drunkencat129
100 W
- Joined
- Aug 5, 2008
- Messages
- 116
i stumbled apon this on youtube its looks realy good http://www.youtube.com/watch?v=6_41btVawMc&feature=related i wonder if u can mod a 5304 to do that 
lol
lol
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vary intresting electric gear box for hub motor :P
- Thread starter drunkencat129
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johnrobholmes
10 MW
Too bad efficiency goes in the toilet and amp draw goes through the roof.
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100 MW
Hi John. Is this true also for the more classic "field weakening" via sepex motors?johnrobholmes said:
tks
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johnrobholmes
10 MW
Not sure about sepex motors, but I know that PM motors get a good hit to efficiency when the airgap is larger.
My guess is that sepex motors have higher overall efficiencies as compared to series motors, but have the advantage that KV can be increased on the fly so that starting torque and efficiency can be kept high. As the field is weakened the torque and efficiency should decrease. Trying to find some resources for info on variable field motors, but can't seem to dig up much on efficiency curves.
My guess is that sepex motors have higher overall efficiencies as compared to series motors, but have the advantage that KV can be increased on the fly so that starting torque and efficiency can be kept high. As the field is weakened the torque and efficiency should decrease. Trying to find some resources for info on variable field motors, but can't seem to dig up much on efficiency curves.
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