User Manual for BFS-i06
www.levitronix.com
PL-3502-00, Rev00, DCO# 21-249
10
•
Input Power Limitation:
An optional input power limit may be set via
Levitronix
®
Service Software
or
Modbus protocol. If set, actual acceleration rate and/or maximum speed are reduced dynamically such
that the specified limit is not exceeded (±10 W tolerance). The extent to which they are reduced
depends on the power limit as well as the operating point. The dashed line in
example for 120 W at operating point with maximum power consumption. The fan accelerates with
8000 rpm / s up to 5000 rpm, then gradually reduces the acceleration rate to prevent further increase
in input power. The maximum reachable speed in this operating point at 120 W input power is around
10500 rpm (see also steady state consumption,
3.1.2 Power Supply
It is highly recommended to evaluate used power supplies under demanding operating situations like fast
braking from maximum speed and during power on and take-off of the fan rotor.
The power rating of the supply may be chosen according to the desired operating point / maximum speed /
number of fans per supply
shows a selection of power supplies tested at
Levitronix
®
with according speed and/or input power
limitations. Please note that only the general functionality of the
BFS-i06
in combination with the given supplies
was tested, and no recommendations in terms of reliability, efficiency, certifications, cost effectiveness or
similar are given.
Manufacturer
Article Name Characteristics
Value / Feature
Recommended Limits
Traco Power
TIB 480-148
Voltage Input / Output
85
– 264 V AC (auto. detection) / 48 V DC
- No limit required (up to 2 fans per power supply)
- Example limits for 3 fans per power supply:
Input power limit 230 W (peak)
Speed limit 11000 rpm (continuous)
Power Output continuous / peak
480 W / 720 W for 4 s
Certification / Standards
CB, UL, CSA, Semi F47
TDK Lambda
HWS300-48
Voltage Input / Output
85
– 265 V AC (auto. detection) / 48 V DC
- No limit required (1 fan per power supply)
- Example limits for 2 fans per power supply:
Input power limit 150 W (peak & continuous)
Speed limit 11000 rpm (continuous)
Power Output
336 W
Certification / Standards
CB, UL, CSA, Semi F47
Traco Power
TIB 240-148
Voltage Input / Output
85
– 264 V AC (auto. detection) / 48 V DC
- No limit required (1 fan per power supply)
- Example limits for 2 fans per power supply:
Input power limit 170 W (peak)
Speed limit 10000 rpm (continuous)
Power Output continuous / peak
240 W / 360 W for 4 s
Certification / Standards
CB, UL, CSA, Semi F47
Traco Power
TSP-600-148-M
Voltage Input / Output
85
– 264 V AC (auto. detection) / 48 V DC
- No limit required (1 fan per power supply)
- Example limits for 2 fans per power supply:
Input power limit 290 W (peak & continuous)
No Speed limit
Power Output
600 W
Certification / Standards
CB, UL, CSA, Semi F47
TDK Lambda
RWS600B-48
Voltage Input / Output
85
– 265 V AC (auto. detection) / 48 V DC
- No limit required (1 fan per power supply)
- Example limits for 2 fans per power supply:
Input power limit 290 W (peak & continuous)
No Speed limit
Power Output
600 W
Certification / Standards
CB, UL, CSA, Semi F47
Cosel
PJA1000F-48
Voltage Input / Output
85
– 264 V AC (auto. detection) / 48 V DC
- No limit required (up to 3 fans per power supply)
- Example limits for 4 fans per power supply:
Input power limit 250 W (peak & continuous)
No Speed limit
Power Output
1008 W
Certification / Standards
CB, UL, CSA
Traco Power
TIB 240-124
Voltage Input / Output
85
– 264 V AC (auto. detection) / 24 V DC
- No limit required (1 fan per power supply)
(Auto. limit 8000 rpm, if 24 V DC is detected)
- Example limits for 2 fans per power supply:
Input power limit 170 W (peak)
No Speed limit (auto. limit 8000 rpm)
Power Output continuous / peak
240 W / 360 W for 4 s
Certification / Standards
CB, UL, CSA, Semi F47
Table 4: Specification of tested power supplies
Additionally tested and passed, but discontinued by manufacturer: Cosel PLA600F-48 (600 W)
The following power supplies were tested but failed to recover the DC voltage quick enough during fast braking
and accelerating tests, triggering a shutdown to error state on the fan:
TDK-Lambda RWS300B-48 / Cosel PJA300F-48
3.1.3 Inrush Current
The
BFS-i06
bearingless fan relies on the inrush current limiter of the power supply and does not have a built-
in inrush current limiter. Therefore, high inrush currents may occur if the fan is directly connected to an already
powered DC socket. These high inrush currents might disturb certain power supplies.
A peak value of 150 A with an I
2
t value of 2.9 A
2
s was measured by hot-plugging the BFS-i06 with 5 m cable
length to a 480 W power supply. It is therefore recommended to connect the bearingless fan to the power
supply BEFORE powering up the supply.
