2PAC Mafia
Member
Hello guys,
I have a Kone board from speed variator which controls a motor of a lift. At installation my customer get "Motor Overcurrent" alarm and the system is blocked.
OK, I already had this type of board before and I replaced a lot of things, IGBT, predrivers, PWM control IC, etc, but nothing solved the problem.
Now again I have a board with the same problem and I´ve been focused on the current sensors, it has two CSLA2F sensors. The theory of this sensor is two pin power supply and one pin voltage output which goes to MC33172 amplifier and LM339. I´ve seen I have 9V supply on them when I give power to the board and as I can´t simulate the real output at U, V, W from IGBT I passed a cable through the sensor and I created a current. When I haven´t current through the sensor I have 4,48V output and when I pass some current up to 2A through it nothing happen, voltage at output is not changing on them. What do I do wrong?
Any good idea to test them properly?
Thanks.
I have a Kone board from speed variator which controls a motor of a lift. At installation my customer get "Motor Overcurrent" alarm and the system is blocked.
OK, I already had this type of board before and I replaced a lot of things, IGBT, predrivers, PWM control IC, etc, but nothing solved the problem.
Now again I have a board with the same problem and I´ve been focused on the current sensors, it has two CSLA2F sensors. The theory of this sensor is two pin power supply and one pin voltage output which goes to MC33172 amplifier and LM339. I´ve seen I have 9V supply on them when I give power to the board and as I can´t simulate the real output at U, V, W from IGBT I passed a cable through the sensor and I created a current. When I haven´t current through the sensor I have 4,48V output and when I pass some current up to 2A through it nothing happen, voltage at output is not changing on them. What do I do wrong?
Any good idea to test them properly?
Thanks.