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Forum: Transformers, Phase Converters and VFD

Machine voltage issues, three phase via single phase power, and variable frequency drives discussion

  1. Sticky Thread Sticky: Rotary Phase Converter Designs and Plans

    Started by Milacron, 09-21-2006 12:46 AM
    10 Pages
    1 2 3 ... 10
    • Replies: 192
    • Views: 412,437
    06-07-2020, 09:10 PM Go to last post
  2. Sticky Thread Sticky: Motor drum switch wiring references Please look before asking

    Started by JST, 04-13-2020 10:13 PM
    drum, phase, single, step, switch
    • Replies: 1
    • Views: 1,504
    04-13-2020, 10:13 PM Go to last post
  3. Sticky Thread Sticky: Huanyang VFDs.... Banned from discussion

    Started by JST, 08-02-2017 04:05 PM
    banned, huanyang, sold, units, vfds
    • Replies: 0
    • Views: 13,515
    08-02-2017, 04:05 PM Go to last post
    • Replies: 0
    • Views: 8,313
    04-03-2017, 01:11 PM Go to last post
  4. Sticky Thread Sticky: Please keep threads to one subject as much as possible

    Started by JST, 01-10-2016 12:09 AM
    archives, attach, cases, cheap, close, discussion, easy, ends, fast, force, general, instance, means, original, part, pick, plan, post, question, searchable, start, subject, temporarily, thread, vfds
    • Replies: 0
    • Views: 12,326
    01-10-2016, 12:09 AM Go to last post
  5. Sticky Thread Sticky: A reminder.... please make your thread title meaningful

    Started by JST, 02-23-2013 09:31 AM
    • Replies: 0
    • Views: 20,423
    02-23-2013, 09:31 AM Go to last post
  1. Question Regarding step down transformers.

    Started by TheBigLebowski, 09-16-2020 06:41 PM
    phase, shop, transformer, transformers, wye
    • Replies: 4
    • Views: 277
    09-18-2020, 06:59 PM Go to last post
    • Replies: 9
    • Views: 362
    09-17-2020, 11:07 PM Go to last post
    • Replies: 2
    • Views: 128
    09-17-2020, 02:33 PM Go to last post
  2. Using dc capacitors in an ac circuit

    Started by Bob-J-H, 09-07-2020 02:43 PM
    back, caps, circuit, lot, talking
    • Replies: 13
    • Views: 572
    09-16-2020, 10:04 PM Go to last post
  3. Buck Boost Transformer: Wire Connectors?

    Started by 300sniper, 09-15-2020 02:56 PM
    boost, buck, read, transformers, wire
    • Replies: 3
    • Views: 196
    09-15-2020, 10:41 PM Go to last post
  4. VFD deceleration issue - PLEASE HELP !

    Started by TrueBor, 08-29-2020 04:25 AM
    3 Pages
    1 2 3
    lathe, motor, pole, stop, vfd
    • Replies: 40
    • Views: 1,753
    09-15-2020, 10:37 PM Go to last post
    • Replies: 19
    • Views: 591
    09-15-2020, 03:19 PM Go to last post
  5. large pony start RPC

    Started by Grigg, 07-13-2009 12:02 PM
    3 Pages
    1 2 3
    • Replies: 52
    • Views: 8,278
    09-14-2020, 05:18 PM Go to last post
  6. Successful CP-200 Conversions

    Started by smilingjohn, 04-06-2012 09:25 AM
    6 Pages
    1 2 3 ... 6
    • Replies: 104
    • Views: 49,222
    09-14-2020, 05:04 PM Go to last post
  7. Question on a single phase motor repair

    Started by Sweet Dreamer, 09-10-2020 06:53 PM
    control, delay, motor, points, relay
    • Replies: 16
    • Views: 615
    09-13-2020, 07:52 PM Go to last post
  8. O/T - 115v or 208/230v motor Q?

    Started by Terry Keeley, 09-12-2020 10:43 AM
    115v, motor, phase, run, single
    • Replies: 9
    • Views: 500
    09-13-2020, 03:41 AM Go to last post
    • Replies: 2
    • Views: 230
    09-12-2020, 12:15 AM Go to last post
  9. What do contactor labels A.V. and A.R. mean?

    Started by Ixzed13, 09-11-2020 06:25 PM
    • Replies: 0
    • Views: 191
    09-11-2020, 06:25 PM Go to last post
  10. Question on VFDs and Motor Horsepower

    Started by Sweet Dreamer, 09-10-2020 07:01 PM
    lathe, motor, question, running, vfd
    • Replies: 10
    • Views: 398
    09-11-2020, 05:33 PM Go to last post
  11. Buck Boost Transformer, Before or After RPC?

