CN108258955A - Adjuster, vehicle alternator and its Rotating speed measring method - Google Patents
Adjuster, vehicle alternator and its Rotating speed measring method Download PDFInfo
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- CN108258955A CN108258955A CN201611238643.5A CN201611238643A CN108258955A CN 108258955 A CN108258955 A CN 108258955A CN 201611238643 A CN201611238643 A CN 201611238643A CN 108258955 A CN108258955 A CN 108258955A
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- 238000001514 detection method Methods 0.000 claims abstract description 51
- 238000001228 spectrum Methods 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 230000005389 magnetism Effects 0.000 abstract description 13
- 230000005611 electricity Effects 0.000 description 9
- 239000008186 active pharmaceutical agent Substances 0.000 description 8
- 230000005284 excitation Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
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- 230000002964 excitative effect Effects 0.000 description 1
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Classifications
-
- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/02—Details of the control
-
- 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
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/08—Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
-
- 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
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/45—Special adaptation of control arrangements for generators for motor vehicles, e.g. car alternators
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides a kind of adjuster, vehicle alternator and its Rotating speed measring method.Vehicle alternator includes rotor coil, stator coil portion, rectifier circuit and adjuster.Adjuster controls the electric current for flowing through rotor coil.Rotor coil and stator coil portion Collaboration are to convert mechanical energy into AC energy.AC energy from stator coil portion is converted to direct current energy by rectifier circuit.When vehicle alternator carries out the running of self-excitation magnetic starting with residual magnetism, the frequency of the rotor voltage signal of adjuster detection rotor coil, using the foundation as the rotating speed for calculating vehicle alternator.The present invention, by the amplitude and frequency of the induced voltage signal for detecting rotor coil end, can correctly calculate the rotating speed of vehicle alternator when vehicle alternator carries out self-excitation magnetic starting with residual magnetism.
Description
Technical field
The present invention relates to a kind of generator circuit, and more particularly to a kind of adjuster of vehicle alternator, automobile-used friendship
Flow generator and its Rotating speed measring method.
Background technology
Known vehicle alternator is made of rotor (rotor) coil and stator (stator) coil.Normal
Running under, when excitation current passes through rotor coil, rotor coil can provide magnetic field to stator coil.When the internal combustion of automobile
When engine drives rotor coil rotation, this rotor coil can generate rotating excitation field so that stator coil generates AC energy.Vehicle
The AC energy from stator coil is subjected to the rectifier of alternating current generator, direct current energy is generated after giving rectification.This is straight
Galvanic electricity can charge to accumulator or supply electricity to load.This accumulator can also be via the adjusting in vehicle alternator
Device provides excitation current to rotor coil.
In general, existing adjuster is the amplitude and frequency for the induced voltage signal for detecting stator coil end, with
Calculate the correct rotating speed of vehicle alternator.In addition, when vehicle alternator is opened by stationary state (i.e. shutdown status)
When dynamic, rotor coil has no current flowing, rotor coil need to by remain in its magnetic core (rotor core) residual magnetism (or
Remanent magnetism, residual magnetism) magnetic field is established, vehicle alternator to be allowed to carry out self-excitation magnetic starting (auto
start).Specifically, when vehicle alternator carries out the running of self-excitation magnetic starting with residual magnetism, rotor coil is by mechanical energy
Rotation, the residual magnetism in rotor coil magnetic core can interlink stator coil, so that stator coil generates induced voltage signal.Due to rotor
Residual magnetism in wound core is usually all very faint, therefore induced voltage signal caused by stator coil is also very faint, if this
The amplitude of induced voltage signal is less than critical voltage value, then adjuster will be unable to detect the frequency of this induced voltage signal, when
It so can not also calculate the rotating speed of vehicle alternator.
In addition to this, the faint induced voltage signal of stator coil is also easily because of the leaky of the diode of rectifier
And Potential movement or signal is caused to be decayed so that adjuster be not easy to detect the amplitude of the induced voltage signal of stator coil end and
Frequency so as to which increase obtains the degree of difficulty of the rotating speed of vehicle alternator, and leads to being opened from excitatory for vehicle alternator
Dynamic function is bad.
