CN105548657B - The phase current signal method of sampling and device, electric machine controller and electric car - Google Patents
The phase current signal method of sampling and device, electric machine controller and electric car Download PDFInfo
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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Abstract
The invention discloses a kind of phase current signal method of sampling and devices, electric machine controller and electric car.This method comprises: acquiring the output of sensor by multichannel analog signals acquisition channel, multiple sampled signals are obtained, wherein sensor is used for the phase current of Control of Induction Motors device output, exports sampled signal；And the sampled result of phase current is obtained according to multiple sampled signals.Through the invention, solve the problems, such as that phase current signal sampling precision is lower in the related technology.
Description
Technical field
The present invention relates to signal acquisition fields, in particular to a kind of phase current signal method of sampling and device, motor
Controller and electric car.
Background technique
Electric car is a kind of by vehicle mounted dynamic battery power supply, the motor-driven environmentally protective vehicles, electric car
It is the developing direction of auto industry, and current emphasis is encouraged and the technical products of development.One of core technology of electric car
It is exactly the technology of motor and electric machine controller, electric car mostly uses permanent magnet synchronous motor as motor, electric machine controller at present
By being frequency-changing AC electricity by the DC power supply inversion of power battery, the motor output torque of exchange is driven.In digitized friendship
It flows in motor control, accurate phase current acquisition and processing are the key that realize high-performance closed-loop control system, if without standard
True phase current signal cannot realize efficient closed-loop control.To time of phase current sensing motor control program arteries and veins
Width modulated (Pulse-Width Modulation, abbreviation PWM) is rushed in interrupt cycle, by Hall current sensor using suddenly
It is voltage signal that current signal is passed through electromagnetic conversion by your principle, and the analog signal that voltage signal is input to electric machine controller is adopted
Collect port, by analog signal sampling and data processing, the voltage signal values of input is converted into actual phase current values, are used for
Realize algorithm and the fault diagnosis processing etc. of motor control program.In the related technology, the voltage of Hall current sensor output
Signal only calls one acquisition conversion process, due to insulated gate bipolar transistor (Insulated Gate Bipolar
Transistor, abbreviation IGBT) constant power devices switch frequency is higher, and the opening of power device turns off and can all influence current wave
Shape, and low pressure Acquisition Circuit, vulnerable to interference, what these got after all causing acquisition to be converted is used for motor control algorithms
The required precision of high-precision closed-loop control is not achieved in three-phase current signal data distortion.
For the lower problem of phase current signal sampling precision in the related technology, effective solution side is not yet proposed at present
Case.
Summary of the invention
The main purpose of the present invention is to provide a kind of phase current signal method of sampling and devices, electric machine controller and electronic
Automobile, to solve the problems, such as that phase current signal sampling precision is lower in the related technology.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of phase current signal method of sampling.It should
Method includes: that the output of sensor is acquired by multichannel analog signals acquisition channel, obtains multiple sampled signals, wherein sensing
Device is used for the phase current of Control of Induction Motors device output, exports sampled signal；And phase current is obtained according to multiple sampled signals
Sampled result.
Further, sensor is Hall current sensor, for the phase current of Control of Induction Motors device output, output electricity
Signal is pressed, the output of sensor is acquired by multichannel analog signals acquisition channel, obtaining multiple sampled signals includes: to pass through multichannel
Collection of simulant signal channel acquires the output of Hall current sensor, obtains multiple voltage sampling signals, is believed according to multiple samplings
Number obtain phase current sampled result include: that multiple voltage sampling signals are calculated, obtain the sampled result of phase current.
Further, sensor is Hall current sensor, and phase current is three-phase current, multichannel analog signals acquisition channel
Including three groups of collection of simulant signal channels, the output of sensor is acquired by multichannel analog signals acquisition channel, obtains multiple adopt
Sample signal includes: the output for acquiring three Hall current sensors respectively by three groups of collection of simulant signal channels, obtains three groups
Voltage sampling signal, wherein three Hall current sensors are used to be respectively induced the three-phase current of electric machine controller output, output
Voltage signal.
Further, the output for acquiring three Hall current sensors respectively by three groups of collection of simulant signal channels, is obtained
Taking three groups of voltage sampling signals includes: to select respectively in every group of collection of simulant signal channel in three groups of collection of simulant signal channels
A collection of simulant signal channel is taken, three collection of simulant signal channels are obtained；By three collection of simulant signal channels according to
First preset order acquires the output of three Hall current sensors respectively, obtains the first preset order voltage sampling signal；With
And acquire the output of three Hall current sensors respectively according to the second preset order by three collection of simulant signal channels, it obtains
Take the second preset order voltage sampling signal.
