V/f: Device-dependent reference point setting

Question:

How do you select the reference point for Lenze inverters?
What must be observed?         
 
Answer:
We have to distinguish between two groups with different reference point selection:
 
Group A
Base frequency setting:
For group A, the base frequency and the rated motor voltage/base voltage must be entered into the codes/parameters provided. No calculation is required. The values must be taken from the nameplate.
 
8400 motec/8400 BL:
C00015 | VFC: V/f base frequency
C00090 | Rated motor voltage
 
 
i510/i550: -> Could be changed!
0x2B01:2 (PAR 302) | Base frequency
0x2B01:1 (PAR 302) | Base voltage
 
Examples:
 
230-V mains voltage:
Motor data entry:
 
8400 motec/8400 BL:
C00015 | VFC: V/f base frequency
C00090 | Rated motor voltage
 
 
i510/i550:
0x2B01:2 (PAR 302) | Base frequency
0x2B01:1 (PAR 302) | Base voltage
 
400-V mains voltage:
Motor data entry:
 
8400 motec/8400 BL:
C00015 | VFC: V/f base frequency
C00090 | Rated motor voltage
 
 
i510/i550:
0x2B01:2 (PAR 302) | Base frequency
0x2B01:1 (PAR 302) | Base voltage
 
 
500-V mains voltage:
Motor data entry:
 
8400 motec/8400 BL:
C00015 | VFC: V/f base frequency
C00090 | Rated motor voltage
 
 
i510/i550:
0x2B01:2 (PAR 302) | Base frequency
0x2B01:1 (PAR 302) | Base voltage
 
Group B:
Base frequency setting:
For group B, the base frequency must be calculated by means of the formula provided in the hardware manual:
Base.png 
The following points are important:
  • VFI: Depending on the device, you must either use 400 V (3-phase) or 230 V (1-phase) to calculate the formula. This is independent of operation at a higher mains voltage, e.g. at 460 V in America.
  • Vrated_MOT: Depending on the type of interconnection, the rated voltage specified on the motor nameplate must be used to calculate the formula.
  •  frated: Depending on the type of interconnection, the rated frequency specified on the motor nameplate must be used to calculate the formula.

 

 
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency -> to be calculated according to the formula
 
 
Examples:
 
230-V mains voltage:
 
200V/50-Hz motor; 1-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 230 V/200 V * 50 Hz = 57.5 Hz
 
200V/60-Hz motor; 1-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 230 V/200 V * 60 Hz = 69 Hz
 
400-V mains voltage:
 
380V/50-Hz motor; 3-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 400 V/380 V * 50 Hz = 52.6 Hz
 
380V/60-Hz motor; 3-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 400 V/380 V * 60 Hz = 63 Hz
 
500-V mains voltage:
 
380V/50-Hz motor; 3-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 400 V/380 V * 50 Hz = 52.6 Hz
 
380V/60-Hz motor; 3-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 400 V/380 V * 60 Hz = 63 Hz
 
480V/60-Hz motor; 3-phase inverter:
8400 StateLine/HighLine/TopLine; 8400 protec:
C00015 | VFC: V/f base frequency = 400 V/480 V * 60 Hz = 50 Hz

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201500706/1/
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