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Angle position detector of switched reluctance motor and detection method

A technology of switched reluctance motor and angular position, which is applied in the direction of electronic commutator, transmission of sensing components by electric/magnetic devices, transmission of sensing components by optical devices, etc. Can not be used and other problems, to reduce vibration and noise, increase flexibility, improve the effect of current waveform

Inactive Publication Date: 2011-08-10
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing detection methods. It is difficult for the existing position detector to detect the best commutation moment of the winding, and the position signal cannot be used for the angle control of the switched reluctance motor. By changing the pole width of the inductor to obtain the opening angle required by the control strategy, a simple structure, convenient implementation, strong and reliable angular position detector is provided for the switched reluctance motor

Method used

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  • Angle position detector of switched reluctance motor and detection method
  • Angle position detector of switched reluctance motor and detection method
  • Angle position detector of switched reluctance motor and detection method

Examples

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Embodiment 1

[0028] Example 1: figure 1 , figure 2 Shown is a photoelectric angular position detector for a three-phase 12 / 8-pole switched reluctance motor. The sensor 5 is a claw-shaped masking disk with 8 teeth and 8 slots. The pole pitch angle τ of the sensor 5 is Keep the center of the inductor's teeth aligned with the center of the rotor pole. Present embodiment adopts three photoelectric sensors as first, second, third sensor S1, S2, S3; First, second, third sensor S1, S2, S3 are installed on the PCB board 6, and PCB board 6 and The insulating support 7 is fixed to the end cover 3 of the motor through the positioning screws 4 in turn. The mechanical angle α between the first, second and third sensors S1, S2 and S3 in space is: The centers of the first, second and third sensors S1, S2 and S3 are sequentially aligned with the center of one pole in the three phases of the motor. In this embodiment: θ F = 2.75°, induction

[0029] The polar arc angle β of the device is:

[00...

Embodiment 2

[0035] Embodiment 2, image 3 , Fig. 4 and Fig. 5 show a kind of magnetosensitive angle position detector of three-phase 12 / 8 pole switched reluctance motor, its inductor is made up of circular turntable 8 and permanent magnet magnetic pole 9, and the pole pitch of inductor The angle τ is: Keep the pole center of the inductor aligned with the rotor pole center. In this embodiment, three magnetic sensors are used as the first, second and third sensors S1, S2 and S3; the first, second and third sensors S1, S2 and S3 are directly installed on the end cover 3 of the motor. The mechanical angle α between the first, second and third sensors S1, S2 and S3 in space is: The centers of the first, second, and third sensors S1, S2, and S3 are sequentially aligned with the center of one pole in the three phases respectively.

[0036] In this embodiment: θ F =2.75°, the polar arc angle β of the magnetic pole of the sensor is:

[0037]

[0038] The natural opening angle is:

[0...

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Abstract

The invention discloses an angle position detector of a switched reluctance motor and detection method, which belongs to the field of switched reluctance motors in mechanical and electric industry, and relates to an angle control position detector of a switched reluctance motor and detection method in particular. The angle position detector is provided with N static sensors and a rotary inductor; photoelectric sensors or magnetic sensors are adopted as the sensors; when the photoelectric sensors are adopted, the structure of the inductor is of a claw structure, which means that the inductor is a claw blanking disc with unequal tooth and tooth slot width; and the pole arc angle Beta of the tooth thereof is determined according to an optimal opening angle required by a control strategy; when the magnetic sensors are adopted, the structure of the inductor is of a disc structure. The detection method relates to implement position detection through obtaining the opening angle required by the control strategy through changing the pole arc angle of the inductor. The invention provides an angle position detector with the advantages of simple structure, convenient realization, firmness and reliability, which can obviously improve the current waveform of the switched reluctance motor, improve the efficiency of the motor, and reduce vibrations and noises.

Description

technical field [0001] The invention belongs to the field of electromechanical switched reluctance motors, in particular to a position detector and a detection method for angle control of switched reluctance motors. Background technique [0002] The switched reluctance motor transmission system is a new type of electromechanical integrated AC speed control system, which is mainly composed of four parts: switched reluctance motor, power converter, controller and position detector. Among them, the purpose of position detection is to determine the relative position of the motor stator and rotor, as the basis for controlling the on-off of the main switching device of the power converter. At present, the switched reluctance motor transmission system generally uses a photosensitive position detector, which is composed of a photoelectric sensor fixed on the stator and an inductor (commonly known as a masking disc) that rotates coaxially with the rotor. The photoelectric sensor is ...

Claims

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Application Information

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IPC IPC(8): H02P6/16G01D5/26G01D5/12
Inventor 孙建忠白凤仙孙斐然
Owner DALIAN UNIV OF TECH