Rotor Angle Measurement Using Proximity Sensor
Need help understanding how to measure rotor angle using single inductive proximity sensor and speed signal which is also measured using proximity sensor.
4
replies
Emergency Stop Wiring for Multiple Remote ESTOPs
What is the standard to connect multiple remote ESTOPs serially to Estop Monitor Relay
1
reply
Synchronizing Variable Frequency Drives
Posted by sandip banerjee on
23 February, 2015 - 12:29 pmI have 3 drives (make-fuji) for 3 belt conveyors to synchronize.
New Replies:
By Steve Myres on
23 February, 2015 - 7:49 pmAre the three motors pulling on the same belt or on three physically separate belts that need to be...
3
replies
Maths Required for a Career Gas Turbine Controls
4
replies
Need to learn and troubleshoot VFD
I'm trying to fix a Saftronics PC7 Mini Vector drive that fails with "over current" when started when it is cold. If it is powered up for hours then it works much better.
New Replies:
By Bob Peterson on
19 February, 2015 - 11:24 amSafetronics was bought by Emerson. short of some serious failure mode, I don't see how it could...
Baldor H2 Inverter reverts to local control after fault or alarm condition.
2
replies
Brake Resistor Failure in Variable Speed Drive
We are using LTi PMII+ drives for pitching of wind turbines blade. we are facing failure of Brake resistors leading to dc link over voltages.
New Replies:
By Bob Peterson on
19 February, 2015 - 11:19 amIf the resistor is actually failing that is a sign that there is much more energy involved than...
By Curt Wuollet on
18 February, 2015 - 10:00 pmI'm not a wind turbine pitching expert, but If your resistor is rated at 300 watts your average...
10
replies
AC vs DC servo motor in high acceleration application
I require 20-25 Nm torque, high acceleration motor. The motor accelerates from 0 to 11.3 rad/s in 1.75 ms and then decelerates to 0 again in 1.75 ms. Do I choose AC servo or DC servo motor?
i need a user manual for Aeg minisemi dc drive.
14
replies
Magnetic pickup - amplitude or frequency
Magnetic pickup - amplitude or frequency
12
replies
Different Ways of Calculating Instantaneous Torque From a Servo
Posted by John Alperto on
8 December, 2014 - 7:52 pmI want to calculate the instantaneous torque from a servo. I was wondering if this can be done using the current draw, or externally using an accelerometer.
Looking for Operation Manual for AEG Minisemi DC Drive
Looking for an operating manual for an AEG Minisemi DC Drive 380
5
replies
Field Communicator 475 Meter Verification of Micromotion Flowmeter
Problem in meter verification of micromotion flowmeter through online HART
Simple Ladder Logic Question
Programming a conveyor motor. I seem to be stumped at the moment.
1
reply
Opinions Needed on Servo Drives/Motors
Emerson vs. Kollmorgen vs. Bosch Rexroth servo motors and drives over EtherCAT.
1
reply
Control Moment Gyroscope Transfer Function
Question about the methodology of determining the transfer function of a control moment gyroscope.
1
reply
Inverted Pendulum Control
Choosing method of controlling inverted pendulum using PLC.
New Replies:
By Bob Peterson on
4 February, 2015 - 5:30 pmThe math model ought to give you a basis to estimate the torque magnitude (and direction) required...
Parker motion drive TWIN2 drive " CAN error".
7
replies
Lossy NC Contact Blocks on Pushbuttons
Should I replace Estop buttons that are not reading 0 ohms Normally Closed?
New Replies:
By rootboy on
23 January, 2015 - 3:11 amHave an assistant jumper across the contacts while you are measuring voltage at the coil. If you...
basic differences between contactor and relay?
New Replies:
By pvbrowser on
16 January, 2015 - 4:03 am> The distinction of ... > Contactors often have auxiliary contact sets suitable for much...
I am new in the field of automation. Could anybody tell me the difference between PLC and DCS other than I/O handling capacity?
What is the easiest way to strip a HART signal?
New Replies:
By Roy Matson on
9 January, 2015 - 1:15 pmIf your HART signal is indeed interfering with the analog input how about sharing the information...
By Jorge Muñoz on
9 January, 2015 - 9:27 amI am sorry for my English. You don't have problems with hart signal because the average...
1
reply
Next Steps for Robotics Controls Engineer
Looking for advice on how I should approach my next career step.
trying to save energy with a VFD on a constant centrifugal fan load.
on 25 February, 2015 - 4:09 pm
on 22 February, 2015 - 6:18 pm
on 21 February, 2015 - 4:43 am
