Novel reluctance type brushless angle signal motor

Abstract

A novel reluctance type brushless angle signal motor comprises an annular stator and an annular rotor, the annular stator is concentrically arranged on the periphery of the annular rotor in a sleeving mode, and an air gap is formed between the annular stator and the annular rotor; the annular stator comprises an annular iron core, tooth grooves are evenly distributed in the inner circle of the annular iron core in the circumferential direction, a tooth pole is formed between every two adjacent tooth grooves, and harmonic wave removing grooves are evenly distributed in the inner surface of each tooth pole in the circumferential direction. Annular insulating sleeves are arranged at the two ends of the annular iron core and wrap the tooth grooves in an insulating manner; an excitation winding and a signal winding are wound on the annular insulating sleeve, and the excitation winding and the signal winding are covered by a protective cover; epoxy resin is filled between the protective covers to encapsulate the excitation winding and the signal winding. According to the utility model, the anti-harsh environment capability of the product can be effectively enhanced, the military harsh environment can be adapted, and the influence of the motor tooth harmonic wave on the signal transmission precision can be greatly reduced through the arrangement of the harmonic wave removing groove.

Description

Technical Field

[0001] The utility model belongs to the technical field of angle signal detection, and in particular relates to a novel reluctance type brushless angle signal motor. Background Art

[0002] In the control systems of military equipment such as aviation, UAVs, and radars, it is necessary to continuously measure the shaft angle and angular velocity of aviation control motors, UAVs, radars, and other equipment through angle signal motors, and transmit the measurement signal to the detection circuit and DSP decoding system to obtain the operating posture and instantaneous state of the control motor and shaft, thereby providing a basis for control.

[0003] As new military equipment places increasing demands on sensor reliability and resistance to harsh environments, the brushed signal motors previously used in angle measurement and control systems have been phased out. Coupled brushless signal motors, due to their rotor wiring, have poor resistance to harsh environments and are gradually failing to meet the design requirements of new military aircraft and weaponry. With the advancement of DSP decoding technology, the superior performance of reluctance brushless angle signal motors has been fully demonstrated, fully meeting the development needs of new military aircraft, drones, tanks, and other weaponry. However, existing domestically produced reluctance brushless signal motors are primarily used in civilian applications. They suffer from low electrical precision, poor resistance to harsh environments, low temperature ratings, and poor reliability, making them difficult to meet the requirements of new military equipment. Summary of the Invention

[0004] The utility model provides a novel reluctance type brushless angle signal motor to overcome the deficiencies of the prior art and meet the use requirements of new military equipment.

[0005] The technical solution adopted by the present invention is: a new type of reluctance brushless angle signal motor, including an annular stator and an annular rotor, the annular stator is concentrically sleeved on the periphery of the annular rotor, and an air gap is set between the annular stator and the annular rotor; the annular stator includes an annular iron core, a plurality of tooth slots are uniformly distributed on the inner circumference of the annular iron core, and tooth poles are formed between two adjacent tooth slots, and a plurality of de-harmonic grooves are uniformly distributed on the inner surface of the tooth poles; annular insulating sleeves are symmetrically provided at both ends of the annular iron core, and a plurality of bosses adapted to the tooth slots are protruded from the inner end of the annular insulating sleeve, and a winding hole is provided on each boss; the screw thread is inserted through the bosses. The tooth slot and the tooth pole are inserted between two adjacent bosses, and the annular insulating sleeve is fixed to the two ends of the annular iron core, and the inner surface and end surface of the tooth slot are completely insulated and covered by the annular insulating sleeve; the excitation winding and the signal winding are wound on the annular insulating sleeve through the winding hole, the excitation winding is wound on the inner layer, and the signal winding is wound on the outer layer, and the outer ends of the annular insulating sleeve are fixed with protective covers to cover the excitation winding and the signal winding, and the starting and ending ends of the excitation winding and the signal winding are led out from the lead holes on the protective cover; the signal winding includes a sine signal output winding and a cosine signal output winding, and a number of salient poles are evenly distributed on the outer circumference of the annular rotor.

