CN105529894A - Brushless direct current motor and control circuit therefor - Google Patents
Brushless direct current motor and control circuit therefor Download PDFInfo
- Publication number
- CN105529894A CN105529894A CN201610006529.3A CN201610006529A CN105529894A CN 105529894 A CN105529894 A CN 105529894A CN 201610006529 A CN201610006529 A CN 201610006529A CN 105529894 A CN105529894 A CN 105529894A
- Authority
- CN
- China
- Prior art keywords
- permanent magnet
- main shaft
- encoder
- brshless
- direct current
- 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.)
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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
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The invention relates to a brushless direct current motor and a control circuit therefor. The brushless direct current motor comprises a main shaft, a first bearing and supporting frame, a belt wheel, a base, a case, a magnet holder, electromagnets, permanent magnets, a shaft sleeve, a second bearing and supporting frame, and an encoder; the brushless direct current motor is characterized in that the magnet holder is arranged on the main shaft; the magnet holder is divided into 20 grooves along the circumferential direction; the permanent magnets are fixed in the grooves; the permanent magnets are cuboid-like permanent magnets preferably; the electromagnets are fixedly arranged on the inner wall of the case along the circumferential direction; the electromagnets and the permanent magnets are parallel and opposite; certain gaps exist among the electromagnets and the permanent magnets, and different polarities of the electromagnets and the permanent magnets are arranged in opposite; and one end of the encoder is fixedly connected with the main shaft while the other end of the encoder is connected with the case. The encoder is adopted for controlling the on-off of the electromagnets to enable a rotor to perform continuous and stable external work applying under an electrically neutral condition; and the problems of a troublesome reversing apparatus and difficulty in maintenance and overhaul existing in the conventional brushless direct current motor with an electrified rotor part are solved by the brushless direct current motor provided by the invention.
Description
Technical field
The present invention relates to direct current machine field, provide a kind of brshless DC motor and control circuit thereof.
Background technology
At present, existing most of direct current machine by commutator and brushgear, the electric current in coil is constantly changed, and forms electromagnetic force, thus make rotor stressed and produce torque in stator field, and rotor produces and rotates then.But the rotor portion of this motor is in electriferous state, and brushgear and commutator must constantly slide, and could change the electric current in armature coil, make the rotation that motor continues.Its process is very loaded down with trivial details, easily occurs electric spark, and mechanical wear is serious, easy break-down, and repair and maintenance is inconvenient, and complex structure, cost is high.
Summary of the invention
Embodiments provide a kind of brshless DC motor and control circuit thereof, charged solve at least conventional brushless DC rotor part, reversing arrangement is loaded down with trivial details, the problem of Maintenance and Repair difficulty.
According to an aspect of the embodiment of the present invention, provide a kind of brshless DC motor, comprise: main shaft (1), described main shaft (1) is provided with magnet retainer (6), and have coaxially being fixedly connected with of magnet retainer (6) and described main shaft (1) described in being realized by axle sleeve (9), wherein, described magnet retainer (6) is evenly provided with multiple groove, and each described groove is built with permanent magnet (8); Casing (5), described casing (5) inwall is fixedly equipped with electromagnet (7); Encoder (11), wherein, described encoder (11) one end is fixedly connected with described main shaft (1), and the other end is connected with described casing (5).
Further, described electromagnet (7) is parallel relative with shown permanent magnet (8) opposed polarity, and the distance between described electromagnet (7) and described permanent magnet (8) is predeterminable range.
Further, described permanent magnet (8) arranges according to predetermined manner, and the shape of each described permanent magnet (8) is all identical with size.
Further, described permanent magnet (8) structure is class cuboid, and the magnetizing direction of described permanent magnet (8) is along card radial direction from inside to outside.
Further, the magnetic field intensity of described permanent magnet (8) is arranged from low to high successively.
According to another aspect of the embodiment of the present invention, additionally provide a kind of control circuit of brshless DC motor, comprise brshless DC motor any one of foregoing.
In embodiments of the present invention, adopt main shaft (1), described main shaft (1) is provided with magnet retainer (6), and have coaxially being fixedly connected with of magnet retainer (6) and described main shaft (1) described in being realized by axle sleeve (9), wherein, described magnet retainer (6) is evenly provided with multiple groove, and each described groove is built with permanent magnet (8); Casing (5), described casing (5) inwall is fixedly equipped with electromagnet (7); Encoder (11), wherein, described encoder (11) one end is fixedly connected with described main shaft (1), the mode that the other end is connected with described casing (5), reach make encoder (11) can with main shaft (1) coaxial rotation, the object be fixed on casing (5) that again can be stable, thus achieve the operation making encoder (11) control described direct current machine at any time.And then solve the technical problem causing the technical problem of Maintenance and Repair difficulty because conventional motors rotor portion is charged.
