CN202818198U - Six-phase direct-current square-wave permanent-magnet brushless motor - Google Patents
Six-phase direct-current square-wave permanent-magnet brushless motor Download PDFInfo
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- CN202818198U CN202818198U CN2012204805398U CN201220480539U CN202818198U CN 202818198 U CN202818198 U CN 202818198U CN 2012204805398 U CN2012204805398 U CN 2012204805398U CN 201220480539 U CN201220480539 U CN 201220480539U CN 202818198 U CN202818198 U CN 202818198U
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Abstract
The utility model relates to a six-phase direct-current square-wave permanent-magnet brushless motor, which comprises a controller, a bootstrap winding drive circuit, an unenergized winding inductance value detection circuit set under the excitation pulse and a brushless motor body, wherein the controller is connected with the brushless motor body via the bootstrap winding drive circuit and the unenergized winding inductance value detection circuit set under the excitation pulse respectively. According to the six-phase direct-current square-wave permanent-magnet brushless motor provided by the utility model, the phase inversion effect is the same as that of a brushless motor with a position sensor, six phases can completely eliminate torque ripple, the structure is simple and processing is facilitated.
Description
Technical field
The utility model belongs to the mechanical ﹠ electrical technology field, relates to a kind of six phase direct current square wave permanent magnetic brushless electric machines, relates in particular to a kind of direct current square wave Slotless permanent magnet brushless motor of six phase position-sensor-frees.
Background technology
In the position-sensor-free rotor-position of existing three-phase brushless motor detects, the center that has a common boundary by the magnetic pole of measuring the no power winding constantly, then the 30 ° of electrical degrees of delaying time are carried out commutation, and 30 ° of electrical degrees are relevant with motor speed, often according to the rotating speed size computation delay time, implement commutation.Such as the irregular variation of the speed that causes because of load, the delay time of calculating is just inaccurate, and particularly in low speed even the stall situation, commutation accurately is difficult to guarantee especially.
The utility model content
In order to solve the above-mentioned technical problem that exists in the background technology, the utility model provides a kind of commutation effect, six that the brushless electric machine that is equal to position sensor can be provided to eliminate mutually torque pulsation, the simple in structure and six phase direct current square wave permanent magnetic brushless electric machines being convenient to process fully.
Technical solution of the present utility model is: the utility model provides a kind of six phase direct current square wave permanent magnetic brushless electric machines, and its special character is: described six phase direct current square wave permanent magnetic brushless electric machines comprise no power winding inductance value testing circuit group and the brushless electric machine body under controller, bootstrapping winding drive circuit, the driving pulse; Described controller is respectively by the access of the no power winding inductance value testing circuit group under bootstrapping winding drive circuit and driving pulse brushless electric machine body.
No power winding inductance value testing circuit group under the above-mentioned driving pulse comprises six groups of no power winding inductance value testing circuits under the identical driving pulse; No power winding inductance value testing circuit under described every group of driving pulse is corresponding access brushless electric machine body respectively.
No power winding inductance value testing circuit under the above-mentioned driving pulse comprises that centering power supply, light-coupled isolation driving pulse source, the first motor phase voltage clamp circuit, the second motor phase voltage clamp circuit and armature inductance measure symmetrical comparison circuit; It is in parallel successively that described centering power supply, light-coupled isolation driving pulse source, the first motor phase voltage clamp circuit, the second motor phase voltage clamp circuit and armature inductance are measured symmetrical comparison circuit; Described controller access light-coupled isolation driving pulse source; Access the brushless electric machine body after described the first motor phase voltage clamp circuit and the second motor phase voltage clamp circuit parallel connection.
