Fuji Electric FRENIC MEGA G2 Series - Page 13

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[ 6 ] PMSM drive ............................................................................................................................ 8-17
8.8 FM Output Section ........................................................................................................................... 8-19
Chapter 9 COMMUNICATION FUNCTIONS
9.1 Overview of RS-485 Communication ................................................................................................. 9-1
9.1.1 RS-485 common specifications ..................................................................................................... 9-2
9.1.2 RS-485 communication terminal specifications ............................................................................. 9-3
[ 1 ] RS-485 COM port 1 (RJ-45 connector for keypad connection) specification ............................ 9-3
[ 2 ] RS-485 COM port 2 (terminal block) specifications .................................................................. 9-3
9.1.3 Connection method ....................................................................................................................... 9-4
9.1.4 RS-485 connection devices........................................................................................................... 9-6
[ 1 ] Converter .................................................................................................................................. 9-6
[ 2 ] Requirements for the cable (COM port 1: for RJ-45 connector) ............................................... 9-6
[ 3 ] Requirements for the cable (COM port 2: for RS-485 terminal block connection) .................... 9-6
[ 4 ] Branch adapter for multi-drop ................................................................................................... 9-6
9.1.5 RS-485 noise suppression ............................................................................................................ 9-7
9.2 FRENIC Loader Overview ................................................................................................................. 9-8
9.2.1 Specifications ................................................................................................................................ 9-8
Chapter 10 SELECTING OPTIMAL MOTOR AND INVERTER CAPACITIES
10.1 Motor Output Torque Characteristics ............................................................................................... 10-1
10.2 Selection Procedure ........................................................................................................................ 10-3
10.3 Equations for Selections .................................................................................................................. 10-6
10.3.1 Load torque during constant speed running ............................................................................... 10-6
[ 1 ] General equation .................................................................................................................... 10-6
[ 2 ] Obtaining the required force F ................................................................................................ 10-6
10.3.2 Acceleration and deceleration time calculation .......................................................................... 10-8
[ 1 ] Calculation of moment of inertia ............................................................................................. 10-8
[ 2 ] Calculation of the acceleration time ...................................................................................... 10-10
[ 3 ] Calculation of the deceleration time ....................................................................................... 10-11
[ 4 ] Calculating non-linear acceleration/deceleration time............................................................ 10-11
[ 5 ] Calculating non-linear deceleration time ............................................................................... 10-12
10.3.3 Heat energy calculation of braking resistor .............................................................................. 10-13
[ 1 ] Calculation of regenerative energy ....................................................................................... 10-13
10.3.4 Calculating the RMS rating of the motor .................................................................................. 10-14
10.4 Selecting the Inverter Rating Specification (HHD/HND) ................................................................ 10-15
10.4.1 Precautions in making the selection ......................................................................................... 10-15
10.4.2 Guideline for selecting inverter specification and capacity ....................................................... 10-16
Chapter 11 SELECTING PERIPHERAL EQUIPMENT
11.1 Configuring the FRENIC-MEGA .......................................................................................................11-1
11.2 Size of Current for Each Part of the Inverter .....................................................................................11-2
11.3 Molded Case Circuit Breakers (MCCB), Earth Leakage Circuit Breakers (ELCB) and Magnetic
Contactors (MC) ...............................................................................................................................11-5
11.3.1 Function Overview ......................................................................................................................11-5
11.3.2 Connection Example and Criteria for Selection of Circuit Breakers ............................................11-6
11.4 Surge Killers ................................................................................................................................... 11-12
11.5 Lightning Surge Protection Device SPD ......................................................................................... 11-13
11.6 Surge Absorbers ............................................................................................................................. 11-14
11.7 Filter Capacitors for Suppressing AM Radio Band Noise................................................................ 11-15
11.8 Braking Resistors (DB) and Braking Units ...................................................................................... 11-16
11.8.1 Selecting a Braking Resistor ..................................................................................................... 11-16
[ 1 ] Selection procedure ............................................................................................................... 11-16
[ 2 ] Notes on selection ................................................................................................................. 11-16