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The ultrasonic spindle is well-known as one of the processing equipment and has high-machining performances. An ultrasonic transducer used for the ultrasonic spindle drive is usually driven by high-frequency sinusoidal voltage. To supply this sinusoidal voltage to the ultrasonic transducer attached to the rotary axis, a rotary transformer, instead of the voltage transfer method using a brush and a...
In this paper, seamless model of bi-directional DC-DC converter which is applicable to bi-directional power transfer is proposed. Conventional modeling method of bi-directional DC-DC converter is complex, because different models are needed for different directions of power flow. On the other hand, seamless model can be applied for both directions of power flow. Seamless circuit model is expressed...
The Power Supply Working Group, created inside the Cooperative Study Group on “Applied Simulations of Power Electronics Systems” of IEEJ, is developing practical simulation examples of power supply circuits. The simulation examples have the following key features: (1) Parameters in the simulation examples are thoughtfully set to practical values so that one can readily carry out practical simulations...
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