An electrical actuator converting electrical energy into rotational motion.

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2answers
112 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
68 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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3answers
63 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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3answers
48 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 ...
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2answers
62 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
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1answer
42 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 ...
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1answer
233 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:...
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2answers
70 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 ...
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2answers
108 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
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1answer
41 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, ...
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1answer
108 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
97 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 ...
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2answers
74 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 ...
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0answers
31 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 ...
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1answer
61 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
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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 ...
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votes
1answer
38 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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4answers
170 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 ...
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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
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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 =...
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votes
1answer
67 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
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1answer
48 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
108 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 ...
4
votes
5answers
318 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 ...
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votes
2answers
110 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
258 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
113 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
62 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
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0answers
101 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
53 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
92 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
26 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' ...
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votes
3answers
56 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
130 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
147 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
151 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
85 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 only)...
0
votes
2answers
79 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
1answer
40 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
106 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 @ ...
1
vote
2answers
79 views

Which oscilloscopes can reliably measure losses in an inverter for an AC motor?

For my next project at my workplace I am looking for an oscilloscope which gives me good support in measuring the losses in one of the half-bridge switches over one commutation period. The last time I ...
0
votes
2answers
823 views

3 phase induction motors with poles not equal to 3x

I am having trouble finding diagrams to show induction motors with poles not equal to 3x. Everything I find is 2 poles per phase. Can anyone explain and help me visualize, for example, a 4 pole 3 ...
1
vote
1answer
91 views

PWM or Variable Resistor [closed]

For a school project, I have to design and perform an experiment of my choice. I have chosen to test the efficiency of variable resistors and PWM circuits by testing the amount of energy wasted (heat ...
0
votes
1answer
76 views

Solar Motor Circuit Design

Trying to build a simple circuit to power a small pump while the sun is out. Here are the specifics: Solar Panel (60 cell mono panel) Open circuit voltage 36.4V DC, Short circuit current 7.96A. Pump ...
0
votes
1answer
56 views

BLDC Current Driver Encountering Current Problems

The attached Schematic uses 6 N Channel Power Mosfets "IRL3303". I have wound my inrunner bldc motor with 180 windings per phase using a 26 Gauge Magnetic Wire. My motor is a 6 pole 2 magnets machine. ...
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1answer
200 views

Using hard disk motor as generator

I have disassembled 20 broken hard disks and taken out the motors, thinking they might be useful. However, they didn't work using DC current, because they required some kind of control circuit. Now I ...
11
votes
2answers
3k views

Does a DC toy motor emit AC when you spin it?

I just watched a video on Facebook by somebody who built a project to run an LED using a 9 volt DC motor scrounged from a battery operated toy. They simply wired the LED to the motor and then used a ...
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2answers
131 views

The leads of my 3-phase motor are incorrectly labeled. How do I determine the correct labels?

I connected my new-in-box 3-phase motor to my new-in-box VFD, following the instructions in both manuals and the wiring diagram on the name plate (low voltage configuration). With the power off, ...
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votes
1answer
50 views

Experiment to determine the relation between applied voltage and angle of output shaft of a DC Servo motor?

My project need to control the position of a DC Servo motor, but I don't know the plant model of my motor. So, I want to make an experiment to acquire the data between the applied voltage and angle of ...