CN105929248A - Inductor maintenance method and device of power factor corrector on electronic control board - Google Patents

Abstract

The invention discloses an inductor maintenance method and device of a power factor corrector on an electronic control board. The method includes the following steps that: when the electronic control board is electrified for the first time, the inductor of the power factor corrector is identified, so that a first inductance value can be obtained; after the electronic control board is electrified every time, the inductor of the power factor corrector is identified for at least once, and the last identification result of the inductor of the power factor corrector before the power failure of the electronic control board is adopted as a second inductance value; and a time node when a fault occurs on the inductor is judged according to the first inductance value, the second inductance value and a preset nominal inductance value of the failed electronic control board. According to the method, the inductor is identified when the electronic control board is electrified every time, so that the inductance values of the inductor can be obtained, when the electronic control board cannot work normally, whether an abnormality occurs on the inductor can be judged according to the obtained inductance values, and the time node when the abnormality occurs can be also judged according to the obtained inductance values, and therefore, analysis and maintenance on the electric control board can be benefitted for maintenance personnel.

Description

The inductance repair method of power factor corrector and device on electric-controlled plate

Technical field

The present invention relates to power factor corrector technical field, particularly to the inductance of power factor corrector on a kind of electric-controlled plate Repair method and device.

Background technology

Most household electrical appliance use following circuit topologies: single phase alternating current power supply through the DC voltage of uncontrollable rectification output ripple, Again through power factor corrector regulation output galvanic current pressure, then it is connected to jumbo electrochemical capacitor, gives the most again Internal switch power supply and basic load are powered.Wherein, power factor corrector commonly uses Boost type PFC (Power Factor Correction, PFC) circuit, i.e. it is made up of inductance, power switch pipe and diode.

Wherein, inductance is during production and transport or installing and using, it is possible to create magnetic core fracture, fragmentation or demagnetization etc. are existing As so that the sensibility reciprocal of inductance seriously diminishes, thus causes power factor emendation function abnormal.When occurring that such is abnormal, contain The electric-controlled plate of power factor correction device generally cannot normally work, and can be returned producer and be analyzed, and analysis is for convenience No causing electric-controlled plate normally to work because inductance is abnormal, the present invention proposes the electricity of power factor corrector on a kind of electric-controlled plate Sense repair method.

Summary of the invention

It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention Purpose is to propose the inductance repair method of power factor corrector on a kind of electric-controlled plate, and the method is when electric-controlled plate powers on every time Inductance carries out the identification inductance value with acquisition inductance, and with when electric-controlled plate fault, the inductance value according to obtaining judges that inductance is No occur abnormal, and abnormal timing node occurs, thus beneficially maintainer is to the analysis of electric-controlled plate and maintenance.

Further object is that and propose the inductance apparatus for examination and repair of power factor corrector on a kind of electric-controlled plate.

For achieving the above object, one aspect of the present invention embodiment proposes the inductance inspection of power factor corrector on a kind of electric-controlled plate Repair method, comprise the following steps: when described electric-controlled plate first powers on, the inductance of described power factor corrector is carried out Identification is to obtain the first inductance value；After described electric-controlled plate powers on every time, the inductance of described power factor corrector is carried out to A few identification, and obtain before described electric-controlled plate power down to the last identification result of inductance of described power factor corrector with As the second inductance value；The first inductance value, the second inductance value and default nominal inductance value according to fault electric-controlled plate judge institute State the timing node that inductance breaks down.

On electric-controlled plate according to embodiments of the present invention, the inductance repair method of power factor corrector, first powers at electric-controlled plate Time, the inductance of power factor corrector is carried out identification to obtain the first inductance value, and after electric-controlled plate powers on every time, to merit The inductance of rate factor corrector carries out identification at least one times, and obtains before electric-controlled plate power down to the inductance of power factor corrector A rear identification result is using as the second inductance value, and according to the first inductance value of fault electric-controlled plate, the second inductance value and pre- If nominal inductance value judge the timing node that inductance breaks down.Inductance is distinguished by the method when electric-controlled plate powers on every time Know to obtain the inductance value of inductance, with when electric-controlled plate cannot normally work, can judge that inductance is according to the inductance value obtained No occur abnormal, and abnormal time point occurs, thus beneficially maintainer is to the analysis of electric-controlled plate and maintenance.

