190303i Flashcards
Functions of a final drive
Final gear reduction
Torque multiplication
Support the weight of the unit
Three configurations of final drives
Planetary sets
Chain drives
Bull gears
Advantages of outboard planetary sets
Axles can be smaller
Maintenance friendly
Advantages of a chain drive final drive system
- greater ground clearance
- cheep and efficient
- positive drive between front and rear wheels
What type of planetary does a chain drive have?
An inboard planetary
What are the advantages of an AC Drive system versus mechanical
- Instant power
- less moving parts
- no leaks
- no power loss as you drive train
- better weight capacity
- less breakdowns
Disadvantages of a c drive systems
high-voltage
Electrician has to hook up and disconnect
What is dynamic braking
Dynamic braking is when the motor becomes a generator and then pushes the power from the generator inti series of resistors slowing the motor down
Why does spur and bull final drives have to be large
Because spur gears only have one or two tooth in contact with each other
Formula for planetary ratio
Sun plus ring gear over sun gear
What does a rectifier do
Changes AC voltage to DC voltage
What does inverter do
Changes DC voltage to AC voltage
How many magnetic fields does a A/C motor create
2
What component on a A/C motor is power delivered to
The stator
