CN101769953A - Phase current detection method of motor based on direct-current bus current - Google Patents
Phase current detection method of motor based on direct-current bus current Download PDFInfo
- Publication number
- CN101769953A CN101769953A CN201010039771A CN201010039771A CN101769953A CN 101769953 A CN101769953 A CN 101769953A CN 201010039771 A CN201010039771 A CN 201010039771A CN 201010039771 A CN201010039771 A CN 201010039771A CN 101769953 A CN101769953 A CN 101769953A
- Authority
- CN
- China
- Prior art keywords
- cycle
- pwm carrier
- action time
- space vector
- phase current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The invention provides a phase current detection method of a motor based on direct-current bus current, which is easy to realize an algorithm, has relatively better control effect and also can effectively reconstruct the phase current of the motor in a non-observable area when the motor is driven by a space vector modulation mode. In the method, when the acting time of a minimum vector can not be met because of too short acting time of a non-zero basic space vector existing in PWM carrier cycles, the acting time of the non-zero basic space vector in one PWM carrier cycle is increased to meet the acting time of the minimum vector under the condition that the total acting time of the non-zero basic space vector in a plurality of PWM carrier cycles in the same control algorithm period keeps invariable so as to realize the reconstruction of the phase current of the motor. In the invention, the non-observable area is changed into an observable area by modulating through a symmetrical PWM mode, the total acting time of the basic vector with too small acting time in the same control algorithm period keeps invariable, and the distortion of a voltage vector function is also avoided.
Description
Technical field
The present invention relates to motor phase current detection technique field, specifically, relate to a kind of motor phase current detection method based on dc bus current.
Background technology
In the AC motor control system, it is a key link that the phase current of motor detects, classic methods is to adopt current sensor to detect the phase current of motor, promptly at ac output end 3 or at least 2 current sensors is set, so that the feedback signal of phase current to be provided.Current sensor commonly used is a Hall effect detectors, and it not only costs an arm and a leg, and bulky, is difficult to be integrated in the power electronic equipment.Therefore, precision do not need too high and the situation that need reduce cost under, proposed to sample and detected the method for motor phase current by dc bus current.
Sample by dc bus current and to detect motor phase current, be i.e. single current sample (Oneshunt current detection) technology of often saying.The structure principle chart of inverter circuit as shown in Figure 1, sampling resistor Z is serially connected with between the N end and dc bus capacitor negative terminal of brachium pontis under the switching tube (IGBT), then according to dc bus current, switching tube on off state and three-phase current three's relation, utilize dc bus current and switching tube on off state reconstruct three-phase current, it is a kind of method for reconstructing phase current that adopts single resistance sampling mode, therefore, be called single resistor current sampling again.
For single current sample technology, make effectively reconstruct phase current of dc bus current sampled value, its sampling time must be greater than a minimum time T
MinAnd motor adopts space vector modulation (SVPWM) when mode drives, SVPWM is modulated at that sector borders is switched or during low speed control, and the action time that all can appear at some in the PWM carrier cycle (or both) non-zero fundamental space vector is too short and do not satisfy minimum time T
Min(be non-zero fundamental space vector action time 1/2 less than minimum time T
MinDo not satisfy condition, hereinafter again this be described in detail), the action time of arbitrary non-zero fundamental space vector is too short and do not satisfy minimum time T in the PWM carrier cycle
MinThe time, can't finish the sampling of dc bus current, also just effective reconstruct motor phase current.
Thus, usually again with this minimum time T
MinBe called minimum vector action time, minimum vector action time is owing to existing difference to cause between practical devices characteristic and the ideal in the system, for the system that determines, minimum vector determines that it is the AD sampling and retention time sum of PWM Dead Time, Hardware Response Delay time and MCU action time.
When SVPWM is modulated, arbitrary non-zero fundamental space vector action time too short in the PWM carrier cycle and do not satisfy minimum vector action time, causing effectively, the zone of reconstruct motor phase current is called the non-observation area; Otherwise effectively the zone of reconstruct motor phase current is called the may observe zone.For the non-observation area two kinds of disposal routes are arranged usually, a kind of is to reduce the non-observation area: as reduce dc bus current, increase the PWM carrier cycle, improve modulating vector, reduce minimum vector action time etc.; Another kind is to avoid the non-observation area: as guaranteeing the non-zero fundamental space vector least action time etc., the latter's effect is better than the former usually.
At present, avoiding the more general method in non-observation area is to adopt the asymmetrical PWM method.The asymmetrical PWM method is meant in the non-observation area and adopts the asymmetrical PWM modulation, by resolution of vectors and compensation, increase action time less than the non-zero fundamental space vector of minimum vector action time to the least action time, to realize the electric current efficiently sampling.
Though the method can effectively realize the electric current reconstructing of non-observation area, can better solve the application of single current sample technology on motor.But exist not enough: such as the MCU performance is had higher requirements, promptly need support asymmetrical PWM, most MCU does not have this function as yet at present yet, need additionally add ASIC or CPLD handles, and can increase cost; Once more, adopt the asymmetrical PWM modulation, the electric current and voltage harmonic wave can increase relatively, and device loss also increases, influence control effect; Simultaneously, because the existence of PWM dead band, hardware circuit response time, voltage harmonic strengthens during low speed, and the control effect can be worse and worse.
