I have a NOS Crystalyte 5303 front hub motor. I thought it would be interesting connect it to a cheap 72V 1500W Sunwin controller. Bench test was smooth. On the street it was more than interesting; actually a little scary but the bike died climbing the first hill. Turns out one of the motor hall sensor died. And...the controller also quit! I chalked it up to a bad combination. I replace the bad hall sensor and bench tested the motor with a "Brushless Tester" and then with a Crystalyte 48v40a controller. All good, so I stored the fixed 5303.
Now I want to use the 5303 on a tandem. I get it out and test it with the "Tester". Phase wires, fine. All 3 hall senors, bad. When all 3 Halls don't work it's usually a broken power (red or black) wire. But no....4.85V measured at all 3 hall sensor's pin 1&2. A magnet near each hall doesn't trigger the tester's LED. A new hall connected to the tester triggers when a magnet is close, so the tester is good.
What fried all 3 hall sensors? I'll replace them, but how do I prevent a repeat.
I think the Crystalyte 48v40a controller works on motors with or without hall sensors. Could it have fried all 3 hall sensors and then continued to work in the sensorless mode? I'm lost.
Now I want to use the 5303 on a tandem. I get it out and test it with the "Tester". Phase wires, fine. All 3 hall senors, bad. When all 3 Halls don't work it's usually a broken power (red or black) wire. But no....4.85V measured at all 3 hall sensor's pin 1&2. A magnet near each hall doesn't trigger the tester's LED. A new hall connected to the tester triggers when a magnet is close, so the tester is good.
What fried all 3 hall sensors? I'll replace them, but how do I prevent a repeat.
I think the Crystalyte 48v40a controller works on motors with or without hall sensors. Could it have fried all 3 hall sensors and then continued to work in the sensorless mode? I'm lost.