KR20230131801A - Multichannel amplifier to be capable of output power control having multiple step up transformers in Public Address system - Google Patents

Abstract

A multi-channel amplifier equipped with a variable output multi-stage transformer in a public address (PA) system is disclosed. A multi-channel amplifier equipped with a variable output multi-stage transformer in a public address (PA) system includes a plurality of multi-channel amplifiers equipped with at least one low output amplifier of 30 W or less; And an amplifier such that the plurality of multi-channel amplifiers output kx AMP (k times AMP output) for each N individual system (N = 1, 2, 3,..) in that order. Each N individual system is provided, including each matching transformer connected to the number k, and each of the N individual systems is sequentially connected to a single-stage structure, a two-stage structure, and a parallel structure connected to a multi-stage structure. Each k amplifier is connected in parallel to the primary coil of each matching transformer k, and includes k matching transformers of a parallel structure that perform impedance matching with a plurality of speakers connected to the secondary coil, and the plurality of multi-channel The amplifier uses k amplifiers to produce the output of kx AMP (k times AMP output), each transformer of the k matching transformers in the parallel structure uses a step-up transformer, and each step-up transformer has the same size. It has impedance output characteristics equal to the output power value.
1 of each transformer k connected sequentially in a single-stage structure, a two-stage structure, and a multi-stage structure for the number k of amplifiers to produce k times the AMP output at the front end of the primary coil of each transformer of k transformers. connected in parallel (at the front end) to the secondary coil; Alternatively, multiple low-output amplifiers (30W) can be used to configure a multi-channel amplifier consisting of a switching output matrix capable of accumulating output (at the rear end) at the secondary coil of each transformer of k transformers. It consists of two transformers to provide an output voltage of 100V or 70V and provides a variable output multi-channel high output PA amplifier (1AMP 30W, 2AMP 60W, 4AMP 120W, 8AMP 240W, 16AMP 480W, or 32AMP 960W).

Description

{Multichannel amplifier to be capable of output power control having multiple step up transformers in Public Address system}

The present invention relates to a multi-channel amplifier with variable output in a public address (PA) system. More specifically, the present invention relates to a variable output multi-stage transformer in a public address (PA) system such as school broadcasting, buildings, and public institutions. This is about a multi-channel amplifier.

The audio equipment system includes a wired microphone that records sound sources, a wireless microphone, an antenna splitter connected to each wireless microphone and antennas (ANT), and at least one that converts the analog signal input for each wireless microphone channel into a digital signal. One or more wireless receivers, an audio mixer connected to the wireless receiver and a wired microphone and mixing analog signals for each channel, a digital signal processor connected to the audio mixer, and a digital signal processor It consists of an equalizer (EQ) that adjusts the frequency level of the analog signal for each channel connected to the DSP, a power amplifier that amplifies the analog signal, and at least one speaker that outputs the amplified analog signal.

1 is a configuration diagram of an audio equipment system.

A speaker is an audio device that converts electrical signals into vibrations of a diaphragm, generates small waves in the air, copies sound waves, and outputs sound signals. It is called a loudspeaker.

Speakers are of dynamic type, electromagnetic type, electrostatic type, dielectric type, and magnetostrictive type, depending on the principle and method of converting electrical signals into sound waves. The dynamic type with good performance is widely used for music playback or voice communication.

Speakers are classified according to their structure into cone type speakers, dome type speakers, and horn type speakers with a horn installed in front of the diaphragm.

Radiant speakers, in which the diaphragm is placed directly in the air, are mostly cone speakers used in stereo radio devices.

Cone speakers often use a cone-shaped diaphragm, and the coin-shaped speaker is more often used than the electromagnetic type, magnetic speaker (magnetic loudspeaker). Since efficiency is proportional to the square of the total number of magnetic fluxes passing through the coil, large-diameter speakers using large magnets have better electroacoustic conversion efficiency.

Usually, an amplifier has high-pitched speakers, mid-range speakers, and low-pitched speakers connected through a speaker network. Speakers are manufactured by combining bass speaker (20~100Hz), midrange speaker (squawker or tweeter + Bass, 100~1,000Hz), and high pitch speaker (tweeter, 1,000Hz~10kHz) units depending on the audio frequency band. The speaker system is equipped with an audio signal processing system, a power amplifier (Amp), and speakers (L, R).

A full range speaker that reproduces low to high sounds in the audible frequency band (20~20,000 Hz), a woofer that reproduces low sounds in the 20~100 Hz range, and a midrange speaker in the hundreds to thousands of Hz range. There is a squawker that reproduces high-pitched sounds in the range of thousands of Hz to 20 kHz.

Speakers play audio in the 100 to 8,000 Hz band and music in the 30 to 15,000 Hz band, considering the output and directivity characteristics of the space according to the output sound pressure level (SPL), frequency characteristics, and beam angle. Play on the band.

μbar에 대한 사람이 들을 수 있는 가장 작은 소리를 '기준 음압'이라고 한다.Sound pressure refers to the change in air pressure from atmospheric pressure (1 atm = 1,013 mbar). Based on normal human hearing, the minimum audible value of a 1 kHz plane wave sound Po =

The smallest sound that a person can hear in μbar is called 'reference sound pressure'.

