Generator power supply control module

Abstract

The utility model provides a power supply control module of a generator. The power supply control module comprises a three-phase synchronous rectification inversion module, a bidirectional DC boost-buck module, a synchronous detection module and a main control module. The alternating current end of the three-phase synchronous rectification and inversion module is connected with a generator, and the direct current end of the three-phase synchronous rectification and inversion module is connected with the first input and output end of the bidirectional direct current buck-boost module; a second input / output end of the bidirectional direct-current buck-boost module is connected with the battery through the first switch; the alternating current end of the three-phase synchronous rectification inversion module is connected with the input end of the synchronous detection module; the output end of the synchronous detection module is connected with the first input end of the main control module; the second input end of the main control module is connected with the control end of the bidirectional direct current buck-boost module; a third input end of the main control module is connected with a control end of the three-phase synchronous rectification inversion module; the utility model is beneficial to reducing the cost, improving the efficiency and increasing the reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of generator, especially the field of generator power conversion. BACKGROUND

[0002] At present, the power supply control equipment powered by the generator in the field of generator can only realize one function, for example, the generator starting controller, the main function is to convert the direct current of the battery into three-phase alternating current to drive the motor to rotate and start the engine, the generator charger, the main function is to convert the alternating current output by the generator into direct current voltage suitable for battery charging to charge the battery, such as mobile unmanned aerial vehicle charger, the generator welding machine, which converts the three-phase alternating current of the generator into 220V AC alternating current, then connects an external welding machine for use, or directly converts the three-phase alternating current into power suitable for welding requirements, and finally the outdoor mobile adjustable power supply, which converts three-phase power into single-phase alternating current and then connects an external adjustable power supply for use. Since the above-mentioned power supply equipment with different functions is powered by the generator, it needs to be converted several times to realize a certain function, which is high in cost, low in efficiency and large in size. If several types of power supply are needed at the same time, the cost is higher for the user, and it is not convenient to carry, etc. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems of single function, high cost, low efficiency and large size of the existing generator power supply equipment, the utility model provides a generator power supply control module.

[0004] In order to solve the above-mentioned problems, the utility model adopts the following technical scheme:

[0005] A generator power supply control module, comprising a three-phase synchronous rectification inverter module, a bidirectional DC boost and buck module, a synchronous detection module and a main control module, the alternating current end of the three-phase synchronous rectification inverter module is connected with the generator, the direct current end of the three-phase synchronous rectification inverter module is connected with the first input and output end of the bidirectional DC boost and buck module, the second input and output end of the bidirectional DC boost and buck module is connected with the battery through the first switch, the alternating current end of the three-phase synchronous rectification inverter module is connected with the input end of the synchronous detection module, the output end of the synchronous detection module is connected with the first input end of the main control module, the second input end of the main control module is connected with the control end of the bidirectional DC boost and buck module, and the third input end of the main control module is connected with the control end of the three-phase synchronous rectification inverter module.

[0006] In this way, the three-phase synchronous rectification inverter module is combined with the bidirectional DC boost and buck module to directly convert three-phase alternating current into direct current, and the intermediate indirect conversion circuit is omitted, so that the cost is reduced, the conversion efficiency and reliability are improved.

[0007] Further, the bidirectional DC boost and buck module comprises MOS tube module Q7, MOS tube module Q8, MOS tube module Q9, MOS tube module Q10 and inductor L2; one end of the inductor L2 is connected with the source of the MOS tube module Q7 and the drain of the MOS tube module Q8, the other end of the inductor L2 is connected with the source of the MOS tube module Q9 and the drain of the MOS tube module Q10, the source of the MOS tube module Q8 and the source of the MOS tube module Q10 are connected with the negative electrode of the battery; the drain of the MOS tube module Q7 is the first input and output end; the drain of the MOS tube module Q9 is the second input and output end.

