Bidirectional power flow 1 Current source converters Demonstrations 1 Direct drive 1 Drive power 1 Electric drives 1 Electric machine control 1 Hybrid machine 1 Hydroelectric generators 1 Linear generators 1 Permanent magnets 1 Power converters 1 Power takeoffs 1 Tanks (containers) 1 Vernier hybrid machine 1 Wave energy 1 Wave energy conversion 1 Wave energy converters 1 Wave tank 1 current source converter 1 direct drive 1 linear generator 1 vernier hybrid machine 1 wave energy 1