Motor mechanical properties characterization of motor shaft torque generated by the M and characteristics of the corresponding relationship between running speed п. In order to function п = f (M)Said. It is a significant characteristic of characterization motor work. n motor driving load is the purpose of the machinery to provide a certain amount of torque to the job, and make it can be run at a certain speed. Is the production of mechanical torque and rotational speed of motor is put forward two basic requirements for the motor mechanical properties to meet technological requirements of production machinery, fully use the power of the motor and reasonable design of the electric drive control and speed control system has important significance. Depending on the current system of different mechanical properties are divided into direct current motor and ac motor mechanical properties. 1 introduction
characterization of motor shaft torque generated by the M and characteristics of the corresponding relationship between running speed п. In order to function п = f (M)Said. It is a significant characteristic of characterization motor work. motor driving load is the purpose of the machinery to provide a certain amount of torque to the job, and make it can be run at a certain speed. Is the production of mechanical torque and rotational speed of motor is put forward two basic requirements for the motor mechanical properties to meet technological requirements of production machinery, fully use the power of the motor and reasonable design of the electric drive control and speed control system has important significance. Depending on the current system of different mechanical properties are divided into direct current motor and ac motor mechanical properties. 2 dc motor mechanical properties are separately excited, dc motor series and compound 3 kinds. п for motor speed in (Revolutions per minute); U for the motor armature voltage (V)； KE the electromotive force constant of the motor and its value depends on the motor structure; KM for the constant torque of the motor, its value depends on the motor structure; φFor the magnetic flux of the motor (Weber)； The resistance of the Rc for motor armature winding (O)； Rs for motor armature loop sino-foreign series resistance (O), M is the electromagnetic torque of the motor (Cattle meters), its value is proportional to the armature of the motor
artificial mechanical characteristics of ac asynchronous motor can be through the change of the stator voltage, magnetic pole logarithm, stator cascade circuit impedance, series resistance and the change of power frequency in the rotor circuit, etc
