CN105958889A - Single-resistor current sampling method and system - Google Patents
Single-resistor current sampling method and system Download PDFInfo
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- CN105958889A CN105958889A CN201610466281.9A CN201610466281A CN105958889A CN 105958889 A CN105958889 A CN 105958889A CN 201610466281 A CN201610466281 A CN 201610466281A CN 105958889 A CN105958889 A CN 105958889A
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- 238000006243 chemical reaction Methods 0.000 claims description 7
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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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/14—Estimation or adaptation of motor parameters, e.g. rotor time constant, flux, speed, current or voltage
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- Control Of Ac Motors In General (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention relates to a single-resistor current sampling method and a system, wherein the single-resistor current sampling method comprises the following steps: judging whether the duty ratio control signal reaches a duty ratio limit condition or not according to a first difference value, a second difference value and a time intermediate value of the duty ratio control signal in the running process of the motor; wherein, the first difference value is the difference between the time middle value and the time minimum value, and the second difference value is the difference between the time maximum value and the time middle value; if the duty ratio control signal reaches the duty ratio limit condition, acquiring the motor running frequency of the motor and predicting the running angle of a rotor in the motor in the next control beat according to the motor running frequency; and acquiring a first phase current and a second phase current of the motor according to the operating angle of the rotor at the next control beat. The single-resistor current sampling method and the single-resistor current sampling system provided by the invention ensure the integrity of a single-resistor current sampling scheme in the running process of the motor and improve the single-resistor current sampling effect.
Description
Technical field
The present invention relates to motor control technology field, particularly relate to a kind of single resistor current method of sampling and be
System.
Background technology
Use single resistance that the three-phase of motor carries out this technology of current sample and have that control circuit is simple, cost
Low advantage, therefore it is gradually replacing the electric current that double resistance and three resistance samplings etc. control for motor and adopts
Sample loading mode.In the practical operation of single resistor current sampling, need to ensure the abundance in sampling time, its base
Present principles is to use dutycycle compensation method, is increased by maximum duty cycle, and minimum duty cycle reduces.
Traditional sampling scheme, is usually and attempts, on the premise of ensureing that dutycycle is constant, moving modulating wave
Dynamic phase place so that maximum duty cycle and middle dutycycle, between middle dutycycle and minimum duty cycle
Time interval meets the sample requirement of ADC.
Although above-mentioned sampling plan can ensure the abundance in sampling time to a certain extent, but, work as motor
The sent duty cycle control signal of three-phase reach duty cycle limit condition, i.e. maximum duty cycle close to 100% and
When minimum duty cycle is close to 0%, the movement of modulating wave phase place can not be realized, therefore by travel(l)ing phase to protect
The scheme of card sampling time abundance has limitation, thus affects the effect of single resistor current sampling.
Summary of the invention
Based on this, it is necessary to for the technical problem of the single resistor current sample effect of conventional art impact, it is provided that
A kind of single resistor current method of sampling and system.
A kind of single resistor current method of sampling, comprises the steps:
According to the first difference of duty cycle control signal, the second difference and time intermediate value in motor operation course
Judge whether described duty cycle control signal reaches duty cycle limit condition；Wherein, when described first difference is
Between the difference of intermediate value and minimal time value, the second difference is the difference of time maximum and time intermediate value；
If duty cycle control signal reaches duty cycle limit condition, then obtain the motor running frequency of motor
The operation angle clapped in next control according to described motor running frequency pre-measured motor rotor；
Obtain the first phase current and second phase current of motor at next operation angle controlling to clap according to rotor.
A kind of single resistor current sampling system, including:
Judge module, for according to the first difference of duty cycle control signal in motor operation course, second poor
Value and time intermediate value judge whether described duty cycle control signal reaches duty cycle limit condition；Wherein, institute
Stating the difference that the first difference is time intermediate value and minimal time value, the second difference is in time maximum and time
Between value difference；
First acquisition module, if reaching duty cycle limit condition for duty cycle control signal, then obtains motor
Motor running frequency
Prediction module, for the fortune clapped in next control according to described motor running frequency pre-measured motor rotor
Row angle；
Second acquisition module, for obtaining the first phase of motor according to rotor at next operation angle controlling to clap
Electric current and the second phase current.
Above-mentioned single resistor current method of sampling and system, it is possible to use in motor operation course, three-phase is sent
First difference of duty cycle control signal, the second difference and time intermediate value are to corresponding duty cycle control signal
Detect, detecting whether duty cycle control signal reaches duty cycle limit condition, i.e. using single resistance
The three-phase of motor is carried out current sample, and in duty cycle control signal, maximum duty cycle is close to 100% and minimum
When dutycycle is close to 0%, the motor running frequency of motor can be obtained, it was predicted that rotor controls the fortune of bat at next
Row angle, obtains the first phase current and second phase of motor further according to rotor at next operation angle controlling to clap
Electric current, it is ensured that the integrity of single resistor current sampling plan in motor operation course, improves single resistance electricity
The effect of stream sampling.
Accompanying drawing explanation
Fig. 1 is single resistor current method of sampling flow chart of an embodiment；
Fig. 2 is single resistor current sampling apparatus structural representation of an embodiment；
Fig. 3 is the first phase current phase-shift compensation schematic diagram of an embodiment；
Fig. 4 is single resistor current sampling system structural representation of an embodiment.
Detailed description of the invention
Below in conjunction with the accompanying drawings single resistor current method of sampling of the present invention and the detailed description of the invention of system are made in detail
Thin description.
Single resistor current method of sampling flow chart of an embodiment is represented, including such as with reference to shown in Fig. 1, Fig. 1
Lower step:
S10, according to the first difference of duty cycle control signal in motor operation course, the second difference with in the time
Between value judge whether described duty cycle control signal reaches duty cycle limit condition；Wherein, described first difference
For the difference of time intermediate value Yu minimal time value, the second difference is the difference of time maximum and time intermediate value；
Single resistor current sampling apparatus that motor three-phase current is corresponding can be as in figure 2 it is shown, Fig. 2 be in motor
Frequency conversion three-phase inverting circuit, sampling resistor 110 is located on bus, sample bus current, Fig. 2 opens
Close the three-phase of the most corresponding motor of branch road at pipe place.Under normal circumstances, sampling resistor 110 is carried out electric current
Sampling can obtain the biphase current (the first phase current and the second phase current) of motor, by three-phase electricity stream gravity
Structures etc. process the third phase electric current that can obtain motor.
When duty cycle control signal at motor reaches duty cycle limit condition, it is impossible to realize associated modulation ripple
Phase shift, now samples to the sampling resistor on bus cannot accurately obtain the first phase current and
Two-phase current.
In one embodiment, above-mentioned according to the first difference of duty cycle control signal in motor operation course,
Second difference and time intermediate value judge whether described duty cycle control signal reaches the step of duty cycle limit condition
Suddenly may include that
Judge T1≤TminOr T2≤TminWhether set up；Wherein, T1Represent in motor operation course and account for
Empty the first difference than control signal, TminRepresent the minimal sampling time needed for the sampling of motor list resistor current,
T2Second difference of duty cycle control signal in motor operation course；
The most then determine whether Tb1≤TminOr Tb1+T min≥0.5TprdWhether set up；Wherein,
Tb1Represent the time intermediate value of duty cycle control signal, T in motor operation courseprdRepresent Duty ratio control letter
Number signal period；
The most then judge that duty cycle control signal reaches duty cycle limit condition.
In the present embodiment, reach duty cycle limit condition, i.e. maximum duty cycle at duty cycle control signal close
100% and minimum duty cycle close to 0%, need to carry out by other means the first phase current and two phase electricity
The acquisition of stream, with the first phase current acquired in guarantee and the accuracy of the second phase current.
