CN110071672A - Field weakening control method, weak magnetic controller, current-order generator and electric machine control system - Google Patents
Field weakening control method, weak magnetic controller, current-order generator and electric machine control system Download PDFInfo
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- CN110071672A CN110071672A CN201810066704.7A CN201810066704A CN110071672A CN 110071672 A CN110071672 A CN 110071672A CN 201810066704 A CN201810066704 A CN 201810066704A CN 110071672 A CN110071672 A CN 110071672A
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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
- H02P21/00—Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation
- H02P21/22—Current control, e.g. using a current control loop
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Abstract
The present embodiments relate to a kind of field weakening control method, weak magnetic controller, current-order generator and electric machine control system, the field weakening control method includes: to calculate the corresponding exciting current range of maximum output torque range according to the maximum output voltage that the driver of motor is capable of providing；The exciting current after adjusting is limited according to the exciting current range, so that the exciting current of output is located within the scope of the exciting current.The method of the present embodiment is by limiting excitation current instruction, maximum output torque when improving motor operation more than rated frequency.
Description
Technical field
The present invention relates to motor field more particularly to a kind of field weakening control method, weak magnetic controller, current-order generators
And electric machine control system.
Background technique
When motor operation is more than rated frequency, it may occur that output voltage instructs (Us_cmd) be capable of providing greater than driver
Maximum output voltage (Us_max) the case where, it, can be by reducing exciting current (i in order to solve this cased_cmd) reduce
Us_cmdTo guarantee Us_cmdNo more than Us_max。
The prior art is directly to adjust exciting current i by proportional and integral controllerd_cmdTo guarantee Us_cmdIt is not more than
Us_max.Fig. 1 shows the working principle of existing field weakening control method, as shown in Figure 1, Us_cmdIt is that the output voltage of motor refers to
It enables, Us_maxIt is the maximum output voltage that the driver of motor is capable of providing, id_cmdIt is exciting current, PI is that proportional integration is adjusted
Device, Δ idIt is that later exciting current adjustment amount, i are adjusted by proportional and integral controller PId_cmd_weakIt is encouraging after weak magnetic calculates
Magnetoelectricity stream.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
Inventors have found that there is no the exciting current (i after calculating weak magnetic for existing field weakening control methodd_cmd_weak)
Range is done an adjustment in real time and is limited, and may cause motor maximum output due to the too small of exciting current adjustment in this way
The decline of torque reduces the torque performance for operating in the motor of rated frequency or more.
To solve the above-mentioned problems at least one, the embodiment of the invention provides a kind of field weakening control methods, weak magnetic control
Device, current-order generator and electric machine control system processed.
According to a first aspect of the embodiments of the present invention, a kind of field weakening control method is provided, which is characterized in that the method
Include:
The corresponding excitation of maximum output torque range is calculated according to the maximum output voltage that the driver of motor is capable of providing
Current range；
The exciting current after adjusting is limited according to the exciting current range, so that the exciting current of output is located at
Within the scope of the exciting current.
In one embodiment, the maximum value of the exciting current range is preset by user, the excitation electricity
Flow range minimum value is directly proportional to the maximum output voltage and turn with the parameter of electric machine of the motor and the motor
Rapid-result inverse ratio.
In one embodiment, the minimum value of the exciting current range calculates acquisition in the following manner: according to described
The revolving speed of the parameter of motor and the motor calculates minimum required for the torque capacity that the maximum output voltage can export
Exciting current.
In one embodiment, the exciting current after adjusting is limited according to the exciting current range, comprising:
If the exciting current after the adjusting is located within the scope of the exciting current, using the exciting current as institute
State the exciting current of output；
If the exciting current after the adjusting is less than the minimum value of the exciting current range, by the exciting current
Exciting current of the minimum value of range as the output；
If the exciting current after the adjusting is greater than the maximum value of the exciting current range, by the exciting current
Exciting current of the maximum value of range as the output.
