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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
37 views

What is the maximum torque and at what rpm a 250W, 36V BLDC motor can produce [on hold]

I am an EV enthusiast, I am working on designing a BLDC motor. My motor is a mid driven inrunner BLDC motor. The thing that is troubling me is torque, I need to design my motor in such a way that I ...
1
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2answers
41 views

Is there an economical 2-3 RPM 120v motor with speed control? Or what components could I use to achieve that scenario?

I've got a mechanical design for a piece of catering equipment and I need to figure out a way to achieve some variable speed control for a slow RPM motor. This is a direct drive application (imagine ...
0
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1answer
174 views

100kHz PWM Motor driver PCB/cable consideations

I am designing a board to drive a DC micromotor which requires a 100kHz PWM signal. The board is mainly a digital design board, with very little analog signalling. I am planning on driving the motor ...
1
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0answers
51 views

What are the ways to automate work of an electric motor? [on hold]

I need to develop a system which can make an electric motor to run for 3 second and run reverse for another 3 second and do this cycle for continuously and automatically for days. The motor should be ...
1
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3answers
132 views

How to make a conveyor (electric part)

I am going to make a conveyor like this There will be a optic sensor which detects a box. There will be motor (3 phase, 380 V, 1 A, 0.37 kW, 1400 rpm) with gear reduction (coefficient of reduction ...
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2answers
48 views

Motor performance

If I was to run an electric motor rated at 24V 20A at 15V 10A and at 10V 15A what would the difference in performance be? Assuming everything is rated to safely handle more than that power.
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0answers
27 views

DRV8835 - Outputs not working? [on hold]

We chose DRV8835 for driving DC motors for one of our applications. We are using the N20 motors presently on both the output ports A and B. ( Here is the link to actual motor used : https://robu.in/...
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1answer
300 views

120v Electric Motor Wiring

I have an old Westinghouse motor with a missing wiring diagram. It runs but is slow to start and sometime needs help. The terminal block has four connections, two labeled as line. I've measured ...
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0answers
49 views

Volt knob with consistent current

I need a device that can maintain the current of an variable electrical signal while manipulating current and overall power. Example 10a 0-24v 0-240w. And the theory behind a device which will work ...
0
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0answers
22 views

why induction motor torque oscillating?

why when start induction motor the torque oscillate before become constant, like the following matlab torque simulation graph .
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4answers
48k views

Relationship between frequency and current

Hello I have a simple question, I was reading in my Airplane Maintence book that in AC motors are frequency sensitive (I understand that) frequency changes can cause speed changes of the armature. ...
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0answers
33 views

high power servo motor for an automotive enviroment

As you know already most high power servo motors in the range of 1.5Kw to 3KW and their respective drivers are AC powered and come mostly in 3phase for reasons beyond the scope of the question. But ...
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2answers
47 views

SVPWM: Does setting modulation index to 0 still consumes power?

I've implemeneted a 3rd harmonic injection SVPWM (Space Vector PWM) scheme and it performs quite well. One peculiarity i have noticed was, when i set the modulation index to 0, the motor stops as ...
2
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1answer
1k views

How does the power usage and voltage of a universal motor change when running on DC?

I have a 2400w universal motor from an AC powered garden blower (230V @50Hz here in Australia) and am wondering what voltage and power requirements it would require from a DC source to give roughly ...
0
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0answers
20 views

FG servo motor speed issues

I have been trying to get a 40-year-old turntable back to life, with relative success until now. Everything works fine but for an intermittent issue with the motor. The motor has two modes (for 33 1/...
1
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0answers
68 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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3answers
273 views

Do EVs with a DC motor require an inverter and/or/nor a converter between the battery?

I'm somewhat familiar with Tesla's electric vehicles and that they use AC motors, but I'm completely unfamiliar with EVs that use DC motors. I know that in a Tesla an inverter is required to convert ...
2
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1answer
213 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 ...
1
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1answer
416 views

How to properly shield a < 5v Circuit from EMI from a 220v motor?

I've designed the following circuit: It may be trivial to most people but I did not know that the EMI generated by the motor and coil would interfere with my circuit. After some research I stumbled ...
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0answers
59 views

Where does the term 'plugging' (reversing current on dc motor for braking) come from? [closed]

The title says it all... I understand what the term means - but am curious as to how the terminology came about?
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2answers
42 views

do the voltage and amperage applied to a motor matter as long as the wattage stays at what its rated for?

I have an electric 180w motor from an electric go cart which currently runs on lead acid batteries but I want to convert it to have a 18650 battery pack for a power supply but I cant find the rated ...
2
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1answer
126 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. ...
10
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3answers
8k views

Voltage spikes when driving DC motor with N-channel MOSFET

I'm trying to drive a DC motor (12V, 100W) with MOSFET IRFP054N. PWM frequency is 25 kHz. Here's the schematic: I know DSEI120-12A is not the best diode for this but I don't have any better right now....
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2answers
262 views

Powering a 5v raspberry pi, a 12v motor and a 24v motor using 2 batteries charged with a solar panel

I want to control a 250W 24v motor, as well as a 12v 1W motor using a raspberry pi. It needs to all be powered by 2 lead acid batteries which are being charged when not in use. My plan is to use two ...
14
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3answers
3k views

Why is it harder to turn a motor/generator with shorted terminals?

The shaft of an unconnected motor is easy to rotate relative to a motor with shorted terminals. If a resistive load is connected to the terminals, the turning difficulty is somewhere in between. Why ...
0
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1answer
48 views

Converting a 9.6V NiCad Drill to Li-on

I am trying to convert my 9.6V NiCad drill to run off a 12V Li-on battery. When I connect the Li-On directly, the motor only just slightly spins and stops. The only way I can get it to work is using a ...
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0answers
35 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 ...
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2answers
3k views

how to find armature current in dc shunt motor in given question?

A 8.8 kW, 220 V, 1200 rpm dc shunt motor has armature resistance of 0.1 Ω and field resistance of 100 Ω. The rotational loss is 2200 W. Compute: a) The rated load torque on the shaft. b) The ...
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2answers
209 views

Controlling a stepper motor with a motordriver and Arduino

I'm trying to controll a Nema 34 stepper with a motrordriver(EM-314) and Arduino Uno. I have gotten the motor to rotate(slowly) by setting pin 5 on the Arduino to high. Pin 5 is connected to Preset 4 ...
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0answers
21 views

BEMF and zero crossing point detection

I am trying to control a BLDC motor without sensors using BEMF method and zero crossing detection. I managed to detect the zero crossing point but I am not sure if it is correct. I read that the hall ...
2
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2answers
70 views

Help Identifying what this component is

A friend of mine asked me if I could identify a component that keeps causing the flow of current to stop in a 12 V 1 motor system he has increased to 2 motors (perhaps due to overload or heat). He ...
0
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1answer
31 views

Shunt DC motor controller improvement

A 1.4 A shunt DC motor, with brushes, in a home made pottery wheel from 1970s runs slightly erratically. In general I am well impressed with it as the motor choice is appropriate for the ...
9
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4answers
642 views

Precise motor positioning

I am trying to make a device that uses several motors all with an arrow fixed on top that has 8 fixed positions (N,NE,E,SE,S,SW,W,NW). I am trying to avoid servos and steppers because of the price, so ...
7
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4answers
7k views

Brushless motor specs to maximize stall torque

I'm interested in a brushless motor having a high stall torque (not much in RPM). What specifications of a BL motor would give a fair indication of its stall torque, provided that voltage is fixed ( ...
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2answers
54 views

My hybrid motor starter keeps tripping

I have this exact motor starter on my AC braking motor (FLA 3.5A). The starting current is 12.1 A however and keeps tripping the relay after approximately ten minutes of use. The motor operates by ...
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2answers
86 views

Making a motor turn a certain amount by a button [closed]

I'm new here, so sorry for any inconvenience/misunderstanding. I want to have 4 motors that will all turn 90 degrees forward then stop on a button. Then when the same or different button is pressed, ...
0
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1answer
390 views

Bldc esc circuit drawing high current on one side

Hi stackexchange community, We are trying to drive a bldc motor which we dont know any information about. I have previously asked a question about getting more info since we dont have any datasheet. ...
0
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1answer
96 views

Is insulated copper wire required?

I am making a motor and was wondering if it is necessary to use insulated copper wire instead of any regular copper wire.
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1answer
979 views

How to determine a Permanent Magnet Synchronous Motor (PMSM) Nameplate?

I have already built a three-phase Permanent Magnet Synchronous Motor(PMSM) and wanted to use a VFD in sensorless vector control mode to run it. Now I want to figure out the characteristics of my ...
0
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2answers
60 views

Powering 5 fans with a LTC 3780 : should I protect it against induction effect?

I want to power 5 fans in parallel (12V 0.80A, each) using a adjustable power supply (DIY, made with an LTC 3780 connected to a 24V 15A PSU and mini Voltmetre). I read that a fan could destroy the ...
0
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4answers
110 views

Does this type of Dual Voltage AC Drive exist?

The goal is to run a 3ph AC motor with either high or low voltage inputs. The motor would be wired for a specified voltage and the controller drives a single output regardless of the line voltage. I ...
0
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0answers
69 views

Will this H bridge work?

I designed this H bridge circuit. Will send the PCB for manufacturing soon, but just wanted to make sure I'm not doing a silly mistake. I want to drive the FETs at 15 kHz frequency. Given the current ...
0
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1answer
73 views

Will 126v damage a small motor rated for 120v?

I have 252v coming into my building (126 per leg) and a piece of equipment which uses a percentage timer that has a small motor on it which is rated for 120v. Will 126v fry the motor?
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0answers
26 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 ...
1
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2answers
774 views

Help troubleshooting single phase motor

I have a single phase 230 volt motor. I am getting 230 volts (115 at each terminal marked with the red line in the image below). The motor is not drawing any amperage at all and is making no noise ...
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2answers
58 views

How can I get this 12v motor to run smoothly, and is it set up safely?

This is my first attempt at electrical engineering, so I'm sorry if this question seems basic, I couldn't seem to find answers anywhere. I want to wire a 12v motor to an on/off switch and power with ...
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0answers
48 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 ...
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....
0
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1answer
33 views

Using arduino and transistor for motor control

I am currently a computer engineering student trying to build a simple circuit to vary voltage by using a transistor and a arudino uno. The motor draws between 12v and 28v with a current of about ...
3
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3answers
98 views

How to make a motor capable of resisting physical movement?

Is it possible to make a motor capable of resisting physical movement? For example, at the gym you control the resistance to movement by putting more load, more weight. Is there a way to control that ...