According to one embodiment of present invention, if the difference between described first inductance value and described default nominal inductance value More than the first inductance threshold value, then judge that the timing node that described inductance breaks down is before described electric-controlled plate first powers on；As Difference between the most described second inductance value and described default nominal inductance value is more than the second inductance threshold value, then judge described electricity The timing node that sense is broken down is during described electric-controlled plate uses.

According to one embodiment of present invention, the inductance of described power factor corrector is carried out identification to obtain the first inductance value, Including: obtain the identification result for the first time of the inductance to described power factor corrector using as described first inductance value；Or, Obtain the meansigma methods of n times identification result before the inductance of described power factor corrector using as described first inductance value, wherein, Described N is the integer more than 1.

According to one embodiment of present invention, the inductance of described power factor corrector is carried out identification, including: obtain described The input voltage of power factor corrector, and obtain the input current of described power factor corrector, and obtain described power The output voltage of factor corrector；According to described input voltage, described input current, described output voltage and described power The duty of the power switch pipe of factor corrector carries out identification to described inductance.

For achieving the above object, another aspect of the present invention embodiment proposes the inductance of power factor corrector on a kind of electric-controlled plate Apparatus for examination and repair, including: the first acquiring unit, for when described electric-controlled plate first powers on, to described PFC The inductance of device carries out identification to obtain the first inductance value；Second acquisition unit, for after described electric-controlled plate powers on every time, right The inductance of described power factor corrector carries out identification at least one times, and obtains before described electric-controlled plate power down described power factor The last identification result of inductance of corrector is using as the second inductance value；Judging unit, for the according to fault electric-controlled plate One inductance value, the second inductance value and default nominal inductance value judge the timing node that described inductance breaks down.

The inductance apparatus for examination and repair of power factor corrector on the electric-controlled plate proposed according to embodiments of the present invention, at electric-controlled plate for the first time When powering on, the inductance of power factor corrector is carried out identification to obtain the first inductance value, and after electric-controlled plate powers on every time, The inductance of power factor corrector is carried out identification at least one times, and obtains before electric-controlled plate power down the electricity to power factor corrector Feel last identification result using as the second inductance value, and according to the first inductance value of fault electric-controlled plate, the second inductance value The timing node that inductance breaks down is judged with default nominal inductance value.Inductance is entered by this device when electric-controlled plate powers on every time Row identification, to obtain the inductance value of inductance, with when electric-controlled plate cannot normally work, can judge electricity according to the inductance value obtained Whether sense there is exception, and abnormal time point occurs, thus beneficially maintainer is to the analysis of electric-controlled plate and maintenance.

According to one embodiment of present invention, if the difference between described first inductance value and described default nominal inductance value More than the first inductance threshold value, described judging unit then judges that the timing node that described inductance breaks down is described electric-controlled plate first Secondary power on before；If the difference between described second inductance value and described default nominal inductance value is more than the second inductance threshold value, Described judging unit then judges that the timing node that described inductance breaks down is during described electric-controlled plate uses.

According to one embodiment of present invention, the inductance of described power factor corrector is being distinguished by described first acquiring unit When knowing to obtain the first inductance value, wherein, described first acquiring unit obtains the inductance first to described power factor corrector Secondary identification result is using as described first inductance value；Or, described first acquiring unit obtains described power factor corrector Inductance before the meansigma methods of n times identification result using as described first inductance value, wherein, described N is the integer more than 1.

According to one embodiment of present invention, above-mentioned inductance apparatus for examination and repair also includes: voltage acquisition unit, is used for obtaining institute State input voltage and the output voltage of described power factor corrector of power factor corrector；Electric current acquiring unit, is used for obtaining Take the input current of described power factor corrector；Described first acquiring unit or described second acquisition unit are according to described defeated Enter the duty of the power switch pipe of voltage, described input current, described output voltage and described power factor corrector Described inductance is carried out identification.

Accompanying drawing explanation

Fig. 1 is the topological diagram of power factor corrector according to an embodiment of the invention；

Fig. 2 is the inductance identification schematic diagram according to first embodiment of the invention；

Fig. 3 is the inductance identification schematic diagram according to second embodiment of the invention；

Fig. 4 is the inductance identification schematic diagram according to third embodiment of the invention；

Fig. 5 is the inductance identification schematic diagram according to four embodiment of the invention；

Fig. 6 is the flow chart of the inductance repair method of power factor corrector on electric-controlled plate according to embodiments of the present invention；

Fig. 7 is the block diagram of the inductance apparatus for examination and repair of power factor corrector on electric-controlled plate according to embodiments of the present invention；And

Fig. 8 is the block diagram of the inductance apparatus for examination and repair of power factor corrector on electric-controlled plate according to an embodiment of the invention.