Above-mentioned centering power supply comprises power input, earth terminal, the first resistance, the second resistance, voltage-stabiliser tube and electric capacity; Described power input accesses respectively voltage-stabiliser tube and electric capacity by the first resistance; Access earth terminal by the second resistance behind described voltage-stabiliser tube and the Capacitance parallel connection;
Described light-coupled isolation driving pulse source comprises the first photoelectrical coupler, the 3rd resistance, the 4th resistance, the first triode and the second triode; Described the 3rd resistance is by the first photoelectrical coupler access controller; Described the first resistance accesses the second resistance by the 4th resistance and the first photoelectrical coupler successively; Described the first resistance accesses the second resistance by the first triode and the second triode successively; Described the first triode is in parallel with the 4th resistance; Described the second triode is in parallel with the first photoelectrical coupler;
Described the first motor phase voltage clamp circuit comprises the second diode, the 3rd diode and the 5th resistance; Described the 5th resistance links to each other with the first resistance by the second diode; Described the 5th resistance links to each other with the second resistance by the 3rd diode; Described the 5th resistance accesses respectively the first triode and the second triode;
Described the second motor phase voltage clamp circuit comprises the 6th resistance, the 4th diode and the 5th diode; One termination of described the 6th resistance enters the 5th resistance, and the other end is respectively by the 4th diode and the 5th diode corresponding access the first resistance and the second resistance;
Described armature inductance is measured symmetrical comparison circuit and is comprised the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the first operational amplifier, the second operational amplifier and the second photoelectrical coupler; Described the 6th resistance accesses the positive input of the first operational amplifier by the 7th resistance; Described the first resistance accesses the negative input of the first operational amplifier by the 9th resistance; The output of described the first operational amplifier accesses the positive input of the first operational amplifier by the 8th resistance; The output of described the first operational amplifier accesses the output of the second operational amplifier successively by the 14 resistance and the second photoelectrical coupler; Described the 6th resistance accesses the positive input of the second operational amplifier by the 12 resistance; Described the second resistance accesses the negative input of the second operational amplifier by the 11 resistance; The output of described the second operational amplifier accesses the positive input of the second operational amplifier by the 13 resistance; Described the links to each other with the 11 resistance by the tenth resistance with regard to resistance.
Above-mentioned brushless electric machine body comprises non-groove stator, square wave permanent magnetic rotor and stator winding; Described non-groove stator is socketed in the square wave permanent magnetic rotor exterior; Described stator winding is arranged between non-groove stator and the square wave permanent magnetic rotor and is fixed on the inwall of non-groove stator; Be provided with the slit between described stator winding and the square wave permanent magnetic rotor.
The said stator winding comprises insulation framework and armature conductor; Described armature conductor is embedded on the insulation framework; Described insulation framework is fixed on the inwall of non-groove stator.
Above-mentioned armature conductor is that the cross section is the wire of rectangle; To be that the wire of rectangle is double-layer staggered be embedded on the insulation framework in described cross section.
Above-mentioned square wave permanent magnetic rotor comprises spline tubular axis, spline magnetic pole skeleton, magnetic boots and permanent magnet; Described spline magnetic pole skeleton by spline around the outside that is arranged on the spline tubular axis; Described permanent magnet is fixed on the spline magnetic pole skeleton by the magnetic boots.
Above-mentioned permanent magnet adopts the inwardly large outer small circumference in the trapezoidal permanent magnet of staged footpath to be distributed on the magnetic boots, fixes by magnetic boots and spline magnetic pole skeleton.
Above-mentioned brushless electric machine body also comprises and is arranged on the epitrochanterian air cooling equipment of square wave permanent magnetic; Described air cooling equipment comprises wind outside device for cooling and internally air-cooled device; Described wind outside device for cooling is arranged on the ventilation duct that spline tubular axis axial direction inner and the spline tubular axis walks abreast mutually; Described internally air-cooled device comprises and is arranged on the epitrochanterian narrow slit of square wave permanent magnetic, is arranged on finedraw on the spline magnetic pole skeleton and that connect with narrow slit; Described finedraw connects by formed slit between narrow slit and stator winding and the square wave permanent magnetic rotor.
