An electrical actuator converting electrical energy into rotational motion.

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0answers
20 views

Linear (non-stepper) motor control with stm32f4

I have a linear motor equipped with a sensor, such as is used in the printer. My task is to set the desired position with two switches, and with the third switch to drive off the motor in this ...
0
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0answers
19 views

H Bridge Driver for Peltier Control [on hold]

I am using L6206 Full Bridge Driver for peltier control, but this IC doesn't have in-built OCP, Short circuit protection. L6203 has max peak rating of 5A and in my application, I need 2.5A. I come ...
0
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0answers
36 views

How to repair a CD/DVD Drive stepper motor with broken foil/tab [on hold]

I'm trying to salvage CD/DVD drive stepper motors. I soldered wires into the tiny PCB tab that comes over the coil of the motors but I used solid wires which bent and detached the foil from the motor ...
0
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0answers
15 views

Sevcon GEN4 SIZE 6, ME1304 coonfiguration/error [on hold]

This site was recommened to me by a friend so it's my first time using it. We are working on a group project, we have ME1304 software and we are trying to use it with a 72/80V size 6 Sevcon controller....
0
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2answers
92 views

What will happen if I connected 3amps adapter to motor that's need only 2.1amps are that will burning the motor?

I have 3amps power supply and the motor just need 2.1amps so if I connected they together are that will destroying the motor ?
1
vote
1answer
35 views

Control an inductive load with VCO

I am trying to tune this circuit, dimensioning the values of resistors Ra,Rb and the capacitor C... The circuit work in this way: a voltage Vin regulates the current flowing in the inductor, via the ...
0
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1answer
43 views

Help wiring DC motor

first post here. I'm wiring a DC motor and horn that will go into a small boat I built. I would like to get some help to see if I'm doing this correctly. -DC motor hooked to a 12v battery (Max draw ...
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3answers
68 views

Power a 12 volt water pump from a 110 watt solar PV panel

I have a 12 volt DC 9 amp water pump that I would like to power from a 110 watt 12 volt (17.2 volt at peak) 6.4 amp solar PV panel. I only want to run the pump when the sun is out, it's circulating ...
1
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1answer
53 views

How to estimate the settling time of the rotor of a stepper motor?

I'm trying to estimate how long I need my stepper's pulses to be to ensure I don't miss steps and assess how big the vibrations will be because of the ringing (i.e. how fast it can be, considering a ...
1
vote
1answer
48 views

High current motor control

When designing for relatively high currents, e.g. 6-10A, what is the standard practice for motor control? Is it to construct an H-bridge out of discrete components, to use integrated half bridges, or ...
2
votes
1answer
102 views

What is the difference between zero leading and zero lagging?

The armature reaction of an alternator will be completely magnetising when load power factor is A unity B zero lagging C zero leading D 0.8 lagging Though ...
14
votes
8answers
102k views

How are current and voltage related to torque and speed of a brushless motor?

I know that electric vehicles have different performances depending on battery and motor, but it's not clear how electrical and mechanical units are related. Can anybody please help? Will a 100V ...
0
votes
2answers
62 views

What current rating does my kickback diode need to have?

This seems like it should have been asked before, but I can't find anything. I've got a large 12v DC motor (11A startup surge, 7a running current) that I'm PWM-ing at ~20khz through a mosfet. I, ...
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votes
2answers
81 views

How can I learn interfacing Microcontrollers? [closed]

My study field was computer and I'm newbie in electronics. so sorry if my question is very simple or low level! I want to build a Microcontroller based board(I think it called MCU board?) and when I ...
1
vote
2answers
15k views

How to wire up a single-phase electric blower motor

I have an Electro ADDA C80M-2 0.75kW single-phase blower motor that I need to hook up, switched, to power a cyclonic dust separator that I've built. I thought it would be a piece of cake: pop off the ...
1
vote
2answers
99 views

Equalizing motors speed for balancing robot

I am currently working on a balancing robot project using Arduino Uno. I am able to get the robot to balance but one of its motor have the tendency to rotate more than the other. I am using the ...
1
vote
1answer
75 views

What kind of motor is this 14-lead beast?