Detailed description of the invention

Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.

The inductance maintenance of power factor corrector on the electric-controlled plate proposed according to embodiments of the present invention is described with reference to the accompanying drawings Method and apparatus.

In an embodiment of the present invention, as it is shown in figure 1, single phase ac input circuit of power factor correction electric-controlled plate on Can include control chip, main circuit and testing circuit, main circuit includes rectifier bridge, filter capacitor, power factor corrector With big capacity electrolyte capacitor and load, power factor corrector includes inductance, power switch pipe and diode, wherein, merit Rate switching tube can be IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) and MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, Metal-Oxide Semiconductor field Effect transistor), diode can be fast recovery diode.

When power switch pipe is opened, input voltage V_bdBeing applied on inductance and power switch pipe, electric current is from the anode of rectifier bridge Output, flows through inductance, power switch pipe and sampling resistor, returns to the negative terminal of rectifier bridge.Inductive current linearly rises, its Variation relation meets:

$V_{bd}=L\×\frac{d}{dt}{I}_{ind}+V_{IGBT}---\left(1\right)$

Wherein, V_bdFor input voltage, L is the inductance value of inductance, I_indFor input current, V_IGBTLeading for power switch pipe Logical pressure drop.

When power switch pipe turns off, input voltage V_bdBeing applied on inductance and diode, electric current exports from the anode of rectifier bridge, Flow through inductance, diode enters electrochemical capacitor and load, then returns to the negative terminal of rectifier bridge through sampling resistor.At input voltage V_bd Higher than output voltage V_dcTime, inductive current continues to rise, otherwise electric current declines, and curent change relation meets:

$V_{bd}=L\×\frac{d}{dt}{I}_{ind}+V_{FRD}+V_{dc}---\left(2\right)$

Wherein, V_FRDFor the conduction voltage drop of diode, V_dcFor output voltage.

Control chip is by detection input voltage V_bd(i.e. DC voltage after rectifier bridge, before power factor corrector), Input current I_ind(i.e. inductive current) and output voltage V_dc(i.e. the voltage at electrochemical capacitor two ends or DC bus-bar voltage) Carry out control and the inductance identification of power factor corrector.Wherein, input current I_indResistance sampling method can be used or pass through Hall current sensor detects, input voltage V_bdWith output voltage V_dcElectric resistance partial pressure method can be used to detect.

In one embodiment of the invention, the inductance of power factor corrector is carried out identification, including: obtain power factor The input voltage V of corrector_bd, and obtain the input current I of power factor corrector_ind, and obtain power factor corrector Output voltage V_dc；According to input voltage V_bd, input current I_ind, output voltage V_dcAnd the power of power factor corrector The duty of switching tube carries out identification to inductance.

Specifically, when inductance is carried out identification, control chip can inject test voltage to inductance, simultaneously by sampling The method detection input current I such as resistance_ind, then according to Flux consumption and the input current I injecting test voltage effect_indChange Amount carries out identification to inductance, to obtain the Flux consumption/input current I of the inductance value=injection test voltage effect of inductance_indChange Change amount, i.e. by the inductance value of following formula (3) acquisition inductance:

$L=\frac{{\∫}_{t_1}^{t_2}{V}_{ind}dt}{I_{ind}\left(t_2\right)-I_{ind}\left(t_1\right)}---\left(3\right)$

Wherein, t₁And t₂It is respectively start time and finish time, I that test voltage is injected_ind(t₁) and I_ind(t₂) be respectively and survey Examination voltage injects input current and the input current of test voltage injection finish time, the V of start time_indElectricity for inductance two ends Pressure (is also referred to as used in the voltage on inductance, or claims the counter electromotive force of inductance generation), in an embodiment of the present invention, can pass through The voltage at following formula (4) calculating inductance two ends:

As a kind of example, as in figure 2 it is shown, control chip can inject n times pulse voltage to inductance, if kth subpulse The dutycycle that voltage injects is Duty (k), input current I_indStart from scratch and rise to I_indK (), is then shut off pulse voltage defeated Go out, until input current I_indDrop to re-start again after zero the injection of pulse voltage next time, so that input current I_indWork Make in on-off state.

