电源工作原理简述，开关电源由UC3842组成，其12脚为供电脚，此电源由电容板+530V经过R1 R2 R7 R8降压限流，稳压管ZD1稳压提供，没有传统的启动支路，震荡频率由7脚外接的R/C定时元件进行调整。5脚为电流取样，外接47欧姆到地，说明已将过流保护功能取消了。10脚输出PWM脉冲驱动开关管工作。
具体可以参考草图，此图由于有很多的微型贴片元件组成，元件布置密集，故可能有很多错误的地方，但是基本不影响分析，特别是红圈内的电路，望谅解。
Vacon变频器NXL系列
NXL00035C2H1SSS
NXL00045C2H1SSS
NXL00055C2H1SSS
NXL00075C2H1SSS
NXL00095C2H1SSS
NXL00125C2H1SSS
NXL00165C2H1SSS
NXL00235C2H1SSS
NXL00315C2H1SSS
NXL00385C2H1SSS
NXL00465C2H1SSS
NXL00615C2H1SSS
Vacon变频器NXS系列
NXS00035A2H1SSSA1A2
NXS00045A2H1SSSA1A2
NXS00055A2H1SSSA1A2
NXS00075A2H1SSSA1A2
NXS00095A2H1SSSA1A2
NXS00125A2H1SSSA1A2
NXS00165A2H1SSSA1A2
NXS00225A2H1SSSA1A2
NXS00315A2H1SSSA1A2
NXS00385A2H1SSSA1A2
NXS00455A2H1SSSA1A2
NXS00615A2H1SSSA1A2
NXS00725A2H0SSSA1A2
NXS00875A2H0SSSA1A2
NXS01055A2H0SSSA1A2
NXS01405A2H0SSSA1A2
NXS01685A2H0SSSA1A2
NXS02055A2H0SSSA1A2
NXS02615A2H0SSFA1A2
NXS03005A2H0SSFA1A2
NXS03855A0N0SSAA1A2
NXS04605A0N0SSAA1A2
NXS05205A0N0SSAA1A2
J-VS26-01ZT