Further, acquiring the output of sensor by multichannel analog signals acquisition channel includes: within PWM interrupt cycle
Default sampling instant start to acquire the output of sensor, wherein when default sampling instant is following in PWM interrupt cycle
It carves:Wherein, T is the duration of PWM interrupt cycle, and t is by obtaining multiple sampled signals to the duration for obtaining phase current.
Further, sensor is Hall current sensor, acquires sensor by multichannel analog signals acquisition channel
Output, obtaining multiple sampled signals includes: to be carried out by the first collection of simulant signal channel to the output of Hall current sensor
It acquires twice, obtains first voltage sampled signal and second voltage sampled signal；And pass through the second collection of simulant signal channel
The output of Hall current sensor is acquired twice, obtains tertiary voltage sampled signal and the 4th voltage sampling signal, root
It include: to first voltage sampled signal, second voltage sampled signal, the according to the sampled result that multiple sampled signals obtain phase current
Three voltage sampling signals and the 4th voltage sampling signal are ranked up；Remove first voltage sampled signal, second voltage sampling letter
Number, maximum value and minimum value in tertiary voltage sampled signal and the 4th voltage sampling signal, obtain two voltage sampling signals
Median；Two voltage sampling signal medians are averaged, voltage sampling signal average value is obtained；And by voltage sample
Signal averaging is converted to current value, obtains the sampled result of phase current.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of phase current signal sampling apparatus.It should
Device includes: sensor, is sleeved on the output cable of electric machine controller, for Control of Induction Motors device output phase current,
Export sampled signal；Sampling A/D chip is connected by multichannel analog signals acquisition channel with the output of sensor, is passed for acquiring
The output of sensor simultaneously obtains multiple sampled signals；And control chip, it is connected with sampling A/D chip, for being believed according to multiple samplings
Number obtain phase current sampled result.
Further, sensor is Hall current sensor.
Further, the output cable of electric machine controller includes the first phase current cable, the second phase current cable and third
Phase current cable, multichannel analog signals acquisition channel include first group of collection of simulant signal channel, second group of collection of simulant signal
Channel and third group collection of simulant signal channel, Hall current sensor includes: the first Hall current sensor, is sleeved on first
On phase current cable, it is connected by first group of collection of simulant signal channel with control chip, it is defeated for Control of Induction Motors device
The first phase current out exports first voltage signal；Second Hall current sensor is sleeved on the second phase current cable, is led to
Cross second group of collection of simulant signal channel with control chip be connected, for Control of Induction Motors device output the second phase current,
Export second voltage signal；And third Hall current sensor, it is sleeved in third phase current cable, is simulated by third group
Signal sampling channel is connected with control chip, for the third phase current of Control of Induction Motors device output, exports tertiary voltage
Signal.
Further, sampling A/D chip includes: multiple collection of simulant signal interfaces, by multichannel analog signals acquisition channel with
The output of sensor is connected, for acquiring the sampled signal of sensor output, wherein multiple collection of simulant signal interfaces and more
Road collection of simulant signal channel corresponds.
Further, sensor is Hall current sensor, for incuding phase current output voltage signal, multi-channel analog letter
Number acquisition channel includes first via collection of simulant signal channel and the second road collection of simulant signal channel, multiple collection of simulant signal
Interface includes: the first collection of simulant signal interface, passes through the defeated of first via collection of simulant signal channel and Hall current sensor
It is connected out, the voltage signal for acquiring Hall current sensor output obtains first voltage sampled signal；And second mould
Quasi- signal acquisition interface, is connected, for adopting with the output of Hall current sensor by the second road collection of simulant signal channel
The voltage signal for collecting Hall current sensor output obtains second voltage sampled signal.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of electric machine controller.The motor control
Device includes: sampling A/D chip, is connected by multichannel analog signals acquisition channel with the output of sensor, for acquiring sensor
It exports and obtains multiple sampled signals, wherein sensor is used for the phase current of Control of Induction Motors device output and exports sampling letter
Number；And control chip, it is connected with sampling A/D chip, for obtaining the sampled result of phase current according to multiple sampled signals.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of electric car.The electric car packet
Include phase current signal sampling apparatus or electric machine controller of the invention.
