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UL507风扇标准中关于风扇的扇叶有如下要求: y# m% M, h, H1 ^; n5 V: S
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.
1 K1 e y" m+ k. v7 u 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:
4 c$ ~5 u7 C: Z4 W4 p# @0 F! r8 i C 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:+ ]2 y" }6 e! z4 a! T# E! |7 @
其中例外1“For all motor types except skeleton or open frame”是指哪种电机?
. q8 o& M8 S$ B) h0 {! n8 K 例外2“For bobbin-wound skeleton motors”又是指哪种电机。& ]8 [! C; \$ z5 N% E8 }
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。
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电机2
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