CN106712430A - Low-temperature-drift brushless type DC tachogenerator - Google Patents
Low-temperature-drift brushless type DC tachogenerator Download PDFInfo
- Publication number
- CN106712430A CN106712430A CN201611107229.0A CN201611107229A CN106712430A CN 106712430 A CN106712430 A CN 106712430A CN 201611107229 A CN201611107229 A CN 201611107229A CN 106712430 A CN106712430 A CN 106712430A
- Authority
- CN
- China
- Prior art keywords
- temperature
- main body
- brushless
- support base
- air intake
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/0094—Structural association with other electrical or electronic devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
- H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
Abstract
The invention discloses a low-temperature-drift brushless type DC tachogenerator. The low-temperature-drift brushless type DC tachogenerator comprises a pedestal, a generator main body is installed above the pedestal, four stator iron cores are circumferentially arranged at equal intervals inside the generator main body, a groove formed between each two stator iron cores is internally provided with an excitation winding, loops of the excitation windings are connected in series with a negative-temperature-coefficient thermistor parallel network, Hall elements are placed on the axes of the excitation windings, and a rotor is arranged at a central axis position of the generator main body. According to the invention, a brushless structure is employed, defects caused by contact between a brush and a commutator and the like are eliminated, the performance is quite good, an arranged temperature sensor can detect the temperature of an inner cavity of the generator, start and stop of a blower fan are controlled, air circulation of the inner cavity is realized, the temperature is reduced, measurement errors generated due to too high temperature are reduced, through a negative-temperature-coefficient thermistor and a several times larger additional resistor, excitation resistance which changes due to a temperature rise is offset, and the velocity measurement is more accurate.
Description
Technical field
The present invention relates to tachometer generator technical field, more particularly to a kind of Low Drift Temperature brushless DC tachometer generator.
Background technology
DC tachometer generator is a kind of detecting element, and tach signal is converted into d. c. voltage signal output by it.Including
Electromagnetic type and magneto, no matter which kind of tachometer generator, its hub circuit includes brush and commutator segment, can produce corresponding contact
Resistance, influences the accuracy of measurement.DC tachometer generator in real work, change and electricity due to ambient temperature
Machine generates heat (caused by the various losses of motor) in itself, can all cause the change of Exciting Windings for Transverse Differential Protection resistance in motor.When the temperature increases,
Exciting Windings for Transverse Differential Protection resistance increases.Even if at this moment excitation voltage keeps constant, exciting current will also reduce, and magnetic flux also reduces, leads therewith
Cause induced electromotive force and the output voltage reduction of armature winding.The temperature-coefficient of electrical resistance of copper is about 0.004/ DEG C, i.e., when temperature is every
25 DEG C are raised, its resistance value accordingly increases by 10%.So, the change of temperature is to electromagnetic type DC tachometer generator output characteristics
Influence is very serious.For this, we design a kind of Low Drift Temperature brushless DC tachometer generator to solve the above problems.
The content of the invention
The invention aims to solve shortcoming present in prior art, and a kind of Low Drift Temperature brushless for proposing is straight
Stream tachometer generator.
To achieve these goals, present invention employs following technical scheme：
A kind of Low Drift Temperature brushless DC tachometer generator, including pedestal, generator main is provided with above the pedestal
Body, the equidistant circumference in inside of the generator main body is provided with four groups of stator cores, and the stator core is formed between any two
Groove in be placed with Exciting Windings for Transverse Differential Protection respectively, the thermistor that negative temperature coefficient is in series with the loop of the Exciting Windings for Transverse Differential Protection is in parallel
Network, is placed with Hall element on the axis of the Exciting Windings for Transverse Differential Protection, the cental axial position of the generator main body is provided with rotor,
The rotor is provided with perforation, and perforation and is provided with drive shaft, and one end of the drive shaft is installed on by rear bearing starts
Covered after owner's body, the other end of the drive shaft is arranged on the protecgulum of engine main body by fore bearing, and is extended to
The outside of engine main body, is provided with temperature sensor in the drive shaft between the rotor and rear bearing, described to mobilize owner
Body is provided with air intake notch near the side top of rear bearing, and air intake blower fan, the engine are provided with the air intake notch
Main body is provided with the outside of air-out notch, and air-out notch near a side-lower of fore bearing and is provided with induced draft fans.
Preferably, the air intake blower fan is identical with induced draft fans structure, and motor operation is in opposite direction, air intake blower fan and exhausting
It is mounted on that electronic cover plate is installed outside dirt filtrating screen, and dirt filtrating screen at the air port of blower fan.
