A single VRM circuit can be effective enough for certain applications, but to ensure as smooth a voltage delivery as possible, you can have multiple VRMs in parallel, creating what we have already mentioned –a multi-phase VRM(the image above represents a multi-phase VRM). How does this work?
VRM works in multiple phases in parallel to distribute the load and improve the overall efficiency. Inductors play a crucial role in storing and releasing energy that aids a constant supply of voltage. Modern VRMs come with a Pulse Width Modulation (PWM) controller that regulates voltage by adjus...
In sinusoidal steady state (let's ignore harmonics for simplicity), v(t)=2–√Vrmscos(ωt+ϕv)v(t)=2Vrmscos(ωt+ϕv) and i(t)=2–√Irmscos(ωt+ϕi)i(t)=2Irmscos(ωt+ϕi), where ωω and T=2π/ωT=2π/ω are respectively the angular frequency and period...
Non-TRMS meters measure the peak voltage/current of the input signal and multiply by 0.707 which corresponds to the relationship between the peak voltage and root mean square voltage of a sine wave. The result is if you measure a 1Vrms square wave, a non-TRMS meter usually reports something...
0dB means that the measured value is the same as the reference. Note that this does not mean there is no power or signal. Noise floor Any practical measurement will be subject to some form of noise or unwanted signal. In acoustics, this may be background noise, or in electronics, there...
electrical equipment should present a load that emulates a pure resistor, meaning that the reactive power would be zero. And the current and voltage waveforms would be the same sine wave and in phase with one another. However, due to the reactive components in a majority of circuits, there ...
This will typically occur when the control loop is unable to respond fast enough to a transient that is excited on the power rail. The most common instance where this occurs in on VRMs that supply high current/low voltage to large digital processors. When the processor is running, large tran...
Supply voltage: 240 Vrms, 339.4 Vpeak Resistor current: 200 Arms (282.8 pk) Inductor current: 150 Arms (212.1 pk) Supply current: 250 Arms (353.8 pk) Power: 48 kW (96 pk-pk) Reactive power: 36 kVAR (72 pk-pk) Apparent power: 60 kVA (120 pk-pk) there's no net energy transferred...