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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
299 views

How to efficiently charge 48V battery-motor system with solar panels

I'm wondering how to efficiently charge and use the following system with standard 18V solar panels: 48V lead-acid battery 1kW electric motor To charge the battery with either PWM or MPPT, the solar ...
0
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1answer
84 views

Is it possible to Speed control this AC Motor? [closed]

This is a 230V AC Motor. One Phase. Is there a way to lower its speed? I have tested using fan capacitors which didn’t work. I tried a triac phase cutting settup, but it seems dirty, noisy (humm) ...
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1answer
218 views

Where do I connect the negative and positive wires on this motor

Pulled a motor from a broken frother and accidently broke the connections and would like to turn it into a hand crank generator for fun Thanks here's a photo Apparently this is a rotor not a motor. ...
3
votes
3answers
205 views

Will a 3HP motor ever use less electricity (power) than a 1.5HP

You have two motors, one being 1.5HP and the other being 3HP. All other ratings are the same (e.g. motor efficiency ratings). You attach a load to each motor. The load on each motor is identical at ...
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2answers
111 views

Is there any way to brake a small stepper motor without passing any current through it?

For a project, I have two steppers connected to each other by a wire and I require the stepper to rotate in opposite directions, wrapping the wire around them, decreasing its length, or releasing ...
2
votes
1answer
145 views

How to decrease the speed of a DC motor?

After replacing the motor in a cassette player with a matching 6V DC motor, the minimum speed of the motor is too fast for desired playback speed (even when the internal potentiometer is at the ...
0
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1answer
152 views

Field Oriented Control Feed Forward Term

I implemented a Field Oriented Control (FOC) controller for a synchronous motor, which works already pretty good. Now the I-part of the PI controllers is necessary to achieve a good reference tracking,...
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0answers
39 views

Using two motor drivers to control a single stepper motor

For this project, I am running a single, small (6mm di.) stepper motor. I require the full power available from the first driver to provide enough torque to rotate the motor’s gear. The problem is ...
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2answers
103 views

Why am I seeing more inductive spikes from my motor at a higher duty cycle?

What is the mechanism that causes more inductive spikes with a higher duty cycle, even if the frequency of the pwm is held constant? Doesn't the motor create voltage kickback only when it is turned ...
0
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1answer
97 views

Inconsistency Issues With Stepper Motor

I am attempting to get my stepper motor to rotate 90 degrees, stop for a second, and repeat these steps. Please note I am a beginner, but I have taken physics courses so I do understand most basic ...
0
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2answers
106 views

What is the function of the dippers in a slip ring liquid starter?

The liquid starter is one that uses a washing soda solution and water in a tank. From what I've read, the dippers are attached to a shaft controlled by a small motor to lower the dippers into the ...
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0answers
108 views

Microcontroller freezing up when I connect a motor

The out pin is a PWM feeding into the npn transistor to control the speed of the motor. The motor is a small dc motor I found from a toy, and the transistor is the 2n2222. The microcontroller I'm ...
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0answers
49 views

4 wire 9v dc motor debuging

This is the DC motor of yamaha mt1x 4 track tape recorder. The motor is not working and i would like to know maybe if i can fix it. This motor turned for a while and then it totally stopped. I opened ...
0
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1answer
527 views

Can a Solid-State Relay Control AC Powered Fan Speed Via PWM

I'm working on a project where I'd like to control the speed of an AC powered box fan using a microcontroller. I am wondering if this can be accomplished by using a PWM output to control a solid-...
0
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0answers
84 views

LC filter stepper motor

can i use lc filter on three phase stepper motor (variable reluctance motor) to get sinewave current ? We know that if we put sinewave voltage on ststor windings, the stator current will not be ...
1
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0answers
70 views

AC/DC Motor Running in the wrong direction

So I have a floor buffer that has 115v AC motor on it. Recently the motor seems to be running in the wrong direction so that the driver flies off of it. I have replaced both rectifier bridges and the ...
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2answers
112 views

Amplifying AC Current for Stepper Motor

I'm having troubles with a 3D printer. I need to change a motor for a more powerful one. For doing so, I 'll have to add an external small circuit to amplify the current but not the voltage given by ...
0
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3answers
150 views

What's the minimum amount of transistors I need to operate a stepper motor?

