CN106411221A - Current checking and control device for motor wide speed - Google Patents
Current checking and control device for motor wide speed Download PDFInfo
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- CN106411221A CN106411221A CN201610899137.4A CN201610899137A CN106411221A CN 106411221 A CN106411221 A CN 106411221A CN 201610899137 A CN201610899137 A CN 201610899137A CN 106411221 A CN106411221 A CN 106411221A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/18—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays
- H02P25/188—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring with arrangements for switching the windings, e.g. with mechanical switches or relays wherein the motor windings are switched from series to parallel or vice versa to control speed or torque
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- Control Of Ac Motors In General (AREA)
Abstract
The present invention discloses a current checking and control device for a motor wide speed. The device comprises a PWM modulation and power driving module, a current detection module and a symmetrical winding motor, the PWM modulation and power driving module includes a plurality of driving units, at least one driving unit is connected with the symmetrical winding motor after passing through the current detection module, and the current detection module is an induction current detector or a resistor current detector. The current checking and control device for the motor wide speed can realize the accurate current measurement and exponentially increase the effective rotary speed of the motor so as to greatly improve the motor performance and improve the energy utilization ratio.
Description
Technical field
The present invention relates to electric motor and controller field, particularly relate to a kind of electric current prosecution dress for motor width speed
Put.
Background technology
It is known that in the control of motor, fast, accurately current control, enable to motor operation more efficient
With steady；The range of speeds of broadening motor, can improve motor operation efficiency.
Current detecting of the prior art mainly seals in the fixed-size resistance of resistance between phase line, then passes through measurement
The voltage at resistance R two ends, according to U=I*R (voltage=electric current * resistance), calculates the electric current in phase line.As patent publication No. is
CN103076482A, invention entitled " a kind of motor current detection device of employing arm resistance and current of electric detection method "
Chinese patent in, the emitter stage of its IGBT on three brachium pontis respective bottom brachium pontis of the converter being connected with motor
Concatenate sampling resistor between DCN, after ohmically pressure drop is amplified, send the next stage circuit for calculating current to, by
The drain current of the IGBT of this detection bottom brachium pontis, after adopting the electric current that must flow through three brachium pontis respectively, by software algorithm Lai
Calculate the three-phase current of motor.But motor is in motor process, in motor, phase current is continually changing, when electric current is less, such as
The resistance that fruit seals in is less, and the voltage at resistance two ends is also less.Because voltage measuring apparatus are in voltage less measurement model
In enclosing, certainty of measurement is relatively low, therefore leads to current measurement precision to reduce.
In addition, for the range of speeds widening motor, domestic inventor has done a lot of effort and trial.As domestic patent literary composition
Offer middle Application No.：201510508099.0, patent name is " a kind of permagnetic synchronous motor winding change-over switch " and application number
For：201510508843.7, patent name is " a kind of switchover policy based on permagnetic synchronous motor winding change-over switch ".Two
A kind of permagnetic synchronous motor changing method is all refer to, that is, permagnetic synchronous motor winding change-over switch has n set winding in patent,
Correspond to n main loop unit simultaneously, by 4n-4 switch collective effect, realize the connection in series-parallel switching that n covers winding.Windings in series
Run, if rotating speed reaches switching condition, winding switches to parallel connection by series connection；Winding parallel runs, if rotating speed reaches switching condition,
Voltage reduces, until meeting voltage-switching conditions, winding switches to series connection by parallel connection.Can be certain using technique scheme
Motor operation efficiency, the speed adjustable range of extension motor are improved on degree, and so that the demand of major loop capacity is reduced.
But technique scheme exists not enough as follows：
1. need n independent electrical source of power to power, this is costly and complicated in real world applications.Particularly supply in battery
In electric system, use multiple set of cells, be all very big trouble to charging and battery management.
2. set of cells needs to carry out switching in parallel by switch, if in battery powered system, the voltage of battery is because individual
Body difference, voltage can not possibly be essentially equal, and the internal resistance very little of battery, there is very big dash current during parallel connection,
It is easy to damage switching switch, cause unreliability to system.