[0006] Epoxy resin is filled between the protective covers to encapsulate the excitation winding and the signal winding.

[0007] The annular core is formed by stacking silicon steel sheets, and the annular rotor is formed by epoxy bonding the silicon steel sheets layer by layer and then mechanically riveting them in the axial direction.

[0008] Twenty tooth slots are evenly distributed circumferentially on the inner circumference of the annular core, two deharmonic wave grooves are evenly distributed circumferentially on the inner surface of the tooth pole; and four salient poles are evenly distributed on the outer circumference of the annular rotor.

[0009] The minimum air gap between the annular stator and the annular rotor is 0.62 mm.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. The inner surface of the stator core tooth pole of the utility model is provided with a de-harmonic groove to remove the tooth harmonic content as much as possible, minimize the harmonic distortion rate of the magnetic flux density, improve the electrical accuracy of the product, and thus significantly reduce the impact of the motor tooth harmonics on the signal transmission accuracy.

[0012] 2. The winding of this utility model adopts epoxy potting, which effectively enhances the product's ability to resist harsh environments and adapt to the harsh military environment. The winding is covered and protected by an aluminum protective cover, which can shield the interference of external electric fields on the winding and improve product detection accuracy.

[0013] 3. The rotor of this utility model adopts epoxy bonding and mechanical riveting structure to enhance the strength at high speed, prevent the silicon steel sheets from loosening and scattering and generating noise at high speed, and the maximum operating speed reaches 25000r / min, which is much higher than the maximum operating speed of 4000r / min of similar domestic signal motor rotors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the annular stator structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the annular iron core of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the annular insulating sleeve of the utility model;

[0018] Figure 5 This is a schematic diagram of the annular rotor structure of the utility model. DETAILED DESCRIPTION

[0019] The following is combined with Figure 1-5 The present invention is described in detail with specific implementation methods.

[0020] A novel reluctance brushless angle signal motor comprises an annular stator 1 and an annular rotor 2. The annular stator 1 is concentrically sleeved on the periphery of the annular rotor 2, and an air gap is provided between the annular stator 1 and the annular rotor 2.

[0021] The annular stator 1 includes an annular core 3, a plurality of tooth slots 4 are uniformly distributed circumferentially on the inner circumference of the annular core 3, and tooth poles 5 are formed between two adjacent tooth slots, and a plurality of de-harmonic grooves 6 are uniformly distributed circumferentially on the inner surface of the tooth poles 5; annular insulating sleeves 7 are symmetrically provided at both ends of the annular core 3, and a plurality of bosses 8 are protruded from the inner end of the annular insulating sleeve 7 to match the tooth slots 4, and a winding hole 9 is provided on each of the bosses 8; the bosses 8 are inserted into the tooth slots 4, and the tooth poles 5 are clamped between two adjacent bosses 8, so that the annular insulating sleeves 7 are fixed to the two ends of the annular core 3, and the annular insulating sleeves 7 are fixed to the two ends of the annular core 3. The insulating sleeve 7 completely insulates the inner surface and end surface of the tooth slot 4; the excitation winding 10 and the signal winding 11 are wound on the annular insulating sleeve 7 through the winding hole 9, the excitation winding is wound on the inner layer, and the signal winding is wound on the outer layer. The outer ends of the annular insulating sleeve 7 are fixed with protective covers 12 to cover the excitation winding and the signal winding, and the starting and ending lead wires of the excitation winding and the signal winding are led out from the lead holes on the protective cover 12; the signal winding 11 includes a sine signal output winding and a cosine signal output winding, and a number of salient poles 13 are evenly distributed on the outer periphery of the annular rotor 2.

[0022] In order to effectively enhance the product's ability to withstand harsh environments and adapt to the harsh military environment, epoxy resin is filled between the protective covers 12 to encapsulate the excitation winding 10 and the signal winding 11. The protective cover 12 is preferably made of aluminum to shield the windings from interference from external electric fields.

