A circuit used to control the speed of a moving device. Usually accomplished by controlling power/fuel supply to a motor or braking system.

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2answers
71 views

Overvolting a dc motor while keeping power constant

So i have 36v dc motor rated 70A at 2000w (mechanical output power) . I would like to run the system at 48v (same power) because i have a lot of accessories for 48v system ( battery chargers , dc/dc ...
0
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0answers
33 views

Can you use a vfd to run a capacitor start motor?

I've read on many forums, publications and specification sheets that it's not possible to run a capacitor start motor using a VFD. The start winding of such a motor is momentarily powered until the ...
3
votes
1answer
90 views

What is the rectifier's role in this AC dimmer circuit?

Here is a typical AC dimmer circuit: http://www.eleccircuit.com/wp-content/uploads/2010/09/light-ac-dimmer-120watt.jpg I just came across another variant which uses a rectifier: http://www....
4
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1answer
63 views

Is it possible to guess a reasonable Kp and Ki based on motor parameters for speed PI control

Regarding motor speed PI control, there are tons of articles about it. However, I searched many and noticed that most of them just tell you how to tune Kp and Ki following different methods. But they ...
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1answer
201 views

Controlling a single phase AC fan with a 0-10V DC input

I have a fan motor which is a permanent split phase single phase capacitor motor: http://uk.rs-online.com/web/p/axial-fans/2781543/ I currently control this fan's speed with the following controller:...
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1answer
86 views

Motor speed based on uF of capacitor

I have a single phase duct fan that that run by a capacitor and its running too fast. I don't need it at this speed. Motor: Single Phase Motor 78w @ ...
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1answer
59 views

Does this speed controller alter resistance or capacitance?

The attached image is of a ceiling fan speed controller module I brought online. It seems the attached circuit mainly consists of some capacitors. This makes me believe that the 4 different settings ...
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2answers
292 views

smooth a DC motor movement

I have a DC motor (controlled by an arduino MEGA) and I plan to move some 3D Printed gears and a pulley. I have a problem with the belt jerking when power is applied to the motor through the arduino ...
3
votes
4answers
132 views

How to control a blower using the analog output from a PID controller?

I built a biomass burner which is powered by a blower. For precise control of temperature I am using a PID controller PID500 from a company called selec . I passed the PID analog outuput to a VFD ...
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2answers
75 views

Can I control the speed of this motor? [closed]

I have this motor from an older bandsaw that is broken. I would like to re-purpose it but I need to be able to control the speed. Is it possible with this motor and what would I need? I see people ...
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3answers
339 views

Significantly reducing speed of single-phase AC motor

I have a 1/3hp single-phase AC motor spinning my drill press. With the maximum reductions available through pulleys it still runs 10x too fast for one of my applications (i.e., the chuck turns at ...
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2answers
98 views

switching DC trolling motor to generator

Would like to drag the trolling motor prop while sailing to re-charge the battery. The trolling motor is 12 VDC and the max amps at full forward speed is 50. The sailing speed of the boat will turn ...
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1answer
93 views

Hacking an RC car controller to implement a joystick (PWM)

My RC car controller (transmitter) has only 4 buttons (left wheel forward /backward, same for right) I want to implement a joystick using Arduino. The Arduino will use PWM on the transmitter ...
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2answers
52 views

Finding an ESC for a LiFePo4 Battery

I have a project that uses 12S LiFePo4 batteries, and I need an electronic speed controller. The main problem I have is that pretty much all the existing ones I've found are designed to work with Li-...
1
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1answer
111 views

Controlling Speed and Powering 12V DC Motor with Arduino and Wall Supply

first post here. I am a mechanical engineering student, but know little about electrical engineering or electronics. I am doing a project that requires me to (affordably) control the speed of a 12V DC ...
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2answers
143 views

Can this circuit board control DC motor bidrectionally? [closed]

I bought these "motor speed controllers" from Ebay recently with the intention of controlling the speed and direction of a DC motor: http://www.ebay.com/itm/Universal-DC10-60V-PWM-HHO-RC-Motor-Speed-...
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2answers
676 views

DC Motor control setup and circuit design. 1.5Hp continuous duty @ 95v dc

I have a DC treadmill motor rated at 1.5Hp @ 95v Continuous duty, though the motor label also states that it is a 2.65HP motor and that the amperage is 21.4. I would like to be able to SAFELY run and ...
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1answer
116 views

VFD and Car Batteries

Can I use a VFD to drive a 3 phase motor if I drive the VFD with 48V from some series car batteries? The VFD has a single phase input and 3 phase output. Is it just a rectifier in there that charges ...
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1answer
394 views

Voltage divider on AC current?

