WO2014166279A1 - 一种电子转换器电路系统及控制方法 - Google Patents
一种电子转换器电路系统及控制方法 Download PDFInfo
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- WO2014166279A1 WO2014166279A1 PCT/CN2013/089866 CN2013089866W WO2014166279A1 WO 2014166279 A1 WO2014166279 A1 WO 2014166279A1 CN 2013089866 W CN2013089866 W CN 2013089866W WO 2014166279 A1 WO2014166279 A1 WO 2014166279A1
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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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac 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
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators
- H02M3/157—Conversion of dc power input into dc power output without intermediate conversion into ac 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 with automatic control of output voltage or current, e.g. switching regulators with digital control
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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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
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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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
- H02M1/4225—Arrangements for improving power factor of AC input using a non-isolated boost converter
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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
- 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
- H02M7/53873—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 with digital control
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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
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0012—Control circuits using digital or numerical techniques
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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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/327—Means for protecting converters other than automatic disconnection against abnormal temperatures
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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
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Definitions
- the invention relates to an electronic converter, in particular to an electronic converter for DC to AC, AC to AC (AC) To AC), AC to DC or DC to DC conversion circuits and control methods.
- the frequency of the output AC of the converter inverter part it can be divided into power frequency inverter, medium frequency inverter and high frequency inverter.
- the power frequency generally refers to an inverter of 50 to 60 Hz; the frequency of the intermediate frequency inverter is generally 400 Hz to several tens of kHz; the frequency of the high frequency inverter is generally tens of kHz to MHz.
- the number of phases input by the converter inverter part it can be divided into single-phase inverter, three-phase inverter and multi-phase inverter.
- the main circuit of the converter inverter part it can be divided into single-ended, push-pull, half-bridge and full-bridge inverters.
- main switching device of converter inverter part it can be divided into thyristor inverter, transistor inverter, FET inverter and IGBT inverter.
- inverter According to the inverter's inverter part output stable parameters, it can be divided into voltage type inverter and current type inverter.
- the converter inverter part control mode it can be divided into frequency modulation (PFM) inverter and pulse width modulation (PWM) inverter.
- PFM frequency modulation
- PWM pulse width modulation
- the current electronic converter has weak control ability on the load, especially in the high-frequency conversion process, which is easy to generate excess electromagnetic energy, causing magnetic field pollution to the surrounding environment; in the process of load change, the converter The internal response is sluggish and can easily cause system failure.
- an aspect of the present invention provides an electronic converter circuitry to address at least one of the problems found in the background.
- An electronic converter circuit system comprising:
- Power input module filter module, power factor adjustment module, rectifier filter and parameter detection module, converter inverter module, switch device drive module, digital control system module and control system power supply module;
- the power input module is connected to a power source for power supply, and is used as an input end of the circuit system to adapt to various power input models, such as single-phase input, three-phase input, and multi-phase input;
- the filtering module is connected to the power input module, and the filtering module is an active filtering or passive filtering module, configured to filter the output signal of the power input module;
- the power factor adjustment module is connected to the filter module, and is configured to process an output signal of the filter module to adjust and improve a power factor of the system;
- the rectification filtering and parameter detection module is connected to the power factor adjustment module, and is configured to perform rectification and filtering processing on the output signal of the power factor adjustment module, and then send the same to the converter inverter module, and simultaneously detect the electrical parameters (including after the rectification and filtering process) Voltage, current and voltage ripple electrical parameters) and feedback to the digital control system module through the corresponding sensor;
- the input end of the converter inverter module is connected with the rectification filter and the parameter detection module, and the output end of the converter inverter module is connected with the load, and the main circuit form of the converter inverter module includes a single-ended type, a push-pull type, Half bridge and full bridge;
- the load may be a power grid or a fixed load, and a load detection module for detecting a frequency characteristic, a magnetic saturation state, and a load temperature of the load is further disposed between the load and the converter inverter module;
- the switching device driving module is connected between the digital control system module and the converter inverting module, and is configured to control the working state of the converter inverting module by receiving a switching signal generated by the digital control system module;
- the control system power supply module is coupled to the digital control system module for powering the digital control system module.
- the digital control system module comprises: a control center module, a parameter receiving and control enabling module, an input module and a display module both connected to the control center module; the control center module is a control core of the entire electronic converter circuit system, and a data convergence point And the computing center, which comprises a system computing core module, a data acquisition module, a data driving output module, an input and display data processing module, and a data storage module connected to the system computing core module.
- the power input module is provided with a parameter detecting module
- the parameter detecting module comprises a current detecting sub-module, a voltage detecting sub-module, a temperature detecting sub-module and a phase loss detecting sub-module; each sub-module is provided with a corresponding sensor,
- the corresponding parameters are transmitted to the parameter receiving and control enabling module of the digital control system module.
- the power factor adjustment module is provided with a signal parameter acquisition module for collecting electrical signal parameters, and the signal parameter acquisition module transmits the collected electrical signal parameters to the parameter receiving and control enabling module of the digital control system module. .
- the electrical signal parameter comprises an AC voltage signal V AC at the input of the power factor adjustment module, an AC current signal I AC , a DC voltage signal V DC at the output of the power factor adjustment module, a ground signal GND , and a power factor adjustment module.
- control system power supply module includes a rectifying unit, a high frequency converting unit and a packet coupling output unit connected in sequence; the rectifying unit is connected to an input end of the rectifying filtering and parameter detecting module, and the grouping coupling output unit is The digital control system module is connected, and the packet coupling output unit is further connected with the switching device driving module for supplying power to the digital control system module connection and the switching device driving module; the switching device driving module is used for driving the driving device of the switching device The signal is electrically isolated and then the switching device is operated.
- the electronic converter circuit system is further provided with an emergency stop power controller for forcibly powering down the electronic converter circuit system in an emergency situation; the emergency stop power controller is connected in series to the power
- the factor adjustment module is between the rectification filter and the parameter detection module.
- the electronic converter circuit system is further provided with an environmental parameter acquisition module connected to the digital control system module;
- the environmental parameter acquisition module includes at least one of a temperature and humidity tester, an altimeter or a Gauss meter.
- the instrument is used to detect environmental parameters such as temperature, humidity, altitude and electromagnetic field strength.
- the present invention also provides a control method based on the above electronic converter circuit system, the method steps comprising:
- Step 1 Setting a threshold parameter for protecting the electronic converter circuit system in the digital control system module
- Step 2 detecting electrical parameters of each module and the load, and transmitting the electrical parameters to the digital control system module;
- the modules include a power input module, a filtering module, a power factor adjustment module, a rectification filtering, and a parameter detection module.
- Step 3 The digital control system module receives and detects the electrical parameter.
- Step 4 output a control instruction that satisfies the stability requirement to ensure that the electronic converter circuit system operates in a stable state
- Step 5 The electronic converter circuit system starts to start, and the power required by the load is gradually reached by stepping the power less than the preset value X;
- Step 6 detecting and judging whether the parameters of the electronic converter circuit system are abnormal in real time, and if the abnormality is, protecting the electronic converter circuit system, and waiting for the parameters to be normal, the electronic converter circuit system continues to work;
- Step 7 when the electronic converter circuit system enters the end state, the power is gradually reduced to 0 by the power less than the preset value X;
- Step 8 If an emergency occurs during the operation of the electronic converter circuit system, the electronic converter circuit system can be forcibly powered off by controlling the emergency stop power controller.
- control method further includes:
- Step a the electronic converter circuit system acquires and detects environmental parameters, determines whether the electronic converter circuit system works within a safe range, and if so, proceeds to the next step; if not, prompts the user that the electronic converter circuit system is not working In a safe environment, repeat step a. .
- the threshold parameter described in step 1 includes a peak voltage, a peak current of the converter inverter module during the conversion process, a maximum operating temperature of each module, and a detection parameter when the circuit system is in an abnormal state; the circuit system is not
- the detection parameters in the normal state include one or more of phase loss detection, low voltage detection, and output short circuit detection.
- the electrical parameters of each module and the load described in step 2 include one or more of the following parameters:
- the voltage, current, phase, and temperature of the switching device drive module are The voltage, current, phase, and temperature of the switching device drive module
- the electronic converter circuit system of step 4 operates in a steady state in which the electronic converter circuit system operates within a set threshold parameter; the preset value X described in steps 5 and 7 is 30 W;
- the environmental parameters include one or more of humidity, temperature, altitude, and electromagnetic field strength of the environment in which the electronic converter circuitry is located.
- the digital control system module of the electronic converter circuit system of the invention is a digital control platform which is a hardware circuit and software which is built around a digital control chip, and has a single-ended, push-pull, half-bridge and full-bridge type. Various control modes, with simple settings, can work in the corresponding mode.
