Power Electronics SD700SP Series, Hardware And Installation Manual

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POWER ELECTRONICS SD700SP
POWER CONNECTION
27
EN
General Block Scheme
SD700SP integrate as standard input chokes filters. These filters significantly reduce the THDi values,
and increase the impedance line protecting the drive against electrical distortions. Depending on the
frame, the input choke filter is installed in the input side or in the DC bus. For frames 3 to 8 filter is
installed in the input side. For frames 1 and 2 filter is installed in the DC bus.
SD700SP frames 5 to 8 integrate as standard ultra fast AC fuses that protect the drive against
downstream overcurrents. Additionally, the drive integrates multiple electrical protections that protect the
drive and the motor as a motor relay does.
The SD700SP
includes a power and a control board to control the rectifier thyristor diode’s bridge
shooting, the inverter IGBT’s bridge shooting, the soft charge, the DC bus voltage and the motor
performance. In addition, control board integrates the interface terminals such as communication ports,
the digital and analogue inputs and outputs, colour touch-screen display and alphanumeric display, etc.
The inverter bridge generates the PWM wave that controls the motor performance (voltage, current,
torque, etc...). SD700SP Series by Power Electronics, integrate as standard output dV/dt filters and a
CLAMP system that reduces significantly the dV/dt rise time below
500V/μs - 800V/μs, therefore, it
reduces the voltages peaks at the motor windings, the common mode currents and the EMC emissions.
The following schemes illustrate the SD700SP internal power structure: