Questions tagged [commutation]
The commutation tag has no usage guidance.
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0answers
35 views
Commutation techniques in SCR
I read in a textbook that "Commutation Time is more in Current Commutation compared to Voltage Commutation".Kindly Elaborate.
-2
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1answer
65 views
Newbie question: Feasible way of amplifying 100+ channels of slow and low amplitude signal
I want to amplify signal coming in hundreds of channels (sensor array each producing a very low amplitude 30-200Hz signal). For every channel i care only about intensity of the signal (i don't need ...
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0answers
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How to add back emf as part of this sinusoidal commutation equation
I recently found a nice article on sinusoidal commutation which has a simple exposition of the subject. The torque is derived from first principles but the equation seems not to include BEMF.
Does ...
0
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1answer
61 views
BLDC Motor rotor vibrates with audible high pitch beep, but does not spin. Controlled by custom motor controller
The circuit I have built (taken from the HIP4086A gate driver data sheet found at https://www.intersil.com/content/dam/intersil/documents/hip4/hip4086-a.pdf) is:
The only difference between this ...
1
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1answer
115 views
LTspice diode commutation
I have modeled an ideal diode rectifier fed from a 230V/50Hz grid with a slim DC link capacitor and a constant power load (1kW) coupled with a small resistive load. For Cdc=14uF i get a phase input ...
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0answers
48 views
Commutation overlap symmetry
Let's say we have three phase diode (ignore SCR in the picture) rectifier:
With no source inductance, diodes are conducting at following angles:
Diode 1: 30º < X < 150º
Diode 4: 210º < X &...
0
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1answer
47 views
How did rotary converter commutators conduct electricity?
I've been reading about rotary converters and examining photographs, but I've noticed that nearly all have a very strange (to me) commutator design. It looks like a piece of wire screen rather than ...
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1answer
62 views
Quick specific questions about Electric Motors that I can't find on Internet
I want to talk about induction motors and Universal motors.
1) is the rotor of an Universal Motor a Wound rotor?
2) the induction motor with Wound rotor have commutators?
3) Universal Motor can ...
3
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2answers
668 views
Brushless DC motor problems at high velocities
For a project we use a brushless DC (BLDC) motor. Everything works fine until we tried to reach high velocities. I will first explain my setup, and than explain our problems using some graphs. ...
13
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4answers
918 views
H-Bridge Fly-Back
Sorry if this question is a little long, but I though it prudent here to discuss the state-of-the art as I know it before asking the question.
ISSUE
When using an H-bridge to drive a bidirectional ...
