An electrical actuator converting electrical energy into rotational motion.

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2answers
80 views

How to determine the pole number or synchronous speed of an AC motor from its rated RPM?

Trying to to determine the pole number or synchronous speed of the following AC motor from its rated RPM. Here are the details: http://www.vanbodegraven.nl/en/products/ac-motors/asea-mbg-200-m-60-6/ ...
0
votes
4answers
93 views

Is the hfe of a transistor dependent on the resistance on the other parts of the circuit?

I have a circuit using a NPN transistor with a motor before it and a pwm into the base. The motors draws a current of 600mA if I plug it directly into the power source, just under the maximum allowed ...
0
votes
1answer
103 views

Most efficient generator for charging 12 V batteries

I have a Honda GX25 mini 4-stroke engine that I want to built a battery charging generator for 12 V lead acid batteries. My first idea was to use an old car alternator as the generator part, but now ...
6
votes
1answer
770 views

how does the circuit of a basic Variable speed electric drill work?

i am trying to 'automate' the control of an electric drill motor that im taking from a garden variety Variable Speed drill (from Harbor Freight) it has a universal AC motor which I basically ...
-3
votes
2answers
131 views

Controlling a DC motor directly with Raspberry Pi GPIO without any external IC or Transistor

I need to control a DC motor without the use of an external IC or transistor with the raspberry pi GPIO. I do not need direction or speed control. All I need is the motor to controlled by raspberry pi ...
-1
votes
2answers
105 views

Clarke-Park transform for a 3 phase induction motor current

I am facing some problems in performing clarke-park transform for an induction motor(4 pole stator, squirrel cage IM). The motor is run with three sine wave inputs, 120 degrees phase shifted with each ...
1
vote
1answer
73 views

Testing an h-bridge using the power supply and/or signal generator to control a DC motor

I'm using the DRV8836 (datasheet here) from Texas Instruments and can't seem to get it to work. Does it require a PWM (pulse from the signal generator) or am I able to drive it with only the DC power ...
1
vote
1answer
44 views

Running a 4-DC motor Circuit

Currently I'm doing a project where I am simply trying to get a robot to move forward without code by using say a push button or a potentiometer. I plan on moving on to micro controller later, but ...
0
votes
0answers
82 views

BLDC Motor Control - Determining PWM Switching Frequency

I've read that the PWM switching frequency should be anywhere from 200hz (high inductance motor) to 64khz (low inductance motor) in order to minimize torque/current ripple at perhaps the expense of ...
1
vote
1answer
518 views

Correct Wiring of 1 phase 220v Electrical Motor

I am trying to install a single phase 220v electric water pump. I am fairly certain that it is wired correctly however the water pressure it is pumping out is absolutely useless. I have attached how ...
-1
votes
1answer
41 views

Basic motor principles

If a tube shaped permanent magnet with circular magnetic field was introduced in to another external magnetic field, would a force act at right angles as it would a copper wire with DC voltage ...
-1
votes
1answer
56 views

I have buyed a 750 rpm torque 3kg.cm motor but i am not able to calculate the amount of torque and rpm avilable on 7cm tyre

This is the motor i buyed http://www.snapdeal.com/product/core-dc-helical-geared-motor/719331155 I am working on project for science fair but it has become too much confusion that how much weight ...
0
votes
0answers
15 views

Determining V/RPM relationship based off of RPM/torque/current curve?

I am trying to determine what voltage will give me a X RPM of a motor. The motor can be found here The pdf showing the torque/RPM graph can be found here. I have an idea of how to go about solving for ...
0
votes
1answer
69 views

High Voltage MOSFET Controller - Random Failure

I have a 120V DC Motor that I need to control the speed of. I am doing this through a High Voltage PNP transistor (MJW21193) rated at 250V and 16A with a peak of 30A as I understand it from the data ...
0
votes
2answers
143 views

Taking an unstable DC voltage, and stabilizing it

I have a DC motor generator (basically the motor spins, and it powers an LED at the moment), and the output current (mA range) and voltage is very unstable. For an entire circuit to run on the ...
0
votes
1answer
50 views

Stepper Motors : KG.CM Torque : Does it maintain the torque when connected to a rod?

