Safe power supply circuit of power amplifier power panel

Abstract

The invention discloses a safe power supply circuit of a power amplifier power panel, and relates to the technical field of power amplifier power panels. The intelligent control module is used for signal receiving and module control; the first input module is connected with the power supply module and is used for voltage stabilization and current expansion regulation; the polarity switching module is used for transmitting electric energy and changing the electric energy transmission directions of the second input module and the voltage stabilization control module; the second input module is used for voltage stabilization and current expansion regulation; the positive electrode control module is used for voltage stabilization regulation and voltage sampling and providing positive electrode electric energy; the voltage stabilization control module is used for voltage stabilization regulation, voltage sampling and providing positive electric energy or negative electric energy; and the output control module is used for controlling transmission and a transmission path of the electric energy and transmitting the output electric energy to a power amplifier board connected with the power amplifier board module. The safe power supply circuit of the power amplifier power board can meet the electric energy required by the power amplifier board and improve the power supply efficiency and the power supply stability of the power amplifier board.

Description

Technical Field

[0001] The invention relates to the technical field of power amplifier power supply boards, in particular to a safe power supply circuit of a power amplifier power supply board. Background Art

[0002] Amplifier power board, full name power amplifier power board, is a device that supplies power to the amplifier board, and its main function is to provide stable power for the amplifier board. The power board usually includes a stable supply of current and voltage, as well as filtering and protection functions to ensure that the amplifier board can work normally and output high-quality audio signals. The amplifier board in the prior art may require positive power supply or positive and negative power supply, so that the amplifier power board not only needs to provide positive voltage, but also needs to provide negative voltage, resulting in the amplifier power board requiring multiple voltage stabilizing devices to provide different positive voltages or negative voltages, increasing the size and cost of the amplifier power board, and if the voltage stabilizing device fluctuates during power supply, the amplifier board will be affected and then unable to work normally, so it needs to be improved. Summary of the invention

[0003] The embodiment of the present invention provides a safe power supply circuit for a power amplifier power board to solve the problems raised in the above background technology.

[0004] According to an embodiment of the present invention, a safe power supply circuit of a power amplifier power board is provided, comprising: a power module, an intelligent control module, a first input module, a second input module, a positive electrode control module, a voltage stabilization control module, a polarity switching module, an output control module and a power amplifier board module;

[0005] a power module connected to the intelligent control module and the second input module, for rectifying the AC power received and outputting the first power and the second power, and stopping outputting the second power and transmitting the first power to the second input module upon receiving a switching signal output by the intelligent control module;

[0006] An intelligent control module, connected to the positive control module and the voltage stabilizing control module, for receiving a first sampling signal output by the positive control module and a second sampling signal output by the voltage stabilizing control module, outputting a first regulating signal and a second regulating signal, outputting a first switching signal and a second switching signal, and outputting a switching signal when the power amplifier board requires two positive power supplies or the electric energy in the positive state provided by the positive control module or the voltage stabilizing control module fluctuates, outputting a first control signal and stopping outputting the second switching signal when the switching signal is output and the first sampling signal fluctuates, and outputting a second control signal and stopping outputting the first switching signal when the switching signal is output and the second sampling signal fluctuates;

[0007] A first input module, connected to the power module, for performing voltage stabilization and current expansion regulation processing on the first electric energy and outputting the first positive electric energy;

[0008] a polarity switching module connected to the second input module, the voltage stabilizing control module, the intelligent control module and the power module, and configured to transmit the first electric energy to the second input module and the voltage stabilizing control module and change the electric energy transmission direction of the second input module and the voltage stabilizing control module upon receiving a switching signal;

[0009] A second input module is used to perform voltage stabilization and current expansion regulation processing on the first electric energy and output the second positive electric energy, and to perform voltage stabilization and current expansion regulation processing on the second electric energy and output the first negative electric energy;

[0010] A positive control module, connected to the first input module, for performing voltage regulation on the first positive electric energy and outputting the third positive electric energy, performing voltage sampling on the third positive electric energy and outputting the first sampling signal, and adjusting the voltage value of the first sampling signal and the voltage value of the third positive electric energy when receiving the first adjustment signal;

[0011] A voltage stabilization control module, connected to the second input module, for performing voltage stabilization and regulation processing on the second positive electrode electric energy and outputting the fourth positive electrode electric energy, performing voltage stabilization and regulation processing on the first negative electrode electric energy and outputting the second negative electrode electric energy, performing voltage sampling on the fourth positive electrode electric energy or the second negative electrode electric energy and outputting the second sampling signal, and adjusting the voltage value of the second sampling signal and adjusting the voltage value of the fourth positive electrode electric energy or the second negative electrode electric energy when receiving the second regulation signal;

[0012] An output control module, connected to the positive control module, the voltage stabilizing control module, the intelligent control module and the power amplifier board module, for transmitting the third positive electric energy to the power amplifier board module when receiving a first switch signal, transmitting the second negative electric energy or the fourth positive electric energy to the power amplifier board module when receiving a second switch signal, stopping the transmission of the second negative electric energy or the fourth positive electric energy and switching the electric energy transmission path of the third positive electric energy when receiving a first control signal, and stopping the transmission of the third positive electric energy and switching the electric energy transmission path of the second negative electric energy or the fourth positive electric energy when receiving a second control signal;

[0013] The power amplifier board module is used to transmit the received third positive pole electric energy, fourth positive pole electric energy or second negative pole electric energy to the connected power amplifier board.

