The wave output employs two D/A converters (DAC0832) one of which controls the voltage reference of the other converter in order that the peak-to-peak value of the end output wave varies from 0 to 5 volts stepped according 1 volt.
Comparison anddescription of the two influences are detailed throughillustration and theoretical analyses, then get to importantconclusions: the deviation voltage is in relative with the output current direction in hard-switching inverters while isunassociated in soft-switching inverters, which makes the quite differences in the output wave distortion principle and thecorrection strategies.
The essay discussed in detaily the following contents:(1) Described the two kinds of PWM modulation methods of carrier phase-shift in serial units mid-voltage frequency converter, and done simulation to the PWM modulation of carrier level phase-shift and vertical phase-shift ,analysised the output wave forms that under different modulation.
Cycloconverter can provide excitation for AC exciting generator(ACEM),but its control theory and calculation errors lead to the problem that there are aberrance and dissymmetry in the 3-phases output waves.
GaAs photoconductive detector responded to X-ray is reported as well as comparison on their output waves,which irradiated by none,electron or double proton beams. The results show that the detector's characteristics have been improved with double proton beams irradiation,and the effect treated by double proton beams was better than that by the electron.
Input and output wave filtering circuits and power-source coupling circuits are applied in power release,which make capacity abilities more power and output waves are steady authentic when connected to 4-ohm capacity.
The designed and developed 1kVA 220V ± 10%50HzAC/110V50HzAC prototype shows that the converters have perfect comprehensive performances such as good output waveforms,high efficiency,high power density,high line power factor,strong adaptability to various loads,strong over-load ability,low audio noise,small bulk and weight etc.
A designed and developed prototype for 3kVA 27VDC/200V400HzAC combined three-phase inverter with high frequency pulse DC link has excellent comprehensive performances such as small bulk, lower weight, high conversion efficiency, high steady precision, fast dynamic response, wide input voltage range, good output waveforms, strong over-load and short-circuit ability, and strong ability with different nature load and three-phase unbalanced load.
A designed and developed prototype for DC 3kVA 27V / AC 200V400Hz three-phase inverter with high frequency soft-switching has excellent comprehensive performances such as small bulk,lower weight, high conversion efficiency,high steady precision,fast dynamic response, wide input voltage range, good output waveforms, strong over-load and short-circuit ability, strong ability with different nature load and three-phase unbalanced load, and ZVS of the inverter bridge.
The macromodel ,which provides a good pin-to-pin representation,simulates very well the output waveforms of LM565 and models satisfactorily the controls of external elements over the performance of LM565. The macromodel can be used in computer-aided-analysis of the circuits containing LM565.