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Author Topic: electricity input saver  (Read 13141 times)

Offline lancaIV

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Re: electricity input saver
« Reply #15 on: May 15, 2021, 03:24:26 PM »
https://worldwide.espacenet.com/publicationDetails/description?CC=DE&NR=3003026A1&KC=A1&FT=D&ND=3&date=19810730&DB=EPODOC&locale=en_EP


http://translationportal.epo.org/emtp/translate/?ACTION=description-retrieval&COUNTRY=DE&ENGINE=google&FORMAT=docdb&KIND=A1&LOCALE=en_EP&NUMBER=3003026&OPS=ops.epo.org/3.2&SRCLANG=de&TRGLANG=en




Unfortunately, in the past one made the serious mistake of being guided by sales tactical arguments when choosing the nominal motor power, i.e. a power rating of 1 hp was considered necessary in


                                  comparison to the average power of 50 to 100 watts of a person

with 700 to 800 (Watts) smooth around the Motors that were oversized by a factor of 10 required large and heavy batteries.






The inventive solution, which meets the aforementioned requirements, results from the use of a drive motor with permanent magnet excitation, which transmits its power to the tires via a friction roller drive on the motor shaft or to the wheel rims of the rear wheel, which is otherwise driven by pedal and chain, which are adapted for the aforementioned use.

Such a friction roller drive can be technically reliably feasible if the electromotive drive power is limited to an order of magnitude of about 1 OO W, in contrast to previous 800 watt electric bicycles. Due to the adapted dimensioning of the frictional engagement (correctly selected spring preload, adapted choice of material and shape for the friction wheel on the motor shaft), this type of power transmission also takes on the function of a safety slip clutch. When adjusted to the pressure spring a slip limit corresponding to z. For example, 1.5 times the nominal motor torque, it is not possible to load the motor and battery with more than 1.5 times the nominal current. In practical driving, this means that the cyclist, similar to earlier gasoline-powered bicycles, must first bring the rear wheel to a certain speed by pedal before the battery is switched on; on the motor without the risk of slip radium $ battery charge This eliminates the high peak currents that severely limit the operating range of the battery charge.

In addition, instead of lead starter batteries with their high peak power supply, other types of batteries such as E.g. Steel-air batteries with better energy storage capacity per battery weight are used. For example, to enable 6 lnn / h km / h, on the other hand without exceeding the slip limit with z. For example, to be able to drive 20 km / h with an electric motor, according to the invention the friction roller wheel on the motor side is designed as a kind of cone




                                                                   


                                                                         Appropriate technology and dimension for the right velocity !




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Re: electricity input saver
« Reply #15 on: May 15, 2021, 03:24:26 PM »

 

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