Portable storage battery starting control system and method for helicopter

Abstract

The invention provides a portable storage battery starting control system and method for a helicopter, and belongs to the technical field of aircraft power system design. In the system, a portable storage battery pack is connected with a series starting distribution box; the first storage battery pack is connected with the direct-current power supply distribution box and the bus bar power controller; the second storage battery pack is connected with the direct-current power supply distribution box and the bus bar power controller; the direct-current power supply distribution box is connected with the bus bar power controller and the series starting distribution box; the series starting distribution box is connected with the bus bar power controller; the three-phase static converter is connected with the series starting distribution box and the starting electrical switch board; the bus bar power controller is connected with the starting electrical switch board. The three storage battery packs are connected in series, boosted and started and then are converted into two storage battery packs to supply power in parallel, so that the cadmium-nickel storage battery pack of the original machine can meet normal voltage output in a high-rate discharge state.

Description

Technical Field

[0001] The invention belongs to the technical field of aircraft power system design, and in particular relates to a portable battery starting control system and method for a helicopter. Background Art

[0002] After a certain type of helicopter was equipped with a certain type of engine, in order to achieve its high-power starting requirements and precise torque control, the starting control system adopted AC variable frequency starting technology.

[0003] Compared with the traditional low-voltage 30V DC starting technology, the AC variable frequency starting technology has the disadvantage of large generated electromotive force in the later stage of starting. In order to offset the back electromotive force, the starting power demand will also be greater. Its starting characteristics are manifested in a small instantaneous input power value at starting, which gradually increases afterwards, and the high power time is relatively long, resulting in the original cadmium nickel battery pack being unable to meet the normal voltage output under a high-rate discharge state. Summary of the invention

[0004] In order to solve the problem that the original machine cadmium nickel battery pack cannot meet the normal voltage output under the high-rate discharge state, the present invention is proposed in the design of a certain type of helicopter power replacement starting system. While keeping the weight of the helicopter unchanged, a portable battery pack is added as a ground support equipment, and it is combined with the two battery packs on the aircraft using a series control method to increase the starting voltage, thereby reducing the starting current and line voltage drop, and improving the starting ability of the battery pack, so that the original machine cadmium nickel battery pack can meet the normal voltage output under the high-rate discharge state. The technical solution is as follows:

[0005] In a first aspect, a portable battery starting control system for a helicopter is provided, comprising: a portable battery pack, two battery packs, a DC power distribution box, a series starting distribution box, a three-phase static converter, a busbar power controller, and a starting electrical switch board, wherein the two battery packs are a first battery pack and a second battery pack;

[0006] The portable battery pack is connected to the series starting power distribution box as ground support equipment, which is dedicated to providing DC power for engine starting; after starting is completed, the connection with the series starting power distribution box is disconnected;

[0007] The first battery pack is connected to the DC power distribution box, and outputs DC power to provide DC power for engine starting and whole machine emergency; the first battery pack is also connected to the bus bar power controller, and transmits parameter, status and fault communication information to the bus bar power controller;

[0008] The second battery pack is connected to the DC power distribution box, and outputs DC power to provide DC power for engine starting and whole machine emergency; the second battery pack is also connected to the bus bar power controller, and transmits parameter, status and fault communication information to the bus bar power controller;

[0009] The DC power distribution box is connected to the first battery pack to receive the DC low-voltage power provided by the first battery pack; the DC power distribution box is connected to the second battery pack to receive the DC low-voltage power provided by the second battery pack; the DC power distribution box is connected to the bus power controller to receive the contactor control instruction output by the bus power controller and control the system circuit; the DC power distribution box is also connected to the series starting distribution box to complete the connection of the system circuit;

[0010] The series starting power distribution box is connected to the portable battery pack to receive the DC low-voltage power provided by the portable battery pack; the series starting power distribution box is connected to the bus bar power controller to receive the contactor control command output by the bus bar power controller to control the system circuit;

[0011] The three-phase static converter is connected to the series starting power distribution box, receives the high-voltage DC power provided by the series starting power distribution box, and converts it into a three-phase AC power through DC / AC; the three-phase static converter is also connected to the starting electrical switch board, receives the control signal output by the starting electrical switch board, and determines to convert the output three-phase AC power of the three-phase static converter to provide it to the AC variable frequency starting system for use;

[0012] The busbar power controller is connected to the starting electrical switch board, receives a switch control instruction from the starting electrical switch board, and determines the starting state of the battery.

[0013] In the present invention, the DC power distribution box is used for controlling and protecting the power supply of the DC emergency system, and the DC power distribution box includes a first power supply contactor, a second power supply contactor, a grounding contactor, and a DC emergency bus bar;

[0014] Among them, the first power supply contactor and the second power supply contactor are connected to the DC emergency bus bar to complete the control and connectivity of the internal DC power supply circuit; the grounding contactor is used to complete the control and connectivity of the internal grounding circuit.

[0015] In the present invention, the series starting power distribution box is used for controlling and protecting the power supply for engine starting, and the series starting power distribution box comprises: a first starting contactor, a second starting contactor, and a starting quick-release interface;

[0016] Among them, the first starting contactor is connected to the starting quick-release interface to complete the control and connectivity of the internal DC power supply circuit; the second starting contactor is used to complete the control and connectivity of the internal DC power supply circuit.

[0017] in,

[0018] In the starting state, after the starting electrical switch board outputs the "starting state" switch control instruction, the busbar power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be disconnected. At this time, the "+" end of the second battery pack is disconnected from the DC emergency bus, and the "-" end of the second battery pack is disconnected from the ground; the busbar power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be connected. At this time, the "+" end of the first battery pack is connected to the "-" end of the portable battery pack, and the "+" end of the portable battery pack is connected to the "-" end of the second battery pack. At this time, the two battery packs form a series state with the portable battery pack, and the series boosted DC power supply is input to the three-phase static inverter. After the internal DC / AC conversion of the three-phase static inverter, the three-phase AC power supply is output to the starting system for use, completing the series starting control of the three battery packs.

