Hydrogen applications for turboexpander machines

An apparatus comprising:

• a three-phase permanent magnet synchronous electric generator comprising:
• a fluid inlet configured to receive hydrogen gas at a first pressure,
• a turbine wheel configured to expand the hydrogen gas and rotate in response to expansion of the hydrogen gas flowing into an inlet of the turbine wheel and out of the outlet of the turbine wheel,
• a rotor coupled to the turbine wheel and configured to rotate with the turbine wheel,
• a stationary stator, the three-phase permanent magnet synchronous electric generator to generate three-phase alternating current upon rotation of the rotor within the stator, and
• a fluid outlet configured to output the hydrogen gas at a second pressure less than the first pressure;
• and
• a power electronics system electrically connected to an electrical output of the three-phase permanent magnet synchronous electric generator and to receive three-phase alternating current from the three-phase permanent magnet synchronous electric generator.