DC injection braking is a method of slowing down a motor with electricity and no mechanical brake. It is done by disconnecting AC power from the stator windings, and connecting DC while the motor is spinning. This creates a stable magnetic field on the stator in which the rotor continues to spin. The magnetic field…
I believe authentic assessment is the gold standard in assessment. If a skill can be demonstrated in the classroom, the best way for students to show learning is to ask them to actually perform that skill. To that end, this is an example of a PLC unit final project I’ve used in the past. This…
In partnership with TRU Sustainability and BC Hydro, a small group of instructors at TRU are working to convert a 2001 Chevrolet Astro AWD service van to an electric vehicle. This is an ongoing project, but the introduction video can be seen here:
This project was conceived as a way to get students to feel what watts are. Starting from a donated stationary bike frame from Kamloops Bike Riders’ Association, I created this interactive teaching aid. Most students can understand that voltage is electrical pressure and amperage is the flow of electrons. Mathematically, we know: P = EI…
This demo is used to show how an electric vehicle energy management system (EVEMS) functions to allow the addition of an EV charger, while not overloading an electrical service that would otherwise be too small. The demo is interactive, giving students an appreciation for how these systems switch loads dynamically according to overall current draw…
This video was created to show the steps in doing a modern, 3M cold shrink high voltage termination. There is an accompanying board which shows the termination in various stages of completion, seen here: Electrical Colleague, Keith Bancroft is featured in the video showing all stages of the termination.
This piece of equipment is a 3-phase motor directly coupled to a DC machine. It is typically used to show both AC and DC power generation. It has a see-through cover so the inner components of the rotating machines can be viewed. Normally this machine would require a 3-phase power supply with a variable DC…