The present invention acquires the output of sensor by multichannel analog signals acquisition channel, obtains multiple sampled signals, wherein
Sensor is used for the phase current of Control of Induction Motors device output, exports sampled signal；And phase is obtained according to multiple sampled signals
The sampled result of electric current solves the problems, such as that phase current signal sampling precision is lower in the related technology, and then has reached raising phase
The effect of current signal sampling precision.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the phase current signal method of sampling according to a first embodiment of the present invention；
Fig. 2 is the schematic diagram of the sampling instant of the phase current signal method of sampling according to an embodiment of the present invention；
Fig. 3 is the flow chart of the phase current signal method of sampling according to a second embodiment of the present invention；
Fig. 4 is showing for the phase current signal sampling apparatus that the phase current signal method of sampling according to an embodiment of the present invention uses
It is intended to；And
Fig. 5 is the schematic diagram of phase current signal sampling apparatus according to an embodiment of the present invention.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
The embodiment provides a kind of phase current signal method of samplings.
Fig. 1 is the flow chart of the phase current signal method of sampling according to a first embodiment of the present invention.As shown in Figure 1, the party
Method the following steps are included:
Step S101 is acquired the output of sensor by multichannel analog signals acquisition channel, obtains multiple sampled signals.
Collection of simulant signal channel is used to acquire the analog signal of sensor output, obtains digital signal.Analog signal is adopted
Collection channel can be the Sampling Interface of sampling A/D chip and sensor carries out line connection, the signal of acquisition sensor output, and acquisition is adopted
Sample signal.Sensor is used for the phase current of Control of Induction Motors device output, exports sampled signal.Sensor can be sleeved on motor
On the output cable of controller, electric machine controller exports the operation of three-phase current driving motor, by taking the motor of star-like connection as an example, phase
Electric current is equal to line current, and sensor can be directly sleeved on the line current cable of electric machine controller, and induction phase current output is adopted
Sample signal.Sensor can be electric current conversion potential circuit, phase current is converted to voltage signal output, it is preferable that sensor
Hall current sensor can be used, phase current signal, the output voltage signal after electromagnetic conversion are incuded.One sensor pair
A phase current is answered, the output of a sensor is acquired by multichannel analog signals acquisition channel, sample number can be improved.It is more
Road collection of simulant signal channel acquires the available multiple sampled signals of output of sensor, the quantity of multiple sampled signals and more
The quantity in road collection of simulant signal channel is related with the number being acquired using multichannel analog signals acquisition channel to sensor,
For example, using the output of two-way collection of simulant signal channel acquisition sensor, per collection of simulant signal channel all the way to sensor
Output acquired twice, then four sampled signals can be got to the phase current of sensor sensing.
Step S102 obtains the sampled result of phase current according to multiple sampled signals.
After obtaining multiple sampled signals, the sampled result of phase current is obtained according to multiple sampled signals.According to multiple
The sampled result that sampled signal obtains phase current includes calculating multiple sampled signals, obtains the sampled result of phase current.
The method calculated multiple sampled signals can be the common method that data processing is carried out to experimental data, be also possible to pre-
First determining processing method.Specifically, if being more than three to the quantity of multiple sampled signals of phase current acquisition, it can
To be first ranked up collected multiple sampled signals, remove the maximum value and minimum value in multiple sampled signals, it will be more
Remaining sampled signal is averaged in a sampled signal, obtains sampled signal average value.The sampled signal can be electric current letter
Number, it is also possible to voltage signal, if it is voltage signal, then needs voltage sampling signal average value being converted to current value, obtain
Get the sampled result of final phase current.Phase current signal is in sampling vulnerable to the biggish power device switching tube of switching frequency
Influence, the fluctuation of waveform may be generated, by acquiring multiple sampled signals to same phase current, and remove multiple samplings
Maximum value and minimum value in signal can effectively remove interference.Optionally, phase current is obtained according to multiple sampled signals
Sampled result, which can also be, is directly averaged multiple sampled signals, obtains sampled signal average value, if sampled signal is not
It is current value, then sampled signal average value is converted into current value, obtains the sampled result of phase current.The present invention does not limit to more
The specific algorithm that a sampled signal is calculated, as the case may be depending on.
Preferably, by the output that multichannel analog signals acquisition channel acquires sensor be within PWM interrupt cycle, can be with
First determine that the sampling instant of acquisition sensor, the sampling instant within PWM interrupt cycle start to acquire the output of sensor.
