help wiring inverter to car ramp

[jpmiff]

Hi

pleased that you got it running, have you tried lifting a car at the max load?

 

[justin221]

no not yet got to put the hydrolic fluid in then see thanks

 

[jpmiff]

would you let us know how you get on?

 

[justin221]

hi guys just set the ramp up but the motor wont lift it the only thing i can think is i only have 145-148 v at each phase but do no how to increase it any help welcome thanks

 

[justin221]

hi guys on the inverter i have a dc bus + and - do i need to use these at all if so where do they go on the motor side thanks

 

[jpmiff]

Hi

is the voltage reading you are getting the inverter out put, if it is then the voltage is dependant on the speed you have set on the inverter, sounds to me that the speed is set too low, you will need to find out how to access the invertor parameters and alter speed.
The dc bus + and- may be a dc brake, does it not read dc brake + and - ? if so does not need to be connected

 

[jpmiff]

Hi

when you access the parameters check the accel and decel times , max torque and current.

the voltage to the motor from the inverter is not a true ac voltage!

 

[justin221]

thanks for the reply and yes it does read the brake i will have a play with the paramaters thanks and ill let you know

 

[justin221]

heres what the settings ar on
lin voltage. high accel time.0.1
carrier freq .10khz dec time 0.1
start method. normal min freq 0 max freq. 60 current limit 150% i have set the pot to 50 hzs
stop method. ramp
standard speed sorce. 0-10vdc

 

[pmac10]

justin, i know ive replied on this thread before but cant remember the details and im not reading 40 odd posts again, you say you have a 0-10V speed source, have you actually wired a potentiometer for speed control? if not, you may need to change that parameter, if the inverter is looking for a 0-10V input and one is not present it will read 0v which will correspond to your minimal speed, ie 0Hz, hence no movement, if im talking crap and overlooked something in previous posts feel free to let me know

 

[justin221]

i think thats what i have not sure as the unit was pre made by rotor motor but i assume you mean the dial that adjusts the freq and is displayed in the screen is there any way i can just set the inverter to just give me 3 phas at 50hz thanks

 

[justin221]

sorry double post

 

[pmac10]

yeah youre right, most inverters can be wired for a remote pot though which was what i was thinking of, set your minimum speed to 50hz and your maximum to 51hz and increase your ramp up time to maybe 2 sec, sorry if im repeating but what make is your inverter?

 

[pmac10]

just reread your parameters, you say youve set the pot to 50hz, what does that mean? is it possible youve set the speed source 0-10Vdc and the pot 4-20mA at 50hz??

 

[justin221]

no thats fine im bit new to this
its a ac tech sf250yf
ill just do it now and give it a go