GSCB6

Green Power Solutions srl Via Greto di Cornigliano 6R - 16152 Genova , Italy Phone: +39-010-659 1869 Fax: +39-010-659 1870 Web: www.gpsemi.it E-mail: info@gpsemi.it GSCB6 SCR CONTROL BOARD Full insulation from the power circuit Insensitive to the input phase sequence Phase loss inhibit Soft-start and soft-stop functions Linear firing delay angle generation Voltage and current control loops Optional Aux. boards for communication and firing External pulse transformers LINE VOLTAGE UP TO 690V The board employs an industry-standard fixed-point 16bit DSP controller design and operates either as digital firing gate board or as stand-alone digital controller board. An auxiliary firing board is available to extend the drive capability up to 12 SCRs.The gate angle delay generation is fully digital and accepts analog control inputs. The board implements load current control loop and/or load voltage control loop. It accepts current feedback either from Current Transformer or insulated DC current feedback (0-5V or 0-10 V). Isolated RS485 and CAN interfaces are also available as optional using an auxiliary communication board. MAXIMUM RATINGS Parameter VAC (RMS) VINS (RMS) VCOM PSUP TA TS Maximum RMS mains voltage Description Conditions Sine waveform T = 1min Value 690 V 2500 V Insulation voltage between mains and control sections Analog reference command Power consumption Operating temperature Storage temperature 0 to +12 V At full load 25 W -10 to 55 °C -65 to 65 °C ELECTRICAL CHARACTERISTICS Parameter Description PS VCOM αD fα TSTART TSTOP IGM dIG/dt VGM0 IG VG0 Power supply Analog voltage type reference command Gate delay angle Gate delay angle command response frequency Soft start range Soft stop range Initial hard trigger gate current peak First pulse gate current derivative First pulse open circuit gate voltage Sustaining short circuit gate current Open circuit gate voltage Conditions Value 2x12VAC 0.6A + 220 VAC 0 to 5 V 0.5 to 179.5 deg 300 Hz 0.05 to 30 s 0.05 to 30 s With 1 ohm load resistance and 3:1 pulse transformers 2A >0.8 A/us 15 V With 1 ohm load resistance and 3:1 pulse transformers 0.5 A 7V SCR CONTROL BOARD GSCB6 Block diagram 2 x 12 VAC Voltage Supervisor Phase Loss RESET 220 VAC Phase Loss Logic Local Supply Synchro Unit Main Supply 7 To auxiliary firing board Sync VRS, VST, VTR 3 3 DSP 12 Output Logic 6 6 6 Digital Input Unit Inhibit 1 Inhibit 2 V/I Control Encoder 4 Input Logic Encoder Interface 6 Output Buffer Pulse Transformer To SCRs 2 5 MAX MIN RS232 Serial Interface RS485 T START T STOP CAN 3 2 VCOM, IREF, VREF IDC, VDC 5 Amplifier Lowpass filter Analog Input Unit To Communication Board 5 IDC From mains current transformers 3 Amplifier Lowpass filter + Protection Unit I MAX / V MAX Adjust Unit SCR FIRING BOARD Blocks description Unit Synchro Digital Input Analog Input Protection Description Provides opto insulated signal for mains synchronisation Defines control variable (V or I), acquires inhibit signals, provides encoder input Provides fitered input for reference and feedback signals Generates overcurrent fault signal. Current trip adjustable by means of a trimmer. Configuration of maximum and minimum delay angle, start and stop time, manual adjusting of output voltage (current) Gate pulses generation and shaping Adjust Output buffer Document GSCB6T002 SCR CONTROL BOARD GSCB6 Document GSCB6T002