Questions tagged [power-electronics]
Refers to the conversion of electric power by using solid state components such as semiconductors. Can also generally apply to the field of electrical engineering which works with power electronics.
3,059
questions
0
votes
0
answers
20
views
AC outlet of 78,000 mAh power station stopped working [closed]
The AC outlet of my power station that I use to charge my laptop, phone and other little gadgets stopped working.
I mistakenly connect a handheld hair dryer to it and since then, the AC outlet doesn’t ...
- 1
0
votes
0
answers
13
views
Back-to-back PMSG based wind turbine
We have a PMSG based wind turbine with back-to-back converter. Now, the Permanent magnet provides a rotating magnetic field. So, how does the reactive power exchange happen between converter and grid?
- 166
0
votes
0
answers
18
views
Wind turbine: Back-to-back converter DC link
In the Type 4 topology of wind turbine generator, we use a back-to back ac/dc/ac converter in PMSG based wind turbine. Why do we need a dc link? Why cannot we simply use a cyclo-inverter instead of ...
- 166
0
votes
1
answer
36
views
Single Phase Active PWM Rectifier using MOSFET
I am using this H-Bridge Configuration to make active PWM rectification to control the output average Voltage by controlling the Modulation Index.
Here is the circuit diagram and the pulses of each ...
- 11
1
vote
0
answers
51
views
Adding a Resistor and diode on to my PCB without doing re layout [closed]
I have a question regarding adding components to the PCB which are not laid out in pcb layout. I want to add a diode and a resistor in parallel with gate resistor of a MOSFET in order to mitigate the ...
- 305
0
votes
1
answer
74
views
Grounding in power electronics
I'm designing a three-phase inverter and have been looking up information online with respect to grounding, which led me to a somewhat misapprehension.
In my system I firstly planned on separating the ...
2
votes
5
answers
182
views
Best way to go from 5V to .95V to power an FPGA at max 15A
I need to power the core voltage on an FPGA from a 5 volt supply with a lot of constraints.
This is a rad hard environment so many components are ruled out. I'm only able to find a SMPS that will go ...
- 21
1
vote
5
answers
189
views
How does this PNP transistor and P-channel MOSFET circuit work?
How does this PNP and P-channel MOSFET circuit work? How does the current flow? What are the voltage potentials at the nodes A, B, C and D?
- 19
0
votes
0
answers
97
views
I keep blowing my resistor R3 on this part of the circuit [closed]
My 180 ohm series resistor R3 keeps blowing as soon as the circuit is switched on. I have tried to use a higher power rated resistor or two parallel resistors, but no change. Can anyone please explain ...
- 17
0
votes
0
answers
58
views
How is clearance and creepage considered in this case? [duplicate]
I'm making a high voltage PCB where there are 2 grounds - one is HV ground (HV-) and the other is the microcontroller ground which is isolated. HV+ is at 100VDC. How do I consider the clearances and ...
- 47
-1
votes
0
answers
48
views
Clearance and Creepage for the Nets
I have made the schematic of the double pulse test setup and have also highlighted the NETS for the PCB layout. Test will be done at 100VDC (HV+) and current ~ 30A.
Please suggest where the clearance ...
- 47
3
votes
1
answer
432
views
Electronically activated circuit breaker
I want to be able to disconnect the load from a circuit, which may be of variable amperage, possibly up in the hundreds.
I guess what a normal person would do is probably use a contactor of some sort. ...
- 928
1
vote
2
answers
102
views
If the current through a welder is hundreds of amps to melt metal, how does the welder circuitry cope
A pretty simple question but i have no idea. My logic is if the current is so high where something as low resistance like a metal slab can be heated to melt. How on earth does the components in the ...
- 305
0
votes
0
answers
91
views
How to decide the number of layers? [duplicate]
I am new to PCB design and I want to understand how exactly we should select the number of layers. I just know more layers helps us with making the routing easy but I don't understand what is power ...
- 47
-1
votes
0
answers
51
views
Circuit help power electronics (HEIDBC topology)
I am currently designing a power electronic circuit which operates in step-down mode and it has single input, multiple outputs. The input is 200 V DC and the outputs are 15 V (R1) and around 25-29 V (...
- 1
1
vote
3
answers
133
views
How to decide number of layers?
I am new to PCB design and I want to understand to understand how many layers to choose. I just know more layers helps to make the routing easy but I don't understand what is power plane, ground plane ...
- 47
0
votes
1
answer
56
views
Boost converter output instability
I'm currently working on a DC-DC boost converter project and encountering this issue where the output initially peaks but falls back to the input voltage. My desired output is around 140 V.
