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

Inactive Publication Date: 2020-03-27
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long-term cables have distributed inductance and distributed capacitance, which will produce traveling wave reflection of high-frequency voltage, resulting in overvoltage of the motor, and long-term operation will reduce the service life of the permanent magnet synchronous motor

Method used

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  • Bilateral filtering permanent magnet synchronous motor driving device adopting SiC MOSFETs
  • Bilateral filtering permanent magnet synchronous motor driving device adopting SiC MOSFETs
  • Bilateral filtering permanent magnet synchronous motor driving device adopting SiC MOSFETs

Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a bilateral filtering permanent magnet synchronous motor driving device adopting SiC MOSFETs, and relates to the technical field of power electronics, and the technical schemeis that the bilateral filtering permanent magnet synchronous motor driving device comprises a three-phase power grid, an LCL filter, a rectifier, a DC bus, an inverter, an LC filter, a long-line cableand a permanent magnet synchronous motor which are connected in sequence; the rectifier and the inverter adopt SiC MOSFETs which are high in switching speed and low in loss as power switching devices. The beneficial effects of the invention are as follows: the SiC MOSFET which is high in switching speed, low in switching loss, small in conduction resistance and high in working temperature is usedas a power switching device. The switching frequency of the driving device can be increased to 50 kHz or above, so that the weight and size of the LCL and LC filters are reduced, the system control precision is improved, the efficiency of the driving device is improved, the working temperature of the driving device is increased, and the cooling link is simplified.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a bilateral filter permanent magnet synchronous motor drive device using SiC MOSFET Background technique [0002] The permanent magnet synchronous motor has no rotor loss during stable operation, and does not require a large excitation current component during operation, and its efficiency and power density are higher than those of the asynchronous motor with the same capacity. In recent years, with the development of electronic technology, motor control theory and permanent magnet materials, permanent magnet synchronous motors have been rapidly popularized and applied. [0003] However, the power semiconductor switching device used in the existing permanent magnet synchronous motor drive device is a silicon (Si) insulated gate bipolar transistor (IGBT), which has large switching and conduction losses, which limits the efficiency of the drive device. In ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/08H02P25/026H02P6/10H02M7/217H02M7/5395H02M1/12
CPCH02M1/126H02M7/2173H02M7/5395H02P6/10H02P25/026H02P27/085H02M1/0054Y02B70/10
Inventor 李炜齐光峰孙东范路周宏斌马坤肖志勇
Owner CHINA PETROLEUM & CHEM CORP
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