Questions tagged [synchronous]
The synchronous tag has no usage guidance.
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"Synchronous Buck Converter " [closed]
I want to implement Synchronous buck converter (open loop). For that I need a gate driver IC capable of handling 200kHz switching frequency. Is there any readymade IC available for that or should I ...
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How does the second flip-flop in a naive synchronizer "prevent a metastable state from propagating"?
In this very nice answer it's explained that, fundamentally, a two flip-flop synchronizer's basic operation is to prevent the propagation of a metastable state (effectively, an invalid logic level) ...
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Trying to design a synchronous sequential counter circuit with a given sequence
I'm trying to design a counter circuit that counts 6 → 4 → 2 → 0 →
2 → 5 → 3 → 1 using T flip flops and I haven't been able to achieve it. I tried the steps below and designed the circuit below in ...
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6 to 0 count down timer
I'm making a 60 second timer. I already made the 1st digit in my previous question. I want it to start at 6 not 0, basically 6,5,4,3,2,1,0. I made the flipflop state table and followed the similar ...
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Making a 9-0 synchronous down counter using flip-flops
I've been trying to make a timer that starts from 0 then counts down at 9 to 0. I've been struggling to make it. I made state tables and diagrams and for the flipflops, but when implementing to a ...
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Rotor types in Synchronous Reluctance Motor
I am doing research on Syncrhonous Reluctance Motor (SynRM) and the rotor used in it. I am a bit confused in their rotor types. Now according to Google, the rotor types do consists Salient Poles Rotor ...
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Synchronous buck converter using gate driver IC
I designed synch. buck converter by using gate driver, MOSFETs, inductor and capacitors. I am currently testing in open-loop configuration and later I will test in closed-loop with microcontroller as ...
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How accurate is an open-loop synchronous buck converter using gate driver IC?
I've designed a synchronous buck converter using a gate driver IC and two MOSFETs. I have 10 mH and 6.6 uF capacitor at the output as described in the attachment. I am providing 15 V as an input to ...
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Is the per-unit internal voltage equal to the ratio of field current to no-load field current?
An example problem provides the following information to solve for the field current.
The problem is below.
A large 60 Hz synchronous generator can be considered to be round rotor, that is, xd = xq = ...
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Synchronous Sampling of ADC over SPI on STM32 (STM32G474)
I have a design incorporating an ADC with an SPI interface that requires:
SPI Transfers of 32-bits to read the conversion results from the
previous conversion.
To be able to sample the ADC at 1 MSps ...
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Non-synchronous buck ASIC's diode selection makes sense?
While selecting buck converter ASIC for a design I came across various synchronous and non-synchronous buck converter from different manufacturers. Synchronous buck are OK - no problem with SW node ...
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Can a buck converter functioning in CCM have non-linear behaviour at light load currents?
I've been designing a Simulink/Simscape model of a TI buck converter launchpad (https://www.ti.com/tool/BOOSTXL-BUCKCONV) and I'm trying to have my model fit the behavior of the device.
The board can ...
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How can we find Rotor position of 5AMA400 motor?
I am a technical teacher at high school. All of the components we produce are handmade. We've igbt inverter for a three phase our Wound-rotor synchronous motor control project (Renault Fluence ZE ...
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Asymmetrical Half-Bridge Flyback Converters Simulation issue
I am using SIMPLIS to construct an Asymmetrical Half-Bridge Flyback Converter. Additionally, I am attempting to implement Synchronous Rectification on the secondary side. Please refer to the schematic ...
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Multiphase buck converter current waveforms
I am a student of electrical and computer engineering and am currently working on a project that involves the study of a multiphase buck converter or synchronous buck converter. In simulating the ...
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LLC SMPS Problem
I faced with a problem in a LLC SMPS which I designed,
The mentioned PS is a 200 W/6.3 VDC, Input is 85-240 VAC (including PFC),
For the output rectifying, I used 4 MOSFETs (IRL8113) as active ...
