Hub motor
Hub motor

Hub motor

  • Advantages of hub motors

    1.The transmission parts are reduced and the structure is simple. The clutch, transmission, transmission shaft, differential, etc. of traditional vehicles are omitted, and the structure is simpler. 2.Improved transmission efficiency. The transmission system is simple, the loss is reduced, the efficiency is improved, and it is more energy-saving. 3.The subsequent changes after the use of in-wheel motors have produced many advantages, such as space saving, convenient control, lower theoretical cost, and so on.

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  • Disadvantages of hub motors

    1. Unsprung quality problems. It has a significant impact on the suspension system and brake system of the vehicle, and may even overturn the existing chassis technology theory. 2. Electric brake problem. Electric brakes are the first choice for electric vehicles. However, for vehicles driven by in-wheel motors, the electric brake capacity of the in-wheel motor system is small, which cannot meet the requirements of vehicle braking performance. An additional mechanical brake system is required, but it still needs to be consumed. Part of the electric energy is used to vacuum or directly drive the booster pump. Therefore, whether it is going or stopping, it will consume a lot of energy for the in-wheel motor. 3. Motor cooling problem. The ultra-high integration level makes the cooling of the entire drive system a problem. 4. The problem of adaptability to working conditions. Such as sealing, vibration and noise, durability, etc.

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  • Types of in-wheel motors

    Brush motors and brushless motors: Due to low efficiency, brush motors for vehicles have been phased out. Sensors and sensorless: Some electric bicycles must be stepped on to drive, because there are no sensors inside. It directly measures the back electromotive force of the motor and knows the position of the rotor to perform commutation. To know the relative position of the rotor and stator before starting, a sensor must be used. Geared and gearless: In order to prevent the demagnetization of the magnetic steel and reduce the starting current, the motor must use a reduction gear to improve the starting efficiency. After the magnetic steel material is improved, gears are not necessary.

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  • How to select the right motor for an electric bicycle

    Motors can typically be located in three different places on your bike: 1. Front wheel, 2. Rear wheel, or 3. Bottom bracket (Mid-drive motor). The front and rear wheel motors are known as hub motors because they take over the hub of the wheel. The primary advantage of these types of motors are they are relatively simple and straightforward to do a conversion once you get a wheel built around the motor -just replace your wheel, connect the battery, and you're om The mid-drive motors replace your crank and chain ring through your bottom bracket. The advantages of these motors are they end up taking advantage of your gears and keep the weight distribution low and near the center of your bike.

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  • Front-Hub motors

    Positioned on the front wheel hub, they're common on folding bikes and cheaper touring e-bikes.Pros: The motor doesn't wear down the chain- the motor is directly powering the wheel, rather than the drive chain You can customise gears easily.Cons: The bike can be unbalanced- the front is heavier than the back Tricky to remove the front wheel for transportation. Front wheel can slip on steep climbs if you don't distribute your weight properly The motor pulls you forward, rather than pushing youl which can feel strange

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  • Mid-Hub motors

    E-bikes with a mid-hub motor (sometimes called a mid-engine motor) are typically more expensive. They do have some significant advantages though. Pros: More balanced weight distribution, making it easier to lift and carry Best for off-road riding because the centre of gravity is lower compared with front or rear-hub motors You can easily customise, switch or replace wheels Wheels are easy to remove for transportation. Cons: You can't customise the gear setup as easily. The crankset (pedals and front chain ring) can't be changed, although you can change the cassette (gears) on the rear hub so you're not completely limited Drive chain can wear down more quickly.

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  • Rear-Hub motors

    Pros: The motor pushes you forward, which feels more natural to most people than being pulled forward by a front-hub motor The motor should wear down the chain less quickly than a mid-hub motor Easy to customise the gears. Cons: You need a specially designed rear wheel Tricky to remove the rear wheel for transportation The bike can be unbalanced - the back is heavier than the front. This issue is exacerbated if the battery is also located at the back and the bike doesn't have front suspension.

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  • Voltage and Power

    lt's easy to get lost in these numbers since everyone will try to sell you on "more performance." But you really need to assess your riding to figure out what you need. First of all, neither of these numbers will necessarily get you faster speed. Top speed is generally capped at 20 or 28 mph depending on the system and this is a government regulation. Lower power motors are perfectly suitable for relatively flat, around town riding and you'll still be able to hit 20 mph or more! More power is best if you're towing a load or are a larger rider. lt will also accelerate a little faster and will go faster uphill. A higher voltage motor will allow you to use fewer cells in your battery because the current draw will be less for the same power. As such, it won't run as hot either, which will minimize potential overheating problems. If you don't need to sustain maximum power though.

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