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How Do AC Motors Provide DC Power During Regenerative Braking?

Posted by heypaul on Sun Apr 26 23:21:31 2026

I've long wondered about how much energy is actually retrieved by other trains as a result of regenerative braking?

Now I have further muddied the situation. The new technology trains have ac motors, which require inverters to convert the 3rd rail DC power to AC. My question is when the train brakes, how does the AC motor/generator provide DC voltage to the 3rd rail? A separate rectifier? Or can you invert the inverter ?

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