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Parameter x.00
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description format
Advanced parameter
descriptions
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Electronic
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Performance
RFC mode
20
Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
MOTOR1_CURRENT_LIMIT_MAX
[1000.0%]
Maximum current limit settings for motor map 1
This maximum current limit setting is the maximum applied to the current limit parameters in motor map 1.
Open Loop
Where:
The Maximum current is either (1.5 x Kc) when the rated current set in Pr
5.07
is less than or equal to the
maximum Heavy Duty current rating given by Pr
11.32
, otherwise it is (1.1 x Normal Duty rating).
Motor rated current is given by Pr
5.07
PF is motor rated power factor given by Pr
5.10
Closed Loop Vector
Where:
The Maximum current is either (1.75 x Kc) when the rated current set in Pr
5.07
is less than or equal to the
maximum Heavy Duty current rating given by Pr
11.32
, otherwise it is (1.1 x Normal Duty rating).
Motor rated current is given by Pr
5.07
ϕ
1 = cos-1(PF) -
ϕ
2. This is measured by the drive during an autotune. See section 5.6.2
on page 90 for more information regarding
ϕ
2.
PF is motor rated power factor given by Pr
5.10
Servo
Where:
Maximum current is drive rated current (Pr
11.32
) x 1.75
Motor rated current is given by Pr
5.07
MOTOR2_CURRENT_LIMIT_MAX
[1000.0%]
Maximum current limit settings for motor map 2
This maximum current limit setting is the maximum applied to the current limit parameters in motor map 2.
The formulae for MOTOR2_CURRENT_LIMIT_MAX are the same for MOTOR1_CURRENT_LIMIT_MAX
except that Pr
5.07
is replaced with Pr
21.07
and Pr
5.10
is replaced with Pr
21.10
.
TORQUE_PROD_CURRENT_MAX
[1000.0%]
Maximum torque producing current
This is used as a maximum for torque and torque producing current parameters. It is
MOTOR1_CURRENT_LIMIT_MAX or MOTOR2_CURRENT_LIMIT_MAX depending on which motor map is
currently active.
USER_CURRENT_MAX
[1000.0%]
Current parameter limit selected by the user
The user can select a maximum for Pr
4.08
(torque reference) and Pr
4.20
(percentage load) to give suitable
scaling for analog I/O with Pr
4.24
. This maximum is subject to a limit of MOTOR1_CURRENT_LIMIT_MAX.
or MOTOR2_CURRENT_LIMIT_MAX depending on which motor map is currently active.
USER_CURRENT_MAX = Pr
4.24
REGEN_REACTIVE_MAX
Reactive current limit in regen mode
The drive applies a limit to the reactive current reference in regen mode to limit the total current to
DRIVE_CURRENT_MAX.
Where:
Kc is given in Table 4-2 on page 22.
Regen unit rated current is given by Pr
5.07
AC_VOLTAGE_SET_MAX
[690V]
Maximum output voltage set-point
Defines the maximum motor voltage that can be selected.
200V drives: 240V, 400V drives: 480V
575V drives: 575V, 690V drives: 690V
Maximum
Definition
Maximum
current limit
√[
[
Maximum current
]
2
+ PF
2
- 1
]
x 100%
=
Motor rated current
PF
Maximum
current limit
√[
[
Maximum current
]
2
+ cos(
ϕ
1
)
2
- 1
]
x 100%
=
Motor rated current
cos(
ϕ
1
)
Maximum
current limit
=
[
Maximum current
]
x 100%
Motor rated current
REGEN_REACTIVE_MAX
Kc 1.75
×
Regen unit rated current
---------------------------------------------------------------------
⎝
⎠
⎛
⎞
2
Pr 4.07
100
-------------------
2
–
⎝
⎠
⎛
⎞
100%
×
=
Summary of Contents for unidrive sp
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