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UL507风扇标准中关于风扇的扇叶有如下要求:# b/ U$ p, z! b+ ~* H
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. z7 Q) O* G1 L5 K, S# f. F
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:$ A, O( ^5 g$ O3 O( u! c1 ]
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:# D) d5 I) ^- Q$ }
其中例外1“For all motor types except skeleton or open frame”是指哪种电机?
' e/ F7 g% I8 U4 F 例外2“For bobbin-wound skeleton motors”又是指哪种电机。8 V! a$ h' p, G$ {
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。4 ]7 V O! @8 m; z9 T
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电机1( g8 X* f, \% r3 j* ~
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3 ^$ y, `8 A% e" I4 C/ ^& S/ ~; J电机2
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