Mice cage style motor
• Direct Start
• Y / -start
• Auto transformer starter
Traditional Motor start method
• Current • (Torque)
Direct Start
mo
tor
cu
rre
nt
speed
In
6-10 x In
100% N
X (
In)
mo
tor
torq
ue
speed 100% N
2.5
1
Acceleration Torque
Superabundance starting current
Direct start torqueload torqueAcceleration Torque
Y / Start
• Low cost/Simple to Operation
• Constant Torque running
• Switch Peak value
• Six line operation
Y / Start
contactor
Motor Over Load
U1
V1
W1
L1
L2
L3
Connect insulator
Fuse
W2
U2
V2
contactor Y contactor
Y / Start† Y (Current) † Y (Torque)
switch peak value(hight to 20xIn)
Superabundance start current
Mo
tor
cu
rre
nt
speed 100% N
6-10 x In
In
X (
In)
mo
tor
torq
ue
speed 100% N
2.5
1
TorqueY TorqueLoad torquesurplus speed torque
0.66
Auto transformer starter
• Difficult to Design
• Bulky
• Expensive
• One-time use only
• High cost for repeated uses
Auto transformer starter
Motor overload motor
(Y/ connection)
L1,L2, L3
Connect insulator
Fuse
contactor
Auto transformer starter
K1K2K3
• Torque
Auto transformer star
• Current
Mo
tor
cu
rre
nt
speed 100% N
6-10 x In
X (
In)
mo
tor
torq
ue
speed 100% N
2.5
0.66
motor torqueload torquepace speed up
In