Then, according in n times pulse voltage injection length, under power switch pipe is in the conduction state, injected pulse voltage is made The accumulation amount of Flux consumption and the accumulation amount of input current variable quantity calculate the inductance value of inductance, i.e. when injecting to inductance During n times pulse voltage, can be by the inductance value of following formula (5) acquisition inductance:

$L=\frac{\underset{k=0}{\overset{N-1}{\Σ}}\[(V_{bd}-V_{IGBT})\·Duty\left(k\right)\·T_{PWM}\]}{\underset{k=0}{\overset{N-1}{\Σ}}\[I_{ind}\left(k\right)\]}---\left(5\right)$

Wherein, Duty (k) is the dutycycle of the pulse voltage that kth time is injected, T_PWMFor the working cycle of power switch pipe, I_indK () is the variable quantity of the input current during injection of kth subpulse voltage, N and k is positive integer.

It should be noted that in this example, the setting of dutycycle and input voltage V_bd, output voltage V_dc, the inductance of inductance Be worth relevant with the maximum current value that power switch pipe allows, i.e. dutycycle meetsAnd dutycycle can not be arranged Too small, affect accuracy of detection, extend detection time, wherein L₀For the inductance value under inductance normal condition, I_thOpen for power Close the maximum current value that pipe allows.

As another example, as it is shown on figure 3, when using continuous voltage injection method, i.e. allow power switch pipe be operated in and continue Opening state, the dutycycle being equivalent to N number of PWM (Pulse Width Modulation, pulse width modulation) cycle is equal It is 100%, now V_ind=V_bd-V_IGBT, then according to Flux consumption and the input electricity of N number of PWM cycle build-in test voltage effect The variable quantity of stream calculates the inductance value of inductance, i.e. by the inductance value of following formula (6) acquisition inductance:

$L=\frac{\underset{k=0}{\overset{N-1}{\Σ}}(V_{bd}-V_{IGBT})T_{PWM}}{T_{ind}\left(N\right)-I_{ind}\left(0\right)}---\left(6\right)$

Wherein, T_PWMFor the working cycle of power switch pipe, I_indAnd I (0)_ind(N) it is respectively test voltage and injects start time Input current and test voltage inject finish time input current.

As another example, as shown in Figure 4, when using modulation voltage injection method, power switch pipe is i.e. allowed to be operated in pulsewidth During modulation condition, the dutycycle being equivalent to N number of PWM cycle is adjustable in 0-100% scope, now, and the voltage at inductance two endsThen make according to N number of PWM cycle build-in test voltage Flux consumption and the variable quantity of input current calculate the inductance value of inductance, i.e. obtained the electricity of inductance by following formula (7) Inductance value:

$L=\frac{\underset{k=0}{\overset{N-1}{\Σ}}\[(V_{bd}-V_{IGBT})\·D+(V_{bd}-V_{FRD}-V_{dc})\·(1-D)\]T_{PWM}}{I_{ind}\left(N\right)-I_{ind}\left(0\right)}---\left(7\right)$

Wherein, T_PWMFor the working cycle of power switch pipe, D is the conducting dutycycle of power switch pipe, I_indAnd I (0)_ind(N) It is respectively test voltage and injects input current and the input current of test voltage injection finish time of start time.

It should be noted that in this example, the setting of the conducting dutycycle of power switch pipe and input voltage V_bd, output electricity Pressure V_dc, inductance inductance value relevant with the maximum current value that power switch pipe allows, i.e. power switch pipe conducting dutycycle need Meet

As another example, as it is shown in figure 5, when injecting modulated test voltage to inductance, i.e. allow power switch pipe work When pulsewidth modulation state, the dutycycle being equivalent to N number of PWM cycle is adjustable in 0-100% scope, now, and inductance two ends VoltageThen according in N number of PWM cycle, power The accumulation amount of the Flux consumption of modulated test voltage effect when switching tube is in the conduction state and the variable quantity of input current cumulative Amount calculates the inductance value of inductance, i.e. by the inductance value of following formula (8) acquisition inductance:

$L=\frac{\underset{k=0}{\overset{N-1}{\Σ}}\[(V_{bd}-V_{IGBT})\·D\·T_{PWM}\]}{\underset{k=0}{\overset{N-1}{\Σ}}\[I_{ind2}\left(k\right)-I_{ind1}\left(k\right)\]}---\left(8\right)$

Wherein, T_PWMFor the working cycle of power switch pipe, D is the conducting dutycycle of power switch pipe, I_ind1(k) and I_ind2K () is respectively kth working cycle internal modulation test voltage and injects input current and the modulated test voltage note of start time Entering the input current of finish time, N and k is positive integer.

