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The use of series connected capacitors for high voltage applications has been proven to be beneficial for voltage stress reduction across power semiconductors. In a 3-phase grid any asymmetry in the value of the series capacitance may lead to significant variations in the voltage seen across the low voltage converter. This paper investigates the effects of an unbalanced set of series connected capacitors...
Direct torque control (DTC) scheme is quite popular in a voltage source inverter fed induction motor (IM) drive. Considering a switching table based algorithm, the flux and torque are directly controlled by applied inverter voltage vectors. There is a direct relation between stator flux and applied inverter voltage vector, which is eventually the stator voltage vector. However, in a current source...
Brushless permanent magnet (PM) drive systems offer a high efficiency over a wide power/torque-speed operating envelope, however, there are a number of problems that may limit, or complicate, their operation particularly in automotive and aerospace vehicular applications, i.e. the loss of control of the power silicon gate drive circuitry during flux-weakening operation, control of high-speed low-inductance...
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