[0014] As a further solution of the present invention: the power module includes a power interface, a first rectifier, a sixth resistor, a sixth thyristor, an eleventh thyristor and a first thyristor; the intelligent control module includes a first controller;

[0015] Preferably, the first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the anode of the eleventh thyristor, the first input module and the first end of the sixth resistor, the second end of the sixth resistor is connected to the control end of the sixth thyristor and the polarity switching module, the fourth end of the first rectifier is connected to the cathode of the first thyristor, the anode of the first thyristor is grounded, the control end of the first thyristor is connected to the control end of the eleventh thyristor and the IO1 end of the first controller, and the anode of the sixth thyristor is connected to the cathode of the eleventh thyristor and the second input module.

[0016] As a further solution of the present invention: the first input module includes a first capacitor, a first resistor, a first switch tube, a second switch tube, a first diode, a second diode, a first potentiometer, a second capacitor and a third diode;

[0017] Preferably, one end of the first resistor is connected to the third end of the first rectifier, the collector of the first switching tube, the collector of the second switching tube and the cathode of the third diode, and is connected to one end of the second capacitor and the ground through the first capacitor; the other end of the first resistor is connected to the cathode of the first diode and the base of the first switching tube, the emitter of the first switching tube is connected to the base of the second switching tube, the emitter of the second switching tube is connected to the slider end of the first potentiometer and the positive control module through the first potentiometer, the anode of the first diode is connected to the anode of the third diode and the cathode of the second diode, and the anode of the second diode is connected to the anode of the second capacitor.

[0018] As a further solution of the present invention: the positive electrode control module includes a first voltage stabilizer, a fourth resistor, a third resistor, a fifth resistor, a seventh resistor, an eighth resistor, a first power tube, a fourth diode and a third capacitor;

[0019] Preferably, the IN end of the first voltage regulator is connected to the slider end of the first potentiometer, the OUT end of the first voltage regulator is connected to the anode of the third diode, one end of the third capacitor, one end of the fourth resistor, one end of the fifth resistor and the cathode of the second diode, and the ADJ end of the first voltage regulator, one end of the third resistor and the cathode of the fourth diode are connected through the eighth resistor, the other end of the third resistor is connected to the anode of the second diode, the other end of the fourth resistor is connected to the drain of the first power tube, the source of the first power tube is connected to the other end of the fifth resistor, the IO2 end of the first controller and the anode of the fourth diode, and the other end of the third capacitor and the ground through the seventh resistor, and the gate of the first power tube is connected to the IO3 end of the first controller.

[0020] As a further solution of the present invention: the second input module includes a second resistor, a fourth capacitor, a third switch tube, a fourth switch tube, a second potentiometer, a seventh thyristor, a tenth thyristor, a ninth thyristor and a fifth capacitor;

[0021] Preferably, one end of the second resistor is connected to the cathode of the sixth thyristor, the collector of the third switch tube, the collector of the fourth switch tube and the anode of the seventh thyristor and is connected to one end of the fifth capacitor and the ground through the fourth capacitor, the other end of the second resistor is connected to the base of the third switch tube and the anode of the tenth thyristor, the emitter of the third switch tube is connected to the base of the fourth switch tube, the emitter of the fourth switch tube is connected to one end of the second potentiometer, the other end of the second potentiometer and the slider end are both connected to the voltage stabilizing control module, the cathode of the seventh thyristor is connected to the cathode of the tenth thyristor and the anode of the ninth thyristor, the cathode of the ninth thyristor is connected to the other end of the fifth capacitor, and the control end of the ninth thyristor is connected to the control end of the tenth thyristor, the control end of the seventh thyristor and the second end of the sixth resistor.

[0022] As a further solution of the present invention: the voltage stabilization control module includes a second voltage stabilizer, a ninth resistor, a tenth resistor, an eighth thyristor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second power tube and a sixth capacitor;

[0023] Preferably, the IN end of the second voltage regulator is connected to the slider end of the second potentiometer, the OUT end of the second voltage regulator is connected to one end of the sixth capacitor, one end of the tenth resistor and one end of the eleventh resistor and is connected to the drain of the second power tube through the thirteenth resistor, the source of the second power tube is connected to the other end of the eleventh resistor, the IO5 end of the first controller and the cathode of the eighth thyristor and is connected to the other end of the sixth capacitor and the ground through the twelfth resistor, the anode of the eighth thyristor is connected to the other end of the tenth resistor and the ADJ end of the first voltage regulator and is connected to the cathode of the ninth thyristor through the ninth resistor, the control end of the eighth thyristor is connected to the second end of the sixth resistor, and the gate of the second power tube is connected to the IO4 end of the first controller.