[dB]Sound pressure level (SPL) is

[dB]

μbar), P는 측정된 음압이며, 음압 레벨은 데시벨(dB)의 단위로 표시된다.However, Po is the reference sound pressure (

μbar), P is the measured sound pressure, and the sound pressure level is expressed in units of decibels (dB).

For reference, unlike general home audio devices, PA (Public Address) amplifiers are amplifiers used for announcements in schools, churches, playgrounds, government offices, or public buildings, and their output method is different from general home audio devices.

In home audio or car audio devices, the impedance of the speaker is constant, for example, 4Ω or 8Ω, and the output voltage of the amplifier changes depending on the output level. For example, when an 8Ω speaker is connected to an amplifier with 100W output, the maximum output voltage is 28.3V. In addition, the PA amplifier transmits signals by boosting the output voltage to 70V or 100V at the output of the amplifier to reduce power loss in the line.

The PA amplifier is constant at 70V or 100V regardless of output capacity, and power consumption is determined by the impedance of the speaker connected to the output terminal.

As prior art 1 related to this, “Class D power amplifier with built-in output transformer for public address system” is registered in Patent Registration No. 10-1248181 (registration date March 21, 2013).

Figure 2 is a circuit diagram showing the configuration of a conventional D-class power amplifier with a built-in output transformer for a public address system.

D class power amplifier with built-in output transformer for public address system,

First and second sound source input units (CHANNEL1,2 INPUT) provided to input generated sound sources;

Mode selection switch (S1) to select two-channel mode and bridged mono mode;

First and second preamplifier units (31, 32) that amplify the voltage of the input sound source;

First and second power amplifier units (41, 42) of class D that amplify the power of each sound source output from the first and second preamplifier units (31, 32);

First and second output transformers (T1 and T2) that transmit the outputs of the first and second power amplifier units (41 and 42) at a constant voltage;

a relay (K1) that turns on/off the first and second output transformers (T1, T2) according to the operation of the mode selection switch (S1);

It includes first and second speakers (51, 52) connected to the first and second output transformers (T1 and T2),

Different generated sound sources are input to the first sound source input unit (CHANNEL1 INPUT) and the second sound source input unit (CHANNEL2 INPUT),

The input sound source is input to the first and second preamplifier units 31 and 32, respectively, and the sound source voltage is amplified,

Each sound source output from the first and second preamplifier units (31 and 32) is power amplified through the first and second power amplifier units (41 and 42) of the D class, and is supplied to the first and second output transformers, respectively. Converted to constant voltage output through (T1,T2),

Additionally, by operating the mode selection switch S1, the relay K1 is turned off and the constant voltage output is output to the first and second speakers 51 and 52 independently connected to each other.

Figure 3 shows that when there is a 'low impedance' amplifier of 100 [W] 4 (Ω), the speaker impedance is 4 (Ω), and the resistance of the transmission line is 4 (Ω), the amplifier has a rated output of 100 [W]. This is a circuit that shows the output.

PA uses Constant Voltage Power Transmission.

[Example 1] When there is a 'low impedance' amplifier of 100[W] 4(Ω), the speaker impedance is 4(Ω), and the resistance of the transmission line is 4(Ω), the amplifier has a rated output of 100[W]. When outputting ], what power is actually output from the speaker?

First, find the output voltage of the amplifier itself:

100[W] 4[Ω] Amplifier voltage E [V] =

When the rated output is 100W, the output impedance is 4Ω, and the voltage is 20V, if you connect a speaker with an impedance of 4Ω, the current flowing becomes 5A, but in the picture, the current flows only 2.5A, which is half of 5A. This is because the speaker's impedance 4Ω and the line resistance 4Ω are in series, so the combined resistance Zr becomes 8Ω. This means that the impedance of the load (speaker + line) is twice as large as the impedance of the source (amplifier), so the current and power This means that transmission will decrease. Therefore, only 25W is delivered to the speaker as partial pressure and power.

The output terminals of the PA amplifier are 4Ω, 8Ω, 16Ω, 70V, and 100V. 4Ω, 8Ω, and 16Ω are called low impedance, and 70V and 100V are called high impedance.

However, in public address (PA) systems such as school broadcasting and government offices, an output voltage of 100V or 70V is provided, and multiple low-output amplifiers (30W) are used at the front or rear end of the transformer to output variable k in a parallel structure. It did not provide a variable multi-channel high output PA amplifier (1AMP 30W, 2AMP 60W, 4AMP 120W, 8AMP 240W, 16AMP 480W, 32AMP 960W) that consists of two transformers to provide an output voltage of 100V or 70V.

Patent registration number 10-1248181 (registration date: March 21, 2013), “D-class power amplifier with built-in output transformer for public address system”, InkelPA Co., Ltd.

The purpose of the present invention to solve the above problems is to provide the primary coil of a step-up transformer (STEP UP TRANS) with a parallel structure and multiple amplifiers in public address (PA) systems such as school broadcasting, buildings, and public institutions. At the front end or the rear end of the secondary coil, the circuit is configured in a way that matches the output of k amplifiers to output k Provides a multi-channel amplifier equipped with a variable output multi-stage transformer, which provides one high-output PA amplifier that provides an output voltage of 100V or 70V by configuring k transformers with variable output.

