Motor torque control method, apparatus, and computer readable medium for air blower

Abstract

A motor torque control method for an air blower may include: setting a phase current command value of a motor of the air blower based on a temperature of the motor, calculating a d-axis current command value other than zero in compliance with the set phase current command value, and outputting the calculated d-axis current command value.

What is claimed is: 
     
         1 . A motor torque control method for an air blower, comprising:
 setting, by a controller, a phase current command value of a motor of the air blower based on a temperature of the motor;   calculating, by the controller, a d-axis current command value other than zero in compliance with the set phase current command value; and   outputting, by the controller, the calculated d-axis current command value.   
     
     
         2 . The motor torque control method of  claim 1 , wherein the d-axis current command value is calculated using the set phase current command value and a q-axis current command value determined in compliance with an input speed command value. 
     
     
         3 . The motor torque control method of  claim 1 , wherein a value at which the phase current command value is set decreases as the temperature of the motor increases. 
     
     
         4 . The motor torque control method of  claim 1 , further comprising determining, by the controller, whether a present condition is a cold-start condition in which an external temperature of a fuel cell vehicle is less than or equal to a preset temperature, wherein
 the phase current command value of the motor is set based on the temperature of the motor only when it is determined that the present condition is a cold-start condition.   
     
     
         5 . A motor torque control apparatus for an air blower, comprising:
 a memory configured to store program instructions; and   a processor configured to execute the program instructions so as to perform a process including:
 setting a phase current command value of a motor of the air blower based on a temperature of the motor, 
 calculating a d-axis current command value other than zero in compliance with the set phase current command value, and 
 outputting the calculated d-axis current command value. 
   
     
     
         6 . A non-transitory computer readable medium containing program instructions for performing a motor torque control method for an air blower, executed by a processor or controller, the computer readable medium comprising:
 program instructions that set a phase current command value of a motor of the air blower based on a temperature of the motor;   program instructions that calculate a d-axis current command value other than zero in compliance with the set phase current command value; and   program instructions that output the calculated d-axis current command value.