According to a second aspect of the embodiments of the present invention, a kind of weak magnetic controller is provided, which is characterized in that the weak magnetic control
Device processed includes:
Exciting current range calculator calculates maximum defeated according to the maximum output voltage that the driver of motor is capable of providing
The corresponding exciting current range of torque range out；
Excitation current instruction limiter limits the exciting current after adjusting according to the exciting current range,
So that the exciting current of output is located within the scope of the exciting current.
In one embodiment, the exciting current range calculator is according to the parameter of the motor and turning for the motor
Speed calculates minimum exciting current required for the torque capacity that the maximum output voltage can export.
In one embodiment, exciting current of the excitation current instruction limiter after the adjusting is located at described encourage
When in magnetic current range, using the exciting current as the exciting current of the output；Exciting current after the adjusting is small
When the minimum value of the exciting current range, using the minimum value of the exciting current range as the excitation of output electricity
Stream；When exciting current after the adjusting is greater than the maximum value of the exciting current range, by the exciting current range
Exciting current of the maximum value as the output.
According to a third aspect of the embodiments of the present invention, a kind of current-order generator is provided, wherein the current-order
Generator includes weak magnetic controller above-mentioned.
According to a fourth aspect of the embodiments of the present invention, a kind of electric machine control system is provided, wherein the motor control system
System includes current-order generator above-mentioned.
The beneficial effects of the present invention are: by limiting the exciting current after adjusting, improves motor operation and exist
Maximum output torque when more than rated frequency.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
The embodiment of the present invention elements and features described in one drawing or one embodiment can with one or
Elements and features shown in more other attached drawings or embodiment combine.In addition, in the accompanying drawings, similar label indicates
Corresponding component in several attached drawings, and may be used to indicate corresponding component used in more than one embodiment.
Included attached drawing is used to provide to be further understood from the embodiment of the present invention, and which constitute one of specification
Point, for illustrating embodiments of the present invention, and come together to illustrate the principle of the present invention with verbal description.Under it should be evident that
Attached drawing in the description of face is only some embodiments of the present invention, for those of ordinary skill in the art, is not paying wound
Under the premise of the property made is laborious, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings:
Fig. 1 is the schematic diagram of the working principle of existing excitation control method；
Fig. 2 is the schematic diagram of the excitation control method of the embodiment of the present invention 1；
Fig. 3 is the correspondence diagram of exciting current range and maximum output torque range；
Fig. 4 is the excitation control method of the embodiment of the present invention 1 and the speed-torque characteristic ratio of existing excitation control method
Compared with schematic diagram；
Fig. 5 is the schematic diagram of the excitation controller of the embodiment of the present invention 2；
Fig. 6 is the schematic diagram of the current-order generator of the embodiment of the present invention 3；
Fig. 7 is the schematic diagram of the electric machine control system of the embodiment of the present invention 4.
Specific embodiment
Referring to attached drawing, by following specification, the aforementioned and other feature of the embodiment of the present invention be will be apparent.?
In following description and drawings, the particular implementation of the embodiment of the present invention is specifically disclosed, which show can wherein use
The some embodiments of the principle of the embodiment of the present invention, it will thus be appreciated that the embodiment of the present invention is not limited to described embodiment party
Formula, on the contrary, the embodiment of the present invention includes the whole modifications, modification and the equivalents that fall within the scope of the appended claims.
In embodiments of the present invention, term " first ", " second " etc. are used to distinguish different elements from appellation, but
It is not offered as space arrangement or the time sequencing etc. of these elements, these elements should not be limited by these terms.Term " and/
Or " include the associated term listed one kind or any one of multiple and all combinations.Term "comprising", " comprising ",
" having " etc. refers to the presence of stated feature, element, element or component, but presence or addition one or more is not precluded
Other features, element, element or component.
In embodiments of the present invention, singular " one ", "the" etc. include plural form, should be broadly interpreted as "an"
Or " one kind " and be not defined as "one" meaning；Furthermore term " described " be interpreted as both include singular and also including
Plural form, unless the context clearly indicates otherwise.Furthermore term " according to " is interpreted as " based in part on ... ", term
" being based on " is interpreted as " being at least partially based on ... ", unless the context clearly indicates otherwise.