Summary of the invention
The objective of the invention is to solve the defective that prior art exists, it is better relatively to provide a kind of algorithm to realize, control effect easily, when space vector modulation mode driving motor, the non-observation area is the effective motor phase current detection method based on dc bus current of reconstruct motor phase current also.
Technical matters solved by the invention can realize by the following technical solutions:
A kind of motor phase current detection method based on dc bus current, motor adopts the space vector modulation mode to drive, be serially connected with sampling resistor between the N of brachium pontis end and the dc bus capacitor negative terminal under the inverter circuit switching tube, it is characterized in that: the control algolithm cycle of motor is the integral multiple of PWM carrier cycle, when space vector modulation enters the non-observation area, exist non-zero fundamental space vector action time too short and do not satisfy minimum vector during action time in the PWM carrier cycle, keep in the same control algolithm cycle under the constant situation of resultant action time of this non-zero fundamental space vector in a plurality of PWM carrier cycles, satisfy minimum vector action time with increasing to action time of this non-zero fundamental space vector in one of them PWM carrier cycle, adopt the motor phase current of single current sample mode reconstruct said PWM carrier cycle again, and with the motor phase current of said PWM cycle motor phase current as this control algolithm each PWM carrier cycle in the cycle.
Among the present invention, after making the reconstruct motor phase current, can participate in control at once, reduce time-delay, one of them increases to non-zero fundamental space vector action time and satisfies the minimum vector PWM carrier cycle of action time in the described same control algolithm cycle, is same control algolithm last in a plurality of PWM carrier cycles in the cycle.
One of them increases to non-zero fundamental space vector action time and satisfies the minimum vector PWM carrier cycle of action time in the described same control algolithm cycle, and the mode that adopts PWM carrier wave rear end to sample is constantly carried out this PWM carrier cycle reconstructing phase current of electromotor.
Among the present invention, in order to reduce voltage harmonic to greatest extent, removing in the same control algolithm cycle one of them increases to non-zero fundamental space vector action time and satisfies the minimum vector PWM carrier cycle of action time, in other PWM carrier cycles in the same control algolithm cycle, the non-zero fundamental space vector that does not satisfy minimum vector action time action time is identical the action time in each PWM carrier cycle.
Among the present invention, the described control algolithm cycle is 4 to 10 times of PWM carrier cycle, and promptly the control algolithm frequency is 1/4～1/10 of a carrier frequency, and the control algolithm frequency is excessive can't effectively to be compensated to avoid, too small and influence control effect.
The present invention adopts the symmetrical PWM mode modulation, too small basic vector increased to action time satisfy minimum vector action time, change the non-observation area into the may observe zone, can be effectively in the mode by single current sample at non-observation area reconstruct motor phase current; By reducing the action time of other PWM carrier cycle basic vectors, make the resultant action time-preserving of the basic vector that action time in the same control algolithm cycle is too small, it is true to avoid the voltage vector effect to vow.
Description of drawings
Fig. 1 is the structure principle chart of existing single current sample inverter circuit.
Fig. 2 is the space vector modulation synoptic diagram.
Fig. 3 is in sector one direct current bus current front-end sampling synoptic diagram for space vector modulation.
Motor phase current flowed to synoptic diagram when Fig. 4 was switching tube state (100).
Motor phase current flowed to synoptic diagram when Fig. 5 was switching tube state (110).
Fig. 6 is in sector one direct current bus current front-end sampling and rear end sampling synoptic diagram for space vector modulation.
The synoptic diagram of non-observation area when Fig. 7 is space vector modulation.
Fig. 8 is in sector one near the fundamental space vector V for space vector modulation
1The non-observation area, the PWM carrier wave synoptic diagram of handling without the inventive method in control algolithm cycle.
Fig. 9 is in sector one near the fundamental space vector V for space vector modulation
1The non-observation area, the PWM carrier wave synoptic diagram of handling through the inventive method in control algolithm cycle.
Figure 10 motor that to be an instantiation gather by the AC current sensor is a phase current synoptic diagram wherein.
The motor that Figure 11 is the example identical with Figure 10 by reconstruct of the present invention is the current diagram of a phase wherein.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Sampling by dc bus current, to detect motor phase current (single current sample) be a kind of mature technology, and its fundamental purpose is in order to overcome cost height, bulky problem when using the current sensor senses motor phase current.Precision do not need too high and the situation that need reduce cost under, be widely used.
Before the instruction book current sample detects motor phase current, at first simply introduce space vector modulation (SVPWM).As shown in Figure 2, space vector modulation is that the modulation space vector is divided into 6 sectors and 6 fundamental space vectors, and two zero vectors, and like this, the modulation space vector of any direction, size can obtain by two adjacent fundamental space vectors are synthetic.
The all corresponding a kind of on off state of each fundamental space vector, applying of fundamental space vector is that conducting state by changing 6 switching tubes (IGBT) realizes, control the action time of fundamental space vector by the duration of gauge tap pipe conducting state, length by adjacent two fundamental space vector action times, the modulation space vector that can synthesize any direction, size is to realize the driving to motor.