The utility model has the advantages that:
Operation principle and the control method of the direct current square wave Slotless permanent magnet brushless motor of six phase position-sensor-frees provided by the utility model, be that mainly controller controls the break-make of each phase stator winding according to rotor-position, the winding that realization enters magnetic flux density reduction zone cuts off the power supply mutually, when the winding of outage is in the center of magnetic pole boundary mutually, the adjacent mutually energising of leaving, the adjacent mutually outage that enters, such six can eliminate the torque pulsation problem mutually fully.The utility model arrives the center that magnetic pole has a common boundary in order to eliminate existing position-sensor-free three-phase brushless motor from the no power winding, the 30 ° of electrical degrees of delaying time are carried out commutation and are difficult to the accurately problem of realization, and the commutation effect of the brushless electric machine that is equal to position sensor can be provided; And six eliminate torque pulsation mutually fully; The integral type stator winding of double-deck rectangular conductor reduces air gap, and is simple in structure; The trapezoidal permanent magnet square wave permanent magnetic of staged rotor has better been realized square wave field, better stressed effect, has been convenient to processing, economical with materials.Because magnetic flux density reduces the width in zone less than the phase winding width of six phase windings in the direct current square wave permanent magnetic brushless electric machine of six phase position-sensor-frees of the present utility model, permanent magnet N, the width of the S utmost point is greater than two times of air gap between rotor and the stator, and make the phase in magnetic flux density reduction zone in the control mode of the present utility model and approach or enter this regional phase no power, and leave being conducted of this zone fully, thereby so that commutation magnetic flux density reduces the winding no power in zone (magnetic pole junction), avoided magnetic flux density to reduce the zone to the stressed impact of torque, making armature (stator winding) back-emf relative rotation speed is stationary value, effectively avoid the generation of torque pulsation, and avoided the integrity problem of position transducer.
Description of drawings
Fig. 1 is the circuit theory diagrams of six phase direct current square wave permanent magnetic brushless electric machines provided by the utility model;
Fig. 2 is based on magnetic field that the utility model produces and driving pulse, armature voltage, signal feedback sequential chart;
Fig. 3 is based on commutation sequential chart of the present utility model;
Fig. 4 .1 is square wave permanent magnetic rotor and the non-groove stator structural representation that the utility model adopts;
Fig. 4 .2 is the local enlarged diagram of structure shown in the A among Fig. 4 .1;
Fig. 5 .1 is brushless electric machine sectional structure schematic diagram provided by the utility model;
Fig. 5 .2 is the B-B phase view of Fig. 5 .1;
Fig. 6 is brushless electric machine overall structure schematic diagram provided by the utility model;
Wherein:
The 1-non-groove stator; The 2-magnet; 3-magnetic boots; 4-spline magnetic pole skeleton; The 5-insulation framework; The 6-armature conductor; The 7-slit; The 8-narrow slit; The 9-finedraw; 10-spline tubular axis; 11-square wave permanent magnetic rotor.
Embodiment
Referring to Fig. 1, the utility model provides a kind of six phase direct current square wave permanent magnetic brushless electric machines, and this six phases direct current square wave permanent magnetic brushless electric machine comprises no power winding inductance value testing circuit group and the brushless electric machine body under controller, bootstrapping winding drive circuit, the driving pulse; Controller is respectively by the access of the no power winding inductance value testing circuit group under bootstrapping winding drive circuit and driving pulse brushless electric machine body.
No power winding inductance value testing circuit group under the driving pulse comprises six groups of no power winding inductance value testing circuits under the identical driving pulse; No power winding inductance value testing circuit under every group of driving pulse is corresponding access brushless electric machine body respectively.
No power winding inductance value testing circuit under the driving pulse comprises that centering power supply, light-coupled isolation driving pulse source, the first motor phase voltage clamp circuit, the second motor phase voltage clamp circuit and armature inductance measure symmetrical comparison circuit; It is in parallel successively that centering power supply, light-coupled isolation driving pulse source, the first motor phase voltage clamp circuit, the second motor phase voltage clamp circuit and armature inductance are measured symmetrical comparison circuit; Controller access light-coupled isolation driving pulse source; Access the brushless electric machine body after the first motor phase voltage clamp circuit and the second motor phase voltage clamp circuit parallel connection.
As shown in Figure 1, R1, R2, D1, C1 provide the centering power supply, and R1, R2 resistance value equate; R3, G1, R4, T1, T2 are light-coupled isolation driving pulse source; D2, D3, R5 are motor phase voltage clamp circuit, protection driving pulse source circuit, and R5 has inductance value measuring resistance function concurrently; R6, D4, D5 are motor phase voltage clamp circuit, the symmetrical comparison circuit of protection armature inductance electric current; Armature inductance is measured symmetrical comparison circuit by R7, R8, R9, R10, R11, R12, R13, R14, A1, A2, G2 forms, R9, R10, R11 is amplifier A1, A2 provides positive and negative benchmark, R9, the R11 resistance value equates, when the voltage that detected inductance characterizes enters central potential regional, the optocoupler conducting is sent zero cross signal to controller, just, the difference degree of the negative energize end-of-pulsing moment with the time interval of this zero cross signal rising or trailing edge reacted the distance of no power winding from magnetic pole boundary center line, confirms and send armature to drive or commutation signal by controller.