I am currently building a machine for a school project.I have a pivot point and wish to use a stepper motor to turn the base at an angle. The base is carrying a load of approximately 10kg. I was ...
-3
votes
3answers
109 views

may i know what is wrong in this circuit?.. forward-reverse motor

what is wrong in this circuit this is a circuit for a forward-reverse motor.. what is wrong on this?? I made it on PCB board and it doesn't work!!
-1
votes
1answer
179 views

DC motor speed control: 12VDC 700mA fan motor powered by 7.2Ah sealed lead-acid battery

I am using a 7.2 Ampere-hour Sealed Lead Acid Battery to power a 12V DC motor which is driving a fan, and I need to understand ...
0
votes
1answer
70 views

Transistor based relay driver for DC motor is not working with 12V-8A DC motor?

I am trying to run a 12V-8A DC motor from pic microcontroller output pin via relays(28V-30A output rating). It only starts for a split second and stops. Where as small DC motor runs perfectly on the ...
-1
votes
1answer
96 views

How to reverse the direction of operation of the motor?

For Synchronous buck, half bridge converter, how to reverse the direction of operation of the motor? That would be great if you could explain me with the circuit diagram.
0
votes
0answers
41 views

DC or Stepper for exoskeleton arm

I want to try to do an exoskeleton arm, so I need at least two motors, one to simulate the power of biceps and another for shoulder, I had only use stepper motors and dc motors, but Im not sure if ...
1
vote
3answers
128 views

D.C. motor works underwater?

I recently immersed a small, 10 volt D.C. motor underwater for experimentation purposes. When I turn on the power, always to the same power level, it SOMETIMES spins effortlessly, and other times it ...
-1
votes
2answers
166 views

Many small and cheap linear actuators [closed]

Me and my friends are trying to build a linear actuator matrix. It's supposed to be a grid of pins that go up and down at reasonably fast speed (more than 1cm/s, the faster the better). Problem is, ...
-1
votes
1answer
184 views

wiring for a 4 wire AC motor

I have a working garage door opener and I'd like to use its motor for building a edge sander (woodworking). The model number is the Genie IMS1000 and here is the actual picture. It has a single ...
0
votes
1answer
325 views

What's the relationship between ESC pwm input and output?

I'm using ESC(Electronic speed controller) to control outrunner brushless dc motor. As you know ESC detects ppm signal between 1ms and 2 ms approximately. So my ESC detects signal between 4% and 9% ...
0
votes
1answer
75 views

Purpose of Charge Pump in Motor Driver IC

I have seen and understood the purpose of charge pumps. Used for pumping voltage levels in case of RS232 transceiver IC's. But most of the motor driver IC's also includes a internal charge pump ...
0
votes
1answer
47 views

DC Motors Power Supply Connection

I am currently working on a project using Arduino UNO and two 3 volts DC motors. I chose a 9 V Goldtop battery to power my Arduino. The two motors draw voltage through the 3.3 V pin in the Arduino. ...
0
votes
1answer
28 views

What does Adafruit motorshield max amperage mean?

On the Adafruit motorshield it says "1.2A per motor (3A max)." What exactly is this telling me, that the motors are drawing 1.2 amps from the battery?
0
votes
1answer
33 views

L293ne wireing help

First real project in many years so please accept my apologies of this is a silly question. I want to use the L293 to drive a motor (or 2). Using a raspberry pi which I have done using the add on ...
1
vote
2answers
87 views

Some basic questions concerning Stepper motor with geared head/geared box

Some basic questions concerning Stepper motor with geared head/geared box. What is the meaning the reduction 1:56 (1/56) or 1:100 (1/100) or 18/1? According to some charts: How can i know ...
0
votes
1answer
35 views

Providing external voltage to a motor connected to arduino

I am a noob in electronics . I am just learning it bit by bit. The below is my connection. As you can see pin 13 is connected to one terminal of the motor and the other terminal of the motor is ...
-1
votes
2answers
68 views

Providing a higher voltage to a motor [closed]

I have a 9v motor but I want to give it a lot of voltage so that it can open a door lock so if I attach it to a 18 v battery source will it be alright? Noob in electronics . Help is highly ...
0
votes
1answer
140 views