I found a motor with a weared-out label (it is completely unreadable). No distingushable marks are found there, so I decided to measure it and to deduce what is could do for me. The motor isn't large,...
0
votes
1answer
77 views

MOSFET inverter switching losses/events - 3-phase motor

To keep this simple, let's focus on one half-bridge which supplies sinusoidal current to the motor. Q1 is the high side MOSFET and Q2 is the low side MOSFET. SPWM outputs change twice per period - so ...
0
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0answers
57 views

Blower (Fan) Capacitor on Water Cooler

I've got a water cooler that has a centrifugal blower inside it. The blower fails to start most of the time, but I've verified that the motor works because it starts with a slight nudge. A slight ...
0
votes
1answer
47 views

What is a torque motor exactly?

Wikipedia states Torque motors are normally induction motors of toroidal construction. Their main differences from other similar motors are their wide diameters, to allow for high levels of ...
3
votes
2answers
84 views

Can anyone give me tips on how to proceed with this triac/optocoupler/motor circuit fix?

I'm working on a Fisher Digital Vortex Mixer that has an intermittent issue in which the AC motor is energized, but no movement occurs. By rough estimate, this will occur on one of every 8 attempts. ...
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votes
2answers
92 views

PWM vs ESC for speed control for Arduino quadcopter

I'm from a computer programming background, but I'm interested in combining hardware with software, so I'm playing around with Arduino. Currently going through things on things needed to build a ...
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1answer
89 views

Frequency control of vibrator motor

I wish to generate a controllable frequency vibration on a device. The vibration frequency then has to be measured and filtered. For this purpose, I am using a vibrator motor as shown. Now, i wish ...
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votes
4answers
106 views

Motor control using potentiometer characteristics

I am trying to control a dc motor using potentiometer(armature control). Increase in voltage leads to increase in speed of motor. Even though this seems in accordance with general understanding, but i ...
4
votes
5answers
884 views

Detecting a wire break

I'm trying to design a circuit where it is essentially a motor controlled by a microcontroller with some feedback. The motor will have its own isolated power supply and the actual on/off switch will ...
2
votes
1answer
143 views

Connecting cables when end point rotates 360

I need to be able to rotate raspi camera 360' by motor and up/down by servo. The problem is that when I rotate it 360', all camera cables will tangle up. What is the method to make it right? I need ...
1
vote
1answer
64 views

Is the resistance in a DC Motor constant if the voltage is?

Is resistance in a DC motor constant if both the load and voltage are constant as well?
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1answer
227 views

How do I change rotation direction of single phase fan motor?

I have a single phase AC motor. I found it from Photocopy machine. That motor same to Fan motor. It has a capacitor to make phase angle. I don't know what is the correct name of my motor. Can I ...
0
votes
1answer
37 views

Dahlander winding: Does the voltage rating change between connections?

From my understanding, "normal" motors in delta/wye connection, have rated interphase voltage of 220V in delta, 380V in wye. But how about Dahlander motors? These are motors that are built to achieve ...
1
vote
3answers
12k views

How to change rotation direction of 3-phase electrical machines?

I was taught that if you want to change the direction of a three phase rotating machine that is rotating in forward direction, you interchange the phases. Since the phases has the same features (...
0
votes
1answer
115 views

Help With My Motor Controller Circuit Diagram

I'm a novice when it comes to electrical engineering, primary since I'm a programmer. However, I am trying to make a drone for fun and I made a really(REALLY) basic motor controller with some NPN ...
0
votes
0answers
22 views

How to implement a BLDC for variable torque in its phase (InstaSPIN, TI)

By chance I read this patented method to control the rotor pitch without a swash plate usually a helicopter, by adding two parallel hinges on each blade root. When add torque to spin it the pitch ...
0
votes
3answers
53 views

brushed motor torque and efficiency? [closed]

What causes the rpm difference between peak brushed motor torque and peak brushed motor efficiency? source: http://members.toast.net/joerger/AskAaron/motors.html page 15 of this brushed & ...
0
votes
1answer
23 views

How do I determine expected harmonic frequencies and corresponding amplitudes in a case of synchronous machine?