- the electronic converter circuit system mainly controls the field effect transistor and the IGBT (insulated gate bipolar transistor), and the instruction of the control process is outputted by the control platform for comprehensive diagnosis and analysis of each module, and the circuit works stably and converts during the conversion process. High efficiency and electromagnetic compatibility can be controlled within the standard range, not only environmentally friendly but also energy efficient.
- circuit protection parameters are set, but also the environment of the working environment around the circuit system such as temperature, humidity, altitude, electromagnetic field strength and the like. Parameters are tested to balance various environmental factors to ensure that the entire circuit system operates within a safe range.
- the electronic converter circuit system and the control method thereof have the advantages of strong adaptability, can be applied to meet the conversion requirements of various frequency segments, and are not limited by the number of input phases, and are particularly suitable for application in high power and multi-group electronic converter combinations. And the environment in which the controlled circuit is not consistent.
- FIG. 1 is a circuit block diagram of an electronic converter circuit system in an embodiment of the present invention
- FIG. 2 is a schematic flowchart of a control method in an embodiment of the present invention.
- FIG. 3 is a circuit block diagram of a digital control system module in an embodiment of the present invention.
- FIG. 4 is a circuit block diagram of the control center module of FIG. 3;
- FIG. 5 is a circuit block diagram of a power factor adjustment module according to an embodiment of the present invention.
- FIG. 6 is a circuit block diagram of a power supply module of a control system according to an embodiment of the present invention.
- FIG. 7 is a schematic diagram of an instantaneous short-circuit overvoltage state generated when a switching device is turned on and off in a circuit system according to an embodiment of the present invention
- FIG. 8 is a schematic diagram showing current and voltage states of a switching device when a sudden change in load occurs and an inductive current overshoot occurs in an embodiment of the present invention
- FIG. 9 is a schematic diagram of the operation of the switching device after the electrical isolation process is performed on the driving device of the switching device according to the embodiment of the present invention.
- Figure 10 is a flow chart showing the operation of the cooling system in the embodiment of the present invention.
- an electronic converter circuit system includes:
- Power input module filter module, power factor adjustment module, rectifier filter and parameter detection module, emergency stop power controller, converter inverter module, switch device drive module, digital control system module, control system power supply module and environmental parameter acquisition module .
- the circuit system described in the present invention refers to the electronic converter circuit system.
- the power input module is connected to a power source for power supply, and is used as an input end of the circuit system to adapt to various power input models, such as single-phase input, three-phase input, and multi-phase input;
- the filtering module is connected to the power input module for filtering the output signal of the power input module;
- the filtering module is an active filtering or passive filtering module, including a common mode suppression circuit, a differential mode suppression circuit, and random noise.
- the suppression circuit can be configured according to the electromagnetic compatibility standard requirements, so that the electromagnetic compatibility influence of the circuit system is controlled within the standard;
- the power factor adjustment module is connected to the filter module, and is configured to process an output signal of the filter module to adjust and improve a power factor of the system;
- the rectification filtering and parameter detection module is connected to the power factor adjustment module, and is configured to perform rectification and filtering processing on the output signal of the power factor adjustment module, and then send the same to the converter inverter module, and simultaneously detect the electrical parameters (including after the rectification and filtering process) Voltage, current and voltage ripple electrical parameters) and feedback to the digital control system module through the corresponding sensor;
- the input end of the converter inverter module is connected to the rectification filter and the parameter detection module, and the output end of the converter inverter module is connected to the load, and the load may be a power grid or a fixed load.
- the circuit system is prevented from generating excessive electromagnetic energy during the high-frequency conversion work, and electromagnetic pollution is caused to the surrounding environment, and a load is also provided between the load and the converter inverter module.
- a load detection module that detects the frequency characteristics of the load, the magnetic saturation state, and the load temperature.
- the load detection module feeds the measured frequency characteristic, the magnetic saturation state, and the load temperature to the digital control module through a corresponding sensor or signal transmission circuit, where the frequency characteristic refers to a reactance parameter of the load, such as a load acting as a capacitive reactance It is also inductive; the detection of the magnetic saturation state is for the detection of the load with the characteristics of the transformer, such as the magnetic field strength of the detected load and its relationship with the current value of the input load. For example, when the load reaches the magnetic saturation state, the temperature rise is higher due to the load with the transformer characteristic, and the conversion efficiency of the circuit system is lower when the magnetic saturation state is greatly deviated.
