Fig 7 - uploaded by M. I. Karamangil
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Class-D high voltage power amplifier schematic In the Fig. 8 the output waveform of the Class-D high voltage power amplifier is shown as a simulation result.
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Volumetric efficiency is the main parameter that characterizes the increase in power of an engine at the same speed. A group of design parameters that affects the volumetric efficiency are opening-closing characteristics of the valves (opening and closing times, valve lift and shape of cam lobe). But the same values of these parameters in various s...
Contexts in source publication
Context 1
... the other hand, the Class-D amplifier uses the PWM technique. Power transistors at the output stage of HVPA working in switching mode and have only conduction and switching losses and so efficiency is high [20]. A Class-D amplifier is shown in Fig. 7 consists of PWM controller, isolated gate drivers, and for the output stage, totem-pole connected n-type power transistors (MOSFETs or IGBTs). This circuit is drawn using LT-spice XVII and simulated with the same tool. ...
Context 2
... corresponding valve opening size. The address pointer indicating this row takes its value from current crankshaft angle. Obtained PWM pulse signals from peripheral outputs of MCU is sent to gate terminals of totem pole connected power MOSFETs via inductively coupled isolated gate drivers (see Fig. 9). The power output stage of Class-D HVPA in Fig. 7 can be connected to peripheral outputs of MCU via the level shifter. The correlation between the electrical current and the velocity, respectively the electrical charge and the displacement of the piezo actuator is free of hysteresis. Contrarily to this, the correlation between the voltage and the displacement is hysteretic, but ...