Sampling instant, which can be, to be calculated by the following formula:
Wherein, T is the duration of PWM interrupt cycle, t be by obtain multiple sampled signals to acquisition phase current duration,
That is, t is to the total duration according to predetermined sampling operation calculated signal sampling and data processing, t can be by executing
The working unit time of the chip of sampling and data processing operation determines.
Fig. 2 is the schematic diagram of the sampling instant of the phase current signal method of sampling according to an embodiment of the present invention, such as Fig. 2 institute
Show, the when a length of Tpwm of PWM interrupt cycle, note center point moment is t2, and the t2 moment is Tpwm/2, when the t1 moment is as sampling
It carves, starts the acquisition and conversion operation that trigger phase current signal at the t1 moment, the acquisition of phase current signal and conversion operation are by electricity
The main control chip of machine controller executes, and electric machine controller main control chip carries out primary simulation letter to collection of simulant signal channel all the way
Number acquisition and time for convert into ts, in predetermined sampling operation include six analog signal sampling channel is respectively acquired with
Conversion is then about 12*ts by the duration for obtaining multiple sampled signals to the sampled result for obtaining phase current, it can thus be concluded that t1 twice
Moment is (t2-6*ts), and the t1 moment before the center point moment t2 of PWM interrupt cycle, obtains the sampled result of phase current
Moment, the t3 moment was (t2+6*ts) at the t3 moment.Near the central instant of PWM interrupt cycle, power device switching tube is to phase
The influence of current waveform is smaller, and phase current is more stable, by determining the sampling instant near PWM central point interrupt cycle,
And start to carry out the acquisition and conversion of phase current signal in sampling instant, power device switching tube can be avoided to phase current waveform
Influence, collected phase current values are more acurrate.
Preferably, the three-phase current of electric machine controller output is respectively induced by three Hall current sensors, each suddenly
The corresponding phase current of your current sensor.Multichannel analog signals acquisition channel include three groups of collection of simulant signal channels, every group
Collection of simulant signal channel includes multichannel analog signals acquisition channel, one Hall of every group of corresponding acquisition in collection of simulant signal channel
The output of current sensor, that is, every group of collection of simulant signal channel collects multiple voltage samples letter an of phase current
Number, multiple voltage sampling signals are carried out with the sampled result that the phase current is calculated.Preferably, preset order pair can be passed through
Three-phase current is sampled, specifically, dividing in every group of collection of simulant signal channel in three groups of collection of simulant signal channels
Collection of simulant signal channel all the way is not chosen, obtains three road collection of simulant signal channels, passes through three road collection of simulant signal channels
It acquires the output of three Hall current sensors respectively according to the first preset order, obtains the first preset order voltage sample letter
Number, then the defeated of three Hall current sensors is acquired respectively according to the second preset order by three road collection of simulant signal channels
Out, the second preset order voltage sampling signal is obtained.For example, every group of analog signal is adopted in three groups of collection of simulant signal channels
Collection channel respectively includes two-way collection of simulant signal channel, chooses two-way collection of simulant signal in every group of collection of simulant signal channel
One of channel obtains the tri- road collection of simulant signal channel A, B, C, passes for tri- Hall currents of acquisition A, B, C respectively
The output of sensor, namely three-phase current is acquired respectively, when being sampled within PWM interrupt cycle, tri- tunnel analog signal of A, B, C is adopted
Collection channel sequentially acquires, and is sequentially collection of simulant signal channel A, collection of simulant signal channel B, collection of simulant signal channel
C respectively acquires once the output of tri- Hall current sensors of A, B, C, obtains the voltage sample of the three-phase current of the first sequence
Then signal is distinguished sequenced through collection of simulant signal channel C, collection of simulant signal channel B, collection of simulant signal channel A again
It is primary to the output acquisition of tri- Hall current sensors of C, B, A, obtain the voltage sampling signal of the three-phase current of the second sequence.
After obtaining voltage sampling signal, multiple voltage sampling signals corresponding to each phase current are calculated, and obtain each phase electricity
The sampled result of stream.When being sampled within PWM interrupt cycle, due to the interference effect by power device, different moments phase
The waveform of electric current may be different, and the value of three-phase current is acquired by order change, can disperse power device to a certain extent
The influence that the interference of part generates same phase current, multiple sampled signals collected to same phase current can more reflect overall feelings
Condition.
