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永磁变频螺杆空压机有缺陷吗?

澳门新莆京8455.com 0 2018-08-29


永磁变频螺杆空压机为使空压机的排气量与用户用气量达到平衡,普通空压机常用的气量调节方式为进气节流调节、加载/卸载调节等方式,由于存在进气节流导致真空度过大、以及加卸载时的压差损失等原因,这些方式的节能效果却不理想。

Permanent magnet variable frequency screw air compressor in order to balance the exhaust volume of air compressor with the amount of air used by users, the common air volume regulation methods of ordinary air compressor are intake throttle regulation, loading/unloading regulation and so on. Because of the existence of intake throttle resulting in excessive vacuum, as well as the loss of pressure difference during loading and unloading, these methods save energy. The effect is not ideal.

后来由于电机变频控制技术的发展,出现了通过对电机转速进行控制的调节方式,这种方式可使空压机的耗电量与排气量接近成线性比例变化,目前正逐渐普及开来。但是这种控制方式有以下几个缺陷:

Later, due to the development of motor frequency conversion control technology, there was a way to control the motor speed. This way can make the air compressor power consumption and exhaust volume close to linear proportion change, is gradually popularized. But this control method has the following drawbacks:

1. 普通异步电机的转速与负载小于设计的额定点时,电机的效率明显下降,而且差值越大其效率下降的越明显

1. When the speed and load of the ordinary asynchronous motor are less than the rated point, the efficiency of the motor decreases obviously, and the greater the difference, the more obvious the efficiency decreases.

2. 普通异步电机运行在较低的频率时,会出现输出转矩不足的问题,使得变频器出现“电机转矩过载”而跳机的故障

2. When the ordinary asynchronous motor runs at a lower frequency, the problem of insufficient output torque will occur, which makes the inverter appear "motor torque overload" and jump fault.

3. 普通异步电机在较低的频率下运行时还会出现转速不稳定、振动噪音增大、发热量增加等现象。即使采用电流矢量控制的方式也不能完全消除以上这些缺点。

3. The common asynchronous motor will appear unstable rotational speed, increased vibration and noise, increased calorific value when it runs at lower frequency. Even though the current vector control method can not completely eliminate these shortcomings.



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