does anyone carry a 12vdc 30amp bulletproof h-bridge or reversible motor control

sport270

Looking for a industrial 12vdc 30amp motor control .
Need to have reversible control of a 12vdc @30amp motor.
Will be controlled by a bs2 & momentary switch.
Will be mounting 4 controls in a weatherproof box on Ag equipment.
Thought about something like the atv winch contactors, or the solid state relays like Crydom..... but haven't found anything suited for the task.
Ultimately need approx 50 units . Thanks for any ideas or options.
Jeff sport270@yahoo.com

Seairth

Are you just looking for SSRs or motor controllers? VEX makes a number of motor controllers that might meet your needs. I don't know if I'd call them industrial, but they certainly work well for robotics challenges. For a start, take a look at http://www.vexrobotics.com/217-8080.html.

Note: "weatherproof box" leads me to think that there will be no significant airflow for cooling the motor drivers. You may want to look at models that are specifically designed for passive cooling.

sport270

SSR is more likely what I need. As I don't need to change speed. Just need on/off and reverse polarity.

tonyp12

http://www.mouser.com/ProductDetail/STMicroelectronics/VNH3SP30-E/?qs=sGAEpiMZZMtKB4wrjsn3laiJpF7ZFXEjhDgBLATkjcA=

At those high amps, probably best option is to get a gate driver and supply your own 4 mosfets.
Good drivers include chargepump (or the simpler boot strap) so it can use n-mosfet on the high side too.

Can you handle qfn24?
Brushed DC Motor Full-Bridge Gate Driver:
http://www.mouser.com/ProductDetail/Texas-Instruments/DRV8701PRGET/?qs=sGAEpiMZZMtKB4wrjsn3lVL61jBPk/R7HteWO4H5wxk=

Phil Pilgrim (PhiPi)

Ready-made heavy-duty ESCs are so cheap, it doesn't make sense to roll your own, even if you only need on-off-reverse switching. Take a look at these prices:

http://www.hobbyking.com/hobbyking/store/__453__182__Speed_Controllers_ESC_-20_to_39_Amp.html

-Phil

Peter Jakacki

From your thread title wording and the use of the word "carry" it sounds like it is saying "does anyone carry a 12v 30amp bulletproof [vest]"

Gate drivers are designed for speed of switching which is important for PWM but you don't need that plus these drivers normally need to continually PWM the inductive load to get their boot. However you will find that even a simple little up-converter to 18V will allow simple opamps to driver the high-side N-channel MOSFETS. This way you can use rugged N-channel devices through-out however you need to allow for startup and stall(ing) current which can be very much higher.

I use some TO220 MOSFETs rated at 110A max which of course you could never run it anywhere near that except for those brief overloads after which I would use a polyfuse. However you may need to softstart the motor with a very low frequency PWM method depending upon the motor load. It is also good to be able to monitor the bridge output in case of a stall or polyfuse trip, you only need a simple resistor divider back into the Prop which will tell you if there is voltage on that arm of the bridge or not. Need a circuit?