Welcome to the new Motor Control Mailing list as hosted by Yahoo. Please feel free to contact me with any questions or suggestions that you may have. My...
3
Laurie
laurie1@...
May 15, 2005 6:39 pm
Hi there all. I need the above. I noticed from earlier correspondence that “it is expensive to build”. My problem is not only the expense of building, but...
Hello, I have a 40hp 3phase Danfoss drive connected to a 40hp 60Hz 3phase motor. We are operating the motor at 20hz to operate a press. Are we decreasing the...
5
istardi@...
May 16, 2005 9:53 am
Hello ... If your motor is induction motor. decreasing frequency will decrease rpm motor. cause n = (120f/P) and also will decrease output power of motor (...
Hello to the group. Michael here to let you in on my weak experiment. I took an ordinary light dimmer for $5 and removed the very small triac then replaced it...
Is it possible to soft start an Inudction Machine of 80H.P. please reply to this message. Its most Urgent. Thanking to all...
8
fintan lawlor
lrs_uk@...
May 18, 2005 11:29 am
Yes It is possible to soft start any ac motor, but it depends what the driven machine is as to whether it will be worth doing. If you want further details,...
Inline of the subject I have plenty of 3-phase AC induction motors from the range of 10KW to 450KW using to drive waste water pumps. Starting & stopping of the...
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fintan lawlor
lrs_uk@...
May 18, 2005 2:32 pm
Mohammed We can supply electronic soft start/soft stop for your pumps with cage motors. We can also supply liquid starters for pumps up to 20MW. Regards Fintan...
Sir, I want to soft start an INDUCTION MACHINE by varying the voltage by PWM Technique. Is it possible to start 80HP IM by using thisTechnique. What may be the...
Although you have not mentions the name plate motor voltage rating, but it is possible to soft-start induction motor upto 900kW motor (in 460VAC motor ...
I Think it is easy to drive IM . just take the PWM inverter and vary the voltage by varying the pulse width so that u can get the soft start as well as...
My computer is running Windows 2000. I have Allen Bradley Rslogix 500, Revision 4.10.01. Using Rlinx Lite Revision 2.20.01. Com cable is a 1747 PIC. I do not...
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Stanley Ngiam
stanleyngiam@...
May 20, 2005 1:03 pm
Someone passed me a transformer and they told me that this is an energy saving device for all lightings, even electronic ballasts. It operates on relay...
Hello Roy When you reduce the frequency of the voltage applied to an induction motor, you a) reduce the speed that the motor rotates at, b) reduce the...
... remote farm, ... for an ... Hello Laurie The cost of manufacturing a one off would be a number of times higher than the cost of pruchasing a commercially...
... experiment. I took an ordinary light dimmer for $5 and removed the very small triac then replaced it with an old very large triac (40 amp). It worked. I...
... It is certainly posible to soft start a motor of 80HP. I have soft started motors from fractional HP to over 2MW in size. The biggest problem can be the...
Hello Mohammed Yes, you can use soft starters in those applications. This is a very common application for soft starters. The advantages are the reduction in...
The soft starter operate by using phase control of SCRs to vary the voltage applied to the motor. This is an AC PWM control albeit at line frequency. It is not...
A current transformer is used to measure the current flowing in a conductor. The conductor makes up the primary and there is a scondary winding. If the CT is...
Current and voltage transformers are used for sampling high amplitudes. To measure high currents and voltages these are used. (200A / 5A) they are simple...
Hello; i am confused that; is high starting torque good? soft starters reduce starting torque. isn't it bad for some applications like cranes? Secondly; can...
On Mon, 23 May 2005 00:05:12 +0300, sedat aksoy wrote: >Hello; >i am confused that; is high starting torque good? soft starters >reduce starting torque....
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istardi@...
May 23, 2005 2:01 am
Depend to your application, some application need motor had high starting torque. Soft starter can be used to reduce high starting torque, It's ok to use soft ...
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Stanley Ngiam
stanleyngiam@...
May 24, 2005 12:12 pm
Hi everyone
This product has Digital Energy Management Controller that reduces energy usage and energy waste.
It is also known as an electronic interrupter...
Pacific Scientific PC800 brushless servo drive. We are currently using this drive to control a shuttle feed servo motor. It has proven to be reliably with the...
Without a mechanical brake, can we keep a motor stopping?(prevent the rotor rotating because of an external rotating force applied on its rotor) Can the dc...
