ripple voltage

ripple voltage

[′rip·əl ‚vōl·tij]
(electricity)
The alternating component of the unidirectional voltage from a rectifier or generator used as a source of direct-current power.

Ripple voltage

The time-varying part of a voltage that is ideally time-invariant. Most electronic systems require a direct-current voltage for at least part of their operation. An ideal direct-current voltage is available from a battery, but batteries are impractical for many applications. To obtain a direct-current voltage from the alternating-current power mains requires using some type of power supply.

A typical linear power supply system configuration (see illustration) consists of a transformer to change the voltage at the mains to the desired level, a rectifier to convert the alternating-current input voltage v1 to a pulsating direct-current voltage v2, followed by a low-pass filter. The output voltage vout of the filter consists of a large direct-current voltage with a superimposed alternating-current voltage. This remaining superimposed alternating-current voltage is called the ripple voltage.

Practical linear power supplies often include a voltage regulator between the low-pass filter and the load. The voltage regulator is usually an electronic circuit that is specifically designed to provide a very stable dc output voltage even if large variations occur in the input. Nonlinear power supplies, which are often termed switching power supplies or switched-mode power supplies, are becoming increasingly popular as a practical alternative for producing a low-ripple dc output. See Electronic power supply, Rectifier

References in periodicals archive ?
The low frequency peak-to-peak ripple voltage across capacitor Cb, AVb-lf can be obtained as
The ripple voltage measurement in Figure 5 shows a spread of 547.
Output ripple voltage is reduced because of the devices 180 out-of-phase operation.
The second set of input ripple voltage spectrum measurements (after the filter was applied) is shown in pictures Fig.
Higher level of ripple voltage is less important because ADC reference voltage is generated by internal MC reference source, but not directly from power supply.
While in PWM mode, the frequency is constant and the frequency is altered to keep a constant Vout, and consequently, the output ripple voltage is larger.
An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors.
6]F) and observe the amplitude of the ripple voltage on the oscilloscope".
The result of the enhanced comparator circuits is a more stable ripple voltage.
One function of the capacitor bank is to act as a filter section (smoothing out AC ripple voltage on the bus).
As the input capacitors failed, the AC ripple voltage riding on the DC voltage supplied to the MOSFET switching transistors increased.