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  1. You might consider buying a phase converter box...

    You might consider buying a phase converter box for your 7.5 hp motor, they are reasonably priced and have the correctly rated parts.

    7.5Hp Rotary phase converter control panel 230vac
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    Step up transformer can be used to go from 240 to...

    Step up transformer can be used to go from 240 to 480 prior to the VFD. There are a few VFDs sold in the UK that will step up 240 to 480VAC.
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    Not sure the Reeves drive would hold up to 2X its...

    Not sure the Reeves drive would hold up to 2X its rated speed or higher running the motor to 120 Hz.So I assume that approach would remove the Reeves drive and use a fixed set of drive pulleys....
  4. Recommendations vary, also sometimes a...

    Recommendations vary, also sometimes a non-metalic enclosure may be used so one cannot use a strain relief shield ground. I typically use a star ground or grounding bar attached to the metal back...
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    The power loss through the Reeves trial will be...

    The power loss through the Reeves trial will be minimal in relationship to the power loss of running a motor at 1/3 to 1/4 its base speed to achieve the same spindle RPM. Although torque is flat...
  6. Unfortunately 10 kHz is the max in sensorless...

    Unfortunately 10 kHz is the max in sensorless vector, which is surprising. If you run in V/F I would start with the factory defaults and see if you get an error. Performance will be worse below...
  7. It should not make any difference with single...

    It should not make any difference with single phase input, your are just paralleling the diodes for that particular leg/phase so there is no phase shift nor can I see how it would effect the ripple...
  8. There are quite a few 56Y frame motors that might...

    There are quite a few 56Y frame motors that might be adapted to your needs, not knowing the specs on your current motor makes it a bit sketchy as to recommendations. AO smith makes 3 phase pool pump...
  9. You would need to up size (2 Hp 3 phase input)...

    You would need to up size (2 Hp 3 phase input) your VFD to handle single phase input, unlikely you will find a true single phase input VFD for this voltage. If you have been running a 3 phase input 1...
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    With air compressors running off of a VFD, stop...

    With air compressors running off of a VFD, stop Mode selection I typically recommend is a free run stopping w/o electronic braking, this disconnects the output section of the VFD and the compressor...
  11. To access the full menu you must first change the...

    To access the full menu you must first change the following parameters:
    1. Change B037 to "00" for full display of all functions. You must press both the up and down arrows to access single-digit...
  12. If you did a factory reset and did not put in all...

    If you did a factory reset and did not put in all the motor parameters then it could be an issue, the factory defaults will be different then your motor. See 02 Motor parameters (page 4-10, 4-38) and...
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    I use a series of TVSS/noise filtering components...

    I use a series of TVSS/noise filtering components between the service entrance and each machine, one at the service entrance, at the branch circuit panel and then a combination TVSS/noise filter at...
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    I would look at the Baldor L1430T, RPM is 1725,...

    I would look at the Baldor L1430T, RPM is 1725, single phase, 20.6 amps @230VAC. Doesn't pay to add VFD since since single phase motors are readily available, reasonably priced and a simple install....
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    I much prefer 3 phase for the lathe, you get...

    I much prefer 3 phase for the lathe, you get better surface finish, less issues with the start/stop cycles killing the start capacitor, variable speed to dial in the sweet spot, electronic braking,...
  16. The limitation is not necessarily the bearing...

    The limitation is not necessarily the bearing itself, but the lubrication, loading and dissipation of heat. Typical splash lubrication lathes max out at around 2500 RPM, but heat buildup and getting...
  17. Thread: delta EL VFD

    by mksj
    Replies
    5
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    632

    So you are close to the limit rating of the VFD...

    So you are close to the limit rating of the VFD which is a FLA=17.0A, this sometimes may be exacerbated when using an RPC to provide 3 phase power as some have suggested some derating is required. I...
  18. Thread: delta EL VFD

    by mksj
    Replies
    5
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    632

    The manual download is here:...

    The manual download is here: http://www.realimpeks.co.rs/download/delta_vfd_el.pdf
    YouTube

    On page 4-73 set them motor rated current and no load current. If you are getting a current overload...
  19. Unlikely to need to go to 1800 RPM, I have only...

    Unlikely to need to go to 1800 RPM, I have only used the higher speeds for polishing. typically turn at speeds under 1400 RPM. Also depends on what cutting tools you are using, carbide inserts...
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    The major limitation with the Teco L510 is the...

    The major limitation with the Teco L510 is the lack of a braking resistor on the 120/240VAC versions. OK for the basics and most people can set it up easily. I have had a few people who had motor...
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    VFDs do not power machines, they power the motor...

    VFDs do not power machines, they power the motor directly. So if you desire is to provide 3 phase to a machine and expect it to be plug and play, you need an RPC or a PhasePerfect converter,...
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    Do not see a reason to use a contactor unless you...

    Do not see a reason to use a contactor unless you want it to turn on/off the system. usually used as more of an interlock for an external switch and/or a thermal switch. I do not routinely use them,...
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    I assume you are not running a PM type motor,...

    I assume you are not running a PM type motor, just a standard 3 phase motor so you most likely have the wrong motor parameters.as the fault is for a PM motor. Without seeing what is programmed it is...
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    Conversion from three phase power amperage to...

    Conversion from three phase power amperage to single phase, is to multiply three phase amps by ~1.5-1.7. There are specific calculations, it may run on something less but 30A is way too light for...
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    Unclear from the schematic, looks like it is...

    Unclear from the schematic, looks like it is indicated the input voltage is (110VAC) and output is 24VAC for the contactors.

    If you have a voltmeter you can probe the voltages. Voltages also...
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