Direct-current power supply system of multi-beam solid-state transmitter

Abstract

The invention relates to a construction method of a direct-current power supply system of a multi-beam solid-state transmitter. The direct-current power supply system comprises a proportional converter part, a voltage-stabilized source circuit part, a state acquisition circuit part and a transmitting controller part. The proportional converter circuit converts input direct-current voltage into intermediate voltage and sends the intermediate voltage to the stabilized power supply circuit, and the state acquisition circuit acquires input power and current of the proportional converter circuit and output voltage and current of the stabilized power supply circuit, acquires temperature of power devices of the proportional converter circuit and the stabilized power supply circuit and performs networking through a CAN bus. Collected signals are sent to the emission control circuit, and the emission control circuit processes the collected signals, sends the processed signals to the master control circuit and controls a power input switch of the proportional converter circuit at the same time. The direct-current power supply of the multi-beam solid-state transmitter has the characteristics of wide input voltage range, high efficiency, high reliability and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply design, and in particular relates to a direct current power supply system for a multi-beam solid-state transmitter. Background Art

[0002] The multi-beam solid-state transmitter is an important component of the multi-beam system and is also the system unit with the highest power consumption. The DC power supply of the multi-beam solid-state transmitter often focuses on the power supply topology design, and generally adopts a primary isolation power supply solution. For different usage environments, designers often integrate one or more of the protection circuit, filter circuit, and lightning protection circuit into the power supply design in the form of standard circuits.

[0003] There are two problems with this combination of standard circuits: one is the redundancy of power supply design. The circuit combination often cannot obtain the most optimized circuit design, thus affecting the miniaturization of the circuit; the other is that the design of the primary isolation power supply will change significantly with the power supply demand, increasing the difficulty of R&D and design. Summary of the invention

[0004] The purpose of the present invention is to provide a DC power supply system for a multi-beam solid-state transmitter, which converts the input voltage ratio into a low-voltage DC voltage through a proportional converter circuit, realizes soft switching, and can meet a wide input voltage range. A voltage-stabilizing power supply circuit is cascaded in the back stage, and multi-channel synchronous step-down interleaving is adopted to provide the power density of the power supply. The state acquisition circuit collects voltage, current and temperature signals and summarizes them to the transmission controller through the CAN bus. The transmission controller analyzes the signal, controls the input voltage, and uploads it to the main control, thereby improving the reliability and maintainability of the whole machine.

[0005] The technical solution for achieving the purpose of the present invention is: a DC power supply system for a multi-beam solid-state transmitter, comprising a plurality of integrated modules and a transmission control circuit, each integrated module is used to supply power to a solid-state power amplifier in a one-to-one correspondence, each integrated module comprises a proportional converter circuit, a voltage-stabilized power supply circuit, a state acquisition circuit, and a filter circuit, the proportional converter circuit is used to convert an input DC voltage into an intermediate voltage, the voltage-stabilized power supply circuit is used to perform secondary voltage stabilization on the intermediate voltage output by the proportional converter circuit, and the filter circuit is used to filter out input noise of the solid-state power amplifier;

[0006] The state acquisition circuit is used to collect the input power and current of the proportional converter circuit, the output voltage and current of the voltage-stabilized power supply circuit, and the temperature of the power devices in the proportional converter circuit and the voltage-stabilized power supply circuit and send the collected signal to the emission control circuit. The emission control circuit is used to control the power input switch of the proportional converter circuit according to the collected signal.

[0007] Preferably, the state acquisition circuit aggregates the acquired input power and current of the proportional converter circuit, the output voltage and current of the voltage-stabilized power supply circuit, and the temperature of the power devices in the proportional converter circuit and the voltage-stabilized power supply circuit to the emission control circuit via the CAN bus.

[0008] Preferably, the proportional converter circuit adopts a two-switch half-bridge resonant topology, including: a transistor 11, a crystal 12, a crystal 17, a crystal 18, a capacitor 13, a capacitor 14, a capacitor 15 and a transformer 16, the source of the transistor 11, the drain of the transistor 12 and one end of the capacitor 13 are connected, the drain of the transistor 11 is connected to the positive electrode of the input power supply, the source of the transistor 12 is connected to the negative electrode of the input power supply, the capacitor 14 and the capacitor 15 are connected in series, and the two ends of the series connection are respectively connected to the positive electrode of the input power supply and the negative electrode of the input power supply, one end of the primary of the transformer 16 is connected to the other end of the capacitor 13, and the other end of the primary of the transformer 16 is connected to the connection end of the capacitor 14 and the capacitor 15, one end of the secondary of the transformer 16 is connected to the drain of the transistor 17, and the other end is connected to the drain of the transistor 18, the center tap is connected to the positive output port, and the source of the transistor 17 and the source of the transistor 18 are connected to the negative output port.

