The
TPU240 is a turbomolecular pump with a DIN 100 CF-F connector and a front magnetic bearing, thus it can also be mounted horizontally.
It has a rotational speed of
1 kHz
, a pumping capacity of
230 l/s
for nitrogen and can theoretically reach a pressure of
10⁻⁸ mBar
with a rotary vane pump and viton seals, though I don't expect to go below
10⁻⁶ mBar
.
The number of phases is four, it has two hall sensors and temperature sensing elements.
After some testing it was found to have one magnetic pole pair and a Kᵥ of
63 mV/Hz
.
Thus 70 V should be enough to drive it at
1 kHz
.
The coils M1 through M4, connected to the pins A to D correspond to the phases of approximately
0 °
,
90 °
,
180 °
and
270 °
.
They have an inductance of approximately
400 µH
, measured with a
transistor tester.
Phase positions and number of poles was found by painting a dot onto the rotor with permanent marker and then seeing where it rotates to when a current (sourced from a 1.5 V AA battery) is applied.
The connector is presumably a
PT06A-14-19S(025)
, which has a current rating of
5 A
.
Inlet of the TPU240
Side angled view of the inlet
I plan to build a controller rated for 80 V and 10 A with active braking, since otherwise turbomolecular pumps take a while to spin down.
The TPU240 is a turbomolecular pump with a DIN 100 CF-F connector and a front magnetic bearing, thus it can also be mounted horizontally.It has a rotational speed of 1 kHz
, a pumping capacity of 230 l/s
for nitrogen and can theoretically reach a pressure of 10⁻⁸ mBar
with a rotary vane pump and viton seals, though I don't expect to go below 10⁻⁶ mBar
.The number of phases is four, it has two hall sensors and temperature sensing elements.After some testing it was found to have one magnetic pole pair and a Kᵥ of 63 mV/Hz
.Thus 70 V should be enough to drive it at 1 kHz
.The coils M1 through M4, connected to the pins A to D correspond to the phases of approximately 0 °
, 90 °
, 180 °
and 270 °
.They have an inductance of approximately 400 µH
, measured with a transistor tester.Phase positions and number of poles was found by painting a dot onto the rotor with permanent marker and then seeing where it rotates to when a current (sourced from a 1.5 V AA battery) is applied.The connector is presumably a PT06A-14-19S(025)
, which has a current rating of 5 A
.Inlet of the TPU240
Side angled view of the inlet
I plan to build a controller rated for 80 V and 10 A with active braking, since otherwise turbomolecular pumps take a while to spin down. 
