Loudspeaker power divider

Abstract

The utility model provides a loudspeaker power divider which comprises a magnetic induction coupling coil mutual inductance circuit and a first variable magnetic induction coupling coil mutual inductance circuit, and the first variable magnetic induction coupling coil mutual inductance circuit can respond to an output signal of the output end of the magnetic induction coupling coil mutual inductance circuit and output a second audio signal. The current magnitude of the second audio signal can be changed along with the change of the coil length of the first variable magnetic induction coupling coil mutual inductance circuit; the second variable magnetic induction coupling coil mutual inductance circuit can respond to an output signal of the output end of the magnetic induction coupling coil mutual inductance circuit and output a third audio signal; the current magnitude of the third audio signal can be changed along with the change of the coil length of the second variable magnetic induction coupling coil mutual inductance circuit, and the sound amplification system can adapt to the power required by terminal loudspeakers of different channels through the device, thereby achieving the purpose of power distribution of different channels, and facilitating the improvement of the use experience of the sound amplification system.

Description

Technical Field

[0001] The invention relates to the field of audio equipment, and in particular to a loudspeaker power distributor. Background Art

[0002] In an audio system, audio signals are amplified by power amplifiers and transmitted to speakers, which make the speakers produce sound. However, speakers of different powers need to be matched with power amplifier channels of corresponding output power in order for the speakers to produce "correct" sounds, making the audio system configuration more reasonable and cost-saving. In addition, speakers in normal working conditions will also have a longer service life.

[0003] In audio systems, it is often the case that the speakers connected to a multi-channel power amplifier are speakers of different powers - for example, a single-channel 1500W 4-channel power amplifier is connected to two 1000W low-frequency speakers and two 500W full-range speakers. This will cause the 1000W low-frequency speakers to have insufficient energy output at peak power, while for the 500W full-range speakers, the output power will be excessive. Summary of the invention

[0004] The purpose of the present invention is to provide a loudspeaker power distributor, which realizes reasonable power distribution for loudspeakers with different channel powers.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a speaker power distributor, comprising: a magnetic induction coupling coil mutual induction circuit, the input end of the magnetic induction coupling coil mutual induction circuit can receive an audio input signal, and the output end of the magnetic induction coupling coil mutual induction circuit can output a first audio signal; a first variable magnetic induction coupling coil mutual induction circuit, the first variable magnetic induction coupling coil mutual induction circuit can respond to the output signal of the output end of the magnetic induction coupling coil mutual induction circuit and output a second audio signal, and the current magnitude of the second audio signal can change with the change of the coil length of the first variable magnetic induction coupling coil mutual induction circuit; a second variable magnetic induction coupling coil mutual induction circuit, the second variable magnetic induction coupling coil mutual induction circuit can respond to the output signal of the output end of the magnetic induction coupling coil mutual induction circuit and output a third audio signal, and the current magnitude of the third audio signal can change with the change of the coil length of the second variable magnetic induction coupling coil mutual induction circuit.

[0006] Furthermore, the magnetic induction coupling coil mutual inductance circuit includes a main coil and a power amplifier, the power amplifier is connected to the main coil, and the audio input signal is input into the main coil via the power amplifier.

[0007] Furthermore, the winding wire diameter of the main coil is the same as the winding wire diameter of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit, and the winding wire diameter of the main coil is the same as the winding wire diameter of the mutual inductance coil of the second variable magnetic induction coupling coil mutual inductance circuit.

[0008] Furthermore, the number of turns of the main coil is half of the number of turns of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit; the number of turns of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit is the same as the number of turns of the mutual inductance coil of the second variable magnetic induction coupling coil mutual inductance circuit.

[0009] Furthermore, it also includes a power supply module, which is connected to the power amplifier and is connected to an external power supply to supply power to the power amplifier.

[0010] Furthermore, the power module includes a bridge rectifier and a filter capacitor, the input end of the bridge rectifier is connected to the external power supply, the output end of the bridge rectifier is connected to the power amplifier, and the filter capacitor is connected in parallel with the bridge rectifier.

[0011] Furthermore, the power module also includes an overvoltage protection unit, which is connected to the power module and can control the output voltage of the power module.

[0012] Furthermore, it also includes a first rectifier circuit and a second rectifier circuit, the first rectifier circuit is connected to the first variable magnetic induction coupling coil mutual induction circuit, and the second rectifier circuit is connected to the second variable magnetic induction coupling coil mutual induction circuit.

[0013] It can be seen from the analysis that the present invention discloses a speaker power distributor, through which the sound reinforcement system can adapt to the power required by the terminal speakers of different channels, thereby achieving the purpose of power distribution to different channels, which is beneficial to improving the user experience of the sound reinforcement system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0015] Figure 1 A schematic structural diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments. Each example is provided by way of explanation of the present invention and does not limit the present invention. In fact, it will be clear to those skilled in the art that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, a feature shown or described as a part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desired that the present invention encompasses such modifications and variations within the scope of the appended claims and their equivalents.

