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问题请教:
Z N+ A( {5 `. Y5 d' U如题目:) ~# x6 ]; r9 f% F9 W
加拿大C22.2 no.77-95 Motors with Inherent Overheating Protection( S, e0 S+ _' Q- _) X7 ?
如下测试要求
8 O" X- @ J% K V, S5.6.6 Motors with Thermal Cutoffs; E4 A+ K: M4 n* `, I& T6 q
Motors with thermal cutoffs shall be subjected to an endurance test of 18 d, with the winding8 F' P; C; i8 n6 G8 ~
at the maximum temperature that the protector will allow (see Clause 5.4.1) plus the total
/ F! g1 a. t; Hprotector tolerance or, if the manufacturer requests, at a lower temperature, but in no case
- J$ r& z; D# B. ` p- M1 [1 r) Tless than 150°C if Class A or 175°C if Class B, F, or H insulation. The temperature shall be( {* F% Y/ g8 K
obtained under locked-rotor conditions by adjusting the applied voltage or the ambient
: h8 U: Z, x: T9 |temperature. During this test, the protector shall be disconnected from the circuit.# L8 I0 Q L" x8 T6 h
9 U' @1 ^) \- E: q1 @# {1 F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 A3 e+ x# I6 T$ z# P1 D& u1 W
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问题:那这个测试过程中,通过调电压的方式,) J7 y) d) Y: T: n7 w
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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