RTU over Ethernet Problem
Load Reactor Failure in Variable Frequency Drive
Repeated failure of load reactor on variable frequency drive
Torque and speed control in BLDC motors
I want to know the details of a speed control for a BLDC motors. I want to know the relation between the torque variation during speed control.
Wiring Up 7 Emergency Stops on a Conveyor
Looking for a diagram for wiring emergency stops on a conveyor.
By d on 30 March, 2017 - 2:33 pm
It is a matter of what is meant by e-Stop. A simple PLC (non-redundant) shut-off does not...
By Bob Peterson on 28 March, 2017 - 2:28 pm
without knowing more about what you actually have it is very hard to give you any advice. most such...
Variable Speed Drive for Pump Control
Variable speed pump and control
on 3 April, 2017 - 9:57 am
OmerASD, as you mentioned there's internal PID controller in VFD. so can I used to replace the...
PID Control Alternatives in Electro-mechanical Applications
What are Modern Alternatives to PID control in electromechanical systems and how are they different?
Differences between Servo and Vector PLCs
Differences between Servo PLC and Vector PLC and between Servo Inverter and Vector Inverter
By James Ingraham on 3 April, 2017 - 9:54 am
JRaef2, I love your explanation. One slight detail, modern vector drives are capable of running...
What goes with AC stepper drive, a stepper AC motor?
Beginner AC Servo Motor Guide
How to control AC servo motors.
Advice on a DC Motor Setup
Need help with setting the speed feedback for a 225 DC Motor with a ABB DCS800 drive
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...