Briefly explain the differences between a brushed and a brushless DC motor.

What will be an ideal response?


A brushless DC motor like a brushed DC motor, but the purpose of the rotor and field windings (stator) are reversed. The rotor is made up of a set of permanent magnets and the stator has controllable electromagnets. A brushless motor has no brushes and no commutator. An electronic circuit switches current flow to the different stator’s windings when needed to keep the rotor turning. The reversing of current flow through the windings is done by power transistors that switch according to the position of the rotor.

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A ____ is a winding that is connected to the source of power.

a. filament winding b. secondary winding c. Kai winding d. primary winding

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There is a 5.00 _______along the south property lines, and an 8.00?________along the north property lines of Lots______through______.

Fill in the blank(s) with the appropriate word(s).

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PIC-100 controls the system pressure at:

a. 50 psig b. 100 psig c. 125 psig d. 225 psig

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A welding process for joining materials that employs molten metal to permanently join the conductors together is called __________ welding.

a. stick b. thermal c. exothermic d. cohesive

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