The phase current signal method of sampling that the embodiment provides acquires sensor by multichannel analog signals acquisition channel
Output, obtains multiple sampled signals, wherein sensor is used for the phase current of Control of Induction Motors device output, exports sampled signal；
And according to multiple sampled signals obtain phase current sampled result, solve in the related technology phase current signal sampling precision compared with
Low problem, and then achieved the effect that improve phase current signal sampling precision.
Fig. 3 is the flow chart of the phase current signal method of sampling according to a second embodiment of the present invention.The embodiment can be made
For the preferred embodiment of above-mentioned first embodiment.
Fig. 4 is showing for the phase current signal sampling apparatus that the phase current signal method of sampling according to an embodiment of the present invention uses
It is intended to.The phase current signal that phase current signal sampling apparatus can be used for executing second embodiment of the invention shown in Fig. 4 is adopted
Quadrat method.As shown in figure 4, phase current signal sampling apparatus includes electric machine controller 401, and motor 402, Hall current sensor A,
Hall current sensor B and Hall current sensor C.
Electric machine controller 401 includes collection of simulant signal interface AD0, collection of simulant signal interface AD1, collection of simulant signal
Interface AD2, collection of simulant signal interface AD3, collection of simulant signal interface AD4, collection of simulant signal interface AD5, phase current U are defeated
Outgoing interface, phase current V output interface, phase current W output interface.Electric machine controller 401 passes through line cable for three-phase current U, V, W
It is output to motor 402, is used for driving motor 402.Hall current sensor A, Hall current sensor B, Hall current sensor C
It is set on the corresponding line cable of three-phase current U, V, W, the phase current signal for being respectively induced three-phase current U, V, W is defeated
Voltage signal out.AD0 and AD1 is acquired the output of Hall current sensor A, and AD2 and AD3 are to Hall current sensor B
Output be acquired, AD4 and AD5 are acquired the output of Hall current sensor C.
As shown in figure 3, the phase current signal method of sampling of the embodiment the following steps are included:
Step S301, sequentially through collection of simulant signal interface AD0, AD2, AD4 respectively to Hall current sensor A,
B, the output of C is acquired, and obtains three-phase current corresponding voltage sampling signal U1, V1, W1.
Step S302, sequentially through collection of simulant signal interface AD4, AD2, AD0 respectively to Hall current sensor C,
B, the output of A is acquired, and obtains three-phase current corresponding voltage sampling signal W2, V2, U2.
Step S303, sequentially through collection of simulant signal interface AD1, AD3, AD5 respectively to Hall current sensor A,
B, the output of C is acquired, and obtains three-phase current corresponding voltage sampling signal U3, V3, W3.
Step S304, sequentially through collection of simulant signal interface AD5, AD3, AD1 respectively to Hall current sensor C,
B, the output of A is acquired, and obtains three-phase current corresponding voltage sampling signal W4, V4, U4.
Step S305 is ranked up the sampled signal of each phase current.The sampled signal of U phase current be U1, U2, U3, U4,
The sampled signal of V phase current is V1, V2, V3, V4, and the sampled signal of W phase current is W1, W2, W3, W4.Each phase current is adopted respectively
Four sampled signals are collected, four sampled signals of each phase current have been ranked up.
Step S306, after the sampled signal to each phase current is ranked up, in the sampled signal of removing each phase current
Maximum value and minimum value.Removing maximum value and minimum value can remove and be disturbed more serious sampled signal, and reduction is disturbed
Influence of the serious sampled signal to sampled result.
Step S307, the sampled signal retained each phase current are averaged, and the sampled signal for obtaining each phase current is average
Value.
The sampled signal average value of each phase current is converted to current value, obtains the sampling knot of each phase current by step S308
Fruit.Sampled result can be used for motor control.
It should be noted that step shown in the flowchart of the accompanying drawings can be in such as a group of computer-executable instructions
It is executed in computer system, although also, logical order is shown in flow charts, and it in some cases, can be with not
The sequence being same as herein executes shown or described step.
The embodiments of the present invention also provide a kind of phase current signal sampling apparatuses.It should be noted that the present invention is implemented
The phase current signal sampling apparatus of example can be used for executing the phase current signal method of sampling of the invention.
Fig. 5 is the schematic diagram of phase current signal sampling apparatus according to an embodiment of the present invention.As shown in figure 5, the device packet
Include sensor 10, sampling A/D chip 20 and control chip 30.
