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hi,adax811 said:but i getting 130VDC or 100VAC when i tapping on C and D using multimeter.
im not understanding how the voltage come...... and the YS2 is a magnetic coil. are they (VD3 and VD4) act as anti reverse-current? so that the output should be DC? but i had been told that the output should be AC. i'm confusing......
adax811 said:but i getting 130VDC or 100VAC when i tapping on C and D using multimeter.
adax811 said:ya. the coil is connected to a 3 phases motor. and act as a brake for the motor...
Is the coil in such a position that it is electromagnetically coupled to the 3 phase motor winding.? In other words is it designed to pickup the field from the motor.?
what the meaning about unipolar or bipolar depending on its construction?
explain further pls..... thx
Unipolar is when the coil is designed and positioned to pickup and output a pulse that goes from 0V to a +V [or -V], one direction, a halfwave cycle,
Bipolar is when the picked up pulse goes to +V and then down thru 0V and to a -V.. A fullwave cycle
im using a digital multimeter...... boths also giving reading ( standstill ).
ya. both...... 130 VDC+/- and 100 VAC+/-........... and the resistance for the coil about 0.46 ohm +/-.....
A half cycle pulse will give a ac and a dc reading on a DMM.
Your 130Vdc and 100Vac suggest that its a positive goind unipolar pulse ocurring every half cycle.
are R1 and R6 resonantor..............
Do you mean resistor.?
all experts are welcome.......
adax811 said:these are the R1 and R6......
i do not have an oscilloscope...... @@
in the other hand, do we have alternative way to solve this?
normally the brake coil would be DC or AC? and the Currrent supply must be?
adax811 said:ya...... i also confuse that y the circuit do not have return path......
the "BOX" which u drawn, not a component. that is a board number which i can say as ID/location for the cuicuit for the brake system.....
ya...... bcoz the brake is not working well...... intermitent........ headache......
is possible the current not enough?
adax811 said:sry that i have been busy for awhile...... i think ur explaination i could accepted...... i think the circuit diagram is not complete...... as u've said, the 2 diodes are giving half circle current supply to the motor and the missing dot-line should be there. so that the coil can function. about the thermistor, can u explain the characteristic in this circuit? act as prevents large currents from flowing at turn-on?
hi,adax811 said:i no hv the diagram for the coil but i got the description for the coil. the name is magnetic brake coil only.