Controller Temperature - Levitronix BPS-200 User Manual

≈ =
T ( T , T ) T ( T
1 4 4
M L A M L
=
T Motor temperatur
M
=
T Ambient temperatur
A
In order to account for thermal variations (like ambient temperature, closed chemical cabinets or corners
without ventilations) and to not significantly reduce the MTBF of the motor it is recommended to keep about
0
20 C safety distance to the absolute thermal limit of the motor (90
of the pump system.

4.4.2 Controller Temperature

Depending on the ambient temperature and the placement of the controller additional cooling may be
required (see Figure 15). To improve cooling of the controller, place the device into a moving air stream. If
the controller is mounted in a compact area or adjacent to additional heat sources (e.g. a 2
ensure that there is sufficient ventilation.
0.0 1.0
75
65
0
[ C]
55
45
35
25
0.0 2.5
Figure 15: Temperature curves of controller LPC-200 vs. flow and speed
The above curves are measurements of the controller temperature at 25
how to calculate the controller temperature for at other ambient temperatures based on this curve.
≈ =
T ( T ) T ( T 25
1 4 2 4 4 3
C A C A
see Figure
PL-4012-00, Rev01, DCO# 09-188
= +
0 0
25 C , T 25 C ) (
4 4 2 4 4 4 4 3
A
see Figure 12
e T
e tg
[gallons/min]
2.0
— Supply = 24 VDC
- - - Supply = 48 VDC
10000 rpm
9000 rpm
5.0 7.5 10.0
(for pumping with pump head LPP-200.1 and motor BSM-1.x)
+ −
0 0
C ) ( T 25 C )
4
A
16
− ⋅
0
T 25 C ) tg
{
L LM
see Figure
=
Liquid temperatur
L
=
Temperatur
LM
0
3.0 4.0
Absolute Temp. Limit
9000 rpm 8000 rpm
8000 rpm
12.5 15.0
[liters/min]
=
T Controller
C
=
T Ambient
A
User Manual for BPS-200
www.levitronix.com
+ −
0
( T 25 C )
A
15
e
e gradient liquid/mot
C) when designing the thermal concept
5.0 6.0
Ambient temp. = 25 C
Specific gravity = 1 g/cm
Viscosity = 0.7 cP
7000 rpm
6000 rpm
17.5 20.0 22.5
0
C ambient. Equation
temperatur e
temperatur e
(Eq. 1)
or
nd
controller)
157
3
137
[F]
117
97
77
25.0
shows
(Eq. 2)
(Eq. 2)
14