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Fantastic Motor Control Panel Wiring Diagram Gallery Electrical Fine At Motor Control Panel Wiring Diagram - There are three extra contactors. The f (ahead) and r (reverse) contactors (pinnacle middle in the photo) are controlled by a dash-set up forward/opposite switch, and connect the motor's series area for forward or reverse. The ch (charge) contactor is directly managed by means of the keyswitch; on to power, off to price.
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The schematic is an ev controller from 1968 (motorola utility observe an-189). It is designed for a golfing cart with a 36v %, and brought as much as two hundred amps. A single transistor large enough to address that lots current was very luxurious; in order that they used 9 less expensive 759af83dbac04511979469e6f58100a3 transistors in parallel (a trick that is nonetheless being used nowadays). Be aware the impressively huge rcd snubber across the transistors.
Internal: to open the case, get rid of the 6 screws from the lowest cowl. The left photograph shows the view with the lowest cowl removed. You may see the big blue enter capacitor c0, and three hundred amp freewheel diode d1 (the black rectangle at the lowest). Lm317t voltage regulator u2 is standing up on the decrease proper corner of the board.
Evs are not anything new; they have got been round for over a hundred years! The earliest controllers honestly used switches and resistors to directly manipulate motor pace. The photograph is the throttle switch from a completely old ev. The throttle pivots an arm that incorporates a wire with a spring-loaded sliding contact (top). A set of fixed contacts are arranged in a semicircle below it. As the throttle is moved, the sliding touch connects to at least one or more constant contacts to pick out the motor pace. Note the size; the contacts needed to be big, because they switch the entire motor modern and voltage.