    Started by 300sniper, 09-02-2020 04:41 PM
    2 Pages
    1 2
    buck, motor, rpc, transformers, voltage
    • Replies: 27
    • Views: 1,205
    09-11-2020, 04:50 PM Go to last post
    • Replies: 8
    • Views: 552
    09-11-2020, 03:45 PM Go to last post
  12. Smart Brown 1024 vfd conversion

    Started by beckerkumm, 09-10-2020 08:28 PM
    • Replies: 7
    • Views: 289
    09-11-2020, 02:40 PM Go to last post
    • Replies: 8
    • Views: 405
    09-10-2020, 01:36 PM Go to last post
  13. TECO E510 on a 1200 RPM FRAY mill

    Started by NRDock, 04-14-2019 09:23 PM
    back, change, pmslv, raised, teco
    • Replies: 3
    • Views: 908
    09-07-2020, 07:53 PM Go to last post
  14. High Leg Delta

    Started by edl, 09-04-2020 08:25 AM
    2 Pages
    1 2
    • Replies: 30
    • Views: 910
    09-07-2020, 06:21 PM Go to last post
    • Replies: 1
    • Views: 288
    09-03-2020, 10:54 PM Go to last post
    • Replies: 19
    • Views: 1,194
    09-03-2020, 01:07 AM Go to last post
  15. Prototrak mx2 xyz pro 2000

    Started by Donal13, 09-01-2020 05:00 PM
    • Replies: 11
    • Views: 413
    09-02-2020, 04:58 PM Go to last post
  16. RPC sizing question

    Started by bhigdog, 09-01-2020 11:50 AM
    briefly, harm, motor, rpc, run
    • Replies: 15
    • Views: 460
    09-02-2020, 10:55 AM Go to last post
    • Replies: 3
    • Views: 272
    09-01-2020, 01:34 PM Go to last post
  17. RPC High Leg and Three Phase Motor

    Started by Vladymere gr, 08-23-2020 04:46 PM
    2 Pages
    1 2
    • Replies: 30
    • Views: 1,629
    08-30-2020, 05:17 PM Go to last post
  18. Van Norman #12 has difficulty running higher speeds off static PC

    Started by shaggy, 08-04-2020 12:41 AM
    4 Pages
    1 2 3 ... 4
    • Replies: 63
    • Views: 2,859
    08-30-2020, 11:57 AM Go to last post
  19. VFD or soft start strategy for lathe

    Started by backspace119, 08-25-2020 02:46 PM
    vfd, lathe, start, soft, phase
    • Replies: 7
    • Views: 697
    08-29-2020, 04:50 PM Go to last post
  20. check step up transformer volts & grounding

    Started by Rob F., 08-27-2020 05:01 PM
    ground, input, step, transformer, volts
    • Replies: 9
    • Views: 572
    08-29-2020, 12:24 AM Go to last post
  21. Buck boost transformer sizing

    Started by Grigg, 08-26-2020 04:12 PM
    cleaner, kva, legs, load, transformers
    • Replies: 2
    • Views: 407
    08-26-2020, 09:35 PM Go to last post
    • Replies: 5
    • Views: 733
    08-25-2020, 12:36 PM Go to last post
  22. Drum switch on 220v lathe motor.

    Started by Jonwick, 08-21-2020 11:45 AM
    • Replies: 17
    • Views: 829
    08-24-2020, 01:10 AM Go to last post
  23. C-11G contactor

    Started by Jonwick, 08-21-2020 08:03 AM
    • Replies: 4
    • Views: 318
    08-23-2020, 09:20 AM Go to last post
  24. DC or 3 phase motor for a Lathe

    Started by piedmontg, 08-18-2020 04:24 PM
    2 Pages
    1 2
    lathe, motor, phase, real, single
    • Replies: 39
    • Views: 1,620
    08-21-2020, 07:51 PM Go to last post
  25. Can I Test Old Vacuum Electron Tubes a simple way?

    Started by Richard King, 08-11-2015 05:05 PM
    5 Pages
    1 2 3 ... 5
    • Replies: 96
    • Views: 26,754
    08-21-2020, 07:48 PM Go to last post
    • Replies: 6
    • Views: 469
    08-21-2020, 02:08 PM Go to last post
  26. Wiring old three phase machines

    Started by 8wire, 08-15-2020 12:18 PM
    3 Pages
    1 2 3
    • Replies: 46
    • Views: 2,423
    08-21-2020, 08:37 AM Go to last post
  27. Phase Converter for CNC Lathe

    Started by white84monte, 08-18-2020 04:38 PM
    converter, lathe, phase, power, shop
    • Replies: 11
    • Views: 788
    08-21-2020, 06:51 AM Go to last post
  28. RPC blows adjacent circuits

    Started by rimcanyon, 06-27-2020 08:39 PM
    3 Pages
    1 2 3
    • Replies: 55
    • Views: 4,132
    08-18-2020, 08:05 AM Go to last post
  29. Miller CP-200 208/230v converted to 240v single phase

    Started by CRJarvis, 04-29-2018 03:08 PM
    2 Pages
    1 2
    • Replies: 23
    • Views: 7,199
    08-18-2020, 01:27 AM Go to last post

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