Parameter 05.035 Auto-switching Frequency Change
Short description Defines auto-switching frequency control with thermal model
Mode Open‑Loop
Minimum 0 Maximum 2
Default 0 Units
Type 8 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW, TE
Value Text
0 Enabled
1 Disabled
2 No Ripple Detect
The drive inverter can be damaged if the temperature is too high. The inverter can also be damaged or the lifetime of the power devices reduced, if the temperature ripple of the devices is too high. Auto-switching Frequency Change
(05.035) defines the action taken if the drive inverter becomes too hot or the temperature ripple becomes too high.
Enabled:
If the inverter becomes too hot or the ripple temperature is higher than the level defined by Maximum Inverter Temperature Ripple (05.039) the switching frequency is reduced in an attempt to prevent tripping.
Disabled:
The switching frequency is not reduced, and so the drive will trip if the inverter is too hot or the temperature ripple is too high.
No Ripple Detect:
The switching frequency is reduced if the inverter temperature, but not the temperature ripple is too high. If the temperature ripple exceeds the level defined by Maximum Inverter Temperature Ripple (05.039) then the drive will trip.
The switching frequency is changed in steps defined by Auto-switching Frequency Step Size (05.036). For example with a switching frequency of 16kHz and a step size of two, the frequency will be reduced to 8kHz, then 4kHz etc.
Minimum Switching Frequency (05.038) defines the minimum switching frequency that the system will attempt to use. If the switching frequency needs to switch to a lower level, then the drive will trip.
If Minimum Switching Frequency is changed the new value will only become active when Switching Frequency is at or above the minimum value.
Parameter 05.036 Auto-switching Frequency Step Size
Short description Auto-switching frequency redcution step size
Mode Open‑Loop
Minimum 1 Maximum 2
Default 2 Units
Type 8 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW
See Auto-switching Frequency Change (05.035).
Parameter 05.037 Switching Frequency
Short description Displays the current switching frequency used by the drive
Mode Open‑Loop
Minimum 0 Maximum 6
Default Units kHz
Type 8 Bit Volatile Update Rate Background write
Display Format Standard Decimal Places 0
Coding RO, TE, ND, NC, PT
Value Text
0 2
1 3
2 4
3 6
4 8
5 12
6 16
Shows the actual inverter switching frequency after the auto-change function.
Parameter 05.038 Minimum Switching Frequency
Short description Minuimum Switching Frequency
Mode Open‑Loop
Minimum 0 Maximum VM_MIN_SWITCHING_FREQUENCY
Default 0 Units kHz
Type 8 Bit User Save Update Rate Background Read
Display Format Standard Decimal Places 0
Coding RW, TE, VM
Value Text
0 2
1 3
2 4
3 6
4 8
5 12
6 16
See Auto-switching Frequency Change (05.035).
Parameter 05.039 Maximum Inverter Temperature Ripple
Short description Maximum Inverter Temperature Ripple
Mode Open‑Loop
Minimum 20 Maximum 60
Default 60 Units °C
Type 8 Bit User Save Update Rate Background Read
Display Format Standard Decimal Places 0
Coding RW
Maximum Inverter Temperature Ripple (05.039) defines the maximum inverter temperature ripple allowed before the switching frequency is reduced. See Auto-switching Frequency Change (05.035).
Parameter 05.040 Spin Start Boost
Short description Defines the level of spin start boost used by the algorithm that detects the speed of a spinning motor
Mode Open‑Loop
Minimum 0.0 Maximum 10.0
Default 1.0 Units
Type 8 Bit User Save Update Rate Background Read
Display Format Standard Decimal Places 1
Coding RW
Spin Start Boost (05.040) is used by the algorithm that detects the speed of a spinning motor when the drive is enabled and Catch A Spinning Motor (06.009) ≥ 1. For most motors Spin Start Boost (05.040) does not need to be changed
from the default value, but for some larger motors Spin Start Boost (05.040) may need to be increased. If Spin Start Boost (05.040) is too small the drive will detect zero speed whatever the speed of the motor, and if Spin Start Boost
(05.040) is too large the motor may accelerate away from standstill when the drive is enabled.
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