Hioki PW3390 - Page 221

10.6 Calculation Formula Specifications
213
10
10
Chapter 10 Specifications
2. Motor analysis measurement items calculation formulas
Items Setting Units Calculation Formulas
CH A
V (DC Voltage)
N
• m, mN• m, or kN• m common to all mea-
surements (torque)
For Analog DC A [V] × CH A scaling setting
For Frequency
M :Number of synchronous samples, S :Sample (data point) number
CH B
V (DC Voltage)
Hz (Frequency)
For Analog DC
B [V] × CH B scaling setting
Pulse input
r/min (rotation rate)
For Analog DC
B [V] × CH B scaling setting
Pulse input
Pm
N
• m (CH A units)
mN
• m (CH A units)
kN
• m (CH A units)
Calculation is disabled when CH A units are not those specified above, and when CH B units are set to other than r/min.
Slip
Hz (CH B units)
r/min (CH B units)
Select an input frequency (f
1
to f
4
)
1
M
-----As
s0=
M1–

(Measurement freq. – fc setting value) × rated torque setting value)
fd setting value
1
M
-----Bs
s0=
M1–

set no. of poles × pulse frequency
2 × set no. of pulses
*1
si
Polarity sign si is obtained from the rise/fall edge and logic
level (High/Low) of A Phase pulse and B Phase pulse.
2 × 60 × frequency [Hz] (calculated from above Pulse Input value *1)
set no. of poles
2 ×  ×(CH B display value)
60
(CH A display value) ×
2 ×  ×(CH B display value)
60 × 1000
(CH A display value) ×
2 ×  ×(CH B display value)× 1000
60
(CH A display value) ×
Input frequency - |CH B display value|
Input frequency
100 ×
2 × 60 × Input frequency - |CH B display value|× set no. of poles
2 × 60 × Input frequency
100 ×