按變換的環(huán)節(jié)分類：
（1）交-直-交變頻器，則是先把工頻交流通過整流器變成直流，然后再把直流變換成電壓可調的交流，又稱間接式變頻器，是目前廣泛應用的通用型變頻器。
（2）可分為交-交變頻器，即將工頻交流直接變換成電壓可調的交流，又稱直接式變頻器
按直流電源性質分類：
（1）電壓型變頻器
電壓型變頻器特點是中間直流環(huán)節(jié)的儲能元件采用大電容，負載的無功功率將由它來緩沖，直流電壓比較平穩(wěn)，直流電源內阻較小，相當于電壓源，故稱電壓型變頻器，常選用于負載電壓變化較大的。
（2）電流型變頻器
電流型變頻器特點是中間直流環(huán)節(jié)采用大電感作為儲能環(huán)節(jié)，緩沖無功功率，即扼制電流的變化，使電壓接近正弦波，由于該直流內阻較大，故稱電流源型變頻器（電流型）。電流型變頻器的特點（優(yōu)點）是能扼制負載電流而急劇的變化。常選用于負載電流變化較大的。
【公 司】： 福建鴻飛達自動化科技有限公司福建省福州市高新區(qū)新保路正榮財富中心SOHO B幢8樓
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