An electrical actuator converting electrical energy into rotational motion.

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4answers
85 views

DC motor causing noise on the power line

I've been building a circuit where I'm controlling a motor using a bluetooth module + phone. I've been having some problems, which mostly are fixed (see topic: previous topic). The main problem I'm ...
0
votes
1answer
79 views

How to use arduino nano to switch an 230V AC motor on/off?

I want to switch on and off an 230V AC motor with a relay what is controlled by an arduino nano. The on time and off time would be able to set by a 3-position slider switch. So would be 3 different ...
-1
votes
2answers
66 views

DC motor vs Stepper motor vs Continuous servo - Which one should I use? [closed]

I'm about to build a robot arm (trust me, I've already got most of it down), but I don't know which type of motor to use. From what I understand, DC motors do the same thing as Stepper motors but ...
-1
votes
1answer
41 views

Stepper motor driver board

Hi I'm planning to make a motor driving circuit on a perfboard. I'm new to electronics so please bear with me. In the past I've wired up stepper motors and run them correctly using microcontrollers. ...
0
votes
3answers
74 views

Mosfet motor problems with bluetooth module

I'm playing around with a bluetooth module and want to control a motor using the module and a phone. I manage to control a small motor (±30 mA), but as soon as I'm connecting a bigger motor I'm ...
3
votes
2answers
77 views

Small DC motor Heating up!

I am just trying to build a small fan to keep my Mac a little cooler from outside. So I have this little Box Design I made. Now, I'm a total noob at this thing so I need beginner level help here. I've ...
1
vote
0answers
60 views

Using a fruit or salt-water battery to power a motor

I´m trying to build a fruit or saltwater battery to power a motor. From my 8 cell saltwater battery connected in series, I get a reading of 5V or so and 2-3A... but it won´t fire up my 5V DC motor. ...
0
votes
0answers
18 views

DC bushless motor position tracking in gimbals

I see that gimbal motors often are DC brushless, like this one. However, how is position tracking done? There doesn't seem to be sensors integrated and they only have 3 wires (3 phase?). Position ...
-4
votes
1answer
71 views

What kind of a Switch is this? How can i use this Switch [closed]

I found this switch in DVD drive, I think its a kind of mechanism which reverses the polarity of the motor. If so How can I use this with arduino uno? THis link might be useful : http://www....
6
votes
4answers
2k views

Why are motor capacitors huge in physical size even though their values are in uF range?

When I see some teardowns of single phase induction motors on the internet, I see their capacitors look like: Why are they that big in size compared to other caps, even though their value is in ...
-2
votes
1answer
62 views

Modification of a 3 phase AC motor [closed]

There is a permanent-magnet synchronous motor with an external rotor that I want to explore and possibly modify. To do this I need some answers to my simple question: For a given shape of stator ...
0
votes
2answers
43 views

Electric latch for math toys

Please fix my tags. I'm making a series of interactive puzzles for use in classrooms. One of them is an equation graphing. It will have a grid of screws stuck into wood, with the axis drawn on. ...
0
votes
2answers
93 views

How to change logic when system shuts down

I try to think on a good way to control motor when I shut down the main PCB (which includes the MCU). How the system works today is when it's ON, the MCU enables the motor, the motor moves a ...
0
votes
1answer
59 views

Stepper motor reducing torque

I have a 5V stepper motor with a 1/64 gear reduction; it looks like this: When at rest, I can't turn the shaft with my fingers. However, when the shaft turns, I can. It seems that the torque is ...
1
vote
1answer
104 views

Using a single phase induction motor equivalent circuit in LTspice

I was planning to simulate a circuit which will control a single phase induction motor in LTspice where mains is 230VAC 50Hz. In my previous question, I failed to find an example: Modelling a "...
1
vote
1answer
53 views

Modelling a “single-phase permanent split-capacitor motor” in LTspice

I'm planning to use an AC fan in an LTspice simulation. The AC fan is made up of a single-phase permanent split-capacitor (PSC) motor. Here is the actual fan: http://uk.rs-online.com/web/p/axial-fans/...
0
votes
0answers
54 views

Why won't my motor move from my Teensy 3.0?

I'm using the simple example exactly from here except I've changed pin 4 to pin 10 and instead of using an arduino I'm using a Teensy 3.0 However I cannot get it to work, the motor never starts ...
0
votes
1answer
68 views

Motor oscillates when driven by L293D [closed]

I've got problem with steering DC motor with L293D and Arduino. I'm using DC motor from old inkjet printer and a quadrature optical encoder from the same printer to track the position. When I'm moving ...
0
votes
1answer
47 views

Different amperage with a normal and a hook Multimeter?

I am measuring the electric power (P = VI) in a gear-motor. I measure it of two ways. One way is measure with a multimeter the resistance of the motor, then with V=RI, I measure the current, then I ...
3
votes
2answers
85 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
2answers
47 views

Parallel motors on the same output

Am I getting motors correct? I'm building a third party psu for a slot car race track. Obviously easy bit is transforming 240Vac down to 12Vdc. But I am unsure how thiswill react with my motor. THe ...
0
votes
3answers
215 views

Why can't I vary the speed of a dc motor with only a potentiometer?

I made a simple circuit with a 9 volt battery, a dc motor, and a potentiometer. The positive of the battery is connected to one side of the potentiometer and the negative to the other. One side of the ...
-2
votes
1answer
49 views

Speed and direction control of motor by using IR & 555 on Proteus. (Circuit with errors is attached.)

