FOXBORO FCP270/P0917YZ
FOXBORO FCP270/P0917YZ
FOXBORO FCP270/P0917YZ
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单相双值电容异步电动机又称“电容启动与运转式”，是指具有启动电容和运转电容的电机。启动电容主要是提高电机的启动力矩，当电机达到额定转速的75%左右时，由脱离装置从电机的启动绕组中断开。这个启动装置一般叫“离心开关”，也有用人工脱离的。运转电容在电机启动之初也同样有帮助启动的作用，但它一直陪电机运转。它的主要作用是平衡电机主绕组和副绕组之间的电磁关系，减少电磁死角，以最大限度地提高电机的功率，降低噪音和震动。
单电容电机要分两种情况。第一种称为“电容启动式”，这种电容的唯一作用就是帮助电机启动，这种型式一般用在功率300W以上的比较大的单相电机上。第二种称为“电容运转式”，这种电容即有启动作用又有运转的功能。这种型式一般用在300w以下的电机上。原理同上。
总结：如果用同样体积的铁芯，电容启动式的功率要下，噪声要大，震动要厉害点。反之电容运转式功率大，噪声小，震动低。电容启动与运转式就克服了上面两种的缺点，发扬了优点。对于小功率电机来说，因为启动力矩较小，如果增加了离心装置，即增加了成本，又增大了体积，况且对启动没有什么实际影响，所以一般都采用电容运转式。
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