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Power Switching Circuits

Mayank Srivastava
Prodigy 40 points

I am looking to get the switching modules which can switch the high DC voltage coming from the programmable power supply for our Micro-EDM application. 
 {Micro-EDM is an application where one terminal from DC power source (-ve) after switching been connected to the tool & other terminal (+ve) been connected to the workpiece. As soon as these tool & workpiece comes close to each other, spark happens due to electric field and material is removed.} 

The DC Power supply specs are as below:

 V: 300V DC

I: 11 A

I needed some modules or circuits which can switch such high DC upto:

 Pulse ON / OFF : 500ns - 5 microseconds

Frequency : upto 2MHz or even better

These circuits/modules should be mainly connected through the DC Power source (300V DC, 11 A {what we have in our lab} ), whose one terminal  i.e. negative terminal usually been used for switching ON or OFF using either RC-Based or Transistor-Based Switching circuits. 
Please help me.
  • 0
    TI__Mastermind 25590 points
    Mayank,

    I've forwarded this to an expert in high-power high-voltage. The engineer will get back to you shortly.

    -Sam
  • 0
    TI__Expert 3225 points

    Hi Mayank,

    For this application, I assume that you will get large current spike? Is there any current before you turn on the switch? We need to identify if there is any current/voltage overlap during the transient that you turn on your switch. Also how large is the RMS current across the switch? Please have a simulation on this to understand it better.

    I would say a transistor based circuit would be preferred, but it is important to know what transistor you want to use based on your answer to my questions above.

    Thanks and regards,

    Lixing