Parker TM Series, Техническое руководство

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11 - PVD 3622_GB_TM_January 2014.Docx
3.
TECHNICAL DATA
3.1. Motor selection
3.1.1. Altitude derating
From 0 to 1000 m : no derating
From 1000 to 4000 m : torque derating of 5% for each step of 1000 m for TMW
From 1000 to 4000 m : torque derating of 10% for each step of 1000 m for TMA
3.1.2. Temperature derating
3.1.2.1. Natural cooled motor
The maximal temperature for natural cooling is 40°C. But, it is possible to increase a
little bit the ambient temperature above 40°C, with a torque reduction. The following
formula gives an indicative about the torque derating at low speed. But in any case
refer to PARKER technical department to know the exact values
At low speed the torque derating is given by the following formula for an ambient
temperature > 40°C.
C
C e temperatur Ambient C
derating Torque

  

105
) _ 145 (
* 100 [%] _
At high speed, the calculation is more complex, and the derating is
much more important.
Please refer to PARKER to know the precise data of Torque derating
according to ambient temperature at high speed for a specific motor.
Illustration:
Only for example given for the TMA208L :
75
80
85
90
95
100
105
25 30 35 40 45 50 55 60
T
o
rq
u
e der
atin
g
[%
]
Ambiant temperature [
°
C]
Torque derating at low speed [%]
Torque derating at high speed speed [%]