Method for identifying stator resistance parameters
A technology of stator resistance and identification method, which is applied in the estimation/correction of motor parameters, electronic commutation motor control, electrical components, etc., can solve the problems of multiple storage space, reduced voltage drop, wrong results, etc., to improve adaptability , Eliminate the influence of the conduction voltage drop, the effect of strong adaptability
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[0039] Figure 4 It is a flowchart of the two-point method, which includes the following steps:
[0040] 1) Initialize the registers in the processor, and clear the identification flags.
[0041] 2) Set a current target value and tolerance range, for the DC voltage U on the bus DC Do chopping, inject stator resistance, set period T s1 , The motor adopts the star connection method, if it is a delta connection method, the same result can be obtained through the conversion between the delta and star.
[0042] 3) The processor performs 256-point sampling on the current of the stator resistance.
[0043] 4) Filter after sampling, and adjust pulse width t by proportional integral 1 , so that the current is within tolerance.
[0044] 5) Calculate the average current I 1 , due to the duty cycle Therefore, the average voltage U is calculatedav1 =U DC ×D 1 .
[0045] 6) Record the average current I 1 and the average voltage U av1 , add 1 to the identification flag bit, and ...
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