Linked Questions

46
votes
1answer
55k views

How can I implement regenerative braking of a DC motor?

I know that many electric cars are able to convert the momentum of the car into stored energy in batteries, rather than convert it to useless heat at the brake pads. How does this work? How can I ...
9
votes
6answers
5k views

Why do my P-channel MOSFETs keep dying in this H-bridge?

So this is my H-bridge: Every time I start using it in one direction the P-channel MOSFET and the NPN BJT which belong to the used direction die in seconds. The killed MOSFET and the BJT developing a ...
3
votes
4answers
28k views

How to decrease the motor Speed without losing the maximum Torque

I am using MDS40A motor driver(http://www.cytron.com.my/viewProduct.php?pcode=MDS40A&name=SmartDrive40) to drive a power window motor (12V, brushed motor) similar to the one at (http://www.cytron....
9
votes
1answer
5k views

DC Motor Overvoltage Operation

I am new to PWM control. Is it advisable to operate a motor at higher than rated voltage with the "PWM average voltage" more than the nominal voltage specified in the datasheets? After some ...
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
3k views

Reverse voltage circuit protection using an N-channel MOSFET

I am currently working on a drive for a DC motor and I want to add a reverse voltage protection on my circuit so it doesn't fry in the case of an inverted power supply. I've read many tutorials on ...
5
votes
2answers
2k views

Limiting torque on a DC motor

I'm developing a small knob that can be controlled by both the user and a microcontroller. My current design is a modified servo. I'm removing most of the gearing to keep the motor's torque low. I'm ...
4
votes
2answers
2k views

The flyback diode and its applications

So in an application like this: The coil of the motor will, by Lenz's Law, induce a very large negative voltage across its terminals (without the diode in place). Would this voltage be very negative ...
1
vote
2answers
2k views

DC-DC converter to drive DC motor

In a robotics application I have to install a 12V (30A) DC motor actuator in a vehicle. The typical setup indicated by the manufacturer is to directly connect it to the battery, because of inrush ...
0
votes
4answers
811 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 ...
2
votes
2answers
783 views

Motor Control System for LGB Trains

I am currently experimenting with some motor control circuitry for my garden train. I have spent several time trying to read up on the basics of motor control, and I have also done some prototyping. I ...
0
votes
1answer
256 views

Why is this circuit letting the smoke out?

Using this circuit as a proof of concept to run a 12v motor off a 12v wall wart and ultimately use the 5v from the 7805 to power a Particle Photon through Vin pin. This circuit is letting the smoke ...
0
votes
1answer
221 views

Using a Motor Controller to Limit Voltage to a Motor

I am working on a project where we I have a 24 V battery controlling an electrical system. Attached to that 24 V battery are four 24 V brushless motors. I also have to run two 12 V motors. ...