Sensor 10 is sleeved on the output cable of electric machine controller, for Control of Induction Motors device output phase current,
Export sampled signal.Sampling A/D chip 20 is connected by multichannel analog signals acquisition channel with the output of sensor 10, for adopting
Collect the output of sensor 10 and obtains multiple sampled signals.Control chip 30 is connected with sampling A/D chip 20, for according to multiple
The sampled result of sampled signal acquisition phase current.
Preferably, sensor 10 is Hall current sensor.
Preferably, the output cable of electric machine controller includes the first phase current cable, the second phase current cable and third phase
Current cable, multichannel analog signals acquisition channel are logical including first group of collection of simulant signal channel, second group of collection of simulant signal
Road and third group collection of simulant signal channel, Hall current sensor include three Hall current sensors, wherein the first Hall
Current sensor is sleeved on the first phase current cable, is connected by first group of collection of simulant signal channel with control chip,
For the first phase current of Control of Induction Motors device output, first voltage signal is exported；Second Hall current sensor is sleeved on
On second phase current cable, it is connected by second group of collection of simulant signal channel with control chip, is used for Control of Induction Motors
Second phase current of device output, exports second voltage signal；Third Hall current sensor is sleeved in third phase current cable,
It is connected by third group collection of simulant signal channel with control chip, the third phase electricity for the output of Control of Induction Motors device
Stream exports tertiary voltage signal.
Preferably, sampling A/D chip 20 include multiple collection of simulant signal interfaces, by multichannel analog signals acquisition channel with
The output of sensor is connected, for acquiring the sampled signal of sensor output, wherein multiple collection of simulant signal interfaces and more
Road collection of simulant signal channel corresponds.
Preferably, sensor 10 is Hall current sensor, for incuding phase current output voltage signal, multi-channel analog letter
Number acquisition channel includes first via collection of simulant signal channel and the second road collection of simulant signal channel, multiple collection of simulant signal
Interface includes the first collection of simulant signal interface and the second collection of simulant signal interface.First collection of simulant signal interface passes through the
Collection of simulant signal channel is connected with the output of Hall current sensor all the way, for acquiring Hall current sensor output
Voltage signal obtains first voltage sampled signal.Second collection of simulant signal interface by the second road collection of simulant signal channel with
The output of Hall current sensor is connected, and the voltage signal for acquiring Hall current sensor output obtains second voltage and adopts
Sample signal.
The embodiments of the present invention also provide a kind of electric machine controllers.The electric machine controller includes sampling A/D chip and control core
Piece.Sampling A/D chip is connected by multichannel analog signals acquisition channel with the output of sensor, for acquiring the output of sensor
And obtain multiple sampled signals, wherein sensor is used for the phase current of Control of Induction Motors device output and exports sampled signal.Control
Coremaking piece is connected with sampling A/D chip, for obtaining the sampled result of phase current according to multiple sampled signals.
The embodiments of the present invention also provide a kind of electric cars.The electric car includes the phase current of the embodiment of the present invention
Signal sampling device or electric machine controller.
Obviously, those skilled in the art should be understood that each module of the above invention or each step can be with general
Computing device realize that they can be concentrated on a single computing device, or be distributed in multiple computing devices and formed
Network on, optionally, they can be realized with the program code that computing device can perform, it is thus possible to which they are stored
Be performed by computing device in the storage device, perhaps they are fabricated to each integrated circuit modules or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.In this way, the present invention is not limited to any specific
Hardware and software combines.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of phase current signal method of sampling characterized by comprising
The output that sensor is acquired by multichannel analog signals acquisition channel, obtains multiple sampled signals, wherein the sensor
For the phase current of Control of Induction Motors device output, sampled signal is exported；And
The sampled result of the phase current is obtained according to the multiple sampled signal；
Wherein, acquiring the channel to acquire the output of sensor by the multichannel analog signals includes: within PWM interrupt cycle
Default sampling instant start to acquire the output of the sensor, wherein the default sampling instant be the PWM interrupt cycle
The interior following moment:Wherein, T is the duration of the PWM interrupt cycle, t be by obtain the multiple sampled signal to
Obtain the duration of the phase current.
2. the method according to claim 1, wherein the sensor is Hall current sensor, for incuding
The phase current of the electric machine controller output, output voltage signal,
The output of sensor is acquired by multichannel analog signals acquisition channel, obtaining multiple sampled signals includes: by described more
Road collection of simulant signal channel acquires the output of the Hall current sensor, obtains multiple voltage sampling signals,
According to the sampled result that the multiple sampled signal obtains the phase current include: to the multiple voltage sampling signal into
Row calculates, and obtains the sampled result of the phase current.
