Society of Robots - Robot Forum
Electronics => Electronics => Topic started by: dell on August 01, 2008, 12:14:34 PM
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Any motor driving ICs available for 5 ampere motor driving, with pwm and bidirectional control required. On the ST website under motor controllers i could find stuff only upto 2.8 amperes, and then directly above 30 amperes for automobile motors. Any specific recommendations?
The above is required for hobby purposes, so i can do without all the large temperature ranges etc.
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Don't know what your voltage requirements are, but I was directed to Pololu for my motor controllers and so far I'm happy.
http://www.pololu.com/catalog/product/120
This is the one I picked up but they do have more for all types of voltages and Amperage.
Help this helps.
- Bill
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Do you need a continuous 5 A or are you talking about a motor with 5 A stall? If your motor has a stall current above 5 A, what is is it?
The MC33887 motor driver carrier (http://www.pololu.com/catalog/product/711) and dual MC33887 motor driver carrier (http://www.pololu.com/catalog/product/712) can deliver 2.5 A continuous per channel and can handle 5 A peaks for a few seconds before overheating (you could improve this by adding a heat sink and/or improved air flow). We also offer the TReX Jr dual motor controller (http://www.pololu.com/catalog/product/767), which offers a number of advanced features and is based on the MC33887.
If you need more current (e.g. 5 A continuous), you could consider the VNH2SP30 (http://www.pololu.com/catalog/product/537) or VNH3SP30 (http://www.pololu.com/catalog/product/128) (these are probably the 30 A automotive drivers you saw on ST's site). We sell convenient single (http://www.pololu.com/catalog/product/706) and dual carrier boards (http://www.pololu.com/catalog/product/708) for these motor drivers that are capable of 14 A continuous (9 A continuous for the VNH3SP30 version) per channel with 30 A peaks. These carrier boards are quite popular for high-current applications. We also have several advanced motor controllers based on the VNH2SP30 and VNH3SP30 drivers:
TReX dual motor controller (http://www.pololu.com/catalog/product/777)
SMC04 high power motor controller with feedback (http://www.pololu.com/catalog/product/425)
Orangutan X2 robot controller (http://www.pololu.com/catalog/product/738)
- Ben
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If a motor is meant to run at 1A and stall at 3A would it work to put at say 1.5A fuse to save your parts?
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Probably not well. You should make sure you choose parts that can tolerate 3 A for short durations if your motor has 3 A stall. A lot of motor drivers have over-current and/or over-temperature protection built in, but in certain situations the damaging current spikes can occur faster than the protections can kick in.
- Ben
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I'm sorry i missed out on the voltages, i intend to run the motors on 15 volts, and yes, the stall current is 5 amperes (with safety margins), with running being close to 2.5 amperes. I need H bridge operation along with pwm.
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Then the MC33887 (http://www.pololu.com/catalog/product/711) I mentioned in my earlier post would probably be your best bet. It works up to 28 V and accepts a PWM input.
- Ben
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http://www.dimensionengineering.com
and
http://www.societyofrobots.com/robot_parts_list_electronics.shtml