초록 ▼

An apparatus and method are described for adjusting the modeled resistance used in the control of an electric motor drive to match the actual resistance of the motor. The system comprises sensors for measuring motor current and motor speed, which data is inputted into a processing unit. The processo

An apparatus and method are described for adjusting the modeled resistance used in the control of an electric motor drive to match the actual resistance of the motor. The system comprises sensors for measuring motor current and motor speed, which data is inputted into a processing unit. The processor uses the measured rotational speed to calculate what the proper current should be based upon the torque desired. If the calculated current is not equal to the measured current, then the modeled resistance of the motor is altered to correct the current. The invention is particularly useful for permanent magnet brushless motors operating in voltage mode.

대표청구항 ▼

1. An apparatus for adjusting the modeled resistance of an electric motor by motor current, comprising:a sensor for measuring motor current; device for measuring motor speed; a processing unit adapted to: receive said measured motor current, said measured motor speed and a command torque; calculate

1. An apparatus for adjusting the modeled resistance of an electric motor by motor current, comprising:a sensor for measuring motor current; device for measuring motor speed; a processing unit adapted to: receive said measured motor current, said measured motor speed and a command torque; calculate a command motor phase current based upon said command torque and measured motor speed; compare said calculated command phase current with said measured motor current to derive a current error; and adjust the modeled resistance from the said current error to adjust said measured motor current to equal said calculated command phase current.