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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.

260 questions with no upvoted or accepted answers
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6
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2answers
1k views

Designing/Predicting Output from Permanent Magnet Motorcycle Stators

I'm hoping you can help me. I've long been into motorcycles, and have restored and customized many different bikes. While building custom motorcycles, I often add electrical accessories, and use high ...
4
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0answers
115 views

Modeling scalar control of PMSM

I have met with a scalar control algorithm for a permanent magnet synchronous motor. I haven´t heard about it before so I decided to develop a dynamic model to further analyze this control algorithm. ...
4
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2answers
555 views

Using a PNP transistor as a switch connected from a 74154 then out to stepper motors

I am currently working on a project that involves an arduino mega 2560, one 74154 demux and 16 stepper motors. I want to be able to control which stepper motor turns at a given time. For this, the ...
2
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1answer
62 views

Help needed to select proper electric motor for constant drive

I need about 180 degree movement, back and forth in about one second. Maximum torque is about 2.2 kg ⋅ cm. I have tried RC-servos (up to 20 kg ⋅ cm), but they all burn within first 12h (maximum drive ...
2
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0answers
52 views

What kind of monophasic induction motor is this?

About 15 Years ago I bought an induction motor from a junk yard. It have 6 leads being that 2 are the same lead, so 5. The guy who sold me had no idea from what machine it came. And I don't quite ...
2
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0answers
76 views

BLDC bemf shape

I am trying to detect the zero crossing point of the BEMF voltage in order to control the motor sensorless. The following picture shows the ideal shape of BEMF and in many application notes or ...
2
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1answer
231 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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0answers
92 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 ...
2
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2answers
598 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 ...
2
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1answer
2k views

Single Phase Induction Motor Wiring help

I have purchased a Single Phase Induction Motor that runs anti-clockwise, I require it to run clockwise however I am unable to figure how to change the wiring to do this, any help would be appreciated....
2
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2answers
106 views

Controlling 12V 12A DC Pump using PIC

For part of my project for college I have co control a 12V DC pump which requires 12A. I was wondering what is the best solution for allowing the PIC to complete this as the output from the PIC is ...
2
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0answers
134 views

DC motor speed control

I am trying to control the speed of motor using ADC value received using ATMega16, the system works well with 12V. But when I go for 24V the motor runs continuously, even when ADC value is 0. I have ...
2
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0answers
139 views

what are “C” rings for on motors?

what is the point of this "C" shaped metal 'clip'? (circled in yellow)
2
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1answer
232 views

Tuning PID coefficients for stationary stability of brushless DC motors

I'm using a commercial off-the-shelf brushless DC motor controller. It combines a PID controller and an absolute encoder to regulate position. When my motor reaches its target state, it generates a ...
2
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0answers
217 views

Differential cascading of two equal pole Induction motors?

I was working on speed control of Induction motors through cascading. Theoretically, in differential cascading of two motors, the speed is given by $$\frac{120f}{P_1-P_2}$$ where \$P_1\$ and \$P_2\$ ...
2
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0answers
298 views

Ceramic capacitor in High voltage DC link

In motor drive application the high voltage dc link between the rectifier and the inverter usually have: a bank of aluminium electrolytic capacitor a film capacitor near the inverter Is there a ...
2
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0answers
969 views

How to drive electric power steering motor

I want to drive an electric power steering motor from an European Opel Corsa C in a way that I can control the steering of the car programmatically. I have a steering angle sensor which I will to use ...
2
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0answers
1k views

In field controlled dc motor, why does the armature current remain unchanged even if it is affected by field flux?

Basically in a field controlled dc motor, the armature current is kept constant (via some constant voltage source) while the field current is varied which will vary the field flux and interacts with ...
2
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0answers
2k views

Monster moto shield + Arduino +Pololu 12V, 29:1 Gear Motor Encoder hardware problem

Overflow enthusiasts! I am trying to build a balancing robot with two wheels, using the polulu gear motor as mentioned above. In order to have a strong motor driver,the monster moto shield is used in ...
2
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0answers
420 views

Draw relation of rotation speed and output power of PMAC generator with brake resistor

I would like to draw a graph showing the relationship between rotation speed and power of an ideal Sinus PMAC generator with a brake resistor R(load) to be defined controlled via a 4Q Controller ...
2
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0answers
413 views

Controlling a treadmill motor

I'm recycling some spare parts of an old treadmill for a new project. I have the motor with its driver board, the elevator piston and the controller board. All works out of the box, but I need to ...
2
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0answers
200 views

Gear motor with encoder: minimum drivable step

I am fancying this motor http://www.pololu.com/catalog/product/2271/specs to motorize an X-Y stage. (Alternative High rpm motors with high reduction ratio and high encoder counts/rev are welcome ;) ...
2
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0answers
72 views

Why do my outputs look exactly the same for the Allegro 3901?

I am trying to capture results shown in Figure 8 of Allegro 3901 data sheet . My circuit looks like this: The channels above coresspond to the oscilloscope screen captures below: In the image ...
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0answers
40 views

Tradeoffs between brushed, brushless and induction motors

What are the tradeoffs associated with adopting brush-less, brushed and induction motors for designs? More specifically, if the goal is to design a servo, for example, how does the control circuitry ...
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0answers
38 views

Strange behavior from single phase BLDC

I've recently been working on a pump that contains an impeller controlled by a simple brushless motor driver. The driver is very similar to one for a 12v fan which makes sense as the pump is part of a ...
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0answers
39 views

Nonlinear Observer Question for BLDC

I'm looking at the article posted here, and I'm trying to figure out what it is that they're controlling and how. Specifically, Dave Wilson from TI gave a presentation called "Teaching Old Motors New ...
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0answers
112 views

Why are all my motors and transformers failing at this specific location?

