Parameter Settings for PowerFlex Drives Using Sine Wave ...

1 Application Technique Parameter Settings for PowerFlex Drives Using Sine Wave Filters, dv/dt Filters, and Adjustable Voltage PowerFlex 700, 700VC, and 750-Series AC Drives Topic Page About This Document 1. PowerFlex 700 Parameter Settings for Use With Sine Wave Filters 2. PowerFlex 700 Parameter Settings for Use With dv/dt Filters 3. PowerFlex 700VC Parameter Settings for Use With Adjustable Voltage 4. Application With a Sine Wave Filter PowerFlex 753/755 Parameter Settings for Use With Sine Wave Filters 8. PowerFlex 753/755 Parameter Settings for Use With dv/dt Filters 9. PowerFlex 753/755 Parameter Settings for Use With Adjustable Voltage 10. Application About This Document This information applies to PowerFlex 700, PowerFlex 700VC, and PowerFlex 750-Series AC Drives .

2 This document provides information for key parameters that can be adjusted when applying the Adjustable Voltage or V/Hz control methods through a Sine wave filter at the output of a Variable Frequency drive (VFD). Setting up the drive parameters described in this document modifies the Stability gains, modulation mode, and prevents over reaction to the charging current into the capacitor branch of a Sine wave filter. PFLEX-AT002A-EN-P. PowerFlex 700 Parameter Parameter Name Default Setting Set To Settings for Use With Sine P053 Motor Cntl Set 0 (Sensrls Vect) 2 (Custom V/Hz). P056 Compensation Wave Filters Bit 0 - Reflect Wave 1 (enabled) 0 (disabled). Bit 3 - Xsistor Diag 1 (enabled) 0 (disabled). Bit 7 - PWM Freq Lock 0 (disabled) 1 (enabled).

3 P057 Flux Up Mode 0 (manual) 0 (manual). P058 Flux Up Time sec sec P150 drive OL Mode 3 (both-PWM 1st) 1 (reduce CLim). P151 PWM Frequency 2 or 4 kHz see filter instructions P506 Angl Stability Gain 51 0. P507 Volt Stability Gain 93 10. P524 Modulation Mode 0 (2-phase + SpV) 1 (Space Vector only). P069 Start/Acc Boost xx not too high P070 Run Boost xx per motor P071 Break Voltage xx per need P072 Break Frequency xx per need IMPORTANT Do not autotune. Below is list of operational theory that describes why the Parameter Settings are used. Motor control setting (P053) needs to be V/Hz because, with the filter between the drive and motor, the load no longer looks like a motor to the drive . Therefore, the drive needs to operate in a simple V/Hz mode.

4 Reflected wave (P056, Bit 0) is turned off so that there will be no missing pulses in the output voltage waveform, and to minimize any offsets that could appear. Transistor diagnostics (P056, Bit 3) is turned off because the sequence of turning transistors on and off charges the capacitors in the filter and can cause an instantaneous over-current (IOC) trip. Pulse width modulation (PWM) frequency lock (P056, Bit 7) is on because the filter is tuned to the carrier frequency, and if the carrier frequency were to change, the filter would not work, so the carrier must be fixed. Also, the PWM frequency needs to be set for whatever the filter is tuned to: either 2 or 4 kHz. drive OL mode (P150) is set for reduce current limit, and not the PWM.

5 Frequency, for the same reason as pulse width modulation frequency lock. Angle stability gain (P506) is set for 0 so it does not try to compensate for the currents it sees going into the filter's capacitors. Voltage stability gain (P507) is set for 10 for the same reason as angle stability gain. Modulation mode (P524) is set for space vector only since 2-phase modulation would degrade the filter's performance. 2 Rockwell Automation Publication PFLEX-AT002A-EN-P - May 2011. PowerFlex 700 Parameter Parameter Name Default Setting Set To Settings for Use With dv/dt P053 Motor Cntl Set 0 (Sensrls Vect) V/hz, SVC, or FVC. P056 Compensation Filters Bit 0 - Reflect Wave 1 (enabled) 0 (disabled). Bit 3 - Xsistor Diag 1 (enabled) 0 (disabled).

