CN200969555Y

CN200969555Y - Integrated brushless DC measurement generator

Info

Publication number: CN200969555Y
Application number: CN 200620200834
Authority: CN
Inventors: 陈强; 杨立
Original assignee: LINQUAN MOTOR FACTORY CHINA JIANGNAN SPACE GROUP
Current assignee: LINQUAN MOTOR FACTORY CHINA JIANGNAN SPACE GROUP
Priority date: 2006-10-12
Filing date: 2006-10-12
Publication date: 2007-10-31
Anticipated expiration: 2016-10-12

Abstract

The utility model discloses an integrated brushless direct current speed testing generator, a motor wiring and a speed testing generator wiring are arranged in an embedded manner inside the groove of the stator iron core of the brushless direct current speed testing motor, and the end cover of the brushless direct current speed testing motor is provided with a position sensor, and a tracking magnetic steel is arranged on the rotor. The utility model arranges no other additional structure except for a set of speed testing generator wiring inside the iron core groove of the stator, thus greatly simplifies the structure of traditional speed testing generator set and greatly reduces the production cost. Additionally, the utility model uses electronic direction-change to replace traditional mechanic direction-change to realize the current switch of brushless direct current motor and the voltage signal switch of brushless direct current speed testing generator, and to make the output of the speed testing generator in proportion to the voltage signal of the rotation speed and the rotation direction at the same time with the realization of continuous rotation of the motor. The utility model not only has advantages of small volume and simple and compact structure, but also has advantages of low production cost and stable working performance.

Description

Brushless DC velocity measuring dynamo

Technical field:

The utility model relates to a kind of brushless DC velocity measuring dynamo, belongs to the tachogenerator technical field.

Background technology:

At present, tachogenerator of the prior art generally adopts fabricated structure, promptly generally adopt brushless motor and have the brush tachogenerator to be combined to form the tachogenerator group, perhaps adopt brushless motor to become the tachogenerator group with alternator combination, the tachogenerator group of this fabricated structure is because the former has adopted the brush tachogenerator, and weak point, while may produce the shortcoming of spark and interference therefore to exist useful life; And the latter needs the extra turn signal that increases because the output voltage of its alternating current generator can't reflect direction of rotation, therefore exists the structure more complicated, and the also shortcoming of less stable of service behaviour; In addition, existing fabricated structure tachogenerator group also exists big, the cost of manufacture problem of higher of volume.

Summary of the invention:

The purpose of this utility model is: provide the brushless DC velocity measuring dynamo that a kind of volume is little, simple and compact for structure and cost of manufacture is lower, service behaviour is more stable, to overcome the deficiencies in the prior art.

The utility model is achieved in that

The manufacture method of brushless DC velocity measuring dynamo of the present utility model is: it has embedded motor winding and tachogenerator winding simultaneously in the stator coring groove of brushless DC motor, makes shared same stator core of brushless DC motor and brushless DC tachogenerator and same rotor and same main pole excitation magnet steel.

A kind of brushless DC velocity measuring dynamo that adopts method of the present utility model to make is: it comprises the brushless DC motor that is provided with stator core 5 and rotor 6, main pole magnet steel 7 is installed on rotor 6, embedded motor winding 1 and the tachogenerator winding 3 of being placed with of groove in the stator core 5 of brushless DC motor, and on the end cap 8 of brushless DC motor, position transducer 9 is installed, on rotor 6, is fixed with and follows the tracks of magnet steel 10.

Fixing by slot wedge 4 in the groove of the stator core 5 of brushless DC motor has slot liner body 2, and motor winding 1 and tachogenerator winding 3 embed in slot liner body 2.

Motor winding 1 is a three-phase Y type winding, and tachogenerator winding 3 is six phase windings.

Position transducer 9 is exported the signal of telecommunication respectively to electronic commutation logical operation circuit 11 and electronic analog switch circuit 12, the electronic commutation logical operation circuit 11 output signals of telecommunication are to three-phase bridge power amplification circuit 13, and the three-phase bridge power amplification circuit 13 output signals of telecommunication are to motor winding 1; The signal of telecommunication of tachogenerator winding 3 also is input to electronic analog switch circuit 12, and the electronic analog switch circuit 12 output signals of telecommunication are to the input of amplification filtering circuit 14, the output output DC signal of amplification filtering circuit 14.

Owing to adopted technique scheme, the utility model embeds motor winding and tachogenerator winding simultaneously in stator coring groove, with brushless DC motor and the shared stator core of brushless DC tachogenerator, shared main pole excitation magnet steel, common location transducer.Adopt this structure can greatly dwindle the volume of unit, except in stator coring groove, increasing by a cover tachogenerator winding, do not have to add any other structure, therefore simplified the structure of traditional tachogenerator group greatly, and greatly reduced cost of manufacture; In addition, the utility model substitutes traditional mechanical commutation with electronic commutation and realizes that the current switching of brushless DC motor and the voltage signal of brushless DC tachogenerator switch, and make motor realize the voltage signal that continuous rotation makes tachogenerator output be proportional to rotating speed and turn to simultaneously.Brushless DC motor working method of the present utility model and common brushless motor are similar, and the brushless actuator generator winding sends is alternating current, adopt electronic analog swtich to turn to the gating that carries out positive level or negative level then according to it, be spliced into and be proportional to the VD that turns to rotating speed, thereby realized the non-contact type commutation.Therefore, the utility model compared with prior art, the utility model not only has volume advantage little, simple and compact for structure, cost of manufacture is low, the advantage of stable work in work but also have.

Description of drawings:

Accompanying drawing 1 is a structural representation of the present utility model;

Accompanying drawing 2 is that motor winding of the present utility model and tachogenerator winding embed the structural representation in stator coring groove;

Accompanying drawing 3 is a control circuit schematic block diagram of the present utility model.

