AC / DC programmable load control system

Abstract

The invention discloses an alternating-current and direct-current programmable load control system, relates to the technical field of power supply load control, and solves the technical problems that power supply parameters cannot be adjusted timely and accurately to adapt to load requirements, so that power supply output voltage fluctuation is large, and efficiency is reduced. The power supply data expectation identification unit calculates voltage and current values according to the Ohm's law and compares the voltage and current values with expected values so as to accurately determine whether the load resistance reaches the standard or not and build a foundation for power supply performance evaluation. Strategies such as series-parallel resistance adjustment, coil turn number adjustment or parallel capacitor construction resonance circuit and series-parallel capacitor adjustment are respectively implemented for resistance, inductance and capacitance loads, required element parameters are calculated according to an accurate formula, high-quality matching of the loads and a power supply is achieved, stable and efficient operation of the system is powerfully guaranteed, and the service life of the system is prolonged. And the application reliability and stability of AC / DC power supply equipment in various fields are enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of power supply load control, in particular to an AC / DC programmable load control system. Background Art

[0002] With the rapid development of electronic technology, AC and DC power supply equipment has been widely used in many fields, such as industrial automation, communications, computer equipment, new energy, etc. Different application scenarios have put forward strict requirements on the performance and stability of power supply equipment.

[0003] Publication No. CN108322069A discloses a three-phase current source power supply and load integrated control system. The system includes: a current source three-phase bridge, a drive circuit, a voltage and current detection unit, an A / D conversion unit and a main control unit; the voltage and current detection unit collects the two-phase voltage signal of the AC bus and the current signal of the DC bus in the current source three-phase bridge; the A / D conversion unit converts the collected voltage and current analog signals into digital signals and transmits them serially to the main control unit; the main control unit uses a DSP chip to generate PWM waves according to the collected voltage and current signals and control requirements to control the on and off of the switch tube.

[0004] Traditional power supply testing and load control methods often lack systematicity and precision, making it difficult to fully and effectively monitor and regulate AC and DC power supply equipment under complex and changeable working conditions. For example, when faced with dynamic changes in different types of loads, it is impossible to adjust power supply parameters in a timely and accurate manner to adapt to load requirements, resulting in large fluctuations in power supply output voltage and reduced efficiency, affecting the normal operation of electronic equipment connected to it, and may even damage the equipment. In addition, there is a lack of effective analysis and adjustment methods for the matching problem between load impedance and power supply output, making it difficult to ensure that the power supply operates in the best working state, thereby limiting the reliability and stability improvement of AC and DC power supply equipment in various fields. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an AC / DC programmable load control system, which solves the problem that power supply parameters cannot be adjusted timely and accurately to meet load requirements, resulting in large fluctuations in power supply output voltage and reduced efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: an AC / DC programmable load control system, comprising:

[0007] A load information acquisition unit, used to acquire the load resistance of the AC / DC power supply device, and transmit the acquired load resistance to the power supply data expected identification unit;

[0008] The power data expected identification unit is used to calculate the voltage and current of the AC and DC power supply equipment according to the load resistance transmitted by the load information acquisition unit, and compare and judge the calculated voltage and current with the expected value to generate an expected comparison result, and transmit the expected comparison result to the expected satisfaction analysis unit and the expected non-satisfaction analysis unit at the same time;

[0009] An expectation satisfaction analysis unit is used to analyze the acquired expectation satisfaction signal, generate a voltage judgment result by judging the stability of the output voltage within a time period, perform abnormal analysis on the unstable situation, generate load control information, and transmit the load control information to the load control information output unit;

[0010] The expectation failure analysis unit is used to analyze the acquired expectation failure signal, calculate the load impedance corresponding to the AC / DC power supply device, and compare the calculated load impedance with the preset impedance to generate a corresponding impedance comparison result, and transmit the comparison result to the load control analysis unit;

[0011] The load control analysis unit is used to analyze the comparison results obtained, make corresponding adjustments to the impedance adjustment signal based on different load types, and generate load control information. For the secondary analysis signal, the output power is analyzed and the load control information is generated by calculation according to the preset load, and then the load control information is transmitted to the load control information output unit.