I'm using ...
0
votes
3
answers
69
views
How to wire two DPDT relays in parallel?
I need two DPDT relays in parallel. They both should switch at the same time. I would connect 2 with 2 and 7 with 7. Is this correct?
- 19
0
votes
0
answers
48
views
How do I calculate time from pulse width?
I am looking into the LL4148 datasheet and notices the IFSM is rated for 1A @ pulse width = 1s and 2A @ pulse width = 1us. The goal is to calculate the energy pulse using E = IVt.
The current and ...
- 53
0
votes
0
answers
34
views
Double Pulse Test setup layout consideration
I am new into PCB Design and wanted some suggestions for the layout for double pulse test.
Regarding placements of the components (inductors, capacitors, gate driver, MOSFETs)
How many layers? 2? ...
- 47
0
votes
1
answer
52
views
What is the difference between voltage mode control and current mode control for SMPS? [closed]
What is the difference between voltage mode control and current mode control for SMPS? I also wanted to know what kind of modelling techniques are used model these controls (i.e. average models... etc....
3
votes
2
answers
433
views
Which is the more important switching parameter in MOSFET datasheet? Turn on/off/delay times or Input/Output/Reverse capacitances?
I see both capacitance and timing details mentioned in the MOSFET datasheets.(Ref:)
Which one should be considered for comparing the MOSFET switching performance between 2 MOSFET part numbers?
Note: ...
- 2,769
-1
votes
0
answers
36
views
12 VDC to 24 VDC conversion for PLC input high signal [duplicate]
I have Siemens S7-1200 PLC DC/DC/RLY. It takes 24 VDC inputs. One of my inputs to PLC is 12 VDC. I want an intermediate circuit that converts the 12 VDC to 24 VDC. Moreover, I have a 24 VDC source ...
0
votes
1
answer
70
views
Checking PCB Layout, Routing Tips and Improvements?
I've made some significant revisions to my old PCB design and wanted some advice on routing! This time I've tried to properly space the large current/voltage traces, kept traces short where possible, ...
- 21
0
votes
2
answers
55
views
Can we sell 110V equipment without NRTL certification in a US market?
Only in some places.
Weight scale product
certification
NRTL
110VAC
1
vote
0
answers
65
views
High power dc/dc converter (or voltage clamping) with high source impedance
Short version:
I have a DC voltage source (adjustable up to 750 V 60 A) that is powering our robot which expects 320 V nominal (never exceed at 360 V) and can consume up to 30-35 A (but only 30 mA ...
- 6,240
0
votes
0
answers
51
views
H-bridge output voltage ripple
I have built this H-bridge. I have a problem with the output ripple. I have used an RC snubber circuit (10,30,50 and 60nf with 5 ohm,) but still have the same problem. I checked the gate signal. It is ...
0
votes
0
answers
15
views
Choosing the right current sensor for the PMSM motor drive application
I have a 400W PMSM motor. It has a rated current of 2.4A with 3000RPM and 108V. The motor datasheet says that it can go upto 4500 RPM with load current of 4A. The motor is HG-KR43. Now I want to read ...
1
vote
2
answers
118
views
Can I convert 12 V DC to 24 V DC using a 2N2222A? [closed]
I have a circuit which generates a 12 V DC high pulse when a laser is detected. I want to convert this high pulse to 24 V DC to feed into a PLC input (Siemens S7-1200.) Can I do this using a 2N2222A?
0
votes
1
answer
63
views
If the chassis is at high potential and a human touches it, will he get shocked? The proposed circuit is for the cancellation of CM current
This circuit is compensating the potential difference between the chassis and motor so the bearing current or leakage current cannot flow from motor to chassis to ground.
If the chassis is at a high ...
1
vote
2
answers
196
views
PCB layout, any improvements to make on the routing?
I have designed the PCB below and would like some advice on good practice for my PCB routing / board schematic. Are there any design considerations that I should be paying attention to for the design?
...
- 21
0
votes
0
answers
80
views
Confusion in number of turns and strands in flyback transformer
I am designing my own discontinuous mode flyback transformer and am following the book Transfomers and Inductors Design Handbook by Colonel. Wm. T. Mclyman. I have used all the equations of the ...
- 1
1
vote
1
answer
46
views
3 phase 4 wire inverter output common mode choke selection
I designe and develope a stand alone 3 phase four wire inverter that it works with unbalanced output currents. The standard 3 phase 3 wire inverter output are used common mode choke like this (RB6132-...
