High-density integrated anti-dragging starting alternating current and direct current integrated controller

Abstract

The utility model relates to a high-density integrated reverse dragging starting alternating current and direct current integrated controller, which comprises an engine, a starting integrated circuit and an alternating current and direct current conversion circuit which are electrically connected in sequence, the engine is configured to be in a three-phase alternating current output mode / reverse dragging starting mode; the AC-DC conversion circuit is configured to provide single-phase AC voltage output / DC boost output / DC step-down output; when the engine is in a three-phase alternating current output mode, the starting integrated circuit outputs and converts three-phase alternating current voltage of the engine into high-voltage direct current; the alternating current-direct current conversion circuit converts the high-voltage direct current into one-way alternating current / low-voltage direct current; when the engine is in a reverse dragging starting mode, the alternating current-direct current conversion circuit boosts the voltage of the battery and provides the boosted voltage to the starting integrated circuit; and the starting integrated circuit converts the boosted high-voltage direct current into three-phase alternating current to reversely drag and start the engine. The circuit modules are interactively combined together, so that the problems of large size, high design cost, device redundancy and the like of an alternating-current and direct-current integrated body are solved, and the product integration level is greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of digital engines, and particularly relates to an AC-DC integrated controller with high-density integration and reverse-drive starting. Background Art

[0002] A digital variable-frequency engine is a motor controlled by digital technology and variable-frequency technology, which can flexibly adjust the frequency and voltage of the output motor. With the rapid development of digital variable-frequency engines and the rapid development of the mobile energy storage market, the demand for AC-DC integration with one-key reverse-drive starting in variable-frequency engines is becoming increasingly strong, that is, the integration degree is getting higher and higher. At present, the conventional technical solution is to piece together an inverter, a DC-DCDC, and a one-key starting module separately to barely meet the functional requirements of customers. Since each component needs to be designed and integrated separately, the manufacturing cost and system cost are relatively high, resulting in a low cost performance of the product. At the same time, the above-mentioned problems of scattered components and low integration degree lead to a large volume of the engine design, which does not meet the current product design requirements for high efficiency and light weight. Therefore, in order to solve the above problems, an AC-DC integrated controller with high-density integration and reverse-drive starting is needed. Summary of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a high-integration topology structure and a corresponding control method to achieve the maximum sharing of power devices. Therefore, an AC-DC integrated controller with high-density integration and reverse-drive starting is proposed.

[0004] An AC-DC integrated controller with high-density integration and reverse-drive starting, characterized in that:

[0005] It includes an engine, a starting-integrated circuit, and an AC-DC conversion circuit that are electrically connected in sequence;

[0006] The engine is configured in a three-phase AC output mode / reverse-drive starting mode;

[0007] The AC-DC conversion circuit is configured to provide single-phase AC voltage output / DC boost output / DC buck output;

[0008] When the engine is in the three-phase AC output mode, the starting-integrated circuit converts the three-phase AC voltage output of the engine into high-voltage direct current;

[0009] The AC-DC conversion circuit converts the high-voltage direct current into single-phase alternating current / low-voltage direct current;

[0010] When the engine is in the reverse-drive starting mode, the AC-DC conversion circuit boosts the voltage of the battery and supplies it to the starting-integrated circuit;

[0011] The integrated starting and generating circuit converts the boosted high-voltage direct current into three-phase alternating current to reverse-drive and start the engine.

[0012] To better implement the present utility model, it can be further:

[0013] The control unit is respectively used to control the three-phase rectification / three-phase inversion of the integrated starting and generating circuit, and the single-phase AC voltage output / direct current boost output / direct current buck output of the AC-DC conversion circuit.

