GoldenMotor.com Forum

Hi everyone,
I am new to this forum and need some advise. I have just converted my 22 ft displacement cabin cruiser from diesel to electric. The setup is a direct drive 10kw 72V bldc Golden motor with EZKontrol 721000 controller. The battery is 24 X 314ah cells in series with jk bms. The system operates smoothly but not reaching potential displacement hull speed. The maximum motor speed at full throttle is only about 700rpm and the bus current approximately 25A. Are there any controller settings that might increase the rpm or will belt reduction gearing and/or a smaller propeller with less pitch be required. The motor revs freely with the propeller shaft disconnected.

Hi Marcogi andto the forum.

Unfortunately, I have never had my hands on a HPM5000 motor to dismantle, but I have attached a photo showing the inner components of the air cooled  HPM5000B motor which should give you a good indication of how the air cooled version will come apart.

However, after watching this video, the water cooled version looks like it may be a lot more involved to remove the rotor and stator assembly if the front and main body casing is all one piece.

It looks like you would have to somehow remove the cable glands and then feed all the wires inside the casing before being able to press out the rotor assembly from the front casing.

Just a thought, but if the threaded mounting bolt holes go all the way through the front casing it might have physically locked the rotor if long mounting bolts have been used as their tips may be touching against the steel rotor.

Alan
 

Planning to install a Goldenmotor Magic Pie rear hub drive on a recumbent trike, and looking forward to being a part of the GoldenMotor forum!   Thanks!    Wayne

Hi, I just converted a friends trike to e-trike and am now researching all things related to e-motors.
Been an electronic technician since 1985.

Hi andto the forum.

Did the three LEDs on the throttle all light up when the battery was connected and turned On? If the LEDs were not lit up, it could be a battery problem.

If the motor has been completely submerged in water, the motor's controller and bearings may have been affected by short circuits or corrosion, especially if it was salt water.
However, if the wheel still rotates easily by hand, the stator and magnets may still be salvageable, but the motor would need to be dismantled to see the full extent of any water damage to the magnets, the laminated steel stator assembly and possibly the steel legs on the Hall Sensors.

If the entire trike has been under water, there's also the possibility that the water might have affected the throttle and/or the various connectors on the wiring harnesses as well.

Start by carefully checking all the connector pins for signs of water residue or corrosion, especially the 5 pin throttle connector and the main 10 pin connector between the main harness and the motor harness.
If you find any water residue, clean and dry the connectors thoroughly and see if it makes any difference.

Unfortunately, the controllers have been known to fail if water gets inside them, but you would have to remove the controller assembly to check for any signs of water being inside the controller. .

Alan