CurrentLoopSetup Parameter
Default Value: 0
Minimum Value: None
Maximum Value: None
Units: None
Type: int
Parameter Settings and Values
This table shows the value of the configuration for the parameter setting.
Table: Parameter Settings, Configurations, and Values
| Setting | Configurations | Value |
|---|---|---|
| Current Loop Gains | Setting 0 | 0x00000000 |
| Setting 1 | 0x00000001 | |
| Setting 2 | 0x00000002 | |
| Setting 3 | 0x00000003 | |
| Setting 4 | 0x00000004 | |
| Setting 5 | 0x00000005 | |
| Setting 6 | 0x00000006 | |
| Setting 7 | 0x00000007 | |
| Use Space Vector Modulation | Disabled | 0x00000008 |
| Enabled | 0x00000000 | |
| Use High Resolution Feedback | Disabled | 0x00000000 |
| Enabled | 0x00000010 | |
| Optimize Amplifier Deadtime | Disabled | 0x00000000 |
| Enabled | 0x00000020 | |
| Use Feedforward | Disabled | 0x00000000 |
| Enabled | 0x00000040 |
The CurrentLoopSetup parameter configures settings related to the current loop. The sections that follow give the possible settings for this parameter.
Current Loop Gains
HARDWARE: This setting applies only when used with the GL4 or the XL4s.
This setting specifies the current loop gains that the drive uses for the analog current loop.
Setting 0 is the default. One of these operations occurs based on the drive type that you are using.
Table: Setting 0 Operations
| Drive | Operation |
|---|---|
|
GL4 |
Configures its current loop gains to control the AVG-10, AVG-14, or AVG-20 galvo scanner. |
|
XL4s |
Configures its current loop gains to control the TLG-4000 stage. |
When you select Setting 1, one of these operations occurs based on the drive type that you are using.
Table: Setting 1 Operations
| Drive | Operation |
|---|---|
|
GL4 |
Configures its current loop gains to control the AVG-30 galvo scanner. |
IMPORTANT: Do not change the other settings unless a person from Aerotech gives you instructions.
Use Space Vector Modulation
HARDWARE: This setting does not apply when used with the GI4, GL4, SI4, iXI4, XI4, or the XL4s.
This setting specifies the modulation that the digital current loop uses to calculate the voltage command that operates an AC brushless motor. If you use space vector modulation, it improves the drive performance by increasing the DC bus utilization and by decreasing the total harmonic distortion (THD).
Disabled is the default. The digital current loop uses sinusoidal modulation to calculate the voltage command.
When you select Enabled, the digital current loop uses space vector modulation to calculate the voltage command.
Use High Resolution Feedback
HARDWARE: This setting applies only when used with the iXC4e or the XC4e.
This setting specifies the type of resolution that the digital current loop uses for the current feedback sensors. It can use standard resolution or use more hardware to improve the resolution of these sensors.
Disabled is the default. The digital current loop uses standard resolution for the current feedback device when the drive outputs any quantity of current.
When you select Enabled, the digital current loop improves the current feedback resolution when the drive outputs a quantity of current that is below an internally-defined level.
For Example
If you enable this setting, the performance of the drive improves when the drive outputs a low quantity of current. As a result, this setting gives you better in-position stability.
Optimize Amplifier Deadtime
HARDWARE: This setting applies only to the drives and configurations that follow:
Table: Applicable Drive Types and Configurations
| PWM Drive Type | Drive Configurations |
|---|---|
| FLEX | All |
| iXA4 | With -AC option |
| XA4 | With -AC option |
| iXC2 | All |
| XC2 | All |
| iXC2e | All |
| XC2e | All |
| iXC4 | All |
| XC4 | All |
| iXC4e | All |
| XC4e | All |
| iXC6e | With -240V option |
| XC6e | With -240V option |
| iXR3 | Using an -XSP3 amplifier |
| XR3 | Using an -XSP3 amplifier |
Set this to Enabled to optimize the switching performance of the PWM amplifier.
Before Automation1 version 2.9.0, Disabled was the default setting for some systems. If there is a negative effect on the operation or performance of your system when you change this setting to Enabled, set it back to Disabled.
Use Feedforward
IMPORTANT: Do not change this setting unless a person from Aerotech gives you instructions.
To see the structure of the digital current loop, refer to Digital Current Loop Block Diagram.