Invention content
In view of this, the present invention provides a kind of adjuster of vehicle alternator, vehicle alternator and its rotating speed
Detection method, can be when vehicle alternator carries out self-excitation magnetic starting with residual magnetism, by the induced electricity for detecting rotor coil end
The amplitude and frequency of signal are pressed, correctly to calculate the rotating speed of vehicle alternator.
The adjuster of the present invention includes control circuit and detection circuit.Control circuit is coupled to turning for vehicle alternator
Subcoil flows through the electric current of rotor coil with control.Detection circuit is coupled to rotor coil to receive the rotor of rotor coil electricity
Press signal.When vehicle alternator carries out the running of self-excitation magnetic starting, detection circuit detects the frequency of rotor voltage signal, with
Foundation as the rotating speed for calculating vehicle alternator.
In one embodiment of this invention, above-mentioned detection circuit is further coupled to the stator coil portion of vehicle alternator
Node between rectifier circuit, to receive the stator voltage sig in stator coil portion.When above-mentioned vehicle alternator is complete
After being operated into self-excitation magnetic starting, detection circuit is changed to the frequency of detection stator voltage sig, using as calculating automobile-used exchange
The foundation of the rotating speed of generator.
The vehicle alternator of the present invention includes rotor coil and adjuster.Adjuster includes control circuit and detection electricity
Road.Control circuit is coupled to rotor coil, and the electric current of rotor coil is flowed through with control.Detection circuit is coupled to rotor coil to connect
Receive the rotor voltage signal of rotor coil.When vehicle alternator carries out the running of self-excitation magnetic starting, detection circuit detection turns
The frequency of sub- voltage signal, using the foundation as the rotating speed for calculating vehicle alternator.
The Rotating speed measring method of the vehicle alternator of the present invention includes the following steps.Judging vehicle alternator is
No progress self-excitation magnetic starting running.If judging, vehicle alternator carries out self-excitation magnetic starting running, is detected by adjuster
The frequency of the rotor voltage signal of rotor coil, using the foundation as the rotating speed for calculating vehicle alternator.
Based on above-mentioned, in adjuster, vehicle alternator and its Rotating speed measring method that the embodiment of the present invention is proposed
In, it can be when vehicle alternator carries out self-excitation magnetic starting with residual magnetism, by the rotor voltage signal for detecting rotor coil
Amplitude and frequency, using the foundation as the rotating speed for calculating vehicle alternator.Since rotor voltage signal has no potential shift
The phenomenon that, and will not be influenced by rectifier circuit electric leakage or load effect, therefore the frequency of rotor voltage signal is easy to examine
It surveys.Thus, in addition to can correctly calculate the rotating speed of vehicle alternator to promote the performance of self-excitation magnetic starting, moreover it is possible to
Simplify the circuit complexity of adjuster.
To make the foregoing features and advantages of the present invention clearer and more comprehensible, special embodiment below, and attached drawing shown in cooperation
It is described in detail below.
Description of the drawings
Following shown attached drawing is the part of specification of the present invention, it is shown that example embodiments of the present invention, it is shown
Attached drawing illustrates the principle of the present invention together with the description of specification.
Fig. 1 is the circuit box schematic diagram according to the vehicle alternator shown by one embodiment of the invention；
Fig. 2 is the exemplary circuit schematic according to vehicle alternator shown in one embodiment of the invention definition graph 1；
Fig. 3 is the exemplary circuit schematic according to detection circuit shown in one embodiment of the invention definition graph 1；
Fig. 4 is the exemplary circuit schematic according to detection circuit shown in another embodiment of the present invention definition graph 1；
Fig. 5 be according to one embodiment of the invention definition graph 4 fast Fourier transform circuit by time-domain signal be converted to frequency
The schematic diagram of domain signal；
Fig. 6 is the step flow of the Rotating speed measring method according to the vehicle alternator shown by one embodiment of the invention
Figure.
