CN202014175U

CN202014175U - Brushless direct current motor integrating detecting and commutating

Info

Publication number: CN202014175U
Application number: CN201020627452XU
Authority: CN
Inventors: 安跃军; 安辉; 薛丽萍; 李勇; 孟昭军
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2010-11-25
Filing date: 2010-11-25
Publication date: 2011-10-19
Anticipated expiration: 2020-11-25

Abstract

A brushless direct current motor integrating detecting and commutating comprises a stator iron core, stator windings, a rotor magnet steel, a rotor magnet yoke, a sleeve support, a rotating shaft, a bearing, a position-indication permanent magnet and a detecting-commutating device and is characterized in that the detecting-commutating device is a device integrating the detecting and the commutating. The device integrating the detecting and the commutating is formed by a first reed switch, a second reed switch, a third reed switch and a fourth reed switch which serve as detecting elements and commutating elements and are matched with the position-indication permanent magnet. The stator windings are connected in series to form a single loop winding, and two connecting terminals are U and V. The U and V are connected with a direct current power supply through the first reed switch, the second reed switch, the third reed switch and the fourth reed switch which are connected to be a bridge type, and the position-indication permanent magnet is arranged on a rotor. The device integrating the detecting and the commutating can be simplified to be formed by only one reed switch and is driven by the rotor magnet steel serving as a permanent magnet and the position-indication permanent magnet. The novel brushless direct current motor integrating the detecting and the commutating is formed by utilizing the reed switch magnet effect principle, and the motor power can reach to hundreds of kilowatts or higher.

Description

A kind of detection integrated brshless DC motor that commutates

Technical field

The utility model relates to a kind of electromechanical energy conversion device, particularly a kind ofly integrates the brshless DC motor that position probing and electric current commutate, and belongs to brshless DC motor design and manufacturing technology field.

Background technology

Brshless DC motor is made up of position detecting device, electronic commutator and motor body three parts usually, promptly the position detect and electronic commutation on task, function and structure fully independently and separate; And, realize that coordination between electronic commutation and the position probing joins and work, also need special chip and circuit such as PLC, DSP, signal processing and amplification driving, cause that whole device volume is big, components and parts are many, complex structure, poor reliability, cost an arm and a leg, be difficult to popularization.Present situation is, although brshless DC motor has been researched and developed decades, and launch products is arranged, however really use this usefulness the place and seldom not general in other words.Therefore, simple, cheap, the reliable brshless DC motor of exploitation, development and production structure be numerous potential user expect needed with market.

Summary of the invention

The purpose of this utility model just is to overcome the prior art above shortcomings, and a kind of simple in structure, cheap, reliable detection integrated brshless DC motor that commutates is provided.

The technical solution that the utility model provides is: this detection integrated brshless DC motor that commutates, comprise stator core 1, stator winding 2, rotor magnetic steel 3, rotor yoke 4, bush support 5, rotating shaft 6, bearing 7, show a permanent magnet 8 and detect reversing arrangement, be characterized in that described detection reversing arrangement is for detecting the commutation integrated apparatus, by not only making detecting element but also making the first tongue tube G1 of commutation element, the second tongue tube G2, the 3rd tongue tube G3, the 4th tongue tube G4 cooperates and shows that a permanent magnet 8 constitutes, stator winding series connection back forms the single loop winding, two terminals are U and V, through connecting into the first tongue tube G1 of bridge-type, the second tongue tube G2, the 3rd tongue tube G3 links to each other with DC power supply with the 4th tongue tube G4, shows that a permanent magnet is arranged on the rotor.

As a kind of preferred version, in the detection commutation integrated apparatus described in the utility model, different poles to tongue tube can drive by same the permanent magnet of showing, promptly detect be provided with in the commutation integrated apparatus by same show different poles that a permanent magnet 8 drives to the first tongue tube G1 and the 3rd tongue tube G3 or the second tongue tube G2 and the 4th tongue tube G4, to guarantee the synchronism of commutation.

As a kind of preferred version, in the detection commutation integrated apparatus described in the utility model, tongue tube can be driven by the rotor magnetic steel as permanent magnet, promptly detect and be provided with the first tongue tube G1, the second tongue tube G2, the 3rd tongue tube G3, the 4th tongue tube G4 that drives by rotor magnetic steel 3 in the commutation integrated apparatus as permanent magnet, show a permanent magnet thereby save, to simplify reversing arrangement, reduced volume, to reduce cost.

As a kind of preferred version, in the detection commutation integrated apparatus described in the utility model, reed switch contact two ends quench circuit in parallel, promptly detect in the commutation integrated apparatus, the first tongue tube G1, the second tongue tube G2, the 3rd tongue tube G3, two ends, the 4th tongue tube G4 contact quench circuit in parallel are as fly-wheel diode or RC series circuit.

