Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [kickback]

The tag has no usage guidance.

2
votes
1answer
63 views

Is Inductive Kickback Protection not necessary for AC?

For DC inductive loads, typically a flyback diode is placed over the motor so that when the current changes instantaneously it doesn't have a chance to build upon the switch contact and then create a ...
1
vote
1answer
60 views

Questions about Inductive Kickback and what causes an inductor to discharge?

This is most likely a dumb question, just for some reason I have just forgotten the fundamentals about how charging and discharging work. Essentially my question is for this simple circuit: When the ...
1
vote
1answer
84 views

DC motor causing project to work unexpectedly

We have developed in protoboard the following schematic for driving a DC motor with transistor for Arduino, but instead of using the PN2222 transistor, we are using a MOSFET IRF540, and instead of ...
11
votes
4answers
2k views

What keeps the kickback voltage from reaching an infinite voltage?

We know that the voltage over an inductor is defined by the formula: \$V = L * \frac {di}{dt} \$ So in the case where the current flow is suddenly interrupted (like when a mechanical contact is ...
1
vote
2answers
127 views

Why am I seeing more inductive spikes from my motor at a higher duty cycle?

What is the mechanism that causes more inductive spikes with a higher duty cycle, even if the frequency of the pwm is held constant? Doesn't the motor create voltage kickback only when it is turned ...
1
vote
3answers
1k views

Selecting Flyback Diode for Inductive Load

I intend to run a 48V DC water pump which uses this motor (http://www.leeson.com/leeson/searchproduct.do?invoke=viewProductDetails&motorNo=098382.00&productType=0) through a solid-state relay ...
6
votes
1answer
425 views

Snubber Capacitor Voltage Rating in the Real World

What are voltage ratings for the capacitors inside the common off the shelf ac snubber networks, such as 0.1uF + 100 Ohm ? It would seem that larger inductive loads can easily drive the capacitor ...
0
votes
2answers
220 views

Inductive kickback when applying PWM to the output of an alternator

simulate this circuit – Schematic created using CircuitLab I've got a fairly odd LED setup whereby a vehicle's alternator is being used to generate the power (rectified to DC) required to run ...
1
vote
2answers
477 views

how to calculate kickback voltage for the inductor in a RLC circuit?

I am designing an RLC circuit and can anybody suggest the method to calculate theoretically the kickback voltage produced by the inductor to choose the flyback diode. I have tried simulating the ...
6
votes
2answers
483 views

Switching inductive loads at long distances - best practice

This question focuses on the switching of inductive loads at a relatively long distance, specifically on handling the inductive kickback as a result of switching. The inductive load in question is an ...
1
vote
2answers
151 views

Observing kickback voltage in LC circuit

I'm driving an LC load using ULN2003AN IC. The input pulses are 5V at 25 KHz with 50% duty cycle. I connected an oscilloscope (VM1) to the coil. I was hoping to see some kickback a voltage levels, ...
0
votes
2answers
210 views

What current rating does my kickback diode need to have?

This seems like it should have been asked before, but I can't find anything. I've got a large 12v DC motor (11A startup surge, 7a running current) that I'm PWM-ing at ~20khz through a mosfet. I, ...
4
votes
1answer
2k views

Clamping Inductive Kickback in AC Circuits

I want to eliminate/clamp the inductive kickback that would result from turning off a large inductor, such as a relay or a transformer. In a DC circuit, I would use a diode to flywheel the current. ...
4
votes
1answer
1k views

Inductive “kick” and possible dangerous experiment

So I have this unmarked, unknown transformer (probably from a microwave oven so it is pretty beefy) and I thought that a safe way to determine the primary from the secondary windings would be to put 1 ...
2
votes
1answer
460 views

Will an opening fuse cause an inductive kick, or not?

I'm looking at designing a high-current crowbar circuit. We need to blow a 1400A fuse on demand. One question that has arisen is, what about inductive kick? If you short a large capacitor through a ...
13
votes
3answers
14k views

Where should I put the kickback diode in a transistor switch?

When driving inductive loads with transistors, we use kickback diodes. What I understand is a kickback diode supplies a path for the inductive charge to discharge. Also, an inductor will try to ...
7
votes
2answers
8k views

Inductive kick-back voltage calculation

I am controlling a stepper motor (M42SP-5P) with BUZ11 MOSFETs. The winding resistances are \$22\Omega\$ and each winding is 18 mH as I measured. I am driving it with 24V, so let's say the drive ...