The various embodiments of the embodiment of the present invention are illustrated with reference to the accompanying drawing.These embodiments are example
Property, it is not the limitation to the embodiment of the present invention.
Embodiment 1
A kind of field weakening control method is present embodiments provided, Fig. 2 is the schematic diagram of this method, as shown in Fig. 2, this method packet
It includes:
Step 201: maximum output torque range pair is calculated according to the maximum output voltage that the driver of motor is capable of providing
The exciting current range answered；
Step 202: the exciting current after adjusting being limited according to the exciting current range, so that the excitation of output
Electric current is located within the scope of the exciting current.
The method of the present embodiment improves motor operation in rated frequency by limiting the exciting current after adjusting
Maximum output torque when above.
In the present embodiment, exciting current range has a minimum value (id_min) and a maximum value (id_max).This is encouraged
Maximum value (the i of magnetic current ranged_max) it is preset by user.For example, user can be pre- according to the rated frequency of motor
The maximum value of exciting current range is first set, alternatively, user can also rule of thumb determine the maximum value of the exciting current range,
The present embodiment to this with no restriction.Minimum value (the i of the exciting current ranged_min) it is to be capable of providing most by the driver of motor
What big output voltage determined.
Fig. 3 shows the relationship between exciting current range and maximum output torque range, as shown in figure 3, in motor
In the case that revolving speed is certain, the minimum value (i of exciting current ranged_min) correspond to maximum output torque range maximum value, encourage
Maximum value (the i of magnetic current ranged_max) correspond to maximum output torque range minimum value.
In one embodiment, the minimum value (i of the exciting current ranged_min) and the maximum output voltage (Us_max)
It is directly proportional, and be inversely proportional with the revolving speed of the parameter of electric machine of motor and motor, minimum value of the present embodiment to exciting current range
Calculation with no restriction.Here, the parameter of electric machine is, for example, stator inductance (Ls), motor pole logarithm (Pn), motor actual corners
Speed (ωr), motor actual angular speed instruct (ωr_cmd) etc., but the present embodiment is without limitation.
In the present embodiment, the maximum output can be calculated according to the parameter of the motor and the revolving speed of the motor
Minimum exciting current required for the torque capacity that voltage can export.
For example, the minimum exciting current can be with maximum output voltage (Us_max) it is directly proportional, while with output voltage
Angular speed (ωs) and stator inductance (Ls) be inversely proportional.
For another example the minimum exciting current can be with maximum output voltage (Us_max) directly proportional while practical with motor
Angular speed (ωr), motor pole logarithm (Pn) and stator inductance (Ls) be inversely proportional.
For another example the minimum exciting current can be with maximum output voltage (Us_max) directly proportional while practical with motor
Angular speed instructs (ωr_cmd), motor pole logarithm (Pn) and stator inductance (Ls) be inversely proportional.
It is above-mentioned to be merely illustrative, the present embodiment to the calculation of the minimum exciting current with no restriction.Pass through calculating
Minimum exciting current required for the torque capacity that maximum output voltage can export under different rotating speeds, available correspondence is not
With the different exciting current ranges of revolving speed.
In the present embodiment, exciting current range has been obtained, the exciting current after adjusting can have been limited, be allowed to position
In within the scope of the exciting current, as a result, by limiting the exciting current after adjusting, motor operation is improved in specified frequency
Maximum output torque when more than rate.
It in one embodiment, can be with if the exciting current after adjusting is located within the scope of above-mentioned exciting current
Exciting current of the exciting current as above-mentioned output.
In one embodiment, if the exciting current after adjusting is less than the minimum value of above-mentioned exciting current range,
It can be using the minimum value of the exciting current range as the exciting current of above-mentioned output.
In one embodiment, if the exciting current after adjusting is greater than the maximum value of above-mentioned exciting current range,
It can be using the maximum value of the exciting current range as the exciting current of above-mentioned output.
