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Control method of double-salient-pole electric machine without position sensor

A double-salient motor and control method technology, applied in the direction of electronic commutator, etc., can solve the problems of no double-salient motor and no position sensor technology, etc., and achieve the effect of large practical value and simple volume

Inactive Publication Date: 2007-07-11
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no effective position sensorless technology for doubly salient motors at home and abroad

Method used

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  • Control method of double-salient-pole electric machine without position sensor
  • Control method of double-salient-pole electric machine without position sensor
  • Control method of double-salient-pole electric machine without position sensor

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Experimental program
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Effect test

Embodiment Construction

[0031] 1 Estimation of the actual inductance value

[0032] 1.1 Flux linkage estimation

[0033] Taking a 12 / 8-pole electromagnetic double salient motor as an example, this patented technology first uses the measured voltage and current when the motor is running to estimate the flux linkage value.

[0034] The one-phase voltage equation of a doubly salient motor is

[0035] u = ir + dψ dt - - - ( 1 )

[0036] Solve the expression of one-phase winding flux linkage by formula (1)

[0037] ψ = ∫ 0 t ( u - ir ) dt + ψ ( 0 ) - - - ( 2 ...

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Abstract

A method for controlling position -free transducer of double -salient - pole machine confirms electric machine rotator position indirectly by directly utilizing armature current and voltage data of electric machine for realizing reliable operation of position free transducer on electric machine. In the method, rotator position data can be derived out by 3D inductance curve inversion of electric machine and indirect position-detection can be realized by utilizing digital signal processor or monolithic computer chip.

Description

technical field [0001] The invention relates to a position sensorless control method for a double salient motor, belonging to a digital control method for a special motor. Background technique [0002] For doubly salient motor drive system (DSM), real-time and accurate rotor position information is a necessary prerequisite for its reliable operation. At present, in double salient motor systems, shaft position sensors (see Figure 1) or other types of detection position detectors are generally used to obtain position information (see Figure 2), which will not only increase the volume, but also increase the cost and complexity of the system , more importantly, it will reduce the firmness of the DSM system structure, and it will be difficult to maintain, affecting the reliable operation of the entire system, especially limiting its application in harsh environments. Therefore, how to remove the position detector and indirectly determine the rotor position by directly using the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P6/18
Inventor 张乐周波
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS