A power chain control system device, control method and circuit board for a generator set

Abstract

The present invention provides a power chain control system device, control method and circuit board of a generator set, wherein the system device comprises an electrically connected control circuit unit, a power chain unit and a current conversion unit, wherein the control circuit unit comprises a power supply module, a current signal acquisition module, a DC voltage acquisition module, a speed sampling module, a signal processing module, a microcontroller module and a stepper motor drive module. The present invention can automatically adjust in real time according to the load, thereby obtaining a stable circulating oil supply to achieve a stable speed.

Description

Technical Field

[0001] The present invention belongs to the field of electric power, relates to a control circuit, and in particular to a power chain control system device, a control method and a circuit board of a generator set. Background Art

[0002] The power chain speed control circuit is the core of controlling the power generation equipment and system. It can make the circulating fuel supply of the engine automatically adjusted in real time according to the change of load, so as to ensure the stable speed of the engine output. For the power chain part of a power generation system, it can maintain a stable speed under different loads and operating conditions, so as to obtain a more stable power output capacity.

[0003] CN105971798A discloses a variable frequency starting circuit for an AC diesel locomotive diesel engine based on a four-quadrant converter. The four-quadrant converter rectifies and outputs the three-phase AC power emitted by the main generator to an intermediate DC link, and the four-quadrant converter inverts the voltage of the intermediate DC link and outputs it to the main generator for starting. In the four-quadrant converter, three chopper bridge arms in the traction converter module drive the traction motor to work, and the fourth chopper bridge arm of the second, third, and sixth traction converter modules adjusts the voltage and current output to charge the power battery, and the fourth chopper bridge arm of the first, fourth, and fifth traction converter modules adjusts the power consumption to the braking resistor.

[0004] CN110212824A discloses a direct high-voltage output doubly-fed switched reluctance generator conversion system, which consists of a battery, a conversion main circuit, an excitation charging and energy feeding circuit, and an output capacitor. The conversion main circuit consists of phase circuits of the same structure in which each phase winding is located, which are connected in parallel at both ends. Each phase circuit itself can directly and simultaneously realize functions such as high-voltage output and enhanced excitation. The excitation charging and energy feeding circuit simultaneously realizes several major functions of charging, excitation, and reverse energy feeding, and can be adjusted to obtain the charging excitation power quality and reverse feeding voltage, and isolate and decouple the power generation output from the excitation.

[0005] CN105840324A discloses an intelligent control circuit for a pressure reducing valve and a control method thereof, comprising a controller, a rectifier bridge, a valve conversion switch, a start button and a charging coil, wherein the valve conversion switch drives four micro switches to work when rotating, the controller is respectively connected to the LPG solenoid valve, the first micro switch, the second micro switch, the third micro switch, the fourth micro switch, the carburetor solenoid valve, the AVR and the flameout end of the high-voltage package, the charging coil is connected to the battery after passing through the rectifier bridge and the fourth micro switch, the positive pole of the starter motor relay is connected to the battery on the one hand, and is connected to the controller through the fourth micro switch on the other hand, and the negative pole of the starter motor relay is connected to the start button.

[0006] In general fuel power generation equipment, mechanical and hydraulic methods are generally used to adjust the fuel supply in order to achieve the purpose of controlling the engine speed stability. Since the process of adjusting the speed through mechanical components will result in speed deviation measurement and amplification, and it is difficult to adjust and control the complex control system, and it is even more difficult to meet the requirements of high precision and high automation programs. Therefore, there is a special need for a digital power chain speed control circuit with high automation programs and superior performance. This will be a hot spot and focus in the future. Summary of the invention

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide a power chain control system device, a control method and a circuit board for a generator set, which can automatically adjust in real time according to the load, so as to obtain a stable circulating oil supply to achieve a stable speed.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a power chain control system device for a generator set, the system device comprising an electrically connected control circuit unit, a power chain unit and a current conversion unit, the control circuit unit comprising a power supply module, a current signal acquisition module, a DC voltage acquisition module, a speed sampling module, a signal processing module, a microcontroller module and a stepper motor drive module;

[0010] The power supply module is electrically connected to the current signal acquisition module, the DC voltage acquisition module, the speed sampling module, the signal acquisition panel, the signal processing module and the stepper motor drive module for power supply; the current signal acquisition module and the DC voltage acquisition module are electrically connected to the current conversion unit for signal acquisition respectively; the speed sampling module is electrically connected to the power chain unit for signal acquisition; the signal processing module processes the acquired information and feeds the information back to the microcontroller module; the microcontroller module receives the information and issues instructions, thereby controlling the stepper motor drive module.

[0011] The power chain control system device of a generator set provided by the present invention can be automatically adjusted in real time according to the load, so as to obtain a stable circulating oil supply to achieve the purpose of stabilizing the speed. It can meet the control system of more complex working conditions and higher requirements according to multi-dimensional sensor information, improve the control accuracy and stability of the system, and has the advantage of precise control speed regulation.

[0012] It should be noted that the power chain unit in the present invention includes but is not limited to an execution module for receiving instructions from the control circuit unit, an engine for driving, and a generator for providing kinetic energy. The converter unit includes but is not limited to a low-voltage rectifier module for powering the control circuit unit, a high-voltage rectifier module for load demand, a low-voltage DC output module for outputting DC, and an inverter AC output 17 for outputting AC. The microcontroller module of the present invention sends instructions to the stepper motor drive module, so that the execution module of the power chain unit is activated, thereby controlling the power generation of the generator. The power chain control system device of the generator set provided by the present invention has a rotation speed of not less than 7000 revolutions per minute. The system device provided by the present invention solves the problems of limited speed sampling accuracy and small adjustment range caused by the high-speed running engine, and has the advantages of light weight and small size of the circuit itself.

[0013] It should also be noted that the present invention is suitable for a light fuel power generation equipment that has a power chain unit in which a micro high-speed gasoline engine and a multi-phase permanent magnet synchronous generator move coaxially, and then obtains high-quality AC power supply and DC power supply through a subsequent power electronic conversion unit.

[0014] As a preferred technical solution of the present invention, the power supply module includes a rectifier module, a DC step-down module and a voltage-stabilized power supply module connected in sequence, and the voltage-stabilized power supply module includes four output ends, and the output ends are respectively connected to the microcontroller module, the current signal acquisition module, the DC voltage acquisition module and the speed sampling module.

[0015] It should be noted that the voltage of the DC step-down module in the present invention is input from the input end of the voltage-stabilized power supply module, and is output to the microcontroller module, current signal acquisition module, DC voltage acquisition module and speed sampling module respectively through the output end of the voltage-stabilized power supply module.

[0016] Preferably, the DC step-down module is electrically connected to the signal processing module and the stepper motor driving module.

[0017] Preferably, the DC step-down module comprises a step-down conversion circuit, and the step-down conversion circuit is used for input voltage and output voltage.

[0018] Preferably, the input voltage range is 5 to 35 V DC, for example, it can be 5V, 8V, 10V, 12V, 15V, 20V, 22V, 25V, 26V, 30V or 35V, but is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, and 12 to 26V is further preferred.

[0019] Preferably, the output voltage range is 3.3-12V DC, for example, 3.3V, 3.5V, 5V, 6V, 7V, 8V, 9V, 10V, 11V or 12V, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable, more preferably 5-12V.

[0020] Preferably, the voltage-stabilized power supply module includes an open-circuit power supply and / or a linear voltage-stabilized power supply.

[0021] Preferably, the output voltage stabilization range of the voltage-stabilized power supply module is 2.7 to 5V, for example, it can be 2.7V, 2.8V, 3V, 3.3V, 3.5V, 3.8V, 4V, 4.3V, 4.5V or 5V, but is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, and 3.3 to 5V is further preferred.

[0022] As a preferred technical solution of the present invention, the rectifier module includes at least one rectifier bridge stack or at least one power diode.

[0023] It should be noted that when the rectifier module in the present invention includes a plurality of rectifier bridge stacks or a plurality of power diodes, the rectifier bridge stacks or the power diodes can be connected in series or in parallel by building a bridge circuit.

[0024] Preferably, the rectifier bridge stack includes a half-bridge rectifier bridge stack and / or a full-bridge rectifier bridge stack.

[0025] Preferably, the voltage limit of the half-bridge rectifier bridge stack and the full-bridge rectifier bridge stack is independently 50-1000V, for example, it can be 50V, 100V, 200V, 400V, 600V, 800V or 1000V, but it is not limited to the listed values. Other unlisted values ​​within the numerical range are also applicable, and it is further preferably 50-400V.

[0026] Preferably, the power diode includes at least one rectifier diode.

[0027] Preferably, the power diode comprises at least two types of rectifier diodes connected in series and parallel.

[0028] Preferably, the rectifier diode has a voltage limit of 50 to 1000 V, for example, 50 V, 100 V, 200 V, 400 V, 600 V, 800 V or 1000 V, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0029] As a preferred technical solution of the present invention, the current signal acquisition module includes a first current acquisition module and a second current acquisition module, one end of the first current acquisition module and the second current acquisition module are respectively and independently electrically connected to the conversion unit, and the other end is respectively and independently electrically connected to the signal processing module, and the first current acquisition module and the second current acquisition module are respectively used to collect the current signal in the conversion unit and transmit it to the signal processing module.

[0030] Preferably, the first current acquisition module and the second current acquisition module respectively and independently include a Hall device, a resistor device and a capacitor device which are electrically connected, and the Hall device, the resistor device and the capacitor device are used for signal acquisition.

[0031] As a preferred technical solution of the present invention, one end of the DC voltage acquisition module is electrically connected to the converter unit, and the other end is connected to the microcontroller module; one end of the speed sampling module is electrically connected to the power chain unit, and the other end is connected to the microcontroller module.

[0032] Preferably, the DC voltage acquisition module includes a first optocoupler, a first resistor component, a first capacitor component, a first diode and a first TVS tube, and the first optocoupler, the first resistor component, the first capacitor component, the first diode and the first TVS tube are used to collect the voltage signal in the conversion unit.

[0033] Preferably, the speed sampling module includes a second optocoupler, a second resistor component, a second capacitor component, a second diode and a second TVS tube, and the second optocoupler, the second resistor component, the second capacitor component, the second diode and the second TVS tube are used to obtain the speed signal in the power chain unit.

[0034] Preferably, the system device further comprises a temperature acquisition module, one end of the temperature acquisition module is electrically connected to the power chain unit, and the other end of the temperature acquisition module is connected to the signal processing module.

[0035] Preferably, the temperature acquisition module comprises a temperature sensor, a third resistor component and a third capacitor component. The temperature sensor acquires the temperature signal of the power chain unit and transmits the temperature signal to the signal processing module via the third resistor component and the third capacitor component.

[0036] Preferably, the system device further comprises a communication module electrically connected to the microcontroller module, and the communication module and the microcontroller module perform serial output.

[0037] As a preferred technical solution of the present invention, the signal processing module includes an operational amplifier, a fourth resistor component, a fourth capacitor component and a third TVS tube, and the operational amplifier, the fourth resistor component, the fourth capacitor component and the third TVS tube are used for signal processing.

[0038] It should be noted that the signal processing module in the present invention includes an operational amplifier, a fourth resistor component, a fourth capacitor component and a third TVS tube, which form a combination cascade of one or at least two in-phase and / or inverting proportional amplification circuits, receives information from the first current acquisition module, the second current acquisition module and the temperature acquisition module, and transmits it to the microcontroller module after processing.

[0039] Preferably, the stepper motor driving module includes a chip driving plate or a discrete component plate.

[0040] It should be noted that the chip drive section in the present invention is composed of a motor drive chip and peripheral resistors and capacitors, and the discrete component section is composed of a Darlington tube, a power triode and resistors and capacitors.

[0041] Preferably, the microcontroller module includes an eight-bit digital control chip and / or a sixteen-bit digital control chip, and more preferably an eight-bit digital control chip.

[0042] It should be noted that when the system device provided by the present invention controls a high-speed gasoline generator set, it obtains the required amount of circulating oil by precisely controlling the stepper motor according to the real-time working conditions. It first measures the engine speed, load output current, DC bus output, low-voltage DC voltage and engine temperature. The microcontroller unit makes a comprehensive decision based on the host computer instructions and feedback signals, and then controls the movement of the stepper motor through the stepper motor drive module.

[0043] In a second aspect, the present invention provides a power chain control method for a generator set, wherein the method adopts the system device described in the first aspect, and the method comprises:

[0044] The control circuit unit collects signals from the power chain unit and the converter unit respectively, generates instructions after processing, and then controls the stepper motor drive module.

[0045] As a preferred technical solution of the present invention, the method comprises:

[0046] The control circuit unit collects the first signal, the second signal and the third signal respectively, and processes the first signal, the second signal and the fifth signal. The processed first signal, the second signal and the third signal are fed back to the microcontroller module to generate instructions.

[0047] Preferably, the first signal is a load current signal of the current conversion unit.

[0048] Preferably, the second signal is a bus current signal of the conversion unit.

[0049] Preferably, the third signal is a temperature signal of the power chain unit.

[0050] As a preferred technical solution of the present invention, the method described includes: the control circuit unit respectively collects the fourth signal of the power chain unit and the fifth signal of the conversion unit, and feeds back the fourth signal and the fifth signal to the microcontroller module to generate instructions.

[0051] Preferably, the fourth signal is a low-voltage AC voltage signal of the power chain unit.

[0052] Preferably, the fifth signal is an output voltage signal of the conversion unit.

[0053] Preferably, the method further comprises: in the process of power chain regulation, the voltage-stabilized power supply module supplies power to the first current acquisition module, the second current acquisition module, the DC voltage acquisition module, the speed sampling module and the microcontroller module.

[0054] In a third aspect, the present invention provides a circuit board, wherein the circuit board includes the system device described in the first aspect.