It should be noted that in this example, the setting of dutycycle and input voltage V_bd, output voltage V_dc, the inductance of inductance Be worth relevant with the maximum current value that power switch pipe allows, i.e. dutycycle need to meetAnd dutycycle can not be arranged Too small, affect accuracy of detection, extend the detection time.

It should be noted that the input voltage V of the power factor corrector according to detection_bd, input current I_ind, output voltage V_dc And in power factor corrector, the duty of power switch pipe carries out the method for identification and has multiple inductance, such as, also may be used With at input voltage V_bdBe in predeterminated voltage interval, control power switch pipe conducting, and according to power switch pipe turn on during Input current I_indVariable quantity and input voltage V_bdCalculate the inductance value of inductance, repeat no more the most here.

Fig. 6 is the flow chart of the inductance repair method of power factor corrector on the electric-controlled plate proposed according to embodiments of the present invention. As shown in Figure 6, the inductance repair method of power factor corrector on this electric-controlled plate, comprise the following steps:

S1, when electric-controlled plate first powers on, carries out identification to obtain the first inductance value to the inductance of power factor corrector.

According to one embodiment of present invention, the inductance of power factor corrector is carried out identification to obtain the first inductance value, bag Include: obtain the identification result for the first time of the inductance to power factor corrector using as the first inductance value；Or, obtain power Before the inductance of factor corrector, the meansigma methods of n times identification result is using as the first inductance value, and wherein, N is the integer more than 1.

Specifically, before electric-controlled plate dispatches from the factory, can be by the system initialization flag bit set of electric-controlled plate.After electric-controlled plate dispatches from the factory And when powering on for the first time (now system initialization flag bit set), according to the input voltage V of the power factor corrector of detection_bd、 Input current I_ind, output voltage V_dcAnd the duty of power switch pipe carries out identification to inductance in power factor corrector, And inductance value first time inductance identification obtained is stored in first storage of EEPROM on electric-controlled plate as the first inductance value Space, then resets system initialization flag bit.

Or, before electric-controlled plate dispatches from the factory, by the system initialization flag bit set of electric-controlled plate.After electric-controlled plate dispatches from the factory, when being During system position, initialization flag position, the meansigma methods of the inductance value obtained during using front n times inductance identification is deposited as the first inductance value Storage first memory space of EEPROM on electric-controlled plate, then resets system initialization flag bit.For example, it is possible to automatically controlled When plate powers on for the first time, inductance is carried out repeatedly identification, and using electric as first for the meansigma methods of the inductance value obtained during repeatedly identification Inductance value stores, to improve the accuracy of inductance identification result.

S2, electric-controlled plate powers on after every time, carries out identification at least one times to the inductance of power factor corrector, and obtains automatically controlled To the last identification result of inductance of power factor corrector using as the second inductance value before plate power down.

It is to say, power on the Shi Douhui input voltage V of power factor corrector according to detection at electric-controlled plate every time_bd, input Electric current I_ind, output voltage V_dcAnd the duty of power switch pipe carries out identification, example to inductance in power factor corrector As, an identification or repeatedly identification can be carried out when powering on every time, to obtain the current inductance value of inductance in real time.At electricity During control plate uses, if there is phenomenons such as inductance core fracture, fragmentation or demagnetizations, power factor corrector will be caused Closing, the electric-controlled plate with this power factor corrector will be unable to normally work, now will identification last to inductance time institute The inductance value obtained is stored in second memory space of EEPROM on electric-controlled plate as the second inductance value.

According to the first inductance value, the second inductance value and the default nominal inductance value of fault electric-controlled plate, S3, judges that inductance occurs event The timing node of barrier.