Reference sign：
100：Vehicle alternator
110：Rotor coil
120：Stator coil portion
120U：U phase coils
120V：V phase coils
120W：W phase coils
123：Common node
130：Rectifier circuit
130U：U phases exchange end
130V：V phases exchange end
130W：W phases exchange end
140：Adjuster
141：Control circuit
142、142’：Detection circuit
20：Accumulator
231U：Diode in U phases
231V：Diode in V phases
231W：Diode in W phases
232U：Diode under U phases
232V：Diode under V phases
232W：Diode under W phases
242：Switch
243：Diode
244：Field controller
341：Input selection circuit
342：Resistor
343：Comparator
344：Low-pass filter
345：Frequency calculator
443：Fast Fourier transform circuit
444：Spectrum analyzer circuit
B+：Power end
CMPS：Comparison signal
DS：Detect signal
FS：Filtering signal
FQS：Frequency-region signal
GND：Ground terminal
PS：Stator voltage sig
S600、S610、S620、S630、S640：Step
SEL：Selection signal
SR：Rotor voltage signal
Vth：Critical voltage signal
Specific embodiment
In order to which present disclosure is allow to be easier to understand, spy can actually be according to this as the present invention for embodiment below
The example of implementation.In addition, all possible parts, component/component of identical label is used in drawings and the embodiments, is to represent phase
Same or like.
Fig. 1 is please referred to below, and Fig. 1 is the circuit according to the vehicle alternator 100 shown by one embodiment of the invention
Block schematic diagram.Vehicle alternator 100 may include rotor coil 110, stator coil portion 120, rectifier circuit 130 and adjust
Device 140 is saved, but not limited to this.Rotor coil 110 can convert mechanical energy into alternating current with 120 Collaboration of stator coil portion
Energy.Rectifier circuit 130 is coupled to stator coil portion 120, AC energy is converted to direct current energy.This direct current energy can
To be stored in accumulator 20, one or more load circuit (not shown)s can also be supplied electricity to.
Adjuster 140 may include control circuit 141 and detection circuit 142.Control circuit 141 is coupled to rotor coil 110,
The electric current of rotor coil 110 is flowed through with control.More specifically, when 100 normal operation of vehicle alternator, control electricity
Road 141 can receive the direct current energy from accumulator 20, and control the electric current of rotor coil 110 according to this.When electric current passes through rotor
During coil 110, rotor coil 110 can generate magnetic field.In addition, when mechanical energy drives rotor coil 110 to rotate, stator coil portion
120 can react on rotating excitation field caused by rotor coil 110 and generate AC energy to rectifier circuit 130 so that rectification
AC energy from stator coil portion 120 is converted to direct current energy by device circuit 130.
Detection circuit 142 is coupled to rotor coil 110, to receive generated rotor voltage when rotor coil 110 operates
Signal SR.In addition, detection circuit 142 is further coupled to the node between stator coil portion 120 and rectifier circuit 130, it is fixed to receive
Generated stator voltage sig PS when subcoil portion 120 operates.Specifically, when vehicle alternator 100 carries out self-excitation
Magnetic starting (auto start) operate when, detection circuit 142 can detect the frequency of rotor voltage signal SR, using as calculate it is automobile-used
The foundation of the rotating speed of alternating current generator 100.In addition, after vehicle alternator 100 completes the running of self-excitation magnetic starting, detection
Circuit 142 can detect the frequency of stator voltage sig PS, using the foundation as the rotating speed for calculating vehicle alternator 100.
Specifically, when vehicle alternator 100 carries out the running of self-excitation magnetic starting, control circuit 141 is forbidden energy shape
State, therefore rotor coil 110 has no current flowing.At this point, rotor coil 110 is driven to rotate by mechanical energy, rotor coil 110
Magnetic core residual magnetism can generate rotating excitation field with the stator coil portion 120 that interlinks, and stator coil portion 120 is caused to induce stator voltage sig
PS.In addition, during rotor coil 110 rotates, the magnetic resistance change rate in stator coil portion 120 can change 110 magnetic of rotor coil
The magnetic flux density of core, therefore rotor coil 110 can also induce rotor voltage signal SR.Since rotor coil 110 there is no electric current stream
It is logical, therefore rotor voltage signal SR caused by rotor coil 110 is to be with a fixed reference voltage level (such as 0 volt)
The string wave signal at center.In other words, the phenomenon that rotor voltage signal SR at this time has no potential shift, therefore compared to stator electricity
Signal PS is pressed, the frequency of rotor voltage signal SR is easy to detect.Therefore, automobile-used friendship is calculated with the frequency of rotor voltage signal SR
The foundation of the rotating speed of generator 100 is flowed, the circuit complexity of detection circuit 142 (or adjuster 140) can be simplified.In addition, i.e.
