Sunpower Inc. CryoTel
MT Operating Instructions version 4
16
available from Mouser Electronics, part numbers 571-14806990 and 571-3505501
respectively).
b.
Note: Use a suitable connector for the power supply such as the same AMP Mate-
N-Lok® plug housing used for the cryocooler power cables, AMP part number 1-
480698-0 with AMP universal connector socket, 350550-1.
c.
The controller has a startup sequence that positions the piston in the axial center.
This sequence takes approximately 7-10 seconds once the controller is turned on.
d.
The controller then applies a 60 Hz AC voltage to the motor, creating the oscillating
motion of the piston that begins the cooling process.
e.
The controller increases the power input to the cryocooler based on cold end
temperature and predetermined time constants. The maximum draw by the
controller is approximately 100 W
E
.
4.
Allow cold tip temperature to stabilize at desired cold end temperature
a.
Proper operation of the CryoTel MT requires a minimum loading of 2 Watts. If
minimum load requirements are not met, the stabilized temperature will be below 77
K.
Figure 13: CryoTel MT Control Board
+24V
Positive (red lead)
input is fused
Temperature
sensor
Serial
Communications
Connector
Output Power
Orange wire to +
Motor Terminal
15 Amp fuse
