Goodrive3000 Rectifier; Overview; Function Description; P00 Group--Basic Functions - INVT Goodrive3000 Series Operation Manual

Goodrive3000 series medium voltage VFD
Note: Chapter 5 is applicable only for four-quadrant VFD rectifier.

5.1 Overview

The main circuit of PWM rectifier unit includes the LCL filter circuit, main contactor, buffer contactor, buffer resistor, IGBT
power modules and bus capacitors. It uses the dual closed loop control structure, in which the outer loop is the bus
voltage loop and the inner is the current loop. The active and reactive components of the grid input current are separately
controlled by means of phase detection on power voltage, coordinate change, and PI regulator. When the controlled
reactive current component is 0, the rectifier power factor can be close to 1 and the energy can flow in both directions.
3PH 1140VAC
Note: Q1 is the isolating changeover switch; the LCL filter consists of L1, C and L2; R0 is the power buffer resistor; KM1 is
the main contactor; KM2 is the buffer contactor and L3 is the output reactor.
PWM rectifier and inverter can be combined into the four-quadrant VFD. The PWM rectifier can be used for potential loads,
such as hoists, locomotive traction, oil pumping units and centrifugal machines. In some large-power application
scenarios, four-quadrant variable-frequency is needed to reduce the harmonic interference on the grid. The VFD with
PWM rectifier has the functions of four-quadrant operation, meeting the requirements of speed regulation of various
potential loads. It can transform the regenerative energy of the motor into electric energy back to the grid and achieve
high-efficiency energy saving in energy feedback braking.
After the conversion of PWM rectifier, 3-phase AC current can be provided as DC current into the DC bus and the DC
circuit provides power to the motor.
The PWM rectifier monitors the AC power supply for overvoltage and phase loss, the IGBT module for overtemperature,
overcurrent, and overload, and the rectifier control power supply before pre-charge. It locks driving pulse and sends a fault
signal when detecting a fault. The fault can be reset after the re-switch on of the AC or control power supply.

5.2 Function description

P00 group––Basic functions
Function
code
P00.00
Channel of running
P00.01
The function code is used to select the channel of PWM rectifier control commands, including the start, stop, and fault
reset commands.
0: Keypad ("LOCAL/REMOT" indicator off)

5 Goodrive3000 rectifier

Q1 L1
C
Figure 5-1 PWM rectifier working principle
Name
0: PWM rectifier
Working mode
1: Six-pulse rectifier
0: Keypad (the indicator is off)
1: Terminal (the indicator blinks)
commands 2: Communication (the indicator is
on)
Rectifier
L2 KM1
KM2
R0
Current
IGBT drive
sampling
Control part
Phase
detection
Description
-21-
Goodrive3000 rectifier
Converter
L3
Bus voltage
sampling
Setting range
0–1
0–2
M
Default
1
0