[0019] in,

[0020] When in the power supply state, the starting electrical switch board cuts off the "starting state" switch control instruction, and the bus power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be disconnected. At this time, the "+" end of the portable battery pack is disconnected from the "-" end of the second battery pack; the bus power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be connected. At this time, the "+" end of the second battery pack is connected to the DC emergency bus, and the "-" end of the second battery pack is connected to the ground; at this time, the portable battery pack is disconnected from the system, and the first battery pack and the second battery pack are in parallel state, and a DC low-voltage emergency power supply is output to the DC emergency bus to complete the parallel power supply control of the two battery packs.

[0021] Secondly, a portable battery starting control method is provided. The portable battery is used as a ground support equipment. When starting, the portable battery pack is connected to the series starting distribution box, and forms a series configuration with two battery packs to complete the engine starting power supply; when supplying power, the portable battery pack is quickly disconnected, and the two battery packs are restored to the parallel configuration to complete the emergency power supply.

[0022] In the starting state, after the starting electrical switch board outputs the "starting state" switch control instruction, the busbar power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be disconnected. At this time, the "+" end of the second battery pack is disconnected from the DC emergency bus, and the "-" end of the second battery pack is disconnected from the ground; the busbar power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be connected. At this time, the "+" end of the first battery pack is connected to the "-" end of the portable battery pack, and the "+" end of the portable battery pack is connected to the "-" end of the second battery pack. At this time, the two battery packs form a series state with the portable battery pack, and the series boosted DC power supply is input to the three-phase static inverter. After the internal DC / AC conversion of the three-phase static inverter, the output three-phase AC power supply is controlled to be used by the starting system, and the series starting control of the three battery packs is completed.

[0023] When in the power supply state, the starting electrical switch board cuts off the "starting state" switch control instruction, and the bus power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be disconnected. At this time, the "+" end of the portable battery pack is disconnected from the "-" end of the second battery pack; the bus power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be connected. At this time, the "+" end of the second battery pack is connected to the DC emergency bus, and the "-" end of the second battery pack is connected to the ground; at this time, the portable battery pack is disconnected from the system, and the first battery pack and the second battery pack are in parallel state, and a DC low-voltage emergency power supply is output to the DC emergency bus, completing the parallel power supply control system of the two battery packs.

[0024] The beneficial effects of the present invention are at least:

[0025] Compared with the traditional low-voltage 30V DC starting technology, the AC variable frequency starting technology has the disadvantage of large generated electromotive force in the later stage of starting, which causes the starting power requirement to increase exponentially. By adding a portable battery pack as ground support equipment while keeping the weight of the helicopter unchanged, and combining it with the two battery packs on board using a series control method, the starting voltage can be increased, thereby reducing the starting current and line voltage drop, and improving the starting ability of the battery pack, so that the original cadmium nickel battery pack can meet the normal voltage output under a large rate discharge state. The portable battery starting control system and method of the present invention realizes the technical effect of converting three battery packs into parallel power supply after starting with a series boost connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1This is a schematic diagram of the portable battery starting control system of the present invention;

[0027] Figure 2 This is a schematic diagram of the starting principle of three battery packs connected in series;

[0028] Figure 3 This is a schematic diagram of the power supply principle of two battery groups connected in parallel. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below through specific implementation modes and drawings.

[0030] See also Figure 1 A portable battery starting control system provided by one embodiment of the present invention includes a portable battery pack, two battery packs, a DC power supply distribution box, a series starting distribution box, a three-phase static inverter, a busbar power controller, and a starting electrical switch board.

[0031] 1) Two 24V / 25Ah nickel-cadmium battery packs are connected to the DC power distribution box and the busbar power controller, outputting 24V DC power to the DC power distribution box and transmitting parameter, status and fault communication information to the busbar power controller.

[0032] 2) A 24V / 25Ah portable nickel-cadmium battery pack is connected to the series starting distribution box as a ground support device, specifically outputting 24V DC power to the series starting distribution box for starting power.

[0033] 3) A DC power distribution box, including a first power contactor, a second power contactor, a grounding contactor, and a DC emergency bus bar. The first power contactor and the second power contactor are connected to the DC emergency bus bar to achieve control and connectivity of the internal DC power supply circuit; the grounding contactor is used to achieve control and connectivity of the internal grounding circuit; together they form the control and protection of the DC emergency system power supply.

[0034] 4) A series starting power distribution box, including a first starting contactor, a second contactor, and a starting quick release interface. The first starting contactor is connected to the starting quick release interface to achieve control and connectivity of the internal DC power supply circuit; the second starting contactor is used to achieve control and connectivity of the internal DC power supply circuit; together they form a control protection for engine starting power supply.

[0035] 5) A three-phase static converter is connected to the series starting distribution box and the starting electrical switch board, receives the 72V DC power supply from the series starting distribution box, and outputs a three-phase 115V / 400Hz AC power supply after DC / AC conversion to provide power for the AC variable frequency starting system.

[0036] 6) A busbar power controller is connected to two battery packs, a DC power distribution box, a series starting distribution box, and a starting electrical switch board to achieve control, protection, and status monitoring of the battery pack starting system.

[0037] 7) A starting electrical switchboard is connected to the busbar power controller and the three-phase static converter, and outputs a "start" switch control instruction to the busbar power controller and the three-phase static converter.

[0038] The main component parameters of the present invention are as follows:

[0039] 1) Battery pack

[0040] Rated voltage: 24V

[0041] Rated capacity: 3×25