Control voltage output with a relay

Hello to all.
I write my first post on the forum because I need help and confront someone.

I want to build, with Arduino, an electromechanical relay control system with excitation voltage 34.6V (DC) and de-excitation 17.1V. The relay must remain powered for about 2 seconds at 36V (the time to power a motor and make the latter take a shot) and then switch to 18V for a time of up to several minutes (to keep the motor in position); the rest of the time the relay is not powered. The relay + motor assembly has a resistance measured at 20 ° C of 3.5 ohms.
I searched for relays that run continuously at 36V at 10A, with obviously a command voltage of 5V (to be controlled by Arduino), but it seems practically impossible to find them holding up beyond 30V DC (insufficient to excite the relay).

The only card I found is a DC motor control system with PWM regulation; it would also be interesting because I also have to be able to reverse the polarity of the 36V and this controller does it.
This is the link to the product on Amazon:
https://www.amazon.it/TOOGOO-H-Bridge-controllo-potenza-IRF3205/dp/B0793LSH3D/

The doubts I have are:

  1. how well does the electromechanical relay (70) hold a phase-modulated 18V voltage (which is therefore not constant 18V but 36V for half the time and 0V for the other half)? I can trust?
  2. Can the product I have posted be controlled by Arduino Uno?
  3. Is there a better solution considering the data I have provided (if you need others, ask me)? How would you build it?

Thanks in advance for the help.

Good day!

Hello RubrumClausius,
Welcome to the forum.

Would I be correct in thinking that Italian is your native language, not English? I ask because I have read your post several times and I am struggling to understand what you are really asking. Much of what you say doesn't make much sense and I cannot tell if that is because you don't really understand what you are asking about or if it is because the translation to English isn't very good. Maybe someone will come along with an answer for you, but if they don't then I suggest you find the Italian section of the forum and ask in your native language.

In bocca al lupo.