电动车前轮装350w无刷电机，行走时无主力怎样变成直流12v电压，望高手指点 350w电机的电动车，电池一般是多少A?
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350W\u7684\u7535\u673a\u914d\u7528\u7684\u7535\u6c60\u4e00\u822c\u90fd\u662f48V12AH\u7684\u3002
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48V12AH\u662f\u75314\u53ea12V12AH\uff086\uff0dDZM\uff0d12\uff09\u7684\u7535\u6c60\u4e32\u8054\u7ec4\u6210\u7684\uff0c\u7406\u8bba\u884c\u9a76\u91cc\u7a0b\u53ef\u8fbe56\u516c\u91cc\u5de6\u53f3\uff0c48V14\u53ef\u4ee5\u6362\u621048V17\uff0f20A\u7684\uff0c\u53ea\u6539\u53d8\u7535\u6c60\u7684\u5bb9\u91cf\u800c\u5df2\uff0c\u6ca1\u6539\u53d8\u5b83\u7684\u7535\u538b\u3002
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2\u3001\u7535\u74f6\u5728\u7535\u52a8\u81ea\u884c\u8f66\u4e0a\u5b89\u88c5\u8981\u7262\u56fa\u3002\u7535\u74f6\u62ff\u4e0b\u6765\u5145\u7535\uff0c\u5b89\u88c5\u7684\u65f6\u5019\uff0c\u7535\u74f6\u5728\u7535\u52a8\u81ea\u884c\u8f66\u4e0a\u5b89\u88c5\u8981\u7262\u56fa\uff0c\u4ee5\u9632\u9a91\u884c\u65f6\u7535\u74f6\u53d7\u632f\u52a8\u635f\u5bb3\u3002\u7535\u6c60\u5728\u642c\u8fd0\u4e2d\uff0c\u7981\u6b62\u6454\u63b7\u3001\u6eda\u7ffb\u3001\u91cd\u538b\u3002
3\u3001\u4fdd\u6301\u7535\u74f6\u5e72\u71e5\u3001\u6e05\u6d01\u3002\u7ecf\u5e38\u6e05\u9664\u7535\u74f6\u76d6\u4e0a\u7684\u7070\u5c18\u3001\u6c61\u7269\uff0c\u6ce8\u610f\u4fdd\u6301\u7535\u74f6\u5e72\u71e5\u3001\u6e05\uff0c\u4ee5\u9632\u7535\u74f6\u81ea\u884c\u653e\u7535\u3002
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问题描述不清楚，无法回答
问题描述不清楚，无法回答
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