For certain scenarios in the fields nuclear power or scientific research, we are confronted with irriadated environments (environments subjected to high levels of radiation, especially gamma rays). This type of environment means it's impossible to use industrial-grade motors and rotor angle measurement systems, as they will disintegrate sooner or later, due to the effects of radiation on the non-metallic parts. For situations like this, MACCON has designed and built a radiation-hardended motor, based on stepper motor technology. The motor is available with or without a rotor angle measurement system (resolver feedback) and can therefore be operated in closed loop or open loop mode.
In the image on the right-hand side, the version with resolver feedback can clearly be seen (additional connector for feedback cable).
Contact us today to talk to an experienced MACCON engineer!
The key features of the closed-loop version (with resolver) are as follows:
The key features of the open-loop version (without resolver) are as follows:
The key features of the resolver
The following diagram shows the torque-speed curve of the radiation hardened motor. Certain combinations of speed and torque determine will determine which continuous output mechanical power is possible e.g.
2.7Nm @ 100 rpm results in approx. 27W
2.9Nm @ 150 rpm results in approx. 43W
1.75Nm @ 400 rpm results in approx. 70W
Thus, for linear motion applications (e.g. when the motor is used to drive a screw), the speed-torque combination can be selected to match the screw pitch and the desired force and linear speed by setting the corresponding values in the stepper drive electronics.