Fig. 4 is excitation control method the showing compared with the speed-torque characteristic of existing excitation control method of the present embodiment
It is intended to.In the example of fig. 4, the maximum output voltage U being capable of providing with the driver of motors_maxFor 200v, motor it is specified
Power is 400W, rated speed 1470rpm, for speed command is 1500rpm.From fig. 4, it can be seen that compared to existing skill
The excitation control method of art, the present embodiment improves the maximum output torque of rated frequency or more.
Embodiment 2
A kind of weak magnetic controller is present embodiments provided, the principle and embodiment 1 solved the problems, such as due to the weak magnetic controller
Identical, content same as Example 1 is not repeated to illustrate.
Fig. 5 is the schematic diagram of the weak magnetic controller 500 of the present embodiment, as shown in figure 5, the weak magnetic controller 500 includes:
Exciting current range calculator 501, the maximum output voltage U being capable of providing according to the driver of motors_maxMeter
Calculate the corresponding exciting current range i of maximum output torque ranged_range；And
Excitation current instruction limiter 502, according to the exciting current range id_rangeTo the exciting current after adjusting
id_cmd' limited, so that the exciting current i of outputd_cmd_weakPositioned at the exciting current range id_rangeIt is interior.
In an embodiment of the present embodiment, exciting current range calculator 501 according to the parameter of the motor and
The revolving speed of the motor calculates minimum exciting current i required for the torque capacity that the maximum output voltage can exportd_min,
And the maximum value i for determining the exciting current range is set according to userd_max.In the present embodiment, it is encouraged about above-mentioned minimum
The calculation of magnetoelectricity stream is described in embodiment 1, and details are not described herein again, and the present embodiment is also not necessarily limited to implement
Calculation documented by example 1.
In the another embodiment of the present embodiment, excitation of the excitation current instruction limiter 502 after the adjusting
Electric current id_cmd' it is located at the exciting current range id_rangeWhen interior, with the exciting current id_cmd' excitation as the output
Electric current id_cmd_weak；Exciting current i after the adjustingd_cmd' it is less than the exciting current range id_rangeMinimum value
id_minWhen, by the exciting current range id_rangeMinimum value id_minExciting current i as the outputd_cmd_weak；?
Exciting current after the adjusting is greater than the exciting current range id_rangeMaximum value id_maxWhen, by the exciting current model
Enclose id_rangeMaximum value id_maxExciting current i as the outputd_cmd_weak。
In the present embodiment, as shown in figure 5, the weak magnetic controller 500 can also include:
First calculator 503 calculates the maximum output voltage U that the driver of the motor is capable of providings_maxWith motor
Output voltage Us_cmdDifference；
The difference is adjusted in proportional and integral controller 504, the exciting current adjustment amount Δ i after being adjustedd；
And
Second calculator 505, by the exciting current i of motord_cmdWith the exciting current adjustment amount Δ idIt is added, obtains
Exciting current i after adjustingd_cmd’。
About above-mentioned first calculator 503, proportional and integral controller 504, the second calculator 505 specific embodiment can
To refer to the prior art, also, above three device is substituted, other devices can be used also to calculate the exciting current after adjusting
id_cmd', the prior art can be specifically referred to, details are not described herein again.
The weak magnetic controller of the present embodiment improves motor operation in volume by limiting the exciting current after adjusting
Determine maximum output torque when frequency or more.
Embodiment 3
A kind of current-order generator is present embodiments provided, which includes as described in example 2 weak
Magnetic controller.
Fig. 6 shows an example of the current-order generator, as shown in fig. 6, the current-order generator 600 wraps
It includes: weak magnetic controller 601 and torque current controller 602.
In the present embodiment, weak magnetic controller 601 can be realized by weak magnetic controller 500 shown in fig. 5, due to
In embodiment 2, the weak magnetic controller 500 is elaborated, content is incorporated in this, and details are not described herein again.
In the present embodiment, torque current controller 602 is used for according to torque instruction Te_cmdAnd weak magnetic controller 601 is defeated
Weak magnetoelectricity stream i outd_cmd_weakGenerate torque current iq_cmd, specific embodiment can be with reference to the prior art, the present embodiment
It is without limitation.
The current-order generator of the present embodiment is due to encouraging after using 600 pairs of weak magnetic controller adjustings of embodiment 2
Magnetoelectricity stream is limited, maximum output torque when improving motor operation more than rated frequency.