[0009] Preferably, the switching frequency and pulse width of the proportional converter circuit are constant. When transistor 11 is turned on, transistor 12 is turned off, capacitor 13, capacitor 15 and the primary leakage inductance of transformer 16 resonate with a resonant frequency fr1. When transistor 11 is turned off, transistor 12 is turned on, capacitor 13, capacitor 14 and the primary leakage inductance of transformer 16 resonate with a resonant frequency fr2. The converter switching frequency is equal to the resonant frequencies fr1 and fr2. Half a cycle of resonance is completed before the full-bridge switch dead zone, and the bridge arm current returns to zero through resonance before turning on.

[0010] Preferably, the voltage-stabilized power supply circuit is a multi-path staggered synchronous step-down circuit, comprising three groups of step-down modules connected in parallel, each group of step-down modules comprising a first transistor, a second transistor, a resistor, an inductor and a capacitor, the drain of the first transistor being connected to the positive output port of the proportional converter circuit 1, the source of the first transistor being connected to the drain of the second transistor, the source of the second transistor being connected to the negative output port of the proportional converter circuit 1, one end of the inductor being connected to the source of the first transistor, the other end of the inductor being connected to one end of the resistor, the other end of the resistor being connected to one end of the capacitor, and the other end of the capacitor being connected to the source of the second transistor.

[0011] Preferably, the state acquisition circuit includes an isolated current sampling chip 41, an isolated voltage sampling chip 42, a high-side current sampling chip 43, a negative temperature coefficient thermistor 44, a negative temperature coefficient thermistor 45, and a single-chip microcomputer 46. The isolated current sampling chip 41 samples the input current of the proportional converter, and the isolated voltage sampling chip 42 samples the input voltage of the proportional converter, and sends it to the single-chip microcomputer through an analog-to-digital converter. The high-side current sampling chip 43 samples the positive output current of the regulated power supply, samples the output voltage of the regulated power supply through resistor voltage division and operational amplifier filtering, and sends it to the single-chip microcomputer through the analog-to-digital converter; the negative temperature coefficient thermistor 44 and the negative temperature coefficient thermistor 45 are filtered by resistor voltage division and operational amplifier, and sent to the single-chip microcomputer 46 through the analog-to-digital converter. The single-chip microcomputer 46 summarizes the sampling information and sends the information to the transmission control circuit.

[0012] Compared with the prior art, the present invention has the following significant advantages:

[0013] 1. Wide input voltage range: The proportional converter circuit of the present invention can adjust the fixed proportional value according to the actual input requirements to adapt to the wide range of input voltage requirements;

[0014] 2. When the proportional converter circuit works in a high-frequency resonant state, the conduction period of the switching transistor is a half-cycle of the resonant conversion. The voltage returns to zero at the moment of switching state switching, realizing the soft switching of the switching transistor;

[0015] 3. High power and low ripple: The voltage-stabilized power supply circuit is a multi-channel synchronous buck interleaving, which reduces the output ripple and provides power density;

[0016] 4. High reliability and maintainability: The status acquisition circuit collects the input voltage, input current, output voltage, output current and temperature near the power device of each integrated module, and makes judgments and processes according to the actual collected signals, thus improving the reliability and maintainability of the equipment.

[0017] Figures and Description

[0018] Figure 1 The present invention is a block diagram of the principle of direct current power supply for a multi-beam solid-state transmitter.

[0019] Figure 2 It is a principle block diagram of the proportional converter circuit in the present invention.

[0020] Figure 3 It is a principle block diagram of the multi-path interleaved synchronous buck converter circuit in the present invention.

[0021] Figure 4 It is a principle block diagram of the state acquisition circuit in the present invention.

[0022] Figure 5It is a principle block diagram of the emission control circuit in the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1 As shown, the present invention provides a DC power supply system for a multi-beam solid-state transmitter, comprising:

[0025] Several integrated modules and a transmission control circuit 4, each integrated module is used to supply power to a solid-state power amplifier one by one, each integrated module includes a proportional converter circuit 1, a voltage-stabilized power supply circuit 2, a state acquisition circuit 3, and a filter circuit, wherein the proportional converter circuit 1 is used to convert the input DC voltage into an intermediate voltage, the voltage-stabilized power supply circuit 2 is used to perform secondary voltage stabilization on the intermediate voltage output by the proportional converter circuit 1, and the filter circuit is used to filter the input noise of the solid-state power amplifier. The solid-state power amplifier uses a semiconductor power amplifier to amplify the power of the RF signal. Multiple solid-state power amplifiers are often used to form an array for power synthesis to achieve high-power RF amplification. The DC power supply system supplies power to the array of solid-state power amplifiers.