[0024] As a further solution of the present invention: the polarity switching module includes a fourth thyristor, a third thyristor, a fifth switch tube, a fifth thyristor and a second thyristor;

[0025] Preferably, the cathode of the third thyristor is connected to the anode of the fourth thyristor and the anode of the ninth thyristor, the cathode of the fourth thyristor is connected to the cathode of the tenth thyristor, the anode of the third thyristor is connected to the cathode of the ninth thyristor, the cathode of the second thyristor is connected to the anode of the eighth thyristor, the anode of the second thyristor is connected to the cathode of the eighth thyristor, the cathode of the fifth thyristor is connected to the anode of the seventh thyristor, the anode of the fifth thyristor is connected to the cathode of the seventh thyristor, the control end of the fifth thyristor is connected to the control end of the third thyristor, the control end of the fourth thyristor, the control end of the second thyristor, the base of the fifth switch tube and the IO1 end of the first controller, the emitter of the fifth switch tube is grounded, and the collector of the fifth switch tube is connected to the second end of the sixth resistor.

[0026] As a further solution of the present invention: the output control module includes a first relay, a first relay switch, a second relay, a second relay switch, a third power tube and a fourth power tube; the power amplifier board module includes a power amplifier board power port;

[0027] Preferably, the moving end of the first relay switch and the moving end of the second relay switch are respectively connected to the OUT end of the first voltage stabilizer and the OUT end of the second voltage stabilizer, the static end of the first relay switch is connected to the drain of the third power tube and the first end of the power interface of the power amplifier board, the source of the third power tube is connected to the source of the fourth power tube, the drain of the fourth power tube is connected to the static end of the second relay switch and the second end of the power interface of the power amplifier board, the control end of the first relay and the control end of the second relay are respectively connected to the IO7 end and IO6 end of the first controller, and the gate of the third power tube and the gate of the fourth power tube are respectively connected to the IO8 end and IO9 end of the first controller.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: the safe power supply circuit of the power amplifier power board of the present invention comprises a positive control module cooperating with the first input module to perform positive voltage stabilization and current regulation on the electric energy connected to the power module, a voltage stabilization control module cooperating with the second input module to perform negative voltage stabilization and current regulation, an intelligent control module cooperating with the switching control module to control the voltage stabilization control module to cooperate with the second input module to perform positive voltage stabilization and current regulation, and at the same time, the intelligent control module can also adjust the voltage output by the positive control module and the voltage stabilization control module to meet the electric energy required by the power amplifier board, when the electric energy output by the positive control module fluctuates, the output control module can switch the power supply path, and control the voltage stabilization control module to replace the positive control module for power supply, and similarly, when the positive voltage of the voltage stabilization control module fluctuates, the positive control module replaces the voltage stabilization control module for power supply, thereby improving the power supply efficiency and power supply stability to the power amplifier board. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0030] Figure 1 A schematic block diagram of a safety power supply circuit for a power amplifier power board provided in an embodiment of the present invention.

[0031] Figure 2 A circuit diagram of a safety power supply circuit of a power amplifier power board provided in an embodiment of the present invention.

[0032] Figure 3 A circuit diagram of an output control module provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In one embodiment, see Figure 1 , a safe power supply circuit of a power amplifier power board, comprising: a power module 1, an intelligent control module 2, a first input module 3, a second input module 4, a positive control module 5, a voltage stabilization control module 6, a polarity switching module 7, an output control module 8 and a power amplifier board module 9;

[0035] Specifically, the power module 1 is connected to the intelligent control module 2 and the second input module 4, and is used to rectify the connected AC power and output the first power and the second power, and when receiving the switching signal output by the intelligent control module 2, stops outputting the second power and transmits the first power to the second input module 4;

[0036] The intelligent control module 2 is connected to the positive control module 5 and the voltage stabilizing control module 6, and is used to receive the first sampling signal output by the positive control module 5 and the second sampling signal output by the voltage stabilizing control module 6, output the first adjustment signal and the second adjustment signal, output the first switching signal and the second switching signal, and output the switching signal when the power amplifier board needs two positive power supplies or the positive state electric energy provided by the positive control module 5 or the voltage stabilizing control module 6 fluctuates. When the switching signal is output and the first sampling signal fluctuates, the first control signal is output and the second switching signal is stopped. When the switching signal is output and the second sampling signal fluctuates, the second control signal is output and the first switching signal is stopped;

[0037] A first input module 3, connected to the power module 1, for performing voltage stabilization and current expansion regulation on the first electric energy and outputting the first positive electric energy;

[0038] a polarity switching module 7, connected to the second input module 4, the voltage stabilizing control module 6, the intelligent control module 2 and the power module 1, for transmitting the first electric energy to the second input module 4 and the voltage stabilizing control module 6 and changing the electric energy transmission direction of the second input module 4 and the voltage stabilizing control module 6 upon receiving a switching signal;

[0039] The second input module 4 is used to perform voltage stabilization and current expansion regulation processing on the first electric energy and output the second positive electric energy, and to perform voltage stabilization and current expansion regulation processing on the second electric energy and output the first negative electric energy;

[0040] A positive control module 5, connected to the first input module 3, is used to perform voltage regulation on the first positive electric energy and output the third positive electric energy, perform voltage sampling on the third positive electric energy and output the first sampling signal, and when receiving the first adjustment signal, adjust the voltage value of the first sampling signal and the voltage value of the third positive electric energy;

[0041] A voltage stabilization control module 6 is connected to the second input module 4, and is used to perform voltage stabilization and regulation processing on the second positive electrode electric energy and output the fourth positive electrode electric energy, perform voltage stabilization and regulation processing on the first negative electrode electric energy and output the second negative electrode electric energy, perform voltage sampling on the fourth positive electrode electric energy or the second negative electrode electric energy and output the second sampling signal, and when receiving the second adjustment signal, adjust the voltage value of the second sampling signal, and adjust the voltage value of the fourth positive electrode electric energy or the second negative electrode electric energy;

