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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46 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 ...
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1answer
59 views

Unable to Power Arduino and DC Motors via 2 AAA Batteries

I am using 3.7 V 2000mah battery. I am stepping it up to power an arduino board via an NCP1402. It has a continuous output current of 200mA. I am trying to run two Micro Metal Gear motors with stall ...
2
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1answer
27 views

High Power H-Bridge with IR2125 Drivers Problem

I'm currently stuck on a problem when trying to drive a 140V DC motor using an H-Bridge with 4 high-power mosfets and 4 IR2125 drivers. I'm using as input to the drivers a signal generator of 5V in ...
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0answers
28 views

Does Armature current decrease as the load decreases?

I am being asked to find the speed of a 16.5kW shunt DC motor that is being supplied with terminal DC voltage of 300V when operating at 50% rated load with an armature current of 30A. I need to use ...
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1answer
22 views

Connecting two DC motors on a single driver channel

Is it a good idea to connect two DC motors on a single driver channel? Here are the motor specs: Operating Range: 6 - 12VDC · No load current: 40mA (6VDC) · No load current: 70mA (12VDC) · ...
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0answers
18 views

How to choose a single H-Bridge IC?

They all seem to pretty much offer the same features. On what basis am I supposed to compare single H-bridge IC's for a typical application of driving a smaller (<1A max) brushed DC motor, similar ...
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1answer
52 views

How to run Small Brushed Motors for Quadcopter with bare Atmega328 microcontroller?

I am trying to make a Nano Quadcopter using my Atmega328 microcontroller powered by a 3.7v 600mAh Lipo battery. I am using very Small Brushed Motors. If I directly connect motors to PWM pin of ...
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2answers
55 views

DC Motor drawing too many Amps

I have a treadmill incline motor that is blowing its circuits fuse every time it starts to run. This is the motor that lifts the treadmill up and down. The motor is labeled: Output: 65W Input 36VDC ...
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2answers
41 views

Motor for momentum wheel

I need a small dc motor for a momentum wheel. To conserve power the motor will be turned off once the wheel has reached target RPMs and left off until the RPMs fall out of the target range. This will ...
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1answer
36 views

High Side PWM motor driving circuit

I have two theoretical question about my circuit (that I have tested with a breadboard and it works, but I want to understand better some design choices): 1) As far the flyback diode is concerned, I ...
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vote
2answers
52 views

Mosfet PWM signal not square

I'm a beginner learning about electronics, currently trying to control a DC motor using a PWM signal. I got it to work, but want to understand what I'm seeing using an oscilloscope and optimize it. ...
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0answers
22 views

Increasing terminal Voltage and increasing Load torque - DC motor

If Ia decreases the developed Torque decreases and hence looking at the Torque-speed curve shows that the speed will slightly increase (Shunt or separately excited DC Motor). Question 1 But if you ...
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1answer
45 views

Effect on loading a DC motor - load torque

Can someone please give a (detailed) explanation (perhaps with formula's) of how the load (torque) affects the armature current of a DC motor (seperately excited or shunt or series) ? As the load ...
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2answers
55 views

How to transfer electrical power from stationary to rotational part.that can be used for POV display?

I have been researching how to transfer electrical power from stationary to rotational part. Some of them showed the means by using slip spring rings like in this website ...
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0answers
60 views

Supply for autonomous car with sensors and DC motors

I'll be using the Guibot Motorduino for an autonomous car project. This includes L293D motor driver and 7805 voltage regulator. The other components: Multi-Chassis - Tank Version with two DC ...
0
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1answer
85 views

How to control a motor with a photoresistor

I have a little 2 to 5 volt hobby motor that I would like to control with a photoresistor aka photocell. What is the simplest way to control the circuit? Is there a photo resistor with enough range ...
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2answers
70 views

Controlling an electric motor through labview without knowing its speed

I'm having a little trouble running my final bachelor experiment. My group and I are to find out what exactly causes extreme high frictional forces when pulling a steel cable through wet sand by ...
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2answers
74 views

Why does my 24 volt DC servo motor run at 5 volt DC and not at 24 volt DC?

