Questions tagged [braking]
The braking tag has no usage guidance.
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Time Constant Equalizer [closed]
I found a device made decades ago and long forgotten now. It was a simple device that compensated for the non-linearities produced by a moving magnet cartridge for audio. I am not a scientist just an ...
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DC braking on induction motor (as done by VFD)
I know the principle of DC braking on an induction motor; a fixed magnetic field is induced in the stator and it makes the field in the rotor align to it.
However due to the working of the induction ...
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Using Zener diodes to limit the max RPM of wind turbine
A windmill produces AC voltage, with increasing voltage as the turbine spins faster. If you know the max safe RPM, you could find the associated max safe voltage (V_safe). Additionally, when the leads ...
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Shunt regulation - discrete or linear? [closed]
This is a spin-off of the question I've asked before. I've received many interesting answers and summarized them there. I also accepted most interesting suggestion. During this time we also bought and ...
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Any information on magnetic braking with copper?
I have an engineering project where I have to design and build a model of a drop tower from a theme park. The tower itself can be no taller than 40cm.
I plan to use magnetic braking with copper to ...
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How can I handle regenerative braking when the lithium-ion battery is full?
Long version
We are using third party motor driver with regenerative braking and a lithium-ion battery. Apparently, this combination is well known in e-bike enthusiasts world as having a huge problem ...
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How to plug phase and neutral on this differential? [closed]
I have replaced an old differential with this one:
Since there's no indication how/where to plug in line and neutral, can you please help?
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How can I implement a brake in my child's 12v car? [closed]
I recently got my child a 12v ride on car. The car's internal control does not have a brake, but there is a parent remote control which has an emergency brake button. This button seems to hold the ...
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How to model the dc link voltage dynamic of the inverter fed induction machine drive in braking mode?
I have been attempting to find the differential equation describing the dynamic of the dc link voltage of the induction machine based electric drive in braking mode.
I have started with the energy ...
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Can a BLDC motor be actively retarded (braked) by decreasing the electrical drive frequency?
I need to implement very fine (positioning) control of my BLDC motor system, one which has significant inertia. Basically servo control of a weighty object.
Is it possible for a BLDC motor be retarded ...
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BLDC providing boost to rectifier circuit
I have been tasked to work on this project, and I have struggled to find clear resources that nicely explain the full concept and would appreciate some help. Here is all the information.
There is a ...
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Does shorting a BLDC motor's terminals to act as a brake while at 0 RPM cause damage?
I am a tinkerer, you will have to excuse me as I am not well versed as most of the professionals here. I just have what I think is a simple question that I’ve looked everywhere for on the internet but ...
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Magnetic braking - solid metal or coil?
We have probably all seen the demonstration of magnetic braking where a magnet swings by a piece of solid copper and the induced current slows the travel of the magnet.
Presumably a shorted coil of ...
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Using a BLDC for variable counter-torque
I have a project in mind where rather than using weights for resistance in exercise training, I would use a BLDC for resistance. I want to have a pulley system hooked up to a BLDC, similar to the ...
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How is amount of regenerative braking in DC motor controlled
I know that if you spin a DC motor by an external force, it can create electricity, hence it can be used to charge a battery or something. This is used in regenerative braking. But how can be the ...
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Regenerated current during deceleration of PMSM motors
Let's say that a VFD is powering a PMSM and the motor is rotating at rated speed. The motor is connected to a high inertial load, so it cannot decelerate quickly. Now if the VFD commands a quick ...
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Emergency brake BLDC motor [closed]
I am redesigning a flawed safety system for an autonomous robot. The robot will drive alongside humans and roads, thus it needs redundancy. The braking is achieved in two ways:
The motor controller ...
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Braking a brushed DC motor with a flyback diode
I've seen many references to braking a brushed DC motor by shorting its terminals. As I understand it, the motor torque is relative to the current through it, which should dissipate relative to its ...
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PWM controller with synchronous braking
I'm a student and I'm attempting to study how to use two different PWM signals to continuously drive and brake a brushed 12 V motor from an microcontroller.
First frequency will be around 4 kHz (for ...
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BLDC Driver "Input High Voltage" Fault
In the system I designed, there are 2 motor drivers and 2 motors. Motor drivers are powered by 48V. The rated power of my motor is 400W. I drive the motor at 1500 RPM.
When there is a sudden load ...
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How to achieve feedback in regenerative braking?
I’d like to implement regenerative braking in my own brushless ESC I’m designing. I’m stuck however on the part regarding voltage step-up. As I understand it, ESCs during braking usually use the motor ...
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Is it possible dimension a braking resistor according to a specific stopping time for a DC motor?
Assuming that a DC motor is running at 1200 RPM and there is a power cut, the motor will stop in 40 seconds. Now when the power cut occurs, a braking resistor is switched on. What would its value be ...
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How to use braking in this DC motor control system?
I am running a DC motor through a DC controller(DC60DP500-800BL-R01 Keya PWM Electric Vehicle Controller) in a lifter. It's working fine but the only problem is even after stopping the motor the ...
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4 Quadrant DC chopper Operation
can anyone explain 2nd quadrant operation of DC chopper in easy way? may i ask about how brake applied in 2nd quadrant
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Using a motor as a brake
I want to use the motor of an electric vehicle as a brake. It is a 36V ~27A motor.
I looked up 500W+ resistors and they are quite pricey, I figured the cheapest alternative would be 100W resistors in ...
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Bldc motor braking
Which type of braking is most suitable for bldc motor?
Plugging or dynamic or degenerative braking.
For motion control application.
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How to electrically brake a brushless motor
I'm sorry if this question is too stupid, unfortunately I have a very low experience with BLDC motors.
I would like to use 4 x 350W, 24VDC brushless motor hubs for my wheeled robot (they are usually ...
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Braking a small hall sensor BLDC motor on a ballscrew
I want to create a simple circuit (or better, add software change for the existing circuit) for deceleration of a small BLDC motor connected to a ball screw. Exact stopping at zero is not a ...
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Universal Motor as a magnetic brake
Hello friends of stackexchange,
I want to make a magnetic brake based on a universal motor from a Candy wash machine TYPE 20584.528. I suppose that the best way is to use the motor as a DC generator ...
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BLDC/BLAC controller motor voltage reverse protection
I am currently designing a BLDC controller and keep running into a power safety issue:
I have added a smart diode reverse protection controller to my design with its transistor between the fuse and ...
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Braking with less resistance
I have a 500w dc motor that I want to brake with a power resistor. Using ohm's law I can calculate the resistance needed like so
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Is a PWM required for regenerative braking on a DC Motor?
The DC Motor is question is here: DC Motor
I was wondering if you use a diode and a switch in a manner shown in the below picture if the motor would exhibit regenerative braking when SW1 is open? (...
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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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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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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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Braking methods for induction motors
When I search on the web, I see three types of electrical braking exist for induction motors:
Regenerative
Dynamic
Plugging
Regenerative is said to be possible when rotor speed is higher than ...
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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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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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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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Determining the correct power rating of a braking resistor
Braking resistor on AC servo motor driver is not working, and I cannot find power on it, but it is 100 Ohm (It burned up). Power on driver is 200W. Can I put 400W (100 Ohm) braking resistor on that ...
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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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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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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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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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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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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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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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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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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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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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