6 Commissioning

Issue 10/06

6.4.17Field-orientated control

Limitations

To avoid a premature limitation the limits of the torque (P1520, P1521) and power (P1530, P1531) should be set to the maximum value, if the application allows it.

p0640 = ...

Motor overload factor [%]

150.0 %

Defines motor overload current limit in [%] relative to p0305 (rated motor current). Limited to maximum inverter current or to 400 % of rated motor current (p0305), whichever is the lower.

p0640max = min (r0209, 4 p0305) 100 p0305

P1520 = ...

P1521 = ...

CO: Upper torque limit FC-spec.

Specifies fixed value for upper torque limitation.

P1520 def =

1.5 r0333

P1520 max =

± 4 r0333

CO: Lower torque limit FC-spec.

Enters fixed value of lower torque limitation.

P1521def =

1.5 r0333

P1521max =

± 4 r0333

Resultant

 

 

 

torque limit

 

 

 

M

Power

Stall

 

 

 

limitation

limitation

 

 

 

 

 

Torque limitation

 

r1526

~ 1

~ 1

 

 

r1527

f

f2

 

 

 

 

 

 

 

p1530

 

 

 

 

p1531

 

 

 

 

 

 

fact

 

Constant

Constant

fstall

Stall

 

torque

power

 

power

P1530 = ...

P1531 = ...

Motoring power limitation

FC-spec.

Defines fixed value for the max. permissible motoring active power.

P1530 def = 2.5 P0307

P1530 max = 3 P0307

Regenerative power limitation FC-spec.

Enters fixed value for the max. permissible regenerative active power

P1531def = - 2.5 P0307

P1531max = - 3 P0307

Power limitation (motoring, regenerative)

M =

P

M

 

2 ⋅ π ⋅ f

 

 

 

p1530

 

p1531

 

 

 

f

 

p1530

p1531

 

 

50

MICROMASTER 440

Operating Instructions (Compact)

Page 50
Image 50
Siemens 440 operating instructions Field-orientated control, Limitations