Bilateral filtering permanent magnet synchronous motor driving device adopting SiC MOSFETs
A permanent magnet synchronous and driving device technology, which is applied to AC motor control, output power conversion devices, electrical components, etc. Low loss, suppressing traveling wave reflection, slowing down insulation aging
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Embodiment 1
[0037] see figure 1 , the present invention provides a bilateral filter permanent magnet synchronous motor drive device using SiC MOSFET, including a three-phase power grid Grid, LCL filter, rectifier Rectifier, DC bus DC-link, inverter Inverter, LC filter, Long cable LW and permanent magnet synchronous motor PMSM.
Embodiment 2
[0039] see figure 1 , on the basis of Embodiment 1, the control loop of the driving device includes: an incremental photoelectric encoder EC coaxially connected with the permanent magnet synchronous motor PMSM, and the incremental photoelectric encoder EC simultaneously obtains the rotor of the permanent magnet synchronous motor Position electrical angle θ e and speed n, used for vector control of permanent magnet synchronous motor;
[0040] The output terminal of the inverter Inverter and the capacitor terminal of the LC filter circuit are respectively equipped with a current sampling module, the output terminal of the incremental photoelectric encoder EC is connected to the PI regulator-1, and the output terminal of the regulator-1 is connected to the current of the inverter Inverter The output terminal of the sampling module is connected to the input terminal of the PI regulator 2; the output terminal of the inverter current sampling module is also connected to the input t...
Embodiment 3
[0081] On the basis of embodiment 2, a kind of permanent magnet synchronous motor control method based on this device:
[0082] In the speed outer ring, the speed given value n ref Compared with the permanent magnet synchronous motor speed n obtained by the quantitative photoelectric encoder EC, the q-axis given reference current i is output through the PI regulator-1 q_ref ;
[0083] In the current inner loop, detect the three-phase current i output by the inverter in the abc coordinate system a i b i c , the output current i of the inverter in the αβ coordinate system is obtained by CLARK transformation α i β ;
[0084] Inverter output current i in αβ coordinate system α i β and the electrical angle θ of the rotor position of the permanent magnet synchronous motor e After PARK transformation, the inverter output current i of the dq coordinate system is obtained d i q ;
[0085] In the d-axis current regulation loop, the d-axis is given a reference current i d_re...
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