[0026] The state acquisition circuit 3 is used to collect the input power and current of the proportional converter circuit 1, the output voltage and current of the voltage-stabilized power supply circuit 2, and the temperature of the power devices in the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2, and send the collected signal to the emission control circuit 4, and the emission control circuit 4 is used to control the power input switch of the proportional converter circuit 1 according to the collected signal. The state acquisition circuit 3 samples the input voltage of the proportional converter circuit 1 with an isolated voltage sampling chip, and samples the input current with an isolated current sampling chip; the state acquisition circuit 3 uses a resistor voltage divider to sample the output voltage of the voltage-stabilized power supply circuit 2, and samples the voltage signal after filtering through an operational amplifier, and the output current is connected in series with a high-power milliohm sampling resistor in the positive line of the output power supply, and the voltage signal at both ends of the sampling resistor is sampled after passing through a high-voltage differential operational amplifier; the state acquisition circuit 3 places a negative temperature coefficient thermistor near the power devices in the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2, and samples the voltage signal after filtering through an operational amplifier by connecting a series resistor voltage divider.

[0027] like Figure 2As shown, the proportional converter circuit 1 of the present invention adopts a two-switch half-bridge resonant topology, including transistors 11, 12, 17, 18, capacitors 13, 14, 15, and a transformer 16. The source of the transistor 11, the drain of the transistor 12 and one end of the capacitor 13 are connected, the drain of the transistor 11 is connected to the positive electrode of the input power supply, the source of the transistor 12 is connected to the negative electrode of the input power supply, the capacitor 14 and the capacitor 15 are connected in series, and the two ends of the series connection are respectively connected to the positive electrode of the input power supply and the negative electrode of the input power supply, the primary end of the transformer 16 is connected to the other end of the capacitor 13, the other end of the primary end of the transformer 16 is connected to the connection end of the capacitor 14 and the capacitor 15, one end of the secondary of the transformer 16 is connected to the drain of the transistor 17, and the other end is connected to the drain of the transistor 18, the center tap is connected to the positive output port, and the source of the transistor 17 and the source of the transistor 18 are connected to the negative output port.

[0028] The switching frequency and pulse width of the proportional converter circuit 1 are constant. When the transistor 11 is turned on, the transistor 12 is turned off, and the capacitors 13, 15 and the primary leakage inductance of the transformer 16 resonate at a resonant frequency fr1. When the transistor 11 is turned off, the transistor 12 is turned on, and the capacitors 13, 14 and the primary leakage inductance of the transformer 16 resonate at a resonant frequency fr2. The converter switching frequency is equal to the resonant frequencies fr1 and fr2. The resonance of half a cycle is completed before the dead zone of the full-bridge switch. Before the conduction, the bridge arm current returns to zero through resonance, that is, the transistor 11 and the transistor 12 are both turned on at zero current, realizing soft switching. The rectifier circuit adopts synchronous rectification, and the transistors 17 and 18 are turned on alternately. The capacitor 19 is an output capacitor used for circuit output filtering.

[0029] like Figure 3 As shown, the voltage-stabilized power supply circuit 2 of the present invention is a multi-path staggered synchronous step-down circuit, including three groups of step-down modules connected in parallel, each group of step-down modules including a first transistor, a second transistor, a resistor, an inductor and a capacitor, the drain of the first transistor is connected to the positive output port of the proportional converter circuit 1, the source of the first transistor is connected to the drain of the second transistor, the source of the second transistor is connected to the negative output port of the proportional converter circuit 1, one end of the inductor is connected to the source of the first transistor, the other end of the inductor is connected to one end of the resistor, the other end of the resistor is connected to one end of the capacitor, and the other end of the capacitor is connected to the source of the second transistor.

[0030] Specifically, the voltage-stabilized power supply circuit 2 includes transistors 21, 22, 23, 24, 25, 26, and resistors 27, 28, and 29. Transistors 21 and 22 are the first group, transistors 23 and 24 are the second group, and transistors 25 and 26 are the third group. Each group of transistors is staggered, wherein the gate pulse phase difference of transistors 21, 23, and 25 is 120°, and resistors 27, 28, and 29 are high-power milliohm sampling resistors. The controller obtains each group of synchronous buck output current by sampling the voltage at the terminals of the sampling resistors 27, 28, and 29. When the three-way output current is unbalanced, the controller preferentially reduces the pulse width of the synchronous buck circuit of the group with the larger output current, so that the output current of the multi-way staggered buck circuit is balanced.