In order to achieve the purpose of the present invention, the multi-channel amplifier equipped with an output variable multi-stage transformer in the public address system according to Embodiment 1 includes at least one low-output amplifier of 30 W or less in the public address (PA) system. Equipped with multiple multi-channel amplifiers; and an amplifier such that the plurality of multi-channel amplifiers produce an output of k Each N individual system is provided, including each matching transformer connected to the number k, and each of the N individual systems is sequentially connected to a single-stage structure, a two-stage structure, and a parallel structure connected to a multi-stage structure. Each k amplifier is connected in parallel to the primary coil of each matching transformer k, and includes k matching transformers in a parallel structure that perform impedance matching with a plurality of speakers connected to the secondary coil,

The multi-channel plurality of amplifiers uses k amplifiers to produce an output of k Transformers have identical output power values and identical impedance output characteristics.

In addition, in the public address system according to Example 2, the multi-channel amplifier equipped with an output-variable multi-stage transformer includes, in a public address (PA) system, a plurality of multi-channel amplifiers equipped with at least one low-output amplifier of 30 W or less; And for N individual systems (N=1,2,3,..), one amplifier per channel is connected in parallel to the primary coil of each transformer k, and a plurality of speakers k and impedance connected to the secondary coil. It includes k matching transformers in a parallel structure that perform matching,

k = 1, 2, 3,... output of k To achieve this, it is connected to a single-stage structure, a two-stage structure, and a multi-stage structure,

The multi-channel plurality of amplifiers uses k amplifiers, each transformer of the k matching transformers in the parallel structure uses a step-up transformer, and each step-up transformer has the same output power value and the same impedance output characteristic. has

The present invention relates to the front end of the primary coil or the rear of the secondary coil of a step up transformer (STEP UP TRANS) structured in parallel with multiple amplifiers in public address (PA) systems such as school broadcasting, buildings, and public institutions. At the end, we manufactured a multi-channel amplifier equipped with a variable output multi-stage transformer, which configures the circuit in a way that matches the output of k amplifiers and produces k x AMP output (k times AMP output).

1 of each transformer k sequentially connected in a single-stage structure, a two-stage structure, and a multi-stage structure for the number k of amplifiers to produce k times the AMP output at the front end of the primary coil of each of the k transformers. Multiple low-output amplifiers (30W) are used in parallel to construct a multi-channel amplifier that is connected in parallel to the primary coil or consists of a switching output matrix capable of accumulating output at the rear end of the secondary coil of each transformer of k transformers. By configuring k transformers with variable output structure, it is possible to produce a single high-output output variable multi-channel PA amplifier (1AMP 30W, 2AMP 60W, 4AMP 120W, 8AMP 240W, 16AMP 480W, 32AMP 960W) that provides an output voltage of 100V or 70V. I did it.

Figure 1 is a configuration diagram of an audio device system.
Figure 2 is a circuit diagram showing the configuration of a conventional D-class power amplifier with a built-in output transformer for a public address system.
Figure 3 shows that when there is a 'low impedance' amplifier of 100 [W] 4 (Ω), the speaker impedance is 4 (Ω), and the resistance of the transmission line is 4 (Ω), the amplifier has a rated output of 100 [W]. This is a circuit that shows the output.
Figure 4 shows a variable output multi-stage in a public address (PA) system in order to manufacture a multi-channel amplifier with variable output capable of self-diagnosis using a plurality of amplifiers and a plurality of transformers (STEP UP TRANS) according to the present invention. This is a diagram of a multi-channel amplifier equipped with a transformer.
Figure 5 shows a method in which kx AMP is output (k times AMP output) by matching the output of k amplifiers at the front end of the primary coil of a parallel structure transformer (STEP UP TRANS) according to the first embodiment, This is a circuit diagram that varies the output in a parallel structure of a multi-channel amplifier with an output matrix configuration that allows accumulation of output in a parallel structure from multiple amplifiers.
Figure 6 shows the output of N This is a circuit diagram that varies the output through the parallel structure of a multi-channel amplifier and the parallel structure of a step up transformer (STEP UP TRANS).
Figure 7 is a screen showing the technical features of the output variable multi-channel amplifier under development.
Figure 8 is a screen showing an industrial amplifier (100V or 70V voltage) that receives multiple sound sources, amplifies them, and outputs them to multiple speakers.
Figure 9a shows an output matrix (input 8CH sound source matrix, output 16CH amplifier output matrix) of the high-output AMP with Amp and output TRANS combined with eight 30W amplifiers, depending on the embodiment, to achieve an output voltage of 100V or 70V suitable for the PA System. This is the digital amplifier production screen.
Figure 9b is a diagram to explain the principle of a transformer including an iron core, a primary coil, and a secondary coil.
Figure 9c shows a constant voltage transmission for school public address broadcasting (PA public address broadcasting) to produce a high-output amplifier by connecting a plurality of amplifiers and a multi-transformer (step up trans) in parallel structure to the primary coil in multiple stages in a public address (PA) system. It represents the method system.
Figures 10 and 11 are conceptual diagrams of an industrial digital multi-channel amplifier that converts the output voltage to 100V or 70V.
Figure 12 is a diagram explaining amplifier technology that provides an output voltage of 100V or 70V using multiple amplifiers and multiple matching step up transformers in a school broadcasting system for public address (PA).
Figure 13 is a diagram showing amplifier technology that provides an output voltage of 100V or 70V using multiple amplifiers and multiple matching step up transformers in a school broadcasting system for public address (PA).
Figure 14 shows amplifiers and speakers (high-pitched speakers, mid-pitched speakers, low-pitched speakers, and ultra-low-pitched speakers) of audio equipment or systems for events in specific spaces such as broadcasting studios and performance halls.

