POWER FEATURE EVENTS WITH THE HELP
the support of application specialists from PULS, the customer evaluated the initial data after putting the power supply into operation. The aim was to investigate three different
processes: • 1. The parallel operation of the running motors without braking. • 2. The parallel operation of running and braking motors • 3. The serious case of all the motors stopping abruptly at the same time, for example in the event of an emergency stop. In all three situations, the output voltage and the current were measured and analysed over a specific period. As expected, in situation 1, where the motors
were running, there were no noticeable problems (see Figure 1). However, the first load profile for the plant in normal operation was determined, which can help with identifying the correct size of the power supply. In situation 2, the parallel operation of running
and braking motors was analysed. In almost all cases, the energy from the braking motors resulting from backfeeding was directly absorbed by the running motors. Only one brief occurrence of a slightly increased output voltage and a negative current spike was observed, which did not present a problem for the power supplies (see Figure 2, marked in red). Situation 3 was more critical. All the drum
motors stopped simultaneously and caused a rapid drop in current and an increase in voltage to 31 V (see Figure 3). The data analysis showed that this situation
led to the system shutdowns that were mentioned initially. The capacity of the output capacitors in the previous power supplies was not sufficient in this case. As a result, the power supplies shut down. The FIEPOS power supplies are very
electrically robust. The highest permitted output voltage during a backfeeding event is 35 V/4.3 J for the FPT300. The output capacity is 18,000 µF. As a result, the worst figure of 31 V in this
example presented no problem for the power supply. As soon as the voltage fell again, the FIEPOS power supply automatically continued working in normal mode. However, it is worth mentioning here that the motor control centres from different manufacturers shut down for self-protection at a voltage of around 32 V. The detailed inspection by the technical specialists at PULS before the customer made their purchase decision gave the customer the confidence that they were opting for a reliable, future-proof solution.
DECENTRALISED SOLUTIONS FOR INTRALOGISTICS Alongside its extensive IP20 portfolio, PULS is expanding its range of power supplies in protection classes IP54, IP65 and IP67 for decentralised use outside the cabinet. For system developers that means greater flexibility when planning a plant and more space in the system, together with time and cost savings.
PULS FIEPOS decentralised power supply
The FIEPOS product family is based on
single-phase and three-phase 360 W or 600 W field power supplies. The majority of the systems also function at 200% for five seconds. This makes them ideal for starting
“PULS has developed the FIEPOS family of power supplies for decentralised use and has integrated the option of
application analysis”
high-current loads and prevents the need for expensive, oversized, power supplies. Over the next few months, additional performance classes will be added to the FIEPOS portfolio. The power supplies are available with a variety of connector configurations, including
M12-L/-T/-A, 7/8” and Han Q series. The power supplies from the FIEPOS eFused range have up to four current-limited outputs. These systems allow for selective current distribution, protection and monitoring in the field.
POWER SUPPLIES: AN ESSENTIAL FEATURE A reliable and versatile power supply is an essential feature of end-to-end decentralisation in intralogistics systems. However, for this goal to become reality, power supply manufacturers must collect as much practical data as possible from the field of intralogistics to be able to offer appropriate solutions. The key is to gather and evaluate real application data. PULS plays a leading role as an innovator in
application analysis on the basis of power supply data. A global team of application engineers advises customers and users on overcoming their technical challenges. The team members can answer questions about complex application situations and identify the best solutions. The findings from this data is also essential for
the development of the decentralised power supply solutions of the future.
PULS
www.pulspower.com
APRIL 2025 DESIGN SOLUTIONS 39
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