One of the best things about running 4QD is seeing all the projects that our customers are involved in. This picture is from the Warsash Superyacht Academy and shows their fleet of training vessels. Featuring our Pro-120s and DNO-10s
I had to share this picture of Michael F’s Bay Cruiser for no other reason than the simply outstanding colours!
It’s got a 2.5kW motor running at 36V and is controlled by a 4QD-300L with a closed loop fresh water cooling system.
The Guys at the Broads Authority sent us this picture of a Kapf Solar boat that they have re-powered using 2 of our 4QD-300X controllers.
Should make for some lovely days out on the water!
Is this a mini monster truck, or a monster mini truck?
Either way it’s a great piece of engineering and a totally new take on what to do when the kids say “Dad, can you build us a car please?”
A water cooled 4QD-300L is fitted to deal with the high currents that this beast needs.
Here’s a sneak preview of our soon to be launched Softstart. This is a small motor controller stripped down to the basics that gives a progressive start-up ramp to eliminate the large torque spikes that occur if a motor is switched on instantly via a relay or switch. We’ve designed this using a small microprocessor which means that the ramp time is configurable, and also given it a couple of other inputs so that it can be used for a variety of other simple switching tasks. We’ll be making the code available to allow [encourage?] experimentation.
Here’s a lovely rendition of an early Renault Voiturette that a customer has built. It’s using one of our Pro-150s driving a pair of electric scooter motors.
Here’s a prototype electric trials bike that a customer brought in today. Really powerful and very light, it’s using a Lynch motor and one of our 4QD-300s which we are modifying to give the required throttle response.
Here’s one of our Pro-150s driving the turret ring gear on a pretty serious looking Humvee. It’s a challenging application as it has to change direction rapidly, and the EMI and physical environments are hostile.
Seeing as how we’d melted our air cooled test load, we knew that we needed something that could handle some really high currents. Here’s a quick video showing how we built a water cooled dummy load.
This mighty machine has been built by Doug Wilkinson. It weighs in at 1200 lb and is using a 4QD-200.
I’ve just got to share this clip of Scarletts Ferrari, it’s using one of our DNO-10s and looks absolutely stunning. I guess that’s what happens when your Dad restores cars for a living – not that I’m jealous – oh no!
Follow the links to see some of the other fantastic cars he’s made.
Steve W sent us this picture of his Robot Wars contestant Gyrobot. It’s using one of our Porter 10XXs to control what must surely be one of the most powerful rotating energy weapons we’ve seen so far. We’ve made some mods for him to allow the current limit to be adjusted, and he’s also trying out a prototype heatsink arrangement to cope with the rather unusual power profile.
Mr B sent us this picture of a highly classified Xmas panto prop built out of a commercial scissor table with one of our Porter 10s driving a hydraulic pump.
Oh not it’s not……
…and here they are…. the first results for our new range of cooling options for the 4QD-300.
The finned air cooled heatsink gives approx 50% increase in performance and this can be increased further if a fan is fitted.
It’s the water cooling that we like the most though, it turns the 4QD-300 into a real powerhouse. More detailed results at higher currents to follow once we have uprated our test rig!
We’re still working out the pricing for these but please get in touch if you are interested.
Here’s a picture of our embryonic test set up for the soon to be launched water cooled 4QD-300. On the left is our current air cooled load cell, ammeter, and data logger. Front right is the 4QD-300 fitted with the water cooled heatsink. Right rear is the control and pump for the water. We’ve left space for a second pump which will be needed when our water cooled load cell is ready. Can’t wait to run this lot and see what results we get.
Jeff Ivers sent us this picture of his tow truck that he uses to haul a gravity racer to the start line.
Fitted with one of our Pro-150s
Here’s a sneak peak at our uprated 4QD-300X. We’ve had a custom heatsink made which really improves it’s ability to handle high currents for extended times. During testing it melted our test rig and was still only warm to the touch! Full details will be announced once we’ve built a new test rig.
The heatsink itself will also be available as an aftermarket upgrade.
We’ve also got a water cooled version coming soon that will take things even further, and be particularly suitable for electric boats.
Here’s a picture of MR Speed Squared, a 2016 Robot Wars competitor. Using 2 of our DNO-10s and a DMR-203.
Patsy brought a couple of PDQ Powertrikes to us with broken control boxes. We fitted one with a Porter 5, and one with a DNO-05 to see if we could get reverse, however we discovered that the motor has a one way clutch that prevents reverse from driving. The standard twist grips were swapped for our Magura throttles, and we fitted one of our key switches to the DNO for security.
Two weeks later Patsy sent us this picture of the neat bag she made to tidy it all up
And the verdict:….
"The power box is working briliantly, so speedy that I tend to do wheelies unless I am careful. The battery is lasting longer too........ Thanks again for doing a great job on the trike."
We love this video of a customer putting one of our Porter 10s through its paces…
Chris Sharpe sent us these pictures of his enduro bike. It’s running a 4QD-300 controller, Lifepo4 batteries, and an Agni 95 motor.
A big thank you to the Electric Boat Association for inviting us along on their trip around St Ives / Earith.
In the foreground is Cedric Lynch’s remarkable electric canoe. It has no batteries [apart from a very small one to “get under bridges”], uses a small Lynch motor, a model aircraft propellor, and one of our old 1QD controllers. Goes jolly fast it does too!
We hope you like the new look. We’ve tried to make it easier to find the controller and accessories that you need, whilst still keeping all the interesting information and technical support articles in a new knowledge base that makes it easier to find what you’re looking for.
All of our controllers are now on the range page.
In our new knowledge base we’ve sorted all of our old articles into some clear categories. All of the information about our old controllers is there, and a lot of background information about motor speed controllers. Our sister site 4qdtec.com still has all the reference and circuit information.
We’ve also added some application areas that show just a few of the areas that 4QD controllers are being used in.
We’d like to say a big thank you to Adam from Cambridge web solutions for his excellent work in creating the new site.