Hereinafter, the configuration and operation of the preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, if it is determined that a detailed description of a related known technology or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the attached drawing numbers are assigned the same drawing numbers in other drawings when indicating the same configuration.

Multi-channel amplifier with variable output capable of self-diagnosis using multiple amplifiers and multiple step up transformers

PUBLIC ADDRESS (PA) refers to a sound device or system for making public broadcasts such as announcements, music, and emergency broadcasts to part of or the entire building such as a large building, school, or government office. Install a large number of low-power (high-impedance, 100V) speakers, connect them in parallel, and connect them to the HIGH voltage constant voltage (100v) output terminal of the amplifier.

As the length of the speaker line becomes longer (several tens of meters to tens of kilometers), a high impedance transmission method is applied to take into account the effect of voltage drop in the line, and the system is operated with an emphasis on clarity rather than intense power.

In this technology, the output voltage of the amplifier applied to public address (PA) is set to 100V, and a high-output amplifier technology of 60W or more was invented using a low-output amplifier of 30W or less.

Low-output amplifiers use 30W or less, and high-output amplifiers use 60W or more.

In general, a high-output amplifier of 60W or more is used to create a high-output amplifier by setting the output impedance to output 100v. The present invention relates to a technology that can implement a high-output public address (PA) amplifier with a smaller capacity amplifier.

* Multi-channel amplifier capable of accumulating output in parallel structure of multi-channel amplifier through multi-channel amplifier configuration

* Multi-channel amplifier with output matrix configuration capable of accumulating output in parallel structure

Claim 1 consists of k multiple low-output amplifiers (30W) with k multiple step-up transformers (STEP UP TRANS) in a parallel structure, and using this structure, an amplifier capable of self-diagnosis and the output of the amplifier in a parallel structure. It is a technology that can configure variable output by accumulating it, and implements an amplifier by transmitting the variable output for each N individual system (for each CH) to multiple channels.

PA AMP is used by configuring an AMP whose secondary side outputs a HIGH voltage constant voltage (100V). To design a high output amplifier. A multi-channel amplifier that defines the same output at an impedance of 2~8Ω. The output impedance of the amplifiers all have the same value, and the primary coil of the amplifier's step up transformer (STEP UP TRANS) is connected to the impedance of multiple amplifiers. It is connected to the output of the amplifier and the primary coil of the step up transformer (STEP UP TRANS). It has multiple amplifiers and multiple step up transformers (STEP UP TRANS). The secondary coil has the characteristic of N ratio (primary side N1:N2 ratio) to make 100V, and the output impedance of constant voltage 100V is changed by applying an amplifier and a step up transformer (STEP UP TRANS) in a parallel matrix configuration. It is possible to design an amplifier with variable output characteristics.

When a specific amplifier malfunctions among multiple amplifiers, the malfunctioning amplifier is separated from the output, the output of the normal amplifier that is not in use is known, and the output of the normal amplifier is replaced with a normal amplifier in place of the corresponding malfunctioning amplifier to improve the amplifier output. Convert it so that it comes out without any problems.

The structure of the output constitutes a matrix (8 inputs, 16 outputs in the example), and distinguishes between used amplifiers and unused amplifiers.

Figure 4 shows a variable output multi-stage in a public address (PA) system in order to manufacture a multi-channel amplifier with variable output capable of self-diagnosis using a plurality of amplifiers and a plurality of transformers (STEP UP TRANS) according to the present invention. This is a diagram of a multi-channel amplifier equipped with a transformer.

The present invention relates to the front end or secondary side of the primary coil of a matching transformer (STEP UP TRANS) in parallel with k amplifiers for each N individual system in a public address (PA) system such as school broadcasting, buildings, public institutions, etc. At the rear end of the coil, a multi-channel amplifier was manufactured with a variable output multi-stage transformer that configures the circuit in a way that matches the output of k amplifiers and produces k x AMP output (k times AMP output).

K number of amplifiers are sequentially connected in parallel in a single-stage structure, a two-stage structure, and a multi-stage structure for each N individual system to produce k times the AMP output at the front end of the primary coil of each transformer. connected in parallel to the primary coil of each transformer k; Alternatively, a plurality of low-output amplifiers (30W) can be used to construct a multi-channel amplifier consisting of a switching output matrix capable of accumulating output at the rear end of the secondary coil of each transformer, using k transformers with variable output in a parallel structure. By configuring it, it was possible to produce a variable output multi-channel high output PA amplifier (1AMP 30W, 2AMP 60W, 4AMP 120W, 8AMP 240W, 16AMP 480W, 32AMP 960W) that provides an output voltage of 100V or 70V.

