Derating Conditions; Introduction; Forced Cooled Systems, Ny4120 - Bosch rexroth NYCe 4000 Hardware Manual

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Environmental Conditions
17.5

Derating Conditions

17.5.1

Introduction

17.5.2

Forced cooled systems, NY4120

Bosch Rexroth AG R911337671_Edition 18
NYCe 4000 Multi-axis motion control system Hardware Sys‐
Overvoltage category: II.
Maximum altitude: 4000 m.
The NYCe 4000 system can be used as a convection cooled system.
However, this will limit the maximum current to the motors because of the
heat dissipation in the drive modules. In a practical situation not all motors
need high power and do not need full power at the same moment. Since
forced cooled systems are not always possible, the graphs give more insight
in the possibilities of convection cooled systems at a given environmental
temperature.
The NY4053 system housing is used during the measurements, except for
the measurements of the NY4125 drive module. The NY4063 system
housing is used during the measurements of the NY4125. Other drive
modules and system housings will have similar characteristics.
The NYCe 4000 system can be installed with a standard fan unit with 3 fans
each producing an airflow of 11.3 m
motors are used with motor currents higher than 2 A rms and/or the
environmental temperature is higher than 35 °C in a full system configuration.
When five NY4120 drive modules are used in the NY4053 system housing,
you can build the maximum configuration with 10 axes.
current for 10 axes (5 NY4120 drive modules) and all digital outputs at 1 A
load with 3 fans (airflow 11.3 m
on page 218 shows the situation when all 10 motors ask continuously the
same motor current and all 20 digital outputs are driving a load of 1 A
continuously. Under these conditions the maximum motor current is 7 A rms
at an environmental temperature of up to 48 °C. Measurements indicate that
7 A rms is also possible up to the maximum supported environmental
temperature of 55 °C, if fans are used producing an airflow of 20 m
8
6
4
2
0
0 10
Fig. 17-1: Max. motor current for 10 axes (5 NY4120 drive modules) and all
digital outputs at 1 A load with 3 fans (airflow 11.3 m
environmental temperature
3 /hr. The fan unit is strongly advised if
3 /hr) installed vs. environmental temperature"
20 30 40
Environmental temperature (°C)
tem Manual
fig. 17-1 "Max. motor
/hr.
3
50 60 70
/hr) installed vs.
3