The switching tube state of every phase brachium pontis is defined as S respectively
u, S
v, S
wBe defined as state " 1 " during last brachium pontis device for power switching conducting, (last brachium pontis device for power switching conducting brachium pontis device for power switching at present is in off state to be defined as state " 0 " during shutoff, last brachium pontis device for power switching turn-offs at present, and the brachium pontis device for power switching promptly is in conducting state), according to three groups of brachium pontis (S
u, S
v, S
w) break-make, six groups of non-zero fundamental space vectors are as giving a definition: the fundamental space vector V
1Corresponding switching tube state (100), the fundamental space vector V
2Corresponding switching tube state (110), fundamental space vector V
3Corresponding switching tube state (010), fundamental space vector V
4Corresponding switching tube state (011), fundamental space vector V
5Corresponding switching tube state (001), fundamental space vector V
6Corresponding switching tube state (101), two groups of these space vectors of zero-base are done as giving a definition: the fundamental space vector V
0Corresponding switching tube state (000), fundamental space vector V
7Corresponding switching tube state (111).
Close tubulose attitude (100) expression u and go up the brachium pontis conducting mutually, v goes up brachium pontis mutually with w mutually and turn-offs, close tubulose attitude (110) expression u and go up the brachium pontis conducting mutually with v mutually, w goes up brachium pontis mutually and turn-offs, close tubulose attitude (010) expression v and go up the brachium pontis conducting mutually, u goes up brachium pontis mutually with w mutually and turn-offs, close tubulose attitude (011) expression v and go up the brachium pontis conducting mutually with w mutually, u goes up brachium pontis mutually and turn-offs, close tubulose attitude (001) expression w and go up the brachium pontis conducting mutually, u goes up brachium pontis mutually with v mutually and turn-offs, and closes tubulose attitude (101) expression u and goes up the brachium pontis conducting mutually with w mutually, and v goes up brachium pontis mutually and turn-offs, brachium pontis turn-offed simultaneously on pass tubulose attitude (000) was represented three groups, do not have electric current to flow in the motor, brachium pontis conducting simultaneously on pass tubulose attitude (111) is represented three groups does not have electric current to flow out in the motor.
The switch controlled voltage that different time period is corresponding different, different control voltage causes the different on off operating mode of power switch pipe in the inverter circuit, different on off operating modes then corresponding different motor phase currents flow to.Therefore, in the time of can utilizing space vector modulation, twice different conditions of switching tube dc bus current sampled value is constantly come the reconstruct three-phase current in the same PWM carrier cycle.
Being in sector one with space vector modulation is example, sets forth and how to carry out dc bus current sampling and reconstruct motor phase current.At this moment, being in the modulation space vector of sector one all can be by the fundamental space vector V
1With the fundamental space vector V
2Synthesize again and obtain after the effect respectively, so the state of switching tube has experienced (100) and (110) in same PWM carrier cycle.
Referring to Fig. 3, a state of switching tube constantly is (100), i.e. the fundamental space vector V
1Action time, the flow direction of motor phase current is (electric current flows out the motor side direction for negative to flow to the motor side direction for just) as shown in Figure 4, a constantly carries out current sample to dc bus, then a current sampling data I constantly
1=I
Dc=I
uThe b state of switching tube constantly is (110), i.e. the fundamental space vector V
2Action time, the flow direction of motor phase current is (electric current flows out the motor side direction for negative to flow to the motor side direction for just) as shown in Figure 5, b constantly carries out current sample to dc bus, then b current sampling data I constantly
2=I
Dc=I
u+ I
v=-I
wBecause the sampling time is very short, phase current can not undergone mutation, and can be zero (I according to the phase current sum like this
u+ I
v+ I
w=0), obtaining the three-phase electricity flow valuve is: I
u=I
1, I
v=-(I
u+ I
w(the I of)=-
1-I
2)=I
2-I
1, I
w=-I
2, finished the reconstruct of motor phase current by the dc bus current sampling with this.When space vector modulation was in other sectors, the reconstruct mode of sampling of electric dc bus current and motor phase current was similar, and those skilled in the art understands wherein principle, had derived one by one with regard to the situation to other sectors not at this.The corresponding relation of sample rate current, switching tube state and motor phase current is as shown in the table:
Because there be twice variation in the switching tube state in the same PWM carrier cycle, being in sector one with Vector Modulation is example, is changed to (110) in PWM carrier wave Head switches tubulose attitude by (100), is changed to (100) in PWM carrier wave Foot switches tubulose attitude by (110).Therefore, the front end that the sampling of dc bus current can be chosen in the PWM carrier wave carries out constantly, and carry out constantly the rear end that also can be chosen in the PWM carrier wave.Among Fig. 3, the sampling of dc bus current is that the front end at the PWM carrier wave carries out constantly, the sampling of dc bus current is to carry out as shown in Figure 6 constantly in the rear end of PWM carrier wave, its principle is identical with front end at the PWM carrier wave constantly, the method of dc bus current sampling back reconstruct motor three-phase current also is identical, just has been not repeated at this.
