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Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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1answer
112 views

Where to place a diode - DC 12v motor controller [duplicate]

I'm building a controller for a DC motor. I'm using a 12V DC motor from windscreen wipers. Here is my circuit diagram and a video of the simulation I made. https://www.youtube.com/watch?v=...
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2answers
146 views

FOC speed limit motor?

I have here an FOC controller with encoder and a 2200kv, 40A, 324W motor. I can run the motor just fine and I limited the current to 4A and the motor spins up to around 1400rmp. When I now increase ...
2
votes
2answers
160 views

Is Axial Gap (pancake) motor better for servo drive applications?

I heard from someone that axial gap /pancake motors (lynch or etek) are better for servo control (speed and position) than standard radial flux DC motors. Both motors are brushed type. I don't ...
1
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0answers
40 views

Estimate the Flux Linkage of a PMSM Motor

I'm not sure if it is possible to estimate the flux linkage of a PMSM motor (star connection) by the controller itself, where I can measure the input voltage, all the phase currents and the velocity. ...
2
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1answer
122 views

What is the purpose of perpendicular “smaller” magnets in between the main magnets in a rotor of a motor? had never seen this before. Do they help?

I am trying to build my own generator at home for fun, I saw on a video in youtube https://www.youtube.com/watch?v=YsSm65DAcCg where the guy placed smaller magnets in between the main magnets of the ...
1
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0answers
35 views

Half Bridge motor braking

I have a motor that only runs in one direction. I currently use a fqp30n06L logic level MOSFET to control the motor. Once the MOSFET gate is grounded, the motor does stop but it freewheels. I also ...
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2answers
1k views

How does a generator not stop itself?

I'm having trouble reconciling my understanding of motors and generators. Let's examine a simple DC motor at rest. Applying a voltage (\$V_{applied}\$) to the terminals generates a large current and ...
0
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1answer
40 views

Solar cell failure

I am a student in high school, and I am working on a project. I got a Solarbotics Marble Machine, and I could not get the solar cell to transfer power to the motor. I talked to my Robotics teacher and ...
0
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1answer
35 views

Motor selection for high speed rotary actuation

I am trying to select a motor for a high-speed application where I need to rotate a load bearing cylindrical disc at 20,000 rpm. The total mass of the disc along with its load is approximately 1.5 - 2 ...
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2answers
108 views

H-bridge motor controller [closed]

I made a circuit but I am not sure it is going to work. The circuit is supposed to drive a 36 V 28.5 A motor. I am having trouble finding out if applying 5V to IRLZ44PBF would open it fully and allow ...
1
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3answers
67 views

Apart from speed, do VSD's also alter current?

As I know it, a VSD alters the frequency to change the speed of a motor. I also understand that since the back emf of the rotor is directly proportional to the speed of the rotor, the slower the motor ...
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1answer
269 views

Does the motor speed change with the fully automatic star(wye)/delta starter?

At no load, I connected a 380V motor to start in the star connection for 5 seconds and thereafter change to the delta connection. I understand that torque will change since the current will change as ...
0
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2answers
56 views

Closed current loop control without H-Bridge, PWM

I am trying to find a way how to control the Voice Coil Motor (VCM) or PMSM motor with a closed current loop without the use of an H-Bridge & PWM. Does anyone know how to make an analog closed ...
1
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2answers
89 views

Meggering Three Phase Motor (Phase-GND, Phase-Neutral, GND-Neutral)

When meggering a three phase motor, could someone please help me understand the values we would expect to see for a motor with no insulation or ground faults. From my understanding: Phase-GND: ...
0
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1answer
57 views

Can 3 phase AC current be applied to a BLDC and vise versa?

I am just wondering because the designs of a synchronous motor and BLDC are the same. Could you please explain the downsides of not using the designated current?
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1answer
131 views

What motor do i use to rotate a tumbler at low RPM and high torque which run by a battery charged by solar?

I am gonna run the motor to turn a tumbler of 50-85 kg @ 5 rpm MAX. The motor will be powered by a battery which will be charged by solar. So should i go for a DC or AC motor? Single phase or 3 ...
0
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2answers
137 views

Vending machine motor and switch circuit

I have a project using vending machine motors, arduino, pi etc. The motors have a NC microswitch that is OFF when motor spinning and ON when returning to the original / start point, to detect 1 full ...
0
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4answers
94 views

Is it possible to switch an electrical machine several times from motor to generator and vice-versa, within one revolution of its rotor?