[0031] like Figure 4 As shown, the state acquisition circuit 3 of the present invention includes: an isolated current sampling chip 41, an isolated voltage sampling chip 42, a high-side current sampling chip 43, negative temperature coefficient thermistors 44, 45, and a single-chip microcomputer 46. The isolated current sampling chip 41 takes NSI1300D05-DSWVR as an example, the isolated voltage sampling chip 42 takes NSI1311-Q1SWVR as an example, and the high-side current sampling chip 43 takes INA290A2IDCKT as an example. The isolated current sampling chip 41 samples the input current of the proportional converter, and the isolated voltage sampling chip 42 samples the input voltage of the proportional converter, and sends it to the single-chip microcomputer through an analog-to-digital converter. The high-side current sampling chip 43 samples the positive output current of the regulated power supply, samples the output voltage of the regulated power supply through a resistor voltage divider and an operational amplifier filter, and sends it to the single-chip microcomputer through an analog-to-digital converter. The negative temperature coefficient thermistors 44, 45 are sent to the single-chip microcomputer 46 through a resistor voltage divider and an operational amplifier filter through an analog-to-digital converter. The single chip microcomputer 46 summarizes the sampled information and sends the information to the emission control circuit 4 through the CAN communication interface.

[0032] like Figure 5 As shown, the emission control circuit 4 of the present invention includes: a photocoupler 51, a power transistor 52, and a controller single chip 53. The controller single chip 53 is connected to the primary of the photocoupler 51, the secondary of the photocoupler 51 is connected to the gate of the power transistor 52, and the source of the power transistor 52 is connected in series with the input of the proportional converter. The emission control circuit 4 controls the power transistor 52 by controlling the primary of the photocoupler 51, thereby controlling the input power of the proportional converter.

[0033] The controller microcontroller 53 collects the integrated module information through the CAN bus, analyzes the information and compares it with the threshold, and controls the gate voltage of the power transistor 52 by controlling the photocoupler 51 to achieve the control of the input power of the proportional converter. The controller microcontroller 53 sends the current status information to the main control through the 422 serial bus or network cable.

[0034] In a further embodiment, the specific method of the emission control circuit 4 controlling the power input switch of the proportional converter circuit 1 according to the collected signal is:

[0035] The temperatures of the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2 are compared with the set threshold values, respectively. If any temperature exceeds the threshold value, the inputs of the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2 are shut down at the same time. Under normal temperature conditions, the input current and output current of the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2 are compared with the set threshold values, respectively. If any current exceeds the threshold value, the inputs of the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2 are shut down at the same time. Finally, the input voltage and output voltage of the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2 are compared with the set threshold values, respectively. If any voltage exceeds the threshold value, the inputs of the proportional converter circuit 1 and the voltage-stabilized power supply circuit 2 are shut down at the same time.

[0036] The DC power supply system of the multi-beam solid-state transmitter of the present invention completes the isolation and adjustment of the input voltage through the cascade of the proportional converter circuit and the voltage-stabilized power supply circuit. The proportional converter circuit is open-loop and works in a high-frequency resonance state, which reduces the complexity of the circuit and improves the reliability and efficiency. The voltage-stabilized power supply circuit realizes low output ripple and high power through a multi-path synchronous buck interleaving design. The state acquisition circuit acquires the input voltage, current, output voltage, current, and temperature, and can locate the fault signal, thereby improving the maintainability. The transmitting controller compares the acquired signal with the reference, controls the switch of the input voltage, and increases the reliability. The multi-beam solid-state transmitter has the characteristics of wide input voltage range, high efficiency, high reliability, etc.

Claims

1. A DC power supply system for a multi-beam solid-state transmitter, characterized in that: The invention comprises a plurality of integrated modules and a transmission control circuit (4), each integrated module being used to supply power to a solid-state power amplifier in a one-to-one manner, each integrated module comprising a proportional converter circuit (1), a voltage-stabilizing power supply circuit (2), a state acquisition circuit (3), and a filter circuit, the proportional converter circuit (1) being used to convert an input direct current voltage into an intermediate voltage, the voltage-stabilizing power supply circuit (2) being used to perform secondary voltage stabilization on the intermediate voltage output by the proportional converter circuit (1), and the filter circuit being used to filter out input noise of the solid-state power amplifier; The state acquisition circuit (3) is used to acquire the input power and current of the proportional converter circuit (1), the output voltage and current of the voltage-stabilized power supply circuit (2), and the temperature of the power devices in the proportional converter circuit (1) and the voltage-stabilized power supply circuit (2), and to send the acquired signals to the emission control circuit (4). The emission control circuit (4) is used to control the power input switch of the proportional converter circuit (1) according to the acquired signals.