Judge that whether the first difference of duty cycle control signal in motor operation course is less than or equal to motor list
Minimal sampling time needed for resistor current sampling；
Judge that in motor operation course, the time intermediate value of duty cycle control signal is the least the most further
In or equal to motor list resistor current sample needed for minimal sampling time；
The most then judge that duty cycle control signal reaches duty cycle limit condition.
S20, if duty cycle control signal reaches duty cycle limit condition, then obtains the motor running frequency of motor；
The parameter set when can start according to corresponding motor of above-mentioned motor running frequency is read out.
S30, the operation angle clapped in next control according to described motor running frequency pre-measured motor rotor；
Motor can utilize the measuring instruments such as related sensor to survey at the operation angle of running rotor
Amount, it is also possible to calculate according to the relevant operational factor of motor, it is generally the case that exist if obtaining rotor
The current operation angle controlling to clap, according to motor running frequency and the signal period of duty cycle control signal, can
To go out, by correlation computations formula predictions, the operation angle that rotor is clapped in next control.
In one embodiment, above-mentioned according to described motor running frequency calculate motor rotor next control
The step of the operation angle clapped may include that
According to θn=θn-1+fc*TprdCalculate θn；Wherein, θnRepresent that motor rotor is in the current operation controlling and clapping
Angle, θn-1Represent that motor rotor controls the operation angle of bat, f at nextcRepresent motor running frequency, Tprd
Represent the signal period of duty cycle control signal；
According to θn+1=θn+fc*TprdCalculate θn+1；θn+1Represent that motor rotor controls the operation angle of bat at next
Degree.
Above-mentioned θn-1Can be measured by related sensor, fcAnd TprdFortune that can be set when electric motor starting
Line parameter reads.
The present embodiment carries out, by concrete formula, the operation angle θ that rotor is clapped in next controln-1Prediction, permissible
Improve the accuracy of the operation angle predicted.
S40, obtains the first phase current and the two phase electricity of motor according to rotor at next operation angle controlling to clap
Stream.
In above-mentioned steps, it is possible to use for electromagnetic relationship correlating transforms (as Park conversion or Clark
Conversion etc.) rotor predicted is processed at next operation angle controlling to clap, to obtain motor respectively
First phase current and the second phase current.
In one embodiment, above-mentioned operation angle clapped in next control according to rotor obtains the first of motor
The step of phase current and the second phase current may include that
Rotor is carried out Park conversion at next operation angle controlling to clap；
Result according to Park conversion obtains the first phase current and second phase current of motor.
Single resistor current method of sampling that the present invention provides, it is possible to use in motor operation course, three-phase is sent
The first difference of duty cycle control signal, the second difference and time intermediate value corresponding Duty ratio control is believed
Number detect, detecting whether duty cycle control signal reaches duty cycle limit condition, i.e. using single electricity
Hindering and the three-phase of motor is carried out current sample, in duty cycle control signal, maximum duty cycle is close to 100% and
When little dutycycle is close to 0%, the motor running frequency of motor can be obtained, it was predicted that rotor controls bat at next
Operation angle, obtains first phase current and second of motor further according to rotor at next operation angle controlling to clap
Phase current, it is ensured that the integrity of single resistor current sampling plan in motor operation course, improves single resistance
The effect of current sample.
In one embodiment, above-mentioned according to the first difference of duty cycle control signal in motor operation course,
Second difference and time intermediate value judge whether described duty cycle control signal reaches the step of duty cycle limit condition
Can also include before Zhou:
The minimal time value of motor three-phase duty cycle control signal is obtained, in the middle of the time in motor operation course
Value and time maximum；
Calculate the difference of described time intermediate value and minimal time value, obtain the first difference；
Calculate the difference of described time maximum and time intermediate value, obtain the second difference.
Above-mentioned first difference T1=Tb1-Ta1, the second difference T2=Tc1-Tb1, wherein, Ta1Represent motor three
Send the minimal time value of duty cycle control signal, T mutuallyb1Represent that motor three-phase sends duty cycle control signal
Time intermediate value, Tc1Represent that motor three-phase sends the time maximum of duty cycle control signal.
