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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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79 views

Will switching a LED on and off at a said frequency reduce or increase heat loss?

In my case, a 50W 34V LED is being used to light a small box. To reduce heat generated by the LED, we are switching it on and off at 50Hz. But I was wondering will this actually help? In the case of ...
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3answers
2k views

Confusion with the nameplate of an induction motor

Regarding the below nameplate of an induction motor: What is meant by?: Δ/Y 220/380 Does that mean if delta connected the line to line voltage must be 220V? Im confused also because isnt 220 ...
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1answer
72 views

Driving a motor backwards and forwards using mosfet and Arduino pin safety

So I want to drive a motor from a handheld drill/screwdriver. And I have managed to get it going using the first schematics, and using pwm to control the speed. The Zener diode is there to protect ...
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0answers
21 views

Uncertainty in current values of Power HD digital servo motor

In a project, we want to lift the load of 5 kg on the ground to half a meter. For this purpose, we use a 360-degree rotating PowerHD digital servo motor with a stall torque of 20 kg / cm. Motor ...
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0answers
82 views

Converting 0-5V PWM to 0-10V PWM using Arduino and Mosfet not working

I am trying to convert 0-5V PWM coming from an Arduino to 0-10V PWM to run a motor which has PWM line that operate for 0-10V. But as soon as I connect the PWM line to mosfet it either shows only ...
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1answer
43 views

Where does an IN5408 diode go in a hobby motor, on/off switch and AA battery holder setup?

I was told I need to add an IN5408 diode in the following setup but I am unsure where it goes. 2xAA battery pack Positive to On/Off Switch (simple open close circuit switch) To small hobby motor ...
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0answers
124 views

I have designed and 3D printed a new motor that was based on a video i saw earlier, however motor keeps stuttering and wont turn, what went wrong?

Figure 1 Figure2 I started by doing 150 turns on each coil making sure they were winded in the same direction, then connected the starting point of each coil together and took each phase winding to ...
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2answers
89 views

Relationship Between Number of Coil Turns in DC Motor and the Efficiency of Energy Retrieval From Regenerative Braking

When learning about regenerative braking, I began to ponder as to what the relationship between the number of turns in the coil of a DC motor is to the efficiency of kinetic energy retrieval from the ...
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0answers
26 views

PMSM motor current calculated by D axis and Q axis current

Now, I know d and q axis current can be calculated by phase current ia, ib, ic in a PMSM, via clarke transform and park transform. ialpha = sqrt(2/3) * (ia - ib / 2 - ic / 2) ibeta = sqrt(1/2) * (ib ...
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0answers
113 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
50 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 ...
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4answers
4k views

Why does magnet wire need to be insulated?

What is it about having multiple coils that enables the magnetic field? Why can't I just have one big wire or threaded wire on a motor? Sorry, it's kind of a baby question but I couldn't find the ...
0
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1answer
50 views

Swapping 24v dc motor with 240 ac motor [closed]

I have bought a 46ft power boat and it has a bow thruster installed, however the 24v motor has been removed and all of the other parts are missing, that is wiring , relays , control buttons etc. The ...
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2answers
47 views

Batteries not supplying enough voltage in DC motor circuit

I'm building a MOSFET controlled DC motor circuit with a 6V battery as the supply. Although when I turn the MOSFET on, the voltage at the battery positive drops to about 2.5V. I thought it could be ...
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0answers
40 views

Can I use regular motors with a stepper motor driver?

