I. Pêşpeyvên Sêdeme
(1) Bînin bêje di motoreya sêdimek û convertera AC/DC de
Motoreya sêdimek
Motoreyên sêdimek hene pêşve û rengi delta. Pêşveka x, y û z bi daweyên sê setan de windings tê gotin, li ser cihê rêkezê nûsreyek neutral da çêkirin, û sê xettan ji berê din windings tê gotin bi A, b û c hatine çêkirin, ku sistemê sêdimek û sê xetê were form kirin; rengi delta li ser cihê rêkezê nûsreya power supply an load bi rastîne, bê nûsreyek neutral, ku sistemê sêdimek û sê xetê ye, bi xetek ground û sêdimek û sê xetê were form kirin. Rengên din werin biguherînin operaçonên motore, ji ber vê lê zorik e ku li pir wek rengê motore ya bike tevlê bikin lê zelbike convertera AC/DC.
Convertera AC/DC
Convertera AC/DC element ek e ku bihêza alternating current voltage bibêje direct current voltage. Metodên çend ên common in transformer method û switch method. Transformer method di navbera dike alternating current voltage bi transformer bike, bi diode bridge rectifier full-wave rectify bike, û bi capacitor output direct current voltage smooth bike; switch method dike diode bridge rectification, capacitor smoothing, bi ON/OFF switch elements direct current voltage chop bike, û bi operations û voltage reduction bi high-frequency transformer, bi feedback control bihêza stable direct current output.
(II) Parameters Equipment dikirin
Parameters Motoreya Sêdimek
Zorik e ku parameters rated voltage, rated power, rated current û dinan parameters motoreya sêdimek dikirin. Mînwe, rated voltage baseyek important e ku bihêza output direct current voltage convertera AC/DC bêtir bike. Ji ber vê yekem, ger rated voltage motore 380V (alternating current voltage sêdimek) be, ewa output direct current voltage convertera AC/DC divê requirements start-up û operaçon motore bêtir bike.
Parameters Convertera AC/DC
Zorik e ku input voltage range convertera AC/DC (mînwe line voltage range ji bo input three-phase AC), output voltage, output current û dinan parameters dikirin. Mînwe, output voltage divê match be rated voltage motoreya sêdimek, û output current divê running current requirements motore bêtir bike.
II. Steps Connection
(1) Connect three-phase power to the AC/DC converter
Three-phase Power Terminal
Ji bo three-phase four-wire power supply, bêrîn bêtir bixin lêser L1, L2, L3 û neutral line (N). Ji bo three-phase three-wire power supply, tenê sê phase lines hene.
AC/DC Converter Input
Li ser wiring labels convertera AC/DC, connect phase lines three-phase power supply to three-phase input terminals convertera AC/DC. Hin convertera AC/DC dibayê specific phase sequence connections, ji ber vê piştre manual device bikin.
(II) Connect the AC/DC converter to the three-phase motor.
AC/DC Converter Output
Determine positive û negative terminals DC output convertera AC/DC.
Three-phase Motor Connection
Connect positive terminal DC output convertera AC/DC to one end of winding three-phase motor (mînwe, starting end A-phase winding), û negative terminal to other end that winding or to common terminal motor (if available). Ji bo multi-winding motor, connect other windings to output terminals convertera AC/DC in sequence according to motor's wiring diagram û design requirements.
III. Inspection after Connection
(I) Check for Firm Connection
Check all connecting wires from three-phase power to AC/DC converter and from AC/DC converter to three-phase motor to ensure they are firmly connected û there are no loose terminal connections.
Check if connections at wire joints are tightened to avoid overheating û sparking due to poor contact.
(II) Electrical Parameter Inspection
Use measuring tools such as multimeters to check if input voltage AC/DC converter is within normal range û whether three-phase voltages are balanced.
Measure output direct current voltage AC/DC converter to ensure it meets requirements three-phase motor, û check for short circuits û open circuits in output.
(III) Equipment Start-up Test
After ensuring previous inspection is correct, power on AC/DC converter first, observe its working status, such as whether indicator lights are normally lit, whether there are alarm sounds, etc.
Then start three-phase motor û observe its operation, including whether it starts normally, whether there are abnormal vibrations û noises during operation, etc. If any abnormality found, immediately stop equipment û re-check connections û equipment parameters.