The present embodiment is to minimal time value, time intermediate value and the time of motor three-phase duty cycle control signal
Whether big value, calculate corresponding first difference and the second difference with this, reach for follow-up duty cycle control signal
The judgement of duty cycle limit condition provides Data Source accurately.
In one embodiment, above-mentioned according to the first difference of duty cycle control signal in motor operation course,
Second difference and time intermediate value judge whether described duty cycle control signal reaches the step of duty cycle limit condition
Can also include after Zhou:
If described duty cycle control signal is not reaching to duty cycle limit condition, it is more than in described first difference
During the little sampling time, the first phase current is sampled；When described second difference is more than minimal sampling time,
Second phase current is sampled.
In the present embodiment, if T1＞ Tmin, can directly the first phase current be sampled, to improve first
The efficiency of phase current sampling, it is also possible to the effective marker position 1 to the first phase current sampling is the most permissible to show
Directly the first phase current is carried out high efficiency sampling；If T2＞ Tmin, can directly the second phase current be carried out
Sampling, to improve the efficiency of the second phase current sampling, it is also possible to the effective marker position to the second phase current sampling
Put 1, now directly the second phase current can be carried out high efficiency sampling to show.
In one embodiment, above-mentioned according to the first difference of duty cycle control signal in motor operation course,
Second difference and time intermediate value judge whether described duty cycle control signal reaches the step of duty cycle limit condition
Can also include after Zhou:
If described duty cycle control signal is not reaching to duty cycle limit condition, then the first difference less than or
During equal to minimal sampling time, determine whether that whether described time intermediate value is more than minimal sampling time；
The most then the first phase current is carried out phase-shift compensation post-sampling electric current；
When the second difference is less than or equal to minimal sampling time, it is judged that Tb1+T min≥0.5TprdWhether
Set up；Wherein, Tb1Express time intermediate value, TminRepresent minimal sampling time, TprdRepresent Duty ratio control
The signal period of signal；
The most then the second phase current is carried out phase-shift compensation post-sampling electric current.
The present embodiment is at T1≤TminAnd Tb1＞ TminTime, after the first phase current can being carried out phase-shift compensation
Sample rate current；At T2≤TminAnd Tb1+T min≥0.5TprdTime, the second phase current can be carried out phase shift
Compensate post-sampling electric current.It is when the first phase or the second phase sampler time are shorter, by carrying out dutycycle
Phase-shift compensation, makes voltage-phase undistorted, and dutycycle is unchanged, can overcome in the sampling time shorter, account for
The empty inaccurate problem of control caused than change.
As an embodiment, the above-mentioned step that first phase current carries out phase-shift compensation post-sampling electric current is permissible
Including:
According to Ta1-(Tmin-T1) determine that the rising edge that in duty cycle control signal, minimal time value is corresponding sends
Time and level are along the persistent period；Wherein, Ta1Express time minima, T1Represent the first difference.
The present embodiment is by Ta1-(Tmin-T1) it is identified as minimal time value correspondence in duty cycle control signal
Rising edge send time and level along the persistent period, the dutycycle in duty cycle control signal can be kept not
Become, to ensure the abundance in sampling time.
As an embodiment, the above-mentioned step that second phase current carries out phase-shift compensation post-sampling electric current is permissible
Including:
According to Tc1-(Tmin-T2) determine time maximum in duty cycle control signal corresponding rising edge send
Time and low level are along the persistent period；Wherein, Tc1Express time maximum, T1Represent the first difference.
The present embodiment is by Tc1-(Tmin-T2) to be identified as time maximum in duty cycle control signal corresponding
Rising edge sends time and level along the persistent period, and the dutycycle in duty cycle control signal can be kept constant,
To ensure the abundance in sampling time.
