Dc motor Definition and 314 Threads

So I've designed this simple circuit for an electric vehicle. The inductor and resistor that are boxed off are the motor. The way it works, as you can probably figure out from the diagram, is that the RC circuit on the left controls how long the right side of the circuit runs (via the...

Hi, What is the effect of "back e.m.f." on the torque output of a permanent magnet d.c. motor? I googled it but didn't get any results.. I just need a brief description to understand the concept.. Thanks :blushing:

Hi guys, I'm developing a BLDC motor controller with load. I've bought a Maxon E40 motor . But some things i can't figure out: I want to control position, speed and current (torque). I use PID controller to do it. In the closed loop system the output of the speed controller should be input...

Hi everyone. I'm in the process of designing a telescope mount, and am now trying to figure out how to drive the thing. Ideally I would like to go with an off the shelf dc motor and gearhead setup, as this appears to be the cheapest option. My problem is, that I don't know how slowly you...

The diagram shows a DC electric motor containing a rectangular coil of 20 turns and of length .50m and width .40m The coil is pivoted so that it can rotate freely on an axle. The coil is shown lying horizontally in a magnetic field of uniform stength .60T. A current of 3.5A is passing through...

Hi everyone. I'm trying to build a robotic "arm" to move an object along one axis, the idea is to put a dc motor connected to an H-brigde which is then controlled by a microcontroller, the dc-motor will be attached to the object I intend to move by a cable. Since the objective of this is...

i want to power 2 perm 080 dc motors in an EV application, i want to know what batteries will be a good match motor specs-- Typical system performance. Voltage: 24 V Angular-velocity constant: 291 rpm/V Torque constant: 4.64 ozf·in/A Terminal resistance: 0.0236 ohm No-load current...

Hi, I have troubles solving this question: Given the general DC motor governed equation, find the control voltage such that the speed w tends to constand reference input w* and the convergence rate is determined by the desired eigenvalues L1 and L2. I think it's easy to find the control...

i was wondering y there still got some dc motors,coz ac motors more powerful...can anyone tell me y?

dear members i want to design speed control circuit for 24v dc permanat magnet motor in both direction if anyone have ideas or circuits please post here. it may be great help to me. Thanx in advance

Does anyone know where I can find 3 Volt DC Motor Performance Graphs on the web? I'm looking for something like this, but with a 3 Volt motor. My googling has yet to find any relevant results. Thanks in advance.

Hi - can someone please help me with the following - I am mechanically minded not elecrically so please do not pick on me - I purchased a DC motor and gearbox (worm and wheel) from ebay (item 3858047682 if you want to look at it) - now it is supposed to work at up to 20 volts DC - now I was...

hey, I've been looking EVERYwhere for equations for torque in a DC motor. I've come accorss plenty too: T = µBsinθ and T = k(magnetic flux per pole)I <- where k is a "mechanical and conversion constant" and I is the current in the armature, and i couldnt' find the magnetic flux symbol...

I really need help in calculating the magnetic field generated by a horse-shoe shaped solenoid which is being used as a permanent magnet in a DC motor. The calculation is VITAL (well, I think so) as I need it to be able to predict the angular speed (in revs per minute) of my motor. If...