[0012] The load control information output unit is used to display the acquired load control information to the corresponding operator.

[0013] As a further solution of the present invention, the specific manner in which the voltage data expected identification unit generates the expected comparison result is:

[0014] Obtaining a transmission circuit corresponding to the AC / DC power supply device, and simultaneously obtaining a load resistance corresponding to the transmission circuit, and obtaining a voltage value and a current value corresponding to the transmission circuit according to the load resistance analysis, and then comparing the obtained voltage value and current value with the corresponding expected values ​​respectively;

[0015] If the voltage value and the current value are the same as the expected value, it means that the current load resistance meets the expectations and generates a signal that meets the expectations. Otherwise, if any one of the voltage value or the current value is different from the expected value, it means that the current load resistance does not meet the expectations and generates a signal that does not meet the expectations.

[0016] As a further solution of the present invention, the specific manner in which the expectation satisfaction analysis unit analyzes the expectation satisfaction signal is:

[0017] Obtain the load current corresponding to the expected signal, and at the same time, identify the output voltage within the time period with time t as a period, calculate the fluctuation difference of the output voltage within the time period t, and then compare the obtained fluctuation difference with the preset value. If the fluctuation difference is greater than the preset value, it means that the voltage regulation rate of the AC / DC power supply device is abnormal, and an unstable analysis signal is generated. On the contrary, if the fluctuation difference is less than the preset value, it means that the voltage regulation rate of the AC / DC power supply device is normal, and a stable normal signal is generated. No processing is performed on the generated stable normal signal;

[0018] The obtained unstable analysis signal is analyzed, and the load characteristics, feedback parameters and power supply current limiting value of the AC and DC power supply equipment are analyzed to determine the cause of the abnormality.

[0019] As a further solution of the present invention, the specific manner in which the expectation satisfaction analysis unit analyzes the unstable analysis signal is:

[0020] Analyze the load characteristics of AC and DC power supply equipment, obtain the dynamic characteristics of different loads when the AC and DC power supply is started, and screen out abnormal equipment based on the dynamic characteristics. At the same time, control the corresponding abnormal equipment based on the load characteristics and generate load control information;

[0021] Analyze the feedback parameters of the AC and DC power supply equipment, obtain the feedback parameters of the AC and DC power supply, readjust the feedback adjustment parameters based on the characteristics of the power supply and the load, and generate load control information;

[0022] Analyze the power current limiting value of the AC and DC power supply equipment, obtain the load current and the corresponding current limiting value, compare the load current with the power current limiting value, adjust the current limiting setting of the power supply according to the actual demand of the load and the rated power of the power supply, and generate load control information.

[0023] As a further solution of the present invention, the specific manner in which the expectation failure analysis unit analyzes the expectation failure signal is:

[0024] The load impedance of the AC and DC power supply equipment is obtained, and the load type is judged at the same time. If the load is a pure resistive load, a resistive load result is generated; if the load type is an inductive load, an inductive load result is generated; if the load type is a capacitive load, a capacitive load result is generated, and the load impedance corresponding to different load types is calculated respectively;

[0025] Obtain the power supply voltage corresponding to the AC / DC power supply device, denoted as U, and the corresponding load current, denoted as I. Calculate the load impedance corresponding to the resistance load result. According to Ohm's law Z=R=U / I, calculate the corresponding load impedance Z. Calculate the load impedance corresponding to the inductive load result. According to the impedance formula Calculate the corresponding load impedance Z, where f is the power frequency and L is the inductance. Calculate the load impedance corresponding to the capacitive load result according to the impedance formula The corresponding load impedance Z is calculated, where C is the capacitance value;

[0026] At the same time, the calculated load impedance is compared with a preset value to generate a secondary analysis signal and an impedance adjustment signal.

[0027] As a further solution of the present invention, the specific manner in which the expected failure analysis unit compares the load impedance with the preset value is:

[0028] If the load impedance Z does not meet the preset value, an impedance adjustment signal is generated. Otherwise, if the load impedance Z meets the preset value, a secondary analysis signal is generated. The generated impedance adjustment signal and the secondary analysis signal are transmitted to the load control analysis unit at the same time.

