JP2012239325A - Power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generator which enables noise prevention measures to be easily taken in existing facilities, eliminates the need to provide a new external power source, and suppresses noise without consuming extra electric power.SOLUTION: A vibration energy resulting from the operations of a motor 1 and an electric generator 2 is converted into electric energy by vibration energy/electric energy conversion means 5, and the electric energy is supplied to noise elimination means 7 by power supply means 6 to eliminate noise including vibration sounds of the motor 1 and the electric generator 2 and engine operation sounds. This structure realizes a power generator which enables noise prevention measures to be easily taken in existing facilities, eliminates the need to provide a new external power source, and suppresses noise without consuming extra electric power.

Description

  The present invention relates to a power generation device, and particularly relates to noise countermeasures such as vibration noise of the power generation device and engine operation sound.

  A power generator such as an engine power generator is generally composed of a prime mover, a generator, and a control panel. In such a power generation apparatus, when the prime mover is operated, the generator is operated by the rotational energy. However, noise such as vibration noise and engine operation sound generated by this is very disturbing to the surrounding people. It was a thing.

  As a countermeasure against such noise, in Patent Document 1, noise is input as a device for removing noise sound of a predetermined frequency from an inverter mounted on an uninterruptible power supply, and an input waveform signal corresponding to this noise is generated. Presented is a noise removing device comprising: sound collecting means for performing, timing changing means for shifting the phase of an input waveform signal to output as an output waveform signal, and sound emitting means for outputting a sound according to the waveform change of the output waveform signal Has been.

Japanese Patent Laid-Open No. 2003-233381

  Conventional noise countermeasures for power generation devices include measures such as keeping the installation location of the power generation device away from people (for example, an office) or providing a soundproof structure for a package or room that houses the power generation device. However, these noise countermeasures are easy to perform when newly installing a power generation device, but when it is applied to existing equipment, the cost for securing a new installation location and the soundproof structure of the package or room There was a problem of costly construction work.

  According to the noise sound removing device presented in Patent Document 1, noise can be removed without using a soundproof structure on the wall or ceiling of the installation location of the uninterruptible power supply. However, it is necessary to prepare a power source for operating the noise noise elimination device, and power is always consumed for noise countermeasures.

  The present invention has been made to solve the above-described problems, and can be easily applied to existing facilities, does not require a new external power supply, and does not consume extra power. Another object of the present invention is to provide a power generator capable of suppressing noise.

  A power generation device according to the present invention is a power generation device including a prime mover, a generator, and a control panel, and includes a vibration energy / piezoelectric element that converts vibration energy generated by operation of the prime mover and the generator into electrical energy. Electric energy conversion means, noise removal means for canceling and removing noise including vibration noise of engine and generator and engine operation sound, and current input from vibration energy / electric energy conversion means A power supply means for converting to a voltage and frequency suitable for the removing means and outputting to the noise removing means is provided.

According to the present invention, the vibration energy generated by the operation of the prime mover and the generator is converted into electric energy, and supplied to the noise removal means via the power supply means to remove the noise of the prime mover and the generator. Therefore, it is possible to easily implement the existing equipment, and it is not necessary to provide a new external power source, and a power generation device capable of suppressing noise without consuming extra power is obtained.

It is a block diagram which shows the structure of the electric power generating apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows the electric power generating apparatus which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the vibration energy / electrical energy conversion means of the electric power generating apparatus which concerns on Embodiment 1 of this invention.

Embodiment 1 FIG.
Below, the electric power generating apparatus which concerns on Embodiment 1 of this invention is demonstrated based on drawing. FIG. 1 is a block diagram illustrating a configuration of the power generation device according to the first embodiment, and FIG. 2 is a side view illustrating the power generation device according to the first embodiment. In the figure, the same and corresponding parts are denoted by the same reference numerals. In addition, the kind of electric power generation apparatus which concerns on this invention is not specifically limited, The thing installed indoors, the outdoors, a motor vehicle, etc. is included widely.

  The power generation apparatus 100 is a power generator 1 that is operated by an energy source such as heavy oil, kerosene, light oil, and city gas, and power generation that is directly connected to the motor 1 and converts rotational energy (mechanical energy) of the motor 1 into electrical energy. Machine 2 is provided.

  The control panel 3 controls the operation and stop of the prime mover 1 and the generator 2 and the opening and closing of a circuit breaker (not shown), and keeps the rotation speed (frequency) and voltage constant with respect to load fluctuations. Control is performed. In addition, when an abnormality occurs, the control panel 3 has a function of displaying the abnormality and transmitting an abnormality signal to the management system.

  The storage container 4 is provided for the purpose of soundproofing and / or preventing rainwater intrusion, and is, for example, a steel plate package. In the case of the power generation device 100 having a structure not surrounded by a package, the room in which the power generation device is installed corresponds to the storage container 4.

  The vibration energy / electrical energy conversion means 5 is means for converting vibration energy generated with the operation of the prime mover 1 and the generator 2 into electric energy. In the first embodiment, each support of the prime mover 1 and the generator 2 is supported. It is installed in the part (leg part). However, the installation location of the vibration energy / electrical energy conversion means 5 is not limited to this, and the number of installation can be freely set. The configuration of the vibration energy / electrical energy conversion means 5 will be described later with reference to FIG.

  The power supply means 6 is a power supply circuit that converts the current input from the vibration energy / electric energy conversion means 5 into a voltage and frequency suitable for the noise removal means 7 and outputs them to the noise removal means 7. In the first embodiment, it is composed of a DC / DC converter 61 and a DC / AC inverter 62, which are housed in the control panel 3.

