车载12v转220v逆变器电路图(CW3525A应用电路)
变器电路图(CW3525A应用电路)车载12v转220v逆
CW3525A设计的车载逆变器电路特点:(1)采用脉宽调制式开关电源电路,转换效率高达90%以上,自身功耗小;(2)输出交流电压220V,并且具有稳压功能;(3)输出功率30W,可以扩容至1000w以上;(4)采用2 kHz准正弦波形,无需工频变压器,体积小、重量轻。
正如图中所示,当VT1导通时(此时VT2截止),+12V电源通过变压器T初级上半部分(2端→1端)经VT1到地。
当VT2导通时(此时VTl截止),+12V电源通过变压器T初级下半部分(2端→3端)经VT2到地。通过变压器T的合成和升压,在T的次级即可获得220V的交流电压,其频率约为2kHz。由于变压器线圈对高频成分的阻碍,次级波形已不是方波,可称之为准正弦波。采用较高频率的准正弦波形,有利于提高效率和革除工频变压器,也能使大多数电器正常工作。
This vehicle-mounted inverter circuit is actually a digital quasi-sine wave DC/AC inverter with the following characteristics: (1) It adopts a pulse width modulation switching power supply circuit with a conversion efficiency of over 90% and low power consumption; (2) The output AC voltage is 220V, and it has a voltage stabilizing function; (3) The output power is 30W, which can be expanded to more than 1000w; (4) The 2 kHz quasi-sine waveform is adopted, without a power frequency transformer, and it is small in size and light in weight.
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