Embodiment 4
A kind of electric machine control system is present embodiments provided, which includes that electric current described in embodiment 3 refers to
Enable generator.
Fig. 7 shows an example of the electric machine control system, as shown in fig. 7, the electric machine control system 700 includes: speed
Degree automatic adjustment device (ASR) 701, current-order generator (CCG) 702, electric current automatically adjust device (ACR) 703, space vector arteries and veins
Wide adjustment module (SVPWM) 704 and insulated gate bipolar transistor (IGBT) 705.
In the present embodiment, the speed command (Speed which provides usercmd) be converted into exporting
Voltage (Ua, Ub, Uc) controls induction machine (IM), and this control method has responsiveness fast, feature with high accuracy.
As shown in fig. 7, speed command (the Speed that user providescmd) become to turn by speed automatic adjustment device (ASR) 701
Square instructs (Te_cmd), current-order generator (CCG) 702 is by torque instruction (Te_cmd) resolve into excitation current instruction (id_cmd)
(i is instructed with torque currentq_cmd), then current regulator (ACR) 703 converts them to corresponding voltage instruction (U againα,
Uβ), the pulse of control insulated gate bipolar transistor (IGBT) is calculated by space vector pulse width adjustment module (SVPWM) 704
Width modulated (PWM) duty ratio (PWMduty), control induction machine is exported finally by insulated gate bipolar transistor (IGBT)
(IM) voltage (Ua, Ub, Uc).
In the present embodiment, current-order generator (CCG) 702 can pass through current-order generator 600 shown in fig. 6
It realizes, due in embodiment 3, being elaborated to the current-order generator 600, content is incorporated in
This, details are not described herein again.
In the present embodiment, speed automatic adjustment device (ASR) 701, electric current automatically adjust device (ACR) 703, space vector arteries and veins
The specific implementation of wide adjustment module (SVPWM) 704 and insulated gate bipolar transistor (IGBT) 705 can refer to existing
Technology, details are not described herein again.
Excitation after 500 pairs of weak magnetic controller adjustings of the electric machine control system of the present embodiment due to using embodiment 2
Electric current is limited, maximum output torque when improving motor operation more than rated frequency power.
The embodiment of the present invention also provides a kind of computer-readable program, wherein when executing described program in weak magnetic controller
When, described program makes the weak magnetic controller execute method described in embodiment 1.
The embodiment of the present invention also provides a kind of storage medium for being stored with computer-readable program, wherein the computer can
Reader makes weak magnetic controller execute method described in embodiment 1.
The device and method more than embodiment of the present invention can be by hardware realization, can also be by combination of hardware software realization.
The present embodiments relate to such computer-readable programs can make the logic when the program is performed by logical block
Component realizes devices described above or component parts, or the logical block is made to realize various method or steps described above.
The embodiment of the present invention further relates to the storage medium for storing procedure above, such as hard disk, disk, CD, DVD, flash memory
Deng.
The software mould that hardware can be embodied directly in conjunction with the method, device that the embodiment of the present invention describes, executed by processor
Block or both combination.For example, the one or more of one or more of functional block diagram and/or functional block diagram shown in Fig. 5
Combination, both can correspond to each software module of computer program process, and can also correspond to each hardware module.These are soft
Part module can correspond respectively to each step shown in Fig. 2.These hardware modules are for example using field programmable gate array
(FPGA) these software modules are solidified and is realized.
Software module can be located at RAM memory, flash memory, ROM memory, eprom memory, eeprom memory, post
Storage, hard disk, mobile disk, CD-ROM or any other form known in the art storage medium.One kind can be deposited
Storage media is coupled to processor, to enable a processor to from the read information, and can be written to the storage medium
Information；Or the storage medium can be the component part of processor.Pocessor and storage media can be located in ASIC.This is soft
Part module can store in the memory of equipment, also can store in the storage card that can be inserted into equipment.For example, if equipment is adopted
It is the MEGA-SIM card of larger capacity or the flash memory device of large capacity, then the software module is storable in the MEGA-SIM
In the flash memory device of card or large capacity.
It is combined for one or more of function box described in attached drawing and/or the one or more of function box,
It can be implemented as general processor for executing function described by the embodiment of the present invention, digital signal processor (DSP), dedicated
Integrated circuit (ASIC), field programmable gate array (FPGA) either other programmable logic device, discrete gate or transistor
Logical device, discrete hardware components or it is any appropriately combined.For one or more of the function box of attached drawing description
And/or one or more combinations of function box, it is also implemented as calculating the combination of equipment, for example, DSP and microprocessor
Combination, multi-microprocessor communicate the one or more microprocessors or any other this configuration combined with DSP.
Combining specific embodiment above, invention has been described, it will be appreciated by those skilled in the art that this
A little descriptions are all exemplary, and are not limiting the scope of the invention.Those skilled in the art can be according to the present invention
Spirit and principle various variants and modifications are made to the present invention, these variants and modifications are also within the scope of the invention.
Claims (10)
1. a kind of field weakening control method, which is characterized in that the described method includes:
The corresponding exciting current of maximum output torque range is calculated according to the maximum output voltage that the driver of motor is capable of providing
Range；
The exciting current after adjusting is limited according to the exciting current range, so that the exciting current of output is positioned at described
Within the scope of exciting current.
2. the method according to claim 1, wherein the maximum value of the exciting current range is preparatory by user
Setting, the minimum value of the exciting current range is directly proportional to the maximum output voltage and joins with the motor of the motor
Several and the motor revolving speed is inversely proportional.
3. according to the method described in claim 2, it is characterized in that, the minimum value of the exciting current range in the following manner
It calculates and obtains:
The torque capacity that the maximum output voltage can export is calculated according to the revolving speed of the parameter of the motor and the motor
Required minimum exciting current.
4. the method according to claim 1, wherein according to the exciting current range to the excitation electricity after adjusting
Stream is limited, comprising:
If the exciting current after the adjusting is located within the scope of the exciting current, using the exciting current as described defeated
Exciting current out；
If the exciting current after the adjusting is less than the minimum value of the exciting current range, by the exciting current range
Exciting current of the minimum value as the output；
If the exciting current after the adjusting is greater than the maximum value of the exciting current range, by the exciting current range
Exciting current of the maximum value as the output.
5. a kind of weak magnetic controller, which is characterized in that the weak magnetic controller includes:
Exciting current range calculator calculates maximum output according to the maximum output voltage that the driver of motor is capable of providing and turns
The corresponding exciting current range of square range；
Excitation current instruction limiter limits the exciting current after adjusting according to the exciting current range, so that
The exciting current of output is located within the scope of the exciting current.
6. weak magnetic controller according to claim 5, which is characterized in that the exciting current range calculator is according to
The revolving speed of the parameter of motor and the motor calculates minimum required for the torque capacity that the maximum output voltage can export
Exciting current.
7. weak magnetic controller according to claim 5, which is characterized in that the excitation current instruction limiter is in the tune
When exciting current after section is located within the scope of the exciting current, using the exciting current as the exciting current of the output；
When exciting current after the adjusting is less than the minimum value of the exciting current range, by the minimum of the exciting current range
It is worth the exciting current as the output；Exciting current after the adjusting is greater than the maximum value of the exciting current range
When, using the maximum value of the exciting current range as the exciting current of the output.
8. weak magnetic controller according to claim 5, which is characterized in that the weak magnetic controller further include:
First calculator calculates the output voltage of maximum output voltage and motor that the driver of the motor is capable of providing
Difference；
The difference is adjusted in proportional and integral controller, the exciting current adjustment amount after being adjusted；And
The exciting current of motor is added by the second calculator with the exciting current adjustment amount, the excitation electricity after being adjusted
Stream.
9. a kind of current-order generator, which is characterized in that the current-order generator includes any one of claim 5-8 institute
The weak magnetic controller stated.
10. a kind of electric machine control system, which is characterized in that the electric machine control system includes that electric current as claimed in claim 9 refers to
Enable generator.
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