[0029] As a further solution of the present invention, the load control analysis unit analyzes the impedance adjustment signal in the following specific manner:

[0030] The load corresponding to the resistance load result is adjusted according to the specific value of the load resistance. If the load resistance is too small, a series resistor is connected to increase the total resistance. Conversely, if the load resistance is too large, a parallel resistor is connected to reduce the total resistance, and corresponding load control information is generated;

[0031] The load corresponding to the inductive load result is adjusted. If the inductive load has a coil, reducing the number of coil turns can reduce the inductance value, so the number of turns is increased. If the inductive load does not have a coil, the resonant frequency and equivalent impedance can be adjusted by forming an LC parallel resonant circuit and changing the capacitance value. The appropriate capacitance value is calculated and selected according to the specific frequency and impedance requirements, and the load control information is generated;

[0032] The load corresponding to the capacitance load result is adjusted, the required capacitance value can be calculated according to the series-parallel formula of the capacitor, and the load control information is generated.

[0033] As a further solution of the present invention, the specific manner in which the load control analysis unit analyzes the secondary analysis signal is:

[0034] The transformer of the AC / DC power supply equipment is obtained, and the output voltage of the transformer is recorded as V out , and at the same time obtain the number of turns of the primary coil of the transformer and record it as N p And the number of turns of the secondary coil is recorded as N s , then substitute the obtained parameters into the formula Calculate the output voltage V in, further obtain the preset voltage and record it as Vy, change the ratio of the number of turns of the secondary coil to the number of turns of the primary coil, adjust the output voltage, and at the same time obtain the output voltage V out Substitute into the formula P out =V out I out Calculate the corresponding output current I out , and P out The output power is output, and the calculated output current is used as a standard to adjust and generate load control information.

[0035] The present invention provides an AC / DC programmable load control system. Compared with the prior art, it has the following beneficial effects:

[0036] The present invention can accurately obtain the load resistance through the load information acquisition unit, and the power supply data expected identification unit calculates the voltage and current values ​​according to Ohm's law and compares them with the expected values, so as to accurately determine whether the load resistance meets the standard, laying a solid foundation for power supply performance evaluation.

[0037] Secondly, when the load meets the expected signal, the expected satisfaction analysis unit can accurately judge the output voltage stability, promptly detect voltage regulation abnormalities, deeply analyze factors such as load characteristics, feedback parameters, and power supply current limiting values ​​to determine the root cause of the abnormality, and then generate adaptive load control information.

[0038] Third, when the load does not meet the expected signal, the expected non-satisfaction analysis unit can accurately calculate and classify the load impedance. The load control analysis unit implements series-parallel resistance adjustment, coil turns adjustment or parallel capacitor construction of resonant circuit, series-parallel capacitor adjustment and other strategies for resistance, inductance, and capacitance loads respectively, and calculates the required component parameters according to precise formulas to achieve high-quality matching between load and power supply, effectively ensuring stable and efficient operation of the system, and enhancing the reliability and stability of AC and DC power supply equipment in various fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a block diagram of the system principle of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] For example, see Figure 1The present application provides an AC / DC programmable load control system, including a load information acquisition unit, a power data expectation identification unit, an expectation satisfaction analysis unit, an expectation non-satisfaction analysis unit, a load control analysis unit and a load control information output unit.

[0042] The load information acquisition unit is used to acquire the load resistance of the AC / DC power supply equipment and transmit the acquired load resistance to the power supply data expected identification unit.

[0043] The power supply data expected identification unit is used to calculate the voltage and current of the AC and DC power supply equipment according to the acquired load resistance, and compare and judge the calculated voltage and current with the expected value to generate the expected comparison result, and transmit the expected comparison result at the same time.