[0008] In this way, since the bidirectional DC boost and buck module adopts the H-shaped bridge composed of MOS tubes which can both boost and buck, it is better adapted to batteries and electrical equipment of various voltages and generators of different generating voltages; at the same time, since all MOS tube components are used, the power consumption of the system is lower, the conversion efficiency is higher, and the versatility is strong.

[0009] Further, the fourth input end of the main control module is connected with the output end of the current acquisition module, and the input end of the current acquisition module is connected with the current sensor arranged between the AC end of the three-phase synchronous rectification and inversion module and the negative electrode of the battery and the current sensor arranged between the second input and output end of the bidirectional DC boost and buck module and the negative electrode of the battery.

[0010] Further, the fifth input end of the main control module is connected with the output end of the voltage acquisition module, and the input end of the voltage acquisition module is connected with the first input and output end of the bidirectional DC boost and buck module and the second input and output end of the bidirectional DC boost and buck module.

[0011] In this way, the use of multiple groups of voltage and current detection circuits ensures the reliability and safety of the system, and at the same time provides beneficial technical support for the same circuit to realize different functions.

[0012] Further, the three-phase synchronous rectification and inversion module comprises MOS tube module Q1, MOS tube module Q2, MOS tube module Q3, MOS tube module Q4, MOS tube module Q5 and MOS tube module Q6; the six groups of MOS tube modules are connected in a three-phase full-bridge rectification mode.

[0013] In this way, since the three-phase synchronous rectification and inversion module adopts full-MOS components to realize the full-bridge synchronous rectification mode, compared with the ordinary rectification bridge, the power consumption of the system is further reduced, which is beneficial to heat dissipation and size reduction.

[0014] Further, one end of the bidirectional DC boost and buck module is connected with one end of the first filter; the other end of the bidirectional DC boost and buck module is connected with one end of the second filter, and the other ends of the first filter and the second filter are connected with the negative electrode of the battery.

[0015] Thus, the stability and reliability of the system voltage quality are further improved, and different functions can be adapted.

[0016] Further, the second input / output end of the bidirectional DC boost-buck module is connected with one end of a second switch, the other end of the second switch is connected with the positive electrode of the output port, the other end of the second switch is connected with the negative electrode of the battery, and the second switch is controlled by the main control module.

[0017] Thus, multiple functional interfaces can be provided at the output end, and interfaces of different devices can be realized, such as a battery charging interface, an electric welding output interface, a power output interface, and the like, so that multiple functions of the same circuit can be realized.

[0018] The utility model discloses the beneficial effect is: adopt three -phase synchronous rectification and bidirectional DC boost-buck combination, omit indirect conversion circuit, thereby reduce cost, provide reliability, again, same circuit, realize different functions through the internal program control of main control module, further reduce cost, reduce the size, increase reliability. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the circuit schematic diagram of the embodiment of the utility model.

[0020] Figure 2 It is three -phase ac synchronous detection waveform diagram. EMBODIMENT

[0021] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, in the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "longitudinal", "radial", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0022] In the description of the utility model, it is necessary to explain, unless there is definite stipulation and limitation, the term " install", " link", " connect" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connect, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through intermediate medium, can be the intercommunication of two elements, for ordinary skilled person in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0023] Please refer to Figure 1 As shown in the utility model provides a kind of generator power control module, including three-phase synchronous rectification inverter module 101, bidirectional DC boost module 102, synchronous detection module 111, main control module 109;The AC end of the three-phase synchronous rectification inverter module 101 is connected with generator 100, and the DC end of the three-phase synchronous rectification inverter module 101 is connected with the first input-output end of the bidirectional DC boost module 102;The second input-output end of the bidirectional DC boost module 102 is connected with battery 105 by first switch 103;The AC end of the three-phase synchronous rectification inverter module 101 is connected with the input end of the synchronous detection module 111;The output end of the synchronous detection module 111 is connected with the first input end of the main control module 109;The second input end of the main control module 109 is connected with the control end of the bidirectional DC boost module 102;The third input end of the main control module 109 is connected with the control end of the three-phase synchronous rectification inverter module 101.

