Mode: Regeneration
| Parameter | 05.001 Output Frequency | ||
|---|---|---|---|
| Short description | Displays the value of the supply frequency | ||
| Mode | Regeneration | ||
| Minimum | -200.0 | Maximum | 200.0 |
| Default | Units | Hz | |
| Type | 32 Bit Volatile | Update Rate | 4ms write |
| Display Format | Standard | Decimal Places | 1 |
| Coding | RO, 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.
| Parameter | 05.002 Output Voltage | ||
|---|---|---|---|
| Short description | Displays the r.m.s. line to line voltage at the a.c. terminals of the drive | ||
| Mode | Regeneration | ||
| Minimum | −VM_AC_VOLTAGE | Maximum | VM_AC_VOLTAGE |
| Default | Units | V | |
| Type | 16 Bit Volatile | Update Rate | 4ms write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, 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.
| Parameter | 05.003 Output Power | ||
|---|---|---|---|
| Short description | Displays the power flowing via the a.c. terminals of the drive | ||
| Mode | Regeneration | ||
| Minimum | −VM_POWER | Maximum | VM_POWER |
| Default | Units | kW | |
| Type | 32 Bit Volatile | Update Rate | 4ms write |
| Display Format | Standard | Decimal Places | 3 |
| Coding | RO, 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.
| Parameter | 05.004 High Resolution Frequency | ||
|---|---|---|---|
| Short description | High resolution frequency. | ||
| Mode | Regeneration | ||
| Minimum | -200.00 | Maximum | 200.00 |
| Default | Units | Hz | |
| Type | 16 Bit Volatile | Update Rate | 4ms Write |
| Display Format | Standard | Decimal Places | 2 |
| Coding | RO, FI, ND, NC, PT | ||
The output frequency given in Output Frequency (05.001) has a resolution of 0.1Hz, but for some applications a higher resolution is required, and so High Resolution Frequency (05.004) is provided with a resolution of 0.01Hz. Both parameters have an update rate of 4ms, but a 16ms filter is included in the calculation of the value in High Resolution Frequency (05.004) to give a stable level in the parameter.
| Parameter | 05.005 D.c. Bus Voltage | ||
|---|---|---|---|
| Short description | Displays the voltage across the d.c. link of the drive | ||
| Mode | Regeneration | ||
| Minimum | −VM_DC_VOLTAGE | Maximum | VM_DC_VOLTAGE |
| Default | Units | V | |
| Type | 16 Bit Volatile | Update Rate | 4ms write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, FI, VM, ND, NC, PT | ||
D.c. Bus Voltage (05.005) gives the voltage across the d.c. link of the drive.
| Parameter | 05.007 Rated Current | ||
|---|---|---|---|
| Short description | Set to the rated current of the regen inductor | ||
| Mode | Regeneration | ||
| Minimum | −VM_RATED_CURRENT | Maximum | VM_RATED_CURRENT |
| Default | 0.000 | Units | A |
| Type | 32 Bit User Save | Update Rate | Background read |
| Display Format | Standard | Decimal Places | 3 |
| Coding | RW, VM | ||
Rated Current (05.007) is used to define rated operating conditions for regen inductor thermal protection. See Inductor Thermal Time Constant (04.015).
| Parameter | 05.018 Maximum Switching Frequency | ||
|---|---|---|---|
| Short description | Defines the maximum switching frequency that can be used by the drive | ||
| Mode | Regeneration | ||
| Minimum | 0 | Maximum | VM_SWITCHING_FREQUENCY |
| Default | 1 | 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 |
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 |
| Parameter | 05.023 D.c. Bus Voltage High Range | ||
|---|---|---|---|
| Short description | Displays the d.c. bus level but with a higher range | ||
| Mode | Regeneration | ||
| Minimum | −VM_HIGH_DC_VOLTAGE | Maximum | VM_HIGH_DC_VOLTAGE |
| Default | Units | V | |
| Type | 16 Bit Volatile | Update Rate | Background write |
| Display Format | Standard | Decimal Places | 0 |
| Coding | RO, 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.
| Parameter | 05.035 Auto-switching Frequency Change | ||
|---|---|---|---|
| Short description | Defines auto-switching frequency control with thermal model | ||
| Mode | Regeneration | ||
| 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. The inverter temperature is provided in Inverter Temperature (07.034).
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 on OHt Inverter.100 if the inverter is too hot or the temperature ripple is too high.
No Ripple Detect:
The switching frequency is only reduced if the inverter temperature is too high. If the temperature ripple exceeds the level defined by Maximum Inverter Temperature Ripple (05.039) then the switching frequency is not reduced and the drive will trip on OHt Inverter.100.
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 on OHt Inverter.100. If Minimum Switching Frequency (05.038) is changed the new value will only become active when Switching Frequency (05.037) is at or above the minimum value.
| Parameter | 05.036 Auto-switching Frequency Step Size | ||
|---|---|---|---|
| Short description | Auto-switching frequency reduction step size | ||
| Mode | Regeneration | ||
| 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 | Regeneration | ||
| 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 | Minimum Switching Frequency | ||
| Mode | Regeneration | ||
| Minimum | 0 | Maximum | VM_MIN_SWITCHING_FREQUENCY |
| Default | 1 | 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 | Regeneration | ||
| 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 which the drive uses to manage the inverter stage temperature. On reaching the maximum inverter temperature ripple the drive will reduce its switching frequency using Maximum Switching Frequency (05.018), Minimum Switching Frequency (05.038) and Auto-switching Frequency Step Size (05.036) where allowable. If the drive is unable to reduce its switching frequency and the temperature continues to exceed the maximum inverter temperature ripple a OHt Inverter.100 trip will be generated. See Auto-switching Frequency Change (05.035).