# Questions tagged [phase]

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### Constructive Interference of two AC waveforms [closed]

Is this correct? We have two AC waveforms of the same phase. 4000V 0.03 amps -> 120W 12V 60 amps -> 720W Total Watts 840W If these two waves undergo constructive interference: 4012 * 60.03 -&...
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### Why this motor shows delta 220 / star 380 which is usually the other way round from what I know? [closed]

Brand new induction motor arrived in the factory,it comes with gearbox on top controlled by VFD, but I could not understand it's nameplate, it should have shown just delta / star without voltage ...
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### Computing System Noise from Phase and Magnitude Response of Black Box Circuit

You are given a black box circuit of passive elements with a single input and output. You have the ability to sweep it's phase and magnitude response. Will you also be able to compute it's noise PSD ...
• 4,499
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### What is the effect of the capacitor on the input power and torque of permanent split capacitor (PSC) single phase induction motor?

I need to know the effect of the capacitor on the input power and torque of a permanent split capacitor (PSC) single phase induction motor.
56 views

### RC 90 deg phase shift

What does 90 deg phase shift actually mean? Like, consider this below RC circuit. simulate this circuit – Schematic created using CircuitLab From what I understand, when I apply a sine wave at ...
• 2,424
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### Problems of optimal commutation depending on number of pole

I am trying to design a three phase 4 pole motor, control with six-step. My problem appears when I draw the commutation to try to see how everything work. First, with a basic three phase 2 pole, there ...
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1 vote
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### Conceptual understanding of phase power vs. line power

I am looking at two formulas: P = √3 x VL x IL x Cos Ф P = 3 x VPh x IPh x Cos Ф Now assuming P here refers here to the total power. Could I take VPh and IPh and combine those terms as P (Phase)? Same ...
• 13
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### A non-inductive behavior in low frequency of an inductor

I have a question that has been torturing me for a while now. I cannot give you guys all the information, however, what I can say is that I have this measurement of an impedance of an electrical ...
• 309
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### How to get I and Q components from echoes of a Chirp signal?

The Bandwidth of the signal is 10 MHz, the central frequency is 20 MHz, sampling frequency is 26.6 MHz. So, if to get the Quadrature component I have to shift the signal of 90°, how do I get the phase ...
53 views

### LTspice AC Analysis extracting only the phase shift value at a certain frequency

I am trying to extract the phase shift value at a certain frequency in AC Analysis mode of LTspice. .meas AC Ph_Shift FIND (V(out)/V(in)) WHEN FREQ=50 With the ...
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1 vote
59 views

### How consistent is phase on the National Grid?

How consistent is phase on the National Grid in the UK? If I have a device plugged into a socket in Scotland and another down in Cornwall, how far out of phase will the two AC sine waves be? I have a ...
• 1,719
1 vote
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### Making 2 clocks with phase shift

I'm trying to create 2 clocks with phase shift for 1/4 cycle time: ...
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### 220 volt, three phase issue

My company had a machine moved from one facility to another. The machine was fully operational when it was disconnected. It operates on 220V three phase power. When powered up at the new facility the ...
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### Magnitute and phase, operational amplifier

I was solving exercises related to operational amplifiers and I got to a part where I am not sure how I am getting the arg part of the result. Can someone please explain this to me. Thank you very ...
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### Noise in tunable sine wave oscillator

I recently soldered a tunable phase shift oscillator on a bread board pcb. It produces a sine wave in the range from 80 Hz to 3,3 kHz. The oscillator frequency is tuned with a dual 100k potentiometer. ...
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1 vote
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### Loudspeaker alignment graph

Hopefully a simple question. I was wondering what the blue line in this graph represents. This is looking at loudspeaker modelling. The red line is obviously the frequency response as loudspeakers are ...
328 views

### Why multiple series resistor on single phase metering reference design with HLW8012 and BL0937 IC

We need to implement energy monitoring in our smart plug. We are considering 2 ICs HLW8012 and BL0937 for this purpose and following are their reference designs in their data sheets. I am trying to ...
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1 vote
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### How to reconstruct phase data from magnitude only data in a frequency domain function?

I'm trying to do a reverse-engineering a software called LEAP from the now disappeared LinearX company. This software can perform an operation called "Minimum Phase Transform". This takes ...
1 vote
94 views

### Snubber Filter Circuit Not Working Triac Dimmer

Hi I am working on a project using a triac to do phase control dimming of 120V ac powered devices. I recently translated my project from perfboard to SMT using an SMT fabrication service. The project ...
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### Clock Phase Shift Not Working on FPGA

I have a project where I am using two clocks at the same frequency, with one having a -90 degree phase shift. The FPGA board I am using is an Nexys A7-100T configured with Vivado in VHDL. I have used ...
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1 vote
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This is a homework question I've been attempting. But the answer I get doesn't match with whats given and I don't understand why my method is wrong. This is the question with answers. Here's what I'...
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### Understanding Output From DFT

I should preface this by saying I'm a novice at all of this: I'm designing a system (using a stand-alone FPGA board combined with an ADC that offloads data to a GPU) that is supposed to look for high ...
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