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Power Amplifier

Figure 3: Power amplifier board.
Image ./images/poweramp.jpg
The power amplifiers being employed are high current, high voltage H-bridge type motor controllers. These modules are based around the National Semiconductors LMD18200 H-Bridge modules. These driver boards were designed , assembled and tested as part of a previous project but will work quite well for this project. These boards are capable of driving two motors in bidirectional mode at a current of up to 6 amps continuous. A dynamic break is available for emergency situations. This will allow the motors to be stopped within a fraction of a revolution at the risk of damaging the drive train by stripping sprockets or bending the drive shaft. Figure 3 shows the assembled power amplifier board. The previously described control module will generate all the required signals to run these amplifier boards.

Jordan Reynolds 2003-05-29