[0055] The system refers to an equipment system, a device system or a production device.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] The present invention provides a power chain control system device, a control method and a circuit board for a generator set, which can be automatically adjusted in real time according to the load, so as to obtain a stable circulating oil supply to achieve a stable speed. The control system can meet more complex working conditions and higher requirements based on multi-dimensional sensor information, improves the control accuracy and stability of the system, and has the advantage of precise control and speed regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 A schematic diagram of a power chain control system device for a generator set provided in a specific embodiment of the present invention;

[0059] Figure 2 A circuit diagram of a power module provided in a specific embodiment of the present invention;

[0060] Figure 3 A circuit diagram of a current signal acquisition module provided in a specific embodiment of the present invention;

[0061] Figure 4A circuit diagram of a speed sampling module provided in a specific embodiment of the present invention;

[0062] Figure 5 A circuit diagram of a signal processing module provided for a specific embodiment of the present invention;

[0063] Figure 6 A circuit diagram of a stepper motor drive module provided in a specific embodiment of the present invention;

[0064] Figure 7 A circuit diagram of a microcontroller module provided for one specific embodiment of the present invention;

[0065] Figure 8 A schematic structural diagram of a circuit board provided for a specific embodiment of the present invention.

[0066] Among them, 1-rectifier module; 2-DC step-down module; 3-voltage-stabilized power supply module; 4-first current acquisition module; 5-second current acquisition module; 6-temperature acquisition module; 7-signal processing module; 8-stepping motor drive module; 9-DC voltage acquisition module; 10-speed sampling module; 11-microcontroller module; 12-communication module; 13-execution module; 14-engine; 15-generator; 16-high-voltage rectifier module; 17-inverter AC output; 18-low-voltage rectifier module; 19-low-voltage DC output. DETAILED DESCRIPTION

[0067] It should be understood that, in the description of the present invention, the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0068] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0069] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0070] In a specific embodiment, the present invention provides a power chain control system device for a generator set, such as Figure 1 As shown, the system device includes an electrically connected control circuit unit, a power chain unit and a converter unit, and the control circuit unit includes a power module, a current signal acquisition module, a DC voltage acquisition module 9, a speed sampling module 10, a signal processing module 7, a microcontroller module 11 and a stepper motor drive module 8. The power module is electrically connected to the current signal acquisition module, the DC voltage acquisition module 9, the speed sampling module 10, the signal acquisition board, the signal processing module 7 and the stepper motor drive module 8 for power supply, the current signal acquisition module and the DC voltage acquisition module 9 are electrically connected to the converter unit for signal acquisition, the speed sampling module 10 is electrically connected to the power chain unit for signal acquisition, the signal processing module 7 processes the collected information and feeds the information back to the microcontroller module 11, and the microcontroller module 11 receives the information and issues instructions, thereby controlling the movement mode of the stepper motor drive module 8.

[0071] The present invention is applicable to a light fuel power generation equipment in which a micro high-speed gasoline engine 14 and a multi-phase permanent magnet synchronous generator 15 coaxially move in a power chain unit, and high-quality AC power supply and DC power supply are obtained through a subsequent power electronic conversion unit.

[0072] The power chain unit in the present invention is mainly composed of an execution module 13 that receives instructions from the control circuit unit, an engine 14 and a permanent magnet generator 15; the conversion unit includes a high-voltage rectifier module 16, an inverter AC output 17, a low-voltage rectifier module 18 and a low-voltage DC output 19 for load requirements. The starting mechanism of the power chain unit is that when the user manually pulls up the pull rope, the rotor of the permanent magnet generator 15 moves, and the stator winding outputs low voltage and triggers the ignition high-voltage package at the same time, so that the engine 14 enters a cycle stroke, thereby forming low-voltage AC and three-phase high-voltage AC. After entering a stable working condition, the control circuit board unit is powered and inverted into industrial frequency mains output through the conversion unit. The microcontroller module 11 of the present invention sends instructions to the stepper motor drive module 8, so that the execution module 13 of the power chain unit is activated, thereby controlling the power generation of the generator 15.

[0073] The power chain control system device of the generator set provided by the present invention has a generator 15 with a rotation speed of not less than 7000 revolutions per minute. The system device provided by the present invention solves the problems of limited speed sampling accuracy and small adjustment range caused by the high-speed running engine 14, and has the advantages of light weight and small size of the circuit itself.

[0074] Furthermore, the power supply module includes a rectifier module 11, a DC step-down module 2 and a voltage-stabilized power supply module 3 connected in sequence, and the voltage-stabilized power supply module 3 includes four output ends, and the output ends are respectively connected to the microcontroller module 11, the current signal acquisition module, the DC voltage acquisition module 9 and the speed sampling module 10.

[0075] The DC step-down module 2 is electrically connected to the signal processing module 7 and the stepping motor driving module 8 .