- the frequency characteristic refers to a reactance parameter of the load, such as a load acting as a capacitive reactance It is also inductive
- the detection of the magnetic saturation state is for the detection of the load with the characteristics of the transformer, such as the magnetic field strength of the detected load and its relationship with the current value of the input load. For example, when the load reaches the magnetic
- the digital control system module outputs the corresponding The control signal adjusts the proportion of some working parameters of the circuit system to make the circuit system work in a better working state, thereby improving the conversion efficiency and working efficiency of the circuit system. If a sudden change in load is detected and an inductive current overshoot occurs, the current and voltage passed by the switching device in the circuit system will also generate an abnormality (as shown in Figure 8). The occurrence of such an abnormality is not tolerated by the circuit system. Otherwise, It will have an adverse effect on the reliability of the circuit system operation.
- the digital control system module When such an abnormality is detected, the digital control system module outputs a corresponding control signal, and the circuit system will forcefully reduce the load power supply voltage and turn on the channel that consumes energy (such as the DC component consumption of the load, the capacitance absorption circuit in the conversion circuit). ), adjust the operating frequency of the circuit system, etc., to ensure that such anomalies occur as soon as possible.
- energy such as the DC component consumption of the load, the capacitance absorption circuit in the conversion circuit.
- the converter inverter module is a functional module for receiving DC to AC, which is used to receive the rectification filter of the input end and the DC signal of the parameter detection module, and according to the control command issued by the digital control system module (such as conversion frequency, conversion time point, conversion time)
- the control command such as width
- the switching device driving module is connected between the digital control system module and the converter inverter module, and is configured to control the working state of the converter inverter module by receiving a switching signal generated by the digital control system module; to ensure the working of the circuit system Stability and reliability, the switching device driving module electrically isolates the driving signal of the input terminal for driving the switching device, and then drives the switching device to work, as shown in FIG. 9; the digital control system module also applies voltage to the driving module Parameters such as current, phase, temperature, etc., because these parameters are very important for the operation of the electronic converter circuit system. When a change of a certain parameter exceeds a certain threshold, the digital control system module outputs a corresponding control signal, so that The circuit system is in a safe, efficient working condition.
- the digital control system module is a digital control platform combining hardware circuit and software built around a digital control chip, and has various control modes such as single-ended, push-pull, half-bridge and full-bridge. Simple setup allows the circuitry to operate in the appropriate control mode.
- the digital control system module comprises: a control center module, a parameter receiving and control enabling module, an input module and a display module both connected to the control center module, as shown in FIG. 3; the control center module is a control of the entire electronic converter circuit system Core, data convergence point and computing center, hardware circuit and software control system composed of MCU or DSP as the main digital control chip, including system operation core module, data acquisition module and data drive output module connected to system operation core module , input and display data processing module and data storage module, as shown in Figure 4.
- the system computing core module is used as a data convergence point and a computing center; the data acquisition module is configured to receive various parameter signals, such as parameter signals of each module and load; and the data driving output module is used to generate a control converter inverter module and a switching device driver.
- the working signals of circuit modules such as modules; input and display data processing modules are mainly used to process data signals of input modules and display modules; data storage modules are mainly used for storage control modes (such as single-ended, push-pull, half-bridge and Data for various control modes such as full bridge and threshold parameters.
- the power input module is provided with a parameter detecting module
- the parameter detecting module includes a current detecting submodule, a voltage detecting submodule, a temperature detecting submodule, and a phase loss detecting submodule; each submodule is provided with a corresponding sensor for corresponding
- the parameters (such as the current input voltage of the power input module, the temperature of the main line, and whether the power input lacks equal parameters) are transmitted to the parameter receiving and control enabling module of the digital control system module.
- the parameter detected by the parameter detecting module includes an input voltage/current ripple of the power input module, a phase sequence of the output voltage, a phase point of the output voltage, a rate of change, a frequency, a ripple, a surge, and a power input. Module temperature, etc.
- the power factor adjustment module is provided with a signal parameter acquisition module for collecting electrical signal parameters, and the signal parameter acquisition module transmits the collected electrical signal parameters to the parameter receiving and control enabling module of the digital control system module.
- the electrical signal parameters include an AC voltage signal V AC at the input of the power factor adjustment module, an AC current signal I AC , a DC voltage signal V DC at the output of the power factor adjustment module, a ground signal GND, and a switching circuit in the power factor adjustment module.
