Analysis and Selection of Power Adjustment Scheme for Kuchetsa Kutentha Kwamoto

Popeza panthawi yotenthetsera induction, magawo ofanana ndi katundu asintha ndi kutentha ndi kusungunuka kwa charger ndi zofunikira zotenthetsera, magetsi otenthetsera otenthetsera amayenera kusintha mphamvu ya katunduyo. Popeza ma inverters amtundu wa resonant ali ndi njira zambiri zosinthira mphamvu, tiyenera kupanga zisankho zoyenera pakupanga chitukuko molingana ndi ntchito zenizeni komanso zofunikira pakuchita.

The power adjustment methods of the system can be generally divided into two types: DC side power adjustment and inverter side power adjustment.

Lamulo lamagetsi am’mbali la DC ndikuwongolera mphamvu yotulutsa inverter posintha makulidwe amagetsi olowera a ulalo wamagetsi pamagetsi a DC mbali ya inverter, ndiye kuti, njira yoyendetsera magetsi yamagetsi (PAM). Mwanjira iyi, katunduyo amatha kuyendetsedwa pa resonance kapena pafupipafupi yogwira ntchito pafupi ndi resonance kudzera mumiyeso yotseka.

There are two ways to adjust the output voltage of the induction heating furnace: phase-controlled rectification or uncontrolled rectification followed by chopping.

Inverter mbali mphamvu malamulo ndi kusintha linanena bungwe ntchito boma la inverter ndi kulamulira makhalidwe kusintha kwa zipangizo mphamvu ya inverter kugwirizana mu muyeso inverter, kuti azindikire lamulo la mphamvu linanena bungwe la inverter.

Ma inverter side power modulation amatha kugawidwa mu pulse frequency modulation (PFM), pulse density modulation (PDM), ndi pulse phase shift modulation. Njira yosinthira mphamvu ya inverter ikakhazikitsidwa, kuwongolera kosalamulirika kungagwiritsidwe ntchito mbali ya DC, yomwe imathandizira ng’anjo yowotchera yowotchera ndikuwongolera mphamvu zonse za grid-mbali. Panthawi imodzimodziyo, liwiro la kuyankha kwa kusintha kwa mphamvu ya inverter ndilothamanga kuposa la mbali ya DC.

Kuwongolera koyendetsedwa ndi gawo ndikuwongolera mphamvu kutenthetsa ng’anjo ndikosavuta komanso kokhwima, ndipo kuwongolera ndikosavuta; mphamvu ndi kudalirika kwa magetsi opangira magetsi opangira magetsi kudzachepetsedwa muzochitika zamphamvu kwambiri, ndipo sizoyenera kugwira ntchito yachibadwa ya magetsi. Kusintha kwafupipafupi kwa pulse kudzakhala ndi chikoka chachikulu pa chowotchera chotenthetsera chifukwa cha kusintha kwafupipafupi panthawi ya kusintha kwa mphamvu; kusinthasintha kwa pulse density kumapangitsa kuti pakhale kusakhazikika kogwira ntchito pamagetsi otsekedwa, ndipo kumapereka njira yosinthira mphamvu; Kusintha kwa mphamvu ya pulse phase shifting kudzawonjezera kutayika kwa mphamvu, monga kugwiritsa ntchito masiwichi ofewa, kumawonjezera zovuta za ng’anjo yotenthetsera.

Combining the advantages and disadvantages of these five power adjustment methods, combined with the work of this subject in high-power situations, choose to use thyristor phase-controlled rectification for power adjustment, and obtain the variable DC output voltage supply inverter link by adjusting the thyristor conduction angle. Thereby changing the output power of the inverter link. This kind of power adjustment method of induction heating furnace is simple and mature, and the control is convenient.