[0076] The DC step-down module 2 includes a step-down conversion circuit, which is used for input voltage and output voltage. The input voltage range is 5 to 35V DC, and the output voltage range is 3.3 to 12V DC. The regulated power supply module 3 includes an open power supply and / or a linear regulated power supply, and the output regulated voltage range of the regulated power supply module 3 is 2.7 to 5V.

[0077] like Figure 2As shown, the power module in the present invention first converts the low voltage AC into low voltage DC through a rectifier, and then obtains a relatively pure low voltage DC through a filter network composed of an inductor group and a capacitor group, wherein the filter network can be an L-type, π-type, or a series-parallel combination of L-type and π-type composed of an inductor and a capacitor, and the filter network is ultimately a low-pass filter. The low voltage through the filter network is used as the input of the switching power supply to obtain a stable output voltage of 3.3-12V, which supplies power to the signal processing module 7 and the stepper motor drive module 8. The switching power supply is a step-down switching power supply, and the output voltage is then passed through a linear regulator to obtain the working voltage of 2.7-5V required by the main control chip. The stable voltage is then separated by common mode filtering to realize analog-to-digital power supply. After this series of processing, the ripple of the DC voltage output can be reduced, and the ability of precise control of the system device is improved.

[0078] In the present invention, the low-voltage AC voltage of the converter unit is converted into a DC voltage through a rectifier module 11, and then powered by a linear voltage-stabilized power supply module 3, a signal processing module 7, and a stepper motor drive module 8 through a DC step-down module 2. The voltage-stabilized power supply module 3 is powered by a current signal acquisition module, a DC voltage acquisition module 9, a speed sampling module 10, and a microcontroller module 11.

[0079] Furthermore, the rectifier module 11 includes at least one rectifier bridge stack and at least one power diode. When the rectifier module 1 includes multiple rectifier bridge stacks or multiple power diodes, the rectifier bridge stacks or / power diodes can be connected in series or in parallel by building a bridge circuit.

[0080] The rectifier bridge stack includes a half-bridge rectifier bridge stack and / or a full-bridge rectifier bridge stack. The voltage limit of the half-bridge rectifier bridge stack and the full-bridge rectifier bridge stack is independently 50-1000V.

[0081] The power diode includes at least one rectifier diode.

[0082] The power diodes include at least two series-parallel combinations of rectifier diodes.

[0083] The rectifier diode has a voltage limit of 50 to 1000V.

[0084] Furthermore, the current signal acquisition module includes a first current acquisition module 4 and a second current acquisition module 5, one end of the first current acquisition module 4 and the second current acquisition module 5 are respectively and independently electrically connected to the conversion unit, and the other end is respectively and independently electrically connected to the signal processing module 7, and the first current acquisition module 4 and the second current acquisition module 5 are respectively used to collect the current signal in the conversion unit and transmit it to the signal processing module 7.

[0085] The first current acquisition module 4 and the second current acquisition module 5 respectively and independently include a Hall device, a resistor device and a capacitor device which are electrically connected, and the Hall device, the resistor device and the capacitor device are used for signal acquisition.

[0086] like Figure 3 As shown, the first current acquisition module 4 in the present invention takes the load current signal of the inverter AC output 17 as input, and performs signal acquisition via Hall devices, resistors and capacitors. The second current acquisition module 5 takes the bus current of the high-voltage rectifier module 16 as input, and performs signal acquisition via Hall devices, resistors and capacitors. The Hall device mainly collects and processes the current signal to obtain the relationship between the input current and the output voltage. The core point of this circuit is the transmission and processing of the Hall current signal, which is converted into a voltage signal for the subsequent stage to process. The chip used has high anti-interference and accurately reflects the relationship between the load current, which is convenient for realizing the control of the current loop.

[0087] Furthermore, one end of the DC voltage acquisition module 9 is electrically connected to the converter unit, and the other end is connected to the microcontroller module 11; one end of the speed sampling module 10 is electrically connected to the power chain unit, and the other end is connected to the microcontroller module 11.

[0088] The DC voltage acquisition module 9 includes a first optocoupler, a first resistor component, a first capacitor component, a first diode and a first TVS tube. The first optocoupler, the first resistor component, the first capacitor component, the first diode and the first TVS tube are used to collect the voltage signal in the conversion unit.

[0089] The speed sampling module 10 includes a second optocoupler, a second resistor component, a second capacitor component, a second diode and a second TVS tube, and the second optocoupler, the second resistor component, the second capacitor component, the second diode and the second TVS tube are used to obtain the speed signal in the power chain unit.