- the first switching loop current parameter I Q1 and the second switching loop current parameter I Q2 are a current parameter flowing through the first switch tube Q1 in the power factor adjustment module, and the second switch loop current parameter I Q2 is a second switch tube Q2 flowing through the power factor adjustment module.
- the current parameters are shown in Figure 5.
- the power supply module of the control system is connected to the digital control system module for supplying power to the digital control system module.
- the power supply module of the control system is further connected with the driving device of the switching device for powering the driving module of the switching device.
- the power supply module of the control system includes a rectifying unit, a high frequency converting unit and a packet coupling output unit which are sequentially connected.
- the DC voltage outputted by the group coupled output unit has a plurality of groups. In this embodiment, the output DC voltage is +3.3V. Four groups of +5V, +12V and +24V, as shown in Figure 6; of course, other voltage outputs can be set as needed, which are not listed here.
- the rectifying unit is connected to an input end of the rectifying filter and the parameter detecting module for accessing an alternating voltage; the group coupled output unit is connected to the digital control system module and the switching device driving module, and is used for driving the digital control system module and the switching device.
- the module is powered.
- the emergency stop power controller is connected in series between the power factor adjustment module and the rectification filter and the parameter detection module for forcibly powering off the electronic converter circuit system in an emergency situation.
- the main component that constitutes the emergency stop power controller is the AC contactor, and its control terminal is a weak current control mode. In an emergency, the AC contactor can be used to forcibly cut off the power of the electronic converter circuit system.
- the environmental parameter acquisition module detects the environmental parameters
- the environmental parameter acquisition module is connected to the digital control system module, and the environmental parameter acquisition module comprises a temperature and humidity tester, an altimeter and a gauss meter for detecting environmental parameters such as temperature, humidity, altitude and electromagnetic field strength, respectively.
- the humidity tester, altimeter and gauss meter have a communication interface for communicating with the digital control module, and transmitting the detected data to the parameter receiving and control enabling module of the digital control system module.
- the detection of environmental parameters in the environmental parameter acquisition module may be selected according to specific needs, such as detecting only one of temperature, humidity, and electromagnetic field strength. Or several types of testing at the same time, the corresponding test instruments are also configured according to actual needs; similarly, the parameters detected by the load detection module, the parameter detection module in the power input module, and the signal parameter acquisition module in the power factor adjustment module are the same. in this way.
- the electronic converter circuit system provided by the invention solves the hardware circuit module such as the environment parameter acquisition module, the load detection module, the parameter detection module in the power input module, the signal parameter acquisition module in the power factor adjustment module, and the like.
- the circuit system is affected by factors such as environmental parameters, load changes, abnormalities in the electrical parameters of the power supply system itself, etc., resulting in unstable performance of the circuit system, low conversion efficiency, and the like.
- the control capability of the load effectively avoids the electromagnetic energy generated by the circuit system during the high-frequency switching work and causes electromagnetic pollution to the surrounding environment.
- the circuit system is also equipped with a cooling system.
- the cooling system is an external device that cooperates with an electronic converter circuit system with a communication network interface for data exchange with the electronic converter circuitry. For example, parameters such as cooling capacity control of the cooling system, internal and external temperature detection, and flow control of the cooling carrier can be performed with the digital control system of the electronic converter.
- the cooling system may be a heat-dissipating cooling method using an air-cooling method (such as a cooling fan), a liquid cooling method (including direct cooling or indirect cooling) or a cooling method (ie, providing a low-temperature heat source to the high-temperature heat source, so that The temperature is controlled, and the cooling system such as refrigerant phase change refrigeration can be mainly used here.
- an air-cooling method such as a cooling fan
- a liquid cooling method including direct cooling or indirect cooling
- a cooling method ie, providing a low-temperature heat source to the high-temperature heat source, so that The temperature is controlled, and the cooling system such as refrigerant phase change refrigeration can be mainly used here.
- the temperature of the cooling target reaches a set temperature that needs to be cooled
- the steps of the control method based on the above electronic converter circuit system provided by the present invention include:
- Step a obtaining and detecting environmental parameters, determining whether the electronic converter circuit system works within a safe range, and if so, directly entering the next step; if not, prompting the user that the electronic converter circuit system is in an unsafe environment
- step a Since the source of the control signal of the analog device in the circuit system is affected by environmental parameters, such as temperature and humidity, altitude, surrounding electromagnetic field, energy source and load, the performance of the entire circuit system will change. Therefore, it is necessary to detect the environmental parameters. .