[0042] The output control module 8 is connected to the positive control module 5, the voltage stabilizing control module 6, the intelligent control module 2 and the power amplifier board module 9, and is used to transmit the third positive electrode electric energy to the power amplifier board module 9 when receiving the first switch signal, and transmit the second negative electrode electric energy or the fourth positive electrode electric energy to the power amplifier board module 9 when receiving the second switch signal, and stop transmitting the second negative electrode electric energy or the fourth positive electrode electric energy and switch the electric energy transmission path of the third positive electrode electric energy when receiving the first control signal, and stop transmitting the third positive electrode electric energy and switch the electric energy transmission path of the second negative electrode electric energy or the fourth positive electrode electric energy when receiving the second control signal;

[0043] The power amplifier board module 9 is used to transmit the received third positive pole electric energy, fourth positive pole electric energy or second negative pole electric energy to the connected power amplifier board.

[0044] In a specific embodiment, the power supply module 1 may adopt a power supply circuit composed of a power supply interface, a rectifier, a thyristor, etc., which may be connected to AC power and rectify the AC power, and control the transmission path of the power; the intelligent control module 2 may adopt an intelligent control circuit composed of a single-chip microcomputer, which integrates many components such as an arithmetic unit, a controller, a memory, and an input / output device to realize functions such as signal processing, data storage, module control, and timing control; the first input module 3 may adopt a first input circuit composed of a diode, a triode, a capacitor, a resistor, etc., which may stabilize the voltage and expand the current of the input power; the second input module 4 may adopt a second input circuit composed of a thyristor, a triode, a capacitor, a potentiometer, etc., which may stabilize the voltage and expand the current of the input power; the positive control module 5 may adopt a positive control circuit composed of a voltage stabilizer, a resistor, a field effect transistor, a capacitor, etc. , the input electric energy can be regulated and processed to output positive electric energy, the output electric energy can be voltage sampled, the voltage division value can be adjusted and the output electric energy can be adjusted; the above-mentioned voltage stabilization control module 6 can adopt a voltage stabilization control circuit composed of thyristors, voltage stabilizers, resistors, field effect transistors, etc., to regulate the input electric energy and output negative electric energy, to sample the voltage of the output electric energy, adjust the voltage division value and adjust the output electric energy, and output positive electric energy according to the electric energy transmission control of the polarity switching module 7; the above-mentioned polarity switching module 7 can adopt a polarity switching circuit composed of thyristors and triodes to change the electric energy transmission direction of the voltage stabilization control module 6; the above-mentioned output control module 8 can adopt an output control circuit composed of relays, relay switches, and field effect transistors to control the transmission and transmission path of electric energy; the above-mentioned power amplifier board module 9 can adopt a power amplifier board circuit composed of a power amplifier board power interface, which is connected to the power amplifier board and supplies power to the power amplifier board.

[0045] In another embodiment, see Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface, a first rectifier T1, a sixth resistor R6, a sixth thyristor S6, an eleventh thyristor S11 and a first thyristor S1; the intelligent control module 2 includes a first controller U1;

[0046] Specifically, the first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier T1, the third end of the first rectifier T1 is connected to the anode of the eleventh thyristor S11, the first input module 3 and the first end of the sixth resistor R6, the second end of the sixth resistor R6 is connected to the control end of the sixth thyristor S6 and the polarity switching module 7, the fourth end of the first rectifier T1 is connected to the cathode of the first thyristor S1, the anode of the first thyristor S1 is grounded, the control end of the first thyristor S1 is connected to the control end of the eleventh thyristor S11 and the IO1 end of the first controller U1, and the anode of the sixth thyristor S6 is connected to the cathode of the eleventh thyristor S11 and the second input module 4.

[0047] In a specific embodiment, the sixth thyristor S6, the eleventh thyristor S11 and the first thyristor S1 can all be unidirectional thyristors; the first controller U1 can be an STM32 single chip microcomputer.

[0048] Furthermore, the first input module 3 includes a first capacitor C1, a first resistor R1, a first switch tube V1, a second switch tube V2, a first diode D1, a second diode D2, a first potentiometer RP1, a second capacitor C2 and a third diode D3;

[0049] Specifically, one end of the first resistor R1 is connected to the third end of the first rectifier T1, the collector of the first switch tube V1, the collector of the second switch tube V2 and the cathode of the third diode D3, and is connected to one end of the second capacitor C2 and the ground through the first capacitor C1. The other end of the first resistor R1 is connected to the cathode of the first diode D1 and the base of the first switch tube V1, the emitter of the first switch tube V1 is connected to the base of the second switch tube V2, the emitter of the second switch tube V2 is connected to the slider end of the first potentiometer RP1 and the positive control module 5 through the first potentiometer RP1, the anode of the first diode D1 is connected to the anode of the third diode D3 and the cathode of the second diode D2, and the anode of the second diode D2 is connected to the anode of the second capacitor C2.

[0050] In a specific embodiment, the first switch tube V1 and the second switch tube V2 can both be NPN transistors, and cooperate with the first potentiometer RP1 to perform current expansion adjustment; the first diode D1, the second diode D2, the third diode D3, the second capacitor C2 and the first capacitor C1 perform voltage stabilization and filtering.