[0090] like Figure 4 As shown, the speed sampling module 10 described in the present invention receives a low-voltage signal, first passes through the second resistor component and the second capacitor component to obtain a stable and clean signal, and then is cascaded with the second diode protection circuit to obtain a safer signal. The signal conversion is realized through the second optical coupler isolation, and then a stable frequency can be obtained through the second resistor component and the second capacitor component. The speed signal can be obtained through conversion, and the second diode protection circuit can protect the second optical coupler, so that the speed signal acquisition is stable and reliable.

[0091] The system device further comprises a temperature acquisition module 6 , one end of which is electrically connected to the power chain unit, and the other end of which is connected to the signal processing module 7 .

[0092] The temperature acquisition module 6 includes a temperature sensor, a third resistor component and a third capacitor component. The temperature sensor acquires the temperature signal of the power chain unit and transmits the temperature signal to the signal processing module 7 via the third resistor component and the third capacitor component.

[0093] The system device further includes a communication module 12 electrically connected to the microcontroller module 11 , and the communication module 12 and the microcontroller module 11 perform serial output.

[0094] Furthermore, the signal processing module 7 includes an operational amplifier, a fourth resistor component, a fourth capacitor component and a third TVS tube, and the operational amplifier, the fourth resistor component, the fourth capacitor component and the third TVS tube are used for signal processing.

[0095] The signal processing module 7 in the present invention includes an operational amplifier, a fourth resistor component, a fourth capacitor component and a third TVS tube, which form a combination of one or at least two of the same-phase and / or anti-phase proportional amplification circuits, and receives information from the first current acquisition module 4, the second current acquisition module 5 and the temperature acquisition module 6, and transmits it to the microcontroller module 11 after processing. The signal processing module 7 mainly processes the signals of the first current acquisition module 4, the second current acquisition module 5 and the temperature acquisition module 6. The microcontroller module 11 communicates with the host computer through the communication module 12, and controls the stepper motor drive module 8 according to the instructions of the host computer and the information fed back by the signal processing module 7, the DC voltage acquisition module 9 and the speed sampling module 10, thereby acting on the execution module 13 to achieve stable operation of the compact power chain control circuit of the lightweight high-speed gasoline power generation system.

[0096] like Figure 5 As shown, the signal processing module 7 is composed of one or more cascades of in-phase and inverting proportional amplification circuits composed of an operational amplifier, a fourth resistor component, a fourth capacitor component, three TVS tubes and other devices. Its main function is to convert weak signals into analog signals that can be recognized by the chip. The advantages of this circuit are strong anti-interference and high fidelity, and it can amplify effective signals to achieve the purpose of real-time current collection.

[0097] The stepper motor driving module 8 includes a chip driving plate or a discrete component plate.

[0098] The chip drive plate in the present invention is composed of a motor drive chip and peripheral resistors and capacitors, and the discrete component plate is composed of a Darlington tube, a power triode and resistors and capacitors. Figure 6As shown, the stepper motor driving module 8 adopts an integrated chip driving method to improve the stability and reliability of control. The driving of the stepper motor can be controlled by setting it according to the logic of the input signal and the output signal. The advantage of this circuit is that its movement mode can be changed when the power supply voltage is different, making the scope of application wider.

[0099] like Figure 7 As shown, the microcontroller module 11 includes an eight-bit digital control chip and / or a sixteen-bit digital control chip. The control chip of the microcontroller module 11 is a mainstream chip for industrial control. Due to the stability and reliability of the chip, the entire system control is faster and more accurate.

[0100] When the system device provided by the present invention controls the high-speed gasoline generator 15, the required amount of circulating oil is obtained by accurately controlling the stepper motor according to the real-time working conditions. The motor speed, load output current, DC bus output, low-voltage DC voltage and temperature of the unit are first measured. The microcontroller unit makes a comprehensive decision based on the host computer instructions and feedback signals, and then controls the movement of the stepper motor through the stepper motor drive module 8.

[0101] In a specific embodiment, the present invention provides a power chain control method for a generator set, wherein the method adopts a system device according to a specific embodiment, and the method comprises:

[0102] The control circuit unit collects signals from the power chain unit and the current conversion unit respectively, generates instructions after processing, and then controls the stepper motor drive module 8.

[0103] Further, the method comprises:

[0104] The control circuit unit collects the load current signal and bus current signal of the converter unit and the temperature signal of the power chain unit respectively, and processes the load current signal, bus current signal and temperature signal. The processed load current signal, bus current signal and temperature signal are fed back to the microcontroller module 11 to generate instructions.

[0105] Furthermore, the method includes: regulating the output voltage signal of the converter unit and the low-voltage AC voltage signal of the power chain unit respectively collected by the circuit unit, and feeding back the output voltage signal and the low-voltage AC voltage signal respectively to the microcontroller module 11 to generate instructions.

[0106] The method further includes: during the power chain control process, the voltage-stabilized power supply module 3 supplies power to the first current acquisition module 4 , the second current acquisition module 5 , the DC voltage acquisition module 9 , the speed sampling module 10 and the microcontroller module 11 .

