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converting slip ring motor to vfd

converting slip ring motor to vfd - steffi-gruebler.de

converting slip ring motor to vfd. Slip ring motor conversion to VSD driven standard . 2016-3-29 Slip ring motor conversion to VSD driven standard squirrel cage ac motor By J van Niekerk, Zest WEG Group Over a number of years slip ring motors have largely been replaced by standard squirrel cage ac induction motors, often in conjunction with ac Variable Speed Drives (VSDs).

converting slip ring motor to vfd - microphonesty.es

converting slip ring motor to vfd. Techno-economic analysis of slip ring motor replaced by standard . standard squirrel cage induction motor with VSD. H Dewi1, F H Induction motor slip ring-type technology has been widely used in industrial as one of the crucial electrical co.

converting slip ring motor to vfd - cakeletraiteur.fr

How To Use Vfd In Slip Ring Motor In Crushing Equipment. Vfd on slip ring "wound rotor" motors Feb 20, 2012· Re: VFDs and Slip-Ring Induction Motors 08/13/2009 8:49 AM Normally for the EOT Cranes when slip ring motors are used with resistance the speed is controlled through master controller motor starts with slow motion and picks up speed ...

Converting Slip Ring Motor To Vfd - kvetinarstvi

Sizing VFD for Slip Ring Motor CR4 Discussion Thread. Dec 22, 2015 If converting a slip ring motor to VFD, you would first need to short the rotor bars, and this would best be done so that the brushes are made redundant, otherwise they will still need to be maintained You would also want to be a bit careful of the condition of the motor as VFDs ...

Sizing VFD for Slip Ring Motor - CR4 Discussion Thread

2015-12-22 · If converting a slip ring motor to VFD, you would first need to short the rotor bars, and this would best be done so that the brushes are made redundant, otherwise they will still need to be maintained. You would also want to be a bit careful of the condition of the motor as VFDs can impose pretty harsh voltage spikes on an old motor's insulation.

Slip ring motor conversion to VSD driven standard

2016-3-29 · Slip ring motors can have many different ratings depending on the duty cycle for which they are specified. If the standard squirrel cage motor is selected purely on nominal power, for example a 37 kW to replace a 37 kW slip ring motor, then the starting torque may not be sufficient. Alternatively, if one is overly Slip ring motor conversion to

Can a slip ring motor run through a variable frequency ...

2016-10-25 · The slip-ring motor has slightly different impedance response to a squirrel cage machine so the VFD control has to allow for this, but I believe most large VFD suppliers have this as standard. The slip-rings need to be short-circuited so the

vfd on slip ring "wound rotor" motors - Variable Speed ...

2008-2-7 · vfd on slip ring "wound rotor" motors - posted in Variable Speed Drives: I am involved in converting a ball mill , which requires a large amount of starting torque, from a slip ring motor driven application to a vfd driven appl. . We have sent the motor to our motor guy to refurbish and interconnect the rotor windings.Is there any advice or similar applications out there that could be helpful.

Could we change Slip-ring Motor to Induction Motor?

An induction motor (sq - cage) driven by VVVF/ VFD system is ideal replacement for slip-ring induction motor. However, the torque requirement / duty cycle of the crusher motor at various stages is important and the VVVF /VFD drive should be able to control the torque /

Using VFD with slip-ring motors - Electric motors ...

2002-11-21 · One thing to remember when putting VFD's onto slip ring motors is that modern VFD's using IGBT's produce a very fast rate of change in voltage. Slip ring motors tend to be older and their insulation system may not be up to the voltage stress that the VFD will subject them too. You may need a VFD with a dV/dt output filter ie incressed cost.

Can a VFD drive a slip ring motor?

2016-10-5 · A slip ring motor is normally not designed for the extreme high du/dt values stressing the winding insulation at VFD drive (fast switching). There is a high risk that partial discharge will break down the winding isolation material causing flash-over if it is not designed for VFD

Converting wound rotor motors to variable frequency

Retrofitting wound rotor motor-based control systems to a VFD will not only provide speed and torque control that is more precise and will also eliminate susceptibility of slip ring commutator ...

Replacement of Slip Ring Motor With 'Squirrel Cage Motor ...

2011-11-5 · The crane is having 4 motions: long travel, cross travel, main hoist, auxilliary hoist. For all above purposes, slip-ring induction motors are used. I want to replace these motors with squirrel cage induction motors run by VFDs. I am choosing the squirrel cage motor with same number of stator poles as that of slip-ring motor.

change Wound rotor motor to VFD fed induction motor ...

2008-6-1 · There are existing 1600HP wound rotor motors driving centrifugal pumps at a water pumping station. There is a push to convert the motor to a VFD driven induction motor. The VFD cost is high. The thought is that reliability would be improved. Also maintenance on the slip rings would go away.

Vfd's And Slip Ring Motors - Variable Speed Drives -

2011-5-26 · Vfd's And Slip Ring Motors - posted in Variable Speed Drives: One for the Boffins, Has anyone had experience in using VFD's on Wound Rotor Motors? We are intending to short out the rotor prior to the Slip rings so as to ensure there will not be any sparking and resistance changes on the rotor circuit. Using a Open Loop Vector drive, we can expect to get up to 200% Torque from a Squirrel cage ...