The noise removing means 7 emits a sound that cancels out noise including the vibration sound of the prime mover 1 and the generator 2 and the engine operation sound, and removes the noise. Is done. Here, the sound that cancels the noise is a sound that cancels at least one noise such as the noise generated with the vibration sound of the prime mover 1, the noise generated with the vibration sound of the generator 2, and the noise generated with the engine operation sound. Or a sound that cancels the plurality of noises. The noise canceller 71 detects the frequency and magnitude of the noise input waveform signal captured by the microphone 72 and synthesizes a sound corresponding to the output waveform signal obtained by delaying the phase of the input waveform signal by a half wavelength, and the mute speaker 73. To release from.

  In the first embodiment, the noise canceller 71 is housed in the control panel 3 as shown in FIG. The installation location of the microphone 72 and the mute speaker 73 is not particularly limited, but the mike 72 is a position where noise can be taken in efficiently, and the mute speaker 73 is more efficient due to the sound emitted from the mute speaker 73. It is desirable to be installed at a position where

  FIG. 3 shows the configuration of the vibration energy / electric energy conversion means 5 in the first embodiment. In the vibration energy / electrical energy conversion means 5 in the first embodiment, a piezoelectric element made of piezoelectric ceramics 54 sandwiched between two disk-shaped electrodes 53 is laminated and bonded between a pair of disk-shaped rubbers 52. And integrated. These laminates are attached to the prime mover 1 and the generator 2 with upper bolts 51 and attached to the installation surface with lower bolts 51.

  As the piezoelectric ceramic 54, for example, a raw material powder such as lead zirconate titanate (PZT) is molded, fired at a high temperature, and subjected to polarization treatment. Note that the number of stacked piezoelectric elements and other members constituting the vibration energy / electrical energy conversion means 5, the planar shape, the thickness, and the like can be freely selected and are not limited to those shown in FIG.

  Next, the operation will be described. During operation of the power generation apparatus 100, vibration energy generated with the operation of the prime mover 1 and the generator 2 is transmitted to the vibration energy / electric energy conversion means 5. The vibration energy acts on the piezoelectric element from the upper and lower bolts 51 of the vibration energy / electrical energy conversion means 5 as an external force such as a compressive force or a shearing force, and the piezoelectric element generates power. The direct current obtained here is input to the power supply means 6 from the pair of electrodes 53 of the piezoelectric element via the conductive cable.

  The direct current input from the vibration energy / electrical energy conversion means 5 to the power supply means 6 is converted into an alternating current having a voltage and frequency suitable for the noise canceller 71 of the noise removal means 7 by the DC / DC converter 61 and the DC / AC inverter 62. It is converted into current and output to the noise canceller 71.

  The noise canceller 71 supplied with power from the power supply means 6 takes in noise including vibration sound of the prime mover 1 and generator 2 and engine operation sound by the microphone 72 and detects the frequency and magnitude of the input waveform signal of the noise. At the same time, the sound corresponding to the output waveform signal obtained by delaying the phase of the input waveform signal by half wavelength is synthesized and emitted from the mute speaker 73. Thereby, the noise is canceled out and removed.

  As described above, according to the first embodiment, vibration energy generated with the operation of the prime mover 1 and the generator 2 is converted into electric energy by the vibration energy / electric energy conversion means 5, and this is supplied to the power supply means. 6 is supplied to the noise removing means 7 to remove the noise of the prime mover 1 and the generator 2, so that it can be easily applied to existing equipment, and it is not necessary to provide a new external power source, and extra A power generation device capable of suppressing noise without consuming a large amount of power is obtained.

Further, when the power generation apparatus 100 that requires noise countermeasures is operated, the operation of automatically supplying the electric power (current) obtained by the vibration energy / electric energy conversion means 5 to the noise removal means 7 via the power supply means 6 is automatically performed. Therefore, the operation / stop operation of the noise removing means 7 is not required, and the burden on the worker is not increased. Further, by storing at least a part of the noise removing unit 7 and / or at least a part of the power supply unit 6 in the control panel 3, it is possible to avoid an increase in size and complexity of the apparatus.

  The present invention can be used as a noise countermeasure for a power generator.

1 prime mover, 2 generator, 3 control panel, 4 storage container,
5 vibration energy / electric energy conversion means, 6 power supply means, 7 noise removal means, 51 bolts, 52 rubber, 53 electrodes, 54 piezoelectric ceramics,
61 DC / DC converter, 62 DC / AC inverter,
71 Noise canceller, 72 microphone, 73 mute speaker, 100 power generator.

Claims (4)

  A generator comprising a prime mover, a generator, and a control panel, comprising: a vibration energy / electric energy conversion means including a piezoelectric element that converts vibration energy generated by operation of the prime mover and the generator into electrical energy; Noise removing means for canceling and removing noise including noise generated by the motor and the generator and noise of engine operation; and current input from the vibration energy / electrical energy converting means. A power supply device comprising a power supply means for converting the voltage and frequency into a voltage and frequency suitable for the above and outputting to the noise removing means.   2. The power generation device according to claim 1, wherein the noise removing unit includes a noise canceller, a microphone, and a mute speaker, and the noise canceller detects a frequency and a magnitude of an input waveform signal of noise captured by the microphone. In addition, a power generation apparatus characterized in that a sound corresponding to the output waveform signal obtained by delaying the phase of the input waveform signal by half a wavelength is synthesized and emitted from the mute speaker.   2. The power generator according to claim 1, wherein at least a part of the noise removing means is housed in the control panel.   2. The power generator according to claim 1, wherein at least a part of the power supply means is housed in the control panel.

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