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UL507风扇标准中关于风扇的扇叶有如下要求:
% d T. D" \2 I& M; W6.4.2 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.
0 C7 q+ h, Y: b: o2 `, K7 p) g1 a 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:
7 ^+ }& _' E7 j3 U2 x5 W* N9 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:
! b# j% _7 B( ?& {& r其中例外1“For all motor types except skeleton or open frame”是指哪种电机?
- w# _& R i Z- M: _7 X$ s 例外2“For bobbin-wound skeleton motors”又是指哪种电机。
# h8 U0 J0 V8 H5 [ E 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。* F4 S `& K6 s: o `1 [
- G2 G; L% I$ G电机1
1 X8 k9 i9 {; l+ @* _# U' J9 S% e7 ^: F: w2 e
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, @; A, |3 Q( b( m# t' M电机2* `" P" b) T- H3 X! E) \
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