传统的模拟操控虽然具有连续性好、呼应速度快及成本低的优点,但也有难以克服的缺陷,如体系调试困难,简略遭到环境温度改变的影响而发生漂移,难以完成柔性化规划,缺少完成杂乱核算的能力,无法完成现代操控理论指导下的操控算法等。所以现代伺服操控器均选用全数字化构造,伺服操控体系的首要理论也选用了现代的矢量操控思维,它完成了电流向量的幅值操控和相位操控。
为了进步商品的功用,新一代的伺服操控器选用了多种新技术、新工艺。如安川公司的伺服操控器就选用了很多新的技术手段来进步其商品的功用,其间首要有以下几个方面。
(1)在电流环路中选用了d—q轴改换电流单元,在新的操控方法中,主CPU的运算量得以削减,经过硬件来进行电流环操控,行将操控算法固化在LSI专用硬件环路中。经过选用高速的d—q轴改换电流单元,使电流环的转矩操控精度有了进一步的进步。运用d—q轴改换电流操控,完成了在稳态运行及瞬态运行时均能坚持杰出的功用。
NEW SED MANUAL BONNET AND HAND
WHEEL 0.50" 290A
HACH EC30 pH METER PART # 50100-60
NEW IKAMAG EOA 3 MAGNETIC STIRRER
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STATE INDUSTRIAL METERING PUMP 120
VAC .35 AMP.63 GPH M仲鑫达
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