{"id":366,"date":"2019-04-05T16:07:55","date_gmt":"2019-04-05T16:07:55","guid":{"rendered":"http:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/?p=366"},"modified":"2019-04-05T16:13:11","modified_gmt":"2019-04-05T16:13:11","slug":"electrical-subsystem-pcb-design","status":"publish","type":"post","link":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/2019\/04\/05\/electrical-subsystem-pcb-design\/","title":{"rendered":"Electrical Subsystem\/ PCB design"},"content":{"rendered":"

The following is an outline of the electrical subsystem of Soteria and the power distribution PCB.<\/span><\/p>\n

The electrical layout of Soteria can be seen in Figure 1. \u00a0A 48V 20A power supply provides power to two motor controllers, each of which power\/control two motors. \u00a0The 48V is routed routed from the supply to a relay, then to the terminal block where it will be distributed to the 2 motor controllers. \u00a0The motor controllers are connected to the Jetson (the processor) via RS232 communication protocol.<\/span><\/p>\n

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A 12V 2A power supply provides power to the PCB which is distributed to the Jetson, Arduino, and kill switch. \u00a0When the kill switch is activated it opens the relay causing power from the 48V power supply to be disconnected from the circuit. \u00a0This will cut power to the motor controllers and motors, therefore preventing actuation of the exoskeleton. Three IMUs are connected to the Jetson via USB. \u00a0These IMUs are powered via the Jetson. Lastly an Arduino is powered from the PCB, this is available for add on capability, however in the current design it is not used.<\/span><\/p>\n

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Fig 1:\u00a0Electrical Schematic of Soteria<\/span><\/span><\/p>\n

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The power distribution printed circuit board (PCB) houses the relay and terminal block to distribute the 48V 20A to the motor controllers\/motors. \u00a0It also distributes 12V 2A to the Jetson, Arduino, and kill switch. Figure 2 shows the final board layout and Figure 3 shows the wiring diagram of the board. \u00a0A diode is used for reverse voltage protection, and a status LED is used to indicate 12V is being provided to the board. <\/span><\/p>\n

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Fig 2:\u00a0PCB board layout<\/span><\/u><\/p>\n

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Fig 3:\u00a0PCB wiring diagram<\/span><\/span><\/p>\n

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Data Sheets for all components<\/a><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

The following is an outline of the electrical subsystem of Soteria and the power distribution PCB. The electrical layout of Soteria can be seen in Figure 1. \u00a0A 48V 20A power supply provides power to two motor controllers, each of which power\/control two motors. \u00a0The 48V is routed routed from the supply to a relay, Read more about Electrical Subsystem\/ PCB design<\/span>[…]<\/a><\/p>\n","protected":false},"author":141,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-366","post","type-post","status-publish","format-standard","hentry","category-pcb-information"],"_links":{"self":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/posts\/366","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/users\/141"}],"replies":[{"embeddable":true,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/comments?post=366"}],"version-history":[{"count":5,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/posts\/366\/revisions"}],"predecessor-version":[{"id":374,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/posts\/366\/revisions\/374"}],"wp:attachment":[{"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/media?parent=366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/categories?post=366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mrsdprojects.ri.cmu.edu\/2018teamb\/wp-json\/wp\/v2\/tags?post=366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}