3. couple n is more than the situation of 2 winding, can only have all in parallel or both states of all connecting, not have middle mistake
The state crossed, causes motor switching to have some setbacks.For n more in the case of all connected due to winding, the sensing of winding itself
Electromotive force is also just whole to be added, and it is very narrow that the velocity interval that motor works in full series connection becomes, and also cannot realize widening motor
The purpose of the range of speeds.
Therefore, the present inventor needs a kind of new technique of design badly to improve its problem.
Content of the invention
The present invention is intended to provide a kind of electric current measuring and controlling device for motor width speed, it can be realized accurate electric current and survey
Amount, and so that motor efficient rotating speed area is expanded at double, greatly improve motor performance, improve energy utilization rate.
For solving above-mentioned technical problem, the technical scheme is that：
A kind of electric current measuring and controlling device for motor width speed, including：PWM and power driver module, current detecting mould
Block and symmetric winding motor, wherein said PWM and power driver module include multiple driver elements, and wherein at least one is driven
Moving cell after described current detection module with described symmetric winding motor connection, described current detection module be vicariouss electricity
Current sensor or resistance type current detector.
Preferably, an electrical source of power module, gate drive power module and connection in series-parallel handover module are also included, wherein said
PWM and power driver module are connected with described gate drive power module, described connection in series-parallel handover module respectively；Described grid
Pole driving power module includes M road outfan, and described connection in series-parallel handover module includes N number of switch unit, and each described switching is single
The first port of unit is all connected with the positive pole of described electrical source of power module, the negative pole of its second port and described electrical source of power module
Connect, its 3rd port is connected with the outfan of described gate drive power module；Wherein M >=1, N >=1.
Preferably, each described switch unit includes the first switching switch, the second switching switch and the 3rd switching switch, its
Described in first switching switch S port be connected with the negative pole of described electrical source of power module, its D port with described second switch opens
The S port closed and described PWM and power driver module connect；The D port of described second switching switch is cut with the described 3rd
The S port changing switch connects, and the D port of described 3rd switching switch is connected with the positive pole of described electrical source of power module.
Preferably, also include a signal processing and Logic control module, its respectively with described connection in series-parallel handover module, described
PWM and power driver module, described current detection module and described symmetric winding motor connection.
Preferably, each driver element all includes a positive pole common port, a negative pole common port and gate drive power input
End, described positive pole common port is connected with the positive pole of described electrical source of power module or the 4th port of a switch unit；Described negative
Pole common port is connected with the negative pole of described electrical source of power module or the 3rd port of a switch unit；Described gate drive power
Input is connected with an outfan of described gate drive power module.
Preferably, described driver element is full bridge driving circuit or multichannel half-bridge drive circuit.
Preferably, described first switching switch and/or described second switching switch and/or described 3rd switching switch are machine
Tool contact switch or electrical switch.
Preferably, described gate drive power module also includes the first common port and the second common port, and wherein said first
Common port is connected with the positive pole of described electrical source of power module, and described second common port is connected with the negative pole of described electrical source of power module
Connect.
Preferably, described gate drive power module also includes the first common port and the second common port, and wherein said first
Common port and described second common port are connected with an external power supply.
Using technique scheme, the present invention at least includes following beneficial effect：
Electric current measuring and controlling device for motor width speed of the present invention, it can realize accurate current measurement, and
So that motor efficient rotating speed area is expanded at double, greatly improve motor performance, improve energy utilization rate.
Brief description
Fig. 1 a is the structural representation of the electric current measuring and controlling device for motor width speed of the present invention；
Fig. 1 b is the structural representation of the electric current measuring and controlling device for motor width speed of the present invention；
Fig. 2 a is the circuit diagram of the electric current measuring and controlling device for motor width speed of the present invention；
Fig. 2 b is the circuit diagram of the electric current measuring and controlling device for motor width speed of the present invention；
Fig. 3 a is the circuit diagram of PWM of the present invention and power driver module；
Fig. 3 b is the circuit diagram of PWM of the present invention and power driver module；
Fig. 4 a isolates the circuit diagram of regulated power supply for single phase transformer multichannel；
Fig. 4 b isolates the circuit diagram of regulated power supply for multiple transformers multichannel；
Fig. 5 a-5c is schematic equivalent circuit during full series connection；
Fig. 6 a-6c is schematic equivalent circuit during full parallel connection；
Fig. 7 a-7c is 2 and schematic equivalent circuit during 2 series connection；
Fig. 8 is switching flow figure.
Wherein：1. electrical source of power module, 2. signal processing and Logic control module, 3. connection in series-parallel handover module, 4.PWM adjusts
System and power driver module, 5. gate drive power module, 6. current detection module, 7. symmetric winding motor, 8. magnet ring, 9. electricity
Stream Hall element.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
As illustrated in figs. ia and ib, for meeting a kind of electric current measuring and controlling device for motor width speed of the present invention, including：
PWM and power driver module 4, current detection module 6 and symmetric winding motor 7, wherein said PWM and power drive
Module 4 includes multiple driver elements, wherein at least one driver element pass through after described current detection module 6 with described symmetrical around
Group motor 7 connects, and described current detection module 6 is induction type current detector or resistance type current detector.
It is known that Hall effect defines the relation between magnetic field and induced voltage, this effect and traditional sensing
Effect is entirely different.When electric current is by a conductor being located in magnetic field, magnetic field can produce one to the electronics in conductor
Active force on the individual direction perpendicular to electron motion, thus produce voltage difference at the two ends of conductor.Hall current sensor is exactly
Using Hall effect, high current is transformed to the sensor of secondary small voltage signal, its certainty of measurement is high, response quickly,
Especially can run up and have the multiwinding machine of multiple connection in series-parallel forms to be suitable for.
In a preferred embodiment, as shown in Figure 2 a, an electrical source of power module 1, gate drive power module 5 and are also included
Connection in series-parallel handover module 3, wherein said PWM and power driver module 4 respectively with described gate drive power module 5, institute
State connection in series-parallel handover module 3 to connect；Described gate drive power module 5 includes M road outfan, described connection in series-parallel handover module 3
Including N number of switch unit, the first port of each described switch unit is all connected with the positive pole of described electrical source of power module 1, its
Second port is connected with the negative pole of described electrical source of power module 1, the output of its 3rd port and described gate drive power module 5
End connects；Wherein M >=1, N >=1.In another preferred embodiment, as shown in Figure 2 b, described PWM and power driver module 4
Each of be equipped with a grid power supply in driver element.
Preferably, each described driver element all includes a raster data model port, this raster data model port and described grid
One output port of driving power module 5 connects.Because the output port of gate drive power module 5 is to be electrically isolated from one another
, the raster data model port of described PWM and power driver module 4 is also galvanically isolated, by using described raster data model
Power module 5 is powered for driver element, substitutes and is powered using electrical source of power, thus without using multiple independent electrical source of power,
Reduce application cost, simultaneously because the problem that the use of multiple electrical source of power is brought also can be readily solved.
In addition described symmetric winding motor 7 is that have by electrically insulating, identical multidiameter delay winding on magnetic circuit
Various motors.If number of patent application is 201110385907.0, applying for entitled " unit, driving multi-winding motor system " more
Patent documentation in, then provide a kind of specific embodiment of symmetric winding motor 7.Certainly specifically the setting of above-mentioned machine winding
Put and be intended to, in order to absolutely prove the present embodiment, be not intended to limit, any obvious variation and replacement are all in this reality
Apply within the protection domain of example.
Preferably, an electrical source of power module 1, gate drive power module 5 and connection in series-parallel handover module 3 are also included, wherein
Described PWM and power driver module 4 are respectively with described gate drive power module 5, described connection in series-parallel handover module 3 even
Connect；Described gate drive power module 5 includes M road outfan, and an input of described gate drive power module 5 is dynamic with described
The positive pole of power power module 1 connects, and earth terminal is connected with the negative pole of described electrical source of power module 1；Described connection in series-parallel handover module 3
Including N number of switch unit, the first port of each described switch unit is all connected with the positive pole of described electrical source of power module 1, its
Second port is connected with the negative pole of described electrical source of power module 1, the output of its 3rd port and described gate drive power module 5
End connects；Wherein M >=1, N >=1, more preferably M=N+1.
Preferably, each described switch unit includes the first switching switch PK (N), the second switching switch SK (N) and the 3rd
Switching switch NK (N), the S port of wherein said first switching switch is connected with the negative pole of described electrical source of power module 1, its D end
Mouth is connected with the S port of the described second switching switch and a following driver element；The D port of described second switching switch and institute
The S port stating the 3rd switching switch connects, and the D port of described 3rd switching switch is with the positive pole of described electrical source of power module 1 even
Connect.
Preferably, also include a signal processing and Logic control module 2, its respectively with described connection in series-parallel handover module 3, institute
State PWM and power driver module 4, described current detection module 6 and described symmetric winding motor 7 connect.Described first cuts
Change switch, described second switching switch, described 3rd switching switch control end all with described signal processing and logic control mould
Block 2 connects, at the control action.Preferably, described signal processing and Logic control module 2 comprise motor speed sensing for one
Device, phase current sensor and the single-chip microcomputer running motor control algorithms.
Preferably, each driver element all includes a positive pole common port, a negative pole common port and gate drive power input
End, described positive pole common port is connected with the positive pole of described electrical source of power module 1 or the 4th port of a switch unit；Described negative
Pole common port is connected with the negative pole of described electrical source of power module 1 or the 3rd port of a switch unit；Described raster data model electricity
Source input is connected with an outfan of described gate drive power module 5.Preferably, described driver element drives electricity for full-bridge
Road or multichannel half-bridge drive circuit.
Preferably, the quantity of described driver element is N+1.If each switch unit number consecutively is 1 to N, will
Each driver element number consecutively is 1 to N+1, then the positive pole common port of first driver element and described electrical source of power mould
The positive pole of block 1 connects, and the positive pole common port of second driver element is connected with the 4th port of first switch unit, class successively
Push away, the positive pole common port of N+1 driver element is connected with the 4th port of n-th switch unit.First driver element
Negative pole common port is connected with the negative pole of described electrical source of power module 1, and the negative pole common port of second driver element is cut with first
The 3rd port changing unit connects, the like, the of the negative pole common port of N+1 driver element and n-th switch unit
Three ports connect.
Preferably, described first switching switch and/or described second switching switch and/or described 3rd switching switch are machine
Tool contact switch or electrical switch.
In a preferred embodiment, described first switching switchs as in relay, metal-oxide-semiconductor, insulated gate bipolar transistor
One or more；Described second switching switchs as in diode, relay, metal-oxide-semiconductor, insulated gate bipolar transistor
Plant or multiple；Described 3rd switching switch is one of relay, metal-oxide-semiconductor, insulated gate bipolar transistor or multiple.
Preferably, described gate drive power module 5 also includes the first common port and the second common port, and wherein said first
Common port is connected with the positive pole of described electrical source of power module 1, and described second common port is connected with the negative pole of described electrical source of power module 1
Connect.
Preferably, described gate drive power module 5 also includes the first common port and the second common port, and wherein said first
Common port and described second common port are connected with an external power supply.
Preferably, described motor includes but is not limited to brushless electric machine, permagnetic synchronous motor, alternating current generator, reluctance motor, step
Stepper motor, linear electric machine.Whole system can be with wafer level packaging and thick film integrated package in addition to motor, or integrated with one
It is also possible to be distributed across multiple entities to use wire interconnection again in semiconductor chip.The present invention does not limit to its concrete packaged type
Fixed, ask those skilled in the art to know.
The principle of the invention is：In electric motor starting low-speed running, if series connection equivalent for multiple windings of motor,
Ampere-turn relation so according to coil, when the number of turn becomes many, electric current just can be relatively reduced, although this can not change motor because of resistance
The fact that the efficiency that power torque leaves the motor off during rotation is zero, but because reducing electric current, and reduce input power power, but
Improve and comprise electrical source of power, the efficiency of energy utilization of the whole electric system of controller and motor.
Also because the relation of windings in series, self induction electromotive force EφIncrease, EP-EφValue diminishes, and machine winding coil etc.
Effect impedance RfBecome big, when being adjusted to same electric current effect with PWM, dutycycle becomes big, and the peak value of pulse of electric current diminishes, various damages
Consumption also just reduces.Utilization rate with electric current improves, and motor feels hot reduces, can also be in the parameter basis of original motor
On, the appropriate torque increasing motor.
Improve in the rotating speed with motor, because of the raising of self induction electromotive force, be restricted to motor rotating speed when, multiple windings
It is reconverted into the state of connection in series-parallel mixing, when motor reaches certain speed, all of winding is all converted to parallel connection.
