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1、Direct current main drive Control overview Processor board REK1 Processor board REK2 REK386 Memory analog board SAK SAK2 Input output control board ESK Central control cabinet input output board EAK2 15 Control of the d c main motor Converter power part SLT Brake Armature winding field winding Main
2、motor Brake control module BAM IDS Power converter board SRK The d c main motor is controlled by the power converter board SRK via the converter power part SLT The power converter board SRK regulates the armature and field circuits as specified by the processor board REK1 setpoint values Controlled
3、by the power converter board SRK the converter power part SLT generates the control signals for the field and armature windings of the d c main motor In addition the SLT records the armature and field currents as well as the mains armature and field voltages These current and voltage values are then
4、 used for drive control On the basis of the setpoint values from the control electronics REK1 REK2 REK386 ESK SAK SAK2 the brake control module BAM is controlled via the EAK2 The BAM then switches the motor brake in accordance with the setpoint values from the control electronics Via the encoder IDS
5、 the control electronics REK1 REK2 REK386 ESK SAK SAK2 receives information on the current press speed and direction of rotation Code resistors are assigned to the converter power part SLT and the main motor The power converter board SRK monitors these code resistors and thus whether the correct dri
6、ve components are connected Direct current main driveControl overview 91 Cross section of direct current main motor Layout Coil former for field winding north Coil former for field winding south Armature Armature windings with the different conduc tion directions Motor shaft Motor casing Converter p
7、ower part SLT The converter power part SLT supplies the main motor with current The SLT consists of the two power bridge modules SBM1 and SBM2 The field supply is effected by the SVT SBM1 and SBM2 are responsible for the power supply of the armature circuit Schematic representation of power converte
8、r power electronics S N S N M SBM1 SBM2 Field supply Armature supply L1 L2 L3 Direct current main driveControl overview 92 Block diagram of components Block diagram of components of direct current main drive Power choke 15L1 Fuses 15F1 Armature fuses 15F2 Interference suppressor module ESM Opto coup
9、ler module 15U5 Control electronics K48A GRM24 IDS Converter power part SLT M Armature winding Field windingBrake Brush monitoring Code Brake con trol module BAM Main motor GRM48 GRM120 Control transformer 15T1 Direct current main driveControl overview 93 Power choke 15L1 The power choke is in serie
10、s with the converter power part SLT in order to prevent system perturbations which can be caused by switching the thyristors of the converter power part Fuses 15F1 These fuses are the main fuses of the main drive They are connected in series with the converter power part Converter power part SLT On
11、the basis of the instructions received from the control electronics the converter power part controls the main motor via thyristors For the generation of the voltages for the internal electronics and the field voltage the SLT receives DC 120V from the rectifier module GRM120 Fuses 15F2 These fuses p
12、rotect the armature circuit of the main motor Direct current main motor M1 The main motor M1 is a d c shunt motor The armature and field windings are supplied with current by the converter power part SLT The field winding is supplied with a clocked direct voltage The armature winding receives a regu
13、lated positive or negative direct voltage from the SLT The main motor also contains the brake and the brush control monitoring carbon brush wear Code resistances allocated to the motor are read by the control electronics via the interference suppressor module ESM Control transformer 15T1 From the ma
14、ins voltage the control transformer generates the individual voltages for the printing press For the main drive control the control transformer supplies the rectifier modules GRM24 with 3xAC26V GRM48 with 3x AC37V GRM120 with 3x AC90V Rectifier module GRM24 From the 3x AC26V it receives the rectifie
15、r module GRM24 generates a direct voltage of DC 24V for the control electronics Rectifier module GRM48 From the 3x AC37V it receives the rectifier module GRM48 generates a direct voltage of DC 48V for the brake control module BAM Rectifier module GRM120 From the 3x AC90V it receives the rectifier mo
16、dule GRM120 generates a direct voltage of DC 120V This output voltage is supplied to the converter power part voltages for the electronics field voltage Contactor K48A When the press is ready to run the contactor K48A is controlled and passes the supply voltage from the GRM120 on to the converter power part SLT In the case of a malfunction the contactor which is controlled by the control electronics cuts off the power supply to the SLT and thus shuts down the main drive Brake control module BAM
