a vfd INDUStrial ELECTRIC AC motor SPEED CONTROLLER(inverter)

hi may i know if teh following item could be classified as teh inverter for control my IM in my project, (to start, stop, and brake the 3phase IM)

this item i found over in the rs catalogue

name: INDUStrial ELECTRIC AC motor SPEED CONTROLLER(inverter)
1phase input/ 3phase output 601 series

an advanced range of inverter wif many freatures build in as standard including RFI filter and programming/operator controls

• build in rfi filter meeting european EMC emmissions standard EN 50081-1
• build in programming controls
• build in remote or local cotrol of start/stop, forward / reverse and motor speed
• pull ot guide provides reference data
• freq (speed) analogue output
• 0-10V; 4-20mA ; 4 preset speed demand inputs
• ramp/coast /injection user selectable braking
• high torque voltage boost and 150% current overload
• password protection
• job input
• separately adjustable minimum /maximm speed and acceleration/decelaeration ramps
• bright easy to read LED display
• DIN rail for direct panel mounting

--end--

because i havent got any experience of standard-computer-casing size invwerter, may i know if it is possible still, to use the ge fanuc PLC in my lab for controlling this inverter? because this inverter, (which i think is most related to my project) as it is for 1phase inoput/3phase output to a 3phase IM.

usually, the programming is done from the PLC into teh inverter i presume.

1 last thing, is that, what i discoverred from the specification of the iverter is that, it already got start/.stop braking fuctions build, in. do i still program in ladder?

please enlighted me!!
thanks !!

You can generally control any inverter (VFD - Variable Frequency Drive) from any PLC.

You program outputs from the PLC to start and stop the VFD.
You use an input to the PLC from the run and fail contacts on the VFD to verify running and detect a fault.

You use an analog output from the PLC to the VFD to set the speed.

Braking, acceleration, and deceleration are generally controlled internally by the VFD.

You can generally control any inverter (VFD - Variable Frequency Drive) from any PLC.

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thnaks tom!!
also the advice r useful!!

thanks for the reply, but do i need extra acessories for braking the motor, starters etc b4 i purchase the vfd as shown?


please enlighten me . or do i can place the purchase, and start working on the programming, and hence hook up to teh IM ?

Hi,

What do you mean by braking the motor?

Rudi

if u cant do something this simple you need to get a new major. Is this forum your school, if so you owe these people tuition.

This is a forum for helping people all the rest is a waste of time. See the reply above.

Rudi

if u cant do something this simple you need to get a new major. Is this forum your school, if so you owe these people tuition.

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i m sori if i had offended u anyhow,

please, i apologize if i m wasting your time. its just that, teh labs isnt equipped with teh proper equipment. i need to confirm before i could come to using the budget. its my first experience..

i know, i had been vague all this while, i m trying to improve. sori if i offended anyone.

i just hope purchasing the inverter, could solve my doubts, if tehre is any other pieces, equipments apart from plc, inverter, and IM that i need such as starters,

i m sorri if i had come to so much trouble, its my first experience, i would appreciate any advice, please.

Braking, acceleration, and deceleration are generally controlled internally by the VFD.

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ok so, that means, i would be posible to program the ladder to work on the braking of the induction motor as well. just a decent braking ,

the braking i mean is, stopping the motor, asap


the scope is implemented on a no load induction motor.

If you would like to stop the motor ASAP then you probably braking Resistors to consume the generated power. Normaly this is an option. Rudi

CB,

Your questions are very basic and you seem to have a lot of them. It would be more efficient for you to call the technical specialist from the company where you plan to buy the VFD and ask him these questions. If he can't answer them, then find someone else to buy from. It's also quite possible that he will speak your native language.

This is not meant to discourage you from posting questions here, or asking if the salesman is telling the truth and not just trying to sell you a lot of fancy accessories. It just seems to take a day or more to get a simple concept explained here, and one question leads to another. You could learn the basics a lot more quickly if you could engage in a face to face conversation with a person who understands variable speed drives.

I would also infolve your plant electricians they can provide necessary information such as FLA, amps, rpm, voltage mechanical details to determine ramp rates. whether or not you wish to DC brake or coast to stop etc. As well as explaining the various settings within a VFD. If you wish to see whats involved try downloading a users manual on a vfd. The terminology in them can be daunting but it will prove that if your not careful you can cause problems such as motor failure etc.

CB,

Your questions are very basic and you seem to have a lot of them. It would be more efficient for you to call the technical specialist from the company where you plan to buy the VFD and ask him these questions. If he can't answer them, then find someone else to buy from. It's also quite possible that he will speak your native language.

This is not meant to discourage you from posting questions here, or asking if the salesman is telling the truth and not just trying to sell you a lot of fancy accessories. It just seems to take a day or more to get a simple concept explained here, and one question leads to another. You could learn the basics a lot more quickly if you could engage in a face to face conversation with a person who understands variable speed drives.

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thanks for your advice steve, ok. i'll purchase teh vfd, and do as u said.

I would also infolve your plant electricians they can provide necessary information such as FLA, amps, rpm, voltage mechanical details to determine ramp rates. whether or not you wish to DC brake or coast to stop etc. As well as explaining the various settings within a VFD. If you wish to see whats involved try downloading a users manual on a vfd. The terminology in them can be daunting but it will prove that if your not careful you can cause problems such as motor failure etc.

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thanks mordred, ok then. i'll find out from the vfd manuals.


thanks u all

CB,

I didn't say to buy the VFD first, then start talking to the salesman! It is permissible to talk to a salesman without purchasing anything from him. All the more reason to speak with a person fluent in your native tongue. I believe that a significant portion of the information in all of your posts is lost in translation.

CB,

I didn't say to buy the VFD first, then start talking to the salesman! It is permissible to talk to a salesman without purchasing anything from him. All the more reason to speak with a person fluent in your native tongue. I believe that a significant portion of the information in all of your posts is lost in translation.

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yes, ok steve. thanks again

What do you mean by braking the motor?

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there is a regenerative braking, that feeds back teh power from the result of reversing direction into teh system, is this possible done? that means, teh resistors, could be omitted if the braking is reegen braking> m i rite.> bcos the energy is conserved instead of dissipated in the resistors

please enlighten me

thank u much