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Ripple Factor
DC voltage AC voltage direct current power supplies are obtained through the correction of semiconductor elements. In addition to the desired value of voltage correction process needs to be set. These transactions occurred voltage waveform is disturbed.The resulting DC voltage of the system because of the nature of chemical sources, such as battery or the battery is obtained from the linear up. DC output voltage is analyzed with an appropriate instrument descend increased tension between the observed value of the specific values.This fluctuation in the DC voltage ripple is called. DC voltage ripple factor, is expressed as a percentage of the effective components of the mean.
As noted above, to adjust the input or output voltage control method is applied. In this process control elements in proportion to the output voltage allows the passage of a particular part of the AC voltage.Large portion of the output voltage is higher than the permitted when necessary AC voltage, low voltage section is allowed for less. In practice, this rate is the firing angle (unit degrees (°)) is expressed. Triggering angle, depending on the number of phases used in obtaining the DC 0-180 ° or 0-120 ° range. 0 ° the low-voltage, high value means that the maximum output voltage. Ripple factor varies depending on the angle of the trigger. Triggering the rectifier DC output voltage increases with increasing angle. 300Hz systems, a angle of 0 ° to 60 ° while an increase of ripple factor deteriorates. In this case 60 ° in the worst-case value is 26.75%. 60 ° from the start to improve after the ripple factor and the maximum ripple factor is 4.19%. 600Hz systems, while a 30 ° angle with the value of ripple factor of 14.66% is the worst. 1.02% maximum ripple factor is. Therefore, thyristor systems, the device operating voltage of the output voltage ripple values are relatively low will result in the appropriate selection.Also used in the output of L (inductance, Shock Coil), better results can be achieved with the help of the output signal. Below 300Hz and 600Hz various triggering angles rectifiers and ripple of the output signals are factors.
600Hz Output voltage rectifier is made using a second group of courses. This is achieved by sliding the second group of 30 °.
Variac Systems as the voltage setting is different for semiconductors without the possibility of setting an operation on an alternative signal that the ripple factor remains constant.This 300Hz ripple factor systems, fixed 4.19%, 1.02% and 600Hz systems, the fixed value. Only the amplitude of the output signal is done by changing the setting. Thus, at full load with the value obtained from the semi-load ripple ripple value remains the same. |
