In a series hybrid bicycle (SH) the user resistances a generator using the pedals. This is converted into electricity and can be fed straight to the motor giving a chainless bicycle but also to charge a battery. The motor draws power from the battery and must be intelligent to deliver the full mechanical torque required because none is available from the pedals. SH bicycles are commercially exist, because they are very simple in theory and manufacturing.
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Ginny Logan
real estate