Passenger Elevators
Passenger Elevators
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In our eReader you can find the full English version of the book. Read Passenger Elevators Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Passenger Elevators
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In stopping, the extra fields are energized, thus slowing down, and the armature circuited through these fields, producing a powerful yet gentle brake action, and bringing the apparatus to rest; current is then cut off the magnet brake, preventing further motion.
Alternating current, single-, two- or three- phase, is often used to operate elevators of the lighter powers. The switches are usually controlled by mechanical connections from the car, but when con- trolled electrically, rectified cur...rent is used to operate the control and brake magnets. The rectified current is produced either by aluminum cells or by a small motor generator. In starting, the current may be admitted in steps by resistance in the main line, and two speeds may be used by changing the field winding connec- tions so as to create double the number of poles.
Single-phase motors are restricted to single speed and very light duties.
For heavy elevator work, with alternating current, motor genera- tors or rotary converters and elevator motors of the direct-current type are generally used.
What to read after Passenger Elevators?
You can find similar books in the "Read Also" column, or choose other free books by Thomas E Brown to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
In stopping, the extra fields are energized, thus slowing down, and the armature circuited through these fields, producing a powerful yet gentle brake action, and bringing the apparatus to rest; current is then cut off the magnet brake, preventing further motion.
Alternating current, single-, two- or three- phase, is often used to operate elevators of the lighter powers. The switches are usually controlled by mechanical connections from the car, but when con- trolled electrically, rectified cur...rent is used to operate the control and brake magnets. The rectified current is produced either by aluminum cells or by a small motor generator. In starting, the current may be admitted in steps by resistance in the main line, and two speeds may be used by changing the field winding connec- tions so as to create double the number of poles.
Single-phase motors are restricted to single speed and very light duties.
For heavy elevator work, with alternating current, motor genera- tors or rotary converters and elevator motors of the direct-current type are generally used.
What to read after Passenger Elevators?
You can find similar books in the "Read Also" column, or choose other free books by Thomas E Brown to read onlineMoreLess
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