Transformer-free unilateral inductor grid-connected inverter circuit
A technology of inverter circuit and transformer, applied in the field of unilateral inductance grid-connected inverter circuit, can solve the problems of electromagnetic interference, large common mode current, heavy weight, etc., and achieve the effect of good electromagnetic compatibility, small components and low cost
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[0035] Example 1:
[0036] The two high-frequency switching tubes S3 and S4 and the two low-frequency switching tubes S1 and S2 use insulated gate bipolar transistors (IGBT) respectively. The circuit principle is as follows figure 2 As shown, the emitter of the switching tube S3 is connected to the collector of the switching tube S4, the collector of the switching tube S3 is connected to the positive input of the solar cell, and the emitter of the switching tube S4 is connected to the negative input of the solar cell. The emitter of the switching tube S1 is connected to the collector of the switching tube S2, the collector of the switching tube S1 is connected to the positive electrode of the solar cell input, and also connected to the collector of the switching tube S3, and the emitter of the switching tube S2 is connected to the solar cell. The negative pole of the input is also connected to the emitter of the switching tube S4 at the same time, and the grids of the two low-fre...
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[0046] Example 2:
[0047] The two high-frequency switching tubes S3 and S4 and the two low-frequency switching tubes S1 and S2 use power field effect transistors (MOSFET) respectively. The circuit principle is shown in Figure 11, where the source of the switching tube S3 and the drain of the switching tube S4 The drain of the switch tube S3 is connected to the anode of the solar cell input, and the source of the switch tube S4 is connected to the cathode of the solar cell input. The source of the switching tube S1 is connected to the drain of the switching tube S2, and the drain of the switching tube S1 is connected to the anode of the solar cell input and also connected to the drain of the switching tube S3. The source of the switching tube S2 is connected to the solar battery. The negative pole of the input is connected to the source of the switch S4 at the same time, and the grids of the two low-frequency switch tubes S1 and S2 are respectively connected to the speed control ...
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