[0107] In another specific embodiment, the present invention provides a Figure 8 The circuit board shown includes the system device described in the first aspect.

[0108] The number of layers of the circuit board in the present invention can be two-layer, four-layer, or six-layer boards, depending on the sensitive signals and the processing of key information and the overall layout and wiring. It has the advantages of compact space and high utilization rate. In terms of processing sensor signals, the signals are processed separately, reducing the coupling between signals and enhancing the control stability of the system. The power chain control system device of the generator set provided by the present invention uses a second-order RC low-pass filter circuit, a diode, an optical coupler, a resistor, a capacitor, and a TVS tube for cascading, realizes signal isolation and high-speed acquisition, improves the quality of the speed signal, and realizes the protection of the optical coupler and the subsequent chip, achieving the purpose of stabilizing the speed acquisition, and its speed range is 1000 to 10000 rad / s.

[0109] The present invention uses a current sensor with an integrated Hall device and has a built-in signal processing function. Only a small amount of peripheral resistors, capacitors, diodes and TVS tubes are required to realize current collection. The current collection range is wide, the response speed is fast, and the anti-interference ability is strong. It has the advantage of real-time dynamic current collection according to load changes.

[0110] In addition, the DC voltage acquisition module 9 used in the present invention utilizes an optical coupler to work in a linear region, and then performs voltage division sampling through a resistor, and only requires a small amount of resistors and capacitors for filtering and sampling to realize the acquisition of voltage signals, which has the advantages of low cost, few components, and safety and reliability. The present invention uses multi-dimensional sensing signals for acquisition, and can meet the control system with more complex working conditions and higher requirements based on multi-dimensional sensing information, thereby improving the control accuracy and stability of the system, and having the advantages of precise control and speed regulation.

[0111] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A power chain control system device for a generator set, characterized in that: The system device comprises an electrically connected control circuit unit, a power chain unit and a current conversion unit, wherein the control circuit unit comprises a power supply module, a current signal acquisition module, a DC voltage acquisition module, a speed sampling module, a temperature acquisition module, a signal processing module, a microcontroller module and a stepping motor drive module; The power supply module is electrically connected to the current signal acquisition module, the DC voltage acquisition module, the speed sampling module, the signal acquisition panel, the signal processing module and the stepper motor drive module for power supply. The power supply module includes a rectifier module, a DC step-down module and a voltage-stabilized power supply module connected in sequence. The low-voltage AC voltage signal of the converter unit is obtained by the rectifier module to obtain a DC voltage, and then the DC step-down module is used to power the linear voltage-stabilized power supply module, the signal processing module and the stepper motor drive module. The current signal acquisition module and the DC voltage acquisition module are respectively electrically connected to the converter unit for signal acquisition. The current signal acquisition module includes a first current acquisition module and a second current acquisition module. One end of the first current acquisition module and the second current acquisition module are respectively and independently electrically connected to the converter unit, and the other end is respectively and independently electrically connected to the signal processing module. The first current acquisition module and the second current acquisition module are respectively used to collect the load current signal and the bus current signal in the converter unit, and transmit them to the signal processing module; the DC voltage acquisition module is used to collect the output voltage signal of the converter unit; The speed sampling module is electrically connected to the power chain unit and is used to collect the low-voltage AC voltage signal of the power chain unit. One end of the temperature acquisition module is electrically connected to the power chain unit and the other end is connected to the signal processing module and is used to collect the temperature signal of the power chain unit. The signal processing module processes the collected information and feeds the information back to the microcontroller module. The microcontroller module receives the information, comprehensively processes the load current signal, bus current signal, temperature signal, output voltage signal and low-voltage AC voltage signal and issues instructions, thereby controlling the stepper motor drive module.

2. The system device according to claim 1, characterized in that: The voltage-stabilized power supply module comprises four output terminals, and the output terminals are respectively connected to the microcontroller module, the current signal acquisition module, the DC voltage acquisition module and the speed sampling module.

3. The system device according to claim 2, characterized in that: The DC step-down module is electrically connected to the signal processing module and the stepper motor driving module.

4. The system device according to claim 2, characterized in that: The DC step-down module comprises a step-down conversion circuit, and the step-down conversion circuit is used for input voltage and output voltage.

5. The system device according to claim 4, characterized in that: The input voltage range is 5~35V DC.

6. The system device according to claim 5, characterized in that: The input voltage range is 12~26V.

7. The system device according to claim 4, characterized in that: The output voltage range is 3.3~12V DC.

8. The system device according to claim 7, characterized in that: The output voltage range is 5~12V.

9. The system device according to claim 2, characterized in that: The voltage-stabilized power supply module includes an open-circuit power supply and / or a linear voltage-stabilized power supply.

