I suspect everything would be complicated. You need magnetic drive on all the wheels, teflon insulation, and all the magnets for motors would have to run at silly temperatures, or you need a very nice heat exchanger of some kind. Pure titanium radiator
If the magnets in the motor got hot, then you suddenly don't have much power.
I think it would have to be like a titanium tank thread.
Since it would probobly still run at a elevated temp, you lose tons of power in the motor from the magnetic isolation and the increased temperature. Then you need more magnets.
Even if you get tubes to run at ambient for the power supply, you still have magnets, unless it has something new, like high temperature piezo motor drive for the wheels. that might actually be a better idea, since it run at HV from tubes and does not have magnets. But it would still need a really good seal or magnetic isolators from the motor to the wheel, even if the motor does not have a magnet. Piezo motors are very sensitive to corrosion from what I have seen, it relys on uber flat contacts that are clean.
https://www.techbriefs.com/component/content/article/24957-npo-49735I think even if you can get a piezo motor that runs at ambient, you would need a cooled magnetic coupler to transfer force from the hermetic motor. Neodymium totally fails at 300C. YOu have 450C ambient.
Unless you get a shaft seal to work at 500C for the motor in the corrosive enviroment. Then maybe its possible to have not cooled motors that actually let this thing move around at a 450c enviroment, if piezo still functions lol
But this requires a new material
"PI HVPZTs have a Curie temperature of 300°C and can be operated up to a max temperature of 150°C and some cases to 200°C (with high temperature option). In ..."
https://www.researchgate.net/publication/257953339_A_High-Temperature_Double-Mode_Piezoelectric_Ultrasonic_Linear_MotorIt sound like MAYBE we are almost at making a motor that works at that temp. But then there is the shaft seal. something from chemical plant maybe.
because cooling 1 nice camera is possible IMO, with a small titanium heat exchanger with some fancy compressor. the motors are a much much bigger problem. You can get CMOS in there with a 30 watt air conditioner I think. Impressive, but not nearly as impressive as what is required to cool the locomotion.
*****
Maybe it would be a new type of motor, like a phase change sprocket thing. you could arrange phase change actuators radially so they change the center of mass by moving a heavy piston forward to get something to rotate. Or a liquid metal hydraulic motor that uses a MHD as a power source
there is this concept too, but I think its not a rover (sail boat)
https://en.wikipedia.org/wiki/Zephyr_(rover) It needs a NAK hydraulic drive on titanium tank threads powered from its own nucular reactor