CN102999079A

CN102999079A - Total power regulation method for electrothermal equipment

Info

Publication number: CN102999079A
Application number: CN2011102745602A
Authority: CN
Inventors: 麻百忠; 黄兵; 卞在银; 梁三林; 吴宗林; 雷俊; 黄庶锋; 董远; 刘慧芳
Original assignee: Midea Group Co Ltd
Current assignee: Midea Group Co Ltd
Priority date: 2011-09-16
Filing date: 2011-09-16
Publication date: 2013-03-27
Anticipated expiration: 2031-09-16
Also published as: CN102999079B

Abstract

The invention discloses a total power regulation method for electrothermal equipment. Practical output power P is equal to rated power P by regulating the turning-on time of an IGBT (insulated gate bipolar translator). The total power regulation method for the electrothermal equipment comprises the following steps of: 1) presetting data, and presetting the control pulse width of the IGBT under the rated power state; 2) regulating the power, detecting the difference value of the practical P value and the rated P value, increasing the control pulse width of the IGBT if the practical P value is less than the rated P value, and reducing the control pulse width of the IGBT until the practical P value is equal to the rated P value if the practical P value is less than the rated P value; and 3) storing the regulation amount, storing the regulation amount to a memory, and at the time ensuring that the practical output power is equal to the rated power. According to the total power regulation method for electrothermal equipment, which is disclosed by the invention, the stored revising amount is read during starting up each time in the use process and is compensated to the original control pulse width of the IGBT so as to achieve the requirements on compensating different total power differences and satisfying the power consistency of an outgoing product. The total power regulation method for the electrothermal equipment has the advantages of good safety performance and high efficiency.

Description

A kind of complete machine power regulating method of electric heating appliance

Technical field

The present invention relates to the electronic control technology field, relate in particular to a kind of complete machine power regulating method of electric heating appliance.

Background technology

[0002] use at present the product of electromagnetic heating device of software control IGBT because device difference and the suffered environmental interference of self device different, the Performance Detection stage after production is finished, circuit board or complete machine need to be readjusted power, make the power of the product that dispatches from the factory can be in claimed range.In the prior art, such as Fig. 3, mostly the mode of Modulating Power is at the acquisition circuit of voltage or electric current adjustable resistance to be installed, and the reference value that changes sampled signal by adjusting adjustable resistance reaches the purpose of Modulating Power.But this hardware adjustment power mode only is used in the circuit board that is adjusted into installation, after circuit board is contained in complete machine because the difference of load and disturb also deviation to some extent of difference power.At this moment just think to adjust again need to be on the specific position of complete machine perforate or stay the slit to allow instrument stretch into complete machine internal adjustment resistance, it is also dangerous and efficient is low so both to have affected product appearance.

Summary of the invention

The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art and provide a kind of and can carry out the complete machine power regulating method that complete machine power is adjusted in the Performance Detection stage of electric heating appliance product.

For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of complete machine power regulating method of electric heating appliance makes real output P by the service time of adjusting IGBT _ActualEqual rated power P _Specified, comprise the steps:

Step 1: preset data, the gating pulse width of the IGBT under the default rated power state;

Step 2: Modulating Power, detect P _ActualWith P _SpecifiedIf the difference size is P _Actual＜P _SpecifiedThen increase the gating pulse width of IGBT; If P _Actual＜P _{It is specified,}Then reduce the gating pulse width of IGBT to P _Actual=P _Specified

Step 3: preserve adjustment amount, adjustment amount is saved to storer, at this moment real output P _ActualEqual rated power P _Specified

Preferred version is that the described preset data of step 1 comprises:

Default rated power and IGBT service time tables of data;

The corresponding time of service time Δ T1 of 1 unit of programmable button counter increase and decrease.

Further, described step 2 is by control IGBT service time T control IGBT pulse width.

Further, the described Modulating Power of step 2 comprises:

Start first complete machine, the ingoing power adjustment modes;

Test out real output P under the rated voltage with the power testing tool _Actual, IGBT service time this moment is T;

Compare P _ActualWith P _SpecifiedBetween size; If P _Actual＜P _Specified, then press counter and " add " key and once increase simultaneously a service time Δ T1 of unit, this moment service time T _Actual=T+ Δ T1 is repeatedly to P _Actual=P _SpecifiedIf P _Actual﹥ P _SpecifiedThen press counter and " subtract " key and once reduce simultaneously by a service time Δ T1, repeatedly to P _Actual=P _Specified, multiplicity is n.

Further, step 3 is preserved the service time Δ T=n Δ T1 that needs adjustment.

Further, the T value is between 1uS ~ 50uS.

Another preferred version is that the described preset data of step 1 comprises:

Adjust the AD value of bleeder circuit;

The AD of the unit value variation of default bleeder circuit and the corresponding relation between the IGBT pulse width variation.

Further, described step 2 is to control the pulse width of IGBT by the AD value of adjusting the control bleeder circuit.

Further, the described Modulating Power of step 2 comprises:

Start first complete machine, the ingoing power adjustment modes;

Compare P _ActualWith P _SpecifiedBetween size; If P _Actual＜P _Specified, then increase the AD value in AD loop, to P _Actual=P _SpecifiedIf P _ActualP _Specified, then reduce the AD value in AD loop, to P _Actual=P _Specified

Compared with prior art, the present invention with respect to the beneficial effect of prior art is:

The present invention makes the electric heating appliance real output equal rated power by the service time of adjusting IGBT, the revision amount that reads storage when in use at every turn starting shooting compensates in original IGBT gating pulse width, to reach the different complete machine power differences of compensation, to satisfy the conforming requirement of product power of dispatching from the factory.Security performance is good and efficient is high.