[0023] In a specific embodiment, the annular core 3 is formed by stacking silicon steel sheets, and the annular rotor 2 is formed by epoxy bonding the silicon steel sheets layer by layer and then mechanically riveting them 14 in the axial direction; 20 tooth slots are evenly distributed circumferentially on the inner circumference of the annular core 3, two deharmonic wave grooves 6 are evenly distributed circumferentially on the inner surface of the tooth pole 5, and the annular insulating sleeve 7 is made of polytetrafluoroethylene with a temperature resistance of more than 250°C; four salient poles are evenly distributed on the outer circumference of the annular rotor 2; the minimum air gap between the annular stator 1 and the annular rotor 2 is 0.62mm; the operating frequency is 10K, the output signal is 3.5V, the electrical accuracy is not greater than 30', the operating temperature range is -55°C to 200°C, and the rotation speed is 0 to 25,000 r / min.

[0024] The present utility model is mainly used in the fields of aviation, unmanned aerial vehicles, radar and other military equipment, and can also be used in industries and industrial fields such as automobiles, robots, metallurgical machinery, textile machinery, wind power, engineering machinery, medical treatment, metallurgy, oil and gas, papermaking, vector motors, new energy vehicles, etc. In specific applications, the annular stator 1 is installed in the front support of the motor or rotating shaft under test, and the annular rotor 2 is installed on the main shaft or rotating shaft of the motor under test. During operation, an excitation voltage is applied to the excitation winding 10, and the annular rotor 2 rotates with the main shaft or rotating shaft of the motor under test. The signal winding 11 outputs a sine-cosine two-phase modulated signal containing angle information, continuously measures the angle and angular velocity of the motor or rotating shaft under test, and transmits the measurement signal to the detection circuit and DSP decoding system to obtain the operating posture and instantaneous state of the motor or rotating shaft under test, thereby providing a basis for control.

[0025] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A novel reluctance brushless angle signal motor comprising an annular stator and an annular rotor, wherein the annular stator is concentrically sleeved around the annular rotor, with an air gap provided between the annular stator and the annular rotor; characterized in that: The annular stator comprises an annular core, a plurality of tooth slots are uniformly distributed on the inner circumference of the annular core, and tooth poles are formed between two adjacent tooth slots, and a plurality of de-harmonic grooves are uniformly distributed on the inner surface of the tooth poles; annular insulating sleeves are symmetrically provided at both ends of the annular core, and a plurality of bosses are protruded from the inner end of the annular insulating sleeve to match the tooth slots, and each boss is provided with a winding hole; the bosses are inserted into the tooth slots, and the tooth poles are clamped between two adjacent bosses to fix the annular insulating sleeves to the two ends of the annular core, and the annular insulating sleeves are fixed to the two ends of the annular core by the annular The insulating sleeve completely insulates and covers the inner surface and end surface of the tooth slot; the excitation winding and the signal winding are wound on the annular insulating sleeve through the winding hole, the excitation winding is wound on the inner layer, and the signal winding is wound on the outer layer. The outer ends of the annular insulating sleeve are fixed with protective covers to cover the excitation winding and the signal winding, and the starting and ending ends of the excitation winding and the signal winding are led out from the lead holes on the protective cover; the signal winding includes a sine signal output winding and a cosine signal output winding, and a number of salient poles are evenly distributed on the outer circumference of the annular rotor.

2. The reluctance brushless angle signal motor according to claim 1, characterized in that: Epoxy resin is filled between the protective covers to encapsulate the excitation winding and the signal winding.

3. The reluctance brushless angle signal motor according to claim 1 or 2, characterized in that: The annular core is formed by stacking silicon steel sheets, and the annular rotor is formed by epoxy bonding the silicon steel sheets layer by layer and then mechanically riveting them in the axial direction.

4. The reluctance brushless angle signal motor according to claim 3, characterized in that: Twenty tooth slots are evenly distributed circumferentially on the inner circumference of the annular core, two deharmonic wave grooves are evenly distributed circumferentially on the inner surface of the tooth pole; and four salient poles are evenly distributed on the outer circumference of the annular rotor.

5. The reluctance brushless angle signal motor according to claim 4, characterized in that: The minimum air gap between the annular stator and the annular rotor is 0.62 mm.

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