Accompanying drawing explanation
fig. 1for the integrally-built signal of the brshless DC motor of the embodiment of the present invention
figure;
fig. 2for the magnet retainer of the brshless DC motor of the embodiment of the present invention and the signal of permanent magnet arrangement
figure;
fig. 3for the permanent magnet field intensity of the brshless DC motor of the embodiment of the present invention is different, the identical stressed signal of arranging successively of shape, size
figure;
fig. 4for the signal of the control circuit of the brshless DC motor of the embodiment of the present invention
figure.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with in the embodiment of the present invention
accompanying drawing, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, specification of the present invention and claims and above-mentioned
in accompanying drawingterm " first ", " second " etc. be for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so that embodiments of the invention described herein can with except here
diagramor describe those beyond order implement.
In embodiments of the present invention,
fig. 1in, 1 be main shaft, 2 be clutch shaft bearing and bracing frame, 3 be belt wheel, 4 be base, 5 be casing, 6 be magnet retainer, 7 be electromagnet, 8 be permanent magnet, 9 be encoder for axle sleeve, 10 is the second bearing and bracing frame, 11.
According to the embodiment of the present invention, provide a kind of brshless DC motor.
fig. 1for the integrally-built signal of the brshless DC motor of the embodiment of the present invention
figure,
as Fig. 1shown in, comprising:
Main shaft (1), described main shaft (1) is provided with magnet retainer (6), and have coaxially being fixedly connected with of magnet retainer (6) and described main shaft (1) described in being realized by axle sleeve (9), wherein, described magnet retainer (6) is evenly provided with multiple groove, and each described groove is built with permanent magnet (8);
Casing (5), described casing (5) inwall is fixedly equipped with electromagnet (7);
Encoder (11), wherein, described encoder (11) one end is fixedly connected with described main shaft (1), and the other end is connected with described casing (5).
In the present invention, by the break-make of encoder (11) control circuit, make permanent magnet (8) and electromagnet (7) produce torque, and then drive main shaft (1) to rotate continually and steadily, solve the technical problem that prior art rotor externally can do work under uncharged condition.
Alternatively, described electromagnet (7) is parallel relative with shown permanent magnet (8) opposed polarity, and the distance between described electromagnet (7) and described permanent magnet (8) is predeterminable range.
Alternatively, described permanent magnet (8) arranges according to predetermined manner, and the shape of each described permanent magnet (8) is all identical with size.
Alternatively, described permanent magnet (8) structure is class cuboid, and the magnetizing direction of described permanent magnet (8) is the magnet retainer card radial direction along described direct current machine, and from inside to outside.
Alternatively, the magnetic field intensity of described permanent magnet (8) is arranged from low to high successively.
as Fig. 1shown in, whole motor horizontal positioned, casing 5 is arranged at above base 4, and is fixedly linked with base 4; Belt wheel 3 is coaxial with main shaft 1, and both is fixedly connected with, and belt wheel 3 and main shaft 1 synchronous axial system; Clutch shaft bearing and bracing frame 2, second bearing and bracing frame 10 are arranged on the two ends of main shaft 1 respectively, and are coaxially connected with main shaft 1; Clutch shaft bearing and bracing frame 2, second bearing and bracing frame 10 are embedded in casing 5 respectively, and are fixedly connected with casing 5; Main shaft 1 through magnet retainer 6 centre bore, and makes magnet retainer 6 coaxially be fixedly connected with main shaft 1 by axle sleeve 9; Magnet retainer 6 one end near the shaft shoulder, the other end and axle sleeve 9 near, and to be fixedly connected with; Permanent magnet 8 is fixing respectively loads magnet retainer 6, and circumferentially evenly stationary distribution in 20 grooves, and make the circular end face height of permanent magnet 8 opposed magnet retainer 6 consistent,
as Fig. 2shown in; Casing 5 is installed with electromagnet 7, electromagnet 7 along the even stationary distribution of casing 5 inner ring surface, and makes casing 5 and electromagnet 7 keep good insulation, and electromagnet 7 is relative with the permanent magnet 8 on magnet retainer 6, and keeps certain interval; Encoder 11 one end is fixedly connected with main shaft 1, and the other end is connected with casing 5.
Permanent magnet 8 shape, size are identical, are class cuboid, and the magnetic field intensity of permanent magnet 8 is circumferentially arranged in order from low to high.During use, according to
fig. 4circuit structure connecting circuit, guarantee that circuit connects good, and switch closes, and makes electromagnet 7 be in "on" position.During installation, guarantee that electromagnet 7 and permanent magnet 8 are near holding polarity different.
