CN112688444B - Single-phase reluctance motor with self-starting capability - Google Patents
Single-phase reluctance motor with self-starting capability Download PDFInfo
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- CN112688444B CN112688444B CN202011459898.0A CN202011459898A CN112688444B CN 112688444 B CN112688444 B CN 112688444B CN 202011459898 A CN202011459898 A CN 202011459898A CN 112688444 B CN112688444 B CN 112688444B
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Abstract
The invention discloses a single-phase reluctance motor with self-starting capability, which comprises a rotor core, a stator core, a magnetic ring, a rotor position detection circuit and a control circuit, wherein the stator core is provided with a plurality of stator teeth, the rotor core is nested in the stator core, the rotor core is provided with a plurality of rotor teeth matched with the stator core, the rotor teeth are matched with the stator teeth, the magnetic ring is arranged in the rotor core, the rotor position detection circuit is arranged on the rotor core and used for detecting the position of the rotor teeth, the rotor position detection circuit is connected with the control circuit, a first self-starting mechanism is arranged on the rotor teeth, and a second self-starting mechanism is arranged on the stator teeth; according to the invention, the first self-starting mechanism and the second self-starting mechanism are arranged, and the rotor teeth are driven to rotate after the magnetic field saturation is generated by utilizing the transversely protruding thin teeth, so that the problem of a starting dead zone is solved, the production cost of the reluctance motor is reduced, and the service life of the motor is prolonged.
Description
Technical Field
The invention relates to the technical field of switched reluctance motors, in particular to a single-phase reluctance motor with self-starting capability.
Background
When the single-phase reluctance motor is started, the rotor can not be started to rotate when the rotor and the stator of the motor are positioned at a certain specific position; this particular position at start-up is called the dead band, which is the reason why the rotor of the motor cannot start up because an initial force is required when the reluctance motor starts to start rotating. When the rotor and the stator of the motor are in a certain position, the initial forces just cancel each other out to zero.
The permanent magnet of a fixed position is installed for stator or shell through at the motor to prior art, and the position of this permanent magnet is located outside the dead zone, and when the motor outage was not used like this, the permanent magnet can attract the rotor to the position outside the dead zone, just can guarantee during the start-up like this that the rotor is not in the dead zone position, and its shortcoming is: rare earth is needed in the stacked permanent magnets, and rare earth materials are expensive; there will be a lot of iron fillings in the environment of motor work, and the permanent magnet can constantly adsorb these iron fillings, and after the longer more iron fillings of accumulation of time, can hinder the normal work of motor.
For example, chinese patent application No. CN201720490609.0, filed 2017, 05 and 02 discloses a switched reluctance motor and a device using the same, including a stator and a rotor, where the stator includes a plurality of pairs of stator teeth and windings wound on the stator teeth, the rotor includes at least one pair of rotor teeth, the pole arc of the rotor teeth is greater than that of the stator teeth, and the windings on at least two pairs of the adjacent stator teeth can be connected in series. The switched reluctance motor of this application establishes ties the winding of stator tooth, has guaranteed the continuity of winding current, reduces switched reluctance motor's vibration and noise, but still uses the permanent magnet to solve the problem of starting the dead zone.
Disclosure of Invention
The invention mainly solves the problem that the reluctance motor in the prior art has a starting dead zone; the single-phase reluctance motor with the self-starting capability is provided, initial torque is provided, the problem of starting dead zones is solved, a permanent magnet is replaced by the self-starting mechanism, the cost is low, and the efficiency is high.
The technical problem of the invention is mainly solved by the following technical scheme: a single-phase reluctance motor with self-starting capability comprises a rotor core, a stator core, a magnetic ring, a rotor position detection circuit and a control circuit, wherein the stator core is provided with a plurality of stator teeth, stator tooth grooves are formed among the stator teeth, the rotor core is nested in the stator core, an air gap exists between the rotor core and the stator core, the rotor core is provided with a plurality of rotor teeth matched with the stator core, the rotor teeth are matched with the stator teeth, the magnetic ring is arranged in the rotor core, coils are arranged on the stator teeth and connected with the control circuit, the rotor position detection circuit is arranged on the rotor core and used for detecting the positions of the rotor teeth, the rotor position detection circuit is connected with the control circuit, and a first self-starting mechanism is arranged on the rotor teeth, and a second self-starting mechanism is arranged on the stator gear pole. The reason why the motor rotor cannot be started in the dead zone is that an initial force is required when the reluctance motor starts to start rotating. When the rotor and the stator of the motor are in a specific position, the initial force is just counteracted to zero, in the prior art, a permanent magnet with a fixed position is arranged on the stator or the shell of the motor, and the position of the permanent magnet is positioned outside a dead zone, so that when the motor is not used in a power-off state, the permanent magnet can attract the rotor to a position outside the dead zone, and the rotor can be ensured not to be in the dead zone position during starting; the permanent magnet is replaced by the first self-starting mechanism and the second self-starting mechanism, different currents are supplied to the first self-starting mechanism and the second self-starting mechanism, the rotor teeth are located at different positions, an initial torque is supplied to the rotor iron core, the rotor rotates, the cost of the motor is reduced, hidden dangers are reduced, and the service life of the motor is prolonged.