The centering power supply comprises power input, earth terminal, the first resistance, the second resistance, voltage-stabiliser tube and electric capacity; Power input accesses respectively voltage-stabiliser tube and electric capacity by the first resistance; Access earth terminal by the second resistance behind voltage-stabiliser tube and the Capacitance parallel connection;
Light-coupled isolation driving pulse source comprises the first photoelectrical coupler, the 3rd resistance, the 4th resistance, the first triode and the second triode; The 3rd resistance is by the first photoelectrical coupler access controller; The first resistance accesses the second resistance by the 4th resistance and the first photoelectrical coupler successively; The first resistance accesses the second resistance by the first triode and the second triode successively; The first triode is in parallel with the 4th resistance; The second triode is in parallel with the first photoelectrical coupler;
The first motor phase voltage clamp circuit comprises the second diode, the 3rd diode and the 5th resistance; The 5th resistance links to each other with the first resistance by the second diode; The 5th resistance links to each other with the second resistance by the 3rd diode; The 5th resistance accesses respectively the first triode and the second triode;
The second motor phase voltage clamp circuit comprises the 6th resistance, the 4th diode and the 5th diode; One termination of the 6th resistance enters the 5th resistance, and the other end is respectively by the 4th diode and the 5th diode corresponding access the first resistance and the second resistance;
Armature inductance is measured symmetrical comparison circuit and is comprised the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the first operational amplifier, the second operational amplifier and the second photoelectrical coupler; The 6th resistance accesses the positive input of the first operational amplifier by the 7th resistance; The first resistance accesses the negative input of the first operational amplifier by the 9th resistance; The output of the first operational amplifier accesses the positive input of the first operational amplifier by the 8th resistance; The output of the first operational amplifier accesses the output of the second operational amplifier successively by the 14 resistance and the second photoelectrical coupler; The 6th resistance accesses the positive input of the second operational amplifier by the 12 resistance; The second resistance accesses the negative input of the second operational amplifier by the 11 resistance; The output of the second operational amplifier accesses the positive input of the second operational amplifier by the 13 resistance; The links to each other with the 11 resistance by the tenth resistance with regard to resistance.
Referring to Fig. 4 .1, Fig. 4 .2 and Fig. 6, in order to realize square wave permanent magnetic rotor of the present utility model, non-groove stator structure, stator winding adopts inside and outside double-deck rectangular conductor, and is fixed with one with insulation framework, to improve the armature conductor cross section, to reduce radial thickness; The square wave permanent magnetic rotor adopts the inwardly large outer small circumference in the trapezoidal permanent magnet of staged footpath uniform, so that the permanent magnet width at rotor diameter place is greater than two times of void dimensions, the shortest path of the magnetic line of force has just reduced leakage field for passing stator winding, realizes more preferably square wave field; Favourable the inlaying of trapezoidal ladder of permanent magnet avoided wedge shape power, and it is simple in structure, and a plurality of permanent magnet concentric reducers interval is arranged side by side, and ladder overlaps fully, and size is in front mutually neat, just can make things convenient for, save blanking with the rectangle magnet steel; The trapezium structure of permanent magnet integral body makes the middle magnetic loop path length of the permanent magnetism magnetic pole of magneto thick corresponding with magnetic pole thickness, can improve the magnetic field uniformity coefficient; And the hierarchic structure of permanent magnet does not have the magnetic field uniform strength of substantial damage trapezium structure, does not too much increase labor content, and has improved technique and practicality.
Particularly, the brushless electric machine body comprises non-groove stator 1, square wave permanent magnetic rotor 11 and stator winding; Non-groove stator 1 is socketed in square wave permanent magnetic rotor 11 outsides; Stator winding is arranged between non-groove stator 1 and the square wave permanent magnetic rotor 11 and is fixed on the inwall of non-groove stator 1; Be provided with slit 7 between stator winding and the square wave permanent magnetic rotor 11.