So I am doing a project for school that involves making a sort of car-thing with a Raspberry Pi, getting the idea from projects.raspberrypi.org. I wasn't able to order the suggested pieces online, so ...
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2answers
33 views

Motor controlled with a solid state relay not starting

We have a solid state relay controlled by a Raspberry Pi, The relay is interposed o the negative wire between a 11-12V battery and a motor. If I measure the voltage before entering the relay, it is ...
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2answers
49 views

Frequency of AC for electronic devices

I was wondering why using different AC frequency makes some devises not working. I found that I do not need to adjust frequency for using electric heat or electromagnetic wave such as ・rice cooker ・...
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3answers
78 views

Rounding up or down with Motor Overcurrent Protection

When sizing motor over-current protection, CSA 22.1 28-200 3a states that a circuit breaker can be sized up to 250% of the rated full load amperage (FLA) of the motor. E.g. 100hp, 575VAC motor ...
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0answers
60 views

Microcontroller resets with motor driver (L293D)

I am making a simple robot with 2 BO motors driven by L293D on ATmega328P (took out from Arduino Uno). The robot when tested on Uno works fine. But when I put it on the board that I have designed (as ...
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0answers
35 views

BLDC hoverboard motor with no specifications

I have this kind of motor but I can not find any electrical specifications about it. All I know is that is a 36V,250W BLDC motor. How can I determine the number of poles, the coil resistance/...
3
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1answer
94 views

Resistors parallel with motor?

A pcb we've been asked to look at has two 15k 1W resistors in parallel with a 15A AC motor. Silly as it sounds, we're a little stumped why they're there. It's probably bloomin' obvious, but we can't ...
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1answer
51 views

Calculating H-Bridge without motor specifications [closed]

I am currently calculating elements for an H-Bridge for brushed dc motor and PWM speed control that operates on 6V and maximum current of 2A. However I want it to work with different 6V brushed DC ...
0
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1answer
47 views

3.3v led and 220v water pump

I have relay connected to raspberry pi that switches the water pump on and off. I would like to add a toggle switch before the relay with a led. When the switch is turned on the led lights up and then ...
0
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0answers
29 views

10A 5v Relay control Submersible (Water motor)

Is it possible to control Submersible (Water motor) with 5v 10A relay. Here is the details of the Submersible water motor. My mains voltage is 225V to 250V If this won't work then what relay should ...
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0answers
28 views

Shorting the output of both the channels of L298N

Suppose I started with a project requiring the control of motors and ended with using L298N in my project, realizing that my motor only takes around 1.5A when on load. Now, with time I realized that ...
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2answers
55 views

AC motor design

Is it possible to have an AC motor with only a partial stator, one that does not fully encompass the rotor? Refer to the picture to understand what I mean. This would be needed to drive a spherical ...
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2answers
336 views

Best most efficient motor type to be used as a DC generator

I'm trying to design a system that requires a very light weight very efficient generator to be used from converting rotational motion into DC voltage(for say charging batteries) As far as I know BLDC'...
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1answer
32 views

Motor Run Capacitor Optimal Size

My understanding of motor run capacitors is that there is an optimal value for a paticular motor and that if it is not matched exactly, the magnetic field will vary and cause the motor to run poorly. ...
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2answers
143 views

What does 9 V mean in 9 V motor?

Does it mean that you need 9 V to make the motor start, or is this the max voltage before it is damaged?
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1answer
60 views

Motor/MOSFET Does NOT React To Input On Breadboard

So I have tried so many different variations on breadboard of this circuit but the motor seems to just be powered by the power rail on breadboard. It does not react to any change in the input and ...
2
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2answers
65 views

Sizing a motor for a conveyor

There is a plethora of information on motor sizing on the internet discussing the rated voltage, current, torque and power of the motor, and how these parameters should be selected based on the load ...
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5answers
139 views

15% drop in motor RPM when using PWM controller

I'm new to the forum and a total noob to electrical engineering. I have a 120W, 24V DC gear motor. Runs at ~200 RPM no load connected straight to a 24V power supply. However, when I connect it to ...
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2answers
48 views

Is it appropriate to use the TB6621 or DRV8871 motor driver for powering 12V 1 amp motors?

