Multi-pair-pole reluctance type rotary transformer

Abstract

The utility model discloses a multi-pair-pole reluctance type rotary transformer which comprises a stator module and an inner rotor, the inner rotor is located in an outer stator module, a plurality of salient poles are designed on the outer side of the inner rotor, and a plurality of winding grooves are designed in the inner wall of the stator module; the stator module is composed of a stator, a first winding framework and a second winding framework, and the first winding framework and the second winding framework are arranged on the two sides of the stator in an embedded mode respectively. The magnetic resistance type rotary transformer has the technical effects and advantages that: 1, due to the multi-antipode design, product lines are richer, and the application range of the magnetic resistance type rotary transformer is effectively expanded; the application selection of motor and fan clients is facilitated, and the selection blank of users is made up to a limited extent. Installation and position adjustment design is provided, production debugging is facilitated, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary transformers, in particular to a multi-pole magnetic resistance rotary transformer. Background Art

[0002] The existing reluctance rotary transformer has some shortcomings in structural design. For example, there is no adjustable mounting hole design, which makes it inconvenient to adjust the position of the reluctance rotary transformer and the matching main body such as the motor when installing, which brings inconvenience to the mechanical zero point and electrical zero point of the reluctance rotary transformer. The existing reluctance rotary transformer output method is too cumbersome, inefficient, and not conducive to production. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a multi-pole reluctance rotary transformer.

[0004] The technical solution of this utility model is as follows:

[0005] A multi-pole reluctance rotary transformer comprises a stator module and an inner rotor, wherein the inner rotor is located inside the outer stator module, the outer side of the inner rotor is designed with a plurality of salient poles, and the inner wall of the stator module is designed with a plurality of winding grooves; the stator module is composed of a stator, a first winding frame, and a second winding frame, and the first winding frame and the second winding frame are respectively embedded and arranged on both sides of the stator; an excitation winding, a sine output winding, and a cosine output winding are wound in corresponding winding grooves of the stator module to form a stator winding module; the signal transfer PCB is electrically connected to input and output signal lines, the excitation winding, the sine winding, and the cosine winding; the stator is designed with a plurality of waist-shaped mounting holes to facilitate the debugging of the reluctance rotary transformer with a motor and a fan.

[0006] A BMC shell is also provided, and the BMC shell encapsulates the winding module.

[0007] The corresponding relationship between the number of convex stages and the number of winding slots of the inner rotor is as follows:

[0008] The number of convex stages is 3, which corresponds to the number of winding slots being 16.

[0009] The number of convex stages is 4, which corresponds to the number of winding slots being 14.

[0010] The number of convex stages is 5, which corresponds to the number of winding slots being 14.

[0011] The number of convex stages is 6, which corresponds to the number of winding slots being 16.

[0012] The number of convex stages is 7, which corresponds to the number of winding slots being 18.

[0013] The number of convex stages is 8, which corresponds to the number of winding slots being 20.

[0014] The inner rotor and the stator are formed by laminating and buckling high magnetic induction non-oriented silicon steel sheets, and the thickness of the high magnetic induction non-oriented silicon steel sheets is 0.2-0.5 mm.

[0015] Technical effects and advantages of the utility model:

[0016] 1: The multi-pole design enriches the product line and effectively expands the application scope of reluctance resolver; it facilitates the application selection of motors and fans by customers and fills the gap in user selection.

[0017] 2: The self-installation and position adjustment design facilitates production debugging and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an exploded view of the utility model;

[0019] Figure 2 It is the assembly drawing;

[0020] Figure 3 is a cross-sectional view;

[0021] Figure 4 is the rotor diagram;

[0022] Figure 5 is the stator diagram;

[0023] Figure 6 It is the winding skeleton diagram;

[0024] Figure 7 This is the stator module diagram;

[0025] Figure 8 This is a schematic diagram of the signal transfer PCB;

[0026] Fig. 9 This is a schematic diagram of the wiring PCB;

[0027] Fig.10 This is a schematic diagram of a signal transfer module;

[0028] Fig.11 This is the winding module diagram;

[0029] Fig.12 is a schematic diagram of a stator module S;

[0030] Fig.13 This is the waveform diagram of the rotor forward rotation output;

[0031] Fig.14 This is the rotor reverse output waveform;

[0032] Fig.15 The explosion diagram for level 5;

[0033] Fig.16The explosion diagram for 6 pairs of levels;

[0034] Fig.17 When there are 6 pairs of stages, the stator module is covered with BMC rubber. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0036] like Figure 1-Figure 14 As shown, the inner rotor is designed with 3 pairs of poles.

[0037] This embodiment uses the salient pole effect of the magnetic field, uses winding on the stator to generate an alternating excitation magnetic field (the excitation power supply usually uses 10K H 7V), and winds the corresponding sine and cosine windings on the corresponding axial stator. When the rotor rotates, the corresponding sine windings and cosine windings will induce voltage signals at corresponding positions (depending on the designed transformer ratio, the output voltage value is different accordingly). In this patent, two PCBs, signal transfer PCB 3 and wiring PCB 8, are used for the input and output signal transfer of the excitation winding, sine winding, and cosine winding. In this embodiment, the inner rotor 1 is 3 salient poles (3 pairs of poles), the stator in this embodiment is designed with 16 slots, and the rotor 1 and stator 6 are high magnetic induction non-oriented silicon steel sheets (0.2~0.5mm thickness). In this embodiment, the stator 6 is designed with multiple waist-shaped mounting holes A to facilitate the commissioning of the reluctance rotary transformer, motor, and fan.

[0038] As attached Figure 1 As shown in the figure: 1: 3-pole rotor; 2: BMC housing; 3: signal transfer PCB; 4: input and output wires; 5: first winding frame; 6: stator; 7: second winding frame; 8: wire management PCB; thermosetting plastic (BMC).

