描述
三电平高压变频器不管电机离的远近,都须装输出电抗器,以解决电机振动大,噪音大的缺陷。而共模电压的隐患导致电机绝缘老化问题。由于三电平逆变开关模式中存在的多点死区,而需长死区时间保障开关切换就带来很高的共模电压。其缺陷是由电路特点,硬件产生的,单靠优化控制软件,只能收到微小的效果。还需同佳灵JCS型一样,增加输出共模抑制器方可有效
New OKUMA Drive Board UCMB2+F A911-2821 E4809-770-144-A
ABB SPAD346C3 SPAD 346 C3 DIFFERENTIAL RELAY PROTECTION
Hypertherm HT2000 041677 129160 Chopper used Spare
Credence LT1101 Voltage Supply Board 671-4014-04 Spare
TE-W Thermal Infrared Camera 160*120 core protype
Lot of 2973pcs NEC UPD78F0102HMC-5A4 F0102H 8-bit $1/pc
Welch Allyn 88042A Colposcope Factory Refurbished Spare