As a kind of preferred version, detection commutation integrated apparatus described in the utility model only can be simplified to and be made of a tongue tube, and show that by rotor magnetic steel double as permanent magnet drives as permanent magnet, it is this detection integrated brshless DC motor that commutates, comprise stator core, stator winding, rotor magnetic steel, rotor yoke, bush support, rotating shaft, bearing, show a permanent magnet and detect reversing arrangement, described detection reversing arrangement is for detecting the commutation integrated apparatus, this detection commutation integrated apparatus shows that by the rotor magnetic steel double as permanent magnet the tongue tube that a permanent magnet drives constitutes, stator winding series connection back is connected with tongue tube, be connected with DC power supply again, show that a permanent magnet is arranged on the rotor.

Compared with prior art, the beneficial effects of the utility model are: a kind of simple in structure, cheap, reliable brshless DC motor technical scheme is provided, promptly utilize tongue tube magnetic effect principle to constitute a kind of novel detection commutation integrated apparatus, and being used for brshless DC motor, power of motor can reach hundreds of kilowatts or higher.

Description of drawings

Fig. 1 is for adopting one four pole external-rotor brushless direct-current electrical micro-machine body construction schematic diagram of the present utility model.

Fig. 2-1, Fig. 2-2 is for adopting stator core of the present utility model, stator winding syndeton schematic diagram.

Fig. 3 is for adopting brushless electrical micro-machine winding of four pole external-rotors of the present utility model and integrated commutator connection diagram.

Fig. 4 is for adopting the detection of the present utility model integrated commutator structure schematic diagram that commutates.

Fig. 5 is for adopting the detection of the present utility model integrated commutator driven in synchronism structural representation that commutates.

Fig. 6-1, Fig. 6-2 is for adopting tongue tube of the present utility model and the commutator structure schematic diagram that shows that a permanent magnet axially parallel is placed.

Fig. 7 is for adopting the integrated commutator connection diagram of band RC quench circuit of the present utility model.

Fig. 8 is the current waveform of the brushless DC fan motor model machine of employing the utility model technology implementation.

Fig. 9 is for adopting the brushless DC fan motor model machine torque curve of the utility model technology implementation.

Figure 10 is for adopting the brushless DC fan motor model machine steady-state speed curve of the utility model technology implementation.

Number in the figure is described as follows.1 stator core, 2 stator winding, 3 rotor magnetic steels, 4 rotor yokes, 5 bush supports, 6 rotating shafts, 7 bearings, 8 show a permanent magnet, and G1, G2, G3, G4 are first tongue tube, second tongue tube, the 3rd tongue tube, the 4th tongue tube, and A1 and X1, A2 and X2, A3 and X3 and A4 and X4 are respectively the first and last end of the every groove winding of stator.

Embodiment

Below in conjunction with the Figure of description illustrated embodiment the utility model is done and to be illustrated in greater detail.

A kind of embodiment of the present utility model is the external rotor brushless direct current micromotor, as shown in Figure 1, comprises stator core 1, stator winding 2, rotor magnetic steel 3, rotor yoke 4, bush support 5, rotating shaft 6 and bearing 7.Stator winding 2 belongs to centralized enamelled wire winding, and the pole shoe outline of stator core 1 and the interior circle of rotor magnetic steel 3 are the decentraction structure, forms non-uniform gap so that realize starting and orientation.

Stator winding 2 can have multiple connection and reversing mode, shown in Fig. 2-1, Fig. 2-2, is that reversing mode is unified in a kind of series connection, is suitable for higher supply power voltage, and characteristics are that the commutation tongue tube quantity of required work is few, the winding utilization height.Stator winding series connection back forms the single loop winding, two terminals are U and V,, the first tongue tube G1 through connecting into bridge-type, the second tongue tube G2, the 3rd tongue tube G3 link to each other with DC power supply with the 4th tongue tube G4, as shown in Figure 3, promptly constituting in twos, the conducting direct drive permanent magnetic triggers electronic commutator.Corresponding to rotor-position shown in Figure 3, the position that shows a permanent magnet 8 and detect between the commutation first tongue tube G1, the second tongue tube G2, the 3rd tongue tube G3 and the 4th tongue tube G4 of indication rotor magnetic pole position concerns as shown in Figure 4; At this moment, the first tongue tube G1, the 3rd tongue tube G3 conducting, the second tongue tube G2, the 4th tongue tube G4 turn-off, electric current flows into U end through the 3rd tongue tube G3 by winding V end from positive source and flows out and get back to power cathode through the first tongue tube G1 and constitute the loop, and the polar arc size of showing a permanent magnet has determined the conducting interval of the first tongue tube G1, the 3rd tongue tube G3.Turn over 90 degree backs, the second tongue tube G2, the 4th tongue tube G4 conducting, the first tongue tube G1, the 3rd tongue tube G3 turn-off, electric current is got back to power cathode by the outflow of winding U end inflow V end through the 4th tongue tube G4 through the second tongue tube G2 from positive source and is constituted the loop, realizes that commutation assurance motor moves continuously.As seen, tongue tube is not only as position detecting element but also conduct commutation power component, and promptly detecting element and switch element unite two into one, and it is integrated to have realized detecting commutation.