Point out in the background technology that will make effectively reconstruct phase current of dc bus current sampled value, when space vector modulation, the action time of fundamental space vector can not be too short, must satisfy minimum vector (minimum time T action time
Min), otherwise the dc bus current sampling time is too short, the resistance that is connected in series between the N of brachium pontis end and the dc bus capacitor negative terminal under the inverter circuit switching tube just can't be finished the sampling of dc bus current.Promptly to satisfy the sampling that sampling resistor is finished dc bus current, the fundamental space vector in a PWM carrier cycle action time 1/2 must be greater than minimum vector action time.This is because dc bus current sampling or be that front end at the PWM carrier wave carries out constantly, be to carry out constantly in the rear end of PWM carrier wave, the sampling time of dc bus current has only the fundamental space vector in a PWM carrier cycle 1/2 of action time, the sampling time that therefore will make dc bus current, the condition that need satisfy the action time of fundamental space vector was greater than minimum vector action time: action time that makes the fundamental space vector in a PWM carrier cycle 1/2 greater than minimum vector action time.
Referring to Fig. 7, motor adopts space vector modulation (SVPWM) when mode drives, when SVPWM is modulated at sector borders (figure bend part) and switches, for example in the sector one near the fundamental space vector V
1Zone when switching, the fundamental space vector V
2Action time in a PWM carrier cycle is with too short, so that the fundamental space vector V
2Can't satisfy minimum vector action time the action time in a PWM carrier cycle (is the fundamental space vector V
2Action time in a PWM carrier cycle 1/2 less than minimum vector action time), so just can not finish the sampling of dc bus current.In like manner, in the sector one near the fundamental space vector V
2Zone when switching, the fundamental space vector V
1Action time in a PWM carrier cycle is with too short and can't satisfy the sampling of dc bus current.The borderline region of sector for other always has a fundamental space vector can't meet the demands the action time in a PWM carrier cycle, because ultimate principle is identical, has not just analyzed one by one at this.
Except when sector borders is switched, can't satisfy the action time of a fundamental space vector outside the dc bus current sampling, when motor low speed is controlled, the sampling that all can't satisfy dc bus current action time of two adjacent fundamental space vectors in some zone even same sector.In a word, the above-mentioned zone that can't finish dc bus current sample reconstruction motor phase current is referred to as the non-observation area, the non-observation area will seriously hinder the realization of single current sample.
Purport of the present invention promptly avoids the non-observation area to occur, and a kind of new motor phase current detection method based on dc bus current is provided.For space vector modulation, the control algolithm cycle is a PWM carrier cycle integral multiple, and promptly a control algolithm has a plurality of PWM carrier cycles in the cycle, has 5 PWM carrier cycles in the cycle with a control algolithm in the present embodiment and describes.
Referring to Fig. 8, a control algolithm period T
sIn have 5 PWM carrier cycles, this moment space vector modulation be in sector one near the fundamental space vector V
1The non-observation area, if do not carry out any processing, fundamental space vector V
2(corresponding switching tube state (110)) will be very short action time in a PWM carrier cycle, can't satisfy minimum vector action time certainly, in the drawings AD
1Locate just can't satisfy dc bus current is sampled.
Referring to Fig. 9, the present invention is with a control algolithm one of them PWM carrier cycle fundamental space vector V in the cycle
2Action time increase to and satisfy minimum vector action time, be i.e. this PWM carrier cycle fundamental space vector V
2 Action time 1/2 greater than minimum vector action time, in fact consider critical conditions, the fundamental space vector V
2Equal the sampling that minimum vector can satisfy dc bus current action time 1/2 of action time, fundamental space vector V when generally handling
2Equaling minimum vector 1/2 of action time gets final product action time.AD like this, in the drawings
1The place just can finish the sampling to dc bus current, can utilize the mode of single current sample to carry out the reconstruct of motor three-phase current to this PWM carrier cycle.
But, with a control algolithm one of them PWM carrier cycle fundamental space vector V in the cycle
2Action time increase after, will inevitably cause fundamental space vector V in the control algolithm cycle
2The resultant action time increase, can lead the voltage vector effect like this and increase and make the sampled result distortion, therefore need the fundamental space vector V
2Compensate.The mode of compensation is with control algolithm fundamental space vector V in other 4 PWM carrier cycles in the cycle
2Action time reduce, guarantee in a control algolithm 5 PWM carrier cycle fundamental space vector V in the cycle
2The resultant action time-preserving.After compensating, the motor three-phase current of aforementioned PWM carrier cycle reconstruct promptly can be used as the three-phase current of the motor of all PWM carrier cycles in the control algolithm cycle.
To a control algolithm other 4 PWM carrier cycle fundamental space vector V in the cycle
2Action time preferably uniform when reducing, promptly make to reduce other 4 PWM carrier cycle fundamental space vector V in the back control algolithm cycle
2Action time identical, reducing voltage harmonic to greatest extent, and this Processing Algorithm is the simplest.
For the fundamental space vector V
2The PWM carrier cycle that increases action time, preferably as shown in Figure 9, be same control algolithm last in 5 PWM carrier cycles in the cycle, promptly more near next control algolithm cycle, and when carrying out single current sample, the mode that also adopts PWM carrier wave rear end to sample is constantly carried out this PWM carrier cycle reconstructing phase current of electromotor, makes like this can participate in behind the reconstruct motor phase current controlling, and reduces to delay time at once.
Simultaneously, for the control algolithm frequency is excessive can't effectively to be compensated to avoid, the too small and influence control effect of frequency, the control algolithm frequency is preferably 1/4～1/10 of PWM carrier frequency, and promptly the control algolithm cycle is preferably 4 to 10 times of PWM carrier cycle.In the present embodiment, only being to be that 5 times of PWM carrier cycle carry out exemplary illustration with the control algolithm cycle, is not limitation of the present invention, and when the control algolithm cycle was other integral multiples of PWM carrier cycle, method of the present invention was same being suitable for.
