Vehicle horn driving circuit

Abstract

A horn electrical energization circuit 5 including an AC type horn H is connected to a multi-pole type AC power generator G while being independent from a circuit to be controlled with an AC regulator 2.

Description

technical field [0001] The present invention relates to an improvement in a vehicle horn drive circuit for driving an AC horn by power generated by an engine driven multi-pole alternator. Background technique [0002] Patent Document 1 discloses a vehicle horn drive circuit in which an AC horn is connected to one end of a power generation coil included in a multi-pole alternator via a half-wave rectification unit. [0003] Patent Document 1 Publication No. 63-42025 [0004] In the prior art described above, in order to prevent the natural frequency of the vibrating plate of the AC horn from mismatching with the frequency of the AC current output from the multi-pole alternator, the horn cannot emit sound especially in the high-speed rotation region of the motor. , and the AC current is provided to the excitation coil of the horn after half-wave rectification. [0005] On the other hand, in order to convert the AC voltage obtained by the multi-pole alternator into a stable A...

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Problems solved by technology

[0006] However, although the AC horn emits sound by repeating the operation of attracting the film to the exciting coil side and separating the film from the exciting coil by an AC current, as described above, since the AC horn is connected in parallel to the AC regulator, If the rotation speed of the motor is in the high-speed rotation range, the current that exerts the electromagnetic force that attracts the film in the excitation coil of the AC speaker becomes a pulsating current due to the action of the AC regulator and continues to flow, so there is a possibility of poor sound generation.

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