[0039] The 3-pole rotor 1 is designed to have a sine ratio of 1.2 to 1.6 with the stator. It is made of high magnetic induction silicon steel sheets that are stamped and then laminated and buckled. Figure 3 .

[0040] The stator 6 is designed with 5 evenly distributed installation adjustment slots. Figure 5 As shown in A, it is convenient for installation and debugging with motors and fans. The outer diameter is designed to be ∅74mm and the thickness is designed to be 8mm (there will be a certain tolerance range due to processing errors). The stator is made of high magnetic induction silicon steel sheets that are stamped and then stacked and buckled.

[0041] The first winding skeleton 5 and the second winding skeleton 7 are made of engineering plastic (PBT PA6 PA66+30 PA66+GF40PA) through mold injection.

[0042] The signal transfer PCB3 is designed to be attached Figure 8 The input and output signal lines 4 and the signal transfer PCB 3 are assembled and welded to form a structure as shown in the attached figure. Fig.10 Signal transfer PCB module.

[0043] The first winding frame 5 and the second winding frame 7 are made of engineering plastics through mold injection, and together with the stator 6 form a winding frame as shown in the attached figure. Figure 7 The stator module is shown in the figure. The excitation winding, sine winding, and cosine winding with a characteristic transformation ratio (the transformation ratio is generally 0.286 and there will be a corresponding ratio tolerance range) are wound onto the stator module to form the following Fig.11 Winding module. The signal transfer PCB module and the winding module are assembled, and after hot pressing and fixing (or ultrasonic welding), a stator module S as shown in FIG12 is formed. The stator module S is placed in a BMC thermosetting plastic mold for processing to form a stator module as shown in FIG12. Figure 2 Medium product.

[0044] When the rotor 1 rotates forward, every 360°, the sine winding and cosine winding output a complete sine envelope and a complete cosine envelope. The current angle and angular velocity of the shaft can be calculated through the decoding chip and algorithm. Fig.13 .

[0045] When the rotor 1 reverses, every 360°, the sine winding and cosine winding output a complete sine envelope and a complete cosine envelope. The current angle and angular velocity of the shaft can be calculated through the decoding chip and algorithm. Fig.14 .

[0046] Application Scenarios

[0047] 1: This patent is used to measure the angle and speed of rotating shafts in products such as motors, pumps, machine tool spindles, gearboxes, automation, and shipbuilding industries.

[0048] 2: This patent is applied to displacement measurement in transmission systems. Embodiment 2

[0049] like Fig.15 As shown, the inner rotor is designed with 5 pairs of poles.

[0050] The rotor is a high magnetic induction silicon steel sheet (such as B20AHZ1200) formed by stamping and lamination, with a total of 5 salient poles. In this embodiment, the stator is designed with 14 slots. For each forward rotation of the rotor, the reluctance resolver outputs a complete sine envelope, and the two envelope signals of the cosine envelope signal have a phase difference of +90°. The user demodulates the sine envelope and cosine envelope through the controller to obtain the relative position and speed of the rotor relative to the measured object; when the rotor reverses, the phase difference between the sine envelope and the cosine envelope is -90°. Since the phase difference between the sine envelope and the cosine envelope is different for forward and reverse rotation, the forward and reverse rotation of the measured object can be judged. Embodiment 3

[0051] like Fig.16 and 17 As shown, the inner rotor is designed with 6 pairs of poles.

[0052] The stator is designed with 16 slots (corresponding to 6 pairs of poles) evenly distributed in proportion to the number of rotor poles, and the outer diameter is 76mm.

[0053] The rotor is designed with 6 pairs of poles (6 salient poles) and the inner diameter of the rotor is 20mm.

[0054] The stator module S is placed in a BMC thermosetting plastic mold and processed to form the following Fig.17 Medium product.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-pole reluctance rotary transformer, characterized in that: The invention comprises a stator module, an inner rotor, a signal transfer PCB, and input and output signal lines. The inner rotor is located inside the outer stator module. The outer side of the inner rotor is designed with a plurality of salient poles. The inner wall of the stator module is designed with a plurality of winding grooves. The stator module is composed of a stator, a first winding skeleton, and a second winding skeleton. The first winding skeleton and the second winding skeleton are respectively embedded on both sides of the stator. The corresponding winding grooves of the stator module are wound with an excitation winding, a sine output winding, and a cosine output winding to form a stator winding module. The signal transfer PCB is electrically connected to the input and output signal lines, the excitation winding, the sine winding, and the cosine winding; the stator is designed with a plurality of waist-shaped mounting holes to facilitate the debugging of the reluctance rotary transformer, the motor, and the fan.

2. The multi-pole reluctance rotary transformer according to claim 1, characterized in that: A BMC shell is also provided, and the BMC shell encapsulates the winding module.

3. The multi-pole reluctance rotary transformer according to claim 1, characterized in that: The corresponding relationship between the number of convex stages and the number of winding slots of the inner rotor is as follows: The number of convex stages is 3, which corresponds to the number of winding slots being 16. The number of convex stages is 4, which corresponds to the number of winding slots being 14. The number of convex stages is 5, which corresponds to the number of winding slots being 14. The number of convex stages is 6, which corresponds to the number of winding slots being 16. The number of convex stages is 7, which corresponds to the number of winding slots being 18. The number of convex stages is 8, which corresponds to the number of winding slots being 20.

4. The multi-pole reluctance rotary transformer according to claim 1, characterized in that: The inner rotor and the stator are formed by laminating and buckling high magnetic induction non-oriented silicon steel sheets, and the thickness of the high magnetic induction non-oriented silicon steel sheets is 0.2-0.5 mm.

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