描述
儲(chǔ)能電感。儲(chǔ)能電感在工作頻率下的Q值越大越好,很多人只注意到電感量,其實(shí)Q值的影響要大得多,電感量只要滿足要求允許在很大范圍內(nèi)波動(dòng)。
濾波電容。濾波電容的ESR和ESL是非常重要的參數(shù),越低越好,僅追求容量是遠(yuǎn)遠(yuǎn)不夠的,當(dāng)然在滿足足夠低的ESR和ESL的前提下,容量大些較好。開(kāi)關(guān)電源的濾波電容優(yōu)選X7R或X5R電容與鉭電解的組合,紋波稍放寬可用Y5V電容和瘦高外觀的鋁電解(低ESL型)配合。
PCB設(shè)計(jì)。開(kāi)關(guān)電源的PCB設(shè)計(jì)非常重要,在前兩個(gè)條件都滿足時(shí)如果紋波參數(shù)還是達(dá)不到手冊(cè)中載明的數(shù)值,問(wèn)題就可以肯定是出在PCB上,開(kāi)關(guān)電源芯片的取樣及濾波回路的設(shè)計(jì)非常講究,PCB分布參數(shù)會(huì)導(dǎo)致調(diào)整誤差或?yàn)V波效率變差,嚴(yán)重時(shí)甚至可能導(dǎo)致自激(一般在特定的負(fù)載強(qiáng)度下發(fā)生),故不得不查。原則是取樣回路和濾波回路要盡量貼近開(kāi)關(guān)電源IC,PCB走線不可太長(zhǎng)、太細(xì),類似的儲(chǔ)能電感也有同樣原則,只是影響稍小,布局、走線不利相當(dāng)于降低了電感的Q值。最后要說(shuō)的是,因開(kāi)關(guān)電源IC的內(nèi)電路設(shè)計(jì)不同紋波指標(biāo)也是不同的,多數(shù)情況下,開(kāi)關(guān)頻率高的容易獲得較低的紋波,但價(jià)格及對(duì)外圍元件的要求相對(duì)更高,所以要根據(jù)需要合理選擇,夠用即可,否則要付出不必要的成本,器件手冊(cè)的仔細(xì)閱讀及理解是第一步。
產(chǎn)品承諾:
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨,
保?證售后服務(wù)質(zhì)量,
優(yōu)勢(shì)價(jià)格,大量現(xiàn)貨。
主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌:ABB???,AB??,GE,FOXBORO,本特利,英維思,伍德沃德,西屋,瑞恩,施耐德,西門(mén)子,摩托羅拉,安川。力士樂(lè)。ACSO,橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫(kù)存商家
PARKER A1 CONSTANT PRESSURE EXPANSION VALVE
PARKER PNEUMATIC PRESSURE REGULATOR 3/8″ Ports 06R213AC
Expedited shipping available
PARKER PRESSURE FLOW CONTROL # PCK1020S-11
PARKER CONVUM DIGITAL PRESSURE SENSOR MPS-P32N-PG
PARKER PRESSURE REGULATOR
Parker-Finite Pneumatic pressure regulator F06R313AC
PARKER ASIC PERFORMER PRESSURE TRANSDUCER TRANSMITTER
PARKER ASIC PERFORMER PRESSURE TRANSDUCER TRANSMITTER
PARKER HI PRESSURE LIVE SWIVEL
PARKER 035632000B PRESSURE REGULATOR NIB
New Parker Pressure Regulator 06R216AC 250 PSI P-Max
Parker 71215SN2EN00 Pressure Vessel USED Free Ship
Parker Pressure Reducing Manapak Flow Control Valve NIB
NIB PARKER 71215SN2EN00 PRESSURE VESSEL ORIFICE 3/64
Parker No-Skive High Pressure Hydraulic Hose 304-1 NIB
International NEW Parker Pressure Switch 379502 FR SHIP
New Parker GP-111-03 Pressure Gauge 0-160 PSI Regulator
PARKER PNEUMATICS PRESSURE OIL AIR HYDRAULIC CYLINDER
Parker Schrader Pressure Regulator Gauge 035600200
NIB PARKER PNEUMATIC PRESSURE REGULATOR 14R013FC 1/8″ F
PARKER FOR TOTAL CONTROL WHEN THE PRESSURE’S ON 20713
Parker Veriflow Air Pressure Regulator Valve HFR902W
Parker PS1-P1091 Pneumatic Pressure Switch Line Mounted
Carrier Parker Differential Pressure sensor
Lot of PARKER POLYFLEX HIGH PRESSURE FITTING Qty 4 NEW
NEW LOT INDUSTRIAL PARKER HIGH PRESSURE HOSES 2600PSI
NEW PARKER PNEUMATIC REMOTE PILOT SIGNAL PRESSURE VALVE
PARKER AIR PRESSURE with POLYCARBONATE BOWL & GAUGE
PLC模塊,可編程控制器,CPU模塊,IO模塊,AI模塊,通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅
15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫(kù)存商家