Preferably, the first self-actuating mechanism and the second self-actuating mechanism are both thin teeth protruding transversely. And thin teeth are adopted, so that the starting mechanism can reach magnetic field saturation more quickly, and the rotor rotates more quickly.
Preferably, the first self-starting mechanism is arranged on the left side of the tail end of the rotor tooth pole, and the second self-starting mechanism is arranged on the right side of the tail end of the stator tooth pole. The first self-starting mechanism and the second self-starting mechanism are arranged at asymmetric positions, so that the rotor can better rotate correspondingly.
Preferably, when the control circuit generates the first current, the rotor core rotates to enable the stator teeth and the rotor teeth to be in a state that all end faces are opposite to each other, when the control circuit generates the second current, the magnetic field saturation occurs on the thin teeth protruding transversely, and the rotor core rotates to enable the stator teeth and the rotor teeth to be aligned to the central end face, so that the rotor core generates the starting torque. When different currents are applied, the alignment positions of the rotor and the stator are different, initial torque is applied to the rotor, the rotor can leave a starting dead zone, and the rotor can rotate quickly.
Preferably, two stator cores are provided. Set up two stators, the drive rotor that can be better rotates, improves the reliability of motor.
Preferably, the second current is larger than the first current. The stator and the rotor are in a full-end-face alignment state through small current, and then magnetic field saturation is generated on transversely protruding thin teeth through large current, so that the stator teeth and the rotor teeth are aligned to the central end face, a rotor core generates starting torque, and the rotor rotates quickly.
Preferably, the rotor position detection circuit is a hall sensor. The position of the rotor tooth pole is detected by the Hall sensor, so that a control circuit can conveniently judge whether the rotor tooth pole is positioned in a starting dead zone and carry out corresponding starting control.
The invention has the beneficial effects that: through setting up first self-starting mechanism and second self-starting mechanism, utilize horizontal bellied thin tooth to take place to drive the rotor tooth pole after the magnetic field saturation and rotate, solve and start the blind spot problem, cancel the permanent magnet, it is with low costs to stator coil can not produce magnetic force when the outage, can not adsorb iron fillings always, produce the hidden danger that hinders the rotor rotation or motor to damage, reduce reluctance motor's manufacturing cost and the life of extension motor.
Drawings
Fig. 1 is a schematic structural diagram of a reluctance motor according to a first embodiment of the present invention.
In the figure, 1, a stator iron core, 2, a rotor iron core, 3, a stator tooth pole, 4, a stator tooth space, 5, a magnetic ring, 6, a rotor tooth pole, 7, a first self-starting mechanism, 8 and a second self-starting mechanism are arranged.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
The first embodiment is as follows: a single-phase reluctance motor with self-starting capability is disclosed, as shown in figure 1, comprising two rotor cores 2, two stator cores 1, a magnetic ring 5, a rotor position detection circuit and a control circuit, wherein the stator cores 1 are provided with a plurality of stator teeth 3, stator tooth sockets 4 are formed among the plurality of stator teeth 3, the rotor cores 2 are nested in the stator cores 1, air gaps exist between the rotor cores 2 and the stator cores 1, the rotor cores 2 are provided with a plurality of rotor teeth 6 matched with the stator cores 1, the rotor teeth 6 are matched with the stator teeth 3, the magnetic ring 5 is arranged in the rotor cores 2, coils are arranged on the stator teeth 3 and connected with the control circuit, the rotor position detection circuit is arranged on the rotor cores 2 and used for detecting the positions of the rotor teeth 6, and is connected with the control circuit, the rotor tooth pole 6 is provided with a first self-starting mechanism 7, the stator tooth pole 3 is provided with a second self-starting mechanism 8, the first self-starting mechanism 7 and the second self-starting mechanism 8 are both thin teeth protruding transversely, the first self-starting mechanism 7 is arranged on the left side of the tail end of the rotor tooth pole 6, the second self-starting mechanism 8 is arranged on the right side of the tail end of the stator tooth pole 3, when the control circuit generates a first current, the rotor core 2 rotates to enable the stator tooth pole 3 and the rotor tooth pole 6 to be in a state that the whole end faces the rotor tooth pole, when the control circuit generates a second current, the thin teeth protruding transversely generate magnetic field saturation, the rotor core 2 rotates to enable the stator tooth pole 3 and the rotor tooth pole 6 to be aligned to the central end face, the rotor core 2 generates a starting torque, the magnitude of the second current is larger than the first current, and the rotor position detection circuit is a Hall sensor.