1)find harmonic frequencies which source in synchronous machine in a) fault, and b) fault-free operation conditions, in steady state mode. 2) and find how harmonics are depended on power factor, load ...
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votes
0answers
51 views

DC motor not working

My circuit is not working as expected. Only one motor is working. Every element is well soldered and well connected except one of the resistors and replaced it with a different resistance. So does it ...
6
votes
4answers
2k views

Why are motor capacitors huge in physical size even though their values are in uF range?

When I see some teardowns of single phase induction motors on the internet, I see their capacitors look like: Why are they that big in size compared to other caps, even though their value is in ...
-1
votes
1answer
54 views

How to power a 150W with rechargable bateries?

I would like to build a gocart using a 150W 24V DC motor. To power it I would like to build a battery pack using 2Ah rechargeable batteries. The motor will run about 2 hours at 50% capacity (the ...
0
votes
1answer
71 views

If a load is placed onto a DC motor, will the current increase? [duplicate]

When a load, such as a weight on string, is placed into a motors axle, will this cause the current to increase?
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1answer
72 views

Using an AC drill motor with DC?

I have this motor from drill that is powered from AC. Is possible to use the motor with DC current?
0
votes
1answer
52 views

Why do VR motors like sinusoidal current?

I have a question regarding powering electrical motors, variable reluctance motors to be more precise (ie. Stepper motors). This kind of motor, in a perfect situation would like to be powered with ...
0
votes
3answers
67 views

Trying to make an AC 3 phase motor run as smooth as possible at low speeds.

Is there a benefit in smoothness of rotation by increasing the outer rotor magnetic poles? Is there a rule of thumb for a 24 slot core vs number of magnetic poles?
0
votes
1answer
45 views

What causes servos to get damaged from high voltage?

I have 6 volt continuous servos. I needed to run them, but had no 6 volt power source nearby so I tried using a 9 volt 280mah rechargeable battery. The motor made weird sounds, but didn't work? I ...
4
votes
4answers
123 views

Methods for converting PWM to +/- 10v Signal

Suppose we have a PWM signal which controls the speed of a motor and a digital pin which specifies which direction a motor is travelling in, how can we convert these signals into 1 +/- 10V signal ...
0
votes
2answers
66 views

What does a motor driver do?

EDIT: I understand now, but with a microcontroller, why can't I just connect the data pin of the microcontroller to the data pin on the servo and the power form a battery bank to the power on the ...
0
votes
2answers
132 views

Overload relay nameplate

The following information appears on the nameplate / description of an existing thermal overload relay (for motor protection) I need to replace with a modern unit of same functionality: IEC 292-1 ...
2
votes
3answers
598 views

Can an electric motor create torque in a direction opposite to the current axle's spin?

Let's imagine a wheel spinning clockwise. There's an electric motor on the axle, and we want to spin the wheel counterclockwise. Can we just switch on the motor and it will work? I want it to slow ...
0
votes
0answers
26 views

Controll Motor-DC using PWM in Proteus and MikroC for PIC

I am beginner (10 days) in Proteus and Mikroc, but i prefer to learn and this is the reason for my post. I build a project using PIC16F917 and Motor-DC with L298 driver. I command motor to start ...
1
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4answers
84 views

DC motor causing noise on the power line

I've been building a circuit where I'm controlling a motor using a bluetooth module + phone. I've been having some problems, which mostly are fixed (see topic: previous topic). The main problem I'm ...
1
vote
4answers
275 views

What type of motor should be used to handle a static torque (blocked shaft)?

For the purpose of DIY robotics, I would like to have an electric motor, which is best for providing torque while not rotating. I imagine my robot will maintain a static balanced torque while ...