[0024] In the embodiment, the bidirectional DC boost module 102 includes MOS tube module Q7, MOS tube module Q8, MOS tube module Q9, MOS tube module Q10, inductance L2, one end of the inductance L2 is connected with the source of MOS tube module Q7 and the drain of MOS tube module Q8, the other end of the inductance L2 is connected with the source of MOS tube module Q9 and the drain of MOS tube module Q10, the source of MOS tube module Q8 and the source of MOS tube module Q10 are connected with the negative electrode of battery 105;The drain of the MOS tube module Q7 is the first input-output end;The drain of the MOS tube module Q9 is the second input-output end. All MOS tube modules contain corresponding drive circuit.

[0025] In the embodiment, the fourth input end of the main control module 109 is connected with the output end of current acquisition module 107, and the input end of the current acquisition module 107 is connected to the current sensor 115 arranged between the AC end of the three-phase synchronous rectification inverter module 101 and the negative electrode of battery 105 and the current sensor 116 arranged between the second input-output end of the bidirectional DC boost module 102 and the negative electrode of battery 105.

[0026] In the embodiment, the fifth input end of the main control module 109 is connected with the output end of the voltage acquisition module 107, and the input end of the voltage acquisition module 107 is connected to the first input-output end of the bidirectional DC boost-buck module 102 and the second input-output end of the bidirectional DC boost-buck module 102.

[0027] In the embodiment, the three-phase synchronous rectification inversion module 101 comprises MOS tube modules Q1, Q2, Q3, Q4, Q5 and Q6, and the six groups of MOS tube modules are connected in a three-phase full-bridge rectification mode. All the MOS tube modules comprise corresponding driving circuits.

[0028] In the embodiment, the first input-output end of the bidirectional DC boost-buck module 102 is connected with one end of the first filter, and the second input-output end of the bidirectional DC boost-buck module 102 is connected with one end of the second filter, and the other ends of the first filter and the second filter are connected with the negative electrode of the battery 105.

[0029] In the embodiment, one end of the second switch 104 of the second input-output end of the bidirectional DC boost-buck module 102 is connected, the other end of the second switch 104 is connected with the positive electrode of the output port 106, the other end of the second switch 104 is connected with the negative electrode of the battery 105, and the second switch 104 is controlled by the main control module 109.

[0030] In the embodiment, the auxiliary voltage module 108 is arranged to provide a suitable power supply for the system circuit, and the input end of the auxiliary voltage module 108 is connected to the positive and negative electrodes of the battery 105. The throttle and accelerator driving module 112 is further arranged to drive the throttle motor and the accelerator motor of the generator 100 to cooperate with the generator 100 to work.

[0031] Compared with the prior art, two ways of starting the generator are provided for the existing similar generator starting controller, one is to start the generator by using a fixed voltage battery, and the other is to start the generator by boosting the voltage of the battery, and the two ways cannot realize the mutual compatibility of the generators of different voltage batteries and multiple starting voltages. Since the utility model adopts a three-phase synchronous rectification inversion module, the same circuit can realize the dual functions of three-phase synchronous rectification and three-phase inversion alternating current; and a bidirectional DC boost and buck module is adopted, the voltage input at any end can be boosted to be higher than the variable voltage at the input end or be bucked to be lower than the variable voltage at the input end, so that the batteries of different voltages can be converted into the voltage suitable for starting the generator by the bidirectional DC boost and buck module, and then the generator is started by the three-phase synchronous rectification inversion module. In addition, when the generator is started, under the control of the main controller, the three-phase alternating current is converted into direct current by the three-phase synchronous rectification, and the main control module is configured with the bidirectional DC boost and buck module to become a power supply output with different functions, that is, when the first switch is opened and the second switch is closed, the battery charger, the direct current manual electric arc welding machine, the adjustable voltage stabilizing power supply and the like with different voltages can be configured, and the external power consumption equipment is connected through the output port. In this way, the same circuit is converted into multiple functions by fully utilizing the circuit characteristics, so that the cost is reduced, the reliability is improved, the compatibility is realized and the size is reduced.