Reach the efficiency curve of broadening motor in this way, improve the torque capacity of motor, the motor feels hot for reduction
Amount, for the system originated for energy with battery, then extends the cruising time of battery.
The motor of simplex winding, in order to take into account efficiency during motor torque and low speed during low speed, limited the most in the past
Degree.When being mixed with Multiple coil connection in series-parallel, then can greatly extend the range of speeds of motor, and not lose during low speed
Performance.
Below the present invention is absolutely proved with a specific embodiment, but those skilled in the art it is to be understood that other
What obvious variation and adjustment are all within protection scope of the present invention.
In the preferred embodiment, described PWM and power driver module 4, general by full-bridge or three half-bridges etc.
Drive circuit forms.Fig. 3 a and 3b provides two kinds of relatively conventional circuit forms.Fig. 3 a is used for driving alternating current generator, brushless electricity
Machine etc.；Accompanying drawing 3b is used for drive stepping motor, reluctance motor etc..The raster data model of wherein each power circuit portion is powered
(VCC) all it is mutually isolated.Gate drive signal input and outfan are not ground altogether, can be with various type of isolation grid
Pole drives, such as A optocoupler type：As the HCPL-3120 of Hewlett-Packard Corporation, FOD8384 of FAIRCHILD company etc.；B Magnetic isolation type：As
ADuM6132 of ANALOG DEVICES company etc.；C non-isolated but not type altogether：As the IRS2117 of IR company, IRS2118 etc.
Flash drives.
As illustrated in figs. ia and ib, described current detection module 6 includes multiple magnet rings 8, and magnet ring 8 is arranged on described PWM and adjusts
Between system and power driver module 4 and described symmetric winding motor 7.The line of all same phases will pass through magnet ring 8 from same direction
Real phase current could correctly be sampled.Current Hall sensor 9 is located at that in magnet ring 8 opened gap, (preferably, electric current is suddenly
Your sensor 9 can use the A1363 of allegro company).Because all phase lines have the identical sense of current and phase place, so
Electric current is Downward addition.When sampling three-phase electric current, its computational methods is：
V phase current=IV(1)+IV(2)+IV(3)+……+IV(N)；
U phase current=IU(1)+IU(2)+IU(3)+……+IU(N)；
W phase current=IW(1)+IW(2)+IW(3)+……+IW(N).
Certainly, in order to cost-effective it is also possible to biphase electric current of only sampling, third phase electric current is then by formula I (W)+I
(U)+I (V)=0 calculates.Can also only sample the electric current of one of winding, be multiplied by quantity N of symmetric winding.Ability
Field technique personnel can be selected accordingly according to actual service condition and be set, and the present embodiment is not construed as limiting to this.
Described gate drive power module 5, is single phase transformer multichannel isolation regulated power supply or the isolation of multiple transformers multichannel is steady
One of voltage source.As shown in fig. 4 a, it is a single phase transformer multichannel isolation regulated power supply, as shown in Figure 4 b, be transformation more than
Device multichannel isolates regulated power supply.The two all includes the outfan that M road is electrically isolated from one another, and difference is that multiple transformers multichannel is isolated
Regulated power supply includes multiple independent PWM control units.
The present embodiment can produce multiple connection in series-parallel states.As such as Fig. 5 a to the 5c institute of equivalent circuit during its full series connection
Show；When the described first switching switch and described 3rd switching switch are closed, described second switching switch is got through because of forward voltage drop, electricity
Stream flow direction as illustrated in figures 5 b and 5 c, is integrally formed series relationship.When all connecting, Eall=E1+E2+E3+……+EN.
Equivalent circuit during its full parallel connection is as shown in Fig. 6 a to 6c.When the described first switching switch and the described 3rd is cut
Change switch to open, described second switching switch cuts out, and current direction as shown in figs. 6b and 6c, is integrally formed parallel relationship.All
When in parallel, Eall=E1=E2=E3...=EN.
As N=3, equivalent circuit during its 2 and 2 string is as shown in Fig. 7 a to 7c.Now, the first driver element and the 3rd drive
The switching on off state of moving cell is consistent, is all that the first switching switch cuts out with the 3rd switching switch, the second switching switch is opened；
Second driver element is then in contrast.Now Eall=E1+E2=E3+E4.If the numerical value of certain N is bigger, may also provide more
Different connection in series-parallel state, you can be located at all transitive states in parallel or all connecting between both states to provide, keep away
Exempt from motor switching to have some setbacks.For multiple different connection in series-parallel state those skilled in the art disclosed in the present embodiment on the basis of complete
Entirely can know, the present embodiment does not just repeat one by one herein.