According to one embodiment of present invention, if the difference between the first inductance value and default nominal inductance value is more than first Inductance threshold value, then judge that the timing node that inductance breaks down is before electric-controlled plate first powers on；If the second inductance value is with pre- If nominal inductance value between difference more than the second inductance threshold value, then judge that the timing node that inductance breaks down is electric-controlled plate During use.Wherein, the first inductance threshold value and the second inductance threshold value can be demarcated according to practical situation, such as, the One inductance threshold value and the second inductance threshold value can be the 5%-50% of nominal inductance value.

Specifically, when electric-controlled plate cannot normally work, producer will be returned and be analyzed and keep in repair, deposit now by reading First inductance value of storage first memory space of EEPROM on electric-controlled plate and the second inductance of second memory space of EEPROM Value, and the first inductance value and the second inductance value are compared with nominal inductance value respectively that can to judge whether inductance occurs different Often, and abnormal timing node occurs.

Wherein, if the difference between the first inductance value and nominal inductance value is more than the first inductance threshold value, then illustrate at electric-controlled plate Before powering on for the first time, (i.e. user use for the first time before) inductance occurs abnormal, it may be possible to cause in transportation inductance fracture or Person's fragmentation etc.；If the difference between the first inductance value and nominal inductance value is close to zero, then illustrate before electric-controlled plate powers on for the first time, Inductance is without exception.If the difference between the second inductance value and nominal inductance value is more than the second inductance threshold value, then explanation inductance is Exception in use occurs, it may be possible to demagnetization etc. occurs in inductance；If the difference between the second inductance value and nominal inductance value Value is close to zero, then explanation inductance is without exception, is now likely due to other reasons and causes electric-controlled plate cannot normally use, such as Diode is short-circuited or power switch pipe generation open circuit etc..So that maintainer can accurately and quickly judge electricity Whether sense there is exception, and abnormal timing node occurs.

In sum, the inductance repair method of power factor corrector on electric-controlled plate according to embodiments of the present invention, at electric-controlled plate When first powering on, the inductance of power factor corrector is carried out identification to obtain the first inductance value, and electric-controlled plate every time on After electricity, the inductance of power factor corrector is carried out identification at least one times, and obtain before electric-controlled plate power down PFC The last identification result of inductance of device using as the second inductance value, and according to the first inductance value of fault electric-controlled plate, second Inductance value and the nominal inductance value preset judge the timing node that inductance breaks down.The method is when electric-controlled plate powers on every time pair Inductance carries out identification to obtain the inductance value of inductance, with when electric-controlled plate cannot normally work, and can be according to the inductance value obtained Judge whether inductance occurs exception, and abnormal time point occur, thus beneficially maintainer to the analysis of electric-controlled plate and Maintenance.

Fig. 7 is the block diagram of the inductance apparatus for examination and repair of power factor corrector on electric-controlled plate according to embodiments of the present invention.Such as Fig. 7 Shown in, on this electric-controlled plate, the inductance apparatus for examination and repair of power factor corrector includes: the first acquiring unit 10, second acquisition unit 20 and judging unit 30.

Wherein, the inductance of power factor corrector, for when electric-controlled plate first powers on, is distinguished by the first acquiring unit 10 Know to obtain the first inductance value.

According to one embodiment of present invention, the first acquiring unit 10 is carrying out identification to obtain to the inductance of power factor corrector When taking the first inductance value, wherein, the first acquiring unit 10 obtain for the first time identification result of the inductance to power factor corrector with As the first inductance value；Or, the first acquiring unit 10 obtains n times identification result before the inductance to power factor corrector Meansigma methods is using as the first inductance value, and wherein, N is the integer more than 1.

Specifically, before electric-controlled plate dispatches from the factory, can be by the system initialization flag bit set of electric-controlled plate.After electric-controlled plate dispatches from the factory And when powering on for the first time (now system initialization flag bit set), the first acquiring unit 10 carries out identification to inductance, and by The inductance value that inductance identification is obtained is stored in first memory space of EEPROM on electric-controlled plate as the first inductance value, so After by system initialization flag bit reset.

Or, before electric-controlled plate dispatches from the factory, by the system initialization flag bit set of electric-controlled plate.After electric-controlled plate dispatches from the factory, when being During system position, initialization flag position, the meansigma methods of the inductance value obtained when the first acquiring unit 10 is by front n times inductance identification is made It is the first inductance value the first memory space of being stored in EEPROM on electric-controlled plate, then system initialization flag bit is reset.Example As, the first acquiring unit 10 can be carried out repeatedly identification when electric-controlled plate powers on for the first time, and obtain during by repeatedly identification inductance The meansigma methods of the inductance value obtained stores as the first inductance value, to improve the accuracy of inductance identification result.

