Perhaps because it may use DC to do the measurement and that may effect the core of the trafo? // The D.C. could leave a bit of magnetism residue in the core. Best way to fix that is to run some AC through the transformer to demagnetize it. Music signal could work for small sig...
Briefly explain how an alternating current transformer works. And why are alternating current transformers so important to the world? Why does an electric fan continue to rotate for some time after the current is switched off? Explain the heating effect of electric current. ...
a电压比相等,其电压比最大允许相差为±5%; The transformer copper loss refers to the loss which at the beginning of the secondary wire DC resistance creates, therefore only needs the transformer on to add on the nominal current then, the concrete operation is the secondary coil direct pipe nipple...
That solves the shock hazard, but if there is still a long distance for the true ground, audio and video can still pick up a “ground wave” from a wiring reversal and be introduced into the equipment by the chassis ground, bypassing the transformer and bridge circuit. In fact, lifting ...
1: Literally unplugging the device. Leaving it physically plugged and just flipping a power switch instead often doesnotremove power from absolutely everything. 70 comments on “Reboot or Power Down: Why Do So Many Tech Support Solutions Start with That?”...
There are several design choices: • Starting from a typical AC outlet, a step-up transformer could be directly used, with the AC rectified to DC just prior to the final output. These transformers have marginal cost, and the output would be fixed. • Starting from a typical AC outlet,...
Analog Dialogue Volume 47 Number 1 27 Figure 3 shows two different setups: Figure 3(a), which uses passive coupling to the converter, is available as the default option on the customer evaluation board. The passive front-end network uses a transformer or balun to convert the single-ended ...
The power cable is effectively part of the primary winding of the power transformer. The transition between the various metals used in a power cable and its connectors can cause electromagnetic reflections and diode-like rectification of the noise impulses as they propagate away from the power ...
Furthermore, I changed the power input from 120VAC to 12VDC and consolidated the transformer functions formerly on 4 computers onto one high-efficiency (92% with power factor of .9) transformer which serves all 4 computers. There are many, many things that can be done on supply side and...
Antique radio guys use a variac (variable AC transformer) to start out old radios at a much lower voltage for this reason. Also some caps will decrease in value if used too far below their rated voltage. (Caps that do this are usually, but not always, electrolytic.) And then there was...