I am trying to control motor direction & speed by using IR and 555 on Proteus. Circuit and errors images are attached. Please help me solving this quagmire.
0
votes
1answer
72 views

Behavior of power supply and DC motor for voltage/current combinations?

Are the below statements correct? Marked in Bold and Italic are my doubts! Unregulated power supply (Battery?) If supply current rating > motor current rating --> No problem since motor pulls only ...
0
votes
1answer
33 views

Questions about a relay controlled AC fan setup

I need to switch an AC fan by a DAQ board's analog output. Here is the setup in my mind for the moment: The DAC of the data-acquisiton board can output 0 to 10V DC and can deliver max 5mA current. ...
1
vote
2answers
78 views

DC Motor Speed Control Board

I have a 120VAC DC motor speed controller (diagram attached as picture) it works very well, however in the circuit there is a 5000K POTENTIOMETER that controls the actual speed/voltage - The ...
4
votes
1answer
66 views

Unknown resistive disk in parallel with AC motor capacitor

This assembly is the motor connector for a Grundfos U15-38SPA circulating pump, which interfaces to the capacitor (2uF) and power supply (220VAC). Between the two brown wires leading to the cap is ...
1
vote
3answers
62 views

How can I tell if a serial connection is sending bytes okay?

I have a Teensy connected to a Pololu motor controller. If I send bytes over USB (using Pololu Serial Transmitter v1.3) I can get it to work (For instance, 0x85 0x00 0x20 makes the motor run at slow ...
0
votes
3answers
45 views

AC motor control

I have a simple AC motor, a pump. There is no kind of regulator in terms of speed or pressure. Its supply is 230 Vac, 50 Hz. If I decide to lower its supply voltage, what happens? it will require ...
1
vote
2answers
58 views

Permanent magnet DC motor earth wire

I have just inherited a piece of equipment that is powered by a 12V DC permanent magnet motor. My hope is to drive it using an Arduino PWM and a H-Bridge to manage the current requirements (7.3A ...
0
votes
1answer
38 views

High Torque DC Motor

I am trying to use a high torque dc motor with gears to drive a low torque dc motor but with higher rpm. Is there a relationship between the current draw of a DC motor with the torque? I have seen a ...
0
votes
1answer
191 views

Controlling a single phase AC fan with a 0-10V DC input

I have a fan motor which is a permanent split phase single phase capacitor motor: http://uk.rs-online.com/web/p/axial-fans/2781543/ I currently control this fan's speed with the following controller:...
0
votes
2answers
61 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 ...
-1
votes
2answers
96 views

Transistor to switch a motor not working - what's wrong?

I've been working on a project and cannot seem to get it right. I'm using an arduino to control a motor, and turning it on and off via a transistor. I had an issue with it not working, so I posted ...
0
votes
1answer
35 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, ...
0
votes
1answer
106 views

Does a motor really need all this circuit to run?

This is the pcb of an Ikea screwdriver, you can see I desoldered the 18650 battery, from B+ and B-, and desoldered the motor from the legs of the switch which is on the other side. So the circuit ...
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 ...
3
votes
3answers
75 views

Motor Induction motor design specifics

I wanted to know the difference between the motor(s) used in the Tesla Model-S and commercially available motors. eBay Motor^ I have been very confused. They both are approximately the same size ...
1
vote
2answers
70 views

What is the purpose of these extra 'level shifter' BJTs on a MOSFET H-Bridge?

I am working on a 2WD Arduino project. Making the H-Bridge myself, and not using an IC like the L293 is a requirement for my project. After searching a while, I came across this, and based on this I ...
0
votes
0answers
30 views

Explain please this half bridge circuit by ChaN

I'm analyzing ChaN's passive stroboscope project and have some troubles in understanding the motor bridge circuit: Here the full circuit. I don't understand why need C3, D3 (both), D4, and L2. And ...
-1
votes
1answer
60 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
33 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 ...
-1
votes
1answer
35 views

specific driver and motor combination

I am planning to make a 3D printer for a school project and would be grateful for your help. I want to combine the following driver [L298N Dual H Bridge DC Motor Driver IC; Driven part of the terminal ...
0
votes
4answers
161 views

How do I get a position from an encoder?

I have a motor that drives a rail which I need to know the position of. I have an AM102 encoder attached to the motor. But am unsure how to get a position from it. I have powered it up and attached ...
0
votes
1answer
43 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 ...
1
vote
1answer
26 views

reducing input voltage to motor

I have a hypothetical question about running a DC motor on lower voltage than it is designed for. Lets say I have a 2hp 100VDC (yes, Direct Current) motor that I want run on 12 VDC. The motor is 2hp =...
-1
votes
1answer
54 views

Is there a programmable remote vibration motor? [closed]

I am a developer and loves to develop all kind of things for me to simplify my life. Now I'm looking for the possibility to wear a tiny device that receives signals from an app of mine to vibrate when ...
1
vote
1answer
45 views

Acceleration time of unloaded motor

I want to use a motor to generate musical tones by spinning a disk. The disk will have optically printed sound waves on it. I would like to know how fast the motor will be able to change speed from ...
1
vote
1answer
102 views

variable frequency three phase AC

I want to generate 1-150Hz+ three phase AC. Output voltage at maximum frequency would be around 240VAC and current around 40A. I have a few 60Hz three phase induction motors, drive shaft coupler, and ...
3
votes
5answers
288 views

How to avoid damaging relay used for controlling motors?

I've got a circuit with two DPDT relays controlling a motor - the diagram below is borrowed from a related but different question. RLY1 turns everything on and off, RLY2 switches the direction of the ...