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How do you control the motor speed in an electric car that uses a 3 phase 460 volt variable speed aluminum motor with 400 horsepower?
Louisj
The standard method of speed control of three-phase motors is a VFD or variable frequency drive. Standard drives need AC power though. A quick look through ABB's catalog shows an ACS-550 drive good for 400hp weighs 504 lbs. and is 79 inches tall. Oops, not very practical for an electric car. The standard control algorithm for these drives would not have the right "feel" for an electric car as well. The accel/decel curves are all wrong. Do you realize that a 400 hp, 460V motor draws over 470 Amps? That's a whopping 374 Kw! Realistically, you are in the realm of $1,200-a-piece IGBT modules, six of them, with a custom designed, microprocessor-controlled driver. Oh, and one electronic engineer experienced in high-power power conversion design, and a software engineer too. The modules will probably have to be liquid-cooled. A quick calculation shows a bank of 54 12V lead-acid batteries each rated at 65 A/H would run this motor at full power for six minutes. Hope you have some exotic secret batteries in mind...
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What is control variable and manipulated variable?
a control variable is a variable that needs to be controlled
What are the similarities between a control and a variable?
There are not any similarities between a control and a variable. However, a Control Variable, is a variable.
What do controlled variable do?
You can control it that's why its called control variable.
What is a control variable in research studies?
A control variable is a variable that is held constant in a research analysis.
How do you control one variable at time?
who to control one variable at time
Is a variable that stays the same a constant independent variable or control?
Control
What is the difference of a dependent variable and an independent variable?
An independent variable is when you do not control what happens In an experiment,however; a dependent variable is when you actually control the experiment,
What is the difference of independent variable and a dependent variable?
An independent variable is when you do not control what happens In an experiment,however; a dependent variable is when you actually control the experiment,
What is the energy savings of an electric motor when reducing the speed with a variable frequency drive?
definitly it give more efficient than variable stator voltage.............but in variable frequency ...............the frequency is not only variable....it is E/F control.because to maintain constant flux......... USUALLY THIS SPEED CONTROL IS ODOPTING IN INDUSTRIES......
The variable that you control?
xh
What has the author Robert W Carrubba written?
Robert S. Carrow has written: 'Electrician's technical reference' -- subject(s): Alternating current Electric motors, Automatic control, Electric driving, Variable speed, Electric motors, Alternating current, Variable speed Electric driving, Variable speed drives 'Put a fan in your hat!' -- subject(s): Juvenile literature, Inventions, Children as inventors
4 uses of a variable resistor?
dim lights, tune in a radio on an analog radio, control heating elements in an electric stove, volume controls.