[0032] As a specific embodiment, please refer to Figure 1 、 Figure 2 It should be noted that the current acquisition module 107 and the voltage acquisition module 110 in the embodiment adopt an operational amplifier differential detection circuit, and the auxiliary power module 108, the air door and the oil door motor driving module 112 and the main control module 109 are all known technologies, so they are not listed one by one in the embodiment, and the related working principles involved will not be described here.

[0033] The working process of the specific embodiment will be further described below.

[0034] The generator 100 is a permanent magnet brushless motor without a Hall; the auxiliary power module 108 provides a suitable power supply voltage for the related modules, the main controller module 109 is built-in a microprocessor controller; the voltage acquisition module 110 respectively acquires the voltages of the first input and output end and the second input and output end of the bidirectional DC boost and buck module 102; the current acquisition module 107 respectively acquires the currents of the three-phase synchronous rectification module 101 from the alternating current end to the negative electrode of the battery 105 and the current of the bidirectional DC boost and buck module 102 from the second input and output end to the negative electrode of the battery 105; the main control module 109 processes the received voltage and current signals.

[0035] When starting the generator, the main controller module 109 controls the first switch 103 to close, the second switch 104 to open, and the throttle and oil door motor drive module 112 to drive the opening and closing degree of the throttle motor and oil door motor arranged on the generator 100; the battery voltage is filtered by the second filter 114 and input to the second input and output end of the bidirectional DC boost and buck module 102. If the voltage of the battery 105 is higher than the normal starting voltage of the generator 100, the main control module 109 controls the MOS tube module Q7 to be turned on and the MOS tube module Q8 to be turned off, and at the same time outputs a set of complementary PWM signals to drive the MOS tube module Q9 and the MOS tube module Q10 to realize step-down conversion with the inductor L2; on the contrary, if the voltage of the battery 105 is lower than the normal starting voltage of the generator 100, the main control module 109 controls the MOS tube module Q9 to be turned on and the MOS tube Q10 to be turned off, and at the same time outputs a set of complementary PWM signals to drive the MOS tube module Q7 and the MOS tube module Q8 to realize step-up conversion with the inductor L2; the converted voltage is filtered by the first filter 113 and input to the DC end of the three-phase synchronous rectification inverter module 101; the main controller 109 outputs three sets of complementary output PWM signals to drive the three-phase synchronous rectification inverter module 101 according to the program control, and combines the three-phase synchronous signal detected by the synchronous detection module 111 to detect the generator 100 to convert the direct current into three-phase alternating current to drive the generator to start directly; in this process, the main controller module 109 controls the opening degree of the throttle motor and oil door motor arranged on the generator 100 in real time, and detects the related voltage and current change, and adjusts the value of the PWM duty cycle in real time, so that the generator 100 starts normally. Since the three-phase synchronous rectification inverter module 101 converts the direct current into three-phase alternating current, relevant technical materials can be consulted, so it is not described here.

[0036] Figure 2 is a schematic diagram of the alternating voltage input by the synchronous detection module 111 and the three-phase synchronous signal output.