I have a 90V PMDC motor with an triac/diac speed controller. Although, I am not sure, the power output is around 90V, but it may be higher. The torque is fairly constant, but it hiccups at the lowest ...
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1answer
392 views

Motor speed control mosfet

I have a Raspberry Pi and I want it to control DC motor speed. I make the pi output 3x3,3V for controlling the speed. I need circuit that works like this; when one output gives 3,3V motor have 6V, ...
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2answers
2k views

control AC fan speed using microcontroller

I have been trying for a long time to digitally control the fan speed and light intensity of a dimmable LED bulb, but I am not able to. Basically I want to replace the mechanical potentiometer with a ...
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3answers
2k views

Power and control 3 phase ac induction motors with dc source

Background So we are making a drive system to be used in a medium sized catamaran. The catamaran will use two water-jets powered by two 3 phase 380v ac induction motors. The entire system will be ...
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1answer
136 views

L298N Module Out 1 and Out 2 failure

I have an L298N motor controller module, rated at 5 amps. I'm using it to control two 12 volts linear actuators, and I'm using a current sensor per motor to learn when the motors have reached a high ...
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1answer
83 views

PWM input voltage regulation

I have a 12V DC motor that I plan to run in one direction with PWM input at 21A. However, in the other direction I want to drop the voltage to limit the speed. Ideally. the regulator would sit between ...
1
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1answer
98 views

Is it possible to use 2 relays instead of a DC motor controller?

I have been for motor controllers to control two 12V motors that have a stall current of 130A and at max power (expected operation) will draw 68A. I am having trouble finding low cost motor ...
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1answer
575 views

Radio Control DC Motor With Potentiometer

I am looking to control a 12V 16A 180RPM DC motor. The package I am purchasing includes this motor, and a speed controller. Please see this link for the exact detils. The speed controller comes with ...
2
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1answer
2k views

Control of 4 pin cpu fan with 3 pin socket and …?

I have a problem with controlling my cpu fan speed since it has a 4 pin connector and the socket on my motherboard is broken (transistor connected to it has burnt). I have it connect at the moment ...
11
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6answers
37k views

How do ceiling fan controllers work?

There are some devices that look like ordinary light dimmers, but are sold expressly for ceiling fan speed control. For example: Lutron Diva Quiet 3-speed control. Unlike an ordinary dimmer, this has ...
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2answers
320 views

Doubt in PMDC motor pulsed switching current

I am controlling a dc motor by switching through the MOSFET. I am able to run the DC MOTOR and I have measured the current through scope by putting a RESISTOR SERIES of the DC MOTOR. My doubt is, ...
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1answer
434 views

How to calculate switching frequecncy [duplicate]

I am trying to control a brushed DC motor with PWM control through a MOSFET, below is the basic circuit for an idea. The PWM signal is given from a microcontroller to the gate driver IC which drives ...
1
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0answers
2k views

What's the theory behind speed control of a multi-tap multi-pole induction motor?

Ceiling fans are an application of multiple-pole capacitor-run/permanent split capacitor induction motors, and they appear to control the speed through a partially powering and shunting multiple-tap ...
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2answers
6k views

Need help with 90vdc PM motor speed control circuit

I recently found a Permanent Magnet 90vdc motor, 2.5hp, 18Amps. It has simply two wires for voltage (red/black) and two for thermal breaker circuit i believe (blue/blue). It came out of an old ...
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3answers
12k views

How to decrease the motor Speed without losing the maximum Torque

I am using MDS40A motor driver(http://www.cytron.com.my/viewProduct.php?pcode=MDS40A&name=SmartDrive40) to drive a power window motor (12V, brushed motor) similar to the one at (http://www.cytron....
3
votes
1answer
2k views