[0014] Further: The integrated starting and generating circuit is a three-phase bridge control circuit composed of power transistors Q1, Q2, Q3, Q4, Q5, and Q6;

[0015] The source of the power transistor Q1 is connected to the drain of the power transistor Q2, the source of the power transistor Q3 is connected to the drain of the power transistor Q4, the source of the power transistor Q5 is connected to the drain of the power transistor Q6. The drains of the power transistors Q1, Q3, and Q5 are all connected to the positive pole of the first power supply port, and the sources of the power transistors Q2, Q4, and Q6 are all connected to the negative pole of the first power supply port. The capacitor C1 is connected in series between the positive pole and the negative pole of the first power supply port;

[0016] The U-phase terminal of the engine is connected to the common terminal of the power transistors Q1 and Q2, the V-phase terminal of the engine is connected to the common terminal of the power transistors Q3 and Q4, and the W-phase terminal of the engine is connected to the common terminal of the power transistors Q5 and Q6.

[0017] Further: The AC-DC conversion circuit includes power transistors Q7, Q8, Q9, and Q10;

[0018] The source of the power transistor Q7 is connected to the drain of the power transistor Q8, the source of the power transistor Q9 is connected to the drain of the power transistor Q10. The drains of the power transistors Q7 and Q9 are both connected to the positive pole of the first power supply port, and the drains of the power transistors Q8 and Q10 are both connected to the positive pole of the first power supply port;

[0019] The first end of the inductor L1 is connected between the power transistors Q7 and Q8. The second end of the inductor L1 is the first AC output terminal. The second AC output terminal is connected between the power transistors Q9 and Q10. The capacitor C2 is connected across the first AC output terminal and the second AC output terminal;

[0020] The second end of the inductor L1 is connected to the first DC output port through the control switch K1. The second DC output terminal is connected between the power transistors Q9 and Q10.

[0021] Further: The battery is connected between the first DC output terminal and the second DC output terminal. The positive electrode of the battery is connected to the first DC output terminal, and the positive electrode of the battery is connected to the second DC output terminal.

[0022] The battery is connected between the first DC output terminal and the second DC output terminal. Specifically, the battery is a 60V battery. The positive electrode of the battery is connected to the first DC output terminal, and the negative electrode of the battery is connected to the second DC output terminal.

[0023] Further: A capacitor C3 is connected across the first DC output terminal and the second DC output terminal.

[0024] The beneficial effects of the present utility model are as follows:

[0025] The overall structure has a high degree of composite utilization. The power transistors Q1, Q2, Q3, Q4, Q5, and Q6 constitute the common circuit structure of the three-phase rectifier circuit and the three-phase inverter circuit, respectively realizing reverse drag and three-phase rectification. The power transistors Q7, Q8, Q9, and Q10 constitute a full-bridge drive circuit. Among them, based on the full-bridge drive circuit, when reverse drag boosting is required, when the power transistor Q10 is turned on and the power transistor Q9 is turned off, the capacitor C1, the power transistors Q7, Q8, and the inductor L1 constitute a boosting circuit. When power generation is required, the capacitor C2, the power transistors Q7, Q8, and the inductor L1 constitute a bucking circuit. From the above analysis, it can be seen that the present utility model solves the problems of large volume, high design cost, and device redundancy in the AC-DC integration by combining various circuit modules together, greatly improving the product integration. Description of the Drawings

[0026] Figure 1 is the circuit diagram of the present utility model;

[0027] Figure 2 is the usage schematic diagram of the present utility model. Detailed Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] As Figure 1 and Figure 2 shown:

[0030] A high-density integrated AC-DC integrated controller for reverse tow starting, including an engine. The engine has a U-phase terminal, a V-phase terminal, and a W-phase terminal, power transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, and Q10.

[0031] The source of power transistor Q1 is connected to the drain of power transistor Q2, the source of power transistor Q3 is connected to the drain of power transistor Q4, the source of power transistor Q5 is connected to the drain of power transistor Q6. The drains of power transistors Q1, Q3, and Q5 are all connected to the positive pole of the first power supply port, and the sources of power transistors Q2, Q4, and Q6 are all connected to the negative pole of the first power supply port. A voltage stabilizing capacitor is connected in series between the positive pole and the negative pole of the first power supply port.

[0032] The U-phase terminal of the engine is connected to the common terminal of power transistors Q1 and Q2, the V-phase terminal of the engine is connected to the common terminal of power transistors Q3 and Q4, and the W-phase terminal of the engine is connected to the common terminal of power transistors Q5 and Q6.