Stator winding comprises insulation framework 5 and armature conductor 6; Armature conductor 6 is embedded on the insulation framework 5; Insulation framework 5 is fixed on the inwall of non-groove stator 1.Armature conductor 6 is that the cross section is the wire of rectangle; To be that the wire of rectangle is double-layer staggered be embedded on the insulation framework 5 in the cross section.Square wave permanent magnetic rotor 11 comprises spline tubular axis 10, spline magnetic pole skeleton 4, magnetic boots 3 and permanent magnet 2; Spline magnetic pole skeleton 4 by spline around the outside that is arranged on spline tubular axis 10; Permanent magnet 2 is fixed on the spline magnetic pole skeleton 4 by magnetic boots 3.Permanent magnet 2 adopts the inwardly large outer small circumference in staged trapezoidal permanent magnet 2 footpaths to be distributed on the magnetic boots 3, and is fixing with spline magnetic pole skeleton 4 by magnetic boots 3.
Referring to Fig. 5 .1 and Fig. 5 .2, of the present utility model air-cooled in order to realize, Rotor design the cold modes of two transportation work styles, the one tunnel is centrifugal interior circulation, another road is axial outer circulation.Interior circulation is when rotor rotates, by the rotor narrow slit by centrifugal force make wind on stator winding, flowing to respectively two end caps along stator and rotor clearance, be inhaled into circulation port in the rotor again ... circulate with this, with the heat band to end cap, spline tubular axis; Axially outer circulation is the wind outside circulation, and it can reduce splined tube axle temperature degree, and each self-loopa of inside and outside independence avoids water, impurity, corrosive gas to the destruction of stator winding, rotor permanent magnet, insulator.In order to realize spline magnetic pole skeleton of the present utility model, as shown in Figure 5, spline magnetic pole skeleton and spline tubular axis can make the narrow slit processing of spline magnetic pole skeleton simple by spline joint, and the convenient more suitably material of selecting respectively.
Particularly, the brushless electric machine body that adopts of the utility model also comprises the air cooling equipment that is arranged on the square wave permanent magnetic rotor 11; Air cooling equipment comprises wind outside device for cooling and internally air-cooled device; The wind outside device for cooling is arranged on the ventilation duct that spline tubular axis 10 axial directions inner and spline tubular axis 10 walk abreast mutually; Internally air-cooled device comprises the narrow slit 8 that is arranged on the square wave permanent magnetic rotor 11, be arranged on finedraw 9 on the spline magnetic pole skeleton 4 and that connect with narrow slit 8; Finedraw 9 connects by formed slit 7 between narrow slit 8 and stator winding and the square wave permanent magnetic rotor 11.
The utility model is called zero point with the center that the magnetic pole of p-m rotor has a common boundary, and six phase stator winding commutations are constantly constantly identical with no power winding zero passage, need not delay time 30 degree electrical degrees and the directly definite control of commutation is irrelevant with motor speed.
Operation principle and the control method of the direct current square wave Slotless permanent magnet brushless motor of six phase position-sensor-frees of the present utility model, be that mainly controller controls the break-make of each phase stator winding according to rotor-position, the winding that realization enters magnetic flux density reduction zone cuts off the power supply mutually, when the winding of outage is in the center of magnetic pole boundary mutually, the adjacent mutually energising of leaving, the adjacent mutually outage that enters, such six can eliminate the torque pulsation problem mutually fully.Key of the present utility model is the inductance value measuring circuit by the no power winding under the driving pulse, embodiment, as shown in Figure 1.Controller by align, the symmetrical degree of armature inductance is judged rotor-position under the negative energize pulse, and provides armature to drive control.
In order to realize control of the present utility model, the utility model provides a kind of six phase bridge-type control circuits, be applicable to the control of six phase winding brushless, permanently excited direct current motors, this main circuit will comprise the no power winding inductance value testing circuit under controller, bootstrapping winding drive circuit, the driving pulse.
Because magnetic flux density reduces the width in zone less than the phase winding width of six phase windings in the direct current square wave permanent magnetic brushless electric machine of six phase position-sensor-frees of the present utility model, permanent magnet N, the width of the S utmost point is greater than two times of air gap between rotor and the stator, and make the phase in magnetic flux density reduction zone in the control mode of the present utility model and approach or enter this regional phase no power, and leave being conducted of this zone fully, thereby so that commutation magnetic flux density reduces the winding no power in zone (magnetic pole junction), avoided magnetic flux density to reduce the zone to the stressed impact of torque, making armature (stator winding) back-emf relative rotation speed is stationary value, effectively avoid the generation of torque pulsation, and avoided the integrity problem of position transducer.