I would like to find out how quickly and frequently a reversible electrical machine (EM) can be made to switch functions from a motor to generator and vice-versa - and what are the parameters of the ...
0
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1answer
39 views

DC motor power generation

Can any one tell me If we rotate a DC motor(1800w) in its full speed how much electric power(as a generator) it will generate?
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4answers
90 views

Very precise position motor recommendation [closed]

I've been searching for a suitable motor for my solar panel and I need two motors to rotate to two angle that is solar azimuth and altitude. Since it involved a very precise angle calculation and so I ...
1
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1answer
56 views

Logic Level Converter (3.3v <-> 5.0v) returning HIGH for Low Volt. & High Volt. sides when nothing is plugged in. [Raspberry Pi]

The Goal I have a Raspberry Pi that I'd like to control my treadmill with. The Pi's GPIO ports output 3.3v and the treadmill's motor control board only takes 5v signals. Because of that, I bought a ...
0
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1answer
45 views

Choosing a motor to lift window blinds [duplicate]

I'm looking to raise my blinds every morning using an rpi/Arduino and a motor. The blinds are lifted by a cord that loops near the bottom. I've checked that the cord requires about 20N force to pull ...
1
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1answer
110 views

Non excited synchronous motor

I was looking for a synchronous motor for my rotary spark gap. On this page I found what I need. http://www.tb3.com/tesla/sparkgaps/1800srsg/1800srsg.html But the motor model is not 100% same on the ...
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2answers
67 views

Linearization of motor's thrust

I'm working with a water vehicle that use four motors to move. They are placed at the corner and are fixed. Hence the movements are obtained changing the speed of each one. The vehicle can move along ...
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2answers
135 views

Can I power 4 DC motors with an AC/DC Adapter?

I have 4 24v DC motors that I would supply with a 24V 5A AC adapter I have 2 L289N motor driver board though so I wont be connecting them directly to the adapter. Question: Is it safe if I power the ...
3
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1answer
131 views

Why build very similar diesel-electric engines in both AC and DC traction versions?

I'm reading Wikipedia on GE Evolution Series diesel-electric engines. The series includes ES44AC and ES44DC models. Looks like they are very similar but one uses AC traction and another uses DC ...
0
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3answers
113 views

Recommendation for an inexpensive electric motor to drive a mechanical speedometer [closed]

I'm needing a small DC electric motor that could be used to drive a mechanical speedometer. This would be used for older cars that have been retrofitted with a newer engine or transmission that doesn'...
0
votes
1answer
68 views

Is it possible reduce the watt consumption of a 12 VDC radiator fan by using a motor controller?

This fan uses 80 watts and, since it is a car radiator fan, it blows alot of air. I need it to run all night on one car battery. It’s fine if it only blows a quarter of its full power, so I am trying ...
0
votes
1answer
90 views

Controlling an Array of Motors

I am trying to measure the state of a switch on a vending machine motor (model # BC-D27/28). It has a micro switch on it that has a lead going from COM1 to NC2 when engaged and COM1 to NO3 when ...
0
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2answers
68 views

Engineering approach to choosing a motor, voltage and gears

I am working on a project to automate the opening and closing of my venetian blinds at home, by attaching a motor with an H-bridge to them. I started with a practical trial and error approach to it. ...
0
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2answers
112 views

Cascaded current control

I have a actuator capable of measuring motor current and position via an encoder on the output shaft. The motor is a brushed DC motor running through a gearbox. My questions is in regards to the use ...
1
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1answer
102 views

best choice of a stepper motor to lift a 3kg load [closed]

first time working with a motor.am designing an egg incubator and need a stepper motor to tilt the egg tray at 45 degree occasionally.there are two egg trays each is attached to the incubator wall and ...
3
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1answer
1k views

Motor current consumption and power do not match

I am working on a design and need to calculate the energy consumption of this motor: https://www.maxonmotor.com/medias/sys_master/root/8825428410398/17-EN-256.pdf. (Part No. 339252) The ...
0
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1answer
326 views

Wiring washing machine motor

first apologize for wrong wording/idioms. Found an old washing machine motor. It has six terminals, labeled U, V, W, Z, X, Y Attached to the motor is a capacitor with two terminals, no more wires ...
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4answers
717 views

Using a BLDC motor for regenerative braking

I am planning on using a BLDC motor to drive a small go-kart like vehicle. I would like to implement regenerative braking, but am having trouble finding certain details. My main concern is being able ...
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2answers
221 views

Is this a ac three phase motor with a dynamic braking control?

