A common actuator in robotics; it's usually made of a static magnet (stator) and a set of moving inductors, acting as electromagnets, connected to the circuit through brushes. Brushless motors use phased clocks with electronic circuitry to generate motion.

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32 views

12v dc motor transfer function

I am working on a dc motor speed control project in proteus. And currently i am doing the tuning of PID controller and for tuning i am trying to figure out the transfer function of dc motor. Now what ...
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1answer
38 views

how to select motor torque [on hold]

I am building an automatic mopping machine. this machine is powered through 230v AC supply . In order to move this machine I am using DC motors. how to calculate the torque of the dc motor that is ...
1
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1answer
34 views

AVR's and DC Motors\Servos

I've been browsing around looking for some information on motors\servos and AVR's (my MCU of choice). Motors\servos are in my gray area, meaning I'm still not too into them, but I could do something ...
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0answers
27 views

Electric motor for a sliding gate [on hold]

I am doing a micro controller based project to control a sliding gate at residence. But am stuck at choosing the right motor for sliding the gate. The gate weight is around 80-100kg. Help me choose ...
0
votes
1answer
77 views

H bridge getting tiny output voltage

Here is the H-Bridge I am planning on using I am using 2 "FQP7P06 P-channel mosfet"s and 2 "IRF610"s for my N-channel mosfets. This H bridge is to drive a DC motor that's rated for 12V, 0.8A I have ...
-6
votes
0answers
108 views

Why didn't Tesla opt by Switched Reluctance Motors? [closed]

After reading the virtues of Switched Reluctance Motors, I question why didn't the Tesla cars company opt by them instead of AC triphasic motors?
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0answers
32 views

DC Iris control circuit

Does anyone understand how a control circuit for the DC Iris found in video camera lenses works? From my research I see that it is a four pin interface two pins for drive, and two for "damping". I ...
-2
votes
1answer
54 views

DC motor working on Arduino but not Attiny with batteries

I have a simple working circuit to control a DC motor with an Arduino as indicated in the Arduino examples. For instance, ...
0
votes
1answer
73 views

Optical encoder in Proteus

I am working on dc motor speed control project in proteus and for the feedback i am using optical encoder.Dc motor speed is calculated by counting pulses from encoder. But i wanted to know what is ...
-1
votes
1answer
43 views

Functions in Mikroc [closed]

Below is my code it gives error as "all functions and variables not defined" Please help I wrote a program for speed control of dc motor for pic18f8722 In Mikroc Please help ...
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votes
5answers
420 views

Can someone check over my schematic?

This is the first schematic I have made that was not a simple LED. I want to know if it seems good before I go and build it (and buy the parts). Here is the schematic: Here are a few of my ...
1
vote
2answers
70 views

Beaglebone black gets shutdown signal when I move rc motors

I have a beaglebone black that I tucked inside an rc truck. I removed the radio control chip. Everywhere it had 3.9 volt logic I put in a 3.3v gpio control from the beaglebone. It works great I'm ...
1
vote
2answers
59 views

Reduction of DC motor noise

I am designing a circuit with a DC motor (http://www.jaycar.com.au/products_uploaded/YG2732.pdf) and some other stuff including a MCU and a LASER, all driven from a single 12V source and am concerned ...
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votes
1answer
34 views

Motor powered on and brakes disengaged for three days, should I be worried?

I have a brushless DC motor which runs at 24v which I left on for three days without noticing. The motor just has a ssi motor feedback. The motor was not running as the software which commanded it was ...
0
votes
1answer
61 views

Is there any way I can power my 120-220V AC motor from a battery

I am building a new robot, it's a little bit heavy, so it's hard to find a motor that can push it. I am thinking of a way to use machines at home (I have two options: Automatic hair drying machine and ...
1
vote
1answer
52 views

How do current spikes effect component lifetime?

My Master's thesis project works with a system that mechanically prevents a DC motor from stalling and effectively thresholds the amount of current the motor draws and removes large current spikes ...
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2answers
56 views

How can I find out the actual rpms my dc motor at any given moment?

In my next project it will be very helpful to monitor the speed of my dc motor. How can I accomplish this?
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votes
0answers
51 views

Motor driver PWM not working?

