CN108233683B - Single-phase alternating current signal power amplification control system - Google Patents
Single-phase alternating current signal power amplification control system Download PDFInfo
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- CN108233683B CN108233683B CN201810025571.9A CN201810025571A CN108233683B CN 108233683 B CN108233683 B CN 108233683B CN 201810025571 A CN201810025571 A CN 201810025571A CN 108233683 B CN108233683 B CN 108233683B
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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
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
-
- 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
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0009—Devices or circuits for detecting current in a converter
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0025—Arrangements for modifying reference values, feedback values or error values in the control loop of a converter
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Amplifiers (AREA)
Abstract
A single-phase alternating current signal power amplification control system comprises a PFC chip A, PFC chip B, an alternating current sampling circuit and an SPWM drive circuit; the input end of the alternating current sampling circuit is connected with an alternating current signal needing to be amplified by power; a first output end of the alternating current sampling circuit is connected with a current sampling input end of the PFC chip A through a negative value processing circuit; the second output end of the alternating current sampling circuit is connected with the current sampling input end of the PFC chip B through the reverse circuit and the negative value processing circuit in sequence; the driving output ends of the PFC chip A and the PFC chip B are connected with the input end of the SPWM driving circuit; the output end of the SPWM drive circuit is connected with the inverter circuit and the filter circuit; the output current and voltage ends of the filter circuit are respectively connected to the voltage feedback input pins of the PFC chip A and the PFC chip B through the voltage/current sampling processing circuit. The invention does not need software algorithm and AD sampling, can realize the power amplification of the alternating current signal by completely adopting an analog chip, has the phase difference of less than 1 degree and greatly reduces the cost.
Description
Technical Field
The invention relates to a power supply control driving technology, in particular to a single-phase alternating current signal power amplification control system.
Background
The prior art power amplification method for generating a closed-loop synchronous single-phase ac signal is usually implemented by a high-speed digital processor. As shown in fig. 1: the method comprises the steps that an alternating current sampling circuit samples alternating current signals needing synchronous amplification, the alternating current signals are converted into digital quantity through an A/D conversion chip or an A/D chip arranged in an MCU, the MCU analyzes and processes the digital signals, and PWM signals with the same phase and frequency are generated through an algorithm to drive a switching device, so that high-power alternating current signals are obtained; the feedback large voltage and current signals are converted into digital quantities through a voltage/current sampling processing circuit (such as an AD sampling circuit) and are fed back to the MCU, and the MCU adopts a PID algorithm to control the power switch to obtain the voltage or current required by a target. However, the phase difference of the control circuit is not high in precision due to factors such as complex program algorithm and program delay, and meanwhile, the program has the failure risk of runaway.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a single-phase alternating current signal power amplification control system which is simple and reliable in control, free of a program algorithm, high in phase precision and short in response time.
The technical scheme of the invention is as follows: a single-phase alternating current signal power amplification control system comprises a PFC chip A, PFC chip B, an alternating current sampling circuit, an inverter circuit, a negative value processing circuit, an SPWM drive circuit, an inverter circuit and a filter circuit;
the input end of the alternating current sampling circuit is connected with an alternating current signal needing to be amplified by power;
the first output end of the alternating current sampling circuit is connected with the current sampling input end of the PFC chip A through the negative value processing circuit;
the second output end of the alternating current sampling circuit is connected with the current sampling input end of the PFC chip B through the reverse circuit and the negative value processing circuit in sequence;
the driving output ends of the PFC chip A and the PFC chip B are connected with the input end of the SPWM driving circuit; the output end of the SPWM drive circuit is connected with the inverter circuit and the filter circuit;
and the output current end and the output voltage end of the filter circuit are respectively connected to voltage feedback input pins of the PFC chip A and the PFC chip B through the voltage/current sampling processing circuit.
Further, the voltage/current sampling processing circuit comprises a voltage/current sampling and average value/effective value detection circuit and a given voltage external matching circuit, and an output current end and an output voltage end of the filter circuit are connected to voltage feedback input pins of the PFC chip A and the PFC chip B through the voltage/current sampling and average value/effective value detection circuit and the given voltage external matching circuit in sequence.
Further, the given voltage of the given voltage external matching circuit is connected with an external given voltage; or the given voltage is the alternating current signal which needs to be amplified by power, the alternating current signal is connected with the input end of the mean value/effective value detection circuit through the alternating current sampling circuit, and the output end of the mean value/effective value detection circuit is connected with the given voltage of the given voltage external matching circuit.
