Control Techniques Mentor MP

Menu 5
Parameter
structure
Keypad and
display
Parameter x.00
Parameter
description format
Advanced parameter
descriptions
Serial comms
protocol
Performance
94 Mentor MP Advanced User Guide
www.controltechniques.com Issue Number: 4
Figure 5-18 Field reversal
Figure 5-19 Field reversal state machine
Armature voltage Q2
Field Flux
Forward Reverse
Zero speed flag
Final Speed Reference
Speed Controller Output
Invert Flux Demand
Forward
Invert Speed Error
R
e
f
n
e
g
a
t
i
v
e
Zero speed det ected
F
l
u
x
<
-
t
h
r
e
s
h
o
l
d
R
e
f
>
0
Zero speed det ected
F
l
u
x
>
t
h
r
e
s
h
o
l
d
R
e
f
p
o
s
i
t
i
v
e
R
e
f
p
o
s
i
t
i
v
e
R
e
f
n
e
g
a
t
i
v
e
R
e
f
n
e
g
a
t
i
v
e
Wait for negative flux level
Entry / Set flux invert
Wait for positive flux level
Entry / Clear flux invert
Running Forward
Entry / Clear invert
speed error
Running Reverse
Entry / Set invert speed
error
Wait for Zero Speed forward
Wait for Zero Speed reverse