Each of the k transformers is sequentially connected to the number k of amplifiers to produce k times the AMP output at the front end of the primary coil of each transformer, each connected in a single-stage structure, a two-stage structure, and a multi-stage structure for each N individual system. connected in parallel to the primary coil of transformer k (Example 1, Figure 5); Or, to construct a multi-channel amplifier consisting of a switching output matrix capable of accumulating output at the rear end of the secondary coil of each transformer of k transformers (example, FIG. 6), multiple low-output amplifiers (30W) are used in parallel. It provides a variable output multi-channel high output PA amplifier that provides an output voltage of 100V or 70V by configuring k transformers with variable output structure.

The PA SYSTEM (public address) is equipped with a separate PA speaker for transmission to the speaker, and the input of this speaker receives an input of 100V. When 100V voltage is connected in parallel, the amount of current adds up and the output increases. V x I - principle that output increases as W (current I) increases)

The PA amplifier transmits an output of 100V to the PA speaker. This principle allows the output to be varied by providing OPT (OUTPUT TRANS) that can form a constant voltage (100V). The output can be increased by equipping N amplifiers with the same rated output and connecting the output of the amplifier to OPT (OUTPUT TRANS), which can receive from one to k inputs. Its output is equal to the sum of the number of connected amplifiers. By controlling the output of OPT (OUTPUT TRANS) and adding the outputs of the OPT (OUTPUT TRANS), an output equal to the sum of the outputs of each OPT (OUTPUT TRANS) can be produced.

The output can be varied by controlling the sum of the number of B (the number of amplifiers connected to the input of OPT) that inputs the output of the AMP to OPT (OUTPUT TRANS) and the output of OPT (OUTPUT TRANS) connected in this way.

ㆍMultiple amplifiers are composed of multiple step-up transformers (STEP UP TRANS) (=OPT), and this is used to configure variable output by accumulating the output of the amplifier with a parallel structure, enabling self-diagnosis. This is a technology that implements an amplifier by transmitting to multiple channels (CH1, CH2, CH3,..) in a parallel structure. PA AMP is used by configuring an AMP that outputs a HIGH voltage constant voltage (100V) on the secondary side. To design a high-output amplifier, a multi-channel amplifier that defines the same output at an impedance of 2 to 8Ω, the output impedance of the amplifier all have the same value, and multiple transformer (STEP UP TRANS) (=OPT) inputs to the amplifier are required. It is the same as the output impedance of the amplifier, and is connected to the output of the amplifier at the front end and the primary coil of the STEP UP TRANS (=OPT). It has multiple amplifiers and multiple STEP UP TRANS (=OPT), and STEP UP The secondary coil of TRANS has the characteristics of N ratio (N1:N2, ratio of the number of turns of the primary; secondary coil) to make 100V, and applies the amplifier and STEP UP TRANS (=OPT) to create a parallel structure matrix. With this configuration, the output impedance of the constant voltage of 100V is changed, so it is possible to design an amplifier with variable output characteristics.

ㆍIf a malfunction occurs among multiple amplifiers, the malfunctioning amplifier is separated from the output, the output of the normal amplifier that is not in use is known, and the output of this amplifier is replaced with the corresponding malfunctioning amplifier to ensure that the output is output without a problem. . The structure of the corresponding output constitutes a matrix and distinguishes between the amplifier that is used and the amplifier that is not used.

ㆍThe amplifier's input signal can receive digital and analog signals and amplifies the input signal. At this time, in order to send the input signal to the desired final output, the input signal is structured in a matrix structure, and the output signal of the amplifier can also be controlled in a matrix structure.

Figure 5 shows a method in which k x AMP is output (k times AMP output) by matching the output of k amplifiers at the front end of the primary coil of a parallel structure transformer (STEP UP TRANS) according to the first embodiment, This is a circuit diagram that varies the output in a parallel structure of a multi-channel amplifier with an output matrix configuration that allows accumulation of output in a parallel structure from multiple amplifiers.

(Example 1, Figure 5)

A multi-channel amplifier equipped with a variable output multi-stage transformer in a public address system includes a plurality of multi-channel amplifiers equipped with at least one low output amplifier (30W) of 30W or less in a public address (PA) system; And the plurality of multi-channel amplifiers include matching transformers connected to the number k of amplifiers so that k = 1, 2, 3,... output of k x AMP (k times AMP output) for each N individual system in that order. N (N = 1, 2, 3,..) individual systems are provided, and each of the N (N = 1, 2, 3,..) individual systems sequentially has a 1-stage structure, a 2-stage structure, .. K amplifiers in a parallel structure connected in a multi-stage structure are connected in parallel to the primary coil of each matching transformer k, and k amplifiers in a parallel structure perform impedance matching with a plurality of speakers connected to the secondary coil. Contains a transformer,

The multi-channel plurality of amplifiers uses k amplifiers to produce an output of k Transformers have identical output power values and identical impedance output characteristics.

