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Technical data and characteristics 14.1 Explanations of the formula abbreviations
nMAX,MMAX
nMAX,0
M0
Maximum speed up to which the motor can deliver the maximum torque MMAX.
Torque for speed n = 1 [rpm] at which the load and power loss are still evenly distributed across all three motor lines.
I0 | Current (rms value) of the motor at torque M0 and speed n = 1 [rpm]. |
M0* | Thermal static torque when the current is unevenly distributed across the three |
| motor lines. An uneven current load occurs in the following operating modes: |
| ∙ Standstill |
| ∙ Operation with short cyclic rotations (< 1 pole pitch) |
| ∙ For n << 1 [rpm] |
| Since the saturation effect can be disregarded for the rated current, the |
| following applies (approximately): |
I0* | Thermal stall current (rms value) of the motor at M0*. The following applies: |
Physical constants
kT,20
kE
kM,20
tTH
Motor torque constants at a rotor temperature of 20 °C (refers to the lower linear range of the
Voltage constants for calculating the mutually induced
Motor constant at a winding temperature of T = 20 °C.
The motor constant kM(T) may be calculated for other temperatures: kM(T) = kM,20 ∙ [1 + α(T – 20 °C)]
with temperature coefficient α = − 0.001 1/K for magnets kM(T) = kM,20 ∙ [1 - 0.001 ∙ (T – 20 °C)]
Thermal time constant of the motor winding. This is derived from the temperature characteristic in the winding with a sudden load and constant current. See diagram below. When the time tTH has elapsed, the motor winding reaches approximately 63% of its final temperature TGRENZ if thermal protection was not active prior to this.
1FW6 | 199 |
Configuration Manual, 05/2009, |