Shiori Yoshioka

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This paper proposes a new position sensorless control for interior permanent-magnet synchronous motor (IPMSM) drives fed by overmodulation mode pulsewidth modulation (PWM) voltage source inverter. It is attractive to expand the speed range of the IPMSM for application to electric vehicles, electrical household appliances, and so on. An overmodulation mode(More)
Inefficient channel utilization is still a serious problem in wireless LANs. One of effective solutions is to decrease the frequency of packet loss. While the backoff algorithm in IEEE 802.11 avoids only the packet loss caused by collision, other previous works that prevent the packet loss caused by channel fading improve channel utilization with(More)
Recently, wireless LANs are utilized in various situations. However, inefficient channel utilization is still a serious problem. One of effective solutions is to prevent packet loss and to transmit packets at a higher rate. While the backoff algorithm in IEEE 802.11 avoids only the packet loss caused by collision, other existing works tackle the packet loss(More)
This paper proposes a new position sensorless control for interior permanent magnet synchronous motor(IPMSM) drives fed by over-modulation mode PWM voltage source inverter. Overmodulation mode PWM voltage source inverter makes it possible to solve some problems such as efficiency, wide speed range operation and so on. Most position sensorless control based(More)
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