- 13
2
votes
0
answers
88
views
How to generate 0-150V adjustable DC output? [closed]
I wish to generate a voltage range of 0 - 150V output @ 2A Max to drive an actuator, and I don't really have a lot of great ideas at this point.
I have 2 power sources available, one is 220V AC, ...
- 21
-3
votes
1
answer
113
views
Can anyone help me write a program in Python to output 5V from a USB port to control a relay? [closed]
Can anyone help me write a program in Python to output 5 V from a USB port for only 2 min and then off for feeding a relay using only the power wires of the USB cable and without using an Arduino?
0
votes
0
answers
17
views
ZMPT101B module producing VDC even with AC source disconnected
I am trying to use ZMPT101B to measure 110V AC but even after calibration and using multiple sketches when I power off my AC source it measures some AC voltage (or in other words a signal is still ...
- 123
0
votes
1
answer
86
views
In aircraft power supply, why is the neutral not connected to chassis GND unlike household utility power?
Usually the chassis of any household equipment is connected to earth ground for safety.
Part of the culprit is neutral being connected to Earth ground. (Reasons are mentioned in this post.)
My ...
- 2,769
1
vote
1
answer
93
views
EMI filter attenuation requirement for a buck converter given EMI compliant AC-DC converter
In my application I have an off the shelf 600W 72V AC-DC converter that generates the main DC bus that powers a custom board that houses a 72V input, 9A output buck converter switching at 330kHz. A ...
- 23
0
votes
1
answer
42
views
Control manipulator mechanical arm by infrared
I want to make an infrared control circuit (remote) connected to the Manipulator Mechanical Arm. I found this circuit, but the outlet is 230 volts, and I do not think that the arm will handle this ...
4
votes
5
answers
2k
views
Do we really need the metallic chassis to be grounded if it is coated with a non-conductive paint?
As per my understanding, a metallic chassis can result in a shock only if two failures happen simultaneously:
Live wire ('hot') insulation wears off and gets in contact with chassis.
Chassis outer ...
- 2,769
0
votes
0
answers
18
views
Inductor based or switched capacitor DC-DC converter for given load parameters for mouse's headstage
For my master's thesis project, which focuses on designing a control loop for a DC-DC converter in the receiver of a resonant inductive coupling system to handle significant and unpredictable ...
- 95
2
votes
3
answers
964
views
Why do amplifiers have minimum frequencies?
RF amplifiers, both power amplifiers and low noise amplifiers, are rated with a minimum and maximum frequency. For example, the Analog Devices HMC517LC4 Low Noise Amplifier has a frequency range of ...
- 619
-1
votes
1
answer
65
views
What connector pin header can I use for high voltage?
I am making a PCB for a double pulse test setup. What connector pin can I use on my PCB to connect a high voltage DC supply for the HV+ and HV- connections?
Voltage ratings: 100VDC and 800VDC.
The ...
- 47
0
votes
1
answer
69
views
Kicad telling me to connect pads together when I feel it's incorrect
Hey all I am wondering if this is the correct way to trace a fuse holder on my pcb. I would imagine that the top 2 pads connected to each other and the bottom 2 pads connected to each other. Running a ...
- 731
1
vote
2
answers
127
views
Generating a biphasic pulse
I was trying to generate a biphasic pulse for TMS application. I was referring to this website.
The waveform is given below.My circuit implementation is described as follows.
I am making a flyback ...
- 1,781
0
votes
1
answer
92
views
H-bridge inverter with phase shift control
I am trying to apply phase shift control to my H bridge inverter but I get these spikes in the picture I don't know why. And it getting worse if I apply inductive load
1
vote
2
answers
115
views
How does this zero crossing detector circuit work? How can I modify it to work at lower supply voltage?
I've been working on a zero crossing detector circuit for audio modulating a flyback transformer.
So far it's working great, but I have a few questions regarding the circuit and its operation.
Image ...
- 71
0
votes
1
answer
66
views
Voltage Regulator Overall Efficiency
I am working on the ISL91302BIIZ-TR5931 programmable voltage regulator. It is configured as a two phase output as shown in the figure below:
From the datasheet: I found that the efficiency would be ...
- 25
4
votes
2
answers
113
views
Isolation Topology in SMPS
I have been researching SMPS designs as a hobby recently and finally have the courage to build one for theoretical and practical understanding. I have chosen an isolated design looking at several ...
0
votes
1
answer
94
views
Continuous and discontinuous mode flyback Confusion
I was looking at the construction of the flyback transformers and found its two types the continuous and discontinuous mode. I have slight confusion regarding that:
Is the circuit designing of the ...
- 1