[0044] Obtain a transmission circuit corresponding to an AC / DC power supply device, and simultaneously obtain a load resistance corresponding to the transmission circuit, and obtain a voltage value and a current value corresponding to the transmission circuit according to the load resistance analysis, and the voltage value and the current value are calculated by Ohm's law, and the specific formula is I=U / R, where I is current, U is voltage, and R is resistance. Then, the obtained voltage value and current value are compared with the corresponding expected values, and the expected values ​​include an expected voltage value and an expected current value, and the specific values ​​are set by the operator. If the voltage value and the current value are the same as the expected value, it means that the current load resistance meets the expectation, and a signal that meets the expectation is generated. On the contrary, if any one of the voltage value or the current value is different from the expected value, it means that the current load resistance does not meet the expectation, and a signal that does not meet the expectation is generated;

[0045] Then the prediction signal is transmitted to the expectation satisfaction analysis unit, and the expectation failure signal is transmitted to the expectation failure analysis unit.

[0046] An expectation satisfaction analysis unit is used to analyze the acquired expectation satisfaction signal, generate a voltage judgment result by judging the stability of the output voltage within a time period, perform abnormal analysis on unstable conditions, generate load control information, and transmit the load control information to the load control information output unit.

[0047] Obtain the load current corresponding to the expected signal, and at the same time, identify the output voltage within the time period with time t as a period, calculate the fluctuation difference of the output voltage within the time period t, and then compare the obtained fluctuation difference with the preset value, and the specific value of the preset value is set by the operator. For example, within a time period of 10 seconds, the maximum value of the output voltage collected is 12.5 volts, and the minimum value is 11.8 volts. The fluctuation difference obtained by further calculation is 0.7 volts. Assuming that the preset value set by the operator is 0.5 volts, if the fluctuation difference is greater than the preset value, it means that the voltage regulation rate of the AC / DC power supply device is abnormal. Since the calculated fluctuation difference of 0.7 volts is greater than the preset value of 0.5 volts, it indicates that the voltage regulation rate of the AC / DC power supply device under the current load condition is abnormal, and an unstable analysis signal is generated. On the contrary, if the fluctuation difference is less than the preset value, for example, the fluctuation difference is 0.3 volts, which is less than the preset 0.5 volt, it means that the voltage regulation rate of the AC / DC power supply device is normal, and a stable normal signal is generated, and no processing is performed on the generated stable normal signal;

[0048] Analyze the obtained unstable analysis signal, analyze the load characteristics, feedback parameters and power supply current limit value of the AC and DC power supply equipment, and determine the cause of the abnormality;

[0049] Analyze the load characteristics of AC and DC power supply equipment, obtain the dynamic characteristics of different loads when the AC and DC power supply is started, and screen out abnormal devices based on the dynamic characteristics. For example, some electronic equipment will experience a sharp change in current at the moment of startup or during operation, which may cause power supply voltage fluctuations. At the same time, control the corresponding abnormal devices based on the load characteristics and generate load control information. For loads with large starting current, consider adding a soft start circuit.

[0050] The feedback parameters of the AC and DC power supply equipment are analyzed to obtain the feedback parameters of the AC and DC power supply, and the feedback adjustment parameters are readjusted based on the characteristics of the power supply and the load, and load control information is generated. Specifically, the parameters can be adjusted through the PID controller.

[0051] Analyze the power supply current limit value of the AC / DC power supply equipment, obtain the load current and the corresponding current limit value, and compare the load current with the power supply current limit value. According to the actual demand of the load and the rated power of the power supply, reasonably adjust the current limit setting of the power supply. At the same time, the maximum output current rating of the power supply cannot be exceeded during adjustment, and load control information is generated. For example, for a power supply with a rated output current of 5A, when connected to a load with a normal working current of 3A, if the current limit is set to 3.2A, it may cause unnecessary voltage fluctuations. At this time, the current limit value can be appropriately increased to about 4A.

[0052] The generated load control information is transmitted to the load control information output unit.

[0053] A load control information output unit is used to display the acquired load control information to the corresponding operator.

[0054] Embodiment 2: This embodiment is implemented on the basis of Embodiment 1, and the difference from Embodiment 1 is as follows:

[0055] An expectation-unsatisfied analysis unit is used to analyze the acquired expectation-unsatisfied signal, calculate the load impedance corresponding to the AC / DC power supply equipment, and compare the calculated load impedance with the preset impedance to generate a corresponding impedance comparison result, and transmit the comparison result to the load control analysis unit.

