Table of Contents
How do you obtain steady DC output from the pulsating voltage?
The simplest way to obtain a steady DC output from the pulsating voltage is using a rectifier and then a capacitor. By using a half wave or full wave rectifier you can cancel the negative part if the pulsating voltage. This is done when a diode is connected in series with the input voltage.
How do you get pure DC?
Obtaining Pure DC from Pulsating DC The pure DC power can be obtained from pulsating DC using filter circuit (L-filter or C-filter or RC-coupled filter can be used to remove the ripples). The C-filter is frequently used for smoothing purposes.
What is meant by rectifier filter?
We have learnt in rectifier circuits about converting a sinusoidal ac voltage into its corresponding pulsating dc. The filter is a device that allows passing the dc component of the load and blocks the ac component of the rectifier output.
Which of the following can be used to convert pulsating DC to DC?
Rectifier circuit converts a sinusoidal AC voltage into its corresponding pulsating DC.
How can we remove ripples?
The ripple can be reduced by smoothing capacitors which converts the ripple voltage into a smoother dc voltage. Aluminum electrolytic capacitors are widely used for this and have capacitances of 100uF or more. The repeated dc pulses charges the capacitor to the peak voltage.
What is the frequency of pulsating DC?
By definition, DC means Direct Current which does not alternate. In the case of rectified AC, it could be called pulsating DC; with a frequency of 1 or 2x the AC, depending on rectification method.
How can I get pulsating DC from pure DC?
The easiest way of obtaining pulsating DC from pure DC is by using a switch Close the switch for sometime. You get pure DC. Open the switch for sometime. You get zero output. Keep doing this continuously and voilà! You have pulsating DC.
What is pulsating DC and ripple voltage?
Fluctuating DC directly from a rectifier is called pulsating DC (dotted line). Adding a capacitor in parallel (called a reservoir capacitor) removes most of the pulses and gives a DC with ripples and is called a ripple voltage (red line).
How to get pulsating DC from an oscillator?
To obtain pulsating DC, use rectifier after oscillator, i.e. output of oscillator is connected to rectifier. For frequency upto 1 KHz, normal rectifier diode will work. For higher frequency use point contact diode or diodes used for high frequency rectification.
What voltage do you run your DC servo motor at?
I have a DC servo motor that I bought used, rated at 24V maximum, with variable RPM depending on how many volts I supply to it. The motor works fine when I connect it to a 9V battery, but pulses and drains a connected power supply periodically (every second or so).