Help with building a 3 Phase DC Motor Controller

I'm looking to design the power stage of a 3 Phase DC Motor Controller for use with the Emrax 268 motor. The maximum input battery voltage would be no higher than 300VDC and the maximum continuous ...
-1
votes
2answers
95 views

will i damage this toy motor by running it on a higher voltage? [closed]

I have a hand held shaver that is chargeable. the socket plug for the device says 02A250V- and the green battery inside the device looks like this: and the ...
-2
votes
1answer
85 views

Running a toy motor using Arduino

I have setup a circuit to run a toy motor using Arduino. The fritzing diagram link is below. Motor starts spinning but only after I manually rotate the axis. Could it be because there is not ample ...
0
votes
2answers
143 views

running AC synchronous motor with DC

I have a gadget that does contain a 12V AC synchronous gear motor (2 Terminals) that i want to hack. I want to supply the gadget with 12V DC (among other changes). Up to now i use tiny AVR and a ...
0
votes
0answers
32 views

Controlling Linear Actuators

I have two 24in linear actuators (http://www.progressiveautomations.com/linear-actuator) that run at different speeds when I connect them in parallel to a 12V battery. How can I get them to run at ...
-1
votes
1answer
65 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 ...
3
votes
1answer
135 views

3-phase Brushless Motor - Are Volts and Amps at (X)RPM equal/similar when used as Generator?

If I have a Brushless 3-phase motor that spins at 3000rpm when given 6.0A @ 20v (no load) will it produce 6.0A and 20v (or anywhere close) when used as a generator and spun at 3000rpm?? And i suppose ...
0
votes
1answer
36 views

Continuous charging and varying load on 48v AGM - Will an ESC work with a battery that is being charged?

So, in a lightweight IC/electric hybrid motorcycle I am using a small 4-stroke engine to turn a Brushless RC motor (the generator). Then a 3-phase rectifier bridge to supply 59.2v DC @ 12amps to a 48v ...
0
votes
1answer
73 views

How to estimate motor current under load

How do you estimate the average current under a typical load of a brushed DC motor? I'm trying to size the right motor, motor driver and battery to propel a small two-wheeled platform using this ...
0
votes
3answers
62 views

Is there a change in the voltage/current when motor is locked up? How can one sense this?

I am working on a motor control system, and I'd like to be able to know when the motor has reached its max output and has locked up (shaft no longer able to rotate, due to mechanical force pushing ...
-1
votes
1answer
152 views

L293d pin1(enable pin) problem

I am working on dc motor speed control project in which I am using 12 v dc motor , l293d motor driver ic and pic16f877A for controlling the motor. Pic16f877A is sending pwm signal from its RC2 ...
2
votes
2answers
85 views

Inrush Current Booster

I probably need help more with terminology (and thus, how to find the answer that already exists) than with technology. My current hobby project is a low-power device — max current is 100mA at 5V* — ...
-1
votes
1answer
256 views

How do I make a 6v DC motor charge a phone battery via 5v, 2amp

I am a high school student who knows absolutely zero about electrical engineering (I may have even misworded the question), and I am interested in how I could connect a small motor (as in putting a ...
0
votes
1answer
35 views

Measure the current draw of a motor with a slow multimeter?

I have a motor that is in a printer housing (inkjet - the one that moves the head back and forth). The motor is attached to the printer head assembly. I want to measure the current draw of the motor, ...
-2
votes
1answer
88 views

Electric style motor speed control [closed]

I was just wondering how I would go about making a pedal that controls the speed of a motor. It would also have to include reverse motor capability. My tech book at school already has a circuit for ...
2
votes
2answers
141 views

Is it possible to change the speed of an AC motor(drill press) without losing too much torque?

I have a drill press as in the image below, it runs from 110V AC 60Hz and has internal belt reduction. Unfortunately however for some materials and hole widths, I need it to go even slower than It's ...
1
vote
2answers
68 views

Calculate rotor slip without knowing synchronous speed

I am given the rated values of a squirrel cage induction motor: A 300hp, 2300V, 3‐phase, 60Hz squirrel‐cage induction motor turns at a full‐load speed of 590r/min. What is the approximate value ...
-1
votes
1answer
89 views

How is low starting torque of asynchronous AC motors addressed when driving elevators?

Long before variable frequency drives became popular elevators were often driven by dual-speed asynchronous AC motors. Switching speeds was done by changing the number of poles (which is done by ...