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问题请教:2 f) W; K, b+ D
如题目:
% |0 U" J7 X' [加拿大C22.2 no.77-95 Motors with Inherent Overheating Protection
- j9 a# V# V+ X2 { x3 \3 ]如下测试要求% l# a8 ^! E7 |! t3 E, b! k
5.6.6 Motors with Thermal Cutoffs% v# ~7 J( S# L( Y3 L5 I) Y
Motors with thermal cutoffs shall be subjected to an endurance test of 18 d, with the winding
8 \& q# a& A" h& xat the maximum temperature that the protector will allow (see Clause 5.4.1) plus the total
3 ]- T% O2 k9 M) B0 H9 jprotector tolerance or, if the manufacturer requests, at a lower temperature, but in no case
/ _; ~3 K3 n1 Y5 {- K* iless than 150°C if Class A or 175°C if Class B, F, or H insulation. The temperature shall be
( w+ ^1 X4 s: t; f( ?$ n) u+ {( lobtained under locked-rotor conditions by adjusting the applied voltage or the ambient! r/ Y4 d! e2 f
temperature. During this test, the protector shall be disconnected from the circuit.
5 K/ l/ g. f! Y4 U) A5 L; ~4 J F) P2 F" O
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
! Y' G! O( C+ L! H8 B ~$ R
1 R: r) y/ {; ^" ]问题:那这个测试过程中,通过调电压的方式,! @' y, g7 z: x" \% E; I
使电机线圈的温度保持在120度还是150度???
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, q7 V' {. D! n4 B3 `, w& C谢谢 |
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