[0056] The load impedance of the AC and DC power supply equipment is obtained, and the load type is judged at the same time. If the load is a pure resistive load, a resistive load result is generated; if the load type is an inductive load, an inductive load result is generated; if the load type is a capacitive load, a capacitive load result is generated, and the load impedance corresponding to different load types is calculated respectively;

[0057] Get the power supply voltage corresponding to the AC / DC power supply device, record it as U, and the corresponding load current as I. Calculate the load impedance corresponding to the resistance load result. According to Ohm's law Z=R=U / I, calculate the corresponding load impedance Z. For example, if the power supply voltage is 10V and the load current is 2A, then according to Ohm's law, the theoretical impedance Z is 5Ω. Calculate the load impedance corresponding to the inductive load result. According to the impedance formula The corresponding load impedance Z is calculated, where f is the power frequency and L is the inductance. The power frequency f = 50Hz, the angular frequency w = 2πf = 100π, and the measured inductance is 31.8mH. Assuming that the resistance component can be ignored, the corresponding impedance Z = 10Ω is calculated according to the formula. The load impedance corresponding to the capacitive load result is calculated according to the impedance formula The corresponding load impedance Z is calculated, where C is the capacitance value; for example, the capacitance C at a specific frequency f=100 Hz (angular frequency w=200π) is 31.8 μF, and the impedance Z=50Ω is calculated according to the formula.

[0058] The calculated load impedance Z is compared with the preset value. If the load impedance Z does not meet the preset value, an impedance adjustment signal is generated. Conversely, if the load impedance Z meets the preset value, a secondary analysis signal is generated. At the same time, the generated impedance adjustment signal and the secondary analysis signal are transmitted to the load control analysis unit.

[0059] The load control analysis unit is used to analyze the comparison results obtained, make corresponding adjustments based on different load types for the impedance adjustment signal, and generate load control information. For the secondary analysis signal, the output power is analyzed and the load control information is generated by calculation according to the preset load, and then the load control information is transmitted to the load control information output unit.

[0060] Analyze the impedance adjustment signal obtained, and analyze it in combination with the load type, and adjust the load corresponding to the resistance load result. Adjust it according to the specific value of the load resistance. If the load resistance is too small, you can connect a resistor with an appropriate resistance in series to increase the total resistance. The series formula is R 总 =R1+R2, and here it is represented by R 总 Preset value, R1 is the calculated load impedance, R2 is the required series impedance, conversely, if the load resistance is too large, a resistor can be connected in parallel to reduce the total resistance, and the parallel formula is and generate corresponding load control information;

[0061] The load corresponding to the inductive load result is adjusted. For an inductive load with a coil, reducing the number of coil turns can reduce the inductance value, and increasing the number of turns can increase the inductance value. For an inductive load without a coil, an LC parallel resonant circuit is formed by connecting an appropriate capacitor in parallel at both ends of the inductive load. The resonant frequency and equivalent impedance can be adjusted by changing the capacitance value. When the capacitor and inductor resonate in parallel, the equivalent impedance of the circuit is the largest. The appropriate capacitance value can be calculated and selected according to the specific frequency and impedance requirements, and the load control information can be generated.

[0062] For example, the initial number of turns of a certain inductive load is 100 turns, and the inductance is 20mH. If the number of turns of the coil is reduced to 80 turns, according to the approximate proportional relationship between inductance and number of turns (when other conditions remain unchanged), the inductance value will be reduced to The inductance is 16mH. If the number of turns is increased to 120, the inductance value is increased by 24mH.

[0063] For inductive loads without coils, a parallel resonant circuit can be constructed by connecting capacitors in parallel at both ends to achieve the purpose of regulation. Assume that the inductance of the inductive load is 10mL, the power frequency is 50Hz, and according to the parallel resonant frequency formula When the desired resonant frequency is 100 Hz, the required parallel capacitance C=2.53 can be calculated.

