The steady state parameters are converted to equivalent transient model parameters:
R
s
= R
1
L
m
= L
m
L
s
= L
1
+ L
m
L
r
= L
2
+ L
m
σL
s
= L
s
- (L
m
2
/ L
r
)
The equivalent drive parameters are:
Stator Resistance
(05.017) = R
s
Transient Inductance
(05.024) = σLs
Stator Inductance
(05.025) = L
s
Parameter
05.018
Maximum Switching Frequency
Short description
Defines the maximum switching frequency that can be used by the drive
Mode
Open
‑
loop
Minimum
0
Maximum
VM_MAX_SWITCHING_FREQUENCY
Default
3
Units
kHz
Type
8 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
0
Coding
RW, TE, VM, RA
Value
Text
Description
0
0.667
667Hz switching frequency
1
1
1kHz switching frequency
2
2
2kHz switching frequency
3
3
3kHz switching frequency
4
4
4kHz switching frequency
5
6
6kHz switching frequency
6
8
8kHz switching frequency
7
12
12kHz switching frequency
8
16
16kHz switching frequency
Maximum Switching Frequency
(05.018) should be set to the required PWM switching frequency. The drive inverter will operate at this frequency unless
Auto-
switching Frequency Change Disable
(05.035) = 0 and the inverter temperature exceeds the threshold for automatic switching frequency reduction (see
Inverter Temperature
(07.034)). The actual switching frequency is shown in
Switching Frequency
(05.037). The switching frequency has a direct effect on the
sample rate for the current controllers (see
Current Controller Kp Gain
(04.013)). All other control tasks are at a fixed rate of 1ms.
As default
Auto-switching Frequency Change Disable
(05.035) = 0 and the system described above is always active. If
Auto-
switching Frequency Change Disable
(05.035) = 1 then the automatic switching frequency changing system is disabled.
We recommend that a minimum ratio of 12:1 for the switching frequency compared to the maximum output frequency is used.
Parameter
05.019
High Stability Space Vector Modulation
Short description
Set to 1 to enable High Stability Space Vector Modulation
Mode
Open
‑
loop
Minimum
0
Maximum
1
Default
0
Units
Type
1 Bit User Save
Update Rate
Background read
Display Format
Standard
Decimal Places
0
Coding
RW
Unidrive M200 Parameter Reference Guide
Issue: 01.05.00.10
71
Summary of Contents for unidrive m200
Page 1: ...Parameter Reference Guide Unidrive M200 Open loop Mode Issue 01 05 00 10 ...
Page 30: ...30 Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 ...
Page 83: ...Enable logic Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 83 ...
Page 125: ...Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 125 ...
Page 145: ...Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 145 ...
Page 204: ...204 Unidrive M200 Parameter Reference Guide Issue 01 05 00 10 ...