I am currently battling with a conveyor belt application where a 4M wide 1200M long belt driven by 4 motors using scoop actuated fluid couplings (which when fully engaged) uses almost twice the KW in 2 of the motors, as it does in the other 2. Can anyone direct me to a source of information on this subject, or perhaps offer an explanation as to why and how to control this ...
By Robert Miller on 10 January, 2017 - 5:50 pm
I work with 3 phase asynchronous motors often in dual or triple tandem. sometimes 5 motors (series...
Discovering Connected Modbus Devices
I would like to write a discovery tool which automatically detects the connected modbus devices behind the TCP/IP gateway
Understanding Electric Motor Dynamometers
I am trying to build a electric motor dynamometer to test AC/DC motors up to 20HP. I need help understanding some of the parts please.
Magnetically Coupled Drives
Can I use a magnetically coupled drive work through 2 inch thick polypropylene?
Drive PWM/Carrier Frequency Question
How does the carrier frequency relate to number of pulses a PWM drive puts out?
Placing a Motor in an Explosion Proof / Intrinsically Safe Location
What are the physical/electrical barrier requirements if I want to locate a motor in a hazardous location with its associated drive outside of the hazardous location?
Looking for recommendations for an evaluation board for a BLDC hub motor.
Absolute Encoder SSI Interface and Grey Code
How does an absolute encoder works with the SSI interface and what is grey code all about?
By Ron on 1 November, 2016 - 7:42 pm
To make it simple Grey code just changes one position at a time. In binary if you go from 1...
Will a VFD Output Single Phase?
VFD outputting single phase
By Curt Wuollet on 30 October, 2016 - 12:56 am
Even if they did, single phase motors of the usual types wouldn't really work well. Remember the...
By aan aan on 28 October, 2016 - 10:48 pm
Hello Mays, You can use a VFD to drive single phase motor, but the motor can't use a switched...
By Steve Myres on 28 October, 2016 - 7:33 pm
Single phase motors will almost never operate well at variable speed due to the way they start. And...
By Bob Peterson on 28 October, 2016 - 6:33 pm
Single phase motors have a starting capacitor. That makes them incompatible with VFDs....
Controlling a Stepper Motor
Controlling a stepper motor using variables, but am losing power when it starts moving
Position Control w. PLC and VFD
Position control using sensorless vector techniques.
By Bob Peterson on 12 October, 2016 - 1:34 pm
Instead of reinventing the wheel, why not just buy a VFD that has this built in. If you are using...
Absolute Encoder Emulation Card Issues.
Having issues with a Beckhoff EL-5002 card communicating with a Bosch Rexroth Encoder Emulator card (DAE02.1M).
What is the relation between input current and output current in a VFD?
By Curt Wuollet on 5 August, 2016 - 11:52 pm
Lots of questions, Generally power out = power in minus 5 or 10 % to account for efficiency, but...
By Bob Peterson on 4 August, 2016 - 5:55 pm
*I want to know the relation between input current and output current in a VFD. * Output current...
Medium Voltage VFD Drives for Sugar Mills and Cement Mills
I am working on the projects about MV VFD drives for sugar mills and cement mill motor control, for energy saving and process reform.
Need a count/pulse per foot
I would like to know which is the best method to check the stability of a PD adaptive algorithm
By Jeibros on 1 July, 2016 - 12:18 pm
Hi, I do not agree about using absolute value in this case, as this would imply that Kp and Kd...
Motor taking unbalance current with kick on the transformer
By Venkat on 17 June, 2016 - 11:54 am
Suggest to check winding insulation resistance and compare Thanks & Regards Venkat...
Siemens Hardware for Tinplate Scroll Sheeting Line
Configuring Siemens Hardware for Tinplate Scroll Sheeting line
I term in PID controllers
the I term in PID controllers - integral time and/or reset time?
By michaeli on 7 June, 2016 - 11:57 am
Bruce - you provide good example below for understanding integral action (IAT of 4 min) when using...
Variable Frequency Drive for BLDC Motor
Controlling speed by using a VFD for BLDC motor
By James Ingraham on 6 June, 2016 - 4:06 pm
It is not clear to me from your response why you MUST use a BLDC for your application. Why...
By James Ingraham on 25 May, 2016 - 5:42 pm
I do not believe that a standard VFD will run a BLDC motor. Why do you want this particular...
DC speed control is irregular
By Steve Myres on 30 May, 2016 - 7:54 pm
Your relay contacts are probably burned up to the degree where they're high resistance. Switching...
Measuring RPM of Urea Bucket using VFD and Inductive sensor
AB QB Module - Simple test program
Have some 1771-QB Modules to test
Replacing Modular Chassis for SLC 500
Posted by Danny Ferguson on 17 May, 2016 - 3:12 pm
How much programming after replacing SLC 500 Chassis
Looking for information on a motor controller that has a chip named PowerTrack SERVO V1.0
Berger Lahr Devicenet Data Sheet Wanted
Looking for an Berger Lahr Twin Line TLC53X Devicenet electronic data sheet file
I cannot control the driver. Serial connect only get "w" or "vw" charracter.
Control Cards of Inverter
Does having a power factor improvement panel effect in any way the control side operation of the variable speed drive?
Controlling Torque on a Brushless DC Motor
Is it possible to control the torque created by a 100Kw brushless DC Motor?
Gx Developer for servo control
By Ken E on 2 March, 2016 - 9:10 am
That's kind of an odd question. Here are a couple of possible answers: - If using Q series...
New to PLC's and Have a Project
New project retrofitting a metal cutting band saw with PLC and HMI, need help with software programming.
Communication Issue Using MODBUS TCP
Alternatives to Using Elmo Servo Drives
What Servo Drives fits what industry? And what other alternative do we have for compact servos?
By James Ingraham on 23 February, 2016 - 3:18 pm
"...what other alternative do we have for compact servos?" Advanced Motion Controls is...
Connecting a 25 HP drive with 20 HP motor