The position relation of showing a permanent magnet 8 and detecting between the commutation first tongue tube G1, the second tongue tube G2, the 3rd tongue tube G3 and the 4th tongue tube G4 also has various ways, Figure 4 shows that tongue tube and shows axially vertical tangent placement of a permanent magnet as a kind of preferred version; For guaranteeing conducting in twos and the synchronism of turn-offing tongue tube in twos, can place side by side placement with the first tongue tube G1 that works in pairs and the 3rd tongue tube G3 and the second tongue tube G2 are parallel with the 4th tongue tube G4, as shown in Figure 5, also be a kind of preferred version; Tongue tube is placed with showing a permanent magnet axially parallel, shown in Fig. 6-1, Fig. 6-2, also is a kind of preferred version, more is applicable to the motor that the element of winding is more.

Motor windings 2 has certain inductance value, cut-offs reliably in order to guarantee tongue tube, and in parallel suitable quench circuit is answered at the reed switch contact two ends in case of necessity, as fly-wheel diode or RC series circuit, as shown in Figure 7.To RC series connection quench circuit, its resistance R, capacitor C can be estimated by following formula.

The conduction duration of tongue tube is determined jointly by polar arc that shows a permanent magnet and supply voltage, and adjusting automatically, needs with stable operation and the speed governing that realizes motor, designs the maximum speed of motor according to the switching frequency of tongue tube.

Consider according to existing tongue tube technical target of the product, DRR-129 type dry-reed tube switch voltage as HAMLIN is 400V, load current can reach 6A, single tongue tube feed ability surpasses 2kW, power of motor can reach more than several kilowatts, if take collaborative work mode in parallel, power of motor accomplish tens so that up to a hundred kilowatts all be feasible.

Embodiment.

A kind of embodiment of the present utility model is the external rotor brushless dc fan motor, and Fig. 8 has provided the current waveform of this model machine, and Fig. 9 is a torque curve, and Figure 10 is the steady-state speed curve.But the operation of fan motor continous-stable illustrates that the utility model technology is feasible; From Fig. 8, Fig. 9 and Figure 10 as seen,, cause torque that pulsation is arranged, cause rotating speed slightly to fluctuate, by adjusting structure and the commutation configuration is improved because the electric current commutation has interruption.

Claims

1. one kind is detected the integrated brshless DC motor of commutation, comprise stator core (1), stator winding (2), rotor magnetic steel (3), rotor yoke (4), bush support (5), rotating shaft (6), bearing (7), show a permanent magnet (8) and detect reversing arrangement, it is characterized in that described detection reversing arrangement is for detecting the commutation integrated apparatus, by not only making detecting element but also making first tongue tube (G1) of commutation element, second tongue tube (G2), the 3rd tongue tube (G3), the 4th tongue tube (G4) cooperates and shows that a permanent magnet (8) constitutes, stator winding (2) series connection back forms the single loop winding, two terminals are U and V, through connecting into first tongue tube (G1) of bridge-type, second tongue tube (G2), the 3rd tongue tube (G3) links to each other with DC power supply with the 4th tongue tube (G4), shows that a permanent magnet (8) is arranged on the rotor.

2. the described detection integrated brshless DC motor that commutates according to claim 1, it is characterized in that detecting be provided with in the commutation integrated apparatus by same show different poles that a permanent magnet (8) drives to first tongue tube (G1) and the 3rd tongue tube (G3) or second tongue tube (G2) and the 4th tongue tube (G4).

3. the described detection integrated brshless DC motor that commutates according to claim 1 is characterized in that detecting and is provided with first tongue tube (G1), second tongue tube (G2), the 3rd tongue tube (G3), the 4th tongue tube (G4) that is driven by the rotor magnetic steel (3) as permanent magnet in the commutation integrated apparatus.

4. the described detection integrated brshless DC motor that commutates according to claim 1, it is characterized in that in the described detection commutation integrated apparatus first tongue tube (G1), second tongue tube (G2), the 3rd tongue tube (G3), the 4th tongue tube (G4) two ends, contact quench circuit in parallel.

5. one kind is detected the integrated brshless DC motor of commutation, comprise stator core (1), stator winding (2), rotor magnetic steel (3), rotor yoke (4), bush support (5), rotating shaft (6), bearing (7), show a permanent magnet (8) and detect reversing arrangement, it is characterized in that described detection reversing arrangement is for detecting the commutation integrated apparatus, this detection commutation integrated apparatus shows that by the rotor magnetic steel double as permanent magnet the tongue tube that a permanent magnet drives constitutes, stator winding series connection back is connected with tongue tube, be connected with DC power supply again, show that a permanent magnet (8) is arranged on the rotor.