Why does my 24 volt DC servo motor move with 5 volt DC drawing 5 amps, but does not move with 24 volt DC? The power supply is 24 volt DC up to 10 amps. Datasheet are available for the DS4S servo ...
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1answer
34 views

“Standard orientation” for stepper motors in data sheets

I just finished getting a SOYO 6V@0.8A unipolar stepper motor working, and wanted to know more about an issue I faced while doing so. I used the stepping sequence below with an L293D chip to drive ...
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2answers
55 views

Connecting two motors

Basically i'm doing a small project where i'm using 2 dc motors on a bicycle as generators connected to a usb module to charge smart phones, is it possible to connect the motors together to generate ...
0
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2answers
54 views

Controlling DC motor without Arduino motor shield

I am trying to make a line follower with the help of this tutorial. In the tutorial they have used Arduino motor shield. I want to know, is there any way to control the motors without using Ardumoto? ...
0
votes
1answer
28 views

Torque control with H-Bridge via direction pin

Using the LMD18200 (H-Bridge) and the LM3524D (PWM regulator) I should design a torque regulation. I've found a circuit in the LMD18200 datasheet which uses the current feedback to adjust the PWM. ...
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1answer
56 views

Digipot for DC motor

I am going to use a 3V DC motor (operating voltage 1.5 to 4.5V DC) and MSP430G2553 microcontroller. So which digital potentiometer should I use to control the speed of the DC motor?
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1answer
76 views

Jack type for a 12v DC motor

I have an Arduino with a motor shield and I use it to power 4 different DC motors. Motors are connected to the shield through a screw terminal. Since I am in the prototyping step, I am moving them ...
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0answers
17 views

Keeping two wheeled wall following robot straight [migrated]

I have a two-wheeled (two DC motors) robot that needs to follow the wall beside the robot. The issue is that the DC motors spin at different rates (because they are not identical, of course), so the ...
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1answer
41 views

Comparison of the efficiency of DC motor current limiting / control methods?

I'm using the wheels and motors of an RC toy car as a simple robotics platform. The car has 2 motors, one drives the back wheels, the other steers the front wheels. The steering motor is stalled by ...
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1answer
72 views

DC motors, AC motors, and Kv

As I understand it, DC motors have Kv values because their speed is determined by the applied voltage. AC motors don't have Kv values because their speed is determined by the frequency of the AC ...
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1answer
83 views

Measuring DC motor voltage with an oscilloscope

My current setup involves an analog controller board that is driving a DC motor and I would like to monitor the voltage being applied to the motor at all times. How do I physically connect the ...
0
votes
1answer
71 views

Beaglebone Black PWM Driver for 12VDC 1.05A Motor | Drive from Positive Side

I have several 12VDC 1.05A pumps I am using in my hombrew system which I would like to drive via PWM on my BBB. Each one will have a hall effect flowmeter attached so that I can get flowrates, totals, ...
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votes
2answers
93 views

Current reading, how does it work?

For a project I'm using an Arduino to drive a motor using a special pcb. In this board there is also a way to read the current drawn by the motor. Although I have the schematic I'm not 100% how this ...
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0answers
51 views

PWM for my air-compressor 15 Amp dc-motor

I have read some similar questions but didn't get the answer for mine. I want to make a viair 12v compressor run at a low pace to fill some tires very slowly drawing as few amps as possible. Could I ...
1
vote
0answers
62 views

Stepper motor to replace brushed DC motor to be used to start a gas engine?

I'm trying to decide if it would be possible to use a stepper motor to replace a current 12V DC brushed motor that is used to turn over a small (~149cc) gas engine for starting. The reason why is, I ...
0
votes
1answer
57 views

Current usage with multiple PWM controlled motors

I have a circuit that can use 25 A of current max, it is on a 25 A fuse. I am looking to control 4 DC brushless motors using ESC's. The trouble is that the motors are rated at 7A max current. I know ...
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0answers
54 views

PWM and flyback diode dependency

I have to choose components for a pcb motor driver, there is a dependency that I have to take into account between the PWM frequency and the speed of the flyback diode? If yes, what it is? Thanks
0
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2answers
92 views

Will these heatsinks be sufficient for my mosfets?