I would like to know the minimum amount of transistors to operate a stepper motor.Could I pilote it with one transistor or I need one transistor for every coil? Thanks in advance! Edit: the minimum ...
2
votes
1answer
117 views

I don't understand the windings inside my power drill. [closed]

I was curious about how my power drill worked and I disassembled it. I understand the general principles at work here but I don't understand why the winding is set up this way. I assume running ...
9
votes
2answers
395 views

Why does my BLDC motor change behavior at high speed?

Background I've recorded torque vs speed performance of a small sub 50 gram hobby BLDC motor, the KDE 2304XF-2350. I power the motor at different fixed voltages to the ESC (electronic commutator) ...
0
votes
1answer
39 views

reluctance motor sinewave current

can i make switched reluctance motor with sinewave input voltage and sinewave current using series LC resonant filter (Inductor L and capacitor C in series resonance (for 50 Hz 0.1H and 100 micro ...
0
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1answer
52 views

Motor control signal resolution

I'm working on a project which requires the control of a motor via a +/-10v control signal (which will be fed into an amplifier). In theory any motor can be used, although it should be attached to a ...
1
vote
4answers
204 views

Induction Motor Torque Slip Characteristics

This question was asked in a interview for Scientist position. For a given T-slip characteristics of an induction motor, I want the same maximum torque but at a lower slip value? Is it even possible?...
0
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2answers
65 views

Where to get started in designing a 3 phase motor circuit [closed]

I am required to design a circuit that requires a 3 phase motor which can be spin at a range of desired speeds and times. I know this will require: A 3-phase motor An inverter to convert single ...
0
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3answers
255 views

Controlling motor speed with PID how to scale PWM to RPM and back

I want to control the speed of a motor using PID controller. My problem is, the valid PWM range I can set in my microcontroller is from 0 to 199 but I measure the speed of the motor (using an encoder) ...
0
votes
1answer
105 views

Making a blender built for 120V work on 220V

I have a Vita Prep 3 (Vitamix) which is built for 120V and I want to use it in Europe with 220V. I'd like to avoid a converter because of its size. There is a motor built for 220V available: Would ...
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0answers
156 views

Please help me critic my H-Bridge MOSFET motor driver circuit

This is the first time I build the H-Bridge MOSFETs driver circuit. Due to some limitation of desired components. It is all SMD, so I don't really have a proper way to test it before building the ...
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0answers
55 views

stepper motor power factor

can we set stepper motor (variable reluctance) motor to power factor 1(ideally) or close to 1 like 0.98-0.99 ? What are the most basic techniques ? Best regards!
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1answer
126 views

Compatible driver motor for JGA25-370

I'm new to electronics so i came here to ask some questions : 1) i have 4 motors JGA25-370 (6v, 58rpm) and 2 driver motors L298N ; If i put one drive to control 2 motors i will have max torque from ...
0
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1answer
94 views

How can I decrease the torque of a stepper motor?

I would like to take a powerful stepper motor, and sometimes weaken it, so it will stall when it hits resistance. I understand that I can reduce torque with microstepping, but it does not seem to be ...
0
votes
0answers
67 views

Three phase induction motor 3

For most common/casual 3 phase induction motor, If we connect proper capacitors in series or parallel, can we get resonance like LC circuit ? thank a lot. star or delta . doesnt matter.
0
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1answer
46 views

sinewave input input induction motor

If we put for standart 3 phase induction motor sinewave voltage input, will we get sinewave current if we measure motor current with osciloscope. At least sinewave like current ?
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0answers
32 views

Understanding generator wear and rotor electrical measurements

I have a generator that I am attempting to fix, and I am getting readings that are out of spec on the rotor brushes. Per some instructional videos I found, I should be measuring 5V AC on the rotor ...
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2answers
647 views

What happens when a motor is spun faster than its rated RPM from an external force?