Embodiment:

Embodiment of the present utility model: during making, can adopt the existing brushless DC motor that is provided with stator core 5 and rotor 6 to make, its brushless DC motor can adopt 4 pairs of utmost points, the structure of 24 grooves, during making, press traditional approach main pole magnet steel 7 is installed on rotor 6, then at the embedded motor winding 1 and the tachogenerator winding 3 put of groove of the stator core 5 of brushless DC motor, in that the groove of the stator core 5 of brushless DC motor is embedded when putting motor winding 1 and tachogenerator winding 3, preferably earlier motor winding 1 and tachogenerator winding 3 are embedded in slot liner body 2, and then by slot wedge 4 slot liner body 2 is fixed and to go up in the groove of the stator core 5 of brushless DC motor, preferably motor winding 1 is turned to three-phase Y type winding by traditional mode, tachogenerator winding 3 is turned to six phase windings, because not required power output of tachogenerator, as long as guarantee manufacturability, so can select very thin enamelled wire for use, so the space that the tachogenerator winding accounts in groove is very little, almost can not consider the influence to copper factor; On the end cap 8 of brushless DC motor, install three-phase position transducer 9, this three-phase position transducer can adopt traditional Hall integrated circuit, on fixing on the rotor 6, follow the tracks of magnet steel 10, and making tracking magnet steel 10 when turning to the position of position transducer 9 with rotor 6, this position transducer 9 can be sensed the magnet steel signal; Output signal with position transducer 9 is passed to an electronic commutation logical operation circuit 11 and an electronic analog switch circuit 12 respectively then, the universal circuit that the electronic commutation logical operation circuit can be selected for use is very many, the mc33035 model of producing as Motorola Inc.

The road, and the model on the market that electronic analog switch circuit can be selected for use is also more, can two voltage power supplies and satisfy that output requires but must select for use, as the ceiling voltage scope that requires to export is ± 12V, just must selection work voltage at ± circuit 12V more than, selecting the model of Harri company production in the present embodiment for use is that eight of HI-548 selects an electronic analog switch circuit; The signal of telecommunication of electronic commutation logical operation circuit 11 outputs is received the three-phase bridge power amplification circuit 13 of a routine, and make the dc signal of these three-phase bridge power amplification circuit 13 outputs be passed to motor winding 1; The signal of telecommunication of tachogenerator winding 3 also is input to electronic analog switch circuit 12, and the output signal of telecommunication of electronic analog switch circuit 12 is received the input of an amplification filtering circuit 14, the signal of telecommunication that the output of this amplification filtering circuit 14 is exported is exactly the dc signal of expression tachogenerator rotating speed, amplification filtering circuit 14 preferably adopts the high speed and precision amplifier structure second-order active filter circuit of selling on the market, can reach extraordinary filter effect like this.

Operation principle of the present utility model is: its three-phase position transducer is according to 120 ° of electrical degrees of position relation feedback three road mutual deviations of stator and rotor, the square wave signal of telecommunication of 180 ° of electrical degrees of pulsewidth, the square wave signal of telecommunication of 60 ° of electrical degrees of output six road mutual deviations, 120 ° of electrical degrees of pulsewidth after this square wave signal of telecommunication process electronic commutation logical operation circuit computing, the switch of six power transistors of this six road square waves signal of telecommunication control three-phase bridge power amplification circuit, thereby make motor three phase windings according to certain time sequence work, the rotation of drive motors rotor; At this moment, six phase tachogenerator windings are output six road ac signals under the rotating magnetic field excitation, this six road ac signal is the flat-top trapezoidal wave signal of telecommunication with certain width, this flat-top trapezoidal wave signal of telecommunication be input to eight select an electronic analog switch circuit after, square-wave signal coding gating through the three-phase transducer, at the different out of phase flat parts of sequential gating six phase windings, every sequential gating width is 60 ° of electrical degrees, motor six time sequence status that rotated a circle, the six states gating that circulates successively, thereby be spliced into a DC level, after this DC level is passed through amplification filtering circuit suitable amplification and filtering, i.e. feedback motor speed that output meets the demands and the dc signal that turns to.

Claims

1. brushless DC velocity measuring dynamo, it comprises the brushless DC motor that is provided with stator core (5) and rotor (6), main pole magnet steel (7) is installed on rotor (6), it is characterized in that: at the embedded motor winding (1) and the tachogenerator winding (3) of being placed with of groove of the stator core (5) of brushless DC motor, and on the end cap (8) of brushless DC motor, position transducer (9) is installed, on rotor (6), is fixed with and follows the tracks of magnet steel (10).

2. brushless DC velocity measuring dynamo according to claim 1, it is characterized in that: fixing by slot wedge (4) in the groove of the stator core (5) of brushless DC motor has slot liner body (2), and motor winding (1) and tachogenerator winding (3) embed in slot liner body (2).

3. brushless DC velocity measuring dynamo according to claim 1 is characterized in that: motor winding (1) is a three-phase Y type winding, and tachogenerator winding (3) is six phase windings.

4. brushless DC velocity measuring dynamo according to claim 1, it is characterized in that: position transducer (9) is exported the signal of telecommunication respectively to electronic commutation logical operation circuit (11) and electronic analog switch circuit (12), electronic commutation logical operation circuit (11) the output signal of telecommunication is to three-phase bridge power amplification circuit (13), and three-phase bridge power amplification circuit (13) the output signal of telecommunication is to motor winding (1); The signal of telecommunication of tachogenerator winding (3) also is input to electronic analog switch circuit (12), and electronic analog switch circuit (12) the output signal of telecommunication is to the input of amplification filtering circuit (14), the output output DC signal of amplification filtering circuit (14).