[0051] Further, the positive control module 5 includes a first voltage regulator IC1, a fourth resistor R4, a third resistor R3, a fifth resistor R5, a seventh resistor R7, an eighth resistor R8, a first power tube Q1, a fourth diode D4 and a third capacitor C3;

[0052] Specifically, the IN end of the first voltage regulator IC1 is connected to the slider end of the first potentiometer RP1, the OUT end of the first voltage regulator IC1 is connected to the anode of the third diode D3, one end of the third capacitor C3, one end of the fourth resistor R4, one end of the fifth resistor R5 and the cathode of the second diode D2, and is connected to the ADJ end of the first voltage regulator IC1, one end of the third resistor R3 and the cathode of the fourth diode D4 through the eighth resistor R8, the other end of the third resistor R3 is connected to the anode of the second diode D2, the other end of the fourth resistor R4 is connected to the drain of the first power tube Q1, the source of the first power tube Q1 is connected to the other end of the fifth resistor R5, the IO2 end of the first controller U1 and the anode of the fourth diode D4, and is connected to the other end of the third capacitor C3 and the ground through the seventh resistor R7, and the gate of the first power tube Q1 is connected to the IO3 end of the first controller U1.

[0053] In a specific embodiment, the first voltage regulator IC1 can use a LM317 three-terminal voltage regulator; the fifth resistor R5 and the seventh resistor R7 perform voltage sampling; the first power tube Q1 can use an N-channel field effect tube, which cooperates with the fourth resistor R4 to adjust the signals output by the fifth resistor R5 and the seventh resistor R7.

[0054] Further, the second input module 4 includes a second resistor R2, a fourth capacitor C4, a third switch tube V3, a fourth switch tube V4, a second potentiometer RP2, a seventh thyristor S7, a tenth thyristor S10, a ninth thyristor S9 and a fifth capacitor C5;

[0055] Specifically, one end of the second resistor R2 is connected to the cathode of the sixth thyristor S6, the collector of the third switch tube V3, the collector of the fourth switch tube V4 and the anode of the seventh thyristor S7, and is connected to one end of the fifth capacitor C5 and the ground through the fourth capacitor C4. The other end of the second resistor R2 is connected to the base of the third switch tube V3 and the anode of the tenth thyristor S10. The emitter of the third switch tube V3 is connected to the base of the fourth switch tube V4. The emitter of the fourth switch tube V4 is connected to one end of the second potentiometer RP2. The other end and the slider end of the second potentiometer RP2 are both connected to the voltage stabilizing control module 6. The cathode of the seventh thyristor S7 is connected to the cathode of the tenth thyristor S10 and the anode of the ninth thyristor S9. The cathode of the ninth thyristor S9 is connected to the other end of the fifth capacitor C5. The control end of the ninth thyristor S9 is connected to the control end of the tenth thyristor S10, the control end of the seventh thyristor S7 and the second end of the sixth resistor R6.

[0056] In a specific embodiment, the third switch tube V3 and the fourth switch tube V4 may be NPN transistors, and cooperate with the second potentiometer RP2 to adjust the current expansion; the seventh thyristor S7, the ninth thyristor S9 and the tenth thyristor S10 may be unidirectional thyristors.

[0057] Further, the voltage stabilization control module 6 includes a second voltage stabilizer IC2, a ninth resistor R9, a tenth resistor R10, an eighth thyristor S8, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a second power tube Q2 and a sixth capacitor C6;

[0058] Specifically, the IN end of the second voltage regulator IC2 is connected to the slider end of the second potentiometer RP2, the OUT end of the second voltage regulator IC2 is connected to one end of the sixth capacitor C6, one end of the tenth resistor R10 and one end of the eleventh resistor R11, and is connected to the drain of the second power tube Q2 through the thirteenth resistor R13, the source of the second power tube Q2 is connected to the other end of the eleventh resistor R11, the IO5 end of the first controller U1 and the cathode of the eighth thyristor S8, and is connected to the other end of the sixth capacitor C6 and the ground end through the twelfth resistor R12, the anode of the eighth thyristor S8 is connected to the other end of the tenth resistor R10 and the ADJ end of the first voltage regulator IC1 and is connected to the cathode of the ninth thyristor S9 through the ninth resistor R9, the control end of the eighth thyristor S8 is connected to the second end of the sixth resistor R6, and the gate of the second power tube Q2 is connected to the IO4 end of the first controller U1.

[0059] In a specific embodiment, the second voltage regulator IC2 can use a LM3177 three-terminal voltage regulator; the eighth thyristor S8 can use a unidirectional thyristor; the eleventh resistor R11 and the twelfth resistor R12 perform voltage sampling; the second power tube Q2 can use an N-channel field effect tube, and cooperate with the thirteenth resistor R13 to adjust the voltage of the signal output by the voltage divider of the eleventh resistor R11 and the twelfth resistor R12.

