Method of current reference generation for a motor

A motor control system for determining a reference d-axis current, comprising:na motor;a DC power source and DC input lines, the DC power source generating a bridge voltage across the DC input lines;a current command controller in communication with the motor and the DC input lines, the current command controller configured to:nmonitor the bridge voltage and a torque reference command;determine a peak current based on the torque reference command;determine a current angle based on the peak current; anddetermine the reference d-axis current based on the current angle.

A motor control system for determining a reference d-axis current, comprising:na motor;a DC power source and DC input lines, the DC power source generating a bridge voltage across the DC input lines; anda current command controller in communication with the motor and the DC input lines, the current command controller configured to:nmonitor the bridge voltage and a torque reference command;determine a peak current based on the torque reference command;determine a current angle based on the peak current; anddetermine the reference d-axis current based on the current angle,wherein a value for the current angle is found within a solution domain,wherein the solution domain is defined by a starting point and an ending point,wherein the starting point is defined as a local current angle multiplied by a constant and the ending point is the local current angle.

A motor control system for determining a reference d-axis current, comprising:na motor;a DC power source and DC input lines, the DC power source generating a bridge voltage across the DC input lines; anda current command controller in communication with the motor and the DC input lines, the current command controller configured to:nmonitor the bridge voltage and a torque reference command;determine a peak current based on the torque reference command;determine a current angle based on the peak current; anddetermine the reference d-axis current based on the current angle,wherein the current command controller determines a reference q-axis current based on the reference d-axis current and the torque reference command,wherein the reference q-axis command is determined by:nIq—REF=Te/(√{square root over (3)}/2*Ke+(3/2(P/2)(Lq−Ld)*Id—REF wherein Iq—REF is the reference q-axis command, Te is the torque reference command, Ke is a motor constant, P is a number of poles of the motor, Lq is a q-axis inductance, Ld is a d-axis inductance, and Id—REF is the reference d-axis current.

A motor control system for determining a reference d-axis current, comprising:na motor;a DC power source and DC input lines, the DC power source generating a bridge voltage across the DC input lines; anda current command controller in communication with the motor and the DC input lines, the current command controller configured to:nmonitor the bridge voltage and a torque reference command;determine a peak current based on the torque reference command;determine a current angle based on the peak current; anddetermine the reference d-axis current based on the current angle,wherein the current command controller determines a reference q-axis current based on the reference d-axis current and the torque reference command,wherein the current command controller determines a voltage command based on the reference d-axis current Id—REF and the reference q-axis current,wherein current command controller determines the reference d-axis current Id—REF and the reference q-axis current based on a first region of operation if the voltage command is less than the bridge voltage.

A motor control system for determining a reference d-axis current, comprising:na motor;a DC power source and DC input lines, the DC power source generating a bridge voltage across the DC input lines; anda current command controller in communication with the motor and the DC input lines, the current command controller configured to:nmonitor the bridge voltage and a torque reference command;determine a peak current based on the torque reference command;determine a current angle based on the peak current; anddetermine the reference d-axis current based on the current angle,wherein the current command controller determines a reference q-axis current based on the reference d-axis current and the torque reference command,wherein the current command controller determines a voltage command based on the reference d-axis current Id—REF and the reference q-axis current,wherein current command controller determines the reference d-axis current Id—REF and the reference q-axis current based on a second region of operation if the voltage command is greater than or equal to the bridge voltage.

A method of determining a reference d-axis current for a motor, comprising:nmonitoring a bridge voltage and a torque reference command by a current command controller, the bridge voltage generated by a DC source across DC input lines;determining a reference peak current based on the torque reference command and a motor constant;determining a current angle based on the reference peak current; anddetermining the reference d-axis current based on the current angle.

A method of determining a reference d-axis current for a motor, comprising:nmonitoring a bridge voltage and a torque reference command by a current command controller, the bridge voltage generated by a DC source across DC input lines;determining a peak current based on the torque reference command;determining a current angle based on the peak current, wherein a value for the current angle is found within a solution domain;determining the reference d-axis current based on the current angle;defining the solution domain by a starting point and an ending point; anddefining the starting point as a local current angle multiplied by a constant and the ending point is the local current angle.

A method of determining a reference d-axis current for a motor, comprising:nmonitoring a bridge voltage and a torque reference command by a current command controller the bridge voltage generated by a DC source across DC input lines;determining a peak current based on the torque reference command;determining a current angle based on the peak current, wherein a value for the current angle is found within a solution domain;determining the reference d-axis current based on the current angle; anddetermining a reference q-axis current based on the reference d-axis current and the torque reference command,wherein the reference q-axis command is determined by:nIq—REF=Te/(√{square root over (3)}/2*Ke+(3/2(P/2)(Lq−Ld)*Id—REF wherein Iq—REF is the reference q-axis command, Te is the torque reference command, Ke is a motor constant, P is a number of poles of the motor, Lq is a q-axis inductance, Ld is a d-axis inductance, and Id—REF is the reference d-axis current.