[0033] The source of power transistor Q7 is connected to the drain of power transistor Q8, the source of power transistor Q9 is connected to the drain of power transistor Q10. The drains of power transistors Q7 and Q9 are both connected to the positive pole of the first power supply port, and the drains of power transistors Q8 and Q10 are both connected to the positive pole of the first power supply port.

[0034] The first end of inductor L1 is connected between power transistors Q7 and Q8. The second end of inductor L1 is the first AC output terminal. The second AC output terminal is connected between power transistors Q9 and Q10. A capacitor C2 is connected across the first AC output terminal and the second AC output terminal.

[0035] The second end of inductor L1 is connected to the first DC port through control switch K1. The second AC output terminal is connected between power transistors Q9 and Q10. A capacitor C3 is connected across the first DC output terminal and the second DC output terminal.

[0036] The positive pole of the battery is connected to the first DC output terminal, and the positive pole of the battery is connected to the second DC output terminal. The battery provides power for all circuits through auxiliary power circuit M4.

[0037] The battery is connected between the first DC output terminal and the second DC output terminal. Specifically, the battery is a 60V battery. The positive pole of the battery is connected to the first DC output terminal, and the negative pole of the battery is connected to the second DC output terminal.

[0038] The power transistors Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, and Q10 are all N-channel MOS transistors.

[0039] The working process of the present utility model is as follows:

[0040] The control process of battery reverse-dragging start is as follows:

[0041] When the battery reverse-drags to drive the engine to rotate, the control unit controls the switch K1 to close, and the AC-DC conversion circuit is configured in the DC boost output mode to provide DC boost to the integrated starting and generating circuit. The control unit turns on the power transistor Q10 and turns off the power transistor Q9, so that the capacitor C1, the power transistors Q7, Q8, and the inductor L1 form a boost circuit, and the control unit controls the boost circuit to provide boost for the first power supply port and the second power supply port. Specifically, the control unit drives the power transistors Q7 and Q8 to provide boost for the first power supply port, so that the voltage between the first power supply port and the second power supply port increases, and a stable and reliable DC400±20V voltage is obtained.

[0042] The integrated starting and generating circuit is configured in the three-phase inverter mode. The power transistors Q1, Q2, Q3, Q4, Q5, and Q6 form a three-phase BLDC drive circuit module. The control unit drives the power transistors Q1, Q2, Q3, Q4, Q5, and Q6 through the three-phase sensorless BLDC algorithm, so that the three-phase BLDC drive circuit module converts the direct current at the first power supply port into three-phase electricity and connects it to the engine, realizing the reverse-dragging start control of the engine.

[0043] The control process of the engine DC output is as follows:

[0044] When the engine is ignited, the control unit controls the switch K1 to close, the control unit controls the power transistor Q10 to turn on and the power transistor Q9 to turn off. The control unit adjusts the integrated starting and generating circuit to the three-phase rectification mode, and the control unit drives the three power transistors Q1, Q2, Q3, Q4, Q5, and Q6 through the three-phase synchronous rectification algorithm to achieve three-phase rectification, so that the voltage between the first DC output terminal and the second DC output terminal is 400±20Vdc.

[0045] At the same time, the AC-DC conversion circuit is adjusted to the low-voltage DC output mode, and the control unit uses the power transistors Q7 and Q8 for BUCK control to ensure that the voltage between the first DC output terminal and the second DC output terminal is 60V.

[0046] The control process of the AC output mode is as follows:

[0047] After the engine is ignited, the control unit controls the power transistor Q10 to turn on and the switch K1 to turn off, and adjusts the inductance of the inductor L1 through the tap.

[0048] The control unit adjusts the integrated excitation circuit to the three-phase rectification mode. The control unit drives the six power transistors Q1, Q2, Q3, Q4, Q5, and Q6 through the three-phase synchronous rectification algorithm to achieve three-phase rectification, so that the voltage between the first DC output terminal and the second DC output terminal is 400 ± 20 Vdc.