Use of wound rotor motor with VFD | Automation &

2003-8-14 · I suggest you: 1) determine the reason the slip-ring motor was originally specified; and 2) consider the age of the motor's windings because their insulation will be subjected to steep wave-fronts produced by the VFD. As an aside, in response to Lei's, Sun, Nov 17, 6:16 pm, comments:

Change synchronous motor to induction motor - VSD

Converting a synchronous motor to an induction motor is easily done, to most motors, by shorting the rings, however, you would most likely need to use a properly sized VFD to get the starting torque you need. If you are interested to do such an upgrade you should consider the age of the motor and any other peripherals (gearbox, etc.) in the drive train.

Generate AC with Slip Ring Motor? - practicalmachinist

It has the standard 9 wires for the field and three wires from the slip rings. In addition to the HV LV wiring diagram is a Y diagram. I need enough 240V 3 phase to run a 2 hp hoist motor and I can use my Lister 6/1 to drive the generator. If the slip rings are irrelevant and it

How to Select a Variable Frequency Drive (VFD)? | ATO

According to the speed formula, speed = time (60 seconds) × frequency (50Hz) divided by the number of pole pairs. Here is a sample of ATO 200w brushless DC motor. The motor's rated speed is 3000 rpm, the pole pairs is (3000 rpm)/ (60 seconds × 50Hz)=1. That is to say, this motor has two poles. Selection of VFD

Slip Ring Motors - LM Photonics

Slip Ring or Wound Rotor Motors. The slip ring or wound rotor motor is an induction machine where the rotor comprises a set of coils that are terminated in sliprings to which external impedances can be connected. The stator is the same as is used with a standard squirrel cage motor. By changing the impedance connected to the rotor circuit, the ...

how to use vfd in slip ring motor in crusher application

2021-4-29 · Slip ring motor conversion to VSD driven standard squirrel. Each slip ring motor has a resistance value that when connected to the rotor will result in a starting torque of 100%. This value is known as K. The value for K is different for each slip ring motor. Using the motor

how to use vfd in slip ring motor in crusher application

Roller Mill Torque Speed Curves Ball Mill Vfd Motor vfd jaw crusher application vfd on slip ring "wound rotor" motors . Get Price; Slip ring motor conversion to VSD driven . Slip ring motor conversion to VSD driven standard squirrel Each slip ring motor has a resistance value that when connected to • Application o Crusher. Get Price

change Wound rotor motor to VFD fed induction motor ...

2008-6-1 · There are existing 1600HP wound rotor motors driving centrifugal pumps at a water pumping station. There is a push to convert the motor to a VFD driven induction motor. The VFD cost is high. The thought is that reliability would be improved. Also maintenance on the slip rings would go away.

How To Use Vfd In Slip Ring Motor In Crusher Application

How To Use Vfd In Slip Ring Motor In Crusher Application. Nov 21 2002nbsp018332Yes you can replace the slip ring starter with shorted rings and a vfd It is quite common to short the rings on the rotor itself and remove the brush assembly The torque will not necessarily be as high as can be achieved by a slip ring starter but if you really need to have greater than 120 torque at the lower speed ...

VFD through a slip ring? | Mike Holt's Forum

2009-1-19 · I am trying to put together a proposal for updating some machinery at the plant I work for. One of our machines has four each 5, 3, and 2 Hp 240 VDC electric motors running through a slip-ring. This is the original design of the machine although we have replaced the original slip-ring. The 5...

Starting torque of slip ring motor and induction motor ...

2016-12-19 · Old motors don't like this as if the insulation is not rated for a VFD, particularly if it is an old motor. Also if you change a 22kW Slip ring motor for a 22kW induction motor it will not work as the starting (breakout torque) may not be sufficient. To ensure our crane had the required breakout torque, we went to a 45kW motor.

Vfd's And Slip Ring Motors - Variable Speed Drives -

2011-5-26 · Vfd's And Slip Ring Motors - posted in Variable Speed Drives: One for the Boffins, Has anyone had experience in using VFD's on Wound Rotor Motors? We are intending to short out the rotor prior to the Slip rings so as to ensure there will not be any sparking and resistance changes on the rotor circuit. Using a Open Loop Vector drive, we can expect to get up to 200% Torque from a Squirrel cage ...

Generate AC with Slip Ring Motor? - practicalmachinist

It has the standard 9 wires for the field and three wires from the slip rings. In addition to the HV LV wiring diagram is a Y diagram. I need enough 240V 3 phase to run a 2 hp hoist motor and I can use my Lister 6/1 to drive the generator. If the slip rings are irrelevant and it

Variable Frequency Drives | ATO

VFD, short for Variable Frequency Drive, is an energy saving device for controlling AC motor speed by converting mains power supply AC - DC - AC with variable frequency & voltage output. ATO sells VFD's power range from 1/2hp to 300hp in low prices,

How to Select a Variable Frequency Drive (VFD)? | ATO

According to the speed formula, speed = time (60 seconds) × frequency (50Hz) divided by the number of pole pairs. Here is a sample of ATO 200w brushless DC motor. The motor's rated speed is 3000 rpm, the pole pairs is (3000 rpm)/ (60 seconds × 50Hz)=1. That is to say, this motor has two poles. Selection of VFD