Make the stator voltage sig PS in stator coil portion 120 that signal attenuation or Potential movement occur due to the electric leakage of rectifier circuit 130,
Rotor voltage signal SR still remains stationary.That is, the frequency and amplitude of rotor voltage signal SR can't be by rectifications
Device circuit 130 leaks electricity or the influence of load effect, therefore can correctly calculate the rotating speed of vehicle alternator 100 according to this.
In addition, after vehicle alternator 100 completes the running of self-excitation magnetic starting, control circuit 141 will start to control
The electric current of rotor coil 110, therefore the amplitude of rotor voltage signal SR and frequency may be affected.Therefore detection circuit 142
The frequency of variable more detection stator voltage sig PS, using the foundation as the rotating speed for calculating vehicle alternator 100.
In one embodiment of this invention, the frequency fr of the frequency fs of stator voltage sig PS and rotor voltage signal SR
Shown in relationship such as formula (1), and the relationship such as formula of the frequency fs of stator voltage sig PS and the rotating speed N of vehicle alternator 100
(2) shown in, wherein the unit of the frequency fr of the frequency fs of stator voltage sig PS and rotor voltage signal SR are all hertz (Hz),
The unit of the rotating speed N of vehicle alternator 100 is rotating speed per minute (RPM), and P is the extremely right of vehicle alternator 100
The quantity of (pole pairs).
Fr=fs × P formulas (1)
N=60 × fs ÷ P formulas (2)
It is understood that only it is to be understood that vehicle alternator 100 extremely to quantity P, and detect stator voltage
The frequency fs of signal PS, you can the rotating speed N of vehicle alternator 100 is calculated according to formula (2).In addition, only it is to be understood that automobile-used
Alternating current generator 100 extremely to quantity P, and detect the frequency fr of rotor voltage signal SR, you can according to formula (1) and formula
(2) the rotating speed N of vehicle alternator 100 is calculated.
Fig. 2 is please referred to below, and Fig. 2 is the model according to vehicle alternator 100 shown in one embodiment of the invention definition graph 1
Example circuit diagram.In embodiment illustrated in fig. 2, the control circuit 141 in adjuster 140 includes switch 242, diode 243
And field controller 244.The first end of switch 242 is coupled to the first DC voltage output end (example of vehicle alternator 100
Such as power end B+), and the second end of switch 242 is coupled to the first end of rotor coil 110.The cathode of diode 243 is coupled to
The first end of rotor coil 110 and the second end of switch 242, and the second end phase of the anode of diode 243 and rotor coil 110
Couple and be coupled to the second DC voltage output end (such as ground terminal GND) of vehicle alternator 100.Field controller 244
The control terminal of switch 242 is coupled to, 242 conducting state is switched with corresponding control.The conducting state of switch 242 can determine to lead to
The magnitude of current of rotor coil 110 is crossed, and then adjusts AC energy caused by stator coil portion 120.The implementation of field controller 244
Details can be determined according to design requirement.Such as in some embodiments, it is known that field controller or other controllers can be with
A controller 244 is employed to achieve, therefore the details of operation of field controller 244 repeats no more.
In embodiment illustrated in fig. 2, stator coil portion 120 includes U phase coil 120U, V phase coil 120V and W phase coils
120W.The first end of U phase coils 120U is respectively electrically connected to common node 123 with second end and the U of rectifier circuit 130 intersects
Flow end 130U.The first end of V phase coils 120V is respectively electrically connected to the V of common node 123 and rectifier circuit 130 with second end
Mutually exchange end 130V.The first end of W phase coils 120W is respectively electrically connected to common node 123 and rectifier circuit with second end
130 W phases exchange end 130W.When the internal combustion engine (not shown) of automobile drives rotor coil 110 to rotate, rotor coil 110
Can rotating excitation field be generated according to the residual magnetism of its magnetic core or the electric current flowed through.U phase coil 120U, V phase coil 120V and W phase lines
Circle 120W will cut the magnetic line of force of this rotating excitation field, and then generate threephase AC electric energy and exchanged to the U phases of rectifier circuit 130
End 130U, V phase exchanges end 130V and exchanges end 130W with W phases.