Under "on" position, electromagnet 7 produces the polarity contrary with permanent magnet 8, produces attraction between electromagnet 7 and permanent magnet 8; Permanent magnet 8 shape, size are identical, and magnetic field intensity is pressed
fig. 3strengthened gradually successively by A to T counterclockwise; After circuit ON, main shaft 1 starts to rotate under attraction effect, and Fa<Fb ... <Ft, when T permanent magnet overlaps with electromagnet 7, open circuit, after main shaft 1 turns over certain angle, makes circuit again connect.The break-make of circuit is by the program control of the single-chip microcomputer be connected with encoder 11 by finishing in advance.Main shaft 1 utilizes the attraction between permanent magnet 8 and electromagnet 7 to continue to move.
Above exemplifying embodiment illustrates, this invention effectively achieves: under the uncharged condition of rotor, and to motor input electric energy, Driving Torque externally does work.And reliable operation, stable, easy to maintenance, be convenient to control.
According to the embodiment of the present invention, provide a kind of control circuit of direct current machine,
as Fig. 4shown in, comprising: power supply 10, switch 30, controller 50, circuit protecting element 90, electromagnet 70 and encoder 110, wherein, the quantity of electromagnet 70 is multiple,
fig. 4in, closely illustrate 3, comprise electromagnet 71, electromagnet 72 and electromagnet 73.
During work, Closing Switch 30, makes electromagnet 7 produce magnetic under the control of controller 50 and encoder 110, then with permanent magnet 8 by attracting each other, produce torque.Under the effect of circuit protecting element 90, direct current machine is run continually and steadily.
In view of above-mentioned technical problem, the invention provides a kind of rotor portion of motor that makes in uncharged situation, input electric energy, export machine torque and externally do work, and be convenient to control, reliable operation, stable, Maintenance and Repair are a kind of brshless DC motor easily.
The present invention is achieved by the following technical solutions.
The present invention devises a kind of brshless DC motor, comprises main shaft, clutch shaft bearing and bracing frame, belt wheel, base, casing, magnet retainer, electromagnet, permanent magnet, axle sleeve, the second bearing and bracing frame, encoder.It is characterized in that, base is provided with casing, and is fixedly connected with casing, and the casing left and right sides is provided with bearing and bracing frame, and main shaft is positioned on bracing frame, and utilizes bearing to connect, and bearing is coaxially fixedly connected with main shaft.Main shaft is provided with magnet retainer, and magnet retainer is circumferentially evenly divided into 20 grooves, and groove is built with permanent magnet, and No. A, called after arrives T permanent magnet respectively.The arrangement mode of the permanent magnet on magnet retainer is: shape, the size of 20 permanent magnets are all identical, and permanent magnet field intensity is arranged in order from low to high, and permanent magnet successively stationary arrangement in groove.Permanent magnet structure is preferably class cuboid.The magnetizing direction of permanent magnet is consistent, all along disk body radial direction from inside to outside.Casing inner wall is circumferentially fixedly equipped with electromagnet, and electromagnet around arrangement, and makes electromagnet parallel relative with permanent magnet heteropolarity at casing inner wall, leaves certain interval between electromagnet and permanent magnet.With axle sleeve, main shaft and magnet retainer are fixed together, ensure main shaft and magnet retainer coaxial rotation, prevent magnet retainer from producing and break away.The present invention utilizes the break-make of encoder control circuit.During assembling, one end of encoder is connected with main shaft, and the other end is connected with casing, to realize accurate quick on-off.
After circuit ON, because permanent magnet field intensity increases from low to high successively, a magnetic gradient is produced between permanent magnet and electromagnet, main shaft produces machine torque under the drive of permanent magnet, permanent magnet is made to produce motion under the effect of electromagnet by encoder, thus realize input electric energy, export machine torque and externally do work.It utilizes encoder to control the break-make of electromagnet, and rotor externally can be done work under uncharged condition.
Compared with existing brshless DC motor, the advantage of brshless DC motor provided by the invention is:
1, enumerate the advantage of existing motor, that is: running is stable, and reliability is high, and vibration noise is little, can realize increasingly automated.Magnet retainer of the present invention is provided with permanent magnet, and casing inner wall is provided with electromagnet, and encoder and main shaft and casing are fixedly linked, and realize input electric energy, Driving Torque does work.Efficient region is large, power and torque density high, power factor is large, when motor runs under synchronous speed, rotor both without copper loss also without iron loss.Characteristic of low voltage is good, and torque overload characteristic is strong, and detent torque is large, and starting current is little.Speed-regulating range width, convenient operation and control is flexible, fast response time.
The problems such as 2, to solve conventional motors rotor portion charged for this brshless DC motor, and reversing arrangement is complicated, and Maintenance and Repair are inconvenient.Decrease caloric value and mechanical loss, improve energy utilization rate.The change that the present invention utilizes permanent magnet to raise successively in rotor portion magnetic field intensity, create a magnetic gradient, by encoder inductiopn rotor position, permanent magnet is made to produce motion under the effect of electromagnet, thus drive main axis, achieve and externally export machine torque under the uncharged condition of rotor.