I have two Motor Driver L298N dual H-bridge, i have each ENABLEA and ENABLEB from both drivers share a PWM pin in the ARduino uno board like so: ...
0
votes
4answers
67 views

Stopping a DC motor using an H-bridge: forward+backward vs. 'brake'

Using an H-bridge, you can stop the DC motor at a certain position by applying a 0101 or 1010 signal to the 4 terminals. You can also stop it at a certain position by driving it forward then ...
0
votes
2answers
86 views

Mosfet type to drive a 100A DC motor using pwm

I have a bunch of custom made DC motors. They are supposed to work in a range between 80Vdc and 120Vdc. Nominal power is around 800-1000W (they're custom made for a custom application, so specs are ...
0
votes
2answers
44 views

How do I determine terminal characteristics of a dc motor with known torque and angular velocity?

How do I determine the terminal voltages and currents that will be produced by turning a dc motor at a known angular velocity and a known torque? I know that for a dc motor, the load torque has a ...
0
votes
1answer
32 views

DC Motor inertia voltage drop

following a tutorial on the web I created in LTSpice a DC motor model, but I have a question about the results, the model is: and this is the spice netlist: ...
1
vote
3answers
124 views

How to compute the effective voltage across a DC motor driven by a pulse train?

I'm driving a DC motor with a pulse train and effectively reducing the battery voltage to control the speed by adjusting the duty cycle. Pretty standard. What I'm unclear on is whether to use V_rms ...
0
votes
1answer
62 views

How do I supply power to two 18v 2.4 amp motors?

I have two of these motors: http://www.radioshack.com/radioshack-super-speed-9-18vdc-hobby-motor/2730256.html#q=motor&start=6&tab=tab1 According to Radioshack's specs (which may be off, not ...
0
votes
2answers
126 views

How to switch between two DC power sources powering a motor on an electric vehicle?

Background: For a university final project, my student group is investigating the possiblility of powering a motorcycle with two seperate batteries, each of a different chemistry (Lead-acid and ...
0
votes
0answers
24 views

Low power, low duty cycle, full speed dc motor timer

I need to drive a 12v dc motor drawing 300ma under load. It only needs to run about 4-5 seconds per min. But the run and idle times need to be adjustable with some degree of accuracy. Once ...
0
votes
1answer
65 views

Behaviour of DC series motors

I'm having trouble implementing a DC series motor simulation, and I think this is due to the fact that I do not understand the motor behaviour itself. Notice that the mechanical part of the ...
1
vote
2answers
98 views

Is it possible to figure out the specifications of an electronics piece without datasheet?

I'm brand new on the "electrical engineering" scene with my Arduino and I have a question about random electronics. I've been taking apart some old phones, salvaging LEDs, motors and speakers, mostly ...
0
votes
2answers
80 views

Automatic 12V plant watering system?

I'm planning to make a plant watering system . There is a beeper so it will alert us when the soil is dry.I have got a 12V DC motor . So i'll be removing this beeper and i need to add this DC ...
0
votes
1answer
61 views

Can a gear motor w encoder be 60 ft away from controller?

This is my first time posting so please forgive any ignorance that may come across. I'm considering hooking up two gear motors (Devantech 24V, 49:1 Gear Motor w/ Encoder) to a motor drive (MD49 - ...
0
votes
0answers
36 views

Is the motor constant of separately excited DC motor the same as for series excited DC motor?

If I have one DC machine but I use two different excitations: separately excited and series: The formula's of the separately excited DC motor is: $$E = K \cdot wm$$ $$Td = K \cdot I_a$$ Assuming ...
0
votes
1answer
71 views

Voltage divider on AC current?