Rectifier circuit 130 receives the threephase AC electric energy from stator coil portion 120.Rectifier circuit 130 by this three
Phase AC energy is converted to direct current energy, and by direct current energy via the first DC voltage output end (such as power end B+) and the
Two DC voltage output ends (such as ground terminal GND) are supplied to accumulator 20.It is worth noting that, accumulator 20 can also be via
Power end B+ and ground terminal GND provides direct current energy to control circuit 141 and rotor coil 110.
In embodiment illustrated in fig. 2, rectifier circuit 130 includes diode 232U, V under diode 231U, U phase in U phases
Diode 232W under diode 231W and W phase in diode 232V, W phase under diode 231V, V phases in phase.Diode in U phases
The cathode of diode 231W is commonly coupled to the first of vehicle alternator 100 in diode 231V and W phases in 231U, V phase
DC voltage output end (such as power end B+).Diode 232W under diode 232V and W phases under diode 232U, V phases under U phases
Anode be commonly coupled to the second DC voltage output end (such as ground terminal GND) of vehicle alternator 100.Two in U phases
The U phases that the anode of pole pipe 231U is commonly coupled to rectifier circuit 130 with the cathode of diode 232U under U phases exchange end 130U.V
The anode of diode 231V is jointly electrically connected to the V phases of rectifier circuit 130 with the cathode of diode 232V under V phases and exchanges in phase
Hold 130V.The cathode of the anode of diode 231W and diode 232W under W phases are commonly coupled to the W of rectifier circuit 130 in W phases
Mutually exchange end 130W.
In embodiment illustrated in fig. 2, detection circuit 142 is coupled to rotor coil 110, is operated with receiving rotor coil 110
When generated rotor voltage signal SR.In addition, detection circuit 142 is further coupled to stator coil portion 120, to receive stator coil
Generated stator voltage sig PS when portion 120 operates.Stator voltage sig PS may be from the U phase lines in stator coil portion 120
Enclose 120U, V phase coil 120V or W phase coil 120W any of which phases, and be in the present embodiment using come from U phase coils 120U as
Example.
It should be noted that the stator coil portion 120 of Fig. 2 embodiments and its corresponding rectifier circuit 130 are with three-phase
Illustrate for example, but the present invention is not limited thereto, the number of phases in stator coil portion 120 and its corresponding rectifier circuit 130 can
Change depending on practical application or design requirement.
It is below the model according to detection circuit shown in one embodiment of the invention definition graph 1 referring to Fig. 1 and Fig. 3, Fig. 3
Example circuit diagram.Detection circuit 142 includes input selection circuit 341, resistor 342, comparator 343, low-pass filter 344
And frequency calculator 345.Input selection circuit 341 is receiving selection signal SEL, rotor voltage signal SR and stator voltage
Signal PS, and selected according to selection signal SEL the one of which of rotor voltage signal SR and stator voltage sig PS using as
Detect signal DS, wherein selection signal SEL to indicate vehicle alternator 100 carry out self-excitation magnetic starting running.In this hair
In a bright embodiment, multiplexer can be used in input selection circuit 341 or switch is realized, but the present invention not as
Limit.
Resistor 342 is coupled between the output terminal of input selection circuit 341 and ground terminal GND, can be used to inhibit noise
Interference.Comparator 343 is coupled to the output terminal of input selection circuit 341 to receive detection signal DS, will detect signal
DS is compared with critical voltage signal Vth, and generates comparison signal CMPS according to this.Low-pass filter 344 is coupled to comparator
343 to receive comparison signal CMPS, and carries out low-pass filtering treatment to comparison signal CMPS to generate filtering signal FS.
Frequency calculator 345 is coupled to low-pass filter 344 with the signal FS that accepts filter, to calculate filtering signal FS's
Frequency using as calculate vehicle alternator 100 rotating speed foundation.In one embodiment of this invention, work as frequency calculator
345 after the frequency (that is, frequency of rotor voltage signal SR or stator voltage sig PS) for calculating filtering signal FS, can
By frequency calculator 345 or other computing circuits (such as microprocessor or digital signal processor) according to above-mentioned formula (1)
Or formula (2) carries out operation to obtain the rotating speed of vehicle alternator 100.In addition, the implementation detail of frequency calculator 345 can be with
It is determined according to design requirement.Such as in some embodiments, it is known that frequency calculator may be utilized realize frequency calculate
Device 345, therefore the details of operation of frequency calculator 345 repeats no more.