TRIAC switching problem

I have a speed control circuit for a 230V AC motor. It has a BTA16 TRIAC for phase control and it is driven by an optocoupler MOC3021. The trigger signal is coming from a PIC16F676 microcontroller. ...
2
votes
3answers
2k views

AC motor Low RPM problem

I'm working on a controller for ac induction motor and it's spec is given below. I could control the speed without any trouble at higher speeds like 2000 rpm and above. I'm using TRIAC phase angle ...
1
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1answer
457 views

Driving a brushless DC motor (with a UC3625?)

I am trying to drive a brushless DC motor with hall effect sensors using a microcontroller and a TI UC3625 controller. Thing is, I haven't had much luck. Its a beast of a chip and I've tried wiring ...
1
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2answers
861 views

Dead time effects Of IGBTs

I'm working on a project to control single phase ac induction motor in which I planned to use two IGBTs, one for switching the PWM to the motor (for AC chopping, PWM frequency is fixed @16khz) and one ...
1
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1answer
788 views

Need help on speed control of single phase ac induction motor

I'm working on a project "single phase ac induction motor speed controller". The spec of the motor that im going to use is 230v,1/8hp ,8000rpm@no load I want to know whether it is possible to ...
6
votes
2answers
1k views

Help with 555PWM motor control

I'm making a laser spirograph for a school project. It requires speed control of three motors. I used a simple 555 astable circuit with a pot for control, then the output goes into the base of a power ...
4
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3answers
1k views

Multiple motor speed control with a single triac

I have a requirement where I have to control the speed of 10 motors. The motors are 230V AC single phase motors. The speed of the motors need to be increased or decreased using a electronic controller ...
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2answers
285 views

Simplest way to control the speed of 4 identical fans

Hi, my computer has 4 fans in it running on 12v from the PSU. How can I control their speed? Maybe a potentiometer?
3
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1answer
406 views

Controlling a Motor for test bench

This is my 1st question here and I'm stumped... I spent all my EE classes on programming and ICs. When it comes to AC and motors, I feel worse than ignorant and spent all day trying to research where ...
3
votes
2answers
7k views

Control speed of Nidec fan?

First of all, sorry for my lack of knowledge in the subject. I have a Nidec TA450DC B35502-35 fan which I've installed in a large wooden cabinet where my computer and other electronics sit. This ...
1
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1answer
2k views

What electric motor spec clues indicate easy speed control options?

I'm investigating HVAC fans etc to design my own system and controls, and having fully variable speed control is an important consideration to me. I'm pretty sure there are types of AC motors that ...
1
vote
1answer
2k views

Use a PWM or other controller for 24V/500W application

I've been gaining understanding about using PWM for a motor speed controller. I'm developing a project (go kart) that uses a 24V DC starter motor and I want to build a motor speed controller that is ...
1
vote
1answer
282 views

Half bridge motor driver

I have some doubts about this circuit: http://hackaday.com/2011/10/28/motor-drivers-half-h-bridge-with-brake-and-more/ Is this schematic correct?
4
votes
1answer
10k views

What power motor should be used to power a Segway-like device

I am planning on building a personal transportation device which will either be a skateboard with a motor etc or a Segway-like device. I will have two wheels and must be capable of getting me to move ...
7
votes
6answers
9k views

How do you minimize stepper motor vibration?

I'd like to run a stepper motor at a very smooth, constant speed, with minimal vibrations to both the mount holding it and its output. How do I drive the stepper motor so that speed remains constant, ...
0
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1answer
298 views

Electronics - ISO 42v DC Brushless Fan to 110AC with Speed Knob MOD HELP

I'm looking to Mod a 42V DC brushless fan to work on an 110-AC outlet and incorporate a speed knob into the build. This is the info that I have: Fan was originally pulled from a Cisco 7600 Series ...
6
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3answers
8k views

3-phase Motor Speed Controller

Background If you look at my profile description, you'll see that I'm involved in building and wiring up Carnival floats that are powered by an 800KVA, 415v, 3 phase Generator. Electrically, they ...