# Tag Info

Accepted

### How is the reactance of a capacitor formulated?

The math Consider this linear differential equation with real coefficients $$\frac{\text{d}\ y(t)}{\text{d}t} + a_0y(t) = b_0x(t) \tag1$$ Assume now that the input and output are complex valued ...
• 4,145

### Food for thought: Which person has truth in this discussion on capacity and AC?

person1: AC voltage 'flows' even through insulator, fact. False, category error. Voltage doesn't flow, current flows. We could say that it's sort of true about insulators, if you are allowed to ...
• 169k

### I'm trying to wire this motor I have, but I'm not sure how to read this diagram

You are correct. This is a split-phase, capacitor-start induction motor. It runs from a single phase AC power source. How it works: For the higher voltage, the two "A" phase coils are ...
• 11.6k
Accepted

### AC Stepdown transformer blown troubleshoot

What would cause a transformer to fail across the primary, from simply switching a breaker off, then back on? It cooled down when the breaker went off then, it warmed up when the breaker was ...
• 465k

### What is the role for each of these AC coupling components?

Multiple components do multiple things. And this isn't simply just AC coupling any more. It's much more than that. R1 220 ohms rises the digital buffer IC output impedance, i.e. it limits the current ...
• 159k

### What is the role for each of these AC coupling components?

A PWM signal swinging between 0 and a positive peak can be considered as the sum of an AC signal and a DC offset. DC offset is the avg (mean) value which is equal to the duty-cycle of the PWM signal ...
• 36k

### Non contact AC voltage detector circuit current calculation

Realize that this circuit was most likely created by a hacker, not an Engineer. Its characteristics are highly dependent on the beta of the transistors. An ESD discharge to the input will most likely ...
• 16.5k

### How is the reactance of a capacitor formulated?

How exactly does the reactance formula Xc=1ωC come about? $\mathbb{V}=V_0\exp\left(j\,\omega t\right)$. (Note: The vector length is unchanging. It's tip forms a helix traveling in time. A voltage ...
• 11.2k
1 vote

### 3-Phase system Voltage conversion

Made with microcap v12. You can construct the "voltages" using a simulator. Just see this. Just a difference of "30°". R, S, T in that order ... R-S, S-T, T-R ...
• 14.5k
1 vote

### How is the reactance of a capacitor formulated?

In an ideal capacitor, there are no parasitic resistances so the real component to the impedance is just zero and the phase angle is -90 degrees or -j. It can also be written as Z = 0 - jωC. In real ...
• 20.3k
1 vote
Accepted

### How to find the power factor of a component when the combined power factor and one other power factor is known?

As you correctly surmised, you can't add the magnitudes of complex power as ChatGPT says because they're vectors, but you can add them as vectors. Please forgive my drawing skills. Edit: the ...
• 20.3k

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