Fig. 3 is the first phase current phase-shift compensation schematic diagram of an embodiment, as it is shown on figure 3,
T1=Tb1-Ta1, T2=Tc1-Tb1, Ta1Represent that motor three-phase sends the minimal time of duty cycle control signal
Value, Tb1Represent that motor three-phase sends the time intermediate value of duty cycle control signal, Tc1Represent that motor three-phase sends
The time maximum of duty cycle control signal, TminWhen representing the minimum sampling needed for the sampling of motor list resistor current
Between.As it is shown on figure 3, after to the first phase current phase-shift compensation, Ta2=Ta1-(Tmin-T1),
Ta'2=Ta1-(Tmin-T1), above-mentioned Ta2Represent that motor three-phase sends the minimal time of duty cycle control signal
After value phase shift, rising edge sends time, Ta'2Represent that motor three-phase sends the minimal time value of duty cycle control signal
After phase shift, low level is along the persistent period, and after phase-shift compensation, in corresponding duty cycle control signal, dutycycle keeps
Constant, thereby may be ensured that the effectiveness of current sample.
With reference to shown in Fig. 4, Fig. 4 is single resistor current sampling system structural representation of an embodiment, bag
Include:
Judge module 10, for according to the first difference of duty cycle control signal in motor operation course, second
Difference and time intermediate value judge whether described duty cycle control signal reaches duty cycle limit condition；Wherein,
Described first difference is the difference of time intermediate value and minimal time value, and the second difference is time maximum and time
The difference of intermediate value；
First acquisition module 20, if reaching duty cycle limit condition for duty cycle control signal, then obtains electricity
The motor running frequency of machine
Prediction module 30, for controlling bat according to described motor running frequency pre-measured motor rotor at next
Operation angle；
Second acquisition module 40, for obtaining the first of motor according to rotor at next operation angle controlling to clap
Phase current and the second phase current.
Single resistor current method of sampling one that single resistor current sampling system that the present invention provides provides with the present invention
One is corresponding, and technical characteristic and beneficial effect thereof that the embodiment in described single resistor current method of sampling illustrates are equal
Be applicable to the embodiment of single resistor current sampling system, hereby give notice that.
Each technical characteristic of embodiment described above can combine arbitrarily, represents and makes description succinct, not
The all possible combination of each technical characteristic in above-described embodiment is all described, but, as long as these
There is not contradiction in the combination of technical characteristic, all should recognize expression is the scope that this specification is recorded.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes and relatively represents concrete and detailed
Carefully, but therefore can not understand and represent restriction to patent of invention scope.It should be pointed out that, for this
For the those of ordinary skill in field, without departing from the inventive concept of the premise, it is also possible to make some changes
Shape and improvement, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with
Claims represent accurate.
Claims (10)
1. single resistor current method of sampling, it is characterised in that comprise the steps:
According to the first difference of duty cycle control signal, the second difference and time intermediate value in motor operation course
Judge whether described duty cycle control signal reaches duty cycle limit condition；Wherein, when described first difference is
Between the difference of intermediate value and minimal time value, the second difference is the difference of time maximum and time intermediate value；
If duty cycle control signal reaches duty cycle limit condition, then obtain the motor running frequency of motor；
The operation angle clapped in next control according to described motor running frequency pre-measured motor rotor；
Obtain the first phase current and second phase current of motor at next operation angle controlling to clap according to rotor.
Single resistor current method of sampling the most according to claim 1, it is characterised in that described according to electricity
First difference of duty cycle control signal in machine running, the second difference and time intermediate value account for described in judging
The step whether sky reaches duty cycle limit condition than control signal includes:
Judge T1≤TminOr T2≤TminWhether set up；Wherein, T1Represent in motor operation course and account for
Empty the first difference than control signal, TminRepresent the minimal sampling time needed for the sampling of motor list resistor current,
T2Second difference of duty cycle control signal in motor operation course；
The most then determine whether Tb1≤TminOr Tb1+Tmin≥0.5TprdWhether set up；Wherein,
Tb1Represent the time intermediate value of duty cycle control signal, T in motor operation courseprdRepresent Duty ratio control letter
Number signal period；
The most then judge that duty cycle control signal reaches duty cycle limit condition.
