An electrical actuator converting electrical energy into rotational motion.

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1answer
17 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 ...
-2
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0answers
36 views

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

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 ...
-1
votes
0answers
35 views

Simple Electric Motor [on hold]

I want to make a really efficient but simple brushless motor by using a magnet, ferrite core, and coil. What are the formulas I would need to calculate the force/ power of the magnets and coils? ...
0
votes
1answer
25 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
1answer
25 views

DC Motor Speed Control Board (MSCB)

I have a DC motor speed controller (diagram attached) it works very well, however in circuit there is a 5000K POTENTIOMETER that controls the actual voltage (speed) to the motor. I am controlling a ...
0
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0answers
33 views

Convert motor speed to motor torque [on hold]

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 ...
3
votes
0answers
29 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 ...
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vote
3answers
53 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 ...
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0answers
31 views

Increase Motor Speed By low Voltage (AC) [on hold]

i want ask question How i can increase motor speed AC not DC ? IF i set arm from this arrange motor , gar , arm . this arm will increase this speed . if yes what is relations with it and speed ...
0
votes
3answers
39 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
41 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
29 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
101 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 ...
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votes
2answers
47 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
78 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
27 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
96 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 ...
-2
votes
0answers
42 views

What sensors should be used to analyze vibration of a hard disk? [closed]

What kinds of software readable, electronic sensors can be used to monitor the condition of a hard disk? We want to be able to detect when a hard disk is not operating correctly. Or is about to ...
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
54 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
51 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
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0answers
29 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 ...
0
votes
1answer
50 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 ...
-1
votes
1answer
34 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 ...
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0answers
24 views

Piezomotor control

I'm trying to control a piezomotor, here is his datasheet, and drive it with the TMC261, however I've read that a piezomotor requires a sinusoidal wave so an DAC in indispensable but also I've found ...
0
votes
4answers
130 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
40 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
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1answer
25 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
42 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
38 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
88 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
266 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 ...
0
votes
2answers
72 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 ...
2
votes
1answer
83 views

What kind of motor to use in a PCB drill?

I'm trying to use this super-cheap PCB drill that I bought recently, but it's too weak for human convenience (takes about 10 seconds to get through standard 1.6mm FR4). The drill uses a small DC ...
1
vote
1answer
66 views

driving motor DC 24V with MOSFET

this is the basic shematic, i added a freewheel diode with the connector of the motor . Im driving a DC motor 24DC 1A, im using PWM 500Hz from microcontroller and MOSFET IRF740 with a driver TLP250 ...
0
votes
1answer
55 views

how to add switches to the end of the rotation that will cut off a stepper motor so I don’t damage anything at the extremes of the motion? [closed]

I need to work on how to add switches to the end of the rotation that will cut off a stepper motor so I don’t damage anything at the extremes of the motion. I'm using a Dual - H Bridge to control the ...
1
vote
0answers
41 views

bernina motor capacitor exploded. How to repair motor [closed]

My girlfriends Bernina sewing machine exploded and catched fire. It made a lot of smoke, probably wasnt very healthy. Now what the bernina store said was to get a replacement motor but that also means ...
0
votes
1answer
37 views

Low RPM, Low Power, Low Torque Motor (to be solar powered)

I am trying to build a small contraption/artwork to be mounted on a wall indoors. Ideally it will solely solar powered from a small solar panel (10cmx10cm). It needs to spin slowly anywhere between ...
1
vote
2answers
82 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 ...
0
votes
0answers
17 views

drv8833 motor driver with lipo-2s problem

I am using a drv8833 motor driver for brush motor and i have one problem. When i'm connecting its VIN and GND to powerbank battery, brush motor to BOUT12 and BIN12 to atmega 328p, setting BIN1 to '1' ...
-4
votes
3answers
51 views

How to match a motor to a generator to make ample power [closed]

If we use a high speed motor and reduce its rpm hence gaining more power from it, and then use that to run a generator which generates about double the power being consumed by the motor at that speed ...
1
vote
1answer
41 views

Efficiency comparison between six step and FOC for a given motor

For a given PMSM motor with sinusoidal back-EMF, it can be driven by either six-step (as in drone applications) or by FOC (as in servo control). However, for a given motor and given DC link voltage, ...
0
votes
2answers
95 views

PID and motor control by PWM

I am having a potentiometer which gives an analog voltage in range of 0-5V. I am considering this POT as throttel input for motor. If i change the pot speed increase and decrese on the basis of ...
3
votes
3answers
78 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 ...
0
votes
1answer
67 views

How to double the power supplied to an electric motor?

Need some help here: Assuming I need to power a toy motor with a 3V battery... 1. Is there any way for me to generate more power to the motor, at the cost of duration? (Run faster but for a while ...
0
votes
2answers
47 views

What permanent magnet motor is the best for the bike generator? How to decide about wattage?

I am new here.. I would like to build my bicycle generator with permanent magnet motor similar to this one Bicycle Power Basics Basically, I want to run my pedal cinema with a bike generator. I am ...
0
votes
0answers
39 views

Why does a servo motor reset to a different neutral position occasionally?

I have a servo motor that I am trying to control with an arduino board. Its pulse width range is from 900-2100 us with a midpoint at 1500us. It has a range of motion of 180 degrees. Occasionally when ...
0
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1answer
32 views

AC induction motor circuit and stall current

How can I describe the stator current of a 3-phase locked/stalled induction motor by using equivalent circuit of the motor?
0
votes
1answer
63 views

Motor speed based on uF of capacitor

I have a single phase duct fan that that run by a capacitor and its running too fast. I don't need it at this speed. Motor: Single Phase Motor 78w @ ...