Switching for windings multiple in the present embodiment has different strategies, as follows：
1. people is to provide setting gear.
2. the size according to counter electromotive force is switching.
3. the rotating speed according to motor is switching.
4. the size according to electric machine phase current is switching.
No matter (concrete mode those skilled in the art of above-mentioned switching can make which kind of switching mode above according to actual
Use situation sets itself, the present embodiment is not construed as limiting to this) will pay close attention to that motor each winding in rotating through kind produces anti-
The magnitude of voltage of electromotive force E (N), because when machine winding is from parallel connection to series connection switching, the anti-electricity of the winding generation of all series connection
Kinetic potential is to be added, for ensureing total counter electromotive force E after switchingallWith supply voltage EPDo not differ too many, E to be detectedallVoltage
When value reaches suitable numerical value, could execute by the switching command being parallel to series connection.
Because each winding of motor is symmetrical, the counter electromotive force producing is also essentially identical, both E (1)=E
(2)=...=E (N) is it is only necessary to measure the magnitude of voltage of any one winding, wherein PWM and power driver module
(N) negative pole common port P_COM is to be connected on electrical source of power ground wire all the time, and the voltage of its counter electromotive force E (N) is also with ground wire
It is reference, detection facilitates and low cost the most.And other winding is due to series-parallel change, voltage is to suspend, measurement
Isolation method to be used.
When from series connection to switching in parallel, due to there is not counter electromotive force addition, can be without consideration.
No matter because with relay or semiconductor power pipe, as switching switch, its switching process has the regular hour
Postpone delay.In switching state, its switch is divided into two types by function, and 1：Tandem tap SK, 2：Paralleling switch PK,
NK.This two class switch can not action simultaneously, in case occur power positive cathode short circuit.
In switching, a delay time to be waited, after allowing a kind of type of switch originally having already turned on thoroughly to close,
A further type of switch just can be opened.And same type of switch is to open and close without considering that switch prolongs simultaneously
Late problem, this delay time numerical value according to switch different suitably adjust, within relay is generally 200ms, IGBT or
MOSFET is different because of grid level driving current, in the range of generally 100us to 50ns.If reaching optimal switch speed, delay
Numerical value need actual measurement or calculated according to parameter.
It is presented herein below taking n=3 as a example, according to speed and counter electromotive force comprehensive descision, to switch connection in series-parallel state, Fig. 8 is to flow
The mode of journey figure is illustrating handoff procedure.
In the case that winding and PWM change connection in series-parallel relation with power driver module, because all of winding is
Symmetrical, and controlled by same group of pwm signal, after changing winding connection in series-parallel relation, simply change the equivalent of winding
Torque value under the number of turn, and same phase current, after conversion connection in series-parallel state, has following several situation for different motors：
1. there is no the motor of the opened loop control of electric current loop, such as the alternating current generator (ACM) of V/F Control Cooling and no current ring
Brushless electric machine (BLDC) etc., after changing the equivalent string parallel relationship of winding, does not have shadow to control algolithm, but can produce a certain amount of
Torque ripple.
2. for the motor having current loop control algorithm, such as the alternating current generator of permagnetic synchronous motor (PMSM) and FOC algorithm,
On the basis of original control algolithm, according to current connection in series-parallel state, to from speed PID loop or the current reference that directly gives
Value Iref, while changing winding connection in series-parallel state, it is modified with one group of corresponding coefficient.
For motor, the result controlling essence to phase current is exactly the control to motor torque, different motor,
The computing formula of electric current and torque is different it is also possible to nonlinear.If brushless is machine and permagnetic synchronous motor, by
In the characteristic close to brush direct current motor, its current torque curve also approximately linear, can be directly according to series-parallel multiple proportion
Take KiValue, as shown below：
When parallel connection entirely, Ki=1；
During two and two strings, Ki=2；
When whole string, Ki=4；
Iref=Iref*Ki；(C language from assignment expression way)
Corrected IrefEnter back into the anti-PARK conversion of next step.