10. The system device according to claim 9, characterized in that: The voltage stabilization range of the output of the voltage stabilization power supply module is 2.7~5V.

11. The system device according to claim 10, characterized in that: The voltage stabilization range of the output of the voltage stabilization power supply module is 3.3~5V.

12. The system device according to claim 1, characterized in that: The rectifier module includes at least one rectifier bridge stack or at least one power diode.

13. The system device according to claim 12, characterized in that: The rectifier bridge stack includes a half-bridge rectifier bridge stack and / or a full-bridge rectifier bridge stack.

14. The system device according to claim 13, characterized in that: The voltage limits of the half-bridge rectifier bridge stack and the full-bridge rectifier bridge stack are independently 50-1000V.

15. The system device according to claim 14, characterized in that: The voltage limits of the half-bridge rectifier bridge stack and the full-bridge rectifier bridge stack are independently 50-400V.

16. The system device according to claim 12, characterized in that: The power diode includes at least one rectifier diode.

17. The system device according to claim 16, characterized in that: The power diodes include at least two series-parallel combinations of rectifier diodes.

18. The system device according to claim 17, characterized in that: The rectifier diode has a voltage limit of 50-1000V.

19. The system device according to claim 1, characterized in that: The first current acquisition module and the second current acquisition module respectively and independently include a Hall device, a resistor device and a capacitor device which are electrically connected, and the Hall device, the resistor device and the capacitor device are used for signal acquisition.

20. The system device according to claim 1, characterized in that: One end of the DC voltage acquisition module is electrically connected to the converter unit, and the other end is connected to the microcontroller module. One end of the speed sampling module is electrically connected to the power chain unit, and the other end is connected to the microcontroller module.

21. The system device according to claim 20, characterized in that: The DC voltage acquisition module includes a first optocoupler, a first resistor component, a first capacitor component, a first diode and a first TVS tube. The first optocoupler, the first resistor component, the first capacitor component, the first diode and the first TVS tube are used to collect the voltage signal in the conversion unit.

22. The system device according to claim 20, characterized in that: The speed sampling module includes a second optocoupler, a second resistor component, a second capacitor component, a second diode and a second TVS tube, and the second optocoupler, the second resistor component, the second capacitor component, the second diode and the second TVS tube are used to obtain the speed signal in the power chain unit.

23. The system device according to claim 1, characterized in that: The temperature acquisition module includes a temperature sensor, a third resistor component and a third capacitor component. The temperature sensor acquires the temperature signal of the power chain unit and transmits the temperature signal to the signal processing module via the third resistor component and the third capacitor component.

24. The system device according to claim 1, characterized in that: The system device also includes a communication module electrically connected to the microcontroller module, and the communication module and the microcontroller module perform serial output.

25. The system device according to claim 1, characterized in that: The signal processing module includes an operational amplifier, a fourth resistor component, a fourth capacitor component and a third TVS tube, and the operational amplifier, the fourth resistor component, the fourth capacitor component and the third TVS tube are used for signal processing.

26. The system device according to claim 1, characterized in that: The stepper motor driving module includes a chip driving plate or a discrete component plate.

27. The system device according to claim 1, characterized in that: The microcontroller module includes an eight-bit digital control chip and / or a sixteen-bit digital control chip.

28. A power chain control method for a generator set, characterized in that: The method adopts the system device according to any one of claims 1 to 27, and the method comprises: The control circuit unit collects signals from the power chain unit and the converter unit respectively, generates instructions after processing, and then controls the stepper motor drive module.

29. The method according to claim 28, characterized in that The method includes: The control circuit unit collects the first signal, the second signal and the third signal respectively, and processes the first signal, the second signal and the third signal. The processed first signal, the second signal and the third signal are fed back to the microcontroller module to generate instructions.

30. The method according to claim 29, characterized in that The first signal is a load current signal of the current conversion unit; The second signal is a bus current signal of the conversion unit; The third signal is a temperature signal of the power chain unit.

31. The method according to claim 28, characterized in that The method comprises: the control circuit unit respectively collects the fourth signal of the power chain unit and the fifth signal of the current conversion unit, and feeds back the fourth signal and the fifth signal to the microcontroller module to generate instructions.

32. The method according to claim 31, characterized in that The fourth signal is a low voltage AC voltage signal of the power chain unit; The fifth signal is an output voltage signal of the conversion unit.

33. The method according to claim 28, characterized in that The method also includes: during the power chain control process, the voltage-stabilized power supply module supplies power to the first current acquisition module, the second current acquisition module, the DC voltage acquisition module, the speed sampling module and the microcontroller module.

34. A circuit board, characterized in that: The circuit board comprises the system device according to any one of claims 1-27.

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