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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0answers
25 views

Cheap High Torque Motor [on hold]

I'm looking for a motor (brushed/stepper/stepper)(not brushless)(probably geared) that has at least 30 kg/cm of torque, less than 15 USD (I have to buy 34), less than 100 grams, and at least 60 RPM ...
2
votes
2answers
30 views

Interference from motors on PWM signal

Am building myself a robot chasis that is RC controlled. There is an RC receiver attached in solution and I have a remote RC transmitter. When the motors are not running, I get a perfectly clean ...
0
votes
1answer
36 views

soft starter code for avr

I need to control 2 DC motors (Maxon RE40) using an AVR (atmega328) through pwm. I was wondering what is the right way to approach the situation. Should I increment the duty-cycle at a specific time ...
0
votes
1answer
40 views

Diode Sizing for DC Motor H-Bridge [on hold]

I have a DC motor with the following specs and I'm trying to determine what size/type of diodes I need for my H bridge. I can't seem to find a good formula or online calculator. Are there certain ...
-3
votes
1answer
25 views

Can I use two of these H-bridges to control a 110VDC motor in both directions? [on hold]

I am using this H-bridge to control the speed of a 110VDC motor in one direction. http://www.amazon.com/RioRand-Driver-Controller-Spindle-Governor/dp/B00HUQY9HC Can I use two of these H-bridges to ...
0
votes
2answers
37 views

Controlling brushless gimbal motor (BGM2804)

I'm using a standard board for control this type of motor (SimpleBGC), this board uses an atmeg328p e some brushless drivers. I'm writing a simple code for turn left/right with some velocity, but i'm ...
0
votes
0answers
16 views

switching power supply causes DC motor to bounce

I am attempting to operate a 12 volt 6 amp average current DC gear motor with a Mean Well DRP-480-24 switching regulator power supply. When I connect it to a motor driver the output cannot operate ...
1
vote
1answer
36 views

Detecting motor stall with lm311

I have 9v DC motor that I want to use to lock a door. Control is achieved using an esp8266 board. The esp8266 also switches the direction of rotation via an H bridge. So far, so good.. Now I want to ...
-3
votes
1answer
68 views

H Bridge not working [on hold]

I've created an H-bridge for a dc motor that will be controlled by an arduino the bridge has one input and a not gate it has two state forward and backward thats the circuit: it doesn't work :/ How ...
-3
votes
0answers
43 views

How to drive a dc motor with the help of microprocessor? [closed]

how can I drive a dc motor or control its speed with the help of a microprocessor? should I use ADC(analog to digital converter)? how to connect the LED's and how I use the control word? which ...
0
votes
3answers
485 views

C or D batteries instead of AA [duplicate]

a few days ago I had a asked a question regarding longer lasting batteries for a walking robot built with a Tamiya gearbox. Since the AA batteries were being depleted too fast, it was suggested that I ...
0
votes
0answers
35 views

Convert motor speed to motor torque [closed]

I have motor speed as input in my math equations I want to convert them into torque because i want to control the torque not the speed There is any relation can help me use torque instead of speed? is ...
0
votes
1answer
37 views

Batteries for 3v gearbox

What kind of battery can I use to power a 3v DC gearbox, which can provide power for a longer duration? I have used AA batteries but they get depleted very fast. This is for a mechanical walking robot ...
0
votes
2answers
55 views

Brushed Motor Voltage Drop

First of all, I'm fairly new to electronics. I've been working on my own version of a miniature hovercraft just like this one http://www.thingiverse.com/thing:68639. I'm using an arduino pro mini for ...
0
votes
2answers
49 views

What kind of DC motor is this and what does the circuit do?

I've had this motor at least for 5 years (salvaged from something) and I remember it working then. However it doesn't work now (5 VDC mobile charger) and so I opened it up expecting to see just the ...
0
votes
2answers
121 views

Can current flow both ways through a transistor?

Last night I was experimenting with and motors and transistors. I was testing out NPN and PNP transistors to learn more about how they work and how I can use microcontrollers to control the speed with ...
0
votes
1answer
31 views

Brushed Dc Motor to Reluctance Motor

Brushed DC Electric Motor Use Brush to Energize Rotor's Pole at such an angle with respect to Stator Pole that it constantly runs, once applied dc power. Can same be achieved for reluctance motor, ...
1
vote
1answer
45 views

Monitoring of a System through an Arduino?

