ripple voltage

ripple voltage

[′rip·əl ‚vōl·tij]
The alternating component of the unidirectional voltage from a rectifier or generator used as a source of direct-current power.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

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

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
More capacitance doesn't make the performance significantly better above some value, although the ripple voltage is improved.
Competing solutions require several external components when using all ceramic capacitors and needs to generate a larger output ripple voltage to stabilize the circuit.
Due to a ripple cancellation effect on the interleaved converters, the ripple voltage behavior of the capacitor differs slightly from the conventional buck converter.
Although the circuit structure is simple, it has a drawback in that maximum power efficiency is low and output ripple voltage is large.
where [DELTA][u.sub.s]--continuous component of the ripple voltage.
The low frequency peak-to-peak ripple voltage across capacitor Cb, AVb-lf can be obtained as
This decoupling topology in PWM utilised an auxiliary decoupling capacitor to reduce the usage capacitance in the converter and second-order ripple voltage on the DC-link.
Let q be the charge transferred from [C.sub.2n] to the load per cycle with a ripple voltage at capacitor [C.sub.2n] [15-17]:
(2) Capacitor Ripple Voltage. The current shown in (1) causes a voltage ripple in the capacitor.
The approximate voltage ripples assuming linear models and a small ripple voltage are given by [10]
The second set of input ripple voltage spectrum measurements (after the filter was applied) is shown in pictures Fig.