[0060] Further, the polarity switching module 7 includes a fourth thyristor S4, a third thyristor S3, a fifth switch tube V5, a fifth thyristor S5 and a second thyristor S2;

[0061] Specifically, the cathode of the third thyristor S3 is connected to the anode of the fourth thyristor S4 and the anode of the ninth thyristor S9, the cathode of the fourth thyristor S4 is connected to the cathode of the tenth thyristor S10, the anode of the third thyristor S3 is connected to the cathode of the ninth thyristor S9, the cathode of the second thyristor S2 is connected to the anode of the eighth thyristor S8, the anode of the second thyristor S2 is connected to the cathode of the eighth thyristor S8, the cathode of the fifth thyristor S5 is connected to the anode of the seventh thyristor S7, the anode of the fifth thyristor S5 is connected to the cathode of the seventh thyristor S7, the control end of the fifth thyristor S5 is connected to the control end of the third thyristor S3, the control end of the fourth thyristor S4, the control end of the second thyristor S2, the base of the fifth switch tube V5 and the IO1 end of the first controller U1, the emitter of the fifth switch tube V5 is grounded, and the collector of the fifth switch tube V5 is connected to the second end of the sixth resistor R6.

[0062] In a specific embodiment, the fourth thyristor S4, the third thyristor S3, the fifth thyristor S5 and the second thyristor S2 can all be unidirectional thyristors to control the voltage stabilization control module 6 to output positive power; the fifth switch tube V5 can be an NPN transistor.

[0063] Further, the output control module 8 includes a first relay K1, a first relay switch K1-1, a second relay K2, a second relay switch K2-1, a third power tube Q3 and a fourth power tube Q4; the power amplifier board module 9 includes a power amplifier board power port;

[0064] Specifically, the moving end of the first relay switch K1-1 and the moving end of the second relay switch K2-1 are respectively connected to the OUT end of the first voltage regulator IC1 and the OUT end of the second voltage regulator IC2, the static end of the first relay switch K1-1 is connected to the drain of the third power tube Q3 and the first end of the power interface of the power amplifier board, the source of the third power tube Q3 is connected to the source of the fourth power tube Q4, the drain of the fourth power tube Q4 is connected to the static end of the second relay switch K2-1 and the second end of the power interface of the power amplifier board, the control end of the first relay K1 and the control end of the second relay K2 are respectively connected to the IO7 end and IO6 end of the first controller U1, and the gate of the third power tube Q3 and the gate of the fourth power tube Q4 are respectively connected to the IO8 end and IO9 end of the first controller U1.

[0065] In a specific embodiment, the first relay switch K1-1 and the second relay switch K2-1 can both be normally open switches, and are respectively controlled by the first relay K1 and the second relay K2 by magnetic attraction; the third power tube Q3 and the fourth power tube Q4 can both be N-channel field effect tubes.

[0066] In a safety power supply circuit of a power amplifier power board of the present embodiment, AC power is connected by a power interface, a first rectifier T1 performs rectification processing, and a fourth end of the first rectifier T1 outputs the first power, and a sixth thyristor S6, a seventh thyristor S7, an eighth thyristor S8, a ninth thyristor S9 and a tenth thyristor S10 are triggered to be turned on through a sixth resistor R6, and a current value of the input power is adjusted by a first switch tube V1, a second switch tube V2 and a first potentiometer RP1, and a voltage sampling is performed on the power output by the first voltage regulator IC1 through a fifth resistor R5 and a seventh resistor R7, and a first sampling signal is output, and the first voltage regulator IC1 receives the first sampling signal, and cooperates with a third diode D3 and a first diode D1 to conduct. , the second diode D2, the second capacitor C2, the fourth diode D4, the eighth resistor R8 and the third resistor R3 perform voltage stabilization and regulation processing to output the third positive electrode electric energy, the IO3 end of the first controller can adjust the conduction state of the first power tube Q1, cooperate with the fourth resistor R4 to adjust the voltage of the first sampling signal output by the fifth resistor R5 and the seventh resistor R7, so as to adjust the voltage output by the first voltage regulator IC1, the second electric energy output by the fourth end of the first rectifier T1 is transmitted to the second input module 4 through the sixth thyristor S6, and similarly the second input module 4 performs voltage stabilization and current expansion processing, the voltage stabilization control module 6 outputs the second negative electrode electric energy, and the IO4 end of the first controller U1 can adjust the second power tube Q2 The first controller U1 is in the on state, and cooperates with the thirteenth resistor R13 to adjust the voltage of the second sampling signal output by the eleventh resistor R11 and the twelfth resistor R12, so as to adjust the electric energy voltage output by the second voltage regulator IC2. At the same time, the IO7 terminal and IO6 terminal of the first controller U1 respectively control the first relay K1 and the second relay to work, and the first relay switch K1-1 and the second relay switch K2-1 are closed to provide positive and negative electric energy for the power supply interface of the power amplifier board. When two sets of positive electric energy are needed, the IO1 terminal of the first controller U1 controls the fifth switch tube V5, the third thyristor S3, the fourth thyristor S4, the fifth thyristor S5 and the second thyristor S2 to be turned on, and the ninth thyristor S9, the tenth thyristor S10, the seventh thyristor S11 are turned on. The thyristor S7 and the eighth thyristor S8 are cut off, and the second voltage regulator IC2 will output the fourth positive electrode electric energy. If the power amplifier board only needs the electric energy output by the positive electrode control module 5 and the IO2 end of the first controller U1 determines that the first sampling signal fluctuates, the IO4 end of the first controller U1 controls the fourth power tube Q4 to be turned on and off, and the first relay switch K1-1 is disconnected, so that the fourth positive electrode electric energy output by the second voltage regulator IC2 is transmitted to the first end of the power interface of the power amplifier board. Similarly, when the fourth positive electrode electric energy output by the voltage stabilizing output module fluctuates, the IO8 end of the first controller U1 controls the third power tube Q3 to be turned on and disconnects the second relay switch K2-1, so that the positive electrode control module 5 supplies power to the second end of the power interface of the power amplifier board.