[0017] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connected", "connected" and "set" used in the present invention should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a direct connection or an indirect connection through an intermediate component; it can be a wired electrical connection, a radio connection, or a wireless communication signal connection. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0018] One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numbers and letter labels to refer to features in the drawings. Like or similar labels in the drawings and description have been used to refer to like or similar parts of the present invention. As used herein, the terms "first", "second", "third", and "fourth", etc. are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0019] As shown in FIG. 1 , according to an embodiment of the present invention, a loudspeaker power distributor is provided, comprising: a magnetic induction coupling coil mutual induction circuit, wherein the input end of the magnetic induction coupling coil mutual induction circuit can receive an audio input signal, and the output end of the magnetic induction coupling coil mutual induction circuit can output a first audio signal; a first variable magnetic induction coupling coil mutual induction circuit, wherein the first variable magnetic induction coupling coil mutual induction circuit can respond to an output signal of the output end of the magnetic induction coupling coil mutual induction circuit and output a second audio signal, and the current magnitude of the second audio signal can change with the change of the coil length of the first variable magnetic induction coupling coil mutual induction circuit; and a second variable magnetic induction coupling coil mutual induction circuit, wherein the second variable magnetic induction coupling coil mutual induction circuit can respond to an output signal of the output end of the magnetic induction coupling coil mutual induction circuit and output a third audio signal, and the current magnitude of the third audio signal can change with the change of the coil length of the second variable magnetic induction coupling coil mutual induction circuit.

[0020] The first variable magnetic induction coupling coil mutual inductance circuit and the second variable magnetic induction coupling coil mutual inductance circuit can change the number of winding turns of the circuit connected to themselves, thereby changing the output terminal voltage to further change the power at both ends of the coil; the first variable magnetic induction coupling coil mutual inductance circuit and the second variable magnetic induction coupling coil output the second audio signal and the third audio signal in response to the first audio signal output by the magnetic induction coupling coil mutual inductance circuit. Since the number of winding turns of the circuit connected to the first variable magnetic induction coupling coil mutual inductance circuit and the second variable magnetic induction coupling coil mutual inductance circuit are independently adjustable, the output power of the second audio signal and the third audio signal can be independently controlled.

[0021] The magnetic induction coupling coil mutual inductance circuit comprises a main coil and a power amplifier, the power amplifier is connected to the main coil, and the audio input signal is input into the main coil via the power amplifier.

[0022] The power amplifier can amplify the audio input signal, so that the main coil outputs the amplified audio signal, such as Figure 1 The main coil L3 shown is connected to a power amplifier, and the voltage (U+, U-) at both ends thereof is a first audio signal. The first variable magnetic induction coupling coil mutual inductance circuit includes a first secondary coil L1, a capacitor C1 and a resistor R1. One end of the first secondary coil L1 is connected to the capacitor C1 and then grounded, and the other end of the first secondary coil L1 is connected to one end of the resistor R1. The other end of the resistor R1 contacts the first secondary coil L1 and can change the contact position with the first secondary coil L1, thereby changing the number of winding turns of the first secondary coil L1 connected to the line to adjust the output power of the first secondary coil L1. By connecting a certain point of the resistor R1 and the other end of the first secondary coil L1, the output voltage (U1+, U1-) is used as the second audio signal. By changing the contact position with the resistor R1, the output voltage of the second audio signal can be changed. When in use, the resistor R1 can also be selected as a variable resistor. By changing the resistor R1 The output voltage can be changed by connecting the resistance value of the output voltage. The second variable magnetic induction coupling coil mutual inductance circuit includes a second secondary coil L2, a capacitor C2 and a resistor R2. One end of the second secondary coil L2 is connected to the capacitor C2 and then grounded, and the other end of the second secondary coil L2 is connected to one end of the resistor R2. The other end of the resistor R2 is in contact with the second secondary coil L2 and can change the contact position with the first secondary coil L2, thereby changing the number of winding turns of the second secondary coil L2 connected to the line to adjust the output power of the second secondary coil L2. By connecting a certain point of the resistor R2 and the other end of the second secondary coil L2, the output voltage (U2+, U2-) is used as the second audio signal. By changing the contact position with the resistor R2, the output voltage of the third audio signal can be changed. When in use, the resistor R2 can also be selected as a variable resistor. The output voltage can be changed by changing the resistance value of the resistor R2 connected to the output voltage.

