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1C31204G01
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b、降低了输出高次谐波造成的漏电流
c、减少了干扰
d、保护了变频器内部的功率开关器件
e、延长了电机的绝缘寿命
变频器主电路上设备的选择以提高变频器的某种性能或者为变频器和电动机提供保护或者减少变频器对其他设备的影响为主要
虽然输入电抗器的容量选择和电源容量有较大关系，但在一般情况下，可以按照在额定电压和额定电流的条件下使电抗器上的电压降在2%-5%之间原则进行选择。这时，综合功率因素一般可以改善至80%-85%。
3 输出侧交流电抗器。由于变频器输出是脉冲宽度调制的电压波（PWM波）它是前后沿很陡的一联串脉冲方波，存在丰富的谐波，这些谐波增加了电动机的振动和噪声，有害于电机和负载的寿命。典型的是电机绕组间瞬变电压dv/dt过高，造成匝间击穿，以及对周围电器干扰；当负载电容分量大时，造成变频器的开关器件流过大的冲击电流，会损坏开关器件，使用输出侧交流电抗器可进行平滑滤波，减少瞬变电压dv/dt的影响，并求得以下改善。
b、降低了输出高次谐波造成的漏电流
c、减少了干扰
d、保护了变频器内部的功率开关器件
e、延长了电机的绝缘寿命
变频器主电路上设备的选择以提高变频器的某种性能或者为变频器和电动机提供保护或者减少变频器对其他设备的影响为主要
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