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Stepper Permanent Magnet

Permanent magnet stepper motor

 

Description

Equations

Connections

Parameters

Description

The Stepper Permanent Magnet (or Stepper Motor PM) component models a two-phase permanent magnet stepper machine. The winding resistances and inductances of the two phase windings are identical. The losses in the winding resistances only are taken into account; saturation is not modeled.

Equations

Jω.+Bω=KmiasinNrθ+KmibcosNrθτ

Lia.+Ria=vapvan+KmωsinNrθ

Lib.+Rib=vbpvbnKmωcosNrθ

ω=θ.

ia=iap=ian

ib=ibp=ibn

θ=φrflange

τ=τrflange

Connections

Name

Description

Modelica ID

negpina

Negative pin winding a

neg_pin_a

pospina

Positive pin winding a

pos_pin_a

negpinb

Negative pin winding b

neg_pin_b

pospinb

Positive pin winding b

pos_pin_b

rflange

Shaft end

rflange

Parameters

Name

Default

Units

Description

Modelica ID

J

0.005

kgm2

Rotor moment of inertia

J

B

0.08

Nmsrad

Rotor damping

B

R

1.55

Ω

Winding resistance

R

L

0.015

H

Winding inductance

L

Km

0.19

NmA

Machine torque constant

Km

Nr

50

1

Number of rotor teeth

Nr

See Also

Electrical Library

Electrical Machines

Electrical Machines Stepper Machines