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Are electrical clocks influenced by vibration?
There are many different electrical clocks for generating pulses with constant frequency (e.g. RC oscillators, crystals, OCXOs, MEMS oscillators, chip-scale atomic clocks).
If they are mounted on a ...
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How synchronous can a number of electrical clocks in separate devices remain? [closed]
Imagine we have 5 circuits/devices and in each we have an electrical clock that generates a pulse (for example with a constant frequency of 100 Hz or 1 kHz).
In the beginning we have wired all the ...
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What are overhang conductors?
I am asking this in the context of synchronous generators.
From the textbook "The Performance and Design of Alternating Current Machines", page 421, under the heading "3.Synchronous ...
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How do I delay 2 counters that are using the same clock signal?
So we have this mod-16 counter with certain inputs and outputs:
We are with 2 sets of this counter supposed to realize a Mod-10 counter and Mod-2 counter. I think I know how to do that. The RCO (...
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Designing a Mod-6 synchronous counter with specific behaviors?
So a Mod-6 synchronous counter can be designed by using 3 D-flip-flops connecting the output of the previous one to the next and having the complement of the last one as the first ones input. However, ...
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Do computer/datacenter power supplies utilize regeneration (like in motor control)?
In a PC power supply I have, it implements a synchronous buck converter that uses two active switches without a diode. I found a picture of the schematic online, whose link is below:
https://e2e.ti....
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Synchronous buck - "Inverse" current in the lower switch
I am referring to the typical synchronous buck architecture:
simulate this circuit – Schematic created using CircuitLab
The cycle starts with M1 conducting and inductor current increasing (I_L &...
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Synchronous rectification problems
I am currently designing a LLC resonant converter and am trying to perform synchronous rectification but am running into some issues with it.
This is my design and note I am currently using the ...
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Synchronous generator
While calculating this professor first said 200MVA and 25KVA are 1pu because they are rated values. Then he easily find the E filed by Efiled = Vterminal + Armature Current*total impedance(synchronous ...
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How to design, build and test synchronous sequential circuits using T-Flip Flops?
I want to Use T flip-flops to design the circuit specified by the state diagram of following figure. Zi represents the output of the circuit. This is my school project.
I did everything. But I cannot ...
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How to get a static generator starting from a synchronous one?
I want to model a static generator (a photovoltaic one) inside a simulation tool. This simulation tool has no static generator (it is quite new and not user friendly).
My idea was to model a ...
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synchronous buck simulation
I got confusing result from hspice simulation but I can't get it.
the voltage at "N1"should be 4V when W1 on,and be 0 when W0 on.
but result is always 0 and pulse of negative voltage.
below ...
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Intel FPGA: Source-synchronous input using PHY Lite
I have been trying for several months to get hold of information about how to use an Intel PHY Lite IP (for Arria 10 or Cyclone 10 GX) to implement a source-synchronous input interface:
Last December,...
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Is the generator inside thermal power plants a synchronous type or asynchronous one? [closed]
Are thermal power plants connected to the electric power grid based on synchronous generation or asynchronous one? If a mix, which is the main one?
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How are "async/sync" and "serial/parallel" communications related?
I think "async/sync" and "serial/parallel" are orthogonal concepts. There can be 4 combinations of communication types:
async serial
sync serial
async parallel
sync parallel
From ...
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Calculate the active and reactive power of the connected load after field increase in synchronous generator
A 3-phase synchronous generator connected in Y configuration has the following given parameters
\$V_L=38kV, R_a=0.3\Omega,X_s=2\Omega, S=360MVA, cos{\phi}=0.83\$
Where the parameters correspond to ...
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What happens to the permanent magnet flux of this synchronous motor?
Considering a synchronous motor with permanent magnets (1 pair)
If there is a synchronous motor with permanent magnets and I was given the initial permanent magnet flux
Y_mp = e0(at 15 rps) / w (at 15 ...