[0037] When the generator 100 starts, the main controller first closes all MOS tube modules, controls the first switch 103 to be disconnected, and controls the second switch 104 to be disconnected. The main control module 109 controls the three-phase synchronous rectification and inversion module to perform synchronous rectification according to a three-phase synchronous signal; the three-phase synchronous signal contains a zero-crossing point and a phase signal of a related phase voltage; the control process is introduced by taking the A phase as an example; when the main control module 109 detects that the Ua signal jumps from a low level to a high level, it indicates that the A phase voltage is just at the zero-crossing point and is in the positive half cycle of alternating current; then the main control module 109 delays a phase angle to open the A phase corresponding upper bridge arm MOS tube module Q1, closes the lower bridge arm MOS tube module Q2, and also closes the B phase and C phase upper bridge arm MOS tube module Q3 and MOS tube module Q5, and opens the B phase and C phase upper bridge arm MOS tube module Q4 and MOS tube module Q6; in this way, the Uab and Uac alternating currents are rectified into direct currents through the MOS tube module Q1, the MOS tube module Q4 and the MOS tube module Q5; when the main control module detects the signals of the B phase or the C phase, it controls in the same way. The rectified voltage is filtered by the first filter 113 and input to the first input and output end of the bidirectional direct current boost and buck module 102; the main controller 109 configures different working modes of the bidirectional direct current boost and buck module 102 according to the internal program to realize different functions. For example, to realize the function of a battery charger, first, the main controller 109 selects the battery 105 connected through the first switch 103 or the battery connected to the external port 106 connected through the second switch 104 according to the internal program, and determines the battery voltage and capacity level that needs to be charged; then, combined with the related voltage and current signals, the four groups of MOS tube modules of the bidirectional direct current boost and buck module 102 are driven to work in the voltage range suitable for battery charging to charge the battery. Similarly, to realize the functions of manual arc welding and adjustable power supply, the working modes of the bidirectional direct current boost and buck module are configured to meet the corresponding requirements. The working principle and process of the bidirectional boost and buck module 102 and the working principle of manual arc welding and adjustable power supply can be referred to the existing mature technical materials, which will not be described here.

[0038] The preferred embodiments of the present application are described above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall be within the protection scope determined by the claims.

Claims

1. A generator power control module, characterized by: The application relates to a three-phase synchronous rectification and inversion module, a bidirectional DC boost and buck module, a synchronous detection module and a main control module.

2. A generator power pack control module according to claim 1, characterised in that: The bidirectional DC boost and buck module comprises MOS tube modules Q7, Q8, Q9, Q10 and an inductor L2; one end of the inductor L2 is connected with the source of the MOS tube module Q7 and the drain of the MOS tube module Q8, the other end of the inductor L2 is connected with the source of the MOS tube module Q9 and the drain of the MOS tube module Q10, and the source of the MOS tube module Q8 and the source of the MOS tube module Q10 are connected with the negative electrode of a battery; the drain of the MOS tube module Q7 is a first input and output end, and the drain of the MOS tube module Q9 is a second input and output end.

3. A generator power control module according to claim 1, wherein: The fourth input end of the main control module is connected with the output end of a current collection module, and the input end of the current collection module is connected with a current sensor arranged between the AC end of the three-phase synchronous rectification and inversion module and the negative electrode of the battery and a current sensor arranged between the second input and output end of the bidirectional DC boost and buck module and the negative electrode of the battery.

4. A generator power control module according to claim 1, wherein: The fifth input end of the main control module is connected with the output end of a voltage collection module, and the input end of the voltage collection module is connected with the first input and output end of the bidirectional DC boost and buck module and the second input and output end of the bidirectional DC boost and buck module.

5. A generator power control module according to claim 1, wherein: The three-phase synchronous rectification and inversion module comprises MOS tube modules Q1, Q2, Q3, Q4, Q5 and Q6; and the six groups of MOS tube modules are connected in a three-phase full-bridge rectification mode.

6. A generator power control module according to claim 2, wherein: One end of the first input and output end of the bidirectional DC boost and buck module is connected with one end of a first filter; one end of the second input and output end of the bidirectional DC boost and buck module is connected with one end of a second filter, and the other ends of the first filter and the second filter are connected with the negative electrode of the battery.

7. A generator power control module according to claim 2, wherein: The second input and output end of the bidirectional DC boost and buck module is connected with one end of a second switch, the other end of the second switch is connected with the positive electrode of an output port, and the other end of the second switch is connected with the negative electrode of the battery; and the second switch is controlled by the main control module.

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