Brushless motor controller of the back emf constant KE is to have cultured, because here include the counter electromotive force of the motor controller constant KE KE and generator controller of induction electromotive force constants, although they can be thought of as the same value, but the concept is not the same as the back emf constant KE with unit of motor controller speed counter electromotive force, the expression of KE = E/n = U/n '0 in the motor controller of the technical requirements, the rated voltage of the motor controller U, rated speed of the motor controller nN is must be some n is motor controller output shaft speed, can be measured, but E did not express on the shaft of the motor controller, also cannot express on the motor controller input power end, coil motor controller is a quantity of the internal potential. In the formula, the voltage U is the power input end of a clear input, but the ideal no-load rotation speed of motor controller n '0 in the motor controller can't express and measuring the shaft end, so use the formula & # 160; KE = U/n '0 to find the counter electromotive force of the motor controller constant KE is difficult. How from the technical conditions of the brushless motor controller or mechanical characteristic curve to determine and calculate the motor controller back emf constant KE, this design accord with KE parameter values of mechanical characteristic curve of the brushless motor controller is a need to study the topic if the KE, KE = N Φ / 60, motor controller effective conductor number N and magnetic flux controller work Φ product (Magnetic chain N Φ)KE to counter electromotive force of the motor controller constant value, the mechanical characteristics of motor controller is basically achieve the desired mechanical properties. Here are several kinds of calculating method of back emf constant KE, motor controller and the effective number of conductor N of motor controller, finally achieve the aim of brushless motor controller design.