During for space vector modulation, the non-observation area of other sector borders only needs according to circumstances the fundamental space vector that does not satisfy condition to be handled to get final product, because the basic skills of handling is similar, just tires out at this and has stated.When controlling for motor low speed, two non-observation areas that adjacent fundamental space vector does not satisfy condition only need all be carried out above-mentioned processing to two fundamental space vectors and be got final product.
Referring to Figure 10 and Figure 11, to following instantiation: motor: compressor DH130X1C-20FZ3; Power base: SH7124 compressor debug platform; Control panel (C/B): SH7124 compressor debug platform; IPM:PS21965; MCU:SH7124 (40MHz); PWM Dead Time: 2.0us; DC bus-bar voltage: 310V; PWM carrier frequency: 10K (cycle 100us), control algolithm frequency: 2K (control algolithm cycle 500us).Coincide with comparing substantially by the motor phase current of method reconstruct of the present invention, illustrate that effect of the present invention is extraordinary by the motor phase current of AC current sensor collection.
Certainly, compole is short during the resultant action of the fundamental space vector of handling at needs at a plurality of PWM carrier cycles in same control algolithm cycle, even the sum of a plurality of PWM carrier cycles in same control algolithm cycle 1/2 all less than minimum vector during action time, with increase to action time of one of them this fundamental space vector of PWM carrier cycle in same control algolithm cycle satisfy the dc bus current sampling after, needing the action time of other these fundamental space vectors of PWM carrier cycle in the same control algolithm cycle is negative, the resultant action time that could satisfy a plurality of these fundamental space vectors of PWM carrier cycle in the same control algolithm cycle keeps inconvenience, and this obviously can't realize.At this moment, if also want to utilize ultimate principle of the present invention that reconstructing phase current of electromotor is carried out in the non-observation area, need other PWM carrier cycles in action time of this fundamental space vector be set to zero and handle.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. based on the motor phase current detection method of dc bus current, motor adopts the space vector modulation mode to drive, be serially connected with sampling resistor between the N of brachium pontis end and the dc bus capacitor negative terminal under the inverter circuit switching tube, it is characterized in that: the control algolithm cycle of motor is the integral multiple of PWM carrier cycle, when space vector modulation enters the non-observation area, exist non-zero fundamental space vector action time too short and do not satisfy minimum vector during action time in the PWM carrier cycle, keep in the same control algolithm cycle under the constant situation of resultant action time of this non-zero fundamental space vector in a plurality of PWM carrier cycles, satisfy minimum vector action time with increasing to action time of this non-zero fundamental space vector in one of them PWM carrier cycle, adopt the motor phase current of single current sample mode reconstruct said PWM carrier cycle again, and with the motor phase current of said PWM cycle motor phase current as this control algolithm each PWM carrier cycle in the cycle.
2. the motor phase current detection method based on dc bus current as claimed in claim 1, it is characterized in that: one of them increases to non-zero fundamental space vector action time and satisfies the minimum vector PWM carrier cycle of action time in the described same control algolithm cycle, is same control algolithm last in a plurality of PWM carrier cycles in the cycle.
3. the motor phase current detection method based on dc bus current as claimed in claim 2, it is characterized in that: one of them increases to non-zero fundamental space vector action time and satisfies the minimum vector PWM carrier cycle of action time in the described same control algolithm cycle, and the mode that adopts PWM carrier wave rear end to sample is constantly carried out this PWM carrier cycle reconstructing phase current of electromotor.
4. the motor phase current detection method based on dc bus current as claimed in claim 1, it is characterized in that: remove in the same control algolithm cycle one of them and non-zero fundamental space vector is increased to action time satisfy the minimum vector PWM carrier cycle of action time, in other PWM carrier cycles in the same control algolithm cycle, the non-zero fundamental space vector that does not satisfy minimum vector action time action time is identical the action time in each PWM carrier cycle.
