Power supply system

Abstract

The present invention provides a power supply system that is superior to existing systems. Provided is a power supply system that supplies, via a shaft that is supported by a first bearing and a second bearing, power to a prescribed load from an alternating current power source, said power supply system making it possible to transmit power mutually between a body (15) and an outer conductor of a rotating shaft (2) via a first coupling capacitor that is composed of a sliding bearing outer ring (11) and sliding interface (13) of the first bearing, and the outer conductor of the rotating shaft (2), and also making it possible to transmit power mutually between a connecting conductive wire (14) and an inner conductor (9) of the rotating shaft (2) via a second coupling capacitor that is composed of the sliding bearing outer ring (11), sliding interface (13), and sliding bearing inner ring (12) of the second bearing.

Description

technical field [0001] The present invention relates to an electric power supply system for supplying electric power to various loads. Background technique [0002] A power supply system that supplies power to a load installed on a rotating body can generally be broadly classified into a contact type power supply system that supplies power by contacting an electrode exposed on a rotating body from the outside. ; and a non-contact power supply system, which does not need to be in contact with electrodes provided inside the rotating body in a non-exposed shape to supply power. [0003] Among these, the conventional contact type power supply system is disclosed by patent document 1, for example. In this system, electrodes called slip rings are provided on the rotating body, and electrodes called brushes are provided outside the rotating body, and these slip rings (sliprings) are brought into contact with the brushes, ... power transmission. [0004] prior art literature [...

AI Technical Summary

Problems solved by technology

Therefore, when wetted by water, especially when rotating at high speed, the water film will enter between the collector ring and the brush, resulting in a decrease in power transmission efficiency

[0010] 3) Since the collector ring and brush are exposed, if the slip ring is used in an acidic or alkaline environment, there is a risk of corrosion when the acidic or alkaline liquid or gas contacts the collector ring or brush

[0012] 5) If a structure that does not introduce water or gas into the slip ring is adopted, high mechanical precision is required and the manufacturing cost increases

However, even if a high-grade rubber gasket is placed on the rotating bearing part, it cannot completely isolate the

Furthermore, there is also a problem of increased frictional force with respect to rotation

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