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Three-phase switch reluctance motor four-quadrant no-position-sensor control method

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

Active Publication Date: 2016-08-24
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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  • Three-phase switch reluctance motor four-quadrant no-position-sensor control method
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  • Three-phase switch reluctance motor four-quadrant no-position-sensor control method

Examples

Experimental program
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Embodiment 1

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

Embodiment 2

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

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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 sensorless control method for a three-phase switched reluctance motor, in particular to a four-quadrant sensorless control method for a three-phase switched reluctance motor with various structures. Background technique [0002] The switch reluctance motor drive system is a self-synchronous motor system and requires accurate rotor position information to achieve high-performance control. The installation of the position sensor increases the cost and complexity of the system, while also reducing 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. The electromagnetic characteristics include rotor position information. The quantities that can be directly measured in a switched reluctance motor system mainly include winding voltage, winding current, current slope, current inflection po...

Claims

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Application Information

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