Siemens A1 List of Figures

International English Contents

List of Figures
Figure 1-1	Induction Motor. Simplified Cross Section .............................................	1
Figure 1-2	Torque Speed Characteristics of an Induction
	Motor ......................................................................................................	2
Figure 1-3	Torque Reduction above Base Speed....................................................	3
Figure 1-4	Inverter Block Diagram ...........................................................................	3
Figure 1-5	Pulse Width Modulation..........................................................................	4
Figure 3-1	Sources of Supply Disturbance ..............................................................	10
Figure 3-2	Rectifier Input Voltages and Currents.....................................................	11
Figure 3-3	Typical Harmonic currents in 230 V single and
	three-phase supplies, (750 W Inverter)...................................................	12
Figure 3-4	Operating Capabilities of Motor/Inverter
	Combinations..........................................................................................	13
Figure 3-5	Torque/Speed Characteristics ................................................................	14
Figure 3-6	Variable Torque/Load Characteristics ....................................................	14
Figure 3-7	Matching the load to the Motor/Inverter
	Capabilities.............................................................................................	15
Figure 4-1	Input Wiring. Single-Phase Supplies .....................................................	18
Figure 4-2	Input Wiring. Three-Phase Supplies ......................................................	18
Figure 4-3	1AC or 3AC, 230 V Input. (Motor usually Delta
	Connected).............................................................................................	18
Figure 4-4	3AC, 400 – 575 V Input. (Motor usually Star
	Connected).............................................................................................	18
Figure 4-5	Typical Installation ..................................................................................	19
Figure 5-1	Using a Potentiometer with the Analog Input..........................................	21
Figure 5-2	Using all the Digital Inputs ......................................................................	22
Figure 5-3	Composite Control Cycle........................................................................	23
Figure 5-4	Smoothing applied to UP and DOWN ramps..........................................	25
Figure 5-5	Possible control cycle using brake control relay
	and times................................................................................................	26
Figure 5-6	Slip Compensation .................................................................................	27
Figure 5-7	Voltage Boost .........................................................................................	28
Figure 6-1	EMC. Emissions and Immunity..............................................................	29
Figure 6-2	Star Point Grounding ..............................................................................	31
Figure 6-3	Screening of Control Cables...................................................................	31
Figure 6-4	Separation of Control and Power Connections.......................................	31
Figure 6-5	Suppression of Contactor Coils ..............................................................	32
Figure 6-6	Use of Screened or Armoured Cables....................................................	32

MICROMASTER Applications Handbook vii