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问题请教:
/ V5 b9 n: e+ ^) o如题目:# B g/ u0 [8 i1 I0 L, P+ j
加拿大C22.2 no.77-95 Motors with Inherent Overheating Protection. U3 s; ]4 j$ y& u, b0 `' Z
如下测试要求$ A9 S3 a6 }& ^$ f2 N3 m
5.6.6 Motors with Thermal Cutoffs. c* Q7 q9 i, ?, s" Z2 e
Motors with thermal cutoffs shall be subjected to an endurance test of 18 d, with the winding
6 l. X* J4 L; {. g* M- `% j' m, f5 ?at the maximum temperature that the protector will allow (see Clause 5.4.1) plus the total4 e2 g2 L1 s- V$ r, P0 L' `* R
protector tolerance or, if the manufacturer requests, at a lower temperature, but in no case6 o8 i# L/ n( T6 W
less than 150°C if Class A or 175°C if Class B, F, or H insulation. The temperature shall be
# w T5 u( e- k- _obtained under locked-rotor conditions by adjusting the applied voltage or the ambient3 W' x$ i6 b0 c8 S2 |) j
temperature. During this test, the protector shall be disconnected from the circuit.! @! C( Q" A2 Y( ?4 v
! j0 o0 N1 E. I+ h/ |* Y6 D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. r1 C+ w; W9 T; ^7 C" K9 Z
& w3 S. n1 z. {. _) A问题:那这个测试过程中,通过调电压的方式,; b/ N3 C( d; x, C: U- h
使电机线圈的温度保持在120度还是150度???" D8 o+ T, Z9 Y L' L
& e/ Q/ e, J7 F谢谢 |
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