SENSE101xPowerPoint template and guidelines - charcoal v0.8

EFFICIENCYPresented by: Surya P. N. Singh ( http://spns.com )

TODAY…MAXIMIZING η !

• Want to get more drive power with less cost?

• What are the limits of efficiency?

• Did you know that a 2007 Toyota Camry can out accelerate a 1968 Pontiac GTO?

EFFICIENCY!

MOTOR POWER• Motor Power is given by:

• Max power at

MOTOR EFFICIENCY• η=mechanical power / electrical power

MOTOR EFFICIENCY

SUMMARY OF ELECTRIC MOTORS

Servo Motor Advantages Disadvantages Applicable capacity

DC servo motor: (e.g., VR, stepper)

Easy to use, Low priced control device

Brush replacement. Has restrictions in respect of operating environment

0.1 - few 100 Watts

Brushless motor (PM synchronous) Synchronous motor (vector control)

No brush maintenance Excellent environment resistivity

Control device is expensive due to its complexity Detector is necessary

from few W to few kW

Induction motor (vector control)

Durable construction Complicated control system

More than few W

Stepping motor Open loop control, large static torque

Dropped out of step. Large weight/capacity ratio

Below few 10 W

THE POWER OF η• More Power• Less Money!

• Let’s Maximize η

η

WRAP-UP• The future…

• Research is the key to development

• Let’s see where efficiency can take us!

Unless otherwise stated all content is available for use under the creative commons license Attribution-ShareAlike

Attribution# Title License Source Creator Contact

1 Attribution Name CC-BY-NC-ND youtube.com/user/sense101x A. Nomedplume enquiries@uqx.uq.edu.au

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