I need to control 10 12VDC motors at ~25Amps, so I decided to make my own mosfet H bridges to control it ( with 2 n chan et 2 p chan ). I will need 10 H-Bridge, so 40 Mosfets. ( 20 n chan and 20 p ...
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3answers
71 views

HEXFET PWM motor driver does not work

I'm trying to drive a motor for an academic project, using the circuit in the image. The STM32F4 Discovery board that I'm using in this phase of the project produces a 30Khz PWM at 3V, that is correct ...
0
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0answers
75 views

Arduino with 6 motors controlled by Android device

For our first year engineering project, we are creating a guitar tuning device. We will need to control 6 motors, each turning a small knob (<1 inch) against a 10-20kg string tension. Manually ...
0
votes
1answer
100 views

High Torque Brushless DC Motors in Small Package

I have a particular set of requirements that call for a relatively high stall torque for the space available (300 ozf-in for < 8cm length of motor). The motor would be operating at a relatively low ...
10
votes
3answers
583 views

Locking up a DC motor with constant supply a bad thing?

I am working on a little pen plotter project and for one of my motors (which supports the pen) I have used a small DC motor obtained from an old DVD drive. I have noticed that if I supply a constant ...
0
votes
0answers
84 views

How Can I Slowly Turn Container With Electric Motor

I am wanting to slowly turn a jar in the horizontal position -- like a hot dog at 7 eleven, only no heat or stepping required. The idea I currently have is to use 2 dowel rods with a low RPM DC ...
0
votes
0answers
105 views

I think I have burnt my 24V DC motor

I had a 24V DC motor connected to a Polulu motor driver which was connected to an arduino uno board. I accidentally connected a power supply instead of a volt-meter to both ends of the motor while in ...
5
votes
5answers
292 views

Can a motor's movement be improved to any arbitrary resolution?

For a project that I'm working on, I need motor rotation at extremely small increments -- my desired resolution is about ~0.15 degrees per minimum rotation step. Of course, most motors of reasonably ...
0
votes
2answers
150 views

How do you control 130-size DC motors with an Arduino (seemingly 20A DC motors)?

I'm a little confused on specifications and limitations here... I have 3 (130-size, I believe) DC motors I'm attempting to control with an Arduino. They are running off of a 7.2V NiMH battery pack, ...
0
votes
1answer
71 views

Am I misunderstanding the specs of this solar panel or electric motor?

I've been trying to figure this out, but the answers I've come up with thus far have been counter-intuitive. The solar panel's specs are as follows: ...
0
votes
2answers
84 views

Convert perpetual magnet motor output to 5 volt DC

Disclaimer: Hi, I was in the neighborhood (StackOverFlow) and just noticed this cool site. I have had this general wondering for a while now and I am not sure if my question is constructive enough for ...
0
votes
0answers
29 views

Can DRV8837 be used to drive two DC motors in all four ways?

Knowing that some motor drivers do not perform well under low input voltages, I have found that this works well; but how do I drive motors in the following four ways: ...
3
votes
1answer
186 views

Brushed DC motor control MOSFET selection

I want to control a brushed DC motor of the below specification: Motor: Permanent magnet DC brushed motor Voltage: 180V Current: 5 Amps RPM: 1500 The control method is PWM switching through a ...
0
votes
0answers
31 views

Power Supply Requirements [duplicate]

I am building some prototypes for my thesis but I am not sure how to buy the power source for them. I need to how to choose a proper power source(Volts, Amps, etc). The number of motors will vary but ...
0
votes
1answer
65 views

Using an H-Bridge like a comparator

I'm wondering if there's a way to use an H-bridge like a comparator- That is, if one input is greater voltage than the other, then the attached motor spins one way, and vice versa, and it doesn't spin ...
3
votes
4answers
784 views

DC Motor + 9 V battery + 270 ohm resistor = Nothing (Motor won't turn)

I'm trying to wire up a DC motor to a 9-volt battery with a resistor in between, and the motor just won't turn. It works if I connect the motor directly to the battery, but not with the resistor in ...