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Version
08.2017 www.dunkermotoren.com
Maximum phase
temperature
Maximum phase temperature is the maximum operating temperature for the motor phases. It is limited to
provide a safe operating temperature for the magnets.
R
thphase-houslng
R
thphase-houslng
is the temperature rise from the motor housing to the motor phases for an input power of 1 watt to
the motor. The motor is not moving, there is no forced cooling and no additional heatsinking.
R
thhousing-ambient
R
thhousing-ambient
is the temperature rise from ambient temperature to the motor housing for an input power of 1 watt
to the motor. The motor is not moving and there is no forced cooling. It is quoted with and without the addition of
a 25 x 25 x 2.5 cm heatsink plate mounted with thermal grease to the mounting surface of the motor.
Thermal time constant
Thermal time constant is the time taken for the motor phases to cool to 36.8% of the difference between motor
phase and ambient temperatures when there is no current flowing, the motor is not moving there is no forced
cooling and no additional heatsinking.
8.3 TERMS AND ABBREVIATIONS (CONTINUED)