In order to realize that rotor-position of the present utility model detects, magnetic field, driving pulse, armature voltage, signal feedback sequential chart, as shown in Figure 2.The end of the positive and negative driving pulse A1 that sends from controller, the A2 of reception rise or trailing edge constantly return zero extremely constantly, the degree of consistency of these two periods is exactly the distance of rotor commutation time, the commutation that the time equates to be zero point constantly.Here the frequency of driving pulse, width can be flexibly by the controller software adjustment, the judgement of rotor-position is to provide by control software with the consistent degree of time.When the startup front motor was static, rotor-position was by measuring one by one, draw a phase that is in zero point fully or two-phase and the quantitative position of this two-phase that not exclusively is in zero point to six phase inductance amounts.This method is simple, definite, flexibly, than the position that position transducer more can carefully record rotor, just can display its advantage, the similar resolver rotor position measurement of this method of measurement effect during this static measurement rotor-position before startup.
When motor increases from the static speed that starts to, back electromotive force is along with increase, the back electromotive force of no power winding is larger away from more from dead-center position, flooded excitation pulse signal, back electromotive force is more and more less during the close dead-center position of the back electromotive force of no power winding, back electromotive force is zero when arriving dead-center position, can not affect rotor-position commutation judgement constantly.Commutation sequential of the present utility model, as shown in Figure 3.
Claims (10)
1. phase direct current square wave permanent magnetic brushless electric machine is characterized in that: described six phase direct current square wave permanent magnetic brushless electric machines comprise no power winding inductance value testing circuit group and the brushless electric machine body under controller, bootstrapping winding drive circuit, the driving pulse; Described controller is respectively by the access of the no power winding inductance value testing circuit group under bootstrapping winding drive circuit and driving pulse brushless electric machine body.
2. six phase direct current square wave permanent magnetic brushless electric machines according to claim 1, it is characterized in that: the no power winding inductance value testing circuit group under the described driving pulse comprises six groups of no power winding inductance value testing circuits under the identical driving pulse; No power winding inductance value testing circuit under described every group of driving pulse is corresponding access brushless electric machine body respectively.
3. six phase direct current square wave permanent magnetic brushless electric machines according to claim 2 is characterized in that: the no power winding inductance value testing circuit under the described driving pulse comprises that centering power supply, light-coupled isolation driving pulse source, the first motor phase voltage clamp circuit, the second motor phase voltage clamp circuit and armature inductance measure symmetrical comparison circuit; It is in parallel successively that described centering power supply, light-coupled isolation driving pulse source, the first motor phase voltage clamp circuit, the second motor phase voltage clamp circuit and armature inductance are measured symmetrical comparison circuit; Described controller access light-coupled isolation driving pulse source; Access the brushless electric machine body after described the first motor phase voltage clamp circuit and the second motor phase voltage clamp circuit parallel connection.
4. six phase direct current square wave permanent magnetic brushless electric machines according to claim 3 is characterized in that:
Described centering power supply comprises power input, earth terminal, the first resistance, the second resistance, voltage-stabiliser tube and electric capacity; Described power input accesses respectively voltage-stabiliser tube and electric capacity by the first resistance; Access earth terminal by the second resistance behind described voltage-stabiliser tube and the Capacitance parallel connection;
Described light-coupled isolation driving pulse source comprises the first photoelectrical coupler, the 3rd resistance, the 4th resistance, the first triode and the second triode; Described the 3rd resistance is by the first photoelectrical coupler access controller; Described the first resistance accesses the second resistance by the 4th resistance and the first photoelectrical coupler successively; Described the first resistance accesses the second resistance by the first triode and the second triode successively; Described the first triode is in parallel with the 4th resistance; Described the second triode is in parallel with the first photoelectrical coupler;
Described the first motor phase voltage clamp circuit comprises the second diode, the 3rd diode and the 5th resistance; Described the 5th resistance links to each other with the first resistance by the second diode; Described the 5th resistance links to each other with the second resistance by the 3rd diode; Described the 5th resistance accesses respectively the first triode and the second triode;
Described the second motor phase voltage clamp circuit comprises the 6th resistance, the 4th diode and the 5th diode; One termination of described the 6th resistance enters the 5th resistance, and the other end is respectively by the 4th diode and the 5th diode corresponding access the first resistance and the second resistance;
Described armature inductance is measured symmetrical comparison circuit and is comprised the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the first operational amplifier, the second operational amplifier and the second photoelectrical coupler; Described the 6th resistance accesses the positive input of the first operational amplifier by the 7th resistance; Described the first resistance accesses the negative input of the first operational amplifier by the 9th resistance; The output of described the first operational amplifier accesses the positive input of the first operational amplifier by the 8th resistance; The output of described the first operational amplifier accesses the output of the second operational amplifier successively by the 14 resistance and the second photoelectrical coupler; Described the 6th resistance accesses the positive input of the second operational amplifier by the 12 resistance; Described the second resistance accesses the negative input of the second operational amplifier by the 11 resistance; The output of described the second operational amplifier accesses the positive input of the second operational amplifier by the 13 resistance; Described the links to each other with the 11 resistance by the tenth resistance with regard to resistance.