I am an electrical apprentice and this question popped up on my exam, and then again on an exam under a different topic, and I have to review it. What type of motor control is this? note: I ...
2
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0answers
46 views

Is there an metric equivalent to the NEMA step motor frame sizes?

I just took the axis motors of my EMCO F1P CNC mill and measured them to figure out which frame size they have. The square flange is exactly 60 x 60 mm, and the ...
0
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1answer
37 views

How to determine the right trip point of thermal cutoff for 1/4 hp 3A 115V single phase ac motor

The Thermal fuse blew in my Ryobi DP102L drill press motor, while I was drum sanding. There were no markings on the fuse. The single phase induction motor is 1/4hp 3A (no load) 1750rpm on 115V AC, ...
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2answers
60 views

Stepper Motor Startup Time?

I've been using a 28BYJ-48 5V stepper motor in a little project for a pan-tilt camera system, where the stepper is the pan motor. I'm powering it with 6 AAA NiMH batteries in series so it's about ~7.5-...
0
votes
1answer
55 views

how to minimize output resistance

I want to setting up a micro coreless motor (5*20 size) for quadcopter. I use BD139 transistor, PWM from STM32 (31kHz PWM frequency) and 500mA li-polymer battery for this work, but the maximum speed ...
1
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2answers
151 views

Can every voltage source accept fly-back diode's current?

A diode is used parallel to the motor (or inductive load) in order to prevent damage to the switch because of back-emf voltage. Now, that back-emf voltage actually produces a current and by using a ...
0
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2answers
91 views

How is the shaft of a motor fixed in its position?

Consider for example a brushed DC motor. 1- Is the shaft of the motor (which is rotor in this case), actually floating mid-air because of magnetic field of stator? Why doesn't it fall down due to ...
2
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2answers
338 views

Ceiling Fan Speed Control stripped down

I am a novice but know enough to get by. I was given an older Hunter Fan that is only operated via Remote. I have cut the receiver out because I do not have the remote and from what I have read they ...
0
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2answers
212 views

STM32F103 blue pill overcurrent (possibly from motor)

I have an application that includes a dc motor and a dc generator. I am using stm32f103 blue pill. I am controlling the speed of the dc motor by measuring the voltage and changing the PWM duty cycle ...
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1answer
50 views

Individual current limits for each of 3 lanes [closed]

I want to be able to limit the current going through each of 3 channels, for a reaction wheel driver. Each lane should be rated for the maximum current draw of each motor, and the real feature: If one ...
0
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0answers
28 views

Best Hardware Approach to Play With multiple Buttons, Switches, steppers, Servos on Arduino

I would like to control the movements and positions of different actuators (steppers, DC motors, servos...), by either controlling some with potentiometers and / or getting them to move to preset ...
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1answer
173 views

Cheapest/quickest way to power 2 x 12v fans from 24v baseboard fan socket?

I have an APC baseboard that runs off 24v. The two fans (2 x 24v @ 0.16A = 7.7W) were a noisy and power-hungry problem. I've got a couple of Noctua fans of the same size, with "almost the same" or "...
0
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0answers
39 views

Using internal pulldown to pull esp8266 logic pin low

I'm trying to design a linear actuator with limit switches that both deactivate the motor drive and also signal my micro-controller that the switch is active. I plan on using a DRV8871 motor ...
2
votes
1answer
584 views

how does ceiling fan remote implement reverse function?

Most ceiling fans come with a remote control transmitter/receiver pair. The transmitter is hand-held or wall-mounted, and the receiver is installed in the ceiling box. Input to the receiver is a 2-...
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0answers
18 views

Parameters pmsm

I work on a vehicle system. I use an electric motor block that has the following data. Maximum power [kW] = 85. maximum torque (N.m) = 280. maximum speed [rpm] = 3800. my question is : How to ...