Working concept of variable speed controller.

The working concept of the transmission controller is to realize shifting of different gears by controlling the operation of the transmission and adjusting the gear ratio of the bicycle.

On a bicycle, the derailleur usually consists of a front derailleur and a derailleur. A transmission controller is connected to these transmissions and controls shifting by manipulating the shift handle.

When the rider turns the shift lever, the shift controller releases or tightens the cable, which causes the front or rear derailleur to move. The front derailleur is used to adjust the front chainring, while the rear derailleur is used to adjust the rear chainring.

As the derailleur moves, the chain shifts from one chainring to the other, changing the bike's gear ratios. Smaller chainrings provide higher gear ratios and are suitable for climbing hills or when more power output is required. A larger chainring provides a lower gear ratio, suitable for high-speed riding or situations where higher speeds are required.

Through the adjustment of the transmission controller, the rider can select the appropriate gear ratio according to road conditions, slope and personal physical strength level to achieve a more efficient and comfortable riding experience.