Relativity book Relativity papers
Relativity IARD Tornado Supernova Fulltext paper Astronomical jets
Life Tiny dictionary Virtual editor Photographs of views Colors Contact

 TITLE: Regulation of rotational velocity
 AUTHOR: Porat, I. (1934-2012)
 SOURCE: D.Sc. thesis, Technion, Haifa, Israel (1966).
 LANGUAGE: Hebrew.
 SUPERVISOR: B. Popper (1927-2012).
 ADVISOR: Avraham Betzer (1919-2003).
 SYNOPSYS: The possibility for transferring power from a driving shaft that is rotating at uniform speed to a driven shaft also rotating at uniformspeed, has been investigated in this thesis. The rotational speeds are different and independent of each other.

Two basic solutions to this problem exist:

  1. The motion is transferred by mechanisms in which the speed ratio is enforced (toothed gears, etc.).
  2. The motion is transferred by mechanisms having several degrees of freedom such that their speeds are determined by dynamic conditions. This category includes, among others, the DC electrical motor and generator, which can be a good solution for those applications which permits its relatively large dimensions.
The purpose of this thesis consists of investigating the possibility of designing a torque converter operating on a dynamic principle, and examining its applications to the problem of regulating a driving system.

A general theory of power transfer within a non-divergent general mechanical system has been developed for this purpose. The system, in general, contains an arbitrary number of degrees of freedom of which two are applied to the driver and the driven mechanisms. It appears that the mechanical system has the characteristics of a differential. If a linear interconnection between speeds is maintained, the power transfer is achieved at a uniform moment ratio. As a consequence, at least three degrees of freedom are found to be required in order to transfer power from one shaft to the other at given rotational speeds. The adaptation of the third degree of freedom in accordance with the linear inter-connection requires a regulation process. This process can also be realized by means of friction. In this case, the qualities of the coupling properties are enhanced. It is then possible to couple two shafts at a certain speed ratio at high efficiency. The efficiency would decrease upon change of the ratio. This solution therefore has its limitations.

Another solution to the motion transfer problem is proposed in this thesis, which utilizes a gyroscope and a rectifying system for the power output oscillations. The interesting point of this solution resides in the fact that the rectifying is performed by the coupling of shafts rotating at the same velocity. The coupling is therefore a frictionless mechanical one.

This solution is characterized by the following interesting properties: the stabilization of the working point, accumulation of braking energy, self regulation of the speed in accordance with the load, slow coupling, and alternating the sense of rotation during motion.

Mechanical torque converters are preferable to electrical ones due to the possibility of transferring large amounts of power by relatively small-sized mechanisms. The limitations reside in high bearing loads and enforced vibrations


 11 references.


You may explore selected features of the host internet site

Links to selected features of the host internet site:

 Book on relativity Improving Einstein's relativity explains unsolved astronomical observations --------->
Order book: email

 Tornado Tornado mechanism and tornado source of energy - solved
 The source of life on Earth Breaking sea waves
 Supernova: Exploding star Bounceback of implosion solved
 Astronomical jets
 Three papers on relativistic rotation:          
 Additional three papers on relativity:          
 List of papers
 Tiny dictionary for touristItaly  Greece  France  Israel
 Photographs of views
 Virtual editor (Software)
 IARD International Association for Relativistic Dynamics
 COLORS  Selection of 150 internet colors with samples

Order book: email

Move over the photograph or click for more details

or click below for the page of the publisher:

Back to home page

Back to home page

בחזרה לדף הראשי בעברית

בחזרה לדף הראשי בעברית