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UL507风扇标准中关于风扇的扇叶有如下要求：
+ } s; ?7 T1 ^! F1 B i' z6.4.2 An impeller of polymeric material outside a motor shall not be located within 25.4 mm (1 inch) of an opening in the motor housing.. D" d9 f. O$ Y; }8 G+ [
Exception No. 1: For all motor types except skeleton or open frame, an impeller is not prohibited from being within 25.4 mm of an opening in the motor housing when:& v# E8 Y/ Y+ a
Exception No. 2: For bobbin-wound skeleton motors employed in a product other than ceiling-insert, wall-insert fans, or rangehoods, an impeller is not prohibited from being within 25.4 mm of the motor windings when:( {& F7 A" p$ A0 p4 }
其中例外1“For all motor types except skeleton or open frame”是指哪种电机？# E- b. ^ A- v: P) n: @6 a# f
例外2“For bobbin-wound skeleton motors”又是指哪种电机。) |- o0 h+ z/ F+ ^& d' p" b6 B
我的风扇有串激的，也有罩激的，如图，谁能帮忙确定下，电机1和电机2分别适用哪条例外。$ n9 z5 n/ N" d3 Q. g9 e
7 h+ G, Q& G4 D电机12 \ ]" h- D$ y
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" \* y- _0 a( P! e电机2
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发表于 2012-8-10 13:56
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