- the environmental parameters include the humidity, temperature, altitude and electromagnetic field strength of the environment in which the electronic converter circuit system is located.
- the data is completed by a dedicated test sensor, such as a digital display temperature and humidity tester, an altimeter, a Gauss meter, etc. with a communication interface.
- the instrument transmits the detected data to the digital control system module, and is operated by an algorithm inside the digital control system module.
- Step 1 Set a threshold parameter for protecting the electronic converter circuit system in the digital control system module; the threshold parameter includes a peak voltage and a peak current of the converter inverter module during the conversion process, and a maximum operating temperature of each module.
- the detection parameter when the circuit system is in an abnormal state includes phase loss detection, low voltage detection, and output short circuit detection.
- the maximum current threshold is 40A
- the maximum voltage threshold is 650V
- the loop circuit storage capacity threshold is 12000Q
- the temperature protection threshold of each important protection device is 40-110 °C
- the threshold is 35KW.
- Each threshold parameter is set and saved in the data storage module of the digital control system module according to different circuit control modes (such as single-ended, push-pull, half-bridge, and full-bridge).
- circuit control modes such as single-ended, push-pull, half-bridge, and full-bridge.
- the upper limit of the power input module in the circuit system is set to 420V
- the lower limit of the voltage is set to 208V; when it is detected that the voltage value of the power input module deviates from the set upper and lower limit values, the circuit system protection state is entered, and the operation is stopped.
- the cooling system is an external device equipped with a circuit system, which is provided with a communication network interface, and can communicate with the circuit system and data feedback.
- the workflow is as shown in FIG. First, the temperature setting of each module needs to be performed on the cooling system.
- the driving system is started, and the cooling system is based on the cooling demand and the cooling capacity. Cooling, and timely communication and data feedback with the circuit system; if the cooling requirements of the circuit system are met, the cooling is completed, and the cooling system is turned off; if the cooling requirement of the circuit system cannot be achieved, the temperature of the circuit module cannot be lowered. The warning will be given and the circuit system will stop working.
- Step 2 Detect the electrical parameters of each module and the load, and transmit the electrical parameters to the digital control system module.
- the electrical parameters of each module and the load include one or more of the following:
- Input voltage ripple of the power input module phase sequence of the output voltage, phase point of the output voltage, rate of change, frequency, ripple, surge, etc.
- the switching device drives the voltage, current, phase, temperature, and frequency characteristics of the load, magnetic saturation, and temperature. These electrical parameters are very important for the operation of the electronic converter circuit system. At least one electrical parameter of each module and load is transmitted to the digital control system module for detection and analysis. The parameters such as the frequency characteristics of the detected load, the magnetic saturation state, and the load temperature are transmitted to the digital control system module. In addition, when the load is at different operating frequencies, the digital control system module also predicts the trend of the frequency characteristic value of the load; transmits the detected magnetic saturation state of the load and the load temperature parameter to the digital control system module for digitization. The control system module outputs corresponding control commands accordingly.
- the digital control system module outputs the corresponding control command. Adjusting the proportion of some operating parameters of the circuit system to make the circuit system work in a better working state, improving the conversion efficiency and working efficiency of the circuit system.
- Step 3 The digital control system module receives and detects the electrical parameter; after receiving all the parameters, selecting an operation model matching the hardware circuit in the digital control system module (the operation model can be implemented by a corresponding software algorithm), and digitally controlling The system module outputs corresponding control commands according to the received data. For example, in the bridge circuit, the result is automatically calculated and the corresponding control command is output, so that the upper and lower bridge arms are avoided from being simultaneously turned on. In the single-tube series resonant circuit, When the voltage is too high, the digital control system module controls the load output power in time to reduce the risk of excessive voltage in the inverter part.
- Step 4 Output a control command that satisfies the stability requirement to ensure that the electronic converter circuit system operates in a stable state; the steady state is that the electronic converter circuit system operates within a set threshold parameter range.
- Step 5 The electronic converter circuit system starts to start, and the power required for the load is gradually reached by stepping the power less than the preset value X; here, the preset value X may be between 10W and 50W, preferably, the pre-prediction here Set the value X to 30W.
- the preset value X may be between 10W and 50W, preferably, the pre-prediction here Set the value X to 30W.
- Step 6 Real-time detection and determination of whether the parameters of the electronic converter circuit system are abnormal. If abnormal, the electronic converter circuit system is protected. When the parameters are normal, the electronic converter circuit system continues to work.
