You are working as a design engineer at a motorized wheelchair manufacturing com

Question

You are working as a design engineer at a motorized wheelchair manufacturing company. Your design team is developing a new product with 300 lbs. payload capacity, driven by two 24-V motors, each rated 200-W. You are assigned to design a converter with adjustable output voltage to supply the motors from two 12-V batteries. Your goal is to design a reliable and safe product for full-time indoor and outdoor use. The switching operations should not cause interference with digital audio devices and radio interference above 500kHz electromagnetic waves. In addition, the output voltage ripple must be less than 0.5% to avoid risk of interference with medical electronic instruments. or tisr aithe sequtremmecications,constraints, an 2. (30) a. b. How would you arrange the batteries? Based on the battery configuration and output requirements select a converter type Discuss the benefits and drawbacks of your choice. c.

Explanation / Answer

A. Batteries should be connected in series. Since the input voltage is 12 only but the requirement is more ie 24 volt.

B. Since the complete rating of battery is not provided so directly can not comment. But if we take only two batteries then step boost converter will be best.

C. It have the same no of components as compare to the buck boost which has almost same voltage boosting level.

It does not have any isolation between input and output.

It can not step down the voptage level if the supply is exceeded(in case more batteries used)  

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