The plurality of multi-channel amplifiers are PA amplifiers. The PA amplifier is constant at 70V or 100V regardless of output capacity, and power consumption is determined according to the impedance of the speaker connected to the output terminal.

The multi-channel multiple amplifiers use k amplifiers in a parallel structure to produce an output of k Use a step-up transformer.

The k matching transformers use a step up transformer with the characteristics of N ratio (N1:N2, number of turns of primary side:secondary side coil).

Each transformer of the k matching transformers uses a step-up transformer,

Each step-up transformer has the same output power value and impedance output characteristics.

Figure 6 shows the output of N x AMP (k times This is a circuit diagram that varies the output through the parallel structure of a multi-channel amplifier and the parallel structure of a step up transformer (STEP UP TRANS).

(Example 2, Figure 6)

In a public address system, a multi-channel amplifier equipped with a variable output multi-stage transformer is used.

In a public address (PA) system,

Multiple multi-channel amplifiers equipped with at least one low-output amplifier (30W) of 30W or less;

For each N individual system (N=1,2,3,..), one amplifier per channel is connected in parallel to the primary coil of each transformer k, and impedance matching with multiple speakers k connected to the secondary coil. k matching transformers in parallel structure that perform; and

k matching transformers in a parallel structure that perform impedance matching with a plurality of speakers; and

It includes a plurality of speakers k each connected to the k matching transformers,

k = 1, 2, 3,... output of k To achieve this, it is connected to a single-stage structure, a two-stage structure, and a multi-stage structure,

The multi-channel plurality of amplifiers uses k amplifiers, each transformer of the k matching transformers in the parallel structure uses a step-up transformer, and each step-up transformer has the same output power value and the same impedance output characteristic. has

The plurality of multi-channel amplifiers are PA amplifiers. The PA amplifier is constant at 70V or 100V regardless of output capacity, and power consumption is determined according to the impedance of the speaker connected to the output terminal.

The multi-channel plurality of amplifiers uses k amplifiers, and each transformer of the k matching transformers in the parallel structure uses a step-up transformer.

The k matching transformers use a step up transformer with the characteristics of N ratio (N1:N2, number of turns of primary side:secondary side coil).

The k matching transformers use step-up transformers,

Each step-up transformer has the same size output power value and the same impedance output characteristics.

Figure 7 shows the technical characteristics of the output variable multi-channel amplifier (input 8CH sound source input matrix, output 16CH amplifier output matrix) under development.

- Input 8CH sound source input matrix configuration

- Output 16CH amplifier output matrix configuration

8 BY 16 FULL MATRIX composition

- Multi-channel amplifier capable of output accumulation in parallel structure

- Amplifier output can be varied from a minimum of 30W to 240W for each CH.

- 3-wire amplifier output with emergency output and general output

- Automatically switches to a normal amplifier when an individual amplifier in use among multiple amplifiers malfunctions.

- Function to separate the amplifier and speaker lines when a problem occurs in the speaker line

- Detection of used and unused amplifiers

[characteristic]

- Built-in All in One function

(Power Amp/Speaker Selector/Matrix switch/EM Exchanger/Line Checker)

- Speaker Line Checker function

(Detects open and short states, blocks abnormal lines and displays LED)

- 30W (MAX-3016), 60W (MAX-6016) output per channel (supports 2-wire and 3-wire types)

- PRE-AMP Balance 8 channel input

- 16 channels of AMP output

- 8:16 FULL MATRIX function

- Remote and individual manual control function using LAN

- 3.5〃 LCD touch screen application (GUI SW operation)

- Automatically switches to DC when AC power is cut off.

- ADDRESS designation operation when using multiple devices

Figure 8 is a screen showing an industrial amplifier (100V or 70V voltage) that receives multiple sound sources, amplifies them, and outputs them to multiple speakers.

The output voltage of an industrial amplifier can be set to 100V or 70V, and the rated power is defined as the amount of current applied to this voltage.

÷ R) 와 같거나 높은 임피던스로 스피커를 연결해야 한다.An amplifier is a device that can receive input from multiple sound sources (source1, source2, source3,...), amplify it, and output it to multiple speakers. The voltage of the amplifier is set to 100V or 70V as the output voltage, and for a 600W amplifier when set to 100V, the output impedance is 10000/600(

The speaker must be connected with an impedance equal to or higher than ÷ R).

Figure 9a shows an output matrix (input 8CH sound source matrix, output 16CH amplifier output matrix) of the high-output AMP with Amp and output TRANS combined with eight 30W amplifiers, depending on the embodiment, to achieve an output voltage of 100V or 70V suitable for the PA System. This is the digital amplifier production screen.

For example, if you use 8 amplifiers with a minimum 30W amplifier output per CH, you can configure a multi-channel amplifier capable of accumulating output in a parallel structure, allowing the output of the amplifier to vary up to 8 x 30W = 240W.

Figure 9b is a diagram for explaining the principle of a transformer including an iron core, a primary coil, and a secondary coil.