- Step 7 When the electronic converter circuit system enters the end state, the power is gradually reduced to 0 by the power less than the preset value X. Accordingly, the preset value X here is 30W, and the conversion strength is gradually reduced. Avoid electromagnetic compatibility problems with upstream and downstream circuits.
- Step 8 If an emergency occurs during the operation of the electronic converter circuit system, the electronic converter circuit system is forcibly powered off by controlling the emergency stop power controller.
- the step 6 there are usually two abnormal states of the parameters of the circuit system, one is a frequently occurring abnormality or an abnormality that the circuit system cannot tolerate, and the real-time scanning method is used for detecting, and the other is a cumulative abnormality or A system with a wide tolerance is detected by triggering the response.
- the circuit system When the circuit system is abnormal, first protect the core components (such as switching devices, freewheeling diodes, storage capacitors, energy storage inductors, etc.), wait for the parameters to be normal before starting to accelerate the work, to ensure that the overall is not affected.
- the core components such as switching devices, freewheeling diodes, storage capacitors, energy storage inductors, etc.
- FIG. 7 it is a schematic diagram of a transient short circuit overvoltage state generated when a switching device is turned on and off in a circuit system, which is an abnormality with a cumulative abnormality or a wide system tolerance, when the voltage and current sensors in the circuit system acquire relevant
- the signal is fed back to the digital control system module, and the digital control system module adjusts the time node on or off to achieve flexible control, thereby avoiding a hard shutdown.
- FIG. 8 a schematic diagram of the current and voltage states of the switching device when the load is abrupt, and the inductive current overshoot occurs, which is an abnormality often occurring in the system or an abnormality that the circuit system cannot tolerate.
- the circuit system will adopt a mandatory reduction of the load supply voltage, open the channel that consumes energy (such as the DC component consumption of the load, the capacitance absorption circuit in the conversion circuit), adjust the operating frequency of the circuit system, and ensure the next Eliminate such anomaly immediately during the cycle.
- each circuit module in the circuit system is provided with a parameter monitoring point, and each conversion function link is controllable and is passed through a digital control system module.
- the result of the software operation is controlled.
- the hardware is used for feedback.
- the implementation of the present invention is more flexible and the circuit is more compact.
- Advantageous effects of the present invention include:
