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Mott Chapter 21 - Chapter 21 Electric Motors and Controls...

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1 Chapter 21 Electric Motors and Controls Electric Motors Electric motors are an efficient means of converting energy: Electric motor = 50-80% efficient Diesel engine = 40% efficient Gasoline engine = 25-35% efficient Advantages Electric motors have many advantages: Low cost and inexpensive to operate Easy to start Automatic/remotely controlled Long life (35,000 hours) Low noise, no exhaust – Compact
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