描述
無(wú)論是哪一種變頻器,都大量使用了晶閘管等非線(xiàn)性電力電子元件,不管采用哪種整流方式,變頻器從電網(wǎng)中吸取能量的方式都不是連續(xù)的正弦波,而是從脈動(dòng)的斷續(xù)方式向電網(wǎng)索取電流,這種脈動(dòng)電流和電網(wǎng)的沿路阻抗共同形成脈動(dòng)電壓降疊加在電網(wǎng)的電壓上,使電壓發(fā)生畸變,經(jīng)傅立葉原理分析可知,這種非同期正弦波電流是由于頻率相同的基波和頻率大于基波頻率的諧波組成。
Parker Veriflo Pressure Regulator Valve 45100064 SS
New Parker Veriflo Pressure Regulator 43800745 Series
Parker 71216SN2FU00 Skinner Valve Pressure Vessel
PARKER PRM2PP07LN 42 HYDRAULIC PRESSURE CONTROL VALVE
Parker MPS Convum PRESSURE Switch P6N-PG(11)
Parker sandvik high pressure hydraulic filter housing
2669 NEW Parker A4AZ Inlet Pressure Regulator
PARKER REFRIDGERANT INLET PRESSURE REGULATOR A8 A81
Parker pressure regulator 8311
PARKER PRESSURE REGULATOR
PARKER HYDRAULIC PRESSURE REDUCING VALVE