A transformer has the number of turns N1 of the primary coil, magnetic flux change Φ1, voltage V1, and current I1, and a magnetic field is generated by mutual induction depending on the number of turns the coil is wound around the iron core or ferrite. The magnetic flux changes and the number of turns N2 of the secondary coil, magnetic flux change Φ2, voltage V2, and current I2 are induced.

,

,

The N1/N2 ratio of the transformer is the number of turns of the amplifier connected to the primary coil (N1)/the number of turns of the secondary coil (N2) = V1/V2 = I2/I1.

M is the mutual inductance and, applied to the example circuit, is calculated as:

Figure 9c shows the school public address broadcasting (PA) constant voltage for producing a high-output amplifier by connecting a plurality of amplifiers and a multi-transformer (step up transformer) in parallel structure to the primary coil in multiple stages in a public address (PA) system. Indicates the transmission method system.

A public address (PA) system is a sound device or system for public broadcasting such as announcements, music, and emergency broadcasts to part of the building or the entire building in large buildings, school broadcasting, public offices, etc.

Install a considerable number of low-output (high-impedance) speakers, connect them in parallel, and connect them to the HIGH voltage constant voltage output terminal of the amplifier. Since the speaker line is tens of meters to several kM long, a high impedance transmission method is applied to take into account the effect of the line's voltage drop, and the focus is on clarity rather than intense power.

High Impedance: Several hundred Ω ~ 10㏀

Impedance refers to the AC resistance Z (Ω) that a load (speaker, etc.) has to AC power (amplifier output). To create a high-output amplifier of 60W or more, it is composed of multiple amplifiers of equal performance and multiple transformers (step up transformers) in parallel structure.

- To produce a single high-output amplifier, a high-output amplifier is produced by composing multiple low-output amplifiers and a multi-transformer (step up trans) in parallel structure.

- A high-output amplifier of 60W or more is created by connecting multiple amplifiers of the above amplifier technology and a multi-transformer (step up trans) with a parallel structure to the primary coil in a multi-stage structure.

Figures 10 and 11 are conceptual diagrams of an industrial digital multi-channel amplifier that converts the output voltage to 100V or 70V.

Industrial digital AMP equipment has an output voltage of 100V, and the output of the AMP is defined by the amount of current. The industrial speaker, defined as a PA SPEAKER, matches the 100V voltage to the impedance of the speaker with an internal matching transformer. This technology is an amplifier technology consisting of k multiple amplifiers and multiple matching transformers for each N individual system, and provides high output to speakers while maintaining the performance of a digital amplifier. Based on the design of multiple low-output amplifiers of 30W or less, matching transformers, and speakers, an amplifier technology that provides high output of 60W or more with high-output speakers was presented.

For example, if you use one amplifier with at least 30W amplifier output per CH (N individual system), you can configure a multi-channel amplifier capable of accumulating output in a parallel structure, allowing the amplifier's output to vary up to 1 x 30W = 30W. possible.

In addition, by using two amplifiers with at least 30W amplifier output per CH, it is possible to configure a multi-channel amplifier capable of accumulating output in a parallel structure and vary the output of the amplifier up to 2 x 30W = 60W.

In addition, by using four amplifiers with at least 30W amplifier output per CH, it is possible to configure a multi-channel amplifier capable of accumulating output in a parallel structure, allowing the amplifier output to be varied up to 4 x 30W = 120W.

In an embodiment, if eight amplifiers with a minimum amplifier output of 30W per CH are used, the output of the amplifier can be varied up to 8 x 30W = 240W by forming a multi-channel amplifier capable of output accumulation in a parallel structure.

In addition, by using 16 amplifiers with a minimum 30W amplifier output per CH, it is possible to configure a multi-channel amplifier capable of accumulating output in a parallel structure, allowing the amplifier output to be varied up to 16 x 30W = 480W.

Likewise, by using 32 amplifiers with a minimum of 30W amplifier output per CH, it is possible to configure a multi-channel amplifier capable of accumulating output in a parallel structure and vary the output of the amplifier up to 32 x 30W = 960W.

Referring to Figure 11, in a public address (PA) system, a digital amplifier that converts the output voltage to 100V and 70V for public address includes an audio jack (RCA) that receives audio input, Svr that adjusts the volume of the signal, and Pre- It consists of an amplifier, multiple amplifiers (A, B, C, D), a matching transformer (step up transformer), and a speaker. In the embodiment, SPEAKER uses a speaker that can receive 100V input for PA.

Figure 12 is a diagram illustrating amplifier technology that provides an output voltage of 100V or 70V using multiple amplifiers and multiple matching step up transformers in a school broadcasting system for public address (PA).

- Technology to create a single high-output amplifier with an output voltage of 100V or 70V using multiple low-output amplifiers (30W)

- Composed of an amplifier of equal performance and multiple step up trans to create a high output amplifier of 60W or more.

- If designed with the primary side amplifier (e.g. 8 ohm amplifier) voltage (12V) and five 18W amplifiers, an output of 18W*5 can be configured. At this time, the N ratio can be designed as N1/N2 (12V: 100V). At this time, the current amount of the amplifier becomes the power of 5 AMPs, just like a PBTL configuration.