[0067] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0068] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A safe power supply circuit for a power amplifier power board, characterized in that: The safety power supply circuit of the power amplifier power board includes: a power module, an intelligent control module, a first input module, a second input module, a positive control module, a voltage stabilization control module, a polarity switching module, an output control module and a power amplifier board module; The power module is connected to the intelligent control module and the second input module, and is used to rectify the AC power received and output the first power and the second power, and when receiving the switching signal output by the intelligent control module, stops outputting the second power and transmits the first power to the second input module; The intelligent control module is connected to the positive control module and the voltage stabilizing control module, and is used to receive the first sampling signal output by the positive control module and the second sampling signal output by the voltage stabilizing control module, output the first adjustment signal and the second adjustment signal, output the first switch signal and the second switch signal, and output the switching signal when the power amplifier board needs two positive power supplies or the electric energy in the positive state provided by the positive control module or the voltage stabilizing control module fluctuates. When the switching signal is output and the first sampling signal fluctuates, the first control signal is output and the second switch signal is stopped. When the switching signal is output and the second sampling signal fluctuates, the second control signal is output and the first switch signal is stopped; The first input module is connected to the power module and is used to perform voltage stabilization and current expansion regulation on the first electric energy and output the first positive electric energy; The polarity switching module is connected to the second input module, the voltage stabilizing control module, the intelligent control module and the power module, and is used to transmit the first electric energy to the second input module and the voltage stabilizing control module and change the electric energy transmission direction of the second input module and the voltage stabilizing control module when receiving the switching signal; The second input module is used to perform voltage stabilization and current expansion regulation processing on the first electric energy and output the second positive electric energy, and to perform voltage stabilization and current expansion regulation processing on the second electric energy and output the first negative electric energy; The positive control module is connected to the first input module, and is used to perform voltage regulation on the first positive electric energy and output the third positive electric energy, perform voltage sampling on the third positive electric energy and output the first sampling signal, and when receiving the first adjustment signal, adjust the voltage value of the first sampling signal and the voltage value of the third positive electric energy; The voltage stabilization control module is connected to the second input module, and is used to perform voltage stabilization and regulation processing on the second positive electrode electric energy and output the fourth positive electrode electric energy, perform voltage stabilization and regulation processing on the first negative electrode electric energy and output the second negative electrode electric energy, perform voltage sampling on the fourth positive electrode electric energy or the second negative electrode electric energy and output the second sampling signal, and when receiving the second adjustment signal, adjust the voltage value of the second sampling signal, and adjust the voltage value of the fourth positive electrode electric energy or the second negative electrode electric energy; The output control module is connected to the positive control module, the voltage stabilization control module, the intelligent control module and the power amplifier board module, and is used to transmit the third positive electric energy to the power amplifier board module when receiving the first switch signal, and transmit the second negative electric energy or the fourth positive electric energy to the power amplifier board module when receiving the second switch signal, and stop transmitting the second negative electric energy or the fourth positive electric energy and switch the electric energy transmission path of the third positive electric energy when receiving the first control signal, and stop transmitting the third positive electric energy and switch the electric energy transmission path of the second negative electric energy or the fourth positive electric energy when receiving the second control signal; The power amplifier board module is used to transmit the received third positive pole electric energy, fourth positive pole electric energy or second negative pole electric energy to the connected power amplifier board.

2. The safe power supply circuit of a power amplifier power board according to claim 1, characterized in that: The power module includes a power interface, a first rectifier, a sixth resistor, a sixth thyristor, an eleventh thyristor and a first thyristor; the intelligent control module includes a first controller; The first end and the second end of the power interface are respectively connected to the first end and the second end of the first rectifier, the third end of the first rectifier is connected to the anode of the eleventh thyristor, the first input module and the first end of the sixth resistor, the second end of the sixth resistor is connected to the control end of the sixth thyristor and the polarity switching module, the fourth end of the first rectifier is connected to the cathode of the first thyristor, the anode of the first thyristor is grounded, the control end of the first thyristor is connected to the control end of the eleventh thyristor and the IO1 end of the first controller, and the anode of the sixth thyristor is connected to the cathode of the eleventh thyristor and the second input module.

3. The safe power supply circuit of a power amplifier power board according to claim 2, characterized in that: The first input module includes a first capacitor, a first resistor, a first switch tube, a second switch tube, a first diode, a second diode, a first potentiometer, a second capacitor and a third diode; One end of the first resistor is connected to the third end of the first rectifier, the collector of the first switch tube, the collector of the second switch tube and the cathode of the third diode, and is connected to one end of the second capacitor and the ground through the first capacitor. The other end of the first resistor is connected to the cathode of the first diode and the base of the first switch tube, the emitter of the first switch tube is connected to the base of the second switch tube, the emitter of the second switch tube is connected to the slider end of the first potentiometer and the positive control module through the first potentiometer, the anode of the first diode is connected to the anode of the third diode and the cathode of the second diode, and the anode of the second diode is connected to the anode of the second capacitor.