The inductance of power factor corrector, for after electric-controlled plate powers on every time, is distinguished by second acquisition unit 20 at least one times Know, and obtain before electric-controlled plate power down the last identification result of inductance of power factor corrector using as the second inductance value.

It is to say, when electric-controlled plate powers on every time, second acquisition unit 20 all can carry out identification to inductance, for example, it is possible to An identification or repeatedly identification is carried out, to obtain the current inductance value of inductance in real time when powering on every time.Use at electric-controlled plate During, if there is phenomenons such as inductance core fracture, fragmentation or demagnetizations, power factor corrector will be caused to close, tool The electric-controlled plate having this power factor corrector will be unable to normally work, and now inductance will be distinguished by second acquisition unit 20 for the last time The inductance value obtained during knowledge is stored in second memory space of EEPROM on electric-controlled plate as the second inductance value.

Judging unit 30 judges for the first inductance value according to fault electric-controlled plate, the second inductance value and default nominal inductance value The timing node that inductance breaks down.

According to one embodiment of present invention, if the difference between the first inductance value and default nominal inductance value is more than first Inductance threshold value, it is judged that unit 30 then judges that the timing node that inductance breaks down is before electric-controlled plate first powers on；If second Difference between inductance value and default nominal inductance value is more than the second inductance threshold value, it is judged that unit 30 then judges that inductance occurs event The timing node of barrier is during electric-controlled plate uses.Wherein, the first inductance threshold value and the second inductance threshold value can be nominal inductance The 5%-50% of value.

Specifically, when electric-controlled plate cannot normally work, producer will be returned and be analyzed and keep in repair, now judging unit 30 The first inductance value of first memory space of EEPROM on electric-controlled plate and second memory space of EEPROM it is stored in by reading The second inductance value, and the first inductance value and the second inductance value are compared with nominal inductance value respectively can judge inductance Whether there is exception, and abnormal timing node occurs.

Wherein, if the difference between the first inductance value and nominal inductance value is more than the first inductance threshold value, then illustrate at electric-controlled plate Before powering on for the first time, (i.e. user use for the first time before) inductance occurs abnormal, it may be possible to cause in transportation inductance fracture or Person's fragmentation etc.；If the difference between the first inductance value and nominal inductance value is close to zero, then illustrate before electric-controlled plate powers on for the first time, Inductance is without exception.If the difference between the second inductance value and nominal inductance value is more than the second inductance threshold value, then explanation inductance is Exception in use occurs, it may be possible to demagnetization etc. occurs in inductance；If the difference between the second inductance value and nominal inductance value Value is close to zero, then explanation inductance is without exception, is now likely due to other reasons and causes electric-controlled plate cannot normally use, such as Diode is short-circuited or power switch pipe generation open circuit etc..So that maintainer can accurately and quickly judge electricity Whether sense there is exception, and abnormal timing node occurs.

According to one embodiment of present invention, as shown in Figure 8, the inductance maintenance of power factor corrector on above-mentioned electric-controlled plate Device also includes: voltage acquisition unit 40 and electric current acquiring unit 50, and wherein, voltage acquisition unit 40 is used for obtaining power The input voltage of factor corrector and the output voltage of power factor corrector, electric current acquiring unit 50 is used for obtaining power factor The input current of corrector, the first acquiring unit 10 or second acquisition unit 20 are according to input voltage, input current, defeated The duty of the power switch pipe going out voltage and power factor corrector carries out identification to inductance.Specifically how inductance is entered Row identification is already described above to obtain inductance value, repeats no more here.

The inductance apparatus for examination and repair of power factor corrector on the electric-controlled plate proposed according to embodiments of the present invention, at electric-controlled plate for the first time When powering on, the inductance of power factor corrector is carried out identification to obtain the first inductance value, and after electric-controlled plate powers on every time, The inductance of power factor corrector is carried out identification at least one times, and obtains before electric-controlled plate power down the electricity to power factor corrector Feel last identification result using as the second inductance value, and according to the first inductance value of fault electric-controlled plate, the second inductance value The timing node that inductance breaks down is judged with default nominal inductance value.Inductance is entered by this device when electric-controlled plate powers on every time Row identification, to obtain the inductance value of inductance, with when electric-controlled plate cannot normally work, can judge electricity according to the inductance value obtained Whether sense there is exception, and abnormal time point occurs, thus beneficially maintainer is to the analysis of electric-controlled plate and maintenance.