In the second embodiment, a single-phase reluctance motor with self-starting capability, which is different from the first embodiment in that the rotor position detection circuit of the present embodiment includes a first pole plate and a second pole plate, the first pole plate is installed on one side of the rotor tooth 6 corresponding to the stator tooth 3, the second pole plate is installed on the stator tooth 3, the second pole plate is matched with the first pole plate in position, the first pole plate, an air medium and the second pole plate form a capacitor, the first pole plate and the second pole plate are both connected with a control circuit, the capacitor formed by the first pole plate, the air medium and the second pole plate, since the distance between the first pole plate and the second pole plate and the medium constant are not changed, the relative area of the first pole plate and the second pole plate changes along with the rotation of the rotor core 2, that is, the capacitance value changes correspondingly, the control circuit locates the position of the rotor tooth 6 according to the capacitance, and further, the motor is quickly started, and the rest of the structure is the same as that of the first embodiment.
The principle of the rotor core 2 rotation is that a coil is wound on a convex part of a stator, and when the coil is electrified, electromagnetic force is generated and attracts a magnetic ring 5 in the rotor to rotate the rotor; when the rotor and the stator rotate to the opposite direction of the convex part, the coil is cut off, and the rotor continues to rotate by means of inertia; when the rotor rotates to be close to the convex part of the stator, the rotor is continuously electrified and attracted to rotate continuously.
In the specific application, whether the rotor tooth pole 6 is located in a starting dead zone is judged through the position information of the rotor tooth pole 6 detected by the rotor position detection circuit, when the reluctance motor finishes the last work, the rotor position detection circuit detects the position of the rotor tooth pole 6 when the rotor iron core 2 stops rotating and records and maintains the detection result, if the rotor iron core 2 is rotated in the carrying process of the motor, the rotor position detection circuit still detects the position of the rotor tooth pole 6 and updates the recorded information, after the reluctance motor receives a starting instruction, the control circuit judges whether the rotor tooth pole 6 is located in the starting dead zone according to the latest position information of the rotor tooth pole 6 of the rotor position detection circuit, if the rotor tooth pole 6 is located in the starting dead zone, the control circuit uses small current to enable the stator iron core 1 and the rotor iron core 2 to be in a full-end-face alignment state, then, applying a large current, wherein the magnetic field saturation occurs on the transversely protruding thin teeth, and then the rotor iron core 2 rotates to enable the rotor teeth 6 and the stator teeth 3 to be aligned to the central end face, so that initial torque is provided for the rotor iron core 2, and the rotor iron core 2 starts to rotate until the rotor teeth 6 leave the starting dead zone; if the rotor teeth 6 are not in the starting dead zone, a large current is directly provided through the control circuit, so that the rotor core 2 rotates.
According to the invention, the first self-starting mechanism 7 and the second self-starting mechanism 8 are arranged, the rotor tooth 6 is driven to rotate after the magnetic field saturation is generated by utilizing the transversely protruding thin teeth, the problem of a starting dead zone is solved, the permanent magnet is eliminated, the cost is low, the stator coil can not generate magnetic force during power failure, scrap iron can not be adsorbed all the time, the hidden danger of hindering the rotation of the rotor or damaging the motor can not be generated, the production cost of the reluctance motor is reduced, and the service life of the motor is prolonged.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (4)
1. A single phase reluctance machine having self-starting capability comprising:
the rotor comprises a rotor core, a stator core, a magnetic ring, a rotor position detection circuit and a control circuit, wherein the stator core is provided with a plurality of stator teeth poles, a stator tooth socket is formed among the plurality of stator teeth poles, the rotor core is nested in the stator core, an air gap is formed between the rotor core and the stator core, the rotor core is provided with a plurality of rotor teeth matched with the stator core, the rotor teeth are matched with the stator teeth, the magnetic ring is arranged in the rotor iron core, the stator tooth pole is provided with a coil, the coil is connected with the control circuit, the rotor position detection circuit is arranged on the rotor iron core, the rotor position detection circuit is connected with the control circuit, a first self-starting mechanism is installed on the rotor tooth pole, and a second self-starting mechanism is installed on the stator tooth pole;
the first self-starting mechanism and the second self-starting mechanism are both transversely protruding thin teeth;
when the control circuit generates a first current, the rotor core rotates to enable the stator tooth pole and the rotor tooth pole to be in a state that the whole end faces, when the control circuit generates a second current, the transversely protruding thin teeth generate magnetic field saturation, and the rotor core rotates to enable the stator tooth pole and the rotor tooth pole to be aligned to the central end face, so that the rotor core generates starting torque;
the first self-starting mechanism is arranged on the left side of the tail end of the rotor tooth pole, and the second self-starting mechanism is arranged on the right side of the tail end of the stator tooth pole.
