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问题请教:! h! ]: w, Y8 h3 ?4 n- A: R: {5 i
如题目:' h9 E: M% R& p& Q W/ j( {" O
加拿大C22.2 no.77-95 Motors with Inherent Overheating Protection
5 y, O$ X! Y6 r# s( |如下测试要求
4 u$ J% p( l Z6 [/ n% Z8 d) [3 {5.6.6 Motors with Thermal Cutoffs
) F: ]1 u) M) K; Q8 ~$ S% mMotors with thermal cutoffs shall be subjected to an endurance test of 18 d, with the winding
( t" \+ v1 V9 D: e7 q' \at the maximum temperature that the protector will allow (see Clause 5.4.1) plus the total: j O. E: L/ @4 x
protector tolerance or, if the manufacturer requests, at a lower temperature, but in no case
% `! \& d" M( J' Uless than 150°C if Class A or 175°C if Class B, F, or H insulation. The temperature shall be
, Q( `% p! s+ _/ ?& e/ }9 yobtained under locked-rotor conditions by adjusting the applied voltage or the ambient
2 s: k5 R `1 @: R) vtemperature. During this test, the protector shall be disconnected from the circuit.; R9 d( h( e5 O, c) y
9 D* j+ G6 a# a% A目前电机上温度保护器动作温度为120度,电机绝缘等级为CLASS A
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问题:那这个测试过程中,通过调电压的方式,# H6 W$ D* Y! K& w: ?. ~4 t
使电机线圈的温度保持在120度还是150度???
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谢谢 |
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