[0049] The control unit adjusts the AC-DC conversion circuit to the AC voltage output mode. The power transistors Q7, Q8, Q9, and Q10 form a full-bridge drive circuit. The control unit controls the power transistors Q7, Q8, Q9, and Q10 through the full-bridge drive algorithm, so that the full-bridge drive circuit realizes full-bridge AC output.

[0050] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0051] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A high-density integrated reverse-drag start AC / DC integrated controller, characterized in that: It includes an engine, an inspiration integrated circuit and an AC-DC conversion circuit which are electrically connected in sequence; The engine is configured in three-phase AC output mode / reverse drag start mode; The AC / DC conversion circuit is configured to provide single-phase AC voltage output / DC boost output / DC buck output; When the engine is in a three-phase AC output mode, the integrated circuit converts the three-phase AC voltage output of the engine into high-voltage DC; The AC / DC conversion circuit converts the high-voltage DC power into unidirectional AC power / low-voltage DC power; When the engine is in the reverse-drag start mode, the AC-DC conversion circuit provides the battery voltage boost to the inspiration integrated circuit; The integrated inspiration circuit converts the boosted high-voltage direct current into three-phase alternating current to reverse start the engine.

2. According to claim 1, a high-density integrated AC / DC integrated controller for reverse start, characterized in that: The control unit is used to control the integrated circuit to realize three-phase rectification / three-phase inversion, and the AC / DC conversion circuit realizes single-phase AC voltage output / DC boost output / DC buck output.

3. According to claim 2, a high-density integrated AC / DC integrated controller for reverse start, characterized in that: The inspiration integrated circuit is a three-phase bridge control circuit composed of power tube Q1, power tube Q2, power tube Q3, power tube Q4, power tube Q5 and power tube Q6; The source of the power tube Q1 is connected to the drain of the power tube Q2, the source of the power tube Q3 is connected to the drain of the power tube Q4, and the source of the power tube Q5 is connected to the drain of the power tube Q6; The drains of the power tubes Q1, Q3 and Q5 are all connected to the positive electrode of the first power port, the sources of the power tubes Q2, Q4 and Q6 are all connected to the negative electrode of the first power port, and a capacitor C1 is connected in series between the positive electrode of the first power port and the negative electrode of the first power port; The U-phase end of the engine is connected to the common end of the power tube Q1 and the power tube Q2, the V-phase end of the engine is connected to the common end of the power tube Q3 and the power tube Q4, and the W-phase end of the engine is connected to the common end of the power tube Q5 and the power tube Q6.

4. According to claim 3, a high-density integrated AC / DC integrated controller for reverse start, characterized in that: The AC-DC conversion circuit includes a power tube Q7, a power tube Q8, a power tube Q9 and a power tube Q10; The source of the power tube Q7 is connected to the drain of the power tube Q8, the source of the power tube Q9 is connected to the drain of the power tube Q10, the drains of the power tubes Q7 and Q9 are both connected to the positive electrode of the first power port, and the drains of the power tubes Q8 and Q10 are both connected to the positive electrode of the first power port; The first end of the inductor L1 is connected between the power tube Q7 and the power tube Q8, the second end of the inductor L1 is the first AC output end, the second AC output end is connected between the power tube Q9 and the power tube Q10, and a capacitor C2 is connected between the first AC output end and the second AC output end; The second end of the inductor L1 is connected to the first DC output port via the control switch K1 , and the second DC output end is connected between the power tube Q9 and the power tube Q10 .

5. According to claim 4, a high-density integrated reverse-drag start AC / DC integrated controller, characterized in that: The battery is connected between the first DC output terminal and the second DC output terminal, the positive electrode of the battery is connected to the first DC output terminal, and the positive electrode of the battery is connected to the second DC output terminal; The battery is connected between the first DC output terminal and the second DC output terminal. Specifically, the battery is a 60V battery, the positive electrode of the battery is connected to the first DC output terminal, and the negative electrode of the battery is connected to the second DC output terminal.

6. The high-density integrated reverse-start AC / DC integrated controller according to claim 5, characterized in that: A capacitor C3 is connected between the first DC output terminal and the second DC output terminal.

Images