72
Motor Cooling
Motor cooling will be dependent upon motor selection. Premium efficiency motors will generally provide cooling from a shaft
mounted fan. Typical motor type would be Totally Enclosed Fan Cooled (TEFC). Motors of this type should use a maximum turndown
of 10:1 as low speed operation leads to inefficient fan cooling, resulting in premature bearing and winding failure. Inverter Duty and
Vector Duty motors are designed to be used for lower speed (higher turndown) applications and generally are Totally Enclosed Non
Ventilated (TENV). Cooling is provided via convection and a large heat sinking motor enclosure.
Motor to Controller Cable Distance
Motor to controller distance in all cases should be minimized. AC drive motor control waveforms are formed from a DC bus and
are “chopped” to create an AC control waveform. These waveforms create motor wiring high voltage spikes. These spikes are made
worse with longer cabling (due to impedance mismatch and the corresponding reflected waveform, dv/dt). These reflected waveforms can
easily double the voltage seen by the motor windings.
Cable Length
Minimum Required Motor Turndown Rating
MPC VECTOR to motor
less
than 25
feet (7.6 meters)
Use ratings guidelines in chart above
MPC VECTOR to motor
greater
than 25 feet (7.6 meters)
4:1 or 10:1 turndown
20:1 turndown
Must use 10:1 inverter duty
rated motor
Consult factory
NOTE: the maximum pump to controller distance is 100 feet (30.5 meters). If longer distances are required, please contact the
factory. Line and load reactors can be utilized to allow operation over longer distances.
Содержание Pulsafeeder MPC Vector
Страница 6: ......
Страница 14: ...8 Figure 1 3 Closed Loop Control Feedback Block Diagram Figure 1 4 Closed Loop Flow Calibration Curve...
Страница 43: ...37 This page is intentionally left blank...
Страница 73: ...67 Continues next page...
Страница 80: ...74 16 Menu Maps...
Страница 81: ...75...
Страница 82: ...76...
Страница 83: ...77...
Страница 84: ...78...
Страница 85: ...79...
Страница 86: ...80...
Страница 87: ...81...
Страница 88: ...82...
Страница 89: ...83...
Страница 90: ...84...
Страница 91: ...85...
Страница 92: ...86...
Страница 93: ...87...
Страница 94: ...88...
Страница 95: ...89...
Страница 96: ...90...
Страница 97: ...91...
Страница 105: ...99 Figure 8 Handheld Remote...
Страница 112: ......
Страница 113: ......
Страница 114: ...and Keypad Functionality BULLETIN No IOM MPCVector UMPC 11 201010 Rv A...