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Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C-Frame) - ForGe Control User Manual

Page 24

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24

Rockwell Automation Publication 7000L-UM301D-EN-P - June 2014

Chapter 1

Overview of Drive

Rectifier Switch Cooling

Double Sided, Low Thermal Stress

Number of Rectifier Devices per phase Voltage

AFE

18 Pulse

2400V
3300V
4160V
6600V

2
4
4
6

6
6
6
6

Output Current THD (1

st

…49

th

)

< 5%

Output Waveform to Motor

Sinusoidal Current / Voltage

Medium Voltage Isolation

Fiber Optic

Modulation techniques

Selective Harmonic Elimination (SHE)
Synchronous Trapezoidal PWM
Asynchronous or Synchronous SVM (Space Vector Modulation)

Control Method

Digital Sensorless Direct Vector
Full Vector Control with Encoder Feedback (Optional)

Tuning Method

Auto Tuning via Setup Wizard

Speed Regulator Bandwidth

1...10 rad/s with standard control
1...20 rad/s with HPTC (optional)

Torque Regulator Bandwidth

15...50 rad/s with standard control
80...100 rad/s with HPTC (optional)

Torque Accuracy with HPTC (optional)

+/- 5%

Speed Regulation

0.1% without Encoder Feedback
0.01...0.02% with Encoder Feedback

Acceleration/Deceleration Range

Independent Accel/Decel – 4 x 30 s

Acceleration/Deceleration Ramp

Rates

4 x Independent Accel/Decel

S Ramp Rate

Independent Accel/Decel – 2 x 999 s

Critical Speed Avoidance

3 x Independent with Adjustable bandwidth

Stall Protection

Adjustable time delay

Load Loss Detection

Adjustable level, delay, speed set points

Control Mode

Speed or Torque

Current Limit

Adjustable in Motoring and Regenerative

Output Frequency Range

0.2...75 Hz (Standard)

75 Hz...85Hz (Optional - need specific Motor Filter Capacitor [MFC])

Service Duty Rating

Normal Duty

Heavy Duty

110% Overload for 1 min. every 10
min.
(Variable Torque Load)

150% Overload for 1 min. every 10
min.
(Constant Torque Load)

Typical VFD Efficiency

> 97.5% (AFE)

> 98% (18 Pulse)

Contact Factory for Guaranteed Efficiency
of Specific Drive Rating

Input Power Factor

AFE Rectifier

0.95 minimum, 10...100% Load

Table 1 - General Design Specifications (Continued)

Description