Drive Cage
has anyone aput an ac drive on a slip ring induction motor after shortcircuiting the rotor terminals ?
i plan to put AC drive in crane motors that are currently slip ring motors, since ac drives are made for squirral cage induction motors we can short the rotor terminals and put them? Is there any category of special carne duty ac drives ?
Variable frequency drives VFDs) can be connected to slip ring induction motors with shorted rotor terminals. Because of ringing voltage transients that occur at the waveform switching transition points, VFDs cause voltage stresses on the motor insulation. Motors rated for VFD use are recommended, but older motors can be used. Output reactors or dv/dt filters are recommended for use with older motors. Most VFD suppliers can provide detailed recommendations.
Many suppliers have experience with crane retrofits and can provide information and VFD features for coordinating the VFD operation with friction brake controls etc.
Hard Drive Cage Testing
|
|
[N] DL380 G1 Ultra2 2-bay Center Drive Cage 157007-b21 $1.00 |
|
|
[N] ML530 ML570 Ultra3 6-bay Drive Cage 159231-001 $1.00 |
|
|
[N] 2-Bay Drive Cage /Optical Drive Blank 458751-001 $1.00 |
|
|
Intel AXX6SATADB 6 SATA Drive Hot Swap Cage SC5300 5275 $79.00 |
|
|
Compaq 1850R DL380 SCA Drive Cage 388255-B21 157007-B21 $10.00 |
|
|
HP 250909-001 HOT-PLUG STORAGE DRIVE CAGE – PC $32.98 |
|
|
HP Proliant ML310 G2 Drive Cage w/ backplane 385597-001 $114.99 |
|
|
HP Proliant ML150 G2 Drive Cage 373277-001 370890-001 $74.99 |
|
|
HP/Compaq 387090-001 Drive Cage/Backplane DL380 $5.00 |
|
|
SNT-2131 SATA-II Disk Array 3 Drive Cage RAID Backplane $89.59 |
|
|
HP – Storage drive cage – capacity: 8 hard drives $97.69 Marketing description is not available…. |
|
|
(Price/1)Sup Pro Hy – drive Pump 1600gph W/ Prefilter Screen No Cage $216.20 Price is for 1.EG DANNER MFG – 1600gph HY-Drive PumpMaximum Pumping Height – 17′Current requirements – 1.0 A / 120 WattsAvailable in six additional sizes – 2100gph, 2600gph, 3200gph, 4000gph, 4800gph &6000gphPowerful, efficient hybrid magnetic/direct drive motorEnergy efficient to reduce operating costWhisper-quiet operationSpecifically designed for saltwater and freshwater aquariumsContinuous d… |
|
|
(Price/1)Sup Pro Hy – drive Pump 2100gph W/ Prefilter Screen No Cage $227.29 Price is for 1.EG DANNER MFG – 2100gph HY-Drive PumpMaximum Pumping Height – 22.5′Current requirements – 1.5 A / 190 WattsAvailable in six additional sizes – 1600gph, 2600gph, 3200gph, 4000gph, 4800gph &6000gphPowerful, efficient hybrid magnetic/direct drive motorEnergy efficient to reduce operating costWhisper-quiet operationSpecifically designed for saltwater and freshwater aquariumsContinuous… |
|
|
Broadway: Love & Laughter $12.95 “Broadway: Love & Laughter” is terrific. Singer/actress Eileen Mager performs twenty-three of the greatest songs from Broadway musicals in a way you won’t soon forget. There are some real oldies, as well as more current songs, and everything from tear-jerkers to laugh riots. They have great lyrics (and you’ll understand all the words) and great tunes. She’ll have you laughing and cr… |
|
|
Cooler Master 4 in 3 HDD Module Device – (STB-3T4-E3-GP) $19.16 PRODUCT FEATURES:Convert the three 5.25″ drive bays into a four 3.5″ HDD module with 12cm sleeve bearing cooling fanCompatible with ATX case with three 5.25″ drive baysIdeal for CM Stacker series and other cases… |