Open loop phase pre-charge

A method comprising:

• pre-charging a Switching Mode Power Supply (SMPS) to a regulation set point directly from at least one phase of an Alternating Current (AC) voltage;
• detecting the regulation set point and a specified phase angle with a charge generator comprising a gate driver that is powered by the pre-charged SMPS;
• in response to detecting the regulation set point, iteratively detecting the specified phase angle of the AC voltage;
• and
• in response to detecting the specified phase angle, iteratively generating a charging voltage during a positive voltage interval that charges a Direct Current (DC) bus capacitor to a target DC bus voltage within a charging time interval.

A system comprising:

• a motor;
• a motor inverter that drives the motor;
• a rectifier that supplies power to the motor inverter, the rectifier comprising:
• a Switching Mode Power Supply (SMPS) charging diode that pre-charges an SMPS to a regulation set point directly from at least one phase of an Alternating Current (AC) voltage;
• and
• a charge generator comprising a gate driver that is powered by the pre-charged SMPS to detect the regulation set point and a specified phase angle and in response to detecting the regulation set point iteratively detects the specified phase angle of the AC voltage and in response to the specified phase angle, the gate driver controls the charge generator to iteratively generates a charging voltage during a positive voltage interval that charges a Direct Current (DC) bus capacitor to a target DC bus voltage within a charging time interval;
• wherein at least a portion of the charge generator comprises one or more of hardware and executable code, the executable code stored on one or more non-transitory computer readable storage media.