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Abstract
Description
Claims (17)
- 一种电子转换器电路系统,其特征在于,所述电路系统包括:电源输入模块、滤波模块、功率因数调整模块、整流滤波及参数检测模块、转换器逆变模块、开关器件驱动模块、数字化控制系统模块以及控制系统供电模块;所述电源输入模块与用于供电的电源连接,作为电路系统的输入端;所述滤波模块与电源输入模块连接,用于对电源输入模块的输出信号进行滤波处理;所述功率因数调整模块与滤波模块连接,用于对滤波模块的输出信号进行处理,以调整并提高系统的功率因数;所述整流滤波及参数检测模块与功率因数调整模块连接,用于对功率因数调整模块的输出信号进行整流滤波处理后输送至转换器逆变模块,同时检测电性参数并通过对应的传感器反馈至数字化控制系统模块;所述转换器逆变模块的输入端与整流滤波及参数检测模块连接,转换器逆变模块的输出端与负载连接;所述开关器件驱动模块连接于数字化控制系统模块与转换器逆变模块之间,用于通过接收数字化控制系统模块产生的开关信号来控制转换器逆变模块的工作状态;所述控制系统供电模块与数字化控制系统模块连接,用于为数字化控制系统模块供电。
- 根据权利要求1所述的电子转换器电路系统,其特征在于:所述负载与转换器逆变模块之间还设置有用于检测负载的频率特性、磁饱和状态和/或负载温度的负载检测模块。
- 根据权利要求1或2所述的电子转换器电路系统,其特征在于:所述的电子转换器电路系统还设置有与数字化控制系统模块连接的环境参数获取模块;所述的环境参数获取模块至少包括有温湿度测试仪、高度计或高斯计中的一种测试仪。
- 根据权利要求3所述的电子转换器电路系统,其特征在于:所述电源输入模块设置有参数检测模块,该参数检测模块包括电流检测子模块、电压检测子模块、温度检测子模块以及缺相检测子模块;各子模块设置有对应的传感器,用于将对应的参数传送给数字化控制系统模块的参数接收及控制使能模块。
- 根据权利要求4所述的电子转换器电路系统,其特征在于:所述的功率因数调整模块设置有采集电性信号参数的信号参数采集模块,该信号参数采集模块将采集所得的电性信号参数传送至数字化控制系统模块的参数接收及控制使能模块。
- 根据权利要求5所述的电子转换器电路系统,其特征在于:所述电性信号参数包括功率因数调整模块输入端的交流电压信号V AC 、交流电流信号I AC , 功率因数调整模块输出端的直流电压信号V DC 、接地信号GND以及功率因数调整模块中开关回路中的第一开关回路电流参数I Q1 与第二开关回路电流参数I Q2 。
- 根据权利要求5所述的电子转换器电路系统,其特征在于:所述的电子转换器电路系统还设置有急停电源控制器,用于在紧急情况下对电子转换器电路系统进行强制性断电。
- 根据权利要求7所述的电子转换器电路系统,其特征在于:所述的急停电源控制器串联连接于功率因数调整模块与整流滤波及参数检测模块之间;所述负载为电网或固定负载。
- 根据权利要求5所述的电子转换器电路系统,其特征在于,所述数字化控制系统模块包括:控制中心模块、均与控制中心模块连接的参数接收及控制使能模块、输入模块以及显示模块。
- 根据权利要求5所述的电子转换器电路系统,其特征在于:所述的开关器件驱动模块将输入端用于驱动开关器件的驱动信号进行电气隔离后,再驱动开关器件工作。
- 根据权利要求10所述的电子转换器电路系统,其特征在于:所述控制系统供电模块包括依次连接的整流单元、高频转换单元以及分组耦合输出单元;所述整流单元与整流滤波及参数检测模块的输入端连接,所述分组耦合输出单元与数字化控制系统模块连接,分组耦合输出单元还与开关器件驱动模块连接,用于为数字化控制系统模块连接与开关器件驱动模块供电。
- 一种电子转换器电路系统的控制方法,应用于如权利要求4-11中任一项所述的电子转换器电路系统中,所述方骤包括:步骤1、在数字化控制系统模块中设置用以保护电子转换器电路系统的门限参数;步骤2、检测各模块以及负载的电性参数,并将所述电性参数传送至数字化控制系统模块;步骤3、数字化控制系统模块接收并检测所述电性参数;步骤4、输出满足稳定性要求的控制指令,以确保电子转换器电路系统工作在稳定状态;步骤5、电子转换器电路系统开始启动,以步进小于预置值X的功率渐进式达到负载所需功率;步骤6、实时检测并判断电子转换器电路系统的各参数是否异常,若异常则对电子转换器电路系统进行保护,等待各参数正常时,电子转换器电路系统才继续工作;步骤7、电子转换器电路系统进入结束状态时,以步进小于预置值X的功率渐进式降低到0。
- 根据权利要求12所述的控制方法,其特征在于,所述控制方法在步骤1之前还包括:步骤a、电子转换器电路系统获取并检测环境参数,判断电子转换器电路系统是否工作在安全的范围内,若是,则进入下一步;若为否,则提示用户电子转换器电路系统处于工作不安全的环境中,并重复步骤a。
- 根据权利要求12或13所述的控制方法,其特征在于,所述控制方法还包括:步骤8、在电子转换器电路系统工作过程中若出现紧急情况,通过控制急停电源控制器使电子转换器电路系统强制性断电。
- 根据权利要求12所述的控制方法,其特征在于:步骤1所述的门限参数包括转换器逆变模块在转换过程中的峰值电压、峰值电流,各模块的最高工作温度以及电路系统非正常状态时的检测参数。
- 根据权利要求15所述的控制方法,其特征在于:所述电路系统非正常状态时的检测参数包括缺相检测、低电压检测以及输出短路检测中的一种或多种。
- 根据权利要求13所述所述的控制方法,其特征在于:步骤5与步骤7中所述的预置值X为30W;步骤a中所述的环境参数包括电子转换器电路系统所处环境的湿度、温度、海拔高度以及电磁场强度中的一种或多种。
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CN103218007B (zh) * | 2013-04-12 | 2015-04-08 | 刘昇澔 | 一种电子转换器电路系统及控制方法 |
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CN111243406B (zh) * | 2020-03-13 | 2022-03-08 | 安徽工业大学 | 一种数字式多功能电力电子技术实验方法 |
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CN115463895B (zh) * | 2022-09-19 | 2024-06-11 | 深圳市得康洗净电器有限公司 | 一种超声波清洗机数据云平台及其清洗设备 |
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