3. the phase is electric the method according to claim 1, wherein the sensor is Hall current sensor
Stream is three-phase current, and the multichannel analog signals acquisition channel includes three groups of collection of simulant signal channels, is believed by multi-channel analog
The output of number acquisition channel acquisition sensor, obtaining multiple sampled signals includes:
It acquires the output of three Hall current sensors respectively by three groups of collection of simulant signal channels, obtains three groups of voltages
Sampled signal, wherein three Hall current sensors are used to be respectively induced the three-phase of the electric machine controller output
Electric current, output voltage signal.
4. according to the method described in claim 3, it is characterized in that, being acquired respectively by three groups of collection of simulant signal channels
The output of three Hall current sensors, obtaining three groups of voltage sampling signals includes:
An analog signal is chosen respectively in every group of collection of simulant signal channel in three groups of collection of simulant signal channels
Acquisition channel obtains three collection of simulant signal channels；
Three Hall currents are acquired respectively according to the first preset order by three collection of simulant signal channels to sense
The output of device obtains the first preset order voltage sampling signal；And
Three Hall currents are acquired respectively according to the second preset order by three collection of simulant signal channels to sense
The output of device obtains the second preset order voltage sampling signal.
5. the method according to claim 1, wherein the sensor be Hall current sensor,
The output of sensor is acquired by multichannel analog signals acquisition channel, obtaining multiple sampled signals includes: by the first mould
Quasi- signal sampling channel acquires the output of the Hall current sensor twice, acquisition first voltage sampled signal and the
Two voltage sampling signals；And the output of the Hall current sensor is carried out twice by the second collection of simulant signal channel
Acquisition obtains tertiary voltage sampled signal and the 4th voltage sampling signal,
According to the sampled result that the multiple sampled signal obtains the phase current include: to the first voltage sampled signal,
The second voltage sampled signal, the tertiary voltage sampled signal and the 4th voltage sampling signal are ranked up；Remove
The first voltage sampled signal, the second voltage sampled signal, the tertiary voltage sampled signal and the 4th voltage
Maximum value and minimum value in sampled signal obtain two voltage sampling signal medians；To described two voltage sampling signals
Median is averaged, and obtains voltage sampling signal average value；And the voltage sampling signal average value is converted into electric current
Value, obtains the sampled result of the phase current.
6. a kind of phase current signal sampling apparatus characterized by comprising
Sensor is sleeved on the output cable of electric machine controller, defeated for incuding the phase current of the electric machine controller output
Sampled signal out；
Sampling A/D chip is connected, for acquiring the biography with the output of the sensor by multichannel analog signals acquisition channel
The output of sensor simultaneously obtains multiple sampled signals；And
Chip is controlled, is connected with the sampling A/D chip, for obtaining adopting for the phase current according to the multiple sampled signal
Sample result；
Wherein, the sampling A/D chip is also used to the default sampling instant within PWM interrupt cycle and starts to acquire the sensor
Output, wherein the default sampling instant is the following moment in the PWM interrupt cycle:Wherein, T is the PWM
The duration of interrupt cycle, t are by obtaining the multiple sampled signal to the duration for obtaining the phase current.
7. device according to claim 6, which is characterized in that the sensor is Hall current sensor.
8. device according to claim 7, which is characterized in that the output cable of the electric machine controller includes the first phase electricity
Galvanic electricity cable, the second phase current cable and third phase current cable, the multichannel analog signals acquisition channel include first group of simulation
Signal sampling channel, second group of collection of simulant signal channel and third group collection of simulant signal channel, the Hall current sensing
Device includes:
First Hall current sensor is sleeved on the first phase current cable, passes through first group of collection of simulant signal
Channel is connected with the control chip, for incuding the first phase current of the electric machine controller output, exports first voltage
Signal；
Second Hall current sensor is sleeved on the second phase current cable, passes through second group of collection of simulant signal
Channel is connected with the control chip, for incuding the second phase current of the electric machine controller output, exports second voltage
Signal；And
Third Hall current sensor is sleeved in the third phase current cable, passes through the third group collection of simulant signal
Channel is connected with the control chip, for incuding the third phase current of the electric machine controller output, exports tertiary voltage
Signal.