2. The single-phase reluctance machine with self-starting capability according to claim 1,
the stator core is provided with two.
3. The single-phase reluctance machine with self-starting capability according to claim 1,
the second current is larger than the first current in magnitude.
4. The single-phase reluctance machine with self-starting capability according to claim 1,
the rotor position detection circuit is a Hall sensor.
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| CN202011459898.0A CN112688444B (en) | 2020-12-11 | 2020-12-11 | Single-phase reluctance motor with self-starting capability |
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| CN202011459898.0A CN112688444B (en) | 2020-12-11 | 2020-12-11 | Single-phase reluctance motor with self-starting capability |
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| CN112688444B true CN112688444B (en) | 2021-11-26 |
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| KR20180043596A (en) * | 2016-10-20 | 2018-04-30 | (주)리큅 | Switched Reluctance Motor with Improved Rotor |
| CN106385150A (en) * | 2016-11-22 | 2017-02-08 | 华晨汽车集团控股有限公司 | Switched reluctance motor with stator partitioned two-phase 6/5 structure |
| JP2018107843A (en) * | 2016-12-22 | 2018-07-05 | トヨタ自動車株式会社 | Control device of switched reluctance motor |
| CN207638418U (en) * | 2017-12-25 | 2018-07-20 | 哈尔滨理工大学 | A kind of novel switched reluctance motor structure |
| CN108199506A (en) * | 2018-02-05 | 2018-06-22 | 江蓝（深圳）新能源科技有限公司 | 6/8 pole switching reluctance motor |
| CN108768005A (en) * | 2018-06-19 | 2018-11-06 | 安徽美芝精密制造有限公司 | Stator core, motor and compressor |
| CN108809035A (en) * | 2018-06-20 | 2018-11-13 | 石镇德 | Switched reluctance machines and vehicle power motor assembly |
| CN208754065U (en) * | 2018-06-27 | 2019-04-16 | 上海品星防爆电机有限公司 | A kind of pot motor and the air blower with the motor |
| CN208508755U (en) * | 2018-07-27 | 2019-02-15 | 常州市迈特电器有限公司 | A kind of brushless single phase motor |
| CN208608796U (en) * | 2018-08-07 | 2019-03-15 | 四川省通力德节能科技有限公司 | A kind of switched reluctance machines |
| CN209184454U (en) * | 2018-12-04 | 2019-07-30 | 山东科技大学 | A kind of short magnetic circuit switch reluctance motor of low torque ripple |
| CN209170080U (en) * | 2018-12-29 | 2019-07-26 | 长沙市开启时代电子有限公司 | Radial magnetizing permanent magnetism rotor double-pole type switched reluctance machines |
| CN209435082U (en) * | 2019-02-27 | 2019-09-24 | 长沙硕博电子科技股份有限公司 | Three-phase switch reluctance machine |
| CN209488422U (en) * | 2019-03-15 | 2019-10-11 | 长沙市开启时代电子有限公司 | Unbalanced rotor single-phase permanent switched reluctance machines |
| CN110474450A (en) * | 2019-09-09 | 2019-11-19 | 江蓝（深圳）新能源科技有限公司 | Integrated 64 pole switching reluctance motor of CVT |
| CN111064336A (en) * | 2020-01-17 | 2020-04-24 | 长沙佳浦泵业有限公司 | Brushless DC water pump motor with 4-slot 4-pole centralized winding |
| CN211405824U (en) * | 2020-01-17 | 2020-09-01 | 长沙佳浦泵业有限公司 | Brushless DC water pump motor with 4-slot 4-pole centralized winding |
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