[0064] Adjust the load corresponding to the capacitive load result. Similar to the inductive load, the capacitive load can also be adjusted by connecting capacitors in parallel or series. Connecting capacitors in parallel can increase the total capacitance value, while connecting capacitors in series can reduce the total capacitance value. The series-parallel formula C of the capacitor can be used to calculate the capacitance.总 =C1+C2 (in parallel) and (in series) calculate the required capacitance value and generate load control information;

[0065] Analyze the secondary analysis signal, obtain the transformer of the AC / DC power supply equipment, and obtain the output voltage of the transformer, which is recorded as V out , and at the same time obtain the number of turns of the primary coil of the transformer and record it as N p And the number of turns of the secondary coil is recorded as N s , then substitute the obtained parameters into the formula Calculate the output voltage V in , further obtain the preset voltage and record it as Vy, and adjust the output voltage by changing the ratio of the number of turns of the secondary coil to the number of turns of the primary coil. The preset voltage here is set by the operator according to the AC / DC power supply device itself, and the obtained output voltage V out Substitute into the formula P out =V out I out Calculate the corresponding output current I out , where P out is a known parameter, is the output power of the AC / DC voltage device, and is regulated based on the calculated output current to generate load control information;

[0066] The generated load control information is transmitted to the load control information output unit.

[0067] A load control information output unit is used to display the acquired load control information to the corresponding operator.

[0068] Embodiment 3, as the embodiment 3 of the present invention, focuses on combining the implementation processes of embodiment 1 and embodiment 2 for implementation.

[0069] Some of the data in the above formulas are dimensionless and numerically calculated. Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0070] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An AC / DC programmable load control system, characterized in that: include: The power data expected identification unit is used to calculate the voltage and current of the AC and DC power supply equipment according to the load resistance transmitted by the load information acquisition unit, and compare and judge the calculated voltage and current with the expected value to generate an expected comparison result, and transmit the expected comparison result to the expected satisfaction analysis unit and the expected non-satisfaction analysis unit at the same time; An expectation satisfaction analysis unit is used to analyze the acquired expectation satisfaction signal, generate a voltage judgment result by judging the stability of the output voltage within a time period, perform abnormal analysis on the unstable situation, generate load control information, and transmit the load control information to the load control information output unit; The expectation failure analysis unit is used to analyze the acquired expectation failure signal, calculate the load impedance corresponding to the AC / DC power supply device, and compare the calculated load impedance with the preset impedance to generate a corresponding impedance comparison result, and transmit the comparison result to the load control analysis unit; The load control analysis unit is used to analyze the comparison results obtained, make corresponding adjustments to the impedance adjustment signal based on different load types, and generate load control information. For the secondary analysis signal, the output power is analyzed and the load control information is generated by calculation according to the preset load, and then the load control information is transmitted to the load control information output unit.

2. The AC / DC programmable load control system according to claim 1, characterized in that: It also includes a load information acquisition unit and a load control information output unit; A load information acquisition unit, used to acquire the load resistance of the AC / DC power supply device, and transmit the acquired load resistance to the power supply data expected identification unit; The load control information output unit is used to display the acquired load control information to the corresponding operator.

3. The AC / DC programmable load control system according to claim 1, characterized in that: The specific manner in which the voltage data expected recognition unit generates the expected comparison result is: Obtaining a transmission circuit corresponding to the AC / DC power supply device, and simultaneously obtaining a load resistance corresponding to the transmission circuit, and obtaining a voltage value and a current value corresponding to the transmission circuit according to the load resistance analysis, and then comparing the obtained voltage value and current value with the corresponding expected values ​​respectively; If the voltage value and the current value are the same as the expected value, it means that the current load resistance meets the expectations and generates a signal that meets the expectations. Otherwise, if any one of the voltage value or the current value is different from the expected value, it means that the current load resistance does not meet the expectations and generates a signal that does not meet the expectations.

4. The AC / DC programmable load control system according to claim 1, characterized in that: The specific manner in which the expectation satisfaction analysis unit analyzes the expectation satisfaction signal is as follows: Obtain the load current corresponding to the expected signal, and at the same time, take time t as the period, calculate the fluctuation difference of the output voltage within the time period t, and compare it with the preset value. If the fluctuation difference is greater than the preset value, an unstable analysis signal is generated. Conversely, if the fluctuation difference is less than the preset value, a stable normal signal is generated. No processing is performed on the generated stable normal signal, and the unstable analysis signal is processed at the same time.

