A Method of Online Identification of Permanent Magnet Synchronous Motor Parameters
A permanent magnet synchronous and electric motor technology, applied in the direction of motor generator control, electronic commutation motor control, control generator, etc., can solve the problems of motor operation efficiency reduction, vector control deviation, and affect the dynamic characteristics of the control system, etc., to achieve the algorithm Simple, low-cost effect
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[0081] Embodiment: the system constitution of embodiment and figure 1 Same, the system structure is as mentioned above, it adopts the variable frequency controller and eddy current brake load independently developed by the applicant. The tested motor is not an ideal hidden pole PMSM, and the specifications of the tested motor are shown in Table 1:
[0082] Table 1 Parameters of the tested motor
[0083]
[0084] Use the LCR bridge and offline parameter identification method (DC voltammetry to measure R s , DC decay method to measure L d and L q , measured by the idling terminal voltage method ) Detect the motor parameters and confirm their changing characteristics.
[0085] Figure 5 (a) is the measured temperature characteristics. As the motor temperature T increases, R s , L d and L q increase, while slightly reduced. When the temperature rises from 25°C to 100°C, R s , L d and L q increased by 7.5%, 7.5% and 15%, respectively, 8.1% reduction.
[0086]...
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