Aftertreatment heater power electronics

A system, comprising:

• a prime mover structured to generate power for a mobile vehicle;
• a power converter structured to receive a portion of the generated power, and to provide configured electrical power to an aftertreatment heater device configured to selectively heat an exhaust fluid of the prime mover;
• at least one aftertreatment component positioned downstream of the aftertreatment heater device, and configured to treat at least one constituent of the exhaust fluid;
• and
• a controller, comprising:
• an operating conditions circuit structured to interpret an operating parameter of at least one of the power converter, the aftertreatment heater device, the prime mover, or the exhaust fluid;
• a heater management circuit structured to determine a heating power value in response to the operating parameter, wherein the heater management circuit is further structured to determine the heating power value to modulate a current in an electrical conduit in response to a voltage of the configured electrical power being an off-nominal voltage, wherein the off-nominal voltage comprises a value above the voltage of the configured electrical power;
• and
• a heater control circuit structured to provide a heating command in response to the heating power value;
• and
• wherein the power converter is responsive to the heating command to heat the exhaust fluid of the prime mover.