I have a 90V PMDC motor with an triac/diac speed controller. Although, I am not sure, the power output is around 90V, but it may be higher. The torque is fairly constant, but it hiccups at the lowest ...
0
votes
2answers
91 views

DC Motor reversing relays using a micro switch [closed]

I'm looking to use relays and 1 micro switch to reverse the polarity of the circuit. I will need a simple ON/OFF switch to have the motor turning in one direction and then when the micro switch is ...
0
votes
0answers
38 views

DC series motor - changing field resistance

Suppose I have a DC series motor with an armature resistance of 0.4 ohm and field resistance 0.6 ohm. Suppose shaft torque = developed torque. Assume magnetic linearity. With a blocked rotor test of ...
1
vote
1answer
48 views

Circuit with reversing polarity and two microswitches

I am building a time-lapse camera slider with the following components 2rpm DC gearbox motor PWM with reversible DPDT switch to reverse motor 2 SPST Microswitches I am trying to wire the ...
0
votes
0answers
60 views

DC Vibration motor issues

I have a simple DC (toy) motor which I'd like to use as a vibration motor for my project. The motor is controlled with an Arduino, but powered from a separate 5V voltage source (using an 2N3904 NPN ...
0
votes
1answer
80 views

How to determine DC motor voltage

I am building a new controller for an existing robot. I need to know the voltage to send the motors. I don't want to remove the motors from the robot, but am able to take measurements while it ...
0
votes
3answers
84 views

Circuit Starving Question

I have a circuit where 2 DC motors are connected to 4 AA batteries and being controlled by an Arduino microcontroller. Whenever the motors start, they starve other components in the circuit and it is ...
1
vote
4answers
153 views

Is Power consumed by a motor under various load conditions constant?

Does a motor (dc /Induction/Synchronous ) consumes more power when operating at higher load than when operating at some lower load? Or power consumption remains constant/same in both cases? What I ...
1
vote
1answer
63 views

Motor speed control mosfet

I have a Raspberry Pi and I want it to control DC motor speed. I make the pi output 3x3,3V for controlling the speed. I need circuit that works like this; when one output gives 3,3V motor have 6V, ...
0
votes
2answers
104 views

Looking for a high speed, high powered motor [closed]

So I'm trying something that has been attempted before and that is to have an electric turbo charger. essentially the goal is to spin a compressor wheel (20 grams) at 150k RPMS and sustain it for ...
0
votes
0answers
35 views

dc motor fuzzy logic speed control

I came across this separately excited DC motor model(USING matlab) using PI control for speed control.I am having difficulty in understanding how armature voltage is kept as constant.If the model is ...
-1
votes
1answer
54 views

Dead-reckoning vs feedback for motor position control of turntable

I am constructing a small turntable that holds a plastic cup and should be controlled to stop at one of eight positions. (Where it will receive a shot of liquid; think "Auto-cocktails"). I'm wondering ...
0
votes
3answers
117 views

NPN Transistors for motor control

I wondered if someone could offer advice here. I have a 3.3v dc motor. Obviously, i can change the direction it turns by flipping the + an - leads round. Can i acheive the same thing but with 2 npn ...
0
votes
3answers
181 views

Controlling a motor using a PWM

Im trying to use a Freescale FRDM-KL25Z, I have been looking at the datasheet to see if I can find the maximum oputput current of the pins with no luck, im assuming its 500mA since its powered via ...
0
votes
2answers
69 views

How to stop my motor from resetting my microcontroller?

I'm assuming (no way to verify) that when the motor pulls too much I get voltage spikes which cuts out my microcontroller. Here's my circuit, any suggestions on how to fix this issue? The left chip ...
0
votes
3answers
633 views

Change Direction of 12v DC Motor Rotation using Relay

I want to make a circuit to change 12 Volt DC Motor direction and move some thing between two points. Using Relay or some basic limit switches.Like this Image. I got a Circuit As i want... AUTOMATIC ...
1
vote
2answers
102 views

H-Bridge flyback diode selection?

I am wanting to make a motor driver using a SN754410 Quadruple Half-H Driver IC. The SN754410 requires external flyback diodes. Here is an example circuit: My question is, how do I choose which ...
0
votes
1answer
87 views

H-Bridge vs Mechanical Speed Controller

What's the difference and trade-offs between a h-bridge motor controller and a mechanical speed controller for controlling a brushed motor in an RC car? I have a cheap RC car that I'm trying to ...
0
votes
1answer
74 views

Understanding motor controllers and example application

I'm rather new to the world of motors and motor control circuits - about all I know is that you need one. My intended application is to take a DC motor and create a "servo", which I understand to ...