Furthermore, the given voltage of the given voltage external matching circuit is connected with the output end of the external given voltage or the average value/effective value detection circuit through the control switch, so that the switching between the given voltage and the output end of the average value/effective value detection circuit is realized. The invention can adopt a control switch for switching, and can also select any one of two paths of signals as input.
Further, a third output end of the alternating current sampling circuit is connected with an input end of the SPWM driving circuit through a zero detection and positive holding circuit.
Further, the output end of the reverse circuit is also connected with the input end of the zero-crossing detection and positive holding circuit.
Furthermore, the inverter circuit is an inverter bridge formed by four switching tubes; the filter circuit is connected with the middle point of the inverter bridge; the filter circuit is an LC filter circuit.
Further, the driving circuit comprises a driving chip and a peripheral component connected with the driving chip.
Further, the external given voltage matching circuit comprises a first operational amplifier, a second operational amplifier and a third operational amplifier, wherein the non-inverting input end of the first operational amplifier is connected with the output end of the voltage/current sampling and average value/effective value detection circuit, the inverting input end of the second operational amplifier is connected with the given voltage, and the output ends of the first operational amplifier and the second operational amplifier are connected with the non-inverting input end of the third operational amplifier through resistors.
Further, the voltage/current sampling processing circuit comprises a voltage/current sampling unit and an average value/effective value detection unit, wherein the voltage/current sampling unit is used for collecting voltage/current alternating current signals output by the filter circuit; and processing the alternating current signal through the average value or the effective value to obtain a direct current signal.
Further, the switch tube is an IGBT tube or an MOS tube or other switch devices.
The invention has the beneficial effects that: the control system of the invention can realize the power amplification of alternating current signals by completely adopting analog chips without software algorithm and AD sampling, has small phase error, can achieve the phase difference below 1 degree, saves a single chip microcomputer chip and an AD chip, does not need software development cost, and greatly reduces the development and finished product cost.
Drawings
FIG. 1 is a schematic diagram of a prior art circuit configuration;
FIG. 2 is a schematic circuit diagram of an embodiment of the present invention;
FIG. 3 is a circuit schematic of a given voltage external matching circuit according to an embodiment of the present invention;
FIG. 4 is a circuit schematic of an SPWM driver circuit in accordance with an embodiment of the present invention;
FIG. 5 is a circuit schematic of a negative processing circuit according to an embodiment of the present invention;
FIG. 6 is a control schematic diagram of an SPWM driver circuit in accordance with an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and specific examples.
As shown in fig. 2: a single-phase alternating-current signal power amplification control system comprises a PFC chip A, PFC chip B, an alternating-current sampling circuit, an inverter circuit, a negative value processing circuit, an SPWM drive circuit, an inverter circuit and a filter circuit.
The input end of the alternating current sampling circuit is connected with an alternating current signal needing to be amplified by power. And a first output end of the alternating current sampling circuit is connected with a current sampling input end of the PFC chip A through the negative value processing circuit. And the second output end of the alternating current sampling circuit is connected with the current sampling input end of the PFC chip B through the reverse circuit and the negative value processing circuit in sequence.
And the driving output ends of the PFC chip A and the PFC chip B are connected with the input end of the SPWM driving circuit. The output end of the SPWM drive circuit is connected with the inverter circuit and the filter circuit. An output current end and an output voltage end of the filter circuit are respectively connected to voltage feedback input pins of the PFC chip A and the PFC chip B through the voltage/current sampling processing circuit.
In the invention, two PFC chips are adopted to respectively generate SPWM signal positive half-wave and SPWM signal negative half-wave, namely, the PFC chip A generates SPWM signal positive half-wave and the PFC chip B generates SPWM signal negative half-wave. The inverter circuit is driven by the SPWM driving circuit, and the generated high-power SPWM signal is filtered by the filter circuit to generate a sine wave signal, so that the power amplification of the AC small signal is realized.
According to the scheme, a software algorithm is not needed, AD sampling is not needed, power amplification of alternating current signals can be achieved by completely adopting an analog circuit chip, the phase difference can reach below 1 degree, meanwhile, a single chip microcomputer, a DSP or MCU chip and an AD chip are saved, software development cost is not needed, and development, production and maintenance cost and efficiency are reduced.
The two negative value processing circuits are respectively connected with the PFC chip A and the PFC chip B, and the two negative value processing circuits are identical in structure. The alternating current signal only leaves a positive half-wave signal after passing through a negative value processing circuit and is sent to a PFC chip A; and the alternating current signal only leaves a negative half-wave signal after sequentially passing through the reverse circuit and the negative value processing circuit and is sent to the PFC chip B. Through the alternate operation of the SPWM signal positive half-wave and the SPWM signal negative half-wave, the power supply can continuously provide the pure sine wave alternating current with constant frequency, constant voltage and no Kazaki-sized variation.
Further, the voltage/current sampling processing comprises a voltage/current sampling and average value/effective value detection circuit and a given voltage external matching circuit, and an output current end and an output voltage end of the filter circuit are connected to voltage feedback input pins of the PFC chip A and the PFC chip B through the voltage/current sampling and average value/effective value detection circuit and the given voltage external matching circuit in sequence.
The two external matching circuits for the given voltage are respectively connected with the PFC chip A and the PFC chip B, and the two negative value processing circuits are identical in structure.
The voltage/current sampling and average value/effective value detection circuit comprises a voltage/current sampling unit and an average value/effective value detection unit, wherein the voltage/current sampling unit is used for collecting a voltage/current alternating current signal output by a filter circuit; and processing the alternating current signal through the mean value or the effective value to obtain a direct current signal, and transmitting the direct current signal to the given voltage external matching circuit. Meanwhile, the given voltage of the given voltage external matching circuit can be an external given voltage or an effective value/average value of a sampled AC signal, and any one of the two paths of signals is selected as an input. The effective value/average value of the AC signal is obtained by sequentially outputting an alternating current signal needing to be power-amplified through an alternating current sampling circuit and an average value/effective value detection circuit.
The external given voltage matching circuit has the advantages that the given voltage output by most PFC chips is built internally, no special given voltage output pin is provided, and the voltage or current amplitude of the amplified power signal needs to be changed according to actual conditions. By setting the given voltage external matching circuit, a target given reference can be given through an external reference or the amplitude of an alternating current signal, and the alternating current signal is processed through a mean value or an effective value to obtain a direct current signal. The external given voltage matching circuit integrates the given voltage signal and the output signal of the actual voltage/current sampling and average value/effective value detection circuit and transmits the integrated signal to the voltage feedback input pins of the PFC chip A and the PFC chip B, so that the flexible adjustment of the voltage or current amplitude of the amplified power signal is realized.
Furthermore, a third output end of the alternating current sampling circuit is connected with an input end of the SPWM driving circuit through a zero detection and positive holding circuit. The output end of the reverse circuit is connected with the input end of the zero-crossing detection and positive holding circuit.
The zero-crossing detection and positive holding circuit is used for forbidding the signal output drive of the PFC chip B when the alternating current signal is a positive half wave; and when the alternating current signal is a negative half wave, the driving circuit is used for forbidding the signal output of the PFC chip A.
The following is a preferred embodiment of the present invention:
the model of the PFC chip a and the model of the PFC chip B in this embodiment are ICE2PCS05, where the current sampling input terminal is pin 3 of the ICE2PCS05 chip, the driving output terminal is pin 8 of the ICE2PCS05 chip, and the voltage feedback input terminal is pin 6 of the ICE2PCS05 chip.
In the embodiment, the inverter circuit is an inverter bridge formed by four switching tubes Q1-Q4, the output end of the SPWM driving circuit is respectively connected with the gate electrode and the emitting electrode of each switching tube, and the collector electrode of each switching tube is connected with a direct-current power supply. The filter circuit is an LC filter circuit and comprises an inductor L and a capacitor C. The LC filter circuit is connected between the emitting electrodes of the four switching tubes. An output current end IM and an output voltage end VM of the LC filter circuit are respectively connected with the input end of the voltage/current sampling and average value/effective value detection circuit.
As shown in fig. 3: in this embodiment, the external matching circuit for a given voltage includes an operational amplifier U1, an operational amplifier U2, and an operational amplifier U3, wherein the non-inverting input terminal of the operational amplifier U1 is connected to the output terminal of the voltage/current sampling and average/effective value detecting circuit through a resistor R5; the inverting input terminal of the operational amplifier U2 is connected with a given voltage Vref and a +3V voltage through resistors R1 and R2, respectively; the output ends of the operational amplifier U1 and the operational amplifier U2 are respectively connected with the non-inverting input end of the operational amplifier U3 through resistors R6 and R7, and the output end of the operational amplifier U3 is connected with the voltage feedback input ends of the PFC chip A and the PFC chip B.
As shown in fig. 4: in this embodiment, the SPWM driving circuit includes an HCNW3120 driving chip, the 6 th and 7 th pins of the HCNW3120 driving chip are connected to two triodes VT1 and VT2 through a resistor R10, an emitter of the triode VT1 is connected to an emitter of the triode VT2, a high-power driving signal is output between two emitters of the triodes VT1 and VT2, and four switching tubes Q1 to Q4 are driven. The transistor VT1 is an NPN transistor, and the transistor VT2 is a PNP transistor.
In this embodiment, the inverter circuit is an inverter.
As shown in fig. 5: in this embodiment, the negative value processing circuit includes an operational amplifier U4, and a non-inverting input terminal of the operational amplifier U4 is connected to the ac sampling circuit or the inverter circuit via a resistor R13; the output end of the operational amplifier U4 is connected with the current sampling input ends of the PFC chip A and the PFC chip B through a resistor R14 and a diode D1; the output terminal of the operational amplifier U4 is also connected to the inverting input terminal of the operational amplifier U4 via a resistor R14 and a diode D1.
The working principle of the embodiment is as follows: the AC sampling circuit collects an AC signal generated by an AC signal source AC, and only a positive half-wave signal is left at one output end of the AC sampling circuit after passing through the negative value processing circuit and is sent to a current sampling input pin of the PFC chip A; the other output end of the negative half-wave signal is only left after passing through a reverse circuit and a negative value processing circuit in sequence; the PFC chip A and the PFC chip B generate SPWM signals of high-frequency carriers and drive four switching tubes Q1-Q4 through an SPWM driving circuit. As shown in fig. 6: the method specifically comprises the following steps:
the positive output of the drive output PWMA of the PFC chip A drives the switching tubes Q2 and Q3, and the negative output of the PWMA drives the switching tubes Q1 and Q4;
the positive output of the drive output PWMB of the PFC chip B drives the switching tubes Q1, Q4, and the negative output of PWMB drives the switching tubes Q2, Q3.
When the alternating current signal is a positive half wave, a pulse signal when the sine wave is the positive half wave is obtained through the zero-crossing detection and positive holding circuit, the signal output driving of the PFC chip B is forbidden through the pulse signal, the signal output driving of the PFC chip A is allowed, and the positive half wave of the input sine wave signal is obtained after the driving signal generated by the PFC chip A passes through the switching tube and the filter circuit. When the alternating current signal is a negative half wave, a pulse signal when the input signal is the negative half wave is obtained through the reverse circuit and the zero-crossing detection and positive holding circuit, the signal output driving of the PFC chip A is forbidden and the signal output driving of the PFC chip B is allowed through the pulse signal, and the negative half wave of the input sine wave signal is obtained after the driving signal generated by the PFC chip B passes through the switching tube and the filter circuit.
And filtering the signal by an LC filter circuit to generate a sine wave signal, thereby realizing power amplification of an alternating current signal generated by an alternating current signal source AC. The voltage/current sampling unit is used for collecting output voltage or current signals, the output voltage or current signals are sent to the given voltage external matching circuit to be compared with given voltage, and the given voltage external matching circuit processes and integrates the given signals and actual voltage/current output signals, so that the LC filter circuit outputs signals with the same frequency and phase as AC input of the alternating current signal source and sends the signals to voltage feedback input pins of the PFC chip A and the PFC chip B, and pure sine wave alternating current with constant frequency, constant voltage and no Kazaki-variation is obtained.
The above circuit structure is only one preferred embodiment of the present invention for illustrating a part of the circuit, but does not limit the scope of the circuit structure of the present invention. The circuit can adopt any circuit structure with the same function as the circuit in the prior art.
Claims (8)
1. A single-phase alternating current signal power amplification control system is characterized by comprising a PFC chip A, PFC chip B, an alternating current sampling circuit, an inverter circuit, a negative value processing circuit, an SPWM drive circuit, an inverter circuit and a filter circuit;
the input end of the alternating current sampling circuit is connected with an alternating current signal needing to be amplified by power;
the first output end of the alternating current sampling circuit is connected with the current sampling input end of the PFC chip A through the negative value processing circuit;
the second output end of the alternating current sampling circuit is connected with the current sampling input end of the PFC chip B through the reverse circuit and the negative value processing circuit in sequence;
the third output end of the alternating current sampling circuit is connected with the input end of the SPWM driving circuit through the zero detection and positive holding circuit; the output end of the reverse circuit is also connected with the input end of the zero-crossing detection and positive holding circuit;
the driving output ends of the PFC chip A and the PFC chip B are connected with the input end of the SPWM driving circuit; the output end of the SPWM drive circuit is connected with the inverter circuit and the filter circuit; the inverter circuit is an inverter bridge formed by four switching tubes, and SPWM signals generated by the PFC chip A and the PFC chip B drive the four switching tubes through an SPWM drive circuit;
and the output current end and the output voltage end of the filter circuit are respectively connected to voltage feedback input pins of the PFC chip A and the PFC chip B through the voltage/current sampling processing circuit.
2. The single-phase ac signal power amplification control system according to claim 1, wherein the voltage/current sampling processing circuit includes a voltage/current sampling and average/effective value detection circuit and a given voltage external matching circuit, and an output current terminal and an output voltage terminal of the filter circuit are connected to voltage feedback input pins of the PFC chip a and the PFC chip B through the voltage/current sampling and average/effective value detection circuit and the given voltage external matching circuit in sequence.
3. The single-phase ac signal power amplification control system according to claim 2, wherein the given voltage of the given voltage external matching circuit is connected to an external given voltage; or the given voltage is the alternating current signal which needs to be amplified by power, the alternating current signal is connected with the input end of the mean value/effective value detection circuit through the alternating current sampling circuit, and the output end of the mean value/effective value detection circuit is connected with the given voltage of the given voltage external matching circuit.
4. The single-phase ac signal power amplification control system of claim 3, wherein the given voltage of the given voltage external matching circuit is connected to the output terminal of the external given voltage or the average/effective value detection circuit via a control switch, so as to switch between the given voltage and the external given voltage or the average/effective value detection circuit.
5. The single-phase alternating-current signal power amplification control system according to any one of claims 1 to 4, wherein the filter circuit is connected to a middle point of the inverter bridge; the filter circuit is an LC filter circuit.
6. The single-phase alternating-current signal power amplification control system as claimed in any one of claims 1 to 4, wherein the driving circuit comprises a driving chip and peripheral components connected with the driving chip.
7. The single-phase ac signal power amplification control system according to claim 3 or 4, wherein the given voltage external matching circuit includes a first operational amplifier, a second operational amplifier, and a third operational amplifier, wherein a non-inverting input terminal of the first operational amplifier is connected to an output terminal of the voltage/current sampling and average/valid value detection circuit, an inverting input terminal of the second operational amplifier is connected to the given voltage, and output terminals of the first operational amplifier and the second operational amplifier are connected to a non-inverting input terminal of the third operational amplifier via a resistor.
8. The single-phase alternating current signal power amplification control system as claimed in claim 2, 3 or 4, wherein the voltage/current sampling processing circuit comprises a voltage/current sampling unit and a mean value/effective value detection unit, the voltage/current sampling unit is used for collecting the voltage/current alternating current signal output by the filter circuit; and processing the alternating current signal through the average value or the effective value to obtain a direct current signal.
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| CN201810025571.9A CN108233683B (en) | 2018-01-11 | 2018-01-11 | Single-phase alternating current signal power amplification control system |
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| CN201810025571.9A CN108233683B (en) | 2018-01-11 | 2018-01-11 | Single-phase alternating current signal power amplification control system |
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| CN204347110U (en) * | 2014-12-31 | 2015-05-20 | 广东易事特电源股份有限公司 | A kind of alternating current sample circuit |
| CN105226658A (en) * | 2015-11-13 | 2016-01-06 | 四川英杰电气股份有限公司 | A kind of Active Power Filter-APF and peak current method for limiting thereof |
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| CN1119850C (en) * | 2000-11-06 | 2003-08-27 | 成都希望电子研究所 | Transformer equipment for increasing energy utilization rate of wind-driven electric generation |
| CN107147316B (en) * | 2017-05-17 | 2019-06-11 | 华南师范大学 | A kind of AC power circuit and its control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204347110U (en) * | 2014-12-31 | 2015-05-20 | 广东易事特电源股份有限公司 | A kind of alternating current sample circuit |
| CN105226658A (en) * | 2015-11-13 | 2016-01-06 | 四川英杰电气股份有限公司 | A kind of Active Power Filter-APF and peak current method for limiting thereof |
Non-Patent Citations (1)
| Title |
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| 《CCM-PFC ICE2PCS05 ICE2PCS05G STANDALONE POWER FACTOR CORRECTION (PFC) CONTROLLER IN CONTINUOUS CONDUCTION MODE (CCM)》;INFINEON;《芯片手册》;20081031;第1-21页 * |
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Denomination of invention: A single phase AC signal power amplifier control system Effective date of registration: 20210427 Granted publication date: 20201208 Pledgee: Hunan Xingsha Rural Commercial Bank Co.,Ltd. quantang sub branch Pledgor: CHANGSHA GUANGYI CONVERTING TECHNIQUE Co.,Ltd. Registration number: Y2021980003071 |