Linked Questions

0
votes
1answer
933 views

Regenerative braking with electric bicycle hub motor [duplicate]

What kind of circuit would be required to implement a regenerative braking system on a electrical assisted bicycle with a motor like this? The motor is brushless and the kit comes with a big ESC box. ...
-1
votes
1answer
2k views

How to suddenly stop DC gear motor, after certain revolutions? [duplicate]

If a DC motor is moving at 100-200 RPM and if I wanna stop it suddenly. IS there any way to stop it quickly ? I'm using H-bridge to provide current to the motor? I tried to reverse it for a while ...
24
votes
3answers
124k views

How to improve torque and RPM of a DC motor?

I have an FA-130 motor (DC) with permanent magnet, my power source is a 2 AA batteries (rechargeable) so a total of 2.4v. Assume that all cases will start from the same specification, theoretically, ...
23
votes
3answers
9k views

Why should I worry about a motor causing my supply voltage to shoot up when the back-EMF can't exceed the supply voltage?

I have heard people say that in motor control circuits, one must take precautions to keep the motor from feeding back into the power supply, causing the supply voltage to rise, consequently breaking ...
25
votes
1answer
25k views

How can I measure back-EMF to infer the speed of a DC motor?

I'm interested in measuring the back-EMF of a motor to determine a motor's speed because it's cheap and requires no additional mechanical parts. How can I measure the back-EMF when I'm driving the ...
12
votes
4answers
3k views

Is it valid to consider back-EMF in a DC motor equivalent to increased inductance?

I know that back-EMF can be considered as a voltage source in series with the motor which is proportional to speed. This is the common understanding, and I totally get it. Before I understood this, I ...
5
votes
3answers
3k views

Is it possible to store flyback voltage in capacitors?

I recently put together a circuit that I use to control an electrical motor. I use an Arduino's PWM through darlington-pair transistors to control the speed of the motor. During construction of this ...
7
votes
2answers
7k views

Result of constant current through DC motor under different loads

I've done some research on brushless DC motor and have a few questions what would happen when a constant current is sent to a DC motor. From my understanding, the current is directly related to the ...
1
vote
2answers
2k views

Braking by short circuiting possible? [closed]

If I short the three terminals of a bldc motor after switching off the supply to the motor, will that give me braking? And if it can how can I implement this? I'm working on a project called ...
2
votes
2answers
2k views

Can you use reverse as regenerative braking in a 2 quadrant motor?

I'm having trouble understanding 4 quadrant versus 2 quadrant drive for a 3 phase permanent magnet brush-less motor. Let's say you are riding a scooter with such a motor at a certain velocity forward ...
0
votes
4answers
653 views

small wind turbine pancake generator, force of magnets effect on rotation when charging a battery?

Contexte: a DIY small wind turbine pancake generator, made with 2 rotor plates of 12 rectangular magnets, and one stator of 9 coil wired. After the generator, the 3 alternative electricity phases are ...
1
vote
1answer
2k views

48V PWM Motor Controller

I considering doing an electric Go-Kart project with two direct drive rear 48v motors (considering two of these). I plan to control it using Arduino PWM pins. However, I am not sure of the route to go ...
1
vote
3answers
635 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 ...
5
votes
2answers
556 views

making a dc motor sing under load

I have a battery operated toothbrush that I want to generate notes with using PWM on the motor. The microcontroller used is an Arduino for testing and am able to get a bare motor to generate tones. I ...
2
votes
1answer
474 views

Beaglebone Black - DC Motor causes ADC to hang?

I'm working on a regenerative-braking project with a DC motor. My Beaglebone Black drives a small DC Motor using a TB6612FNG motor driver from Sparkfun (datasheet): Everything runs fine except that ...

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