Hi All,
I am a newbie please be patient. I am trying to re-purpose a lift mechanism that has a Panasonic single phase induction motor with a nice gear box. It is already set up with a driver board with relays for CW/CCW rotation. In fact the entire mechanism is exactly what I need for my project. It was a part of an Altmega controlled system.
If you look at the pictures attached, the brown and white wires are the 110v power. The Black, white, and grey are the motor connections. The Orange and blue are the input for the cw/ccw and the violet and grey are the limit switches.
Can anyone direct me to design a sketch with pinout to control this thing? I really do not want to design a complete new relay setup since this one is intact. I have the schematic from Panasonic as well.
I have the schematic from Panasonic as well.
It would make more sense to post the schematic instead of a picture of some relays and a motor.
How to post images to the forum so they don't need to be downloaded.
Panasonic schematic
Panasonic schematic
Nope.
Panasonic schematic Sorry, had to edit to make smaller file size.
So... What, logic 1 clockwise, logic 0 is anti on the orange and blue?
Or is it mains on those wires for clockwise and no mains for anti?
Short for clockwise, open for anti?
The pics you have posted aren't especially helpful. In the setup where would the orange & blue wires go? To a selector switch?
Please research motor types. An induction motor cannot be reversed because of the fixed pitch of the windings on the armature.
Your description and the schematic show a split-phase motor with an AC capacitor providing the phase shift to the winding allowing motor rotation. Switch the capacitor and power wires and the motor will turn the opposite direction. You will need a DPDt relay to do this.
Paul
fall-apart-dave:
So... What, logic 1 clockwise, logic 0 is anti on the orange and blue?Or is it mains on those wires for clockwise and no mains for anti?
Short for clockwise, open for anti?
The pics you have posted aren't especially helpful. In the setup where would the orange & blue wires go? To a selector switch?
From what I have discovered the three relays on the board were tripped in succession at different points of operation. The Orange and Blue were inputs from an up, down keypad. (This is a scissor lift) All of which were controlled by an Altmega chip board. At different points of movement switches were pressed or proximity switches were engaged and the motor changed direction.
I think I have to abandon the use of this board and just make my own. I have experimented with a different relay today and found moderate success. Now that I understand that I should be able to write a code to provide and interrupt the 24v feed to the relays in order to obtain the operation I want.
Sewtech,
Easy as .... motor shown will run in either direction with the circuitry shown no worries.
You need to retain the capacitor as shown as it becomes a start capacitor. By having the cw/ccw switch in one direction, the grey winding will be the start and the other (black) the run.
If you have originals they can be used or if not, regular relays can be used or indeed a manual switch. Up to you just make relays of a size to suit the motor.
When youchange the cw/ccw switch to the otherside the black winding now becomes the start and the other(grey) the run.
No real need for the start/stop controls and relays. Make the white wire the neutral of the incoming main and switch the feed to the input of the cw/ccw relay contacts to make motor turn “on-off”.
Sorry not at my pc to upload a drawing which would have made explanation easier.
Let me write it one more time. The capacitor is a phase shift capacitor. The winding out phase makes the motor rotate. It is never removed from the circuit as a starting capacitor is done.
Paul
OP: You really should explain that you're posting disjointed pieces, that the schematic does not match the photo.
The schematic shown has one relay coil (RY) and three normally open contacts. The schematic clearly shows the RY coil powered by 120V AC.
There are three physical relays on the board photograph. That looks okay until you see that all three have 24vdc coils.
If you don't have a schematic of the complete unit that matches the photo of the circuit board, it would be most helpful to post photos of the bare board, top and bottom so that we can reverse engineer what you have. Otherwise, it's just guessing.
Paul_KD7HB:
Let me write it one more time. The capacitor is a phase shift capacitor. The winding out phase makes the motor rotate. It is never removed from the circuit as a starting capacitor is done.Paul
Yes, that is exactly what I said. The cap stays in circuit and direction of the motor is wholely and solely dependant on the winding it is connected to via the cw/ ccw switch.
Many examples of this are present in small washing machines.
You can argue back and forth on what it constitutes but the out come is as I explained before.
Wow thank you all, and AVR_Fred here is a pdf with photos of the board and motor schematic. I would love to reverse engineer this thing so that I could build another to use in my project.
Panasonic motor control board.pdf (769 KB)