3. need the no Hall brushless motor of the parameter of electric machine, permagnetic synchronous motor controls, control with the FOC that exchanges of encoderless
System, the parameter of electric machine typically used has, phase inductance, phase resistance and induction electromotive force, is needing to calculate this amount to carry out nothing suddenly
The algorithm that you run, phase inductance, phase resistance, induction electromotive force, after connection in series-parallel switching, the Parameters variation above winding is whole
Multiple, so only need to be multiplied by a correction factor after switching.Algorithm those skilled in the art of its correction factor
It is to be understood that here is omitted.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple modifications to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and be to fit to and principles disclosed herein and features of novelty phase one
The scope the widest causing.
Claims (9)
1. a kind of electric current measuring and controlling device for motor width speed is it is characterised in that include：PWM and power driver module, electricity
Stream detection module and symmetric winding motor, wherein said PWM and power driver module include multiple driver elements, wherein extremely
A few driver element after described current detection module with described symmetric winding motor connection, described current detection module is
Induction type current detector or resistance type current detector.
2. be used for as claimed in claim 1 the electric current measuring and controlling device of motor width speed it is characterised in that：Also include an electrical source of power
Module, gate drive power module and connection in series-parallel handover module, wherein said PWM and power driver module respectively with described
Gate drive power module, described connection in series-parallel handover module connect；Described gate drive power module includes M road outfan, institute
State connection in series-parallel handover module and include N number of switch unit, the first port of each described switch unit all with described electrical source of power mould
The positive pole of block connects, and its second port is connected with the negative pole of described electrical source of power module, its 3rd port and described raster data model
The outfan of power module connects；Wherein M >=1, N >=1.
3. be used for as claimed in claim 2 the electric current measuring and controlling device of motor width speed it is characterised in that：Each described switch unit
Including first switching switch, second switching switch and the 3rd switching switch, wherein said first switching switch S port with described
The negative pole of electrical source of power module connects, and the S port that its D port is switched with described second switching and described PWM and power are driven
Dynamic model block connects；The D port of described second switching switch is connected with the S port of the described 3rd switching switch, described 3rd switching
The D port of switch is connected with the positive pole of described electrical source of power module.
4. be used for as claimed in claim 3 the electric current measuring and controlling device of motor width speed it is characterised in that：Also include a signal processing
With Logic control module, its respectively with described connection in series-parallel handover module, described PWM and power driver module, described electric current
Detection module and described symmetric winding motor connection.
5. the described electric current measuring and controlling device for motor width speed as arbitrary in claim 2-4 it is characterised in that：Each driving is single
Unit all includes a positive pole common port, a negative pole common port and gate drive power input, and described positive pole common port is dynamic with described
4th port of the positive pole of power power module or a switch unit connects；Described negative pole common port and described electrical source of power module
Negative pole or a switch unit the 3rd port connect；Described gate drive power input and described gate drive power mould
One outfan of block connects.
6. the described electric current measuring and controlling device for motor width speed as arbitrary in claim 1-5 it is characterised in that：Described driving is single
Unit is full bridge driving circuit or multichannel half-bridge drive circuit.
7. be used for as claimed in claim 3 the electric current measuring and controlling device of motor width speed it is characterised in that：Described first switching switch
And/or described second switching switch and/or described 3rd switching switch are switch with mechanical contact or electrical switch.
8. be used for as claimed in claim 2 the electric current measuring and controlling device of motor width speed it is characterised in that：Described gate drive power
Module also includes the first common port and the second common port, and wherein said first common port is connected with the positive pole of described electrical source of power module
Connect, described second common port is connected with the negative pole of described electrical source of power module.
9. be used for as claimed in claim 2 the electric current measuring and controlling device of motor width speed it is characterised in that：Described gate drive power
Module also includes the first common port and the second common port, wherein said first common port and described second common port and an external electricity
Source connects.
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| CN201610899137.4A CN106411221B (en) | 2016-10-14 | 2016-10-14 | Current detection and control device for wide speed of motor |
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| CN201610899137.4A CN106411221B (en) | 2016-10-14 | 2016-10-14 | Current detection and control device for wide speed of motor |
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| CN106411221B (en) | 2020-11-24 |
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