Nidec Answer Drives 1000 Series - Principle of Operation

Summary
Preface P. 6
Chapter 2 P. 17
Technical data
Chapter 5 P. 76
Reception, storage
and installation
Chapter 4 P. 54
General information
Chapter 3 P. 47
Application notes
Chapter 6 P. 115
Options
Chapter 7 P. 129
Preventive maintenance
Chapter 1 P. 15
Overview
and installation diagram
Answer Drives 1000
47
3
3 APPLICATION NOTES
3.1 PRINCIPLE OF OPERATION
The main components of AD1000 are the following:
• Input power terminals
• Input rectifier circuit
• Pre-charge
• DC bus capacitors
• Power terminals output
• Microprocessor board
• Keypad display module
• Power and drive board
• IGBT power modules
Figures 3.1.1 / 3.1.2 show a wiring diagram of the AD1000.
The drive consists of three main sections:
• Drive section: converts the input AC voltage at fixed frequency into
a DC voltage
• DC Bus: consists of a bank of capacitors used to filter the line ripple
and store energy.
• Drive section: provides the IGBT modules controlled to convert the DC
voltage into a three-phase AC output voltage, which varies in frequency
and amplitude, used to control the connected motor.
Figure 3.1.1 - Diagram of the AD1000 (0P3F – 036F) Figure 3.1.2 - Diagram of the AD1000 (045F – 520F)
NOTE
the pre-load contactor in some sizes is placed on the DC bus negative.
Refer to the power diagrams in Chapter 2.
3 APPLICATION NOTES - 3.1