5. described six phase direct current square wave permanent magnetic brushless electric machines of arbitrary claim according to claim 1-4, it is characterized in that: described brushless electric machine body comprises non-groove stator, square wave permanent magnetic rotor and stator winding; Described non-groove stator is socketed in the square wave permanent magnetic rotor exterior; Described stator winding is arranged between non-groove stator and the square wave permanent magnetic rotor and is fixed on the inwall of non-groove stator; Be provided with the slit between described stator winding and the square wave permanent magnetic rotor.
6. six phase direct current square wave permanent magnetic brushless electric machines according to claim 5, it is characterized in that: described stator winding comprises insulation framework and armature conductor; Described armature conductor is embedded on the insulation framework; Described insulation framework is fixed on the inwall of non-groove stator.
7. six phase direct current square wave permanent magnetic brushless electric machines according to claim 6, it is characterized in that: described armature conductor is that the cross section is the wire of rectangle; To be that the wire of rectangle is double-layer staggered be embedded on the insulation framework in described cross section.
8. six phase direct current square wave permanent magnetic brushless electric machines according to claim 7, it is characterized in that: described square wave permanent magnetic rotor comprises spline tubular axis, spline magnetic pole skeleton, magnetic boots and permanent magnet; Described spline magnetic pole skeleton by spline around the outside that is arranged on the spline tubular axis; Described permanent magnet is fixed on the spline magnetic pole skeleton by the magnetic boots.
9. six phase direct current square wave permanent magnetic brushless electric machines according to claim 8 is characterized in that: described permanent magnet adopts the inwardly large outer small circumference in the trapezoidal permanent magnet of staged footpath to be distributed on the magnetic boots, fixes by magnetic boots and spline magnetic pole skeleton.
10. six phase direct current square wave permanent magnetic brushless electric machines according to claim 9 is characterized in that: described brushless electric machine body also comprises and is arranged on the epitrochanterian air cooling equipment of square wave permanent magnetic; Described air cooling equipment comprises wind outside device for cooling and internally air-cooled device; Described wind outside device for cooling is arranged on the ventilation duct that spline tubular axis axial direction inner and the spline tubular axis walks abreast mutually; Described internally air-cooled device comprises and is arranged on the epitrochanterian narrow slit of square wave permanent magnetic, is arranged on finedraw on the spline magnetic pole skeleton and that connect with narrow slit; Described finedraw connects by formed slit between narrow slit and stator winding and the square wave permanent magnetic rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204805398U CN202818198U (en) | 2012-09-20 | 2012-09-20 | Six-phase direct-current square-wave permanent-magnet brushless motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204805398U CN202818198U (en) | 2012-09-20 | 2012-09-20 | Six-phase direct-current square-wave permanent-magnet brushless motor |
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| CN202818198U true CN202818198U (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012204805398U Withdrawn - After Issue CN202818198U (en) | 2012-09-20 | 2012-09-20 | Six-phase direct-current square-wave permanent-magnet brushless motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868343A (en) * | 2012-09-20 | 2013-01-09 | 西安磁林电气有限公司 | Six-phase direct-current square wave permanent-magnet brushless motor |
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2012
- 2012-09-20 CN CN2012204805398U patent/CN202818198U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868343A (en) * | 2012-09-20 | 2013-01-09 | 西安磁林电气有限公司 | Six-phase direct-current square wave permanent-magnet brushless motor |
| CN102868343B (en) * | 2012-09-20 | 2015-07-29 | 西安磁林电气有限公司 | Six phase direct current square wave permanent magnetic brushless electric machines |
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