I am currently working on a project, where I will be doing the monitoring of a mechatronic system through the following measures : 6 x Motor temperature (Digital Signal) 6 x Motor Current (Analog ...
3
votes
4answers
2k views

Stacking batteries to get 200 volts and 21 amperes

I need to run an old DC motor that needs 200 V DC, 21 A full load; total 4200 W. I want to see if I can run it on V mount lithium batteries made for cameras. Each battery has: A ...
0
votes
1answer
52 views

Constant RPM Low Speed Motor drive [closed]

What is the best way to drive a motor (DC/Brushless/Stepper) at a constant, yet low RPM? It must have no jitter and no drift over time. I'm aware that some gearing will be required. Basically what ...
0
votes
0answers
32 views

What type of motor is it that I am after?

I would like to actuate a linkage using a motor from one end. Meanwhile, this linkage can be manually actuated from the other end. I would like to use a 12V motor which I can use to actuate the ...
0
votes
1answer
41 views

Electrical Braking: Why does voltage decrease with a decreased rheostatic load?

So I've been messing around with DC motors and electrical braking. BY placing a variable resistor across the motor terminals of the motor I've been able to vary the braking effect and observe the ...
0
votes
1answer
74 views

Braking a motor with power transistors

I am running 2 DC motors with 3 SN754410's: each motor gets one half of each bridge. Everywhere I look I see that pulling both logic inputs low with the enable high should brake the motor by shorting ...
0
votes
2answers
79 views

Control DC Motor with arduino

Recently I bought this motor and I want to control it with an Arduino. I read that I can drive the motor with a H-Bridge with TIP120 Darlington transistors, but the problem is that voltage in the ...
0
votes
1answer
80 views

Why won't the LED illuminate this way?

Attached a 9vdc motor to an LED to simulate a simple "generator" and I can get it to illuminate by swiftly spinning the motor in quick bursts, but if I connect a drill to the motor so there's a ...
1
vote
2answers
83 views

Necessary to lubricate old electric motor? [closed]

I'm in the process of digitizing some old audio reels. The reel-to-reel player is very old and it tends to slow down after it's been on for a while. I was thinking that maybe the motor needed to be ...
1
vote
0answers
40 views

Using map for DC motor instead of servo [migrated]

I am trying to use map command which is used to power servo 180 degrees as the potentiometer moves... Forward digitalWrite(I1, HIGH); digitalWrite(I2, LOW); ...
0
votes
3answers
43 views

effect, if any, of input voltage on RPM of DC motor

I bought a home coffee roaster which is designed to sit on a gas cooktop. It has a small geared motor which turns the drum, which sits above the flame. The target rotational speed of the shaft turning ...
3
votes
3answers
81 views

why the supply voltage of dc motor decreases when the motor load increases?

When I plot the supply voltage of a one-cell LiPo battery during the working period, I found that the supply voltage would drop dramatically when the motor is commanded to speed up. I think this is ...
1
vote
2answers
101 views

72 Horsepower DC Motor [closed]

The previous owner of my sailboat installed an electric DC motor and batteries. I cannot find any specifications on this motor besides what is on the plate on the motor housing. The plate says: ...
7
votes
2answers
82 views

How Do I Limit My Motor Current While Maintaining Voltage Drop Across It?

I am trying to build my knowledge of working with dc motors by using an IRF510 MOSFET to switch a motor on and off. Please refer to the schematic below to see how I hooked everything up. \$S_1\$ = ...
1
vote
2answers
81 views

Minimise backlash in DC geared motor

I am new here, I actually work on application programming. As a hobby I started to work with arduino and dc motors. Soon I ended up with backlash problems. Right now I am using a rotary encoder which ...
0
votes
1answer
129 views

DC motors not spinning at same RPM?

I'm attempting to make a quadcopter using an Arduino board (Blend Micro). I've wired everything up as such: When I run the following code just to test if everything is working, the motors do not spin ...
0
votes
3answers
58 views

Should I wire my electrical actuators in series, parallel or a combination of both?

