Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Control Mode Switching of Induction Machine Drives between Vector Control and V/f Control in Overmodulation Range

  • Received : 2011.06.15
  • Published : 2011.11.20
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Abstract

This paper proposes a control mode switching scheme between vector control and constant V/f control for induction machine (IM) drives for maximum torque utilization in a higher speed region. For the constant V/f scheme, a smooth transition method from the linear range of PWM up to the six-step mode is applied, by which the machine flux and torque can be kept constant in a high-speed range. Also, a careful consideration of the initial phase angle of the voltage in the transient state of the control mode change between the vector control and V/f schemes is described. The validity of the proposed strategy is verified by the experiment result for a 3-kW induction motor drives.

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References

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