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