2013年8月6日星期二

Small electric car China market “growth worry”

2013 Chinese Changchun international automobile technology forum ferments continually the small electric car’s topic. The attending expert indicated that small electric car wheel hub motor China market bitter experience “growth worry”.
With the market in electric cars and so on popular Toyota Pu sharp Si compare, the small electric car general volume is small, the price is low, continues drives the course not to be high, but the charge convenience, the performance-to-price ratio is high, receives very many Chinese consumer’s welcome.
“the small electric car price is cheap, lowest less than 30,000 Yuan, about highest 50,000 Yuan. The highest speed can achieve 50 to 70 kilometers each hour, the biggest continue voyage course can arrive to 70 to 100 kilometers.”Participated in this forum’s Chinese Academy of Engineering academician Guo Konghui to say.
Most in the last few years, Guo Konghui has paid attention to motorcycle hub motor kit the small electric car in the Chinese market performance, and arrives at Shandong frequently and so on small electric car market demand exuberant area investigation and study. He introduced that regarding the cities or the countryside area, the small electric car is practical, the charge convenience, does not need the complex charge facility, electric motorcycle hub motor may charge in own, is equal only to air conditioning’s electricity consumption.
Although the small electric car merit is numerous, but is actually being restricted policy. Before Chinese labor letter department releases “Energy conservation And New Energy Automobile Industrial development Plan”, had determined “take the pure electric drive as the new energy automobile development and the automobile industry reforming main strategic orientation”, and stipulated the pure electric automobile maximum speed is not lower than to 2015 for 100 kilometers/hours, electric motors for bicycles under the comprehensive operating mode continues drives the course not to be lower than 150 kilometers.
“the such high threshold, in fact already removed the small electric car in outside”. Guo Konghui said.
Why is the small electric car restricted policy? One kind of mainstream’s viewpoint believed that the small electric car’s voltage is low, the electrical machinery power is limited, use materials and so on lead-acid battery can have the pollution, therefore should place the center of gravity in the high-end electric car’s research and development.
“at present, the small electric motor for bicycle electric car and the Production enterprise looks like the roadside weeds equally tenacious growth, longed for that grows up.”Guo Konghui said. If obtains the national policy approval, the small electric car’s formalization not only will impel the battery, the electrical machinery and so on key technologies enhancement, will also promote the high-end electric car’s industrial production.

Which not brushes electrical machinery’s erroneous zone to have

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Very many people see the model to use not to brush the electrical machinery, they use are the battery power supply, therefore very many people have had such an erroneous zone in the knowledge, thought that not electric motors for bicycles brushes the electrical machinery is the direct current machine, is in effect it is not so, not brushes the electrical machinery to belong to the alternating current machine, is the three-phase AC magnetoelectric machine’s one kind, the input model not brushes the electrical machinery 3 wires the electric currents electric motor for bicycle is the alternating current, but this kind of alternating current is not the 50HZ city electricity sine wave, but from not brushes the electrical machinery controller (popular name not to brush the three-phase alternation rectangular wave which electricity accent) modulates, the frequency is higher than 50HZ are very many, and changes along with the electrical machinery rotational speed change

The straight class not brushes decelerates electrical machinery’s application prospect

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Speaks of not brushes the electrical machinery, did not know that friends’ bike hub motor understand

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Below slightly arranged gives everybody not to brush electrical machinery’s movement principle, simple said that depends upon the change to input to not brushes in the electrical machinery stator coil the current wave alternative frequency and the profile, formed one around the winding coil to circle electrical machinery geometry axle center revolving the magnetic field, on this magnetic field actuation rotor’s permanent magnetism magnet steel rotation, not brushed bicycle electric motor the electrical machinery to transfer, not brushed factors and so on electrical machinery’s performance and magnet steel quantity, magnet steel intensity of magnetization flux, electrical machinery input voltage size related, with not brushed electrical machinery’s control performance to have the very big relations, because input is the direct current, the electric current needed the electronic velometer to turn it 3 intersectionsDischarge, but also needs electric bicycle motor from the remote control receiver there receive control signal, the control not to brush electrical machinery’s rotational speed, meets the model use needs.
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