Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [braking]

47 questions
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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 wire will have the same effect. The question is,…
Dirk Bruere
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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 inductive time constant. Shorting the terminals…
Christian
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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 used for ATVs or hover boards). Each motor is…
Marcus Barnet
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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 balance with the assumption that there are no…
Steve
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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 (braked) by reducing the drive frequency below…
Ant Williams
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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? (Assuming that the voltage from the motor when…
Jake Freeman
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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 moving downward OR When its Cabin is empty and it is…
ajeebx
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How can I implement a brake in my child's 12v car?

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 motors from spinning, so the car stops…
Mahesh Sundaram
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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 drive, red) and the second will be ten times the…
Papuan
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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 requirement. Motor is 48V, max 3000rpm, rated 220W. Ball…
Simm
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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 the bulk capacitance (4 x 220uF elcap bank). This…
Alex Er
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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 always VFD stops motor by regenerative braking…
d.alex
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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 raising and lowering a diverter. When raising it…
Isaiah De Freitas
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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 motor?
Davor Krpan
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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 have on hand some p channel MOSFETS, FQP27P06. …
mScientist
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