5. as the arbitrary described motor phase current detection method based on dc bus current of claim 1 to 4, it is characterized in that: the described control algolithm cycle is 4 to 10 times of PWM carrier cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010039771A CN101769953B (en) | 2010-01-14 | 2010-01-14 | Phase current detection method of motor based on direct-current bus current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010039771A CN101769953B (en) | 2010-01-14 | 2010-01-14 | Phase current detection method of motor based on direct-current bus current |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101769953A true CN101769953A (en) | 2010-07-07 |
| CN101769953B CN101769953B (en) | 2012-10-17 |
Family
ID=42502941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010039771A Active CN101769953B (en) | 2010-01-14 | 2010-01-14 | Phase current detection method of motor based on direct-current bus current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101769953B (en) |
Cited By (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510261A (en) * | 2011-10-27 | 2012-06-20 | 东元总合科技（杭州）有限公司 | Motor phase current reconstruction method based on symmetric pulse width modulation (PWM) carrier wave |
| CN102594249A (en) * | 2012-01-30 | 2012-07-18 | 江阴歆拓电子科技有限公司 | Velocity sensorless vector control method for single bus current detection of three-phase alternating-current motor |
| CN102684577A (en) * | 2012-05-24 | 2012-09-19 | 东南大学 | Fault-tolerant control method of permanent-magnet synchronous motor driving system |
| CN103023414A (en) * | 2013-01-23 | 2013-04-03 | 南京航空航天大学 | Low-cost quick reconstruction method for phase current of permanent magnet motor of fan |
| CN103199791A (en) * | 2013-04-15 | 2013-07-10 | 中颖电子股份有限公司 | Three-phase current reconstruction method using single sampling resistance |
| WO2014026331A1 (en) * | 2012-08-15 | 2014-02-20 | 深圳市英威腾电气股份有限公司 | Phase current reconstruction method and apparatus |
| CN104702138A (en) * | 2015-02-13 | 2015-06-10 | 广东美的制冷设备有限公司 | PWM waveform correcting method in detection of direct bus current by single resistor |
| CN104767430A (en) * | 2015-03-20 | 2015-07-08 | 浙江大学 | Switched reluctance motor system based on bus current sampling and winding current obtaining method thereof |
| CN105406790A (en) * | 2015-12-25 | 2016-03-16 | 上海交通大学 | Frequency converter three-resistance current sampling method based on current prediction |
| CN106059434A (en) * | 2016-06-28 | 2016-10-26 | 广东美的制冷设备有限公司 | Single-current-sensor-based current loop control method and apparatus of moto |
| CN104393819B (en) * | 2014-10-29 | 2017-03-08 | 广东美的制冷设备有限公司 | The driving method of motor and device, motor and air-conditioning |
| CN106802609A (en) * | 2017-03-28 | 2017-06-06 | 河北工业大学 | The device and method of SVPWM is produced based on PC/104 buses and CPLD |
| CN107834927A (en) * | 2017-11-17 | 2018-03-23 | 美的集团股份有限公司 | Motor driven systems and the synchronous of reconstruct phase current phase voltage calculate method, apparatus |
| CN107994827A (en) * | 2017-11-17 | 2018-05-04 | 美的集团股份有限公司 | Motor driven systems and the synchronous of sampling phase current phase voltage calculate method, apparatus |
| CN108155840A (en) * | 2018-01-08 | 2018-06-12 | 哈尔滨工业大学 | A kind of sensor sample phase error suppressing method of phase current reconstruction technology |
| CN108226608A (en) * | 2017-11-28 | 2018-06-29 | 中冶南方（武汉）自动化有限公司 | A kind of PWM inverter DC bus current evaluation method and system |
| CN108633323A (en) * | 2016-01-28 | 2018-10-09 | 三菱电机株式会社 | Power-converting device and electric rotating machine driving device |
| CN108712124A (en) * | 2018-06-20 | 2018-10-26 | 安徽美芝精密制造有限公司 | The method, apparatus and electric machine control system of single resistance detection DC bus current |
| CN109327157A (en) * | 2017-07-28 | 2019-02-12 | 中车株洲电力机车研究所有限公司 | A kind of unsteady flow module tubes current waveform reconstruct device and method |
| CN109450323A (en) * | 2018-11-29 | 2019-03-08 | 宁波诺丁汉大学 | Permanent magnet synchronous motor method for reconstructing phase current based on 12 sector pulse width modulation methods |
| CN110361588A (en) * | 2019-08-08 | 2019-10-22 | 浙江工业大学 | Current detection method for permanent magnet synchronous motor in automobile electric compressor |
| CN110868123A (en) * | 2018-08-09 | 2020-03-06 | 北京大学 | Motor asymmetric SVPWM reconstruction method based on zero vector insertion |
| CN111262489A (en) * | 2018-11-15 | 2020-06-09 | 北京大学 | Motor asymmetric SVPWM reconstruction method based on PWM phase deviation |
| CN112202381A (en) * | 2020-09-30 | 2021-01-08 | 美的威灵电机技术（上海）有限公司 | Drive control method, device, electric appliance and computer readable storage medium |
| CN112436750A (en) * | 2020-10-09 | 2021-03-02 | 杭州士兰微电子股份有限公司 | Control method and control circuit of inverter |
| CN112448619A (en) * | 2019-09-04 | 2021-03-05 | 青岛海尔空调电子有限公司 | Phase current detection method of motor based on PWM control and air conditioner |
| CN112953340A (en) * | 2019-11-26 | 2021-06-11 | 博世力士乐(西安)电子传动与控制有限公司 | Motor current detection method and device |