4. The safe power supply circuit of a power amplifier power board according to claim 3, characterized in that: The positive electrode control module includes a first voltage stabilizer, a fourth resistor, a third resistor, a fifth resistor, a seventh resistor, an eighth resistor, a first power tube, a fourth diode and a third capacitor; The IN end of the first voltage regulator is connected to the slider end of the first potentiometer, the OUT end of the first voltage regulator is connected to the anode of the third diode, one end of the third capacitor, one end of the fourth resistor, one end of the fifth resistor and the cathode of the second diode, and is connected to the ADJ end of the first voltage regulator, one end of the third resistor and the cathode of the fourth diode through the eighth resistor, the other end of the third resistor is connected to the anode of the second diode, the other end of the fourth resistor is connected to the drain of the first power tube, the source of the first power tube is connected to the other end of the fifth resistor, the IO2 end of the first controller and the anode of the fourth diode, and is connected to the other end of the third capacitor and the ground through the seventh resistor, and the gate of the first power tube is connected to the IO3 end of the first controller.

5. The safe power supply circuit of a power amplifier power board according to claim 4, characterized in that: The second input module includes a second resistor, a fourth capacitor, a third switch tube, a fourth switch tube, a second potentiometer, a seventh thyristor, a tenth thyristor, a ninth thyristor and a fifth capacitor; One end of the second resistor is connected to the cathode of the sixth thyristor, the collector of the third switch tube, the collector of the fourth switch tube and the anode of the seventh thyristor, and is connected to one end of the fifth capacitor and the ground through the fourth capacitor. The other end of the second resistor is connected to the base of the third switch tube and the anode of the tenth thyristor, the emitter of the third switch tube is connected to the base of the fourth switch tube, the emitter of the fourth switch tube is connected to one end of the second potentiometer, the other end of the second potentiometer and the slider end are both connected to the voltage stabilizing control module, the cathode of the seventh thyristor is connected to the cathode of the tenth thyristor and the anode of the ninth thyristor, the cathode of the ninth thyristor is connected to the other end of the fifth capacitor, and the control end of the ninth thyristor is connected to the control end of the tenth thyristor, the control end of the seventh thyristor and the second end of the sixth resistor.

6. The safe power supply circuit of a power amplifier power board according to claim 5, characterized in that: The voltage stabilization control module includes a second voltage stabilizer, a ninth resistor, a tenth resistor, an eighth thyristor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a second power tube and a sixth capacitor; The IN end of the second voltage regulator is connected to the slider end of the second potentiometer, the OUT end of the second voltage regulator is connected to one end of the sixth capacitor, one end of the tenth resistor and one end of the eleventh resistor and is connected to the drain of the second power tube through the thirteenth resistor, the source of the second power tube is connected to the other end of the eleventh resistor, the IO5 end of the first controller and the cathode of the eighth thyristor and is connected to the other end of the sixth capacitor and the ground through the twelfth resistor, the anode of the eighth thyristor is connected to the other end of the tenth resistor and the ADJ end of the first voltage regulator and is connected to the cathode of the ninth thyristor through the ninth resistor, the control end of the eighth thyristor is connected to the second end of the sixth resistor, and the gate of the second power tube is connected to the IO4 end of the first controller.

7. The safe power supply circuit of a power amplifier power board according to claim 6, characterized in that: The polarity switching module includes a fourth thyristor, a third thyristor, a fifth switch tube, a fifth thyristor and a second thyristor; The cathode of the third thyristor is connected to the anode of the fourth thyristor and the anode of the ninth thyristor, the cathode of the fourth thyristor is connected to the cathode of the tenth thyristor, the anode of the third thyristor is connected to the cathode of the ninth thyristor, the cathode of the second thyristor is connected to the anode of the eighth thyristor, the anode of the second thyristor is connected to the cathode of the eighth thyristor, the cathode of the fifth thyristor is connected to the anode of the seventh thyristor, the anode of the fifth thyristor is connected to the cathode of the seventh thyristor, the control end of the fifth thyristor is connected to the control end of the third thyristor, the control end of the fourth thyristor, the control end of the second thyristor, the base of the fifth switch tube and the IO1 end of the first controller, the emitter of the fifth switch tube is grounded, and the collector of the fifth switch tube is connected to the second end of the sixth resistor.

8. The safe power supply circuit of a power amplifier power board according to claim 7, characterized in that: The output control module includes a first relay, a first relay switch, a second relay, a second relay switch, a third power tube and a fourth power tube; the power amplifier board module includes a power amplifier board power port; The moving end of the first relay switch and the moving end of the second relay switch are respectively connected to the OUT end of the first voltage stabilizer and the OUT end of the second voltage stabilizer, the static end of the first relay switch is connected to the drain of the third power tube and the first end of the power interface of the power amplifier board, the source of the third power tube is connected to the source of the fourth power tube, the drain of the fourth power tube is connected to the static end of the second relay switch and the second end of the power interface of the power amplifier board, the control end of the first relay and the control end of the second relay are respectively connected to the IO7 end and IO6 end of the first controller, and the gate of the third power tube and the gate of the fourth power tube are respectively connected to the IO8 end and IO9 end of the first controller.

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