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Internal EMF of a Synchronous Generator Relationship with Load side line Voltage
Say you have a 6-pole, star-connected, 60 Hz, 25 MVA rated, 600 V synchronous generator. After conducting open and short circuit tests you get the equivalent circuit with Xs = 600/(root(3)*14000) (...
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Standard equation for delivered power from synchronous generator wrong for fractional kW machines?
When synchronous machines get to a certain size (in the \$MW\hspace{-0.8mm}s\$) the armature resistance is a lot smaller than the synchronous reactance, \$R_A << X_s\$, because of this \$R_A\$ ...
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What value of capacitor should I use with this MP2307 buck regulator?
I am designing a buck regulator using the MP2307 synchronous step-down converter chip, but I've encountered a problem.
The datasheet offers this example schematic, for a 3.3V output:
I understand ...
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Can I margin a synchronous Buck regulator to output all the way from 0V to VIN?
When using a synchronous buck regulator without bootstrap supply for its top MOSFET, it should be possible to margin the output voltage all the way from 0V to VIN by feeding an additional CTRL voltage ...
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Standart Retiming circuit with two D type Flip Flops
I am trying to build a button(for adjusting the clock) syncroniser circuit for a seven segment clock. The button signals are of course async inputs so there needs to be retiming to make sure it goes ...
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Is it viable to short pitch different windings by different degrees of short pitching in the same synchronous generator?
In the design of a synchronous generator one can chose to eliminate or reduce harmonics at the expense of emf.
The pitch factor \$K_p = \cos(\alpha/2)\$, which is always less than or equal to 1, ...
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Synchronous generator governor
The way I understand the governor of a synchronous generator is as follows:
As loads change on the system, the frequency will change. The governor's purpose is to maintain an approximately constant ...
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Effects of decreasing the field voltage of a synchronous machine
I am running a simulation of a synchronous machine in matlab and I have some behaviour I cant quite grasp my head around. The machine is running as a motor with only about 20% of its maximum load, ...
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Why does the armature voltage of a synchronous machine (generator) decreases with a increase of active power
I am running a simulated synchronous machine in matlab and strugling to understand its behaviour. The machine is running as a generator, keeping everything else at nominal value if I increase the load ...
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Synchronous generator to improve the power factor
I read that a synchronous generator can be used to improve the power factor by operating it in an underexcited condition.
If not enough excitation is used, the generator will actually draw reactive ...
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Number of poles used for calculating synchronous speed
I am a bit confused in the formula used to determine the synchronous speed \$N_S\$. Following is the formula used to determine the speed:
\$N_S = \frac{120f}{p}\$
Now for a 6 pole motor there are some ...
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Design help clocked synchronous state machine
This is the problem that I must solve with my own numbers 00000010 in my case.
Here is where I am at
Input Code
Based on my design, my z state should never go high unless my y state gives 2 lows ...
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Need help identifying weird serial protocol
I am trying to decode an embedded serial protocol. The device is a wired remote control for a crane. The controls are obsolete. I'm trying to design a new replacement one.
There are a few buttons and ...
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Output phase voltage of wye-connected synchronous generator
The question:
The answer:
However, theta is the angle difference between the terminal phase voltage and the line current as shown in Figure 20 below
So, I think the answer would be
512/12 - 47/-34....
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Difference between unbalance load connected to grid vs isolated generator
Given two cases as following-
CASE 1
An isolated 3-phase synchronous generator in star connected to a star-star 3-phase transformer and then secondary of transformer is connected to a highly unbalance ...
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Synchronous DC-DC buck converter I saw online
I constructed this synchronous buck converter circuit I found online and I wanted to know how reliable it actually is: ( I used a battery source for the VCC+ pin on the op-amp because the 12 V line ...
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Electrical phase in a power grid and power transmission
I'm very new to the study of power grids and I'm having some trouble understanding some very basic concepts.
I have been looking at the problem of synchronisation on power grids and I'm not quite sure ...
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