Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011 L 133
8400 StateLine C | Reference manual
Motor control (MCTRL)
V/f characteristic control (VFCplus)
Note!
87-Hz operation
4-pole asynchronous motors which are designed for a rated frequency of f = 50
Hz in star connection can be operated in delta connection when being constantly
excited up to f = 87 Hz.
• Advantages:
– Higher speed-setting range
– 73% higher power output in case of standard motors
• Motor current and motor power increase by the factor .
• The field weakening range starts above 87 Hz.
• Generally, this process can also be used with motors which have different
numbers of pole pairs. In case of 2-pole asynchronous motors, the mechanical
limit speed must be maintained.
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