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AN2388 bảng dữ liệu(PDF) 21 Page - STMicroelectronics

tên linh kiện AN2388
Giải thích chi tiết về linh kiện  Sensor field oriented control
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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AN2388 bảng dữ liệu(HTML) 21 Page - STMicroelectronics

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AN2388
Vector control of AC induction machines
21/54
Figure 17.
Each of the vectors U0, U60, etc., in the diagram represent the six voltage steps developed
by the inverter where the zero voltages 0000 and 0111 are located at the origin. At each of
these states the inverter transistors are in steady state. In order to develop a sine wave at
the motor then we must devise a switching pattern that produces a voltage at not only the six
vectors states but also one which transitions in between these states. This effectively means
producing a continuously rotating vector Uout that transition smoothly from state to state.
SVPWM seeks to average out the adjacent vectors for each sector. Using the appropriate
PWM signals a vector is produced that transitions smoothly between sectors and thus
provide sinusoidal line to line voltages to the motor.



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