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A four-quadrant position sensorless control method for a three-phase switched reluctance motor

A reluctance motor, three-phase switch technology, applied in motor generator control, AC motor control, electronic commutation motor control and other directions, can solve problems such as real-time calculation of complex mathematical models

Active Publication Date: 2018-05-29
陈昊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high-frequency pulse injection method and modulation method are only suitable for low-speed sections, and the current gradient method is only suitable for high-speed sections. The inductance model method, observer method and intelligent control algorithm have a wide range of speed regulation, but require complex mathematical models and massive real-time computing

Method used

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  • A four-quadrant position sensorless control method for a three-phase switched reluctance motor
  • A four-quadrant position sensorless control method for a three-phase switched reluctance motor
  • A four-quadrant position sensorless control method for a three-phase switched reluctance motor

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment one, as figure 1 Take the three-phase 12 / 8 structure switched reluctance motor system shown as an example, the position where the center line of the stator pole of the B phase coincides with the center line of the slot of the rotor is the position of the B phase θ=0°, θ r =45 0 is a rotor cycle, there are four flux linkage-current characteristic curves of special rotor positions, that is, θ r / 6=7.5 0 Flux linkage-current characteristic curve ψ of rotor position θr / 6 , θ r / 3=15 0 Flux linkage-current characteristic curve ψ of rotor position θr / 3 , 2θ r / 3=30 0 Flux linkage-current characteristic curve ψ of rotor position 2θr / 3 , 5θ r / 6=37.5 0 Flux linkage-current characteristic curve ψ of rotor position 5θr / 6 , 7.5 0 Flux linkage-current characteristic curve ψ of rotor position θr / 6 and 37.5 0 Flux linkage-current characteristic curve ψ of rotor position 5θr / 6 Consistent, marked as ψ L = ψ θr / 6 = ψ 5θr / 6 , 15 0 Flux linkage-current charac...

Embodiment 2

[0057] Embodiment two, as Figure 4 Take the three-phase 6 / 4 structure switched reluctance motor system shown as an example, the position where the stator pole centerline of B-phase coincides with the slot centerline of the rotor is B-phase θ=0° position, θ r =90 0 is a rotor cycle, there are four flux linkage-current characteristic curves of special rotor positions, that is, θ r / 6=15 0 Flux linkage-current characteristic curve ψ of rotor position θr / 6 , θ r / 3=30 0 Flux linkage-current characteristic curve ψ of rotor position θr / 3 , 2θ r / 3=60 0 Flux linkage-current characteristic curve ψ of rotor position 2θr / 3 , 5θ r / 6=75 0 Flux linkage-current characteristic curve ψ of rotor position 5θr / 6 , 15 0 Flux linkage-current characteristic curve ψ of rotor position θr / 6 and 75 0 Flux linkage-current characteristic curve ψ of rotor position 5θr / 6 Consistent, marked as ψ L = ψ θr / 6 = ψ 5θr / 6 , 30 0 Flux linkage-current characteristic curve ψ of rotor position θ...

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Abstract

The invention discloses a three-phase switch reluctance motor four-quadrant no-position-sensor control method, and belongs to the technical field of motor driving. The method is characterized in by comprising the steps: actually measuring each phase magnetic flux linkage of a switch reluctance motor by using a testing circuit; according to four magnetic flux linkage-current characteristic curves of a special rotor position, namely a magnetic flux linkage-current characteristic curve phi (theta <r> / 6) of a theta <r> / 6 rotor position, a magnetic flux linkage-current characteristic curve phi (theta <r> / 3) of a theta <r> / 3 rotor position, a magnetic flux linkage-current characteristic curve phi (2theta <r> / 3) of a 2theta <r> / 3 rotor position, a magnetic flux linkage-current characteristic curve phi (5theta <r> / 6) of a 5theta <r> / 6 rotor position, determining the rotor position; sequentially switching on and switching off each phase; and implementing forward and backward start-up, low-speed forward power-on and braking operation, low-speed backward power-on and braking operation, middle / high-speed forward power-in and braking operation, middle / high-speed backward power-on and braking operation. According to the three-phase switch reluctance motor four-quadrant no-position-sensor control method, no rotor position sensor is provided, three-phase switch reluctance motor four-quadrant control is achieved, and engineering application value is excellent.

Description

technical field [0001] The invention relates to a four-quadrant position sensorless control method for a three-phase switched reluctance motor, in particular to a four-quadrant position sensorless control method for a three-phase switched reluctance motor suitable for various structures. Background technique [0002] The switched reluctance motor drive system is a self-synchronous motor system that requires accurate rotor position information to achieve high-performance control. The installation of position sensors increases the cost and complexity of the system, and also reduces the reliability of the drive system. The double salient pole structure and concentrated winding make the switched reluctance motor have special inductance and flux linkage characteristics, and the electromagnetic characteristics contain the rotor position information. The quantities that can be directly measured in the switched reluctance motor system mainly include winding voltage, winding current...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P25/089H02P21/36H02P25/028
CPCH02P25/08
Inventor 陈昊
Owner 陈昊
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