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Power-assisted bicycles.
Power-assisted bicycles (electric bikes) are conventional bicycles fitted with a small electric motor that provides added power when the cyclist turns the pedals.
Power-assisted bicycles.
The motor is powered by a battery that drives a wheel, helping the cyclist to pedal more effortlessly, smoothly and comfortably. Electric bikes are particularly useful for getting round places where conventional bicycles are most difficult to use.
Operation.
Electric bikes work in the same way as conventional bicycles; using a switch, the cyclist can choose between riding with or without motor assistance.
Parts of a power-assisted (electric) bicycle: Battery.
This is the device in which the electricity is stored.
Parts of a power-assisted (electric) bicycle: Battery.
It can be removed from the bike and charged, just like a mobile phone. Charging the battery: the battery can be charged from any power outlet – in the home, the garage, etc.
Parts of a power-assisted (electric) bicycle: Battery.
There two types of batteries on the market:
• Lead gel: These moderately priced batteries are reliable in the long term, but they are very heavy (around 8 kg).
• Lithium ion: These batteries are much lighter (around 2kg) and have no memory effect. However, they are more expensive.
Parts of a power-assisted (electric) bicycle: Electric power.
The power does not exceed 250 W.
Parts of a power-assisted (electric) bicycle: Electric power.
The motor ceases operating when:
• The user stops pedalling.
• The speed rises to over 25 km/h.
Parts of a power-assisted (electric) bicycle: Electric power.
The motor ceases operating when:
• The user stops pedalling.
• The speed rises to over 25 km/h.
Parts of a power-assisted (electric) bicycle: Electric power.
The motor ceases operating when:
• The user stops pedalling.
• The speed rises to over 25 km/h.
Parts of a power-assisted (electric) bicycle: Electric power.
The motor ceases operating when:
• The user stops pedalling.
• The speed rises to over 25 km/h.
Parts of a power-assisted (electric) bicycle: Pedal sensor.
Calculates the force applied to the pedal by the user.
Parts of a power-assisted (electric) bicycle: Controls.
Allow the cyclist to select the degree of assistance.