9. device according to claim 6, which is characterized in that the sampling A/D chip includes:
Multiple collection of simulant signal interfaces are connected by the multichannel analog signals acquisition channel with the output of the sensor
It connects, for acquiring the sampled signal of the sensor output, wherein the multiple collection of simulant signal interface and the multichannel mould
Quasi- signal sampling channel corresponds.
10. device according to claim 9, which is characterized in that the sensor is Hall current sensor, for incuding
The phase current output voltage signal, the multichannel analog signals acquisition channel include first via collection of simulant signal channel and
Two roads collection of simulant signal channel, the multiple collection of simulant signal interface include:
First collection of simulant signal interface passes through first via collection of simulant signal channel and the Hall current sensor
Output is connected, and the voltage signal for acquiring the Hall current sensor output obtains first voltage sampled signal；And
Second collection of simulant signal interface passes through the second road collection of simulant signal channel and the Hall current sensor
Output is connected, and the voltage signal for acquiring the Hall current sensor output obtains second voltage sampled signal.
11. a kind of electric machine controller characterized by comprising
Sampling A/D chip is connected, for acquiring the sensor with the output of sensor by multichannel analog signals acquisition channel
Output and obtain multiple sampled signals, wherein the sensor is used to incude the phase current of electric machine controller output simultaneously
Export sampled signal；And
Chip is controlled, is connected with the sampling A/D chip, for obtaining adopting for the phase current according to the multiple sampled signal
Sample result；
Wherein, the sampling A/D chip is also used to the default sampling instant within PWM interrupt cycle and starts to acquire the sensor
Output, wherein the default sampling instant is the following moment in the PWM interrupt cycle:Wherein, T is the PWM
The duration of interrupt cycle, t are by obtaining the multiple sampled signal to the duration for obtaining the phase current.
12. a kind of electric car, which is characterized in that sampled including phase current signal described in any one of claim 6 to 10
Electric machine controller described in device or claim 11.
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| CN201510997315.2A CN105548657B (en) | 2015-12-25 | 2015-12-25 | The phase current signal method of sampling and device, electric machine controller and electric car |
| PCT/CN2016/103205 WO2017107645A1 (en) | 2015-12-25 | 2016-10-25 | Phase current signal sampling method and apparatus, electric motor controller and electric vehicle |
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| CN105548657B (en) * | 2015-12-25 | 2019-02-26 | 北京新能源汽车股份有限公司 | The phase current signal method of sampling and device, electric machine controller and electric car |
| CN106546809B (en) * | 2016-12-06 | 2019-09-13 | 深圳拓邦股份有限公司 | It is a kind of based on without filtering phase current sampling circuit control method and device |
| CN107561340A (en) * | 2017-07-27 | 2018-01-09 | 中国船舶重工集团公司第七二四研究所 | A kind of wide temperature drift of AC servo driver electric current is moved from correcting detection method |
| CN109752652B (en) * | 2017-11-07 | 2021-02-02 | 上海大郡动力控制技术有限公司 | Phase current sampling method for permanent magnet synchronous motor |
| CN111308170B (en) * | 2018-12-12 | 2022-11-08 | 浙江盾安人工环境股份有限公司 | Motor phase current sampling method and device |
| CN111796134B (en) * | 2019-04-08 | 2023-03-14 | 深圳市瑞能实业股份有限公司 | Current sampling failure judgment method and device for multiphase circuit |
| CN110780107B (en) * | 2019-11-29 | 2022-03-22 | 杭州富阳中恒电气有限公司 | Current sampling control method and device for three-phase converter, electronic equipment and medium |
| CN111123774B (en) * | 2019-12-19 | 2021-09-07 | 上海宇航系统工程研究所 | Motor current acquisition method and system applied to deep space detection antenna servo controller |
| CN111426868B (en) * | 2020-04-23 | 2022-03-29 | 合肥巨一动力系统有限公司 | Controller current sampling system |
| CN111654217B (en) * | 2020-06-01 | 2023-09-22 | 河北建投能源科学技术研究院有限公司 | Active power control method for asynchronous generator set of heat supply network head station based on current control |
| CN112540211A (en) * | 2020-12-04 | 2021-03-23 | 上海辛格林纳新时达电机有限公司 | Current checking method and system, upper computer and storage medium |
| CN114977965B (en) * | 2022-06-29 | 2023-11-17 | 广东高标智能科技股份有限公司 | Electric vehicle phase current calculation method and electric vehicle |
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