Menu 5 − Regen Status

Mode: Regeneration


Parameter05.001  Output Frequency
Short descriptionDisplays the value of the supply frequency
ModeRegeneration
Minimum-200.0Maximum200.0
Default UnitsHz
Type32 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places1
CodingRO, FI, ND, NC, PT

The Output Frequency (05.001) is a measure of the supply frequency. If the frequency shown is positive it indicates that the supply phase sequence is U-V-W. If it is negative it indicates that the supply phase sequence is W-V-U.


Parameter05.002  Output Voltage
Short descriptionDisplays the r.m.s. line to line voltage at the a.c. terminals of the drive
ModeRegeneration
Minimum−VM_AC_VOLTAGEMaximumVM_AC_VOLTAGE
Default UnitsV
Type16 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places0
CodingRO, FI, VM, ND, NC, PT

The Output Voltage (05.002) is the r.m.s. line to line voltage at the a.c. terminals of the drive.


Parameter05.003  Output Power
Short descriptionDisplays the power flowing via the a.c. terminals of the drive
ModeRegeneration
Minimum−VM_POWERMaximumVM_POWER
Default UnitskW
Type32 Bit VolatileUpdate Rate4ms write
Display FormatStandardDecimal Places3
CodingRO, FI, VM, ND, NC, PT

The Output Power (05.003) is the power flowing via the a.c. terminals of the drive. The power is derived as the dot product of the output voltage and current vectors, and so this is correct even if the motor parameters are incorrect and the motor model does not align the reference frame with the flux axis of a motor in RFC-A mode. For Open-loop, RFC-A and RFC-S modes a positive value of power indicates power flowing from the drive to motor. For Regen mode a positive value of power indicates power flowing from the supply to the regen drive.


Parameter05.005  D.c. Bus Voltage
Short descriptionDisplays the voltage across the d.c. link of the drive
ModeRegeneration
Minimum−VM_DC_VOLTAGEMaximumVM_DC_VOLTAGE
Default UnitsV
Type16 Bit VolatileUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRO, FI, VM, ND, NC, PT

D.c. Bus Voltage (05.005) gives the voltage across the d.c. link of the drive.


Parameter05.007  Rated Current
Short descriptionSet to the rated current rated of the regen inductor
ModeRegeneration
Minimum−VM_RATED_CURRENTMaximumVM_RATED_CURRENT
Default0.000UnitsA
Type32 Bit User SaveUpdate RateBackground read
Display FormatStandardDecimal Places3
CodingRW, VM, RA

Rated Current (05.007) is used to define rated operating conditions for regen inductor thermal protection. See Inductor Thermal Time Constant (04.015).


Parameter05.018  Maximum Switching Frequency
Short descriptionDefines the maximum switching frequency that can be used by the drive
ModeRegeneration
Minimum0MaximumVM_SWITCHING_FREQUENCY
Default1UnitskHz
Type8 Bit User SaveUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRW, TE, VM, RA

ValueText
02
13
24
36
48
512
616

Maximum Switching Frequency (05.018) should be set to the required PWM switching frequency. The drive inverter will operate at this frequency unless the inverter temperature becomes too hot. Under these conditions the drive will reduce the switching frequency in an attempt to avoid tripping  (see Auto-switching Frequency Change (05.035) ). 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.

Task
Speed controller (RFC-A, RFC-S) 250μs
D.c. link voltage controller 1ms
Flux controller (RFC-A, RFC-S) 1ms


Parameter05.023  D.c. Bus Voltage High Range
Short descriptionDisplays the d.c. bus level but with a higher range
ModeRegeneration
Minimum−VM_HIGH_DC_VOLTAGEMaximumVM_HIGH_DC_VOLTAGE
Default UnitsV
Type16 Bit VolatileUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRO, FI, VM, ND, NC, PT

D.c. Bus Voltage High Range (05.023) provides voltage feedback that has lower resolution and a higher range than D.c. Bus Voltage (05.005), and so it is possible to determine the d.c. link voltage even if this exceeds the level of the over-voltage trip. It should be noted that due to tolerances, D.c. Bus Voltage High Range (05.023) may not correspond exactly with the level given by D.c. Bus Voltage (05.005). In a system with parallel power modules where the control pod is remote from any of the power modules, this parameter always shows zero.


Parameter05.035  Auto-switching Frequency Change
Short descriptionDefines auto-switching frequency control with thermal model
ModeRegeneration
Minimum0Maximum2
Default0Units 
Type8 Bit User SaveUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRW, TE

ValueText
0Enabled
1Disabled
2No 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.


Parameter05.036  Auto-switching Frequency Step Size
Short descriptionAuto-switching frequency redcution step size
ModeRegeneration
Minimum1Maximum2
Default2Units 
Type8 Bit User SaveUpdate RateBackground read
Display FormatStandardDecimal Places0
CodingRW

See Auto-switching Frequency Change (05.035).


Parameter05.037  Switching Frequency
Short descriptionDisplays the current switching frequency used by the drive
ModeRegeneration
Minimum0Maximum6
Default UnitskHz
Type8 Bit VolatileUpdate RateBackground write
Display FormatStandardDecimal Places0
CodingRO, TE, ND, NC, PT

ValueText
02
13
24
36
48
512
616

Shows the actual inverter switching frequency after the auto-change function.


Parameter05.038  Minimum Switching Frequency
Short descriptionMinuimum Switching Frequency
ModeRegeneration
Minimum0MaximumVM_MIN_SWITCHING_FREQUENCY
Default1UnitskHz
Type8 Bit User SaveUpdate RateBackground Read
Display FormatStandardDecimal Places0
CodingRW, TE, VM

ValueText
02
13
24
36
48
512
616

See Auto-switching Frequency Change (05.035).


Parameter05.039  Maximum Inverter Temperature Ripple
Short descriptionMaximum Inverter Temperature Ripple
ModeRegeneration
Minimum20Maximum60
Default60Units°C
Type8 Bit User SaveUpdate RateBackground Read
Display FormatStandardDecimal Places0
CodingRW

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).