Below referring to Fig. 1 and Fig. 4, detection circuit 142 ' includes input selection circuit 341, resistor 342, quick
Fourier transform (Fast Fourier Transform, FFT) circuit 443 and spectrum analyzer circuit 444, wherein Fig. 4's is defeated
Enter selection circuit 341 and resistor 342 is analogous respectively to the input selection circuit 341 of Fig. 3 and resistor 342, therefore its embodiment party
Formula and running can refer to the related description of above-mentioned Fig. 3, and details are not described herein.
Fast Fourier transform circuit 443 is coupled to the output terminal of input selection circuit 341 to receive detection signal DS, and
Quick Fourier transformation computation is carried out to detection signal DS, signal DS will be detected and be converted to frequency-region signal FQS.Such as Fig. 5 institutes
Show, the time-domain signal (detecting signal DS) on the left of Fig. 5 can be converted to the frequency on the right side of Fig. 5 by fast Fourier transform circuit 443
Domain signal FQS.
Spectrum analyzer circuit 444 is coupled to fast Fourier transform circuit 443 to receive frequency-region signal FQS, and to frequency domain
Signal FQS is analyzed the frequency to obtain frequency-region signal FQS, using as calculate vehicle alternator 100 rotating speed according to
According to.For example, spectrum analyzer circuit 444 can detect the frequency of frequency-region signal FQS according to the frequency-region signal FQS on the right side of Fig. 5
Rate is 3 hertz, and amplitude is 100 millivolts.In one embodiment of this invention, when spectrum analyzer circuit 444 is obtaining frequency domain letter
It, can be by spectrum analyzer circuit after the frequency (that is, frequency of rotor voltage signal SR or stator voltage sig PS) of number FQS
444 or other computing circuits (such as microprocessor or digital signal processor), it is transported according to above-mentioned formula (1) or formula (2)
Calculate the rotating speed to obtain vehicle alternator 100.Known frequency spectrum analyser can be employed to achieve spectrum analyzer circuit
444, therefore the details of operation of spectrum analyzer circuit 444 repeats no more.
In one embodiment of this invention, fast Fourier transform circuit 443 and spectrum analyzer circuit 444 can be hard
Part, firmware are stored in memory and can be held by the software or machine of microprocessor or digital signal processor institute load and execution
Line program code.If employing hardware to realize, then fast Fourier transform circuit 443 and spectrum analyzer circuit 444 can be
Reached by single integrated circuit chip, can also be completed by multiple circuit chips, but the present invention is not limited thereto system.On
It states multiple circuit chips or specific function integrated circuit (ASIC) or programmable logic gate can be used in single integrated circuit chip
Array (FPGA) is realized.And above-mentioned memory can be such as random access memory, read-only memory or flash memory etc..
It is below according to the vehicle alternator shown by one embodiment of the invention referring to Fig. 1 and Fig. 6, Fig. 6
The step flow chart of 100 Rotating speed measring method.The Rotating speed measring method of vehicle alternator 100 includes the following steps.It is first
First, after step S600 starts, in step S610, judge whether vehicle alternator 100 carries out self-excitation magnetic starting fortune
Make.If the judging result of step S610 is yes, the self-excitation magnetic starting running of step S620 is performed.In step S620, can pass through
Adjuster 140 detects the frequency of rotor voltage signal SR caused by rotor coil 110, using as calculating automobile-used alternative electric generation
The foundation of the rotating speed of machine 100.Then, in step S630, judge whether vehicle alternator 100 has completed self-excitation magnetic starting
Running, that is, whether have calculated that the rotating speed of vehicle alternator 100.If the judging result of step S630 is no, return to
Step S620.If the judging result of step S630 is yes, step S640 is performed.In step S640, adjuster 140 can be passed through
The frequency of the stator voltage sig PS in detection stator coil portion 120 is changed to, using turning as calculating vehicle alternator 100
The foundation of speed.On the other hand, if the judging result of step S610 is no, that is, vehicle alternator 100 and non-executing self-excitation
Magnetic starting operates, then performs step S640.
