It Spins

After several weeks of designing and awaiting parts, not to mention a broken humerus, the controller is mounted and wired to the transmission.

This shot shows the controller on top of the transmission.  A few details:

• Kelly KHB72701 controller - 700 Amps, 90 Volts opto-isolated controller
• 600 A contactor with protection diode across the contactor coil
• 2K 10W pre-charge resistor across the contractor contacts
• PB-6 with microswitch for throttle control (add to add 3rd wire to potentiometer)
• 2/0 AWG welder wire to carry the power along with 1/2 crimped lugs
• 800A Fuse
• 2 x 2A fuses for controller and the contactor
• 18V and 12V power supplies to isolate the controller (18V) from the contactor (12V) and batteries (24V, eventually 77V)
• A couple of switches to manage the reverse function and contactor power
• Motenergy ME0913 motor with thermistor (KTY84-130) attached with 1K resistor as a voltage divider

After lots of crimping and cutting, we powered up the system, connected two old car batteries and sure enough it spins.  The throttle worked, the reverse switch worked and the motor sounded quite normal.  The transmission is dry at the moment, so we didn't spin it faster than a couple of RPM.

After reading about all of the problems people have had, it was a surprise that things worked out of the gate. Though I shouldn't be since this was assembled as the manufacturers suggest.

Next up....

Finish sealing the transmission and put in some transmission fluid to allow it to spin full speed.   Then the planning starts for the engine swap.