DualDrive - Wire line winches

NexxtDrive's adaptation of its DualDrive system to wire line winches provides extremely precise control allied to very rapid operation and clutchless forward and reverse.

NexxtHub enables the simple combination of both a mechanical power input and an electrical power input into a single mechanical power output.

One of the motor/generators acts as a generator and transmits electrical power to the other which acts as motor. The amount of electrical power so transmitted may be selectively varied by means of the controller thereby altering the transmission ratio of the transmission system. Power is transmitted through the transmission system both mechanically and electrically, in proportions which vary accordingly with the transmission ratio. The output speed of the transmission, and thus the speed of the hub member, may be varied independently of the input speed. Which means the speed of the wheel connected to the hub member may be varied independently of the speed of the engine or the pedals to which it is connected.

In a Pedelec application input power is applied by the user to the pedals of the bicycle. The controller may be actuated to additionally supply electrical power from the battery to one or other of the motor/generators to augment the power supplied by the user and thus assist the cyclist to, for instance, ride more easily up a hill.

The transmission can also operate as a brake and the action of braking will generate electricity which can be used to recharge the battery. The use of such regenerative braking will increase the overall fuel efficiency. The controller can be operated to virtually lock the hub and the hub can therefore replace the brake.