Single resistor current method of sampling the most according to claim 1, it is characterised in that described according to institute
State motor running frequency calculating motor rotor to include in the step of next operation angle controlling bat:
According to θn=θn-1+fc*TprdCalculate θn；Wherein, θnRepresent that motor rotor is in the current operation controlling and clapping
Angle, θn-1Represent that motor rotor controls the operation angle of bat, f at nextcRepresent motor running frequency, Tprd
Represent the signal period of duty cycle control signal；
According to θn+1=θn+fc*TprdCalculate θn+1；θn+1Represent that motor rotor controls the operation angle of bat at next
Degree.
Single resistor current method of sampling the most according to claim 1, it is characterised in that described basis turns
Son includes in the step of the first phase current and the second phase current that next operation angle controlling to clap obtains motor:
Rotor is carried out Park conversion at next operation angle controlling to clap；
Result according to Park conversion obtains the first phase current and second phase current of motor.
5. according to the single resistor current method of sampling described in any one of Claims 1-4, it is characterised in that
Described according to the first difference of duty cycle control signal, the second difference and time intermediate value in motor operation course
Judge described duty cycle control signal also includes before whether reaching the step of duty cycle limit condition:
The minimal time value of motor three-phase duty cycle control signal is obtained, in the middle of the time in motor operation course
Value and time maximum；
Calculate the difference of described time intermediate value and minimal time value, obtain the first difference；
Calculate the difference of described time maximum and time intermediate value, obtain the second difference.
Single resistor current method of sampling the most according to claim 5, it is characterised in that described according to electricity
First difference of duty cycle control signal in machine running, the second difference and time intermediate value account for described in judging
Sky also includes after whether reaching the step of duty cycle limit condition than control signal:
If described duty cycle control signal is not reaching to duty cycle limit condition, it is more than in described first difference
During the little sampling time, the first phase current is sampled；When described second difference is more than minimal sampling time,
Second phase current is sampled.
Single resistor current method of sampling the most according to claim 5, it is characterised in that described according to electricity
First difference of duty cycle control signal in machine running, the second difference and time intermediate value account for described in judging
Sky also includes after whether reaching the step of duty cycle limit condition than control signal:
If described duty cycle control signal is not reaching to duty cycle limit condition, then the first difference less than or
During equal to minimal sampling time, determine whether that whether described time intermediate value is more than minimal sampling time；
The most then the first phase current is carried out phase-shift compensation post-sampling electric current；
When the second difference is less than or equal to minimal sampling time, it is judged that Tb1+Tmin≥0.5TprdWhether
Set up；Wherein, Tb1Express time intermediate value, TminRepresent minimal sampling time, TprdRepresent Duty ratio control
The signal period of signal；
The most then the second phase current is carried out phase-shift compensation post-sampling electric current.
Single resistor current method of sampling the most according to claim 7, it is characterised in that described to first
Phase current carries out the step of phase-shift compensation post-sampling electric current and includes:
According to Ta1-(Tmin-T1) determine that the rising edge that in duty cycle control signal, minimal time value is corresponding sends
Time and level are along the persistent period；Wherein, Ta1Express time minima, T1Represent the first difference.
Single resistor current method of sampling the most according to claim 7, it is characterised in that described to second
Phase current carries out the step of phase-shift compensation post-sampling electric current and includes:
According to Tc1-(Tmin-T2) determine time maximum in duty cycle control signal corresponding rising edge send
Time and low level are along the persistent period；Wherein, Tc1Express time maximum, T1Represent the first difference.