In addition, the details of the Rotating speed measring method of the vehicle alternator 100 of the embodiment of the present invention, it can be by Fig. 1 extremely
Enough teachings are obtained in the narration of Fig. 5 embodiments, suggestion illustrates that so it will not be repeated with implementing.
In conclusion the adjuster, vehicle alternator and its Rotating speed measring method that are proposed in the embodiment of the present invention
In, it can be when vehicle alternator carries out self-excitation magnetic starting with residual magnetism, by the rotor voltage signal for detecting rotor coil
Amplitude and frequency, using the foundation as the rotating speed for calculating vehicle alternator.Since rotor voltage signal has no potential shift
The phenomenon that, and will not be influenced by rectifier circuit electric leakage or load effect, therefore the frequency of rotor voltage signal is easy to examine
It surveys.Thus, in addition to can correctly calculate the rotating speed of vehicle alternator to promote the performance of self-excitation magnetic starting, moreover it is possible to
Simplify the circuit complexity of adjuster.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any technical field
Middle tool usually intellectual, it is without departing from the spirit and scope of the present invention, therefore of the invention when can make a little change and retouching
Protection domain subject to be defined depending on appended claims.
Claims (10)
1. a kind of adjuster, for vehicle alternator, which is characterized in that including：
Control circuit is coupled to the rotor coil of the vehicle alternator, and the electric current of the rotor coil is flowed through with control；
And
Detection circuit is coupled to the rotor coil to receive the rotor voltage signal of the rotor coil,
When the vehicle alternator carries out the running of self-excitation magnetic starting, the detection circuit detects the rotor voltage signal
Frequency, using the foundation as the rotating speed for calculating the vehicle alternator.
2. adjuster according to claim 1, it is characterised in that：
When the vehicle alternator carries out the self-excitation magnetic starting running, the control circuit is disabled state, is caused
The electric current of the rotor coil is zero.
3. adjuster according to claim 1, it is characterised in that：
The detection circuit is further coupled to the node between the stator coil portion of the vehicle alternator and rectifier circuit,
To receive the stator voltage sig in the stator coil portion；And
After the vehicle alternator completes the self-excitation magnetic starting running, the detection circuit is changed to described in detection
The frequency of stator voltage sig, using the foundation as the rotating speed for calculating the vehicle alternator.
4. adjuster according to claim 3, it is characterised in that：
The relationship of the frequency of the stator voltage sig and the frequency of the rotor voltage signal is fr=fs × P；
And
The frequency of the stator voltage sig and the relationship of the rotating speed of the vehicle alternator are N=60 × fs
÷ P,
Wherein, fr is the frequency of the rotor voltage signal, and unit is hertz；Fs is the described of the stator voltage sig
Frequency, unit are hertz；P be the vehicle alternator extremely to quantity；And N is the vehicle alternator
The rotating speed, unit are rotating speed per minute.
5. adjuster according to claim 3, which is characterized in that the detection circuit includes：
Input selection circuit, to receive selection signal, the rotor voltage signal and the stator voltage sig, and according to institute
It states selection signal and selects the one of which of the rotor voltage signal and the stator voltage sig using as detection signal,
Described in selection signal indicating that the vehicle alternator carries out the self-excitation magnetic starting running；
Resistor is coupled between the output terminal and ground terminal of the input selection circuit；
Comparator is coupled to the output terminal of the input selection circuit to receive the detection signal, to by the inspection
Signal is surveyed to be compared, and generate comparison signal according to this with critical voltage signal；
Low-pass filter is coupled to the comparator to receive the comparison signal, and carry out low pass filtered to the comparison signal
Wave handles to generate filtering signal；And
Frequency calculator is coupled to the low-pass filter to receive the filtering signal, to calculate the filtering signal
Frequency is using the foundation as the rotating speed for calculating the vehicle alternator.
