NR cat. gen. 002/003 - NBC Group Ltd

Formule
tecniche
Tab. 43
110
NERI MOTORI
HI-TECH IN ELECTRIC MOTORS
• Corrente assorbita in linea
Absorbed line current
Courant absorbé en ligne
Leitungsstromaufnahme
• Coppia nominale
Rated torque
Couple nominal
Nennmoment
• Potenza termicamente
equivalente in servizio
intermittente
Thermally equivalent power in
intermittent duty
Puissance thermiquement
équivalent en service intermittent
Effektive Wärmeleistung im
• Potenza apparente
Apparent power
Puissance apparente
Scheinleistung
• Energia
Energy
Energie
Energie
• Livello di pressione sonora
Sound pressure level
Niveau de pression acoustique
Schalldruckpegel
L PA = 20 • Ig ( P ) [dB]
P 0
P = pressione sonora
= noise pressure level
= pression acoustique
= Schalldruck
P0
= 2 • 10 -5 N/m 2 (soglia di udibilità)
= 2 • 10 -5 N/m 2 (threshold of
audibility)
= 2 • 10 -5 N/m 2 (seuil d’audibilité)
= 2 • 10 -5 N/m 2
(Hörbarkeitsschwelle)
Technical
formulas
IL =
• Momento di inerzia per simmetria cilindrica
Inertia moment for cylindrical symmetry
Moment d’inertie pour symétrie cylindrique
Trägkeitsmoment für Zylindersymmetrie
• Tempo di avviamento
Starting time
Temps de démarrage
Anlaufzeit
Pn
3⋅V ⋅η⋅COSϕ [A]
n
C = P ω Nm [ ] (M = 0,975 ) ⋅ P n n
n
n
t = J ( m + JL
)⋅ω [s]
C
(dove / where / où / wobei C = CMm - CRm )
(t =
2
( PD M + PD )
2
L
• Livello di potenza sonora
Sound power level
Niveau de puissance acoustique
Schalleistungspegel
LWA = LP + 10 • Ig ( S e
) [dB]
S
0
S e
= superficie effettiva di misura
= measure efffective surface
= surface effective de mesure
= Effektiv gemessene Fläche
S0 = 1m = Superficie di riferimento
= reference surface
= surface de référence
= Bezugsfläche
Formules
techniques
Pt = P 2 2 2
1 ⋅ t 1+P2 ⋅ t 2+ P4 t 4
t 1+ t 2+ t 4 + t 3 /4 W [ ]
IL
IL
la formula è valida per:
the following formula is used:
la formule est valable pour:
Die Formel gilt für:
⋅n
) [s]
375 ⋅ M
A = 3 ⋅Vn⋅I L ⋅[ VA ]
E = P ⋅ t [ J ] n
C
IL
IL
V
V
• Ampiezza di vibrazione
Vibration amplitude
Amplitude de vibration
Schwingungsamplitude
S = 2 • V eff [mm]
2 • π • f
n
CM m
CR m
n
n
ω =
CM
CR
V eff = velocità di vibrazione
= vibration speed
= vitesse de vibration
= Schwingungsgeschwindigkeit
f = frequenza di vibrazione
considerata
= considered vibration frequency
= fréquence de vibration
considérée
= Frequenz der betrachteten
Schwingung
Technische
Formeln
S.I. [ ] S.I. = Sistema Internazionale
International System
S.T. ( ) S.T. = Sistema Tecnico
Technical System
Unità di misura
Units of measure
Unité de mesure
Maßeinheit
2 ⋅ π ⋅ n
60
S
nb
[rad/s]
S
n
Pn = [W]
Vn = [V]
η = rendimento
Aussetzbetrieb t1 t2 t3 t4
0,3 ⋅P n ≤ P 1,2,4 ≤ 1,5 ⋅P n
P = [N/m2] S = [m2] V = [m-3/s] f = [s-1] [SEC]
J = (1/2) ⋅ M ⋅ R2 M = [kg] (massa • mass • masse • Masse)
R = [m] (raggio• radius • rayon • Radius)
[W]
P1
P2
P4
J = [kg ⋅ m2]
M = [kg ⋅ m]
n = [min -1 ]
PD2 = [kg ⋅ m2]
t