I'm looking to make an Arduino powered rock crawler with 4 motors (want independent control of each wheel, also need to reverse). I'm looking into buying 12V DC motors that seem to have about a 1A ...
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1answer
81 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 ...
0
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1answer
63 views

Mechanical to electric to mechanical… Power loss to expect

I have a 3hp lawnmower engine. My engine hypothetical rpm range from 3k to 6k. If I was to connect it to a generator or motor with similar power rating at similar top rpm, lets say a 2000 watts ...
0
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1answer
45 views

Igus Motor Power Supply [closed]

For my work I have to install a linear screw motor from the company Igus. It will be control with the constructor controller Dryve D1 (Dryve D1 Doc). I understood how to connect the motor, the ...
0
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1answer
60 views

DIY 3-phase fast linear actuator

I have a need for a FAST linear actuator of which I may control position and speed reliably. I have already been looking into pnuematics, however it does not seem that this will fit my needs (I am ...
3
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0answers
78 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. ...
2
votes
2answers
106 views

Powering a 3 Phase 230VAC Motor with 28 12V Batteries wired in Series

Mechanical Engineering student here. I'm a part of a senior project team that trying to run a 40 HP 230 VAC three phase motor with a 40 HP VFD for a hydraulic pump. Our plan is to wire 28 Lead Acid ...
0
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2answers
62 views

How will electromotor intended for 460V be affected by working on an installation on 440V?

How will an electromotor 150HP, 2-pole, intended for 460V, 60Hz, 3510 RPM, 197 AMP be affected by working on an installation where 440V/60Hz is the voltage? With regards to number of revolutions and ...
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1answer
40 views

Thermistor motor protection relay for thermal protection

In some of my induction motors PTC thermistor is available for thermal protection which will be integrated to thermistor motor protection relay. There are three PTC thermistors connected in series in ...
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0answers
25 views

permanent magnet synchronous motor Lagrangian in qd0 frame

I'm trying to derive a symplectic model for a permanent magnet synchronous motor (PMSM) in the rotating qd0 reference frame using a geometric integrator. For that purpose, I need the discrete-time ...
0
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1answer
80 views

Why does shorting the phases of a BLDC motor cause it to lock?

Normally a motor can be locked by shorting its phases. When the motor is not connected and we short all the the three phase terminals (tie them together) and try to rotate the shaft it offers lot of ...
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1answer
50 views

How do I add a bipolar stepper motor to this circuit? [closed]

I have just started electronics at school and cannot find any tutorials on how to do this. I am creating a circuit that when the light intensity increases a bipolar stepper motor will step clockwise ...
0
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2answers
30 views

How can I test a DC car blower motor with an external resistor?

How can I test a DC car blower motor with an external resistor? (note that there is an existing question about testing DC motors, but the assumption there is that it has an internal resistor, and it ...
0
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1answer
81 views

Current limiting a starter motor

I'm planning to try to build an electric go-kart. My idea was to use a 12V starter motor from a car to power it, since used ones are fairly cheap and easy to get. (I already have 2 of them to ...
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0answers
30 views

How to run 200 RPM motor on 5V Relay using NodeMCU?

The following circuit comprises of NodeMCU (ESP8266) which is intended to run a 200 RPM johnson motor. The circuit comprises of 5V Relay connected via Darlington pair using transistors. The circuit is ...
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1answer
41 views

Induction Motor Switching Surge

I would like to ask a question related with induction motor Whenever I switch ON & OFF a motor, a small voltage (3-8 V) produced at the metal surface where the motor is attached. I figure out ...
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0answers
20 views

AC servo motor driver problem (new, more precise) [duplicate]

I was not precise in last question. My AC servo motor driver "panasonic MSDA023A1A" which I use on CNC cutting machine is started to display alarm code "Err_18", which stands for regenerative ...
0
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2answers
50 views

Question about AC servo motor driver

Does anyone know what means when AC servo motor driver displays error code for "regenerative discharge", and stops working. What this mean in practical situation. This happens from 1 to 10 minuts ...