Preferably, the several times greater additional resistance of a resistance value ratio Exciting Windings for Transverse Differential Protection of being connected in the loop of the Exciting Windings for Transverse Differential Protection, and
The relatively low manganin manganin alloy of additional resistance usable temp coefficient or monel are made.
Preferably, the temperature sensor, air intake blower fan and induced draft fans are electrically connected with PLC.
Preferably, the rotor is the two poles of the earth permanent-magnet steel.
Preferably, the locus phase margin electrical angle of stator core Exciting Windings for Transverse Differential Protection between any two.
Preferably, support base is provided with above the base, and support base includes the first support base and the second support base,
First support base is fixed on base, and is hollow structure, and the bottom of middle cavity is provided with damping spring, described first
Support seat is provided with opening away from one end of base, and second support base is movably installed in the middle cavity of the first support base, and
The bottom of the second support base is fixedly connected with the other end of damping spring, the one end of second support base away from the first support base
It is fixedly connected with generator main body.
Preferably, the bonnet of the generator main body is integrally formed with shell, and protecgulum is fixed by clamping screw with shell
Connection, and junction is provided with improved mat.
Preferably, the control electric current of the Hall element is total to by the Exciting Windings for Transverse Differential Protection on axis where the Hall element respectively
Give, the output end series connection of Hall element, total output voltage is four hall electromotive force sums of Hall element.
Preferably, the inner chamber of the air intake blower fan, induced draft fans, air intake notch and air-out notch and generator main body is formed
The air flow channel of connection.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention uses brushless structure, friction rotor torque is small,
Inertia is small, long lifespan, good reliability, easily safeguard, the caused defect such as do not have brush to be contacted with commutator, better performances,
The temperature of the detectable generator inner chamber of temperature sensor of setting, controls start and stop blower fan to reach the air circulation of inner chamber, reduces
Temperature, the measurement error that reduction is produced because temperature is too high, the thermistor of negative temperature coefficient and several times greater additional resistance, support
Disappear the excitation resistance changed because temperature is raised so that resistance is constant in loop so that test the speed more accurate.
Brief description of the drawings
Fig. 1 is a kind of structural representation of Low Drift Temperature brushless DC tachometer generator proposed by the present invention；
Fig. 2 is a kind of side view of Low Drift Temperature brushless DC tachometer generator proposed by the present invention；
Fig. 3 is the thermistor parallel network schematic diagram in the energized circuit of Exciting Windings for Transverse Differential Protection proposed by the present invention.
In figure：Bearing, 6 fore bearings, 7 temperature sensors, 8 are determined behind 1 pedestal, 2 generator main bodys, 3 rotors, 4 drive shafts, 5
Sub- iron core, 9 Hall elements, 10 Exciting Windings for Transverse Differential Protection, 11 air intake blower fans, 12 air intake notches, 13 induced draft fans, 14 air-out notches.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.
Reference picture 1-3, a kind of Low Drift Temperature brushless DC tachometer generator, including pedestal 1, the top of pedestal 1 is provided with
Generator main body 2, the equidistant circumference in inside of generator main body 2 is provided with four groups of stator cores 8, and stator core 8 is between any two
Exciting Windings for Transverse Differential Protection 10, the locus difference of the Exciting Windings for Transverse Differential Protection 10 between any two of stator core 8 are placed with the groove of formation respectively
90 degree of electrical angles, are in series with the thermistor parallel network of negative temperature coefficient in the loop of Exciting Windings for Transverse Differential Protection 10, Exciting Windings for Transverse Differential Protection 10
Be placed with Hall element 9 on axis, the control electric current of Hall element 9 respectively by the excitation on the place axis of Hall element 9 around
Group 10 is given altogether, the output end series connection of Hall element 9, and total output voltage is four hall electromotive force sums of Hall element 9, hair
The cental axial position of motor body 2 is provided with rotor 3, and rotor 3 is provided with perforation, and perforation and is provided with drive shaft 4, drive shaft
4 one end is covered after being installed on engine main body 2 by rear bearing 5, and the other end of drive shaft 4 is arranged on by fore bearing 6
On the protecgulum of engine main body 2, and extend to the outside of engine main body 2, the bonnet of generator main body 2 and shell one into
Type, protecgulum is fixedly connected by clamping screw with shell, and junction is provided with improved mat, between rotor 3 and rear bearing 5
Temperature sensor 7 is installed, temperature sensor 7, air intake blower fan 11 are electric with PLC with induced draft fans 13 in drive shaft 4
Property connection, engine main body 2 near rear bearing 5 side top be provided with air intake notch 12, be provided with air intake notch 12 into
Wind blower fan 11, engine main body 2 is provided with air-out notch 14 near a side-lower of fore bearing 6, and air-out notch 14 outside
Induced draft fans 13, air intake blower fan 11, induced draft fans 13, air intake notch 12 and air-out notch 14 and generator main body 1 are installed
Inner chamber forms the air flow channel of connection.
The present invention uses brushless structure, and friction rotor torque is small, inertia is small, long lifespan, good reliability, easily maintenance, does not have
The caused defect such as there is brush to be contacted with commutator, better performances, the detectable generator inner chamber of temperature sensor 7 of setting
Temperature, controls start and stop blower fan to reach the air circulation of inner chamber, reduces temperature, and the measurement that reduction is produced because temperature is too high is missed
Difference, the thermistor parallel network of negative temperature coefficient is in series with the loop of Exciting Windings for Transverse Differential Protection 10, as long as make negative temperature coefficient and
The change of resistance produced by networking network is identical with the change produced by the resistance of Exciting Windings for Transverse Differential Protection 10 of positive temperature coefficient, energized circuit
All-in resistance would not be changed with temperature, thus exciting current and magnetic flux would not also be changed with temperature；Exciting Windings for Transverse Differential Protection
The several times greater additional resistance of a resistance value ratio Exciting Windings for Transverse Differential Protection of being connected in 10 loop, and additional resistance usable temp coefficient is relatively low
Manganin manganin alloy or monel are made, its resistance vary with temperature it is smaller, although so temperature change, cause excitation around
Group resistance variations, but the change of whole energized circuit all-in resistance is little, and flux change is also little so that test the speed more accurate.
Air intake blower fan 11 is identical with the structure of induced draft fans 13, and motor operation is in opposite direction, air intake blower fan 11 and induced draft fans
It is mounted on that electronic cover plate is installed outside dirt filtrating screen, and dirt filtrating screen at 13 air port.In air intake blower fan 11 and induced draft fans 13
Sealing part sets dirt filtrating screen prevents foreign matter from entering generator, influences the measurement accurate temperature of generator and uses the longevity
Life, without it is aeration-cooling when, electronic cover plate is closed automatically, has further functioned as dustproof effect.
The top of base 1 is provided with support base, and support base includes the first support base and the second support base, the first support base
Be fixed on base 1, and be hollow structure, the bottom of middle cavity is provided with damping spring, the first support base away from base 1 one
End be provided with opening, the second support base is movably installed in the middle cavity of the first support base, and the bottom of the second support base with subtract
The other end for shaking spring is fixedly connected, and the second support base is fixedly connected with generator main body 2 away from one end of the first support base.Hair
Motor can operationally, usually produce slight vibrations, get off for a long time, and generator all parts may or loosen, and influence generates electricity
The service life of machine, the first support base, the second support base and damping spring effectively reduce the vibrations of generator.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its
Inventive concept is subject to equivalent or change, should all be included within the scope of the present invention.
Claims (10)
1. a kind of Low Drift Temperature brushless DC tachometer generator, including pedestal (1), it is characterised in that the top of the pedestal (1)
Generator main body (2) is installed, the equidistant circumference in inside of the generator main body (2) is provided with four groups of stator cores (8), institute
State and be placed with respectively in the groove that stator core (8) is formed between any two Exciting Windings for Transverse Differential Protection (10), the Exciting Windings for Transverse Differential Protection (10) is returned
The thermistor parallel network of negative temperature coefficient is in series with road, Hall element is placed with the axis of the Exciting Windings for Transverse Differential Protection (10)
(9), the cental axial position of the generator main body (2) is provided with rotor (3), and the rotor (3) is provided with perforation, and perforation
Drive shaft (4) is installed, one end of the drive shaft (4) covers after being installed on engine main body (2) by rear bearing (5),
The other end of the drive shaft (4) passes through fore bearing (6) on the protecgulum of engine main body (2), and extends to engine
The outside of main body (2), is provided with temperature sensor (7) in the drive shaft (4) between the rotor (3) and rear bearing (5), described
Engine main body (2) is provided with air intake notch (12) near the side top of rear bearing (5), is installed on the air intake notch (12)
There is air intake blower fan (11), the engine main body (2) is provided with air-out notch (14) near a side-lower of fore bearing (6), and
Induced draft fans (13) are installed on the outside of air-out notch (14).
2. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the air intake wind
Machine (11) is identical with induced draft fans (13) structure, and motor operation is in opposite direction, the wind of air intake blower fan (11) and induced draft fans (13)
At mouthful it is mounted on that electronic cover plate is installed outside dirt filtrating screen, and dirt filtrating screen.
3. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the excitation around
Connected in the loop of group (10) the several times greater additional resistance of a resistance value ratio Exciting Windings for Transverse Differential Protection, and additional resistance usable temp coefficient compared with
Low manganin manganin alloy or monel is made.
4. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the temperature is passed
Sensor (7), air intake blower fan (11) are electrically connected with induced draft fans (13) with PLC.
5. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the rotor
(3) it is the two poles of the earth permanent-magnet steel.
6. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the stator iron
The locus of core (8) Exciting Windings for Transverse Differential Protection (10) between any two differs 90 degree of electrical angles.
7. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the base
(1) support base is provided with above, and support base includes the first support base and the second support base, first support base is fixed on
On base (1), and it is hollow structure, the bottom of middle cavity is provided with damping spring, and first support base is away from base (1)
One end is provided with opening, and second support base is movably installed in the middle cavity of the first support base, and the second support base bottom
Portion is fixedly connected with the other end of damping spring, and second support base is fixedly connected with generating away from one end of the first support base
Owner's body (2).
8. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the generator
The bonnet of main body (2) is integrally formed with shell, and protecgulum is fixedly connected by clamping screw with shell, and junction be provided with it is anti-skidding
Pad.
9. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the Hall unit
The control electric current of part (9) is given altogether by the Exciting Windings for Transverse Differential Protection (10) on axis where the Hall element (9) respectively, Hall element (9)
Output end is connected, and total output voltage is four hall electromotive force sums of Hall element (9).
10. a kind of Low Drift Temperature brushless DC tachometer generator according to claim 1, it is characterised in that the air intake
Blower fan (11), induced draft fans (13), air intake notch (12) and air-out notch (14) are formed with the inner chamber of generator main body (1) and connected
Air flow channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611107229.0A CN106712430A (en) | 2016-11-24 | 2016-11-24 | Low-temperature-drift brushless type DC tachogenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611107229.0A CN106712430A (en) | 2016-11-24 | 2016-11-24 | Low-temperature-drift brushless type DC tachogenerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106712430A true CN106712430A (en) | 2017-05-24 |
Family
ID=58936068
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611107229.0A Pending CN106712430A (en) | 2016-11-24 | 2016-11-24 | Low-temperature-drift brushless type DC tachogenerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106712430A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998872A (en) * | 2020-07-26 | 2020-11-27 | 哈尔滨理工大学 | Electrified coil magnetoelectric encoder and angle value temperature drift suppression method thereof |
| CN113162263A (en) * | 2021-05-10 | 2021-07-23 | 浙江金龙电机股份有限公司 | Motor structure for improving torque and control method |
| CN115580100A (en) * | 2022-11-17 | 2023-01-06 | 睿动(山西)科技有限公司 | Brushless direct current motor based on Hall sensor and detection method |
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| CN204244010U (en) * | 2014-11-27 | 2015-04-01 | 林展苗 | A kind of generator of good heat dissipation effect |
| CN105634234A (en) * | 2015-12-29 | 2016-06-01 | 赵浩 | Brushless DC tachometer generator |
| CN205319843U (en) * | 2015-11-24 | 2016-06-15 | 江苏威龙新能源汽车有限公司 | High accuracy micro motor for car |
-
2016
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204244010U (en) * | 2014-11-27 | 2015-04-01 | 林展苗 | A kind of generator of good heat dissipation effect |
| CN205319843U (en) * | 2015-11-24 | 2016-06-15 | 江苏威龙新能源汽车有限公司 | High accuracy micro motor for car |
| CN105634234A (en) * | 2015-12-29 | 2016-06-01 | 赵浩 | Brushless DC tachometer generator |
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| 仲伟堂: "《控制电机》", 31 August 2009, 中国矿业大学出版社 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111998872A (en) * | 2020-07-26 | 2020-11-27 | 哈尔滨理工大学 | Electrified coil magnetoelectric encoder and angle value temperature drift suppression method thereof |
| CN111998872B (en) * | 2020-07-26 | 2022-02-01 | 哈尔滨理工大学 | Electrified coil magnetoelectric encoder and angle value temperature drift suppression method thereof |
| CN113162263A (en) * | 2021-05-10 | 2021-07-23 | 浙江金龙电机股份有限公司 | Motor structure for improving torque and control method |
| CN115580100A (en) * | 2022-11-17 | 2023-01-06 | 睿动(山西)科技有限公司 | Brushless direct current motor based on Hall sensor and detection method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20170524 |