5. The AC / DC programmable load control system according to claim 4, characterized in that: The specific method in which the expectation satisfaction analysis unit analyzes the unstable analysis signal is: Analyze the load characteristics of AC and DC power supply equipment, obtain the dynamic characteristics of different loads when the AC and DC power supply is started, and screen out abnormal equipment based on the dynamic characteristics. At the same time, control the corresponding abnormal equipment based on the load characteristics and generate load control information; Analyze the feedback parameters of the AC and DC power supply equipment, obtain the feedback parameters of the AC and DC power supply, readjust the feedback adjustment parameters based on the characteristics of the power supply and the load, and generate load control information; Analyze the power current limiting value of the AC and DC power supply equipment, obtain the load current and the corresponding current limiting value, compare the load current with the power current limiting value, adjust the current limiting setting of the power supply according to the actual demand of the load and the rated power of the power supply, and generate load control information.

6. The AC / DC programmable load control system according to claim 1, characterized in that: The specific manner in which the expectation failure analysis unit analyzes the expectation failure signal is as follows: The load impedance of the AC and DC power supply equipment is obtained, and the load type is judged at the same time. If the load is a pure resistive load, a resistive load result is generated; if the load type is an inductive load, an inductive load result is generated; if the load type is a capacitive load, a capacitive load result is generated, and the load impedance corresponding to different load types is calculated respectively; Obtain the power supply voltage corresponding to the AC / DC power supply device, denoted as U, and the corresponding load current, denoted as I. Calculate the load impedance corresponding to the resistance load result. According to Ohm's law Z=R=U / I, calculate the corresponding load impedance Z. Calculate the load impedance corresponding to the inductive load result. According to the impedance formula Calculate the corresponding load impedance Z, where f is the power frequency and L is the inductance. Calculate the load impedance corresponding to the capacitive load result according to the impedance formula The corresponding load impedance Z is calculated, where C is the capacitance value; At the same time, the calculated load impedance is compared with a preset value to generate a secondary analysis signal and an impedance adjustment signal.

7. The AC / DC programmable load control system according to claim 6, characterized in that: The specific manner in which the expectation failure analysis unit compares the load impedance with the preset value is: If the load impedance Z does not meet the preset value, an impedance adjustment signal is generated. Otherwise, if the load impedance Z meets the preset value, a secondary analysis signal is generated. The generated impedance adjustment signal and the secondary analysis signal are transmitted to the load control analysis unit at the same time.

8. The AC / DC programmable load control system according to claim 1, characterized in that: The specific method in which the load control analysis unit analyzes the impedance adjustment signal is as follows: The load corresponding to the resistance load result is adjusted according to the specific value of the load resistance. If the load resistance is too small, a series resistor is connected to increase the total resistance. Conversely, if the load resistance is too large, a parallel resistor is connected to reduce the total resistance, and corresponding load control information is generated; The load corresponding to the inductive load result is adjusted. If the inductive load has a coil, reducing the number of coil turns can reduce the inductance value, so the number of turns is increased. If the inductive load does not have a coil, the resonant frequency and equivalent impedance can be adjusted by forming an LC parallel resonant circuit and changing the capacitance value. The appropriate capacitance value is calculated and selected according to the specific frequency and impedance requirements, and the load control information is generated; The load corresponding to the capacitance load result is adjusted, the required capacitance value can be calculated according to the series-parallel formula of the capacitor, and the load control information is generated.

9. The AC / DC programmable load control system according to claim 1, characterized in that: The specific method in which the load control analysis unit analyzes the secondary analysis signal is as follows: The transformer of the AC / DC power supply equipment is obtained, and the output voltage of the transformer is recorded as V out , and at the same time obtain the number of turns of the primary coil of the transformer and record it as N p And the number of turns of the secondary coil is recorded as N s , then substitute the obtained parameters into the formula Calculate the output voltage V in , further obtain the preset voltage and record it as Vy, change the ratio of the number of turns of the secondary coil to the number of turns of the primary coil, adjust the output voltage, and at the same time obtain the output voltage V out Substitute into the formula P out =V out I out Calculate the corresponding output current I out , and P out The output power is output, and the calculated output current is used as a standard to adjust and generate load control information.

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