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A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor

The results prove the excellent characteristics for torque response and efficiency, which confirm the validity of this quick-response and high-efficiency control of an induction motor.
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A New Neutral-Point-Clamped PWM Inverter

The neutral-point-clamped PWM inverter adopting the new PWM technique shows an excellent drive system efficiency, including motor efficiency, and is appropriate for a wide-range variable-speed drive system.
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Direct power control of PWM converter without power source voltage sensors

This paper proposes a novel control strategy of a PWM converter with no power source voltage sensors. The strategy has two features to improve a total power factor including harmonic components…
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High-performance direct torque control of an induction motor

A novel direct torque control method for an induction motor is presented which is quite different from field-oriented control. Improving the torque response of a large-capacity induction motor using…
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Active EMI filter for switching noise of high frequency inverters

In high frequency inverter fed AC motor systems, high frequency leakage current generated by high dv/dt at switching times flows to the ground wire through the stray capacitor between motor windings…
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Enlarging switching frequency in direct torque-controlled inverter by means of dithering

This paper presents a novel, simple method to enlarge switching frequency in the direct torque-controlled inverter for an induction motor drive, which makes an acoustically silent motor operation…
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High frequency switching operation of PWM inverter for direct torque control of induction motor

The paper presents a novel simple method for high frequency switching operation of a PWM inverter for the direct torque control of an induction motor, which makes an acoustically silent drive…
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Electrolytic Capacitor-less PWM Inverter

Development of long life three phase uninterruptible power supply using flywheel energy storage unit

According to the development of computer applications, uninterruptible power supplies (UPS) are indispensable to the industrial field. But the cost of maintaining a conventional UPS is very high,…
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A super high speed PM motor drive system by a quasi-current source inverter

The authors describe a surface-mounted PM (permanent magnet) motor with the ratings of 5 kW and 180000 RPM for super-high-speed drive applications such as machine tools. A much larger air gap,…
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