Thyristors DC drive max. 690 VAC | PLXD

motor

The PLXD is used for controlling external 3 phase thyristor stacks for DC motors, and possesses all the functionality of the PL/X range. It is in the same package as the PL/X 5 - 50 models. The PLXD provides gate drive pulses for driving user supplied pulse transformers with primary pulse current up to 1.5 Amp. There are terminals to accept an externally generated isolated armature current signal, field signal, thermal heatsink sensor switch, and high voltage armature voltage feedback. The unit also provides a +24v supply for the gate drive pulse transformers that is short circuit protected. The following stack configurations can be driven by the PLXD: 1) 6 pulse 2 Quadrant bridge (6 thyristors), or 2 bridges in parallel (12 thyristors). 2) 6 pulse 4 Quadrant regen anti-parallel bridge (12 thyristors). Extra stacks can be used in parallel within the gate drive capability. All customer control terminals are the plug-in screw terminal variety. The PLXD can be used with up to 690v AC on its 3 phase auxiliary supply inputs (EL1/2/3). The external stacks can be of higher voltages if required. The armature voltage inputs can monitor up to +/-1000 Volts DC. There is an integral motor field bridge with independent single phase AC supply inputs (EF2/3) for controlling fields up to 32 Amps. The internal field bridge supply input voltage rating is 480v AC. Provision is made for providing an external field feedback signal and controlling