2. The DC power supply system of the multi-beam solid-state transmitter according to claim 1, characterized in that: The state acquisition circuit (3) collects the input power and current of the proportional converter circuit (1), the output voltage and current of the voltage-stabilized power supply circuit (2), and the temperatures of the power devices in the proportional converter circuit (1) and the voltage-stabilized power supply circuit (2) to the emission control circuit (4) via the CAN bus.

3. The DC power supply system of the multi-beam solid-state transmitter according to claim 1, characterized in that: The proportional converter circuit (1) adopts a two-switch half-bridge resonant topology, comprising: a transistor 11, a crystal 12, a crystal 17, a crystal 18, a capacitor 13, a capacitor 14, a capacitor 15 and a transformer 16, wherein the source of the transistor 11, the drain of the transistor 12 and one end of the capacitor 13 are connected, the drain of the transistor 11 is connected to the positive electrode of the input power supply, the source of the transistor 12 is connected to the negative electrode of the input power supply, the capacitor 14 and the capacitor 15 are connected in series, and the two ends of the series connection are respectively connected to the positive electrode of the input power supply and the negative electrode of the input power supply, one end of the primary of the transformer 16 is connected to the other end of the capacitor 13, the other end of the primary of the transformer 16 is connected to the connection end of the capacitor 14 and the capacitor 15, one end of the secondary of the transformer 16 is connected to the drain of the transistor 17, and the other end is connected to the drain of the transistor 18, the center tap is connected to the positive output port, and the source of the transistor 17 and the source of the transistor 18 are connected to the negative output port.

4. The DC power supply system of the multi-beam solid-state transmitter according to claim 3, characterized in that: The switching frequency and pulse width of the proportional converter circuit (1) are constant. When the transistor 11 is turned on, the transistor 12 is turned off, and the capacitors 13, 15 and the primary leakage inductance of the transformer 16 resonate at a resonance frequency of fr1. When the transistor 11 is turned off, the transistor 12 is turned on, and the capacitors 13, 14 and the primary leakage inductance of the transformer 16 resonate at a resonance frequency of fr2. The converter switching frequency is equal to the resonance frequencies fr1 and fr2. Half a cycle of resonance is completed before the full-bridge switch dead zone. Before the switch is turned on, the bridge arm current returns to zero through resonance.

5. The DC power supply system of the multi-beam solid-state transmitter according to claim 1, characterized in that: The voltage-stabilized power supply circuit (2) is a multi-path staggered synchronous step-down circuit, comprising three groups of step-down modules connected in parallel, each group of step-down modules comprising a first transistor, a second transistor, a resistor, an inductor and a capacitor, the drain of the first transistor being connected to the positive output port of the proportional converter circuit 1, the source of the first transistor being connected to the drain of the second transistor, the source of the second transistor being connected to the negative output port of the proportional converter circuit 1, one end of the inductor being connected to the source of the first transistor, the other end of the inductor being connected to one end of the resistor, the other end of the resistor being connected to one end of the capacitor, and the other end of the capacitor being connected to the source of the second transistor.

6. The DC power supply system of the multi-beam solid-state transmitter according to claim 1, characterized in that: The state acquisition circuit (3) comprises an isolated current sampling chip 41, an isolated voltage sampling chip 42, a high-side current sampling chip 43, a negative temperature coefficient thermistor 44, a negative temperature coefficient thermistor 45, and a single-chip computer 46. The isolated current sampling chip 41 samples the input current of the proportional converter, the isolated voltage sampling chip 42 samples the input voltage of the proportional converter, and sends the samples to the single-chip computer through an analog-to-digital converter. The high-side current sampling chip 43 samples the positive output current of the regulated power supply, samples the output voltage of the regulated power supply through resistor voltage division and operational amplifier filtering, and sends the samples to the single-chip computer through the analog-to-digital converter. The negative temperature coefficient thermistor 44 and the negative temperature coefficient thermistor 45 are filtered through resistor voltage division and operational amplifier filtering, and sent to the single-chip computer 46 through the analog-to-digital converter. The single-chip computer 46 summarizes the sampled information and sends the information to the emission control circuit (4).

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