CN109687694B - Multi-power supply integrated assembly and control method thereof - Google Patents
Multi-power supply integrated assembly and control method thereof Download PDFInfo
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- CN109687694B CN109687694B CN201910053461.8A CN201910053461A CN109687694B CN 109687694 B CN109687694 B CN 109687694B CN 201910053461 A CN201910053461 A CN 201910053461A CN 109687694 B CN109687694 B CN 109687694B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
Abstract
The invention discloses a multi-path power supply integrated assembly which at least comprises a control unit circuit, a bidirectional alternating current voltage regulating circuit, a bidirectional high-frequency resonance circuit, a bidirectional rectification inversion voltage regulating circuit, a rectification voltage reducing circuit, an alternating current voltage stabilizing control circuit, a frequency tracking control circuit, a first direct current voltage stabilizing control circuit and a second direct current voltage stabilizing control circuit, wherein the bidirectional alternating current voltage regulating circuit, the bidirectional high-frequency resonance circuit, the bidirectional rectification inversion voltage regulating circuit, the rectification voltage reducing circuit, the alternating current voltage stabilizing control circuit; the alternating current voltage stabilization control circuit and the bidirectional alternating current voltage regulation circuit form bidirectional electric connection; the frequency tracking control circuit and the bidirectional high-frequency resonance circuit form bidirectional electric connection; the first direct current voltage stabilization control circuit is in bidirectional electric connection with the bidirectional rectification inversion voltage regulation circuit; the second direct current voltage stabilization control circuit and the rectification voltage reduction circuit form one-way electric connection. The invention has the following advantages and effects: the power supply can be simultaneously used for alternating current, direct current, wired and wireless power supplies, the output port is stable in voltage and frequency and free of harmonic waves, and the power supply has the advantages of low cost, small size and convenience in carrying.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to a multi-path power supply integrated assembly and a control method thereof.
Background
In the prior art, input ports of an alternating current power supply input device and a direct current power supply input device are fixed and cannot be exchanged with each other, the direct current power supply input device cannot be used in occasions where only an alternating current power supply can be provided, and the alternating current power supply input device cannot be used in occasions where only a direct current power supply can be provided, so that inconvenience is brought to a user.
The increasing variety and use of portable terminal products have increased the demand for portable charger power supplies. The conventional portable charging power supply is mainly realized by two power supplies for wired charging and wireless charging, and one charging power supply cannot meet the requirements of wired charging and wireless charging at the same time.
A typical AC power input device mainly includes an AC/DC and DC/DC converter, an inverter, a system control circuit, and the like, and a typical DC power input device mainly includes a DC/DC and DC/AC converter, a system control circuit, and the like. If all parts of the power supply apparatus are separately designed, it results in an increase in cost and volume of the power supply apparatus. The existing device mainly integrates an AC/DC converter and a DC/DC converter, and the requirements on the cost and the volume of a power supply device are difficult to meet.
In the existing multi-path power supply device, the voltage and the electric energy quality of an output end are often changed along with the input voltage and a terminal load, the voltage of an output end has the defects of fluctuation, harmonic wave, detuning and the like, and an input end and an output end of the power supply device cannot be interchanged in the using process.
Disclosure of Invention
Aiming at the defects and shortcomings in the background technology, the invention provides a multi-path power supply integrated assembly and a control method thereof, which can be used for alternating current, direct current, wired and wireless power supplies simultaneously, and has the advantages of voltage stabilization, frequency stabilization and no harmonic wave at an output port, low cost, small volume and portability.
In order to achieve the above object, the present invention provides a multi-channel power supply integrated assembly, which at least comprises a control unit circuit, and a bidirectional ac voltage regulating circuit, a bidirectional high frequency resonant circuit, a bidirectional rectification inversion voltage regulating circuit, a rectification voltage reducing circuit, an ac voltage stabilizing control circuit, a frequency tracking control circuit, a first dc voltage stabilizing control circuit and a second dc voltage stabilizing control circuit which are electrically connected with the control unit circuit; the bidirectional alternating current voltage regulating circuit, the bidirectional high-frequency resonance circuit, the bidirectional rectification inversion voltage regulating circuit and the rectification voltage reducing circuit are all electrically connected with the same alternating current bus; the alternating current voltage stabilizing control circuit and the bidirectional alternating current voltage regulating circuit form bidirectional electric connection and control the bidirectional alternating current voltage regulating circuit to realize bidirectional conversion with adjustable alternating current voltage and frequency; the frequency tracking control circuit and the bidirectional high-frequency resonance circuit form bidirectional electric connection and control the bidirectional high-frequency resonance circuit to form high-frequency wireless charging voltage or receive high-frequency wireless discharging voltage; the first direct current voltage stabilizing control circuit and the bidirectional rectification inversion voltage regulating circuit form bidirectional electric connection and control the bidirectional rectification inversion voltage regulating circuit to realize the alternating current/direct current rectification inversion function with adjustable size and frequency; the second direct current voltage stabilization control circuit and the rectification voltage reduction circuit form one-way electric connection and are used for providing stable 5V direct current voltage.
Further setting the following steps: the bidirectional alternating current voltage regulating circuit comprises an input filter circuit a, a bridge rectifier circuit, a direct current chopper circuit, a bridge inverter circuit and an output filter circuit a which are sequentially connected, wherein the bridge rectifier circuit and the bridge inverter circuit are respectively provided with four controllable switching devices, and each controllable switching device is connected with a reverse diode in parallel; the direct current chopper circuit is composed of a controllable switching device and an energy storage inductor; the input filter circuit a and the output filter circuit a are both composed of filter inductors and filter capacitors; the bidirectional high-frequency resonance circuit comprises a bridge rectifier circuit, a high-frequency inverter circuit, a resonance network and a coil which are connected in sequence, wherein the resonance network is an LCC resonance structure consisting of two filter capacitors and a filter inductor, and the coil is electrified to generate a high-frequency coupling magnetic field; the bidirectional rectification inversion voltage regulating circuit comprises an input filter circuit b, a bridge type bidirectional AC/DC conversion circuit and an output filter circuit b which are sequentially connected, wherein the input filter circuit b and the output filter circuit b are respectively composed of an energy storage inductor and a filter capacitor, and the bridge type bidirectional AC/DC conversion circuit is composed of four full-control switch devices and reverse diodes connected with each full-control switch device in parallel.
Further setting the following steps: the alternating current voltage stabilization control circuit at least comprises a PID regulator and a PWM generator; the frequency tracking control circuit at least comprises a sampling resistor, an amplifying circuit and a phase inverter; the first direct current voltage stabilization control circuit at least comprises a current PI controller and a voltage PI controller.
The invention also provides a control method of the multi-path power supply integrated assembly, which comprises the following steps:
s1, according to the difference of the voltage accessed to the multi-path power supply integrated assembly, four working modes are provided, when the accessed voltage is the commercial power, the working modes are switched to be the working modes, and the working modes jump to the step S2;
when the access voltage is the alternating current different from the commercial power, switching to the second working mode and jumping to the step S3;
when the access voltage is direct current, switching to the third working mode and jumping to the step S4;
when the alternating current with the high-frequency voltage is switched in, switching to the fourth working mode and jumping to the step S5;
s2, first working mode: the alternating current voltage regulating circuit is connected with the alternating current bus, and alternating current voltage output with adjustable size is obtained through the bidirectional alternating current voltage regulating circuit and the alternating current voltage stabilizing control circuit; the direct-current voltage output with adjustable size is obtained through the bidirectional rectification inversion voltage regulating circuit and the first direct-current voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit; obtaining high-frequency alternating current output with adjustable size and frequency through a bidirectional high-frequency resonance circuit and a frequency tracking control circuit; then go to step S6;
s3, second working mode: the access voltage is connected with the alternating current voltage stabilization control circuit, the commercial power value is taken as the set value, and the commercial power is obtained on the alternating current bus through the bidirectional alternating current voltage regulation circuit and the alternating current voltage stabilization control circuit; then, a direct current voltage output with adjustable size is obtained through the bidirectional rectification inversion voltage regulating circuit and the first direct current voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit; obtaining high-frequency alternating current output with adjustable size and frequency through a bidirectional high-frequency resonance circuit and a frequency tracking control circuit; then go to step S6;
s4, operation mode three: the access voltage is connected with a first direct current voltage stabilization control circuit, the set value is the commercial power value, and commercial power is obtained on the alternating current bus through a bidirectional rectification inversion voltage regulation circuit and the first direct current voltage stabilization control circuit; then, the alternating voltage output with adjustable magnitude is obtained through the bidirectional alternating voltage regulating circuit and the alternating voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit; obtaining high-frequency alternating current output with adjustable size and frequency through a bidirectional high-frequency resonance circuit and a frequency tracking control circuit; then go to step S6;
s5, working mode four: the voltage is connected with the frequency tracking control circuit, the commercial power value is taken as the set value, and the commercial power is obtained on the alternating current bus through the bidirectional high-frequency resonance circuit and the frequency tracking control circuit; then, the alternating voltage output with adjustable magnitude is obtained through the bidirectional alternating voltage regulating circuit and the alternating voltage stabilizing control circuit; the direct-current voltage output with adjustable size is obtained through the bidirectional rectification inversion voltage regulating circuit and the first direct-current voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit;
and S6, the multi-path power supply integration assembly keeps working until the input voltage changes, and then the operation returns to the step S1.
Further setting the following steps: the control method of the alternating current voltage stabilization control circuit specifically comprises the following steps: a fuzzy RBF neural network PID voltage stabilization control strategy is adopted, the voltage deviation e and the deviation change rate ec of the collected bridge inverter circuit output voltage and the specified voltage are used as a fuzzy RBF neural network, three parameters Kp, Ki and Kd of a PID regulator are output, a PWM generator generates PWM pulse signals by combining the voltage deviation e and the deviation change rate ec through the PID regulator, and the on-off of controllable switching devices in a bridge rectifier circuit, a direct current chopper circuit and the bridge inverter circuit is driven and controlled to obtain the required output alternating current voltage.
Further setting the following steps: the control method of the frequency tracking control circuit specifically comprises the following steps: the frequency tracking and automatic frequency modulation control strategy based on the phase-locked loop is adopted, a current signal of a transmitting end of the bidirectional high-frequency resonance circuit is collected through a sampling resistor, a voltage signal with the same frequency and phase as the current of the bidirectional high-frequency resonance circuit is obtained through an amplifying circuit, a voltage signal with the same frequency and phase as the voltage of the bidirectional high-frequency resonance circuit is obtained through phase compensation and a phase inverter, a driving signal determined by the phase difference between the two voltage signals is obtained through the phase-locked loop, the on-off frequency of a switching tube in the high-frequency inverter circuit is adjusted until the phase difference between the voltage and the current of the bidirectional high-frequency resonance circuit is zero, the transmitting end circuit is in a complete series resonance state, and the automatic frequency tracking is realized.
Further setting the following steps: the control method of the first direct current voltage stabilization control circuit specifically comprises the following steps: the voltage and current double closed loop control based on the direct current control of the PI controller is adopted, namely, an outer loop controls and stabilizes direct current output voltage, an inner loop controls and stabilizes alternating current, the actual direct current voltage acquired by the voltage outer loop is compared with the set and tracked command voltage, amplitude reference can be provided for the current inner loop through the PI controller, the amplitude reference is multiplied by a sine signal with the same phase as the alternating current sine voltage of an alternating current side through a multiplier to obtain the command reference current of the current inner loop, the current inner loop is compared with the reference current obtained before through the actual current acquired by the alternating current side, and the control of a full-control switching tube is realized through the PI controller, so that the controlled current of the alternating current side changes according to the command reference current, and the purpose of tracking the voltage by the current is realized.
The invention has the beneficial effects that:
the alternating current and direct current output with adjustable voltage and the high-frequency alternating current output with adjustable frequency are realized. The device has the characteristics of interchangeable direct current input ports and alternating current input ports, interchangeable input ports and output ports, automatic voltage regulation along with loads, no harmonic, unit power factor, frequency tracking, voltage stabilization and frequency stabilization, and is conveniently used for wired and wireless charging and discharging devices of different alternating current and direct current power supplies and different battery packs.
The advantages of the invention are not limited to this description, but rather are described in greater detail in the detailed description for better understanding.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a circuit diagram of a bi-directional AC voltage regulator circuit of the present invention;
FIG. 3 is a circuit diagram of a bidirectional rectifying inverting voltage regulating circuit of the present invention;
FIG. 4 is a circuit diagram of a bidirectional high-frequency resonant circuit according to the present invention;
FIG. 5 is a schematic diagram of an AC voltage regulation control circuit according to the present invention;
FIG. 6 is a schematic diagram of the fuzzy RBF neural network structure of the present invention;
FIG. 7 is a schematic diagram of a frequency tracking control circuit according to the present invention;
FIG. 8 is a schematic diagram of a first DC regulator control circuit according to the present invention;
fig. 9 is a structural diagram of the multi-power supply integrated panel of the invention.
In the figure: a0, AC bus; a1, a bidirectional alternating current voltage regulating circuit; a2, a bidirectional high-frequency resonance circuit; a3, a bidirectional rectifying inverter voltage regulating circuit; a4, a rectification step-down circuit; a5, an alternating current voltage stabilization control circuit; a6, frequency tracking control circuit; a7, a first DC voltage regulation control circuit; a8, a second direct current voltage stabilization control circuit; a9, control unit circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings, as shown in fig. 1 to 9.
Example 1
As shown in fig. 1, in an embodiment of the present invention, the proposed multi-channel power supply integrated assembly at least includes a control unit circuit a9, a bidirectional ac voltage regulating circuit a1 electrically connected to the control unit circuit a9, a bidirectional high-frequency resonant circuit a2, a bidirectional rectification inversion voltage regulating circuit A3, a rectification voltage dropping circuit a4, an ac voltage stabilizing control circuit a5, a frequency tracking control circuit a6, a first dc voltage stabilizing control circuit a7, and a second dc voltage stabilizing control circuit A8;
the bidirectional alternating current voltage regulating circuit A1, the bidirectional high-frequency resonance circuit A2, the bidirectional rectifying inversion voltage regulating circuit A3 and the rectifying voltage reducing circuit A4 are all electrically connected with the same alternating current bus A0;
the alternating current voltage stabilizing control circuit A5 and the bidirectional alternating current voltage regulating circuit A1 form bidirectional electric connection, and control the bidirectional alternating current voltage regulating circuit A1 to realize bidirectional conversion with adjustable alternating current voltage and frequency;
the frequency tracking control circuit A6 is in bidirectional electric connection with the bidirectional high-frequency resonance circuit A2, and controls the bidirectional high-frequency resonance circuit A2 to form high-frequency wireless charging voltage or receive high-frequency wireless discharging voltage;
the first direct current voltage stabilization control circuit A7 and the bidirectional rectification inversion voltage regulation circuit A3 form bidirectional electric connection, and control the bidirectional rectification inversion voltage regulation circuit A3 to realize the alternating current/direct current rectification inversion function with adjustable size and frequency;
the second dc voltage regulation control circuit A8 and the rectification buck circuit a4 form a unidirectional electrical connection for providing a stable 5V dc voltage. The rectification step-down circuit a4 and the second dc stabilization control circuit A8 in this embodiment are conventional structures, and only need to step down the voltage to 5V dc in a single direction, which is a conventional technical means in the electronic field, and meanwhile, a detailed description is given in the university teaching analog circuit, and no further description is given.
Specifically, as shown in fig. 2, the bidirectional ac voltage regulating circuit a1 includes an input filter circuit a, a bridge rectifier circuit, a dc chopper circuit, a bridge inverter circuit and an output filter circuit a, which are connected in sequence, the bridge rectifier circuit and the bridge inverter circuit each have four controllable switching devices, each controllable switching device is connected in parallel with a backward diode, the control unit circuit a9 sends an SPWM driving signal to the controllable switching device to control on/off of the controllable switching device, and the on/off ratio of the driving signal SPWM is changed to control the magnitude of the rectified output voltage. The direct current chopper circuit is composed of a controllable switch device and an energy storage inductor, the output direct current voltage can be adjusted by controlling the on-off of the controllable switch device, then the sine alternating current voltage is obtained through a bridge type inverter circuit, an input filter circuit a and an output filter circuit a, and the on-off ratio of a driving signal SPWM is changed to control the size and the frequency of the alternating current voltage required by the output after inversion. The input filter circuit a and the output filter circuit a are both composed of filter inductors and filter capacitors, and a conventional LC filter structure is formed.
The SPWM control signal sent by the control circuit is utilized to respectively control the on-off of four controllable switch devices of the bridge rectifier circuit and the bridge inverter circuit, the alternating voltage obtains a sine alternating voltage without harmonic waves through input filtering, a direct current voltage with adjustable size is formed through the bridge rectifier circuit, a series of voltage signals with equal amplitude and width modulation obtained through the bridge inverter circuit can obtain the alternating voltage signal output without harmonic waves after output filtering, the reverse flow of electric energy can be realized through a control strategy and a full-control switch device, and the bidirectional conversion with adjustable alternating voltage size and frequency is realized.
Specifically, as shown in fig. 3, the bidirectional rectifying, inverting and voltage regulating circuit a3 includes an input filter circuit b, a bridge bidirectional AC/DC converting circuit and an output filter circuit b, which are connected in sequence, where the input filter circuit b and the output filter circuit b are both composed of an energy storage inductor and a filter capacitor, and the bridge bidirectional AC/DC converting circuit is composed of four fully-controlled switching devices and a reverse diode connected in parallel with each fully-controlled switching device. By controlling the on-off of the full-control switch device, when the full-control switch device is in a forward rectification state, the energy storage inductor stores energy firstly and then releases the energy, and converts input alternating current into output port direct current; when the inverter is in a reverse inversion state, the energy storage inductor stores energy firstly and then releases the energy, and the input direct current is converted into an alternating current output port by utilizing the current stabilization of the energy storage inductor, the voltage stabilization of the filter capacitor, the diode follow current and the filtering action of the energy storage inductor and the filter capacitor. The bidirectional rectifying, inverting and voltage regulating circuit A3 can realize the bidirectional rectifying and inverting function with adjustable size and frequency, and has the characteristic of wide input and output voltage range. The bridge type bidirectional AC/DC conversion circuit is a two-arm switch, control signals of the same arm switch are mutually complementary signals and have dead time so as to avoid short circuit caused by simultaneous conduction of an upper arm and a lower arm. SPWM is used as a control mode for switching the power switch, and a high-frequency switching mode is adopted to reduce the switching loss and the volume of a post-stage filtering and filtering circuit.
Specifically, as shown in fig. 4, the bidirectional high-frequency resonant circuit a2 includes a bridge rectifier circuit, a high-frequency inverter circuit, a resonant network and a coil, which are connected in sequence, the resonant network is an LCC resonant structure formed by two filter capacitors and a filter inductor, and the coil is energized to generate a high-frequency coupling magnetic field; the control unit circuit A9 adopts a PWM control integrated circuit composed of inverter voltage and current detection and frequency tracking to generate a high-frequency PWM wave signal to drive the on-off of a controllable switch device in the bidirectional high-frequency resonance circuit A2, and the control unit circuit combines a resonance network to generate a high-frequency current for a coil, and the coil generates a high-frequency coupling magnetic field to form a high-frequency wireless charging power supply for the wireless charging device. The bidirectional high-frequency resonant circuit a2 can form a wireless charging voltage of high frequency or receive a wireless discharging voltage of high frequency for wireless charging and discharging wireless reception.
Specifically, as shown in fig. 5 and 6, the ac regulator control circuit a5 includes at least a PID regulator and a PWM generator. The control method of the alternating current voltage stabilization control circuit A5 comprises the following steps: the method comprises the steps of taking a required certain output voltage value as a set value, acquiring the proportional integral derivative of the deviation between an actual output value and the set value in real time, forming a PID regulator of a controlled variable through linear combination, calculating the updated quantity of a connection weight by adopting a fuzzy neural network method, configuring and designing parameters of the PID regulator, obtaining an SPWM driving signal of a control unit circuit A9, controlling the on-off of a switching element and realizing the control of the magnitude of alternating voltage. By collecting the deviation of the output value and the set value and adopting a control strategy of combining a fuzzy neural network and a PID regulator, the SPWM is automatically adjusted, the size of the output voltage is controlled, stable alternating current output is realized, the output voltage and the input voltage have the same phase, and the power factor is approximate to 1. Specifically, the acquired voltage deviation e and the deviation change rate ec of the output voltage of the bridge inverter circuit and the designated voltage are used as a fuzzy RBF neural network, three parameters Kp, Ki and Kd of a PID regulator are output, and a PWM generator in a control unit circuit A9 generates a PWM pulse signal by combining e and ec through the PID regulator, so that the on-off of controllable switching devices in a bridge rectifier circuit, a direct current chopper circuit and the bridge inverter circuit is driven and controlled, and the required output alternating current voltage is obtained.
Wherein, the fuzzy RBF neural network structure is: consists of a traditional PID regulator and a fuzzy neural network. A traditional PID regulator is adopted to carry out closed-loop control on a control object, and 3 parameters of the PID regulator are regulated on line by a fuzzy neural network. The fuzzy neural network controls the input neuron composed of system voltage deviation e and the change rate ec of the deviation, and the output neuron composed of 3 parameters Kp, Ki and Kd of PID controller. The fuzzy RBF neural network consists of an input layer, a fuzzy inference layer and an output layer, and the control is realized by adjusting the weight and the center and the base width of the fuzzy membership function.
The Kp, Ki and Kd parameters of the PID regulator are set on line in real time by using the RBF neural network self-learning and infinite approximation capabilities, the voltage information of the real-time sampling output port is fed back and closed-loop control is completed, and the control parameters of three PID regulators which enable the system to reach certain system optimization are output through self-learning and self-adjustment of the neural network, so that automatic stable control of the alternating voltage is realized.
Specifically, as shown in fig. 7, the frequency tracking control circuit a6 includes at least a sampling resistor, an amplifying circuit, and an inverter. The frequency tracking control circuit A6 has the following control method: a frequency tracking and automatic frequency modulation control strategy based on a phase-locked loop is adopted, a current signal of a transmitting end of a bidirectional high-frequency resonance circuit A2 is collected through a sampling resistor, a voltage signal with the same frequency and phase as the current of the bidirectional high-frequency resonance circuit A2 is obtained through an amplifying circuit, a voltage signal of a bidirectional high-frequency resonance circuit A2 is subjected to phase compensation and a phase inverter to obtain a voltage signal with the same frequency and phase as the voltage of the bidirectional high-frequency resonance circuit A2, the two voltage signals are subjected to phase-locked loop to obtain a driving signal determined by the phase difference of the two voltage signals, the on-off frequency of a switching tube in a high-frequency inverter circuit is adjusted until the phase difference between the voltage and the current of the bidirectional high-frequency resonance circuit A2 is zero, and the. If the natural frequency of the resonant circuit is inconsistent with the transmitting frequency due to the change of the parameters, the adjustable capacitor of the transmitting end is adjusted according to the natural frequency of the resonant circuit of the receiving end, the driving frequency of the transmitting end is automatically adjusted, the phase difference between the voltage and the current of the resonant circuit of the transmitting end and the current of the resonant circuit of the receiving end is zero, and the transmitting circuit and the receiving circuit are in a resonant state with the same frequency, so that the frequency automatic tracking and frequency modulation control suitable for different loads is realized.
Specifically, as shown in fig. 8, the first dc regulated control circuit a7 at least includes a current PI controller and a voltage PI controller, and the control method of the first dc regulated control circuit a7 includes: the voltage and current double closed loop control based on the direct current control of the PI controller is adopted, namely, an outer loop controls and stabilizes direct current output voltage, an inner loop controls and stabilizes alternating current, the actual direct current voltage acquired by the voltage outer loop is compared with the set and tracked command voltage, amplitude reference can be provided for the current inner loop through the PI controller, the amplitude reference is multiplied by a sine signal with the same phase as the alternating current sine voltage of an alternating current side through a multiplier to obtain the command reference current of the current inner loop, the current inner loop is compared with the reference current obtained before through the actual current acquired by the alternating current side, and the control of a full-control switching tube is realized through the PI controller, so that the controlled current of the alternating current side changes according to the command reference current, and the purpose of tracking the voltage by the current is realized. The direct current control voltage and current double closed loop control PWM bidirectional rectification inverter circuit A3 based on the current PI controller and the voltage PI controller has the advantages of achieving unit power factor operation of rectification and inversion, reducing switching loss, prolonging service life, being capable of quickly obtaining stable output voltage in a rectification operation mode, obtaining good sine alternating voltage in inversion, reducing direct current side harmonic waves, improving the performance of a direct current side filter and the like.
Example 2
As shown in fig. 9, the present embodiment further provides a multi-channel power supply integrated panel, wherein the multi-channel power supply integrated assembly in embodiment 1 is soldered on the circuit board and configured in the multi-channel power supply integrated panel. The multi-channel power supply integrated panel is provided with 11 ports, wherein a port 1 is a 220V alternating voltage port, a port 2 is other different alternating voltage ports, a port 3 is different direct voltage ports, a port 4 is a high-frequency alternating voltage port, a port 5 is a USB port, a port 6 is an interface voltage frequency display window, a port 7 is an interface display change-over switch, a port 8 is an alternating current size adjusting knob (potentiometer), a port 9 is a direct current size adjusting knob (potentiometer), a port 10 is a high-frequency alternating voltage adjusting knob (potentiometer), and a port 11 is a high-frequency alternating current frequency adjusting knob (adjustable capacitor).
Example 3
In this embodiment 3, based on the multi-channel power supply integrated panel in embodiment 2, four different operating modes are provided according to voltages connected to different ports of the multi-channel power supply integrated panel; the method specifically comprises the following steps:
s1, according to the voltage connected to the multi-channel power supply integrated assembly, the multi-channel power supply integrated assembly is connected to the corresponding port of the multi-channel power supply integrated panel, and has four working modes:
the port 1 is an access port of the mains supply, and when the access voltage is the mains supply, the working mode is switched to the working mode and the step S2 is skipped;
the port 2 is an alternating current access port different from the mains supply, and when the access voltage is the alternating current different from the mains supply, the working mode is switched to the second working mode, and the step S3 is skipped;
the port 3 is a direct current access port, and when the access voltage is direct current, the operation mode is switched to the third operation mode and the operation is skipped to the step S4;
the port 4 is a high-frequency ac access port (an acceptance port for wireless charging), and when the access voltage is a high-frequency ac, the operation mode is switched to the fourth operation mode and the operation mode jumps to step S5.
S2, first working mode: the input mains supply voltage is AC bus A0 voltage, each adjusting knob on the panel is used for setting the appointed value of the output port, the control unit circuit A9 generates PWM control pulse signals according to the appointed value and the actual value of the output port, and the PWM drive signals are adjusted according to the on-off of each switch tube in the drive circuit and the corresponding control strategy until the output value of the port is equal to the set appointed value. Specifically, the port 2 obtains the alternating voltage output with adjustable size through the bidirectional alternating voltage regulating circuit A1 and the alternating voltage stabilizing control circuit A5; the port 3 obtains direct-current voltage output with adjustable size through the bidirectional rectifying, inverting and voltage regulating circuit A3 and the first direct-current voltage stabilizing control circuit A7; the port 5 obtains 5V direct-current voltage output through a rectifying voltage-reducing circuit A4 and a second direct-current voltage-stabilizing control circuit A8; setting an output alternating current size designated value at the port 10 and an output alternating current frequency designated value at the adjustable port 11, and obtaining high-frequency alternating current output with adjustable size and frequency at the port 4 through the bidirectional high-frequency resonance circuit A2 and the frequency tracking control circuit A6, wherein the high-frequency alternating current output is used as a transmitting port for wireless charging; then go to step S6;
s3, second working mode: the commercial power is obtained on an alternating current bus A0 through a bidirectional alternating current voltage regulating circuit A1 and an alternating current voltage stabilizing control circuit A5, the specified value is the commercial power value, 220V alternating current output voltage is obtained at a port 1, the structure of the alternating current bus A0 is adopted, the similar working mode I is adopted, the specified value of the output port is set through each adjusting knob on a panel, a control unit circuit A9 generates PWM control pulse signals according to the specified value and the actual value of the output port, and PWM driving signals are adjusted according to the on-off of each switching tube in a driving circuit and the corresponding control strategy until the output value of the port is equal to the set specified value. Specifically, a direct-current voltage output with adjustable size is obtained through a bidirectional rectification inversion voltage regulating circuit A3 and a first direct-current voltage stabilizing control circuit A7; 5V direct-current voltage output is obtained through a rectification voltage-reducing circuit A4 and a second direct-current voltage-stabilizing control circuit A8; high-frequency alternating current output with adjustable size and frequency is obtained through a bidirectional high-frequency resonance circuit A2 and a frequency tracking control circuit A6; the port 1 is an output port of commercial power, the port 3 is a direct current output port with adjustable size, the port 4 is a high-frequency alternating current output port (a transmitting port for wireless charging) with adjustable size and frequency, and the port 5 is a USB output port; then go to step S6;
s4, operation mode three: the commercial power is obtained on an alternating current bus A0 through a bidirectional rectifying, inverting and voltage regulating circuit A3 and a first direct current voltage stabilizing control circuit A7; due to the adoption of the structure of the alternating current bus A0, similarly to the first working mode, the appointed value of the output port is set by utilizing each adjusting knob on the panel, the control unit circuit A9 generates a PWM control pulse signal according to the appointed value and the actual value of the output port, and the PWM drive signal is adjusted according to the corresponding control strategy through the on-off of each switching tube in the drive circuit until the output value of the port is equal to the set appointed value. Specifically, alternating current voltage output with adjustable size is obtained through a bidirectional alternating current voltage regulating circuit A1 and an alternating current voltage stabilizing control circuit A5; 5V direct-current voltage output is obtained through a rectification voltage-reducing circuit A4 and a second direct-current voltage-stabilizing control circuit A8; high-frequency alternating current output with adjustable size and frequency is obtained through a bidirectional high-frequency resonance circuit A2 and a frequency tracking control circuit A6; the port 1 is an output port of commercial power, the port 2 is an alternating current output port with adjustable size, the port 4 is a high-frequency alternating current output port (a transmitting port for wireless charging) with adjustable size and frequency, and the port 5 is a USB output port. Then go to step S6;
s5, working mode four: through the bidirectional high-frequency resonant circuit A2 and the frequency tracking control circuit A6, the bidirectional high-frequency resonant circuit A2 in the port 4 obtains the maximum transmission power and the external wireless transmission power with the highest transmission efficiency, and supplies the alternating-current voltage value of the commercial power to the port 1 as the voltage of an alternating-current bus A0. The alternating voltage output with adjustable size is obtained through the bidirectional alternating voltage regulating circuit A1 and the alternating voltage stabilizing control circuit A5; the direct-current voltage output with adjustable size is obtained through the bidirectional rectifying, inverting and voltage regulating circuit A3 and the first direct-current voltage stabilizing control circuit A7; 5V direct-current voltage output is obtained through a rectification voltage-reducing circuit A4 and a second direct-current voltage-stabilizing control circuit A8; specifically, the port 1 is an output port of a mains supply, the port 2 is an alternating current output port with adjustable size, the port 3 is a direct current output port with adjustable size, and the port 5 is a USB output port.
And S6, the multi-path power supply integration assembly keeps working until the input voltage changes, and then the operation returns to the step S1.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (6)
1. A control method of a multi-path power supply integrated assembly is characterized in that: the control circuit at least comprises a control unit circuit, and a bidirectional alternating current voltage regulating circuit, a bidirectional high-frequency resonance circuit, a bidirectional rectification inversion voltage regulating circuit, a rectification voltage reducing circuit, an alternating current voltage stabilizing control circuit, a frequency tracking control circuit, a first direct current voltage stabilizing control circuit and a second direct current voltage stabilizing control circuit which are electrically connected with the control unit circuit;
the bidirectional alternating current voltage regulating circuit, the bidirectional high-frequency resonance circuit, the bidirectional rectification inversion voltage regulating circuit and the rectification voltage reducing circuit are all electrically connected with the same alternating current bus;
the alternating current voltage stabilizing control circuit and the bidirectional alternating current voltage regulating circuit form bidirectional electric connection and control the bidirectional alternating current voltage regulating circuit to realize bidirectional conversion with adjustable alternating current voltage and frequency;
the frequency tracking control circuit and the bidirectional high-frequency resonance circuit form bidirectional electric connection and control the bidirectional high-frequency resonance circuit to form high-frequency wireless charging voltage or receive high-frequency wireless discharging voltage;
the first direct current voltage stabilizing control circuit and the bidirectional rectification inversion voltage regulating circuit form bidirectional electric connection and control the bidirectional rectification inversion voltage regulating circuit to realize the alternating current/direct current rectification inversion function with adjustable size and frequency;
the second direct current voltage stabilization control circuit and the rectification voltage reduction circuit form one-way electric connection and are used for providing stable 5V direct current voltage,
the control method comprises the following steps:
s1, according to the difference of the voltage accessed to the multi-path power supply integrated assembly, four working modes are provided, when the accessed voltage is the commercial power, the working modes are switched to be the working modes, and the working modes jump to the step S2;
when the access voltage is the alternating current different from the commercial power, switching to the second working mode and jumping to the step S3;
when the access voltage is direct current, switching to the third working mode and jumping to the step S4;
when the alternating current with the high-frequency voltage is switched in, switching to the fourth working mode and jumping to the step S5;
s2, first working mode: the alternating current voltage regulating circuit is connected with the alternating current bus, and alternating current voltage output with adjustable size is obtained through the bidirectional alternating current voltage regulating circuit and the alternating current voltage stabilizing control circuit; the direct-current voltage output with adjustable size is obtained through the bidirectional rectification inversion voltage regulating circuit and the first direct-current voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit; obtaining high-frequency alternating current output with adjustable size and frequency through a bidirectional high-frequency resonance circuit and a frequency tracking control circuit; then go to step S6;
s3, second working mode: the access voltage is connected with the alternating current voltage stabilization control circuit, the commercial power value is taken as the set value, and the commercial power is obtained on the alternating current bus through the bidirectional alternating current voltage regulation circuit and the alternating current voltage stabilization control circuit; then, a direct current voltage output with adjustable size is obtained through the bidirectional rectification inversion voltage regulating circuit and the first direct current voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit; obtaining high-frequency alternating current output with adjustable size and frequency through a bidirectional high-frequency resonance circuit and a frequency tracking control circuit; then go to step S6;
s4, operation mode three: the access voltage is connected with a first direct current voltage stabilization control circuit, the set value is the commercial power value, and commercial power is obtained on the alternating current bus through a bidirectional rectification inversion voltage regulation circuit and the first direct current voltage stabilization control circuit; then, the alternating voltage output with adjustable magnitude is obtained through the bidirectional alternating voltage regulating circuit and the alternating voltage stabilizing control circuit; 5V direct-current voltage output is obtained through the rectification voltage reduction circuit and the second direct-current voltage stabilization control circuit; obtaining high-frequency alternating current output with adjustable size and frequency through a bidirectional high-frequency resonance circuit and a frequency tracking control circuit; then go to step S6;
s5, working mode four: the voltage is connected with the frequency tracking control circuit, the commercial power value is taken as the set value, and the commercial power is obtained on the alternating current bus through the bidirectional high-frequency resonance circuit and the frequency tracking control circuit; then, the alternating voltage output with adjustable magnitude is obtained through the bidirectional alternating voltage regulating circuit and the alternating voltage stabilizing control circuit; the direct-current voltage output with adjustable size is obtained through the bidirectional rectification inversion voltage regulating circuit and the first direct-current voltage stabilizing control circuit; 5V direct current voltage output is obtained through the rectification voltage reduction circuit and the second direct current voltage stabilization control circuit,
and S6, the multi-path power supply integration assembly keeps working until the input voltage changes, and then the operation returns to the step S1.
2. The method of claim 1, wherein the method further comprises the steps of: the bidirectional alternating current voltage regulating circuit comprises an input filter circuit a, a bridge rectifier circuit, a direct current chopper circuit, a bridge inverter circuit and an output filter circuit a which are sequentially connected, wherein the bridge rectifier circuit and the bridge inverter circuit are respectively provided with four controllable switching devices, and each controllable switching device is connected with a reverse diode in parallel; the direct current chopper circuit is composed of a controllable switching device and an energy storage inductor; the input filter circuit a and the output filter circuit a are both composed of filter inductors and filter capacitors;
the bidirectional high-frequency resonance circuit comprises a bridge rectifier circuit, a high-frequency inverter circuit, a resonance network and a coil which are connected in sequence, wherein the resonance network is an LCC resonance structure consisting of two filter capacitors and a filter inductor, and the coil is electrified to generate a high-frequency coupling magnetic field;
the bidirectional rectification inversion voltage regulating circuit comprises an input filter circuit b, a bridge type bidirectional AC/DC conversion circuit and an output filter circuit b which are sequentially connected, wherein the input filter circuit b and the output filter circuit b are respectively composed of an energy storage inductor and a filter capacitor, and the bridge type bidirectional AC/DC conversion circuit is composed of four full-control switch devices and reverse diodes connected with each full-control switch device in parallel.
3. The method of claim 1, wherein the method further comprises the steps of: the alternating current voltage stabilization control circuit at least comprises a PID regulator and a PWM generator; the frequency tracking control circuit at least comprises a sampling resistor, an amplifying circuit and a phase inverter; the first direct current voltage stabilization control circuit at least comprises a current PI controller and a voltage PI controller.
4. The method of claim 1, wherein the method further comprises the steps of: the control method of the alternating current voltage stabilization control circuit specifically comprises the following steps: a fuzzy RBF neural network PID voltage stabilization control strategy is adopted, the voltage deviation e and the deviation change rate ec of the collected bridge inverter circuit output voltage and the specified voltage are used as a fuzzy RBF neural network, three parameters Kp, Ki and Kd of a PID regulator are output, a PWM generator generates PWM pulse signals by combining the voltage deviation e and the deviation change rate ec through the PID regulator, and the on-off of controllable switching devices in a bridge rectifier circuit, a direct current chopper circuit and the bridge inverter circuit is driven and controlled to obtain the required output alternating current voltage.
5. The method of claim 1, wherein the method further comprises the steps of: the control method of the frequency tracking control circuit specifically comprises the following steps: the frequency tracking and automatic frequency modulation control strategy based on the phase-locked loop is adopted, a current signal of a transmitting end of the bidirectional high-frequency resonance circuit is collected through a sampling resistor, a voltage signal with the same frequency and phase as the current of the bidirectional high-frequency resonance circuit is obtained through an amplifying circuit, a voltage signal with the same frequency and phase as the voltage of the bidirectional high-frequency resonance circuit is obtained through phase compensation and a phase inverter, a driving signal determined by the phase difference between the two voltage signals is obtained through the phase-locked loop, the on-off frequency of a switching tube in the high-frequency inverter circuit is adjusted until the phase difference between the voltage and the current of the bidirectional high-frequency resonance circuit is zero, the transmitting end circuit is in a complete series resonance state, and the automatic frequency tracking is realized.
6. The method of claim 1, wherein the method further comprises the steps of: the control method of the first direct current voltage stabilization control circuit specifically comprises the following steps: the voltage and current double closed loop control based on the direct current control of the PI controller is adopted, namely, an outer loop controls and stabilizes direct current output voltage, an inner loop controls and stabilizes alternating current, the actual direct current voltage acquired by the voltage outer loop is compared with the set and tracked command voltage, amplitude reference can be provided for the current inner loop through the PI controller, the amplitude reference is multiplied by a sine signal with the same phase as the alternating current sine voltage of an alternating current side through a multiplier to obtain the command reference current of the current inner loop, the current inner loop is compared with the reference current obtained before through the actual current acquired by the alternating current side, and the control of a full-control switching tube is realized through the PI controller, so that the controlled current of the alternating current side changes according to the command reference current, and the purpose of tracking the voltage by the current is realized.
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| CN114531031B (en) * | 2020-11-23 | 2024-03-19 | 中国船舶集团有限公司第七一一研究所 | Control system and control method of marine high-power bidirectional direct current converter |
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| CN200997569Y (en) * | 2006-12-11 | 2007-12-26 | 武汉大学 | Frequency-variable and voltage-adjusting power supply |
| JP5993304B2 (en) * | 2009-09-09 | 2016-09-14 | オークランド ユニサービシズ リミテッドＡｕｃｋｌａｎｄ Ｕｎｉｓｅｒｖｉｃｅｓ Ｌｉｍｉｔｅｄ | Power demand management in inductive power transmission systems |
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| CN207339325U (en) * | 2017-08-30 | 2018-05-08 | 珠海格力电器股份有限公司 | A kind of charger |
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