Direct torque control device and method for asynchronous motor
A direct torque control, asynchronous motor technology, used in motor generator control, AC motor control, electronically commutated motor control, etc.
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[0056] The direct torque control device of the asynchronous motor of the present invention, refer to Figure 10 , including asynchronous motors and high-voltage matrix inverters, refer to Figure 8 , that is to connect the three output terminals U, V, W of the high-voltage matrix inverter with an asynchronous motor. The high-voltage matrix inverter includes a phase-shifting isolation transformer, a matrix transformation unit array and a general controller, among which:
[0057] 1) Phase-shifting isolation transformer
[0058] refer to Figure 8 , The phase-shifting isolation transformer has 3n three-phase secondary windings, n is a natural number, every 3 secondary windings form a group and have the same phase, the phases of each group of secondary windings increase in turn, the initial phase is 0°, adjacent The phase difference between them is 60 / n degrees. In the embodiment of the high-voltage matrix converter of the present invention, n is a natural number 3. The three...
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