Schaffner (Edison, NJ) introduces the FN510 dv/dt filter
which eliminates premature motor damage caused by high
dv/dt, over-voltages on motor cables, motor overheating
and more, to prolong service life motors in high precision
environments. Suitable for motors from 1.5 to 30 Kw with
frequencies up to 400Hz ( 4 to 24A) or to 200Hz (33 to 66A),
this proven technology reduces high output voltage dv/dt from
IGBT motor drives and restricts over-voltages caused by line
reflections on motor cables. In addition to providing efficient
motor and insulation protection, the FN510 includes an IP20
housing and touch-safe terminal blocks which contribute to
overall equipment safety. Typical applications include servo
drives, closed loop vector drives, machinery with servo or
torque motors, robotics, pick-and-place machinery, motors with
short to medium cables, and applications where sine wave
filters are not applicable.
Temperature monitoring and an internal cooling fan protect
the filter from thermal overload. The FN510 eliminates the
interference propagation towards components or conductors
in the vicinity. They are easily installed and provide immediate
results. Models are available to accommodate switching
frequencies of 2 to 16 kHZ. Meets UL 1283, CSA 22. 2 No. 8
1986, IEC/EN 60939.
Schaffner FN510 filters are part of an extensive
family of dv/dt filters and sine wave
filters which improve motor-drive
performance for applications
where long cable lengths are a
concern, even up to 690vac.
Schaffner EMC, with US
in Edison, NJ, is part of The
Schaffner Group – a worldwide
leader in the fields of electromagnetic compatibility (EMC),
power quality (PQ) and
engineered transformers. From
a global innovation and development
center in Luterbach, Switzerland, the
company develops leading edge products which are
manufactured in facilities worldwide. Their PQ product line
includes active and passive harmonic filters, along with sine
wave filters, which allow the efficient and reliable operation of
electrical and electronic equipment and systems. For additional
information write to them at Schaffner EMC Inc., 52 Mayfield
Avenue, Edison, NJ, 08837, or call (800) 367-5566 ext 276.
Schaffner Introduces FN510 Output Filter for Motor Drives – Ideal for Robotic Applications
start with a concrete limit and measured the average power
consumption of the rest of the circuit. Unfortunately, the rest
of the circuit was spread out among many different evaluation
boards, each with numerous extraneous components like
diagnostic LEDs and their own onboard power regulators. This
made gauging accurate and real-world power consumption
impossible. I also wanted a modern, efficient solar charging
solution. I didn’t want to settle for just hooking up a big enough
panel to a battery-charging integrated circuit and call it a day.
I was reading about a category of devices called “energy
harvesters,” which are just ICs that contain highly specialized
circuitry designed to eke every last drop of usable power from any
attached electrical source and store it in a battery as efficiently
as possible. The BQ25504 stood out because some people who
had worked with the chip published their open-source designs.
However, there were no breakout boards available on the market.
If I wanted to accurately gauge the power consumption of the
total circuit, it was time to roll my own board.
There’s a certain amount of hubris that goes into a design’s
first circuit board topology. Depending on their experience and
threshold for adventure, designers start somewhere between
basically making breakout boards for every single component
and wiring them up together, to a fully-integrated PCB that’s
a few flying wires shy of a gold master. For this project, I felt
I knew enough about the display and WiFi system portions to
jump straight into baking my solar charging prototype right onto
a compact board next to my WiFi and display sections. I was
wrong. The gamble of skipping a prototyping step ended up
costing me quite a bit of time when troubleshooting a board
that had no business being addressed at the level I needed.
Swapping out resistors and rewiring pins is much easier when
you’re not avoiding other components. I ended up redoing it
all anyway and making a breakout board for the solar charging
IC by itself. While I still didn’t have the exact average current
consumption I needed to size some of the final components, I
now had a ballpark of what type of solar cell and battery to pair
with this charger.
Now that I have all three subsystems wired together and
working on the bench, it was time to take all the lessons
learned from the three avenues and combine them into
one manufacturable design. The design is currently being
manufactured at MacroFab, an end-to-end electronics
manufacturer. This gives me the opportunity to test whether
the design is ready for manufacture by actually manufacturing
one and working with them to iron out snags on the way. Once
the design comes back, I’ll write a follow up with more of my
adventures in wireless consumer designs!
I am leaving the programming header and extra component
pads available, and I invite enterprising hackers and curious
people to try their hand at modifying my source code to suit
their needs, or to use this as a platform for exploring their own
wireless solar e-paper designs.