3, structure of the present invention is simple, is easy to batch production, easy to maintenance, solves conventional motors complex structure, safeguards an inconvenient difficult problem.
4, the present invention due to main shaft portion not charged, for working under moist or liquid environment, there is extremely strong use value, by very large actual application prospect.The present invention is based on and find a kind of structure simply, mechanical loss is little, and energy utilization rate is high, and be easy to control, running is stable, brshless DC motor easy to maintenance.Instant invention overcomes conventional motors rotor portion charged, reversing arrangement is complicated, safeguards the problems such as inconvenient.Power set are made in the laboratory that can be used for education and instruction training, also can be used for industrial and mining enterprises and electric automobile makees power-equipment.
Claims (6)
1. a brshless DC motor, it is characterized in that, comprise: main shaft (1), described main shaft (1) is provided with magnet retainer (6), and have coaxially being fixedly connected with of magnet retainer (6) and described main shaft (1) described in being realized by axle sleeve (9), wherein, described magnet retainer (6) is evenly provided with multiple groove, and each described groove is built with permanent magnet (8); Casing (5), described casing (5) inwall is fixedly equipped with electromagnet (7); Encoder (11), wherein, described encoder (11) one end is fixedly connected with described main shaft (1), and the other end is connected with described casing (5).
2. brshless DC motor according to claim 1, it is characterized in that, described electromagnet (7) is parallel relative with shown permanent magnet (8) opposed polarity, and the distance between described electromagnet (7) and described permanent magnet (8) is predeterminable range.
3. brshless DC motor according to claim 1, is characterized in that, described permanent magnet (8) arranges according to predetermined manner, and the shape of each described permanent magnet (8) is all identical with size.
4. brshless DC motor according to claim 1, is characterized in that, described permanent magnet (8) structure is class cuboid, and the magnetizing direction of described permanent magnet (8) is along card radial direction from inside to outside.
5. brshless DC motor according to claim 1, is characterized in that, the magnetic field intensity of described permanent magnet (8) is arranged from low to high successively.
6. a control circuit for brshless DC motor, is characterized in that, comprises brshless DC motor according to any one of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006529.3A CN105529894A (en) | 2016-01-07 | 2016-01-07 | Brushless direct current motor and control circuit therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006529.3A CN105529894A (en) | 2016-01-07 | 2016-01-07 | Brushless direct current motor and control circuit therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105529894A true CN105529894A (en) | 2016-04-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610006529.3A Pending CN105529894A (en) | 2016-01-07 | 2016-01-07 | Brushless direct current motor and control circuit therefor |
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| Country | Link |
|---|---|
| CN (1) | CN105529894A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445358A (en) * | 2018-03-21 | 2018-08-24 | 辽宁工程技术大学 | A kind of safe arc characteristic detection device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5917261A (en) * | 1997-09-25 | 1999-06-29 | Nihon Riken Co., Ltd. | Motive power generating apparatus utilizing energy of permanent magnet |
| US20050046285A1 (en) * | 2003-08-26 | 2005-03-03 | Kohei Minato | Direct-driven magnetic rotating apparatus |
| CN103078429A (en) * | 2012-12-11 | 2013-05-01 | 内蒙古科技大学 | Brushless direct current motor |
| CN203086309U (en) * | 2012-12-11 | 2013-07-24 | 内蒙古科技大学 | DC motor |
| CN203406758U (en) * | 2012-12-11 | 2014-01-22 | 内蒙古科技大学 | Permanent-magnet direct-current motor |
| CN203607945U (en) * | 2012-12-11 | 2014-05-21 | 内蒙古科技大学 | Permanent-magnet brushless direct-current motor |
-
2016
- 2016-01-07 CN CN201610006529.3A patent/CN105529894A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5917261A (en) * | 1997-09-25 | 1999-06-29 | Nihon Riken Co., Ltd. | Motive power generating apparatus utilizing energy of permanent magnet |
| US20050046285A1 (en) * | 2003-08-26 | 2005-03-03 | Kohei Minato | Direct-driven magnetic rotating apparatus |
| CN103078429A (en) * | 2012-12-11 | 2013-05-01 | 内蒙古科技大学 | Brushless direct current motor |
| CN203086309U (en) * | 2012-12-11 | 2013-07-24 | 内蒙古科技大学 | DC motor |
| CN203406758U (en) * | 2012-12-11 | 2014-01-22 | 内蒙古科技大学 | Permanent-magnet direct-current motor |
| CN203607945U (en) * | 2012-12-11 | 2014-05-21 | 内蒙古科技大学 | Permanent-magnet brushless direct-current motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445358A (en) * | 2018-03-21 | 2018-08-24 | 辽宁工程技术大学 | A kind of safe arc characteristic detection device |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160427 |
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