Powering up, Heat dissipation, Gold drum hv (high voltage) thermal data – ElmoMC Gold Line Digital Servo Drives-Gold Drum HV User Manual
Page 84: Powering up 4.13. heat dissipation
Gold Drum HV Installation Guide (EtherCAT and CAN)
Installation
MAN-G-DRUMHVIG-EC (Ver. 1.202)
84
4.12. Powering Up
After the Gold Drum HV (High Voltage) has been mounted, check that the cables are intact.
The Gold Drum HV (High Voltage) servo drive is then ready to be powered up.
Caution: Before applying power, ensure that:
1.
The DC supply is within the specified range.
2.
The proper plus-minus connections are in order
3.
The VN- is not connected to the PE or to the Neutral, when working with a
non-isolated power supply.
4.13. Heat Dissipation
For full power output capability the Gold Drum HV (High Voltage) is designed to be mounted on
an external heatsink. It is highly recommended that the “Wall” on which the Drum is mounted
will have heat dissipation capabilities. The Gold Drum HV (High Voltage) at “free air convection”
(without an additional heatsink) can dissipate around 12 W for 40°C ambient temperature and
not exceeding 80 °C on the heat sink.
When “Free Air Convection” is sufficient for the application it is recommended to leave
approximately 10 mm of space between the Gold Drum HV (High Voltage)'s heat sink and any
other assembly.
For more information, refer to Elmo's application note: Drum HV Thermal Management
When attaching to an external heat-sink, it is recommended to use N5 surface treatment and
thermal foil or smearing thermal compound.
For more details, refer to Elmo's Drum HV Heat Sink Installation Guide,
P/N MAN-G-DRUMHVHSIG.
4.13.1. Gold Drum HV (High Voltage) Thermal Data
•
Free air convection thermal resistance (θ): Approximately 7 to 8°C/W.
•
Thermal time constant: Approximately 40 minutes/ 2400 seconds (thermal time constant
means that the Gold Drum HV (High Voltage) will reach 2/3 of its final temperature after 40
minutes).
•
Self-heat dissipation capability (no external heat sink): 20 W for 40°C/W temperature rise.
•
Shut-off temperature: 86 to 88°C.
•
The thermal resistance when connecting to an external heat sink using a thermal
conductive compound/foil. By proper smearing of the surface a significant improvement of
the thermal resistance is achieved: 0.03°C/W.