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1983
Electrical motors are seldom used in robots. Less than one-half of all commercial robots are driven by electrical energy, but there are however many advantages from its use: 1. the necessary energy is delivered easily in a convenient form; 2.
François Lhôte +3 more
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Electrical motors are seldom used in robots. Less than one-half of all commercial robots are driven by electrical energy, but there are however many advantages from its use: 1. the necessary energy is delivered easily in a convenient form; 2.
François Lhôte +3 more
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Nature, 1954
IT has previously been reported that the corona in a point-plane gap to which is applied a steady d.c. potential (positive point, negative plane) consists of a series of short-duration pulses1,2, and this had also been observed by me. The results of English1, who used a photomultiplier to study the light emitted by the corona, show that this light is ...
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IT has previously been reported that the corona in a point-plane gap to which is applied a steady d.c. potential (positive point, negative plane) consists of a series of short-duration pulses1,2, and this had also been observed by me. The results of English1, who used a photomultiplier to study the light emitted by the corona, show that this light is ...
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Direct cell reprogramming: approaches, mechanisms and progress
Nature Reviews Molecular Cell Biology, 2021Haofei Wang, Jiandong Liu, Li Qian
exaly
1988
A unique feature of the current comparator is that it is capable of being used with direct currents. Thus the high accuracy and stability of turns on a magnetic core, which are the basis of many high-quality alternating current instruments, is also made available to direct current measurements.
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A unique feature of the current comparator is that it is capable of being used with direct currents. Thus the high accuracy and stability of turns on a magnetic core, which are the basis of many high-quality alternating current instruments, is also made available to direct current measurements.
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1998
DC motors are incorporated, of course, where direct voltage sources, e.g. in portable battery powered devices or in vehicles, are available. On account of their advantageous properties the range of application of the DC motor goes beyond these restricted boundaries.
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DC motors are incorporated, of course, where direct voltage sources, e.g. in portable battery powered devices or in vehicles, are available. On account of their advantageous properties the range of application of the DC motor goes beyond these restricted boundaries.
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1991
Historically, DC machines were the first to be developed because the only available electrical power source was the DC voltaic cell. The advantages of alternating current were later recognised, and the invention of the induction motor was an important factor in securing acceptance of the alternating current system.
openaire +1 more source
Historically, DC machines were the first to be developed because the only available electrical power source was the DC voltaic cell. The advantages of alternating current were later recognised, and the invention of the induction motor was an important factor in securing acceptance of the alternating current system.
openaire +1 more source