Description of drawings

The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.

Fig. 1 is the process flow diagram that power is adjusted in the embodiment of the invention 1;

Fig. 2 is the process flow diagram that power is adjusted in the embodiment of the invention 2;

Fig. 3 is that prior art is carried out the process flow diagram that power is adjusted.

Embodiment

Such as Fig. 1, present embodiment comprises the steps:

At first, calculate under different voltage and current conditions from the relation between the IGBT make-and-break time according to power, the time value of output rated power and IGBT break-make is with one one correspondence, in the primary control program of writing system.

Default power and IGBT service time tables of data in system, and 1 corresponding service time Δ T1 of unit of programmable button counter increase and decrease;

Enter production test and enter following steps during the stage:

1, default power and IGBT service time tables of data, and the corresponding time of service time Δ T1 of 1 unit of programmable button counter increase and decrease;

2, start first complete machine, the ingoing power adjustment modes;

3, test out power P actual under the rated voltage with the power testing tool _Actual.IGBT service time this moment is T;

4, compare P _ActualWith P _SpecifiedBetween size; If P _Actual＜P _Specified, then press counter and " add " key and once increase simultaneously a service time Δ T1 of unit, this moment service time T _Actual=T+ Δ T1; Repeating step D compares real power and rated power again; The T value is generally between 1uS ~ 50uS.

If 5 P still _Actual＜P _SpecifiedPress once " adding " key, service time increases Δ T1 more again, at this moment service time T _Actual=T+2 Δ T1, the like until real power equals or near rated power.If P _Actual﹥ P _SpecifiedThen press " subtracting " key, if the mode of " adding " key is until real power equals or near rated power, multiplicity is n; Then preserve the service time Δ T=n Δ T1 that needs adjustment.

6, again start complete machine, enter step D, E after, the time value Δ T Modulating Power of transferring required adjustment according to the key-press status of preserving the IGBT of reality in service time volume export specified power P for increasing Δ T _Specified

After final assembly is finished when power detects the power of every complete machine difference to some extent all, under specific operator scheme, add, subtract the width of revision IGBT gating pulse by operation push-button, after power reaches requirement, the revision amount is stored.The revision amount that reads storage when in use at every turn starting shooting compensates in original IGBT gating pulse width, to reach the different complete machine power differences of compensation, to satisfy the conforming requirement of product power of dispatching from the factory.This mode is adapted to the product that control panel needs in advance sealing to assemble in the assembling process.

Such as Fig. 2, the AD that partly increases by one road fixed resistance and adjustable resistance dividing potential drop at the display operation control circuit detects the loop.When in power detection, change the AD value that MCU detects by the resistance of regulating this AD loop, when AD value increase and decrease certain value, just IGBT gating pulse width is done corresponding increase and decrease to reach the purpose of Modulating Power.Control MCU detects the AD value in this loop at every turn before opening IGBT heating, in range of set value, think not need to compensate when this value and control width, when detected value and initial set value differ a certain amount of, just to the control width of IGBT to corresponding plus-minus.Initial set value can be adjusted when producing circuit board, so that the AD value in this loop of finished circuit board is all in setting range.This mode is fit to finish the product that the last capping of meeting shows with the circuit board assembling.

Claims

1. the complete machine power regulating method of an electric heating appliance is characterized in that: make real output P by the service time of adjusting IGBT _ActualEqual rated power P _Specified, comprise the steps:

2. the complete machine power regulating method of electric heating appliance according to claim 1, it is characterized in that: the described preset data of step 1 comprises:

Default rated power and IGBT service time tables of data;

3. the complete machine power regulating method of electric heating appliance according to claim 2 is characterized in that: described step 2 is by control IGBT service time T control IGBT pulse width.

4. the complete machine power regulating method of electric heating appliance according to claim 2, it is characterized in that: the described Modulating Power of step 2 comprises:

Start first complete machine, the ingoing power adjustment modes;

5. the complete machine power regulating method of electric heating appliance according to claim 4 is characterized in that: the service time Δ T=n Δ T1 that step 3 preservation needs are adjusted.

6. the complete machine power regulating method of electric heating appliance according to claim 4 is characterized in that: the T value is between 1uS ~ 50uS.

7. the complete machine power regulating method of electric heating appliance according to claim 1, it is characterized in that: the described preset data of step 1 comprises:

Adjust the AD value of bleeder circuit;

8. the complete machine power regulating method of electric heating appliance according to claim 7 is characterized in that: described step 2 is to control the pulse width of IGBT by the AD value of adjusting the control bleeder circuit.

9. the complete machine power regulating method of electric heating appliance according to claim 7, it is characterized in that: the described Modulating Power of step 2 comprises:

Start first complete machine, the ingoing power adjustment modes;

Compare P _ActualWith P _SpecifiedBetween size; If P _Actual＜P _Specified, then increase the AD value in AD loop, to P _Actual=P _SpecifiedIf P _ActualP _Specified, then reduce the AD value in AD loop to P _Actual=P _Specified