Questions tagged [braking]

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Braking Methods of Induction Motor in VFD

As you know, we can stop an induction motor by plugging or regenerative braking. What I'd like to know is that when controlling induction motor with VFD, which braking way VFD uses? It seems to me ...
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1answer
76 views

How does DC braking stop an AC motor without considering current direction?

When a motor is coasting to standstill, if I apply a DC voltage across the windings I will brake that motor... We'll at least that's what I've read. Now here's the thing. With reverse current ...
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0answers
41 views

Simple braking chopper using Zener/TVS diode

So I'm designing a motor controller, relatively low power (100-150W, 12-48V supply), and I'm thinking about adding a braking chopper. Not strictly needed in this design, but it would be a nice value-...
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1answer
59 views

Braking Methods in Induction Motor

When I search on web, I see three types of electrical braking exist for induction motors. 1-Regenerative 2-Dynamic 3-Plugging Regenerative is said to be possible when rotor speed is higher than ...
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2answers
58 views

My hybrid motor starter keeps tripping

I have this exact motor starter on my AC braking motor (FLA 3.5A). The starting current is 12.1 A however and keeps tripping the relay after approximately ten minutes of use. The motor operates by ...
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2answers
108 views

Brake Resistor in Regenerative Case for Elevator

I am trying to understand the switching pattern of Inverter and the Brake chopper while a 3-phase AC motor is in regenerative mode for example in Elevator case: When its Cabin is full and it is ...
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3answers
98 views

bldc regenerative braking, braking torque

I'm trying to figure out the braking torque calculation for a BLDC simulation. Now if I'm looking at a datasheet I know the torque at a given rpm at acceleration. If I brake with regenerative breaking ...
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0answers
42 views

Regenerative energy Dissipator for BLDC motor

I want to design a circuit to dissipate the reverse energy from BLDC motor, can I use PWM control technique in voltage sense circuit in order to switch on the power circuit? In detail : In my ...
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2answers
200 views

About braking resistor

Braking resistor on AC servo motor driver is not working, and I cannot find power on it, but it is 100ohm (It burned up). Power on driver is 200W. Can I put 400w (100ohm) braking resistor on that ...
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1answer
56 views

Motor Braking Issue

I have the following schematic using the motor below. (I did not create the schematic) The only information I have on the motor is what is on the information plate. The current schematic works, ...
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0answers
62 views

Half Bridge motor braking

I have a motor that only runs in one direction. I currently use a fqp30n06L logic level MOSFET to control the motor. Once the MOSFET gate is grounded, the motor does stop but it freewheels. I also ...
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4answers
107 views

Is it possible to switch an electrical machine several times from motor to generator and vice-versa, within one revolution of its rotor?

I would like to find out how quickly and frequently a reversible electrical machine (EM) can be made to switch functions from a motor to generator and vice-versa - and what are the parameters of the ...
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2answers
272 views

Slip ring (wound rotor) 3 phase motor, what VFD should I use? [closed]

I'm trying to solve some puzzles around the electronics of an amusement ride. It's basicly an old carousel with a wave-like pattern (3 tops/downs along the circle) that i'm restoring. (So that you ...
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1answer
567 views

How to calculate size of dynamic braking resistor

I'm running an RC car which has two zytd520 12V 150rpm dc motors run through an L298N motor controller. I'm going to use reverse current braking to save on weight and complexity of mechanical parts. I'...
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6answers
2k views

Regenerative braking on an electric bicycle

I'm currently trying to build myself an electric bicycle with a regenerative braking system. I am however stuck on the regenerative breaking part. The bike will include a simple DC motor, powered by ...
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0answers
600 views

How can i brake/stop a stepper motor vertically

I have a stepper motor mounted vertically on a rail (rack). That can rise and fall vertically and stop on certain position in height on this rail. My problem is that when my stepper motor stops, it ...
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1answer
1k views

How to implement a motor brake

I have a chinese dc motor controller (YK31C, 350W) which has a connector for the brake. This connector will only interrupt the PWM Signal from the controller and does not short the motor for braking. ...
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2answers
135 views

Regenerative magnetic braking system [closed]

I have to work on a magnetic regenerative braking system, I already designed the magnetic brake and it works, now I need to regen the braking force (Lorentz force). What kind of motor and circuit ...
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3answers
457 views

Why does shorting/putting heavy load on a motor slow it/stop it?

I am doing a simple circuit which includes using a motor in theory (I am using a stepper-motor) as a break. One of the random fun-facts that I have known for a long time is how shorting a stepper ...
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1answer
79 views

Electrical Braking: Why does voltage decrease with a decreased rheostatic load?

So I've been messing around with DC motors and electrical braking. BY placing a variable resistor across the motor terminals of the motor I've been able to vary the braking effect and observe the ...
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3answers
3k views

Braking a small, high-speed DC motor

I am currently having an issue with precision control of small brushed DC gearmotors (130 size) being used as drive motors on an autonomous robot, but this question can be applied to small, high-speed ...
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1answer
166 views

eddy current brakes

I am trying to make an eddy brake prototype It works perfectly using a permanent magnet, but I have to make it using an electromagnet which is not working. I am using a solenoid purchased from Amazon ...
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3answers
3k views

Effect of 0 Hz setting on VFD with continuously spinning fan

As part of a HVAC system we have a supply fan and extract fan running on independent VFD1. With the current configuration we usually don't need to run the return fan as the supply fan pressurises the ...