At my job there is a vacuum oven. There is a 50 hp, enclosed cooling fan. that circulates N2 gas upon quench, the design of the unit runs 480 volts through a reduction transformer to 230 volts. This ...
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0answers
96 views

ATMega328P control servo motor speed with potentiometer

I'm trying to develop an application in atmel studio 7.0 which will allow me to control the speed of my servo motor with my potentiometer. Now, the problem is that I don't really know how to do that? ...
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2answers
122 views

How to accurately measure electric motor torque?

I'm currently doing an experiment on an AC motor to measure the torque output from a servo drive using fishing line wrapped around the servo shaft / gear while the other end is connected to a luggage ...
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0answers
37 views

How to choose a DC-DC Converter for a motor with inrush current? (Theory)

I am wondering how to choose a DC-DC converter for a motor. This is a theoretical question for understanding. For example, if I have a converter that can output 5V with a maximum current of 1A. ...
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0answers
72 views

Why does a motor not work after the power supply?

I have a fairly cheap breadboard power supply and a motor. Now if I touch the wires from the adaptor (the thing that plugs into the power supply to provide it with electricity) the motor works fine ...
1
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2answers
66 views

Stepper motor controlled by turning only in one direction and stalling in opposite direction

I am controlling a high-torque stepper motor (23Y204S from Anaheim Automation with 8 lead-wire) using a microstepping driver (MBC15081) and Arduino. The winding wiring is connected as bipolar series ...
1
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0answers
74 views

DC permanent magnetic motor control issues

We have a 180 V dc permanent magnet motor. When engaging the control board while the motor is hooked up. The output to motor drops out and reads no voltage. If I take the motor leads off the ...
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0answers
122 views

About how to extract back EMF from SMO(sliding mode observer), maybe I need a doctor for this question

The equations of PMSM on alpha-beta frame(2 fixed coordinate systems) are like this, ...
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0answers
52 views

Air conditioner fan not starting

I have a problem with my air conditioner fan not starting. As seen from the schematic below, when I test for voltage between the brown and black wires, I get 0 V (this is the problem). The indoor unit ...
1
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1answer
290 views

Synchronous motor high starting current

I have Danaher Motion SS451 (120V, 60 Hz, Single Phase, 72 RM, page 10 in manual below) synchronous motor that was consistently blowing a 3 amp fuse. I replaced it with 5 amp slow-blow fuse and ...
1
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0answers
90 views

SVPWM for BLDC Motors: Switching Losses vs Neutral Point Voltage Swing/fluctuation

I am implementing a SVPWM (Space Vector Pulse Width Modulation) scheme for a 3-phase inverter (3 H-bridges, nothing fancy) to control a BLDC Motor. Since one can choose which zero vectors (000 or 111)...
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0answers
57 views

PMSM dynamic model

I have been working on a dynamic model of the PMSM with surface mounted magnets and sinusoidal stator winding. I am little bit confused by formulas for the \$L_d\$ and \$L_q\$ inductances. I have ...
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0answers
61 views

Modelling a Braking DC Motor Speed Controller

I'm trying to simulate a brushed DC motor. The model comes from the following circuit diagram KVL yields: $$v = Ri + L \frac{di}{dt} + K_b \omega_m$$ My rudimentary understanding of speed ...
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0answers
252 views

Three phase motor driver DC link, DC bus capacitor values

I am designing a motor driver for a three phase brushless motor and have been looking for a capacitor value for the DC bus of this circuit (C1). Most of what I have found when researching deals with ...
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0answers
340 views

How to increase the speed of a specific AC motor

Here are details of this project: The motor being used is a 2 phase Slo-Syn model SS400 (1/4 HP). The motor has two 120V windings that are physically 90 degrees to one another. It is operated by ...
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0answers
34 views

How can I get/calculate simulink bldc parameters

I tried to get the parameters for a bldc simulation https://de.mathworks.com/help/physmod/sps/ref/brushlessdcmotor.html I tried to find a similar motor to the I need (500 W, 20-25 Nm, geared bldc) ...
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0answers
34 views

how to choose/design a capacitor value for surge current(for protection) for DC brush motor?

I am driving a DC BRUSH Motor at 30.V.D.C and the current is 300 Millie ampere, it is powered by L.M.317 I.C .My sir is suggesting to provide a capacitor as a protection form surge/peak current ...
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0answers
268 views

Noise in BLDC motor with 32kHz PWM

I built a controller with FOC for BLDC motors and it works well for most motors I tested so far, but as it comes to motors with low resistance and inductance, I hear a noise, that sounds like water in ...
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0answers
64 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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0answers
90 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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0answers
69 views

Control servo with 4 wires with Blynk

im a beginner in coding and I was wondering if I could control an old servo using the Blynk app. I want to control the direction, so it can unroll the screen up and down. We opened the servo to look ...
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0answers
161 views

My BLDC motor is stuttering and I have no idea why

I'm driving 2 BLDC motors with two ESCs, the motors and the ESCs are powered by an external LiPo battery and the Arduino is powered via usb. The motors work with pulses between 1000 and 2000 ...
1
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2answers
1k views

How is a higher torque achieved in a single phase cap-start cap-run motor?

The starting winding come capacitor circuit is there for starting the motor. When the motor reaches 80% rated speed, the centrifugal switch cuts the starting circuit out and leaves the run winding ...
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0answers
268 views

Capacitor to reduce initial voltage drop when starting winch?

I have a solar panel charge controller with a load terminal that disconnects when the battery (12V car battery) goes below a certain voltage (9V). I have connected a winch which draws a maximum of 15A ...