Danfoss VLT 380-500 V, Design Manual

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13 Braking
123
13.1 Types of Braking
123
13.2 Brake Resistor
123
14 Controls
128
14.1 Overview of Speed and Torque Control 128
14.2 Control Principle 128
14.3 Control Structure in VVC
+
Advanced Vector Control
131
14.4 Control Structure in Flux Sensorless
132
14.5 Control Structure in Flux with Motor Feedback
132
14.6 Internal Current Control in VVC
+
133
14.7 Local and Remote Control 133
14.8 Smart Logic Controller 134
15 Handling of References
136
15.1 Reference Limits 137
15.2 Scaling of Preset References 138
15.3 Scaling of Analog and Pulse References, and Feedback 138
15.4 Dead Band Around Zero 139
16 PID Controls
143
16.1 Speed PID Controls 143
16.2 Process PID Controls 146
16.3 Optimization of PID Controls 150
17 Application Examples
152
17.1 Automatic Motor Adaptation (AMA) 152
17.2 Analog Speed Reference 152
17.3 Start/Stop 153
17.4 External Alarm Reset 154
17.5 Speed Reference with Manual Potentiometer 154
17.6 Speed Up/Down
155
17.7 RS485 Network Connection
155
17.8 Motor Thermistor
156
17.9 Relay Set-up with Smart Logic Control
156
17.10 Mechanical Brake Control
157
17.11 Encoder Connection
157
17.12 Encoder Direction
157
17.13 Closed-loop Drive System
158
17.14 Programming of Torque Limit and Stop
158
Contents Design Guide
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