标题: UL507 电风扇扇叶材料问题 [打印本页] 作者: aha0827 时间: 2012-8-10 13:56 标题: UL507 电风扇扇叶材料问题 UL507风扇标准中关于风扇的扇叶有如下要求：5 ^( E: g5 ~8 x" v6 {+ E4 W: I$ q
6.4.2 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. & f0 j' c1 r- w 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:5 l/ B( `9 \9 v( H% V
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:; t7 x' f: D, W
其中例外1“For all motor types except skeleton or open frame”是指哪种电机？ ; |" [( r* a \+ c, } 例外2“For bobbin-wound skeleton motors”又是指哪种电机。 5 Q2 \# G; c5 o* K0 N4 _- c 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。$ P6 h6 {# ?+ x: ~
[attach]75057[/attach]2 V% W8 c2 n! x6 x
电机1 1 B6 y2 C q' ` " V. N! H. Y- @0 {/ ]' O. ~" m 8 U! b9 g8 h& ^6 x+ L' K2 H[attach]75056[/attach] ' \+ g$ `# ^& j' W: D9 P6 s7 ^电机2 - ~) g) g' O7 |" F/ x 2 q+ C2 D# H O: A' M% S* y作者: aha0827 时间: 2012-8-10 15:01
例外2中提到： 2 Z; Q2 C; g( p4 K( a* Tc) The space between the coil covering and bobbin does not exceed 0.8 mm total.% D) l# m- P* t3 w+ B1 `0 p
这是哪个位置的，不理解。谁能帮忙解释下，最好有图解！谢谢！作者: xiaogao22 时间: 2014-9-25 17:55
no.---motor 2