In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the One ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.

In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.

In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory Row combines and combination.

Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary, Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment It is changed, revises, replaces and modification.

Claims (8)

1. the inductance repair method of power factor corrector on an electric-controlled plate, it is characterised in that comprise the following steps:

When described electric-controlled plate first powers on, the inductance of described power factor corrector is carried out identification to obtain the first inductance Value；

Described electric-controlled plate powers on after every time, the inductance of described power factor corrector is carried out identification at least one times, and obtains To the last identification result of inductance of described power factor corrector using as the second inductance value before described electric-controlled plate power down；

The first inductance value, the second inductance value and default nominal inductance value according to fault electric-controlled plate judges that described inductance occurs event The timing node of barrier.

The inductance repair method of power factor corrector on electric-controlled plate the most according to claim 1, it is characterised in that

If the difference between described first inductance value and described default nominal inductance value is more than the first inductance threshold value, then judge The timing node that described inductance breaks down is before described electric-controlled plate first powers on；

If the difference between described second inductance value and described default nominal inductance value is more than the second inductance threshold value, then judge The timing node that described inductance breaks down is during described electric-controlled plate uses.

The inductance repair method of power factor corrector on electric-controlled plate the most according to claim 1 and 2, it is characterised in that The inductance of described power factor corrector is carried out identification to obtain the first inductance value, including:

Obtain the identification result for the first time of the inductance to described power factor corrector using as described first inductance value；Or,

Obtain the meansigma methods of n times identification result before the inductance of described power factor corrector using as described first inductance value, Wherein, described N is the integer more than 1.

The inductance repair method of power factor corrector on electric-controlled plate the most according to claim 1, it is characterised in that right The inductance of described power factor corrector carries out identification, including:

Obtain the input voltage of described power factor corrector, and obtain the input current of described power factor corrector, and Obtain the output voltage of described power factor corrector；

Power according to described input voltage, described input current, described output voltage and described power factor corrector is opened The duty closing pipe carries out identification to described inductance.

5. the inductance apparatus for examination and repair of power factor corrector on an electric-controlled plate, it is characterised in that including:

First acquiring unit, for when described electric-controlled plate first powers on, is carried out the inductance of described power factor corrector Identification is to obtain the first inductance value；

Second acquisition unit, for after described electric-controlled plate powers on every time, the inductance of described power factor corrector is carried out to A few identification, and obtain before described electric-controlled plate power down to the last identification result of inductance of described power factor corrector with As the second inductance value；

Judging unit, judges for the first inductance value according to fault electric-controlled plate, the second inductance value and default nominal inductance value The timing node that described inductance breaks down.

The inductance apparatus for examination and repair of power factor corrector on electric-controlled plate the most according to claim 5, it is characterised in that

If the difference between described first inductance value and described default nominal inductance value is more than the first inductance threshold value, described in sentence Disconnected unit then judges that the timing node that described inductance breaks down is before described electric-controlled plate first powers on；

If the difference between described second inductance value and described default nominal inductance value is more than the second inductance threshold value, described in sentence Disconnected unit then judges that the timing node that described inductance breaks down is during described electric-controlled plate uses.

7. according to the inductance apparatus for examination and repair of power factor corrector on the electric-controlled plate described in claim 5 or 6, it is characterised in that Described first acquiring unit is when carrying out identification to obtain the first inductance value to the inductance of described power factor corrector, wherein,

Described first acquiring unit obtains the identification result for the first time of the inductance to described power factor corrector using as described first Inductance value；Or,

Described first acquiring unit obtain to the meansigma methods of n times identification result before the inductance of described power factor corrector using as Described first inductance value, wherein, described N is the integer more than 1.

The inductance apparatus for examination and repair of power factor corrector on electric-controlled plate the most according to claim 5, it is characterised in that also Including:

Voltage acquisition unit, for obtaining the input voltage of described power factor corrector and the defeated of described power factor corrector Go out voltage；

Electric current acquiring unit, for obtaining the input current of described power factor corrector；

Described first acquiring unit or described second acquisition unit are according to described input voltage, described input current, described defeated The duty of the power switch pipe going out voltage and described power factor corrector carries out identification to described inductance.