I'm working on a project that requires four (4) electrical linear actuators to work together. They must be driven at the same speed, simultaneously. Let's assume that I have four identical actuators ...
0
votes
2answers
38 views

How can I control the pulling power of a DC motor?

I have a project where a DC motor needs to pull on a yarn and keep it a constant tension. The tension also needs to be adjustable. I have tried to google this but it seems like I am not asking the ...
0
votes
3answers
76 views

Running 3-6V motors with 7.2V [closed]

I'm using the popular DIY motor: Which his operating voltage is claimed to be between 3-6V. I'm using a battery of 7.2V. I know that running the motor outside the recommended voltage range might ...
3
votes
2answers
174 views

DC motor and power

With DC motors, I believe the graph below depicts the typical performance: Does that mean, even for a high speed motor with a gearbox for speed reduction, the same characteristics apply? That is, ...
1
vote
1answer
44 views

Washing machine / microwave motor - AC or DC

If I take an old washing machine motor and try to convert it into a generator would it work and if so would it generate AC or DC? Same question with a microwave motor. I know it uses permanent magnets ...
-2
votes
5answers
47 views

what will happen if i supply 12v with stall current of 3 amps dc motor with 24volt and limit the current at 1 amp?

I have 12 volt dc motor with 3 amp stall current 133 rpm and 8.8 kgf tourque. I supply the motor with 12 volts and when I measure its current it was 2 amps with 133 rpm. I need to make it faster as I ...
1
vote
1answer
55 views

A question about using PID to improve transient response for a DC motor

I have used PID a couple of times, but there is one thing I haven't been able to understand from any literature/textbooks. If I run a DC motor from a 12v battery for example, how can PID improve the ...
2
votes
2answers
89 views

Function of characteristic curve of DC motors

I have found in the following graphic the characteristic curve of a locomotive with six DC series wound electric motors at 3000V. As a translation: the y axis describes, on the left, the force in tf ...
2
votes
1answer
115 views

How to suppress voltage spikes caused by USB fan on ATX 5V rail?

I bought a cheap largish USB fan and plugged it in to the 5V rail on my adapted ATX bench power supply. Immediately, the ATMega328P that is present on the adapted ATX supply started to act ...
8
votes
3answers
1k views

In a brushed DC motor, why do the brushes have springs?

In trying to understand brushed DC motors, this post has been very helpful but I still have some fundamental questions about the brush mechanism. For instance, what is the purpose of the spring? And ...
0
votes
1answer
60 views

The “Miller” 1381 solar engine circuit problem

I was following the instructions on this page: solarbotics.net/library/circuits/se_t1_mse.html to try to build a "Miller" solar engine, using a solar panel generating ~4V to drive a small DC motor. ...
0
votes
1answer
39 views

DC Fan using less than half of rated current. Looking to overvolt

I have a project involving a 200mm 12VDC PC cooling fan (FS-200RB) that will be used for cooling me - not a computer. The fan is labeled: 12V DC / 0.42A / 5.04W ...
0
votes
1answer
46 views

Help for a small project for a small electrical circuit?

I just want to know that if I connect a fan with a dc motor, then as the fan rotates with the help of wind, will it generate power? and how much? my second question is if it does then how can I use ...
0
votes
1answer
58 views

How to pick a stepper motor

I'm building something that I want to control from mcus, and while I'm fine with the MCU part, I'm in the dark about motors and want to avoid buying too many of the wrong ones while I figure it out. ...
0
votes
2answers
169 views

smooth a DC motor movement

I have a DC motor (controlled by an arduino MEGA) and I plan to move some 3D Printed gears and a pulley. I have a problem with the belt jerking when power is applied to the motor through the arduino ...
0
votes
2answers
57 views

Can you safely use a lower voltage on a DC motor?

I have some pepper seedlings I'm starting indoors and I'd like to set up an oscillating fan for ventilation. I found an old one in my garage meant to plug into the cigarette lighter of a car. It's ...
0
votes
2answers
51 views

How do I limit the current supplied to a DC motor?

I am designing a robot and my motors are taking up too much current when the robot runs into a wall or has the motors forcefully stopped. How do I limit the amount of current I give the motors?