Method and device for detecting initial position of AC permanent magnet synchronous motor rotor
An initial position detection, permanent magnet synchronous motor technology, applied in the direction of controlling electromechanical transmission, controlling generator, motor generator control, etc., can solve the problem of heavy workload, prone to errors, affecting the accuracy and reliability of initial position detection operability and other issues, to achieve the effect of rapid determination, high accuracy and operability
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Embodiment 1
[0031] figure 2 It is an implementation flow chart of an initial position detection method for an AC permanent magnet synchronous motor rotor provided in Embodiment 1 of the present invention. This embodiment includes:
[0032]S101: Obtain the combination of states of the current pulse signals of each phase of the motor rotor detected by the position sensor.
[0033] Wherein, the position sensor can be an incremental photoelectric encoder. When the motor rotor is in motion, the position sensor can detect the pulse signals of each phase during the rotation of the motor rotor. The AC permanent magnet synchronous motor is a three-phase U, V, W-phase pulse signal, the phase difference of the three-phase U, V, and W-phase pulse signals is 120°, and the pulse signal is divided into a high-level area and a low-level area, in which the high-level area is represented by 1, and the low-level area is represented by 1 0 means. refer to image 3 A schematic diagram of the corresponding...
Embodiment 2
[0042] Figure 4 It is an implementation flow chart of an initial position detection method of an AC permanent magnet synchronous motor rotor provided in Embodiment 2 of the present invention. On the basis of the above embodiment, it also includes before step S101:
[0043] S201: Obtain the angle value and increment of the motor rotor generated by the angle generator.
[0044] Among them, the angle generator can generate an angle value θ during an electrical angle cycle 0 , the value range is 0~360°, and then generates an increment ±Δθ, +Δθ and -Δθ can indicate that the rotation direction of the motor rotor (forward or reverse) is different, and the unit of Δθ is ° / millisecond.
[0045] S202: Obtain the angle range of the motor rotor corresponding to the state combination of each group of pulse signals of each phase of the motor rotor during the process of the motor rotor rotating for one electrical angle cycle according to the angle value and increment of the motor rotor.
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Embodiment 3
[0075] Corresponding to the initial position detection method of the AC permanent magnet synchronous motor rotor described in the above embodiments, Figure 7 A structural block diagram of an initial position detection device for an AC permanent magnet synchronous motor rotor provided in Embodiment 3 of the present invention is shown. For convenience of description, only parts related to the embodiment of the present invention are shown.
[0076] refer to Figure 7 , the device includes: an acquisition module 301 , a data query module 302 , and a data processing module 303 .
[0077] Wherein, the acquiring module 301 is configured to acquire the combination of states of the current pulse signals of each phase of the motor rotor detected by the position sensor.
[0078] The data query module 302 is used to query the correspondence between the pre-saved state combination of the pulse signals of each phase of the motor rotor and the estimated value of the initial angle of the mo...
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