Switching device for switched reluctance motor

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For a switched reluctance motor, suitable switching devices include MOSFETs, transistors, and relays. A vacuum tube is mentioned as a potential option, but its practicality and efficiency in this application are questioned. The discussion emphasizes the need to identify a fourth switching device that meets the motor's requirements. Participants are encouraged to explore alternatives that align with modern technology and performance standards. Ultimately, the focus remains on finding the most effective switching device for optimal motor operation.
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I have to choose four switching devices for a switched reluctance motor.

I have chosen a MOSFET, transistor and relay, what other device can be used?
 
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How about a vacuum tube?

Are you sure you are understanding the requirements of your task correctly?
 
I just have to investigate four switching devices. What other switching device can I use?
 
What is wrong with a vacuum tube?
 
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