It provides one high-output PA amplifier that provides an output voltage of 100V or 70V by using multiple low-output amplifiers and consisting of k output-variable transformers (step up transformers) in parallel structure.

Each transformer of the k matching transformers uses a step-up transformer,

Each step-up transformer has the same output value and impedance output characteristics.

Figure 13 is a diagram showing amplifier technology that provides an output voltage of 100V or 70V using multiple amplifiers and multiple matching step up transformers in a school broadcasting system for public address (PA).

It provides one high-output PA amplifier that provides an output voltage of 100V or 70V by using multiple low-output amplifiers and consisting of k output-variable transformers (step up transformers) in parallel structure.

Each transformer of the k matching transformers uses a step-up transformer,

Each step-up transformer has the same output value and impedance output characteristics.

Figure 14 shows amplifiers and speakers (high-pitched speakers, mid-pitched speakers, low-pitched speakers, and ultra-low-pitched speakers) of audio equipment or systems for events in specific spaces such as broadcasting studios and performance halls.

For reference, in home audio or car audio devices, the impedance of the speaker is constant at 4Ω or 8Ω, and the output voltage of the amplifier changes depending on the output level. For example, if an 8Ω speaker is connected to an amplifier with 100W output, the maximum output voltage is 28.3V.

S.R Amp is a normal amplifier with a speaker impedance of 4Ω.

S,R (Sound Reinforcement): Refers to a sound device or system for an event in a specific space (broadcasting studio, performance hall, etc.).

The PA amplifier is constant at 70V or 100V regardless of output capacity, and power consumption is determined by the impedance of the speaker connected to the output terminal.

Install a small number of high-power (low impedance) speakers as needed, and connect them to the amplifier through devices such as a speaker network or crossover, depending on the frequency band (high, medium, low, ultra-low) of each speaker.

Since the speaker line is not long (several to tens of meters), the effect of voltage drop on the line is small. It uses a low impedance transmission method and requires strong sound and high fidelity clarity.

Low Impedance: Number of Ω (2Ω, 4Ω, 8Ω, 16Ω)

Power amplifiers that adopt variable impedance have different output when the impedance of the connected speaker is between 2 and 8Ω.

For example, the output to the speaker is reduced when an 8Ω speaker is connected compared to when a 4Ω speaker is connected.

The present invention is not limited to the same configuration and operation as the specific embodiments to illustrate the technical idea as described above, and may be implemented with various modifications without departing from the technical idea and scope of the present invention. The scope should be determined by the patent claims described later.

Claims (5)

In a public address (PA) system,
Multiple multi-channel amplifiers equipped with at least one low-output amplifier of 30W or less;
The multi-channel multiple amplifiers output kx AMP (k times AMP output) for each of the N individual systems (N=1,2,3,..) in the order of k=1,2,3,.. To achieve this, N individual systems including k matching transformers connected to the number k of amplifiers are provided, and each of the N individual systems is sequentially divided into a single-stage structure, a two-stage structure, and a multi-stage structure. Each of the k amplifiers in a parallel structure is connected in parallel to the primary coil of each matching transformer k, and includes k matching transformers in a parallel structure that perform impedance matching with a plurality of speakers connected to the secondary coil,
The multi-channel plurality of amplifiers uses k amplifiers to produce the output of kx AMP (k times AMP output), and each transformer of the k matching transformers in the parallel structure uses a step-up transformer, and each step-up The transformer is a multi-channel amplifier equipped with a variable output multi-stage transformer in a public address system, with the same output power value and the same impedance output characteristics. According to paragraph 1,
The k matching transformers are equipped with variable output multi-stage transformers in a public address system using a step up transformer with the characteristics of N ratio (N1:N2, number of turns of primary side:secondary side coil). Channel amplifier. In a public address (PA) system,
Multiple multi-channel amplifiers equipped with at least one low-output amplifier of 30W or less; and
For each N individual system (N=1,2,3,..), one amplifier per channel is connected in parallel to the primary coil of each transformer k, and impedance matching with multiple speakers k connected to the secondary coil. It includes k matching transformers in a parallel structure that perform,
Output of kx AMP (k times AMP output) in that order such that the output voltage of the secondary coil of each of the k matching transformers of the parallel structure is output variable according to the design. To achieve this, it is connected to a single-stage structure, a two-stage structure, and a multi-stage structure,
The multi-channel plurality of amplifiers uses k amplifiers, each transformer of the k matching transformers in the parallel structure uses a step-up transformer, and each step-up transformer has the same output power value and the same impedance output characteristic. A multi-channel amplifier equipped with a variable output multi-stage transformer in a public address system. According to paragraph 3,
The k matching transformers are equipped with variable output multi-stage transformers in a public address system using a step up transformer with the characteristics of N ratio (N1:N2, number of turns of primary side:secondary side coil). Channel amplifier. According to any one of paragraphs 1 and 3,
The multiple multi-channel amplifiers are PA amplifiers, which are constant at 70V or 100V regardless of output capacity, and are variable output multi-stage in a public address system whose power consumption is determined by the impedance of the speaker connected to the output terminal. Multi-channel amplifier with transformer.