Shinji Shinnaka

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Phase, frequency, and amplitude of single-phase voltages are the most important and basic information required for single-phase grid-connected applications. This paper proposes a method for instantly and robustly estimating the phase, frequency, and amplitude of frequency-varying single-phase signals for such applications, which is a phase-locked loop (PLL)(More)
  • S. Shinnaka
  • 2004
This paper proposes a new sensorless vector control method for a salient-pole permanent-magnet synchronous motor (SP-PMSM). The proposed method is directly based on a new principle called "mirror-phase characteristics" and has the following high-performance and attractive features: 1) it can allow 250% rated torque at standstill, under which strong flux(More)
  • S. Shinnaka
  • 2008
This paper proposes a new sensorless vector control method for salient-pole permanent-magnet synchronous motors. With regard to phase estimation, the sensorless vector control method is featured by a new high-frequency voltage injection method (i.e., carrier modulation method), which is distinguished from the conventional ones by a unique ellipse shape of(More)
  • S. Shinnaka
  • 2005
This paper proposes a new sensorless vector control method that can be applied to both salient-pole and nonsalient-pole permanent-magnet synchronous motors (PMSMs). The proposed method estimates phase of rotor flux by a newly developed flux-state observer for sensorless vector control of PMSMs, which is referred to as the "D-state observer". The D-state(More)
This paper proposes a new sensorless vector control method for energy-efficient and wide-speed-range drives of permanent-magnet synchronous motors. The proposed sensorless method has the following features: 1) wide-speed-range drive under voltage limit; 2) current limitation; and 3) high efficiency. These features are realized in a very simple manner and(More)
  • S. Shinnaka
  • 2006
Almost all methods for sensorless drive of permanent-magnet synchronous motors (PMSMs), which estimate the rotor phase using fundamental components of the stator voltage and current, cannot operate properly at low speeds including standstill. For proper sensorless drives of PMSMs, they must be started and driven up to a certain speed by other methods. This(More)
  • S. Shinnaka
  • 2005
This paper proposes a new well-organized dynamic mathematical model and new dynamic vector simulators for newly emerging self-excited hybrid-field synchronous motors (SeIE-HFSM) that have rotor field by both permanent magnet and diode-shorted field winding. The proposed new mathematical model has the following completeness and generality: 1) it consists of(More)
  • S. Shinnaka
  • 2001
This paper proposes a new n-th order two-input/output filter in a module for two-phase signal processing. The filter can make a distinction between positive and negative frequencies of two-phase signals and can allow one to process the signals based on frequency-polarity. The filter can also change dynamically its filtering characteristics by simply(More)
  • S. Shinnaka
  • 2004
This paper proposes a new sensorless vector control method that can be applied to both of salient-pole and non-salient-pole permanent magnet synchronous motors (PMSM). The proposed method estimates phase of rotor flux by newly developed flux state-observer for sensorless vector controls of PMSM, which is referred to as "D-state-observer". The(More)
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