I've seen plenty of questions wondering what happens when voltage is applied that would exceed the RPM rating, but what happens on the voltage/current side when something external - the wind spinning ...
1
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1answer
381 views

12 Volt vs a 24 Volt Motor

I have read that using a higher voltage motor would need less current to get the same power. I understand that P = IV and how that works. My question is if the 24 V motor would get half of the current,...
2
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2answers
122 views

Current waveform electric motor

Does electric motor reactance at given speed is constant according to rotor position (angle)? For switched reluctance it is not. But for three phase induction motor? Considering there is no any noise....
2
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2answers
554 views

Induction Motor Starting Problems

First off I'll start by saying that I have almost no experience of single phase induction motors but I do have a reasonable knowledge of electrical & electronic stuff. My neighbour asked me to ...
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1answer
130 views

How to test phone vibrator motor?

I have a phone vibrator motor that I want to check. This is what it looks like: And here is the schematic from the service manual: The motor is not connected to the circuit. It is by itself as seen ...
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4answers
141 views

Is there a motor designed to be constantly overloaded?

So I'm very, very new to electronics so this may be a really dumb question but here goes. Is there a motor that either a. is designed to be constantly overloaded or b. run in such a way that ...
1
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1answer
144 views

What causes horsepower and torque to remain the same in a dual speed (single winding) motor?

Below is an extract that I've found but don't fully understand... What actually causes the horsepower to be the same at both speed? And for the second scenario, what causes the torque to remain the ...
0
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2answers
315 views

Reversing Motor with 2 push button switches [closed]

i wanted to make a schematic to reverse the motor direction with 2 push buttons, and i failed every time to make a schematic like this, when someone can help me would it be helpful thanks.
0
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0answers
21 views

Computing “approximate” absorbed power for an AC motor of a pump from missing data

I have an year's worth of time series data for a pump: a lot of data are missing. I would like to estimate the trend of the absorbed power with time. I don't need to get an accurate estimate of power: ...
1
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1answer
114 views

Relay Circuit Interfere with RF signal - How to improve?

I am building a BLE Motor Controller Circuit and I have some problem with connection dropout when switching the relay. Here is the relay circuit This is the active high circuit. This is the relays ...
2
votes
1answer
134 views

I found a motor/generator thing at my school's storage. I was wondering if anyone could identify it

Im not sure what this is because it has both a commutator and a stator. It didnt have anything else with it. Im guessing it has something to do with ac generation.
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1answer
57 views

Measure the load on a servo very precisely?

I am trying to make a servo turn a dial. At certain points in the revolution, the dial will "stick" on certain points, where there is more resistance. I would like the servo to be able to very ...
0
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1answer
316 views

Earth leakage tripping with 3 phase motor [closed]

I'm working in elevator world, i'm now in a strange situation. The 3 Phase synchronous motor is connected by drive then main controller and a distribution board. The faulty earth leakage circuit ...
0
votes
0answers
33 views

I need help identifying a sop353 or sop665 6 pin package IC For a stepper motor circuit

So this is part number MP06122 from a Makerbot 5th gen Carriage Assembly from a 3D printer that drives a stepper motor and heat tip, its also coupled with an interface that reads a opti encoder that ...
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1answer
41 views

Induction motor construction

What will happen if rotor diameter is increased in an induction motor? How the torque changes ? How the performance will change? How the pf will change ? What will be the disadvantages? This was ...
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2answers
170 views

What is the connection of this synchronous motor?

so yeah I took this picture of the terminal box of the synchronous motor we're cleaning. I can't distinguish what is wye or delta when it's shown like this. what are the indications that a connection ...
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1answer
206 views

What is the purpose of these diodes in half bridge

I am checking out a schematic for a full bridge and I noticed these diodes at the gate of every mosfet and I do not understand their purpose there. Can someone elaborate please. The IC to the left ...