Many enterprises realize that the energy consumption of air compressors is huge. In order to save production costs and reduce energy consumption, they begin to carry out energy-saving transformation of high energy consumption equipment such as air compressors. Have you ever heard of the energy-saving transformation of soft start air compressor? Today, Xiaobian will take you to see what is soft start?

軟啟動(dòng)器是如何實(shí)現輕載

How does soft starter realize light load and energy saving

籠型異步電機是感性負載，在運行中，定子線(xiàn)圈繞組中的電流滯后于電壓。如電機工作電壓不變，處于輕載時(shí)，功率因數低，處于重載時(shí)，功率因數高。軟起動(dòng)器能實(shí)現在輕載時(shí)，通過(guò)降低電機端電壓，提高功率因數，減少電機的銅耗、鐵耗，達到輕載的目的；負載重時(shí)，則提高電機端電壓，確保電機正常運行。

Cage induction motor is an inductive load. In operation, the current in the stator coil winding lags behind the voltage. If the working voltage of the motor remains unchanged, the power factor is low under light load and high under heavy load. The soft starter can achieve the purpose of energy saving under light load by reducing the motor terminal voltage, improving the power factor and reducing the copper and iron consumption of the motor; When the load is heavy, increase the motor terminal voltage to ensure the normal operation of the motor.

軟啟動(dòng)器適用于哪些場(chǎng)合

Where is the soft starter suitable

原則上，籠型異步電動(dòng)機凡不需要調速的各種應用場(chǎng)合都可適用。目前的應用范圍是交流380V（也可660V），電機功率從幾千瓦到800kW。軟起動(dòng)器特別適用于各種泵類(lèi)負載或風(fēng)機類(lèi)負載，需要軟起動(dòng)與軟停車(chē)的場(chǎng)合。同樣對于變負載工況、電動(dòng)機長(cháng)期處于輕載運行，只有短時(shí)或瞬間處于重載場(chǎng)合，應用軟起動(dòng)器則具有輕載的效果。

In principle, the cage asynchronous motor can be applied to various applications where speed regulation is not required. The current application range is AC 380V (or 660V), and the motor power ranges from thousands of watts to 800KW. The soft starter is especially suitable for various pump loads or fan loads where soft start and soft stop are required. Similarly, the application of soft starter has the effect of light load and energy saving for variable load conditions, long-term light load operation of motor and only short-term or instantaneous heavy load.

變頻器是把工頻電源(50Hz或60Hz)變換成各種頻率的交流電源，以實(shí)現電機的變速運行的設備。其中控制電路完成對主電路的控制，整流電路將交流電變換成直流電，直流中間電路對整流電路的輸出進(jìn)行平滑濾波，逆變電路將直流電再逆變成交流電。對于如矢量控制變頻器這種需要大量運算的變頻器來(lái)說(shuō)，有時(shí)還需要一個(gè)進(jìn)行轉矩計算的CPU以及一些相應的電路。

Frequency converter is a device that converts power frequency power supply (50Hz or 60Hz) into AC power supply of various frequencies to realize variable speed operation of motor. The control circuit controls the main circuit, the rectifier circuit converts AC into DC, the DC intermediate circuit smoothes the output of the rectifier circuit, and the inverter circuit reverses DC into AC. For a frequency converter that needs a lot of calculation, such as vector control frequency converter, sometimes a CPU for torque calculation and some corresponding circuits are needed.