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Nominal RPM on motor plate lower than can be set in VFD
Looking for recommendations for a Field-bus Actuator
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Anyone have any suggestions? ...
Thanks David, but i think I'm looking for something different then those you recommend.
I'm...
You need a positioner with Fieldbus communications, not an actuator. The actuator does the...
I am seeking advice on the best methods to effectively control a stepper motor.
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Why a stepper motor and not a BLDC motor?...
Single controller for multiple purposes
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By Sam on 14 July, 2014 - 9:00 am -
Sound a lot like a split range control that you need to do in this application. In a split range...
what does Maximum Shock Protection =5,000 g, peak mean?
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By Curt Wuollet on 12 July, 2014 - 12:31 am -
Gravity. 1G is what holds you to the earth.
Regards
cww...
By Faris on 11 July, 2014 - 12:02 pm -
But what does G really stands for?
I mean g can be grams and MB can be Mega Bytes
But what...
Starting and running an ABB type AC motor
I have a noise problem associated with a VFD/motor (75HP 460v wye start/delta run) system...
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By Kevin on 10 July, 2014 - 8:46 am -
Dear Sir,
I was doing some trouble shooting and observation on inverter operation today. We have...
Magnetic pickup - amplitude or frequency
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Ramana,
There is a lot of good and applicable information in the previous posts to this thread....
By Ramana on 9 July, 2014 - 7:46 am -
Dear friend,
Please need a help about magnetic pickup unit sensor. Am confused about the sensor...
On site servo drives health check
does hand mean hand or Auto?
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By d on 7 July, 2014 - 4:06 am -
OFF - control circuit de-energized
AUTO - the rungs containing the automatic controls are...
Energy stored in wounded spring!
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I believe that you refer to centrifugal pendulum based governor used in diesel generators to...
>How do old mechanical gramophones
>ensure constant RPM output?
They use spring loaded...
How load in form Torque varies with speed.............
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By Bob Peterson on 2 July, 2014 - 10:22 am -
a VFD operating in V/Hz mode at under 3% of its rated frequency is probably not going to develop...
By Gerald Beaudoin on 2 July, 2014 - 8:37 am -
Trying to run a motor at <3% of the rated speed is never very good.
First of all, cooling...
I want to select a BLDC motor for the application.
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By VIJAYKUAMR on 30 June, 2014 - 1:49 am -
Thank you for the reply.
But indirectly the motor is responsible for the response of the...
It seems that you talk about system resolition in mrad. And this question is more related to...
i need a user manual for Aeg minisemi dc drive.
I need to control a FC51 Danfoss VFD with LS PLC.
I need to start , stop & jog the drives.
I need to start , stop & jog the drives.
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By Farhad on 28 June, 2014 - 4:35 am -
Hi,
I have this problem too.
I have set all the parameters to control the drive as modbus. I...
question on induction motor and overheating
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By damien herold on 26 June, 2014 - 1:21 pm -
>I would bet on it, it also won't have
>much for torque if it will run that slow
>at...
from the Forum department...
Encoder requirements for a motion application (low speed/holding positions)Encoder requirements for a motion application (low speed/holding positions)
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By Peter Nachtwey on 25 June, 2014 - 11:37 am -
How fast you want to go is usually not a problem. How slow you want to go is. If the controller...
We have a number of Harowe harosyn-rw resolvers that are giving us some problems on an old GE servo motor,(used in a B&S CNC). Can someone explain how to test resolvers using basic test equipment?
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By o tempora on 23 June, 2014 - 12:36 pm -
This works as of June 2014 There is not a space after the "40", which for some reason...
Control Valve FF positioner (Masoneilan FVP-110) Action (Direct/Reverse) and travel scale range.
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By I Muchimwe on 23 June, 2014 - 5:53 am -
Please take note that there are 3 actions/parameters which determines the final valve travel...
problem installing timer relay for AC motor with VFD
pneumatic control circuit tubing color code standards
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the standard is customized, and stated on the pneumatic plan. for example:
BLUE: AIR SUPPLY
...
How is speed of the motor calculated INTERNALLY by a VVVF drive?
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By Curt Wuollet on 9 June, 2014 - 7:03 pm -
An educated guess usually. For most purposes 100% accuracy isn't important and if it is, you use an...
By Setu on 8 June, 2014 - 10:05 pm -
> For induction motors:
> Drive output freq - slip = motor speed.
How will the drive know...
By krishnan on 8 June, 2014 - 11:42 am -
As per my understanding for drives without encoders the drive calculates the actual speed based on...
By Curt Wuollet on 8 June, 2014 - 9:28 am -
For induction motors:
Drive output freq - slip = motor speed.
Regards
cww...
Need to change with a 37 KW DOL starter (3 Wire) winding to suitable soft starter or drive control to reduce starting load.
Over speeding a motor by reference signal even if the frequency limit has been set in the VFD module
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Thanks Steve...
By Steve Myres on 26 May, 2014 - 12:41 pm -
Shouldn't be. Every ABB drive I'm familiar with respects the limits regardless of any other...
Yaskawa servo motor working noisy & vibrating
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The possible reason for noise is instability of velocity loop usually leading to current ripple...
Understanding of how PID controller affect a system.
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By Hans H. Eder on 23 May, 2014 - 1:04 pm -
> Could you tell us what control system you're using? i.e., DeltaV? Yokogawa? ControlLogix?
...
By Fluoronator on 23 May, 2014 - 7:37 am -
Could you tell us what control system you're using? i.e., DeltaV? Yokogawa? ControlLogix?...
By Hans H. Eder on 22 May, 2014 - 2:35 am -
PID functionality can be expressed in several ways. I prefer the discrete time, incremental...
What are the advantages and drawbacks of using LQR (Linear Quadratic Regulator) design method? Does it always work?
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By manoj on 20 May, 2014 - 1:29 am -
please use Bryson rule.. that is best rule. by using this rule you can reach to some point and then...
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