Chapter 5 1
KYÕ THUAÄT NAÂNG –VAÄN CHUYEÅN
CHÖÔNG 5
CÔ CAÁU NAÂNG
(MOTIVE POWER OF HOISTING
MACHINERY)
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Chapter 5 2
1. DAÃN ÑOÄNG MAÙY TRUÏC
( motive power of hoisting machinery)
Daãn ñoäng maùy truïc
Daãn ñoäng tay Daãn ñoäng maùy
Ñoäng cô ñieän Ñoäng cô ñoát trong Ñoäng cô thuûy löïc
Ñoäng cô khí neùn
Ñoäng cô moät chieàu
Ñoäng cô xoay chieàu
Ñoäng cô xaêng
Ñoäng cô diezen
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Chapter 5 3
1. DAÃN ÑOÄNG MAÙY TRUÏC(tt)
a) Ñoäng cô ñieän (The electric drive)
Ñoäng cô ñieän 1 chieàu (a): kích
thích song song , noái tieáp, hoãn
hôïp
=> coù khaû naêng ñieàu khieån
cao nhöng giaù thaønh lôùn.
(D.c motor are provided in three
standard types by the way they
are excited. These are the
series motor, shunt motor, and
compound motor)
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Chapter 5 4
Ñoäng cô ñieän xoay chieàu (b): coù kích thöôùc goïn, giaù thaønh thaáp.
Loàng soùc: môû maùy baèng noái sao, tam giaùc (reû hôn) (5).
Daây cuoán: môû maùy baèng ñieän trôû phu (4)ï.
(Distinction is made between squirrel-cage (5) and wound- rotor
a.c. (4) crane motor
-The fact that the speed- torque characteristic of the squirrel- case
motor is flat as that as of the shunt motor in handling rated loads
indicated that the speed changes but little with load. Squirrel-
case motors are the most reliable and inexpensive a.c prime
mover.
-Wound motors are somewhat heavier and larger than squirrel-
case ones. At the same time, the losses of energy in windings
during the transient periods are smaller in the former than in
later)
1. DAÃN ÑOÄNG MAÙY TRUÏC (tt)
a) Ñoäng cô ñieän (The electric drive)
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Chapter 5 5
1. DAÃN ÑOÄNG MAÙY TRUÏC (tt)
b) Ñoäng cô ñoát trong
( internal combustion device)
Ñoäng cô xaêng (petrol engine)
Ñoäng cô ñiezen. (diezel engine)
=> Maùy coù phaïm vi hoaït ñoäng lôùn.
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