Single-polarity-controlled three-phase two-level inverter space voltage vector modulation algorithm
A technology of space voltage vector and modulation algorithm, applied in the direction of control system, AC motor control, electrical components, etc.
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[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] The main circuit of the algorithm of the present invention is as figure 1 The main circuit of the three-phase two-level voltage type inverter is shown.
[0019] The figure shows a three-phase two-level voltage inverter, and the load is a three-phase motor. In actual use, the motors can be connected in star or delta as shown in the figure.
[0020] Upper tube VT 1 and down tube VT 4 It is a switching tube with two internal parallel diodes (insulated gate bipolar transistor IGBT, or metal oxide silicon field effect transistor MOSFET), and the two tubes form a half bridge called bridge arm a. VT 3 and down tube VT 6 Form bridge arm b, VT 5 and down tube VT 2 Form bridge arm c. Similarly, the three output terminals a, b, and c of the three bridge arms are respectively connected to one end of the three-phase winding of the motor (t...
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