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UL507风扇标准中关于风扇的扇叶有如下要求:
- E1 e6 X$ s) I9 p# o# ]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.8 k1 H1 a9 Z5 d, p; B- e- @
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 _* w7 Q4 F8 z* G4 o 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:
7 W1 n+ d5 L& Q0 O( ^7 @! c8 p其中例外1“For all motor types except skeleton or open frame”是指哪种电机?
4 D+ x( B" h: {; S! a$ L 例外2“For bobbin-wound skeleton motors”又是指哪种电机。
; B* y2 g9 t% s3 A; b3 y 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。' ?) ?/ R4 K/ T8 W; s4 q- f
3 E6 O# @$ |/ a$ Z _4 E) P电机10 d C z" H9 ?; W* _( F( ?
6 |1 l; A* R# g+ s' M% ~ P6 E) x7 z# {0 ^/ Z Z+ u& J( S
6 Z J3 t! J+ z5 n电机2: L3 p4 Y0 u) k2 C8 E2 T
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