Content 5 Page 3.3 Automatic Motor Adaption (AMA)......................................................................................86 3.4 Operation .....................................................................................................................................87 3.4.1 Motor Speed Control ....................................................................................................87 3.4.2 Reversing ..........................................................................................................................88 3.4.3 Acceleration and Deceleration Ramps (Ramp Up and Down) .......................89 3.4.4 Motor Torque Control ...................................................................................................91 3.4.5 Watchdog .........................................................................................................................92 3.5 Dynamic Brake Operation ......................................................................................................93 3.5.1 Extending Deceleration Ramp ..................................................................................94 3.5.2 Motor as a Breaking Resistor ......................................................................................94 3.5.3 Brake Chopper Circuit (Brake Module) and Resistor .........................................95 3.5.4 Use of a Regenerative Braking Unit .........................................................................95 3.6 Static Brake Operation ............................................................................................................96 3.6.1 Coasting to Stop .............................................................................................................97 3.6.2 DC Braking ........................................................................................................................97 3.6.3 DC Hold .............................................................................................................................97 3.6.4 Electromechanical Brake .............................................................................................97 3.7 Motor Heating and Thermal Monitoring ..........................................................................98 3.8 Functional Safety ...................................................................................................................
100 4 Saving Energy with Frequency Converters ...................................................................... 104 4.1 Potential .................................................................................................................................... 104 4.2 Motor + Frequency Converter Effi ciency ...................................................................... 105 4.3 Classifi cation of Energy Effi ciency ................................................................................... 106 4.4 Energy Effi cient Motor Start ...............................................................................................
109 4.5 Energy Effi cient Motor Control ......................................................................................... 111 4.6 Load over Time........................................................................................................................ 113 4.6.1 Applications with Variable Torque ........................................................................ 113 4.6.2 Applications with Constant Torque ...................................................................... 115 4.7 Life Cycle Costs .......................................................................................................................
116 4.8 System Savings ....................................................................................................................... 117 4.9 Using Renegerated Power .................................................................................................. 119 5 Electromagnetic Compatibility .............................................................................................. 122 5.1 EMI and EMC ............................................................................................................................ 122 5.2 EMC and Frequency Converters .......................................................................................
123 5.3 Grounding and Shielding ................................................................................................... 125 5.4 Installations with Frequency Converters ....................................................................... 130 5.5 Legislation and Standards .................................................................................................. 131