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ABSTRACT: Brushless dc motor has been widely used in industrial applications because of its low inertia, fast response, high power density, high reliability and maintenance-free. It is usually supplied by a hard-switching pulse-width modulation inverter, which is normally relative low efficiency since the switching power losses across the switching devices are high. In order to reduce the losses, a lot of soft switching inverters have been designed. Unfortunately, there are many drawbacks, such as high device voltage stress, large dc link voltage ripple, complex control scheme and so on. This paper introduces a soft-switching inverter based on transformer which can generate dc link voltage notches during chopping switches commutation to guarantee all switches working in zero voltage switching condition. The operation principle and control scheme of the inverter are analyzed. Simulation and experimental results are proposed to verify the theoretical analysis.
IEEE Transactions on Power Electronics 08/2005; · 4.65 Impact Factor
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ABSTRACT: The brushless dc motor (BDCM) has been widely used in industrial applications because of its low inertia, fast response, high power density, high reliability, and maintenance-free reputation. It is usually supplied by a hard-switching pulse width modulation inverter, which normally displays relative low efficiency since the power losses across the switching devices are high. In order to reduce the losses, many soft switching inverters have been designed. However, these inverters have such disadvantages as high device voltage stress, large dc link voltage ripple, discrete pulse modulation, and complex control scheme. This paper introduces a novel resonant pole inverter, which is unique to a BDCM drive system, and is easy to implement. The inverter possesses the advantages of low switching power loss, low inductor power loss, low device voltage stress, and simple control scheme. The operation principle of the inverter is analyzed. Simulation and experimental results are proposed to verify the theoretical analysis.
IEEE Transactions on Power Electronics 02/2005; · 4.65 Impact Factor
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ABSTRACT: Brushless DC motor has been widely used in industrial applications because of its low inertia, fast response, high power density, high reliability and maintenance-free. It is usually supplied by a hard-switching PWM inverter, which normally has low efficiency since the power losses across the switching devices are high. In order to reduce the losses, many soft switching inverters have been designed. Unfortunately, there are many drawbacks, such as high device voltage stress, large DC link voltage ripple, complex control scheme and so on. This paper introduces a novel soft-switching inverter which generates notches of the DC bus voltage becomes to zero during chopping switches commutation to guarantee all switches working in zero voltage state. The result of this investigation will be very useful for industrial applications.
IEEE Transactions on Power Electronics 04/2004; · 4.65 Impact Factor
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Zhi Yang. Pan
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ABSTRACT: "Supervisor, Associate Professor Luo Fang Lin." Thesis (Ph.D.)--Nanyang Technological University, School of Electrical and Electronic Engineering, 2006.