| CN113056869A (en) * | 2018-10-30 | 2021-06-29 | 西门子股份公司 | Space vector modulation method taking into account minimum switching state time for controlling a polyphase machine |
| CN113206624A (en) * | 2021-05-19 | 2021-08-03 | 金华卓远实业有限公司 | Current sampling reconstruction method based on single resistor |
| CN114070149A (en) * | 2021-11-11 | 2022-02-18 | 北京经纬恒润科技股份有限公司 | Motor bus current determination method and device |
-
2010
- 2010-01-14 CN CN201010039771A patent/CN101769953B/en active Active
Cited By (48)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510261A (en) * | 2011-10-27 | 2012-06-20 | 东元总合科技（杭州）有限公司 | Motor phase current reconstruction method based on symmetric pulse width modulation (PWM) carrier wave |
| CN102510261B (en) * | 2011-10-27 | 2016-06-22 | 东元总合科技（杭州）有限公司 | Method for reconstructing phase current of electromotor based on symmetrical PWM carrier wave |
| CN102594249A (en) * | 2012-01-30 | 2012-07-18 | 江阴歆拓电子科技有限公司 | Velocity sensorless vector control method for single bus current detection of three-phase alternating-current motor |
| CN102684577A (en) * | 2012-05-24 | 2012-09-19 | 东南大学 | Fault-tolerant control method of permanent-magnet synchronous motor driving system |
| CN102684577B (en) * | 2012-05-24 | 2014-06-11 | 东南大学 | Fault-tolerant control method of permanent-magnet synchronous motor driving system |
| CN103765757B (en) * | 2012-08-15 | 2016-05-11 | 深圳市英威腾电气股份有限公司 | A kind of method for reconstructing phase current and device thereof |
| WO2014026331A1 (en) * | 2012-08-15 | 2014-02-20 | 深圳市英威腾电气股份有限公司 | Phase current reconstruction method and apparatus |
| CN103765757A (en) * | 2012-08-15 | 2014-04-30 | 深圳市英威腾电气股份有限公司 | Phase current reconstruction method and apparatus |
| CN103023414A (en) * | 2013-01-23 | 2013-04-03 | 南京航空航天大学 | Low-cost quick reconstruction method for phase current of permanent magnet motor of fan |
| CN103199791A (en) * | 2013-04-15 | 2013-07-10 | 中颖电子股份有限公司 | Three-phase current reconstruction method using single sampling resistance |
| CN103199791B (en) * | 2013-04-15 | 2015-06-24 | 中颖电子股份有限公司 | Three-phase current reconstruction method using single sampling resistance |
| CN104393819B (en) * | 2014-10-29 | 2017-03-08 | 广东美的制冷设备有限公司 | The driving method of motor and device, motor and air-conditioning |
| CN104702138A (en) * | 2015-02-13 | 2015-06-10 | 广东美的制冷设备有限公司 | PWM waveform correcting method in detection of direct bus current by single resistor |
| CN104702138B (en) * | 2015-02-13 | 2017-09-22 | 广东美的制冷设备有限公司 | Pass through PWM waveform modification method during single resistance detection DC bus current |
| CN104767430A (en) * | 2015-03-20 | 2015-07-08 | 浙江大学 | Switched reluctance motor system based on bus current sampling and winding current obtaining method thereof |
| CN104767430B (en) * | 2015-03-20 | 2017-10-27 | 浙江大学 | A kind of switched reluctance motor system and its winding current acquisition methods sampled based on bus current |
| CN105406790A (en) * | 2015-12-25 | 2016-03-16 | 上海交通大学 | Frequency converter three-resistance current sampling method based on current prediction |
| CN105406790B (en) * | 2015-12-25 | 2018-08-31 | 上海交通大学 | The three resistor current method of sampling of frequency converter based on current forecasting |
| CN108633323A (en) * | 2016-01-28 | 2018-10-09 | 三菱电机株式会社 | Power-converting device and electric rotating machine driving device |
| CN108633323B (en) * | 2016-01-28 | 2021-07-13 | 三菱电机株式会社 | Power conversion device and rotating electric machine drive device |
| CN106059434B (en) * | 2016-06-28 | 2019-05-31 | 广东美的制冷设备有限公司 | The current loop control method and device of motor based on single current sensor |
| CN106059434A (en) * | 2016-06-28 | 2016-10-26 | 广东美的制冷设备有限公司 | Single-current-sensor-based current loop control method and apparatus of moto |
| CN106802609A (en) * | 2017-03-28 | 2017-06-06 | 河北工业大学 | The device and method of SVPWM is produced based on PC/104 buses and CPLD |
| CN109327157B (en) * | 2017-07-28 | 2020-02-14 | 中车株洲电力机车研究所有限公司 | Current waveform reconstruction device and method for tube of current transformation module |
| CN109327157A (en) * | 2017-07-28 | 2019-02-12 | 中车株洲电力机车研究所有限公司 | A kind of unsteady flow module tubes current waveform reconstruct device and method |
| CN107994827A (en) * | 2017-11-17 | 2018-05-04 | 美的集团股份有限公司 | Motor driven systems and the synchronous of sampling phase current phase voltage calculate method, apparatus |
| CN107834927A (en) * | 2017-11-17 | 2018-03-23 | 美的集团股份有限公司 | Motor driven systems and the synchronous of reconstruct phase current phase voltage calculate method, apparatus |
| US11038451B2 (en) | 2017-11-17 | 2021-06-15 | Midea Group Co., Ltd. | Method and device for driving motors |
| CN108226608A (en) * | 2017-11-28 | 2018-06-29 | 中冶南方（武汉）自动化有限公司 | A kind of PWM inverter DC bus current evaluation method and system |
| CN108155840A (en) * | 2018-01-08 | 2018-06-12 | 哈尔滨工业大学 | A kind of sensor sample phase error suppressing method of phase current reconstruction technology |
| CN108712124A (en) * | 2018-06-20 | 2018-10-26 | 安徽美芝精密制造有限公司 | The method, apparatus and electric machine control system of single resistance detection DC bus current |
