Small-sized hydroelectric power generating apparatus

Abstract

A small-sized hydroelectric power generating apparatus includes a body case having a fluid passage, a water wheel provided at the above fluid passage and rotating with passing of the fluid having the predetermined flowing amount, a rotator coupled to this water wheel, and rotating with the water wheel, the rotator serving as a rotor portion arranged opposed to a stator portion, the rotor portion being relatively rotated in relation to the stator portion by passing the fluid to generate electric power, the stator portion having comb-shaped pole teeth which are arranged in the circumferential direction at regular intervals so as to be opposed to the peripheral surface of a rotor magnet of the above rotor portion, and a circumferential gap between the adjacent pole teeth is set to 1.5 times or less the size of a radial gap between each pole tooth and the rotor magnet.

Description

BACKGROUND OF INVENTION[0001] 1. Field of Invention[0002] The present invention relates to a small-sized hydroelectric power generating apparatus using water power generated by flow of water passing through a faucet.[0003] 2. Related Art[0004] Conventional, an automatic water faucet apparatus is known well, in which by detecting by a sensor that a user holds out his hand beneath a faucet, water flows from the faucet. Further, recently, an apparatus is also proposed, in which a small-sized power generating apparatus is provided at a fluid passage of such the automatic water faucet apparatus, and the consumption power of a circuit of the afore-mentioned sensor is supplied by storing the electric power obtained by this small-sized power generating apparatus (refer to Unexamined Japanese Utility Model Publication Hei. 2-65775).[0005] The constitution of the afore-mentioned small-sized hydroelectric power generating apparatus will be briefly described below. A water wheel is provided at ...

AI Technical Summary

Benefits of technology

[0010] In view of the above problem, a first object of the invention is to provide a small-sized hydroelectric power generating apparatus constructed so that in order to effectively generate electric power with a small amount of flowing water, detent torque between the a rotor magnet and a pole tooth is kept low, and the loss of magnetic fluxes effective to power generation is small.

[0011] In view of the above problem, a second object of the invention is to provide a small-sized hydroelectric power generating apparatus which has such structure that an ejection hole for efficiently ejecting water to the water wheel can be formed without using many split molds and a complicated machining method such as turn-separation, and which can improve rotational efficiency of the water wheel and also power generating efficiency.

Problems solved by technology

Therefore, such a problem is produced that the water wheel does not rotate smoothly, or the water wheel does not rotate at all if the amount of the flowing water is a little.

Accordingly, if the gap between them is made wider than it needs, the electric power cannot be generated effectively.

From this reason, in this type of small-sized hydroelectric power generating apparatus, such a proposition that power generation is performed efficiently with a smaller amount of flowing water cannot be solved.

However, in case that the number of the ejection holes is three or more, and the ejection hole is not opposed to the central axis but orthogonally opposed to the vane, machining is very complicated and expensive.

Therefore, the rotational efficiency of the water wheel was low and the power generating efficiency was also low.

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