10. a single resistor current sampling system, it is characterised in that including:
Judge module, for according to the first difference of duty cycle control signal in motor operation course, second poor
Value and time intermediate value judge whether described duty cycle control signal reaches duty cycle limit condition；Wherein, institute
Stating the difference that the first difference is time intermediate value and minimal time value, the second difference is in time maximum and time
Between value difference；
First acquisition module, if reaching duty cycle limit condition for duty cycle control signal, then obtains motor
Motor running frequency
Prediction module, for the fortune clapped in next control according to described motor running frequency pre-measured motor rotor
Row angle；
Second acquisition module, for obtaining the first phase of motor according to rotor at next operation angle controlling to clap
Electric current and the second phase current.
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| CN106872766A (en) * | 2017-03-13 | 2017-06-20 | 苏州半唐电子有限公司 | A kind of phase-shift compensation method of single resistor current sampling |
| CN106933147A (en) * | 2017-03-13 | 2017-07-07 | 苏州半唐电子有限公司 | A kind of phase-shift compensation method of single resistor current sampling |
| CN108667378A (en) * | 2018-05-22 | 2018-10-16 | 北京因时机器人科技有限公司 | A kind of list resistance dephased current method of sampling and device |
| CN110034712A (en) * | 2019-05-21 | 2019-07-19 | 四川虹美智能科技有限公司 | A kind of list resistance sampling control method and device |
| CN110855215A (en) * | 2018-08-21 | 2020-02-28 | 广东威灵汽车部件有限公司 | PWM phase shifting method and PWM phase shifting device of permanent magnet motor |
| CN112910366A (en) * | 2019-12-03 | 2021-06-04 | 广东美的白色家电技术创新中心有限公司 | Single-resistor current sampling method, chip and electronic equipment |
| CN112994576A (en) * | 2019-12-18 | 2021-06-18 | 杭州三花研究院有限公司 | Motor control method and system and electronic equipment |
| 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 |
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| CN113872484A (en) * | 2021-09-27 | 2021-12-31 | 佛山市顺德区美的电子科技有限公司 | Three-phase current reconstruction method, device, equipment and storage medium |
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| CN106872766B (en) * | 2017-03-13 | 2019-04-02 | 苏州半唐电子有限公司 | A kind of phase-shift compensation method of list resistor current sampling |
| CN106872766A (en) * | 2017-03-13 | 2017-06-20 | 苏州半唐电子有限公司 | A kind of phase-shift compensation method of single resistor current sampling |
| CN108667378A (en) * | 2018-05-22 | 2018-10-16 | 北京因时机器人科技有限公司 | A kind of list resistance dephased current method of sampling and device |
| CN108667378B (en) * | 2018-05-22 | 2020-04-24 | 北京因时机器人科技有限公司 | Single-resistor phase-shift current sampling method and device |
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| CN112910366A (en) * | 2019-12-03 | 2021-06-04 | 广东美的白色家电技术创新中心有限公司 | Single-resistor current sampling method, chip and electronic equipment |
| CN112910366B (en) * | 2019-12-03 | 2023-03-07 | 广东美的白色家电技术创新中心有限公司 | Single-resistor current sampling method, chip and electronic equipment |
| CN112994576A (en) * | 2019-12-18 | 2021-06-18 | 杭州三花研究院有限公司 | Motor control method and system and electronic equipment |
| CN112994576B (en) * | 2019-12-18 | 2022-08-16 | 杭州绿能新能源汽车部件有限公司 | Motor control method and system and electronic equipment |
| CN113285650A (en) * | 2021-05-17 | 2021-08-20 | 青岛海信日立空调***有限公司 | Air conditioning system |
| 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 |
| CN113206624B (en) * | 2021-05-19 | 2022-06-17 | 金华卓远实业有限公司 | Current sampling reconstruction method based on single resistor |
| CN113872484A (en) * | 2021-09-27 | 2021-12-31 | 佛山市顺德区美的电子科技有限公司 | Three-phase current reconstruction method, device, equipment and storage medium |
| CN113872484B (en) * | 2021-09-27 | 2024-01-19 | 佛山市顺德区美的电子科技有限公司 | Three-phase current reconstruction method, device, equipment and storage medium |
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