DPDT relay specifications

[p.gholap93]

I have designed a motor driver using DPDT relay. My motor ratings are as follows-
Voltage-24V
Power-150W
RPM-150
Motor takes peak current of 12A when there is immediate transition from stop to full forward/reverse. During continuous run it takes current around 2A. In my application I need such instant transitions more frequently than the continuous run. What should be the rating of my relay (like coil voltage and contact current)? I have got this one-

 

[Reloadron]

How about a link to the relay data sheet, I can hardly read that image.

Ron

 

[p.gholap93]

I can hardly read that image.

Ron

Well, its 12V(DC) and 5A relay. My motor is PMDC so I am not considering AC ratings of the relay.

 

[Reloadron]

The coil is a 12 volt coil. Yes, I see the contacts are rated 30 volts at 5 amps DC. Based on your post I would not use it. Generally a 12 volt coil automotive relay can be had cheap and handle 30 amps. I would look that way. Also if the motor will only turn in one direction (same polarity all the time) I would place a fly back diode across it.

Ron

 

[xainnasir]

I have recently done such a project .... my motor ratings were 40V ,10A ,300 RPM and i used FETs to control the speed and relays for direction control .......

 

[p.gholap93]

I have recently done such a project .... my motor ratings were 40V ,10A ,300 RPM and i used FETs to control the speed and relays for direction control .......

I am talking about the same circuit. Can you please tell me your relay specifications?

 

[Reloadron]

I am talking about the same circuit. Can you please tell me your relay specifications?

The last post (Post #5) used FETs and not a relay. Also I had suggested:

Generally a 12 volt coil automotive relay can be had cheap and handle 30 amps. I would look that way. Also if the motor will only turn in one direction (same polarity all the time) I would place a fly back diode across it.

If you want to use relays get a few automotive relays designed for the higher current DC loads.

Ron

 

[xainnasir]

I am talking about the same circuit. Can you please tell me your relay specifications?

I have used FETs for speed cntrl n relay for direction and therez no much specs for relay i mean its just for switching and as the system is totally isolated so u just find a little heavy relay .... not much difficult