| CN110868123B (en) * | 2018-08-09 | 2022-03-25 | 北京大学 | Motor asymmetric SVPWM reconstruction method based on zero vector insertion |
| CN110868123A (en) * | 2018-08-09 | 2020-03-06 | 北京大学 | Motor asymmetric SVPWM reconstruction method based on zero vector insertion |
| CN113056869A (en) * | 2018-10-30 | 2021-06-29 | 西门子股份公司 | Space vector modulation method taking into account minimum switching state time for controlling a polyphase machine |
| CN111262489A (en) * | 2018-11-15 | 2020-06-09 | 北京大学 | Motor asymmetric SVPWM reconstruction method based on PWM phase deviation |
| CN111262489B (en) * | 2018-11-15 | 2023-12-22 | 北京大学 | Motor asymmetric SVPWM reconstruction method based on PWM phase shift |
| CN109450323B (en) * | 2018-11-29 | 2021-04-13 | 宁波诺丁汉大学 | Permanent magnet synchronous motor phase current reconstruction method based on twelve-sector pulse width modulation method |
| CN109450323A (en) * | 2018-11-29 | 2019-03-08 | 宁波诺丁汉大学 | Permanent magnet synchronous motor method for reconstructing phase current based on 12 sector pulse width modulation methods |
| CN110361588A (en) * | 2019-08-08 | 2019-10-22 | 浙江工业大学 | Current detection method for permanent magnet synchronous motor in automobile electric compressor |
| WO2021043240A1 (en) * | 2019-09-04 | 2021-03-11 | 青岛海尔空调电子有限公司 | Pwm control-based motor phase current measurement method and air conditioner |
| CN112448619A (en) * | 2019-09-04 | 2021-03-05 | 青岛海尔空调电子有限公司 | Phase current detection method of motor based on PWM control and air conditioner |
| CN112953340A (en) * | 2019-11-26 | 2021-06-11 | 博世力士乐(西安)电子传动与控制有限公司 | Motor current detection method and device |
| CN112202381A (en) * | 2020-09-30 | 2021-01-08 | 美的威灵电机技术（上海）有限公司 | Drive control method, device, electric appliance and computer readable storage medium |
| CN112202381B (en) * | 2020-09-30 | 2022-03-25 | 美的威灵电机技术（上海）有限公司 | Drive control method, device, electric appliance and computer readable storage medium |
| CN112436750A (en) * | 2020-10-09 | 2021-03-02 | 杭州士兰微电子股份有限公司 | Control method and control circuit of inverter |
| CN113206624A (en) * | 2021-05-19 | 2021-08-03 | 金华卓远实业有限公司 | Current sampling reconstruction method based on single resistor |
| CN114070149A (en) * | 2021-11-11 | 2022-02-18 | 北京经纬恒润科技股份有限公司 | Motor bus current determination method and device |
| CN114070149B (en) * | 2021-11-11 | 2023-06-16 | 北京经纬恒润科技股份有限公司 | Motor bus current determination method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101769953B (en) | 2012-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101769953B (en) | Phase current detection method of motor based on direct-current bus current | |
| CN101917157B (en) | Method for reconstructing phase current of electromotor | |
| CN102510261B (en) | Method for reconstructing phase current of electromotor based on symmetrical PWM carrier wave | |
| JP4071769B2 (en) | Space vector pulse width modulator for driving permanent magnet motors. | |
| CN103746585B (en) | Based on the multi-electrical level inverter neutral-point voltage balance method of hybrid modulation | |
| CN107547027B (en) | Single-resistor motor current sampling method | |
| EP2852047A1 (en) | Phase current reconstruction method and apparatus | |
| KR101621994B1 (en) | Control apparatus for regenerative medium voltage inverter | |
| CN102624276A (en) | Novel dead-zone effect compensation method of AC servo inverter | |
| CN104767434A (en) | Rotor phase commutation position detection and phase commutation control method for brushless direct current motor | |
| JP2015186431A (en) | Power converter, controller for power converter, and control method for power converter | |
| CN104821601A (en) | Three-phase photovoltaic grid-connected inverter control device | |
| CN109510496A (en) | No electrolytic capacitor NPC three-level inverter neutral-point voltage balance method and system | |
| CN104753375B (en) | A kind of three-level inverter DPWM control methods | |
| CN104377978A (en) | Three-level inverter shifting to two-phase bridge arm for running during single-phase bridge arm fault | |
| CN105429498A (en) | Phase current reconstruction method based on NPC three-level SVPWM inverter | |
| CN105743330B (en) | A kind of twin inverter list SVM simplifies modulation algorithm | |
| CN108400737A (en) | Dead-zone compensation method, circuit, power electronic equipment and computer storage media | |
| CN108092534A (en) | The control method and device of single-phase Five-level converter | |
| JP2016103940A (en) | Motor controller | |
| CN108599638B (en) | Method for identifying stator flux linkage of permanent magnet synchronous motor | |
| CN106033947A (en) | Three-phase inverter circuit for driving three-phase AC motor and vector modulation control method thereof | |
| CN104753378A (en) | Three-level inverter midpoint potential balance control method | |
| CN205051620U (en) | SPWM's over -modulation control system in electric machine control for electric motor car | |
| CN111740621B (en) | Three-phase PWM rectifier fault-tolerant operation method based on simplified model predictive control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |