D1-N Series Servo Drive User Manual Protection Function
8-10 HIWIN MIKROSYSTEM Corp.
8.5.2 Software over temperature protection
In addition to motor over temperature protection, D1-N servo drive also provides software over
temperature protection for AC servo motor. The estimated temperature is obtained by evaluating the
current output from the servo drive. If the estimated temperature reaches the threshold of the servo drive,
error message “Soft-thermal threshold reached” appears. Then the servo drive executes emergency stop
procedure and disables the motor. Select Soft-thermal accumulator in Quick view to check the current
estimated temperature.
8.5.3 Servo drive over temperature protection
D1-N servo drive is able to detect servo drive over temperature. When the temperature of the servo drive
reaches 80
o
C, error message “Amplifier over temperature” appears and the motor is stopped. Select
Amplifier temperature in Quick view to check the current temperature of the servo drive.
8.6 Overvoltage protection
When motor decelerates, it generates energy. The energy returns to the capacitors of the servo drive.
When the returned energy exceeds the capacity of the capacitors, regenerative resistor must be installed
to protect the servo drive by absorbing the returned energy. For D1-N-09/18/36 servo drive, the voltage
threshold for activating regenerative resistor is 390 Vdc; the voltage threshold for deactivating
regenerative resistor is 380 Vdc. For D1-N-90 servo drive, the voltage threshold for activating
regenerative resistor is 735 Vdc; the voltage threshold for deactivating regenerative resistor is 695 Vdc.
Regenerative resistors used in HIWIN standard products are listed in table 8.6.1. Connect them parallelly
or serially according to your need.
Table 8.6.1
Regenerative Resistor
Model
HIWIN Part Number Resistance Rated Power/Peak Power
RG2 050100700009 120 Ω 300 W/1,500 W
RG3 050100700008 50 Ω 150 W/750 W
RG4 050100700019 50 Ω 600 W/3,000 W
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