6. adjuster according to claim 3, which is characterized in that the detection circuit includes：
Input selection circuit, to receive selection signal, the rotor voltage signal and the stator voltage sig, and according to institute
It states selection signal and selects the one of which of the rotor voltage signal and the stator voltage sig using as detection signal,
Described in selection signal indicating that the vehicle alternator carries out the self-excitation magnetic starting running；
Resistor is coupled between the output terminal and ground terminal of the input selection circuit；
Fast Fourier transform circuit is coupled to the output terminal of the input selection circuit to receive the detection signal,
Quick Fourier transformation computation is carried out to the detection signal, the detection signal is converted into frequency-region signal；And
Spectrum analyzer circuit is coupled to the fast Fourier transform circuit to receive the frequency-region signal, and the frequency domain is believed
Number analyzed the frequency to obtain the frequency-region signal, using as the rotating speed for calculating the vehicle alternator according to
According to.
7. a kind of vehicle alternator, which is characterized in that including：
Rotor coil；And
Adjuster, including：
Control circuit is coupled to the rotor coil, and the electric current of the rotor coil is flowed through with control；And
Detection circuit is coupled to the rotor coil to receive the rotor voltage signal of the rotor coil,
When the vehicle alternator carries out the running of self-excitation magnetic starting, the detection circuit detects the rotor voltage signal
Frequency, using the foundation as the rotating speed for calculating the vehicle alternator.
8. vehicle alternator according to claim 7, which is characterized in that further include：
Stator coil portion, wherein the rotor coil and stator coil portion Collaboration are to convert mechanical energy into alternating current
Energy；And
Rectifier circuit is coupled to the stator coil portion, the AC energy is converted to direct current energy, wherein：
The detection circuit is further coupled to the node between the stator coil portion and the rectifier circuit, described fixed to receive
The stator voltage sig in subcoil portion；And
After the vehicle alternator completes the self-excitation magnetic starting running, the detection circuit is changed to described in detection
The frequency of stator voltage sig, using the foundation as the rotating speed for calculating the vehicle alternator.
9. a kind of Rotating speed measring method of vehicle alternator, the vehicle alternator includes rotor coil, stator line
Circle portion, rectifier circuit and adjuster, which is characterized in that the method includes：
Judge whether the vehicle alternator carries out self-excitation magnetic starting running；And
If judging, the vehicle alternator carries out the self-excitation magnetic starting running, turns by the way that adjuster detection is described
The frequency of the rotor voltage signal of subcoil, using the foundation as the rotating speed for calculating the vehicle alternator.
10. the Rotating speed measring method of vehicle alternator according to claim 9, which is characterized in that further include：
Judge whether the vehicle alternator completes the self-excitation magnetic starting running；And
If judging, the vehicle alternator completes the self-excitation magnetic starting running, is changed to detect by the adjuster
The stator coil portion is supplied to the frequency of the stator voltage sig of the rectifier circuit, using as calculating the automobile-used exchange
The foundation of the rotating speed of generator.
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| CN101055294A (en) * | 2007-05-31 | 2007-10-17 | 王鹏 | Dynamotor rotor voltage and current measuring method and its device |
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| CN101819257A (en) * | 2010-05-19 | 2010-09-01 | 丰满发电厂 | Generator rotor parameter measuring device |
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| CN103780177A (en) * | 2012-10-19 | 2014-05-07 | 广州汽车集团股份有限公司 | Automobile AC generator voltage regulator and voltage regulation method |
| US20140365153A1 (en) * | 2013-06-07 | 2014-12-11 | Hamilton Sundstrand Corporation | Sensorless monitoring of electric generator rotor unbalance |
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2016
- 2016-12-28 CN CN201611238643.5A patent/CN108258955B/en not_active Expired - Fee Related
Patent Citations (8)
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| CN101055294A (en) * | 2007-05-31 | 2007-10-17 | 王鹏 | Dynamotor rotor voltage and current measuring method and its device |
| CN101807810A (en) * | 2009-02-12 | 2010-08-18 | 国产电机株式会社 | Generating power supply device |
| CN101819257A (en) * | 2010-05-19 | 2010-09-01 | 丰满发电厂 | Generator rotor parameter measuring device |
| CN202737800U (en) * | 2011-09-01 | 2013-02-13 | 利莱森玛电机公司 | System for regulating generator set |
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