6 Bit 7 - PWM Freq Lock 0 (disabled) 1 (enabled). P057 Flux Up Mode 0 (manual) 0 (manual). P058 Flux Up Time sec sec P150 drive OL Mode 3 (both-PWM 1st) 1 (reduce CLim). P151 PWM Frequency 2 or 4 kHz see filter instructions P506 Angl Stability Gain 51 0. P507 Volt Stability Gain 93 10. P524 Modulation Mode 0 (2-phase + SpV) 0 or 1. P069 Start/Acc Boost xx not too high P070 Run Boost xx per motor P071 Break Voltage xx per need P072 Break Frequency xx per need IMPORTANT Do not autotune. Below is list of operational theory that describes why the Parameter Settings are used. Motor control setting (P053) can be V/Hz, Sensorless Vector Control (SVC), or Flux Vector Control (FVC). Reflected wave (P056, Bit 0) is turned off so that there will be no missing pulses in the output voltage waveform, and to minimize any offsets that could appear.

7 Transistor diagnostics (P056, Bit 3) is turned off because the sequence of turning transistors on and off charges the capacitors in the filter and can cause an instantaneous over-current (IOC) trip. Pulse width modulation (PWM) frequency lock (P056, Bit 7) is on because the filter is tuned to the carrier frequency, and if the carrier frequency were to change, the filter would not work, so the carrier must be fixed. Also, the PWM frequency needs to be set for whatever the filter is tuned to: either 2 or 4 kHz. drive OL mode (P150) is set for reduce current limit, and not the PWM. frequency, for the same reason as pulse width modulation frequency lock. Angle stability gain (P506) is set for 0 so it does not try to compensate for the currents it sees going into the filter's capacitors.

8 Voltage stability gain (P507) is set for 10 for the same reason as angle stability gain. Modulation mode (P524) is set for space vector only since 2-phase modulation would degrade the filter's performance. Rockwell Automation Publication PFLEX-AT002A-EN-P - May 2011 3. PowerFlex 700VC Parameter Name Default Setting Set To Parameter Settings for Use P196 [Param Access Lvl] 0 (Basic) 2 (Reserved). P053 (1) Motor Cntl Sel 0 (Sensorless Vector) 5 (Adj Voltage). With Adjustable Voltage P056 Compensation xx011011 xx010010. Application With a Sine Bit 0 - Reflect Wave 1 (enabled) 0 (disabled). Wave Filter Bit 3 - Xsistor Diag 1 (enabled) 0 (disabled). Bit 7 - PWM Freq Lock (2) 0 (disabled) 1 (enabled). P057 Flux Up Mode 0 (manual) 0 (manual).

9 P058 Flux Up Time sec sec P069 (1) Start/Acc Boost Based on drive rating 0. P070 (1) Run Boost Based on drive rating 0. P071 (1) Break Voltage Motor NP Volts x 0. P072 (1) Break Frequency Motor NP Hertz x 0. P150 drive OL Mode 3 (both-PWM 1st) 1 (Reduce Climit). P151 PWM Frequency 2 or 4 kHz see filter instructions (typically 2 or 4 KHz). Hidden Parameters P506 Angle Stability Gain 51 0. P507 Volt Stability Gain 93 10. P524 Modulation Mode 0 (2-phase + SUV) 1 (Space Vector). P552 Dead Time Comp (3) 75% 0%. (1) Set these parameters (69, 70, 71, and 72) when Using mode 5 (Adj Voltage) for P053. (2) In Drives with firmware and newer. (3) May be required to adjust setting if there are DC offset voltages at LOAD transformer input windings.

10 IMPORTANT Do not autotune. Note: Many, but not all, adjustable voltage applications require a Sine wave filter. Below is list of operational theory that describes why the Parameter Settings are used. Motor control setting (P053) needs to be set in a form of V/Hz because, with the Sine wave filter between the drive and motor, the load no longer looks like a motor to the drive . The Adjustable Voltage feature set is used in nontraditional/non-motor applications that require independent voltage regulator and frequency regulator power control to the load. The drive output is still a form of V/Hz. Reflected wave (P056, Bit 0) is turned off so that there will be no missing pulses in the output voltage waveform, and to minimize any offsets that could appear.