correct in saying I will need 12 of them in parallel to get the job done? I was under the impression using IGBTs in parallel was not a great idea. The "pulsed" collector current limit is 400A - I wonder if this will change things for me. I wouldn't think so since 600W is 600W no matter how you figure it.
I welcome any suggestions. I am not an EE, just a self-taught inventor with limited funds. I figure you guys might have some creative ideas.
Here are the specs:
STGE200NB60S Electrical ratings - from the datasheet
______________________________________________
VCES Collector-emitter voltage (VGS = 0) 600 V
VGE Gate-emitter voltage ±20 V
IC Collector current (continuous) at TC = 25°C 200 A
IC Collector current (continuous) at TC = 100°C 150 A
1. Pulse width limited by safe operating area
Collector current (pulsed) 400 A
PTOT Total dissipation at TC = 25°C 600 W
I am designing a project that will require a switching device (probably IGBT or MOSFET) that will conduct up to 30A of a 220V rectified sine wave to the load (the positive sine pulses.) Switching frequency will be 120 to 500hz and never over that.
Does anyone have any suggestions? I am looking over IGBT datasheets and am a little confused about the ratings for my situation. A typical IGBT with ratings as listed below show power dissipation limits that look like I will need to run quite a few in parallel... Bummer because they are quite expensive. If my project requires 30A x 240VAC = 7200W and the limit on the IGBT = 600W, then am I correct in saying I will need 12 of them in parallel to get the job done? I was under the impression using IGBTs in parallel was not a great idea. The "pulsed" collector current limit is 400A - I wonder if this will change things for me. I wouldn't think so since 600W is 600W no matter how you figure it.
I welcome any suggestions. I am not an EE, just a self-taught inventor with limited funds. I figure you guys might have some creative ideas.
Here are the specs:
STGE200NB60S Electrical ratings - from the datasheet
______________________________________________
VCES Collector-emitter voltage (VGS = 0) 600 V
VGE Gate-emitter voltage ±20 V
IC Collector current (continuous) at TC = 25°C 200 A
IC Collector current (continuous) at TC = 100°C 150 A
1. Pulse width limited by safe operating area
Collector current (pulsed) 400 A
PTOT Total dissipation at TC = 25°C 600 W