[0023] When the audio source signal is connected to the input end of the magnetic induction coupling coil mutual induction circuit, the audio source signal is an analog quantity, which will cause the magnetic induction coupling coil mutual induction circuit to generate currents of different sizes under the action of the power module. The current flowing through the main coil L3 generates magnetic induction with the first secondary coil L1 and the second secondary coil L2 to generate a voltage-dividing current. The currents at the output end are equal in size. When the number of winding turns of the access line of the first secondary coil L1 and the second secondary coil L2 mutual induction coils changes, the distribution of different power outputs of the audio source signal can be achieved to meet the different power needs of different speakers, so that the power after passing through the speaker power distributor is different according to the load of different equipment, thereby improving the user experience of the sound reinforcement system.

[0024] The winding wire diameter of the main coil is the same as the winding wire diameter of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit, and the winding wire diameter of the main coil is the same as the winding wire diameter of the mutual inductance coil of the second variable magnetic induction coupling coil mutual inductance circuit. The number of turns of the main coil is half of the number of turns of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit; the number of turns of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit is the same as the number of turns of the mutual inductance coil of the second variable magnetic induction coupling coil mutual inductance circuit.

[0025] It also includes a power module, which is connected to the power amplifier, and the power module is connected to an external power supply and supplies power to the power amplifier. It includes a bridge rectifier and a filter capacitor, the input end of the bridge rectifier is connected to the external power supply, the output end of the bridge rectifier is connected to the power amplifier, and the filter capacitor is connected in parallel with the bridge rectifier. It also includes an overvoltage protection unit, which is connected to the power module and can control the output voltage of the power module.

[0026] The power module can provide stable power supply to the power amplifier to avoid unstable power supply voltage.

[0027] It also includes a first rectifier circuit and a second rectifier circuit. The first rectifier circuit is connected to the first variable magnetic induction coupling coil mutual induction circuit, and the second rectifier circuit is connected to the second variable magnetic induction coupling coil mutual induction circuit.

[0028] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: through this device, the sound reinforcement system can adapt to the power required by the terminal speakers of different channels, thereby achieving the purpose of power allocation to different channels, which is conducive to improving the user experience of the sound reinforcement system.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A loudspeaker power distributor, characterized in that: include: A magnetic induction coupling coil mutual induction circuit, wherein an input end of the magnetic induction coupling coil mutual induction circuit can receive an audio input signal, and an output end of the magnetic induction coupling coil mutual induction circuit can output a first audio signal; a first variable magnetic induction coupling coil mutual induction circuit, wherein the first variable magnetic induction coupling coil mutual induction circuit can respond to an output signal at an output end of the magnetic induction coupling coil mutual induction circuit and output a second audio signal, and a current magnitude of the second audio signal can vary with a change in a coil length of the first variable magnetic induction coupling coil mutual induction circuit; A second variable magnetic induction coupling coil mutual induction circuit, wherein the second variable magnetic induction coupling coil mutual induction circuit can respond to an output signal at an output end of the magnetic induction coupling coil mutual induction circuit and output a third audio signal, and the current magnitude of the third audio signal can change with the change of the coil length of the second variable magnetic induction coupling coil mutual induction circuit.

2. A loudspeaker power distributor according to claim 1, characterized in that: The magnetic induction coupling coil mutual induction circuit comprises a main coil and a power amplifier, the power amplifier is connected to the main coil, and the audio input signal is input into the main coil via the power amplifier.

3. A loudspeaker power distributor according to claim 2, characterized in that: The winding wire diameter of the main coil is the same as the winding wire diameter of the mutual inductance coil of the first variable magnetic induction coupling coil mutual inductance circuit, and the winding wire diameter of the main coil is the same as the winding wire diameter of the mutual inductance coil of the second variable magnetic induction coupling coil mutual inductance circuit.

4. A loudspeaker power distributor according to claim 2, characterized in that: The number of turns of the main coil is half of the number of turns of the mutual inductance coil of the first variable magnetic inductance coupling coil mutual inductance circuit; the number of turns of the mutual inductance coil of the first variable magnetic inductance coupling coil mutual inductance circuit is the same as the number of turns of the mutual inductance coil of the second variable magnetic inductance coupling coil mutual inductance circuit.

5. A loudspeaker power distributor according to claim 2, characterized in that: It also includes a power supply module, which is connected to the power amplifier and is connected to an external power supply to supply power to the power amplifier.

6. A loudspeaker power distributor according to claim 5, characterized in that: The power module comprises a bridge rectifier and a filter capacitor, the input end of the bridge rectifier is connected to the external power supply, the output end of the bridge rectifier is connected to the power amplifier, and the filter capacitor is connected in parallel with the bridge rectifier.

7. A loudspeaker power distributor according to claim 6, characterized in that: The power module further includes an overvoltage protection unit, which is connected to the power module and can control the output voltage of the power module.

8. A loudspeaker power distributor according to claim 1, characterized in that: It also includes a first rectifier circuit and a second rectifier circuit, wherein the first rectifier circuit is connected to the first variable magnetic induction coupling coil mutual induction circuit, and the second rectifier circuit is connected to the second variable magnetic induction coupling coil mutual induction circuit.

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