According to PwC, electric car batteries now cost a little more than $ 600 a kilowatt, meaning a 20 kW battery needed to power an all electric car runs about $ 12,000 dollars & compared to about $ 2,000 for a conventional combustion engine. 普华永道称,目前汽车电池每千瓦成本是600多美元,意味着一辆纯电动汽车所需的一块20千瓦电池需要12000美元&而目前一台普通内燃机的成本大概只有2000美元。
With the development of society and the increasing industrialization, large electric motors applications become more widespread, ranging from a few thousand to tens of thousands of kilowatt ( kW ) power level increasing, but the high start-up problems had plagued the electric motors engineering. 随着社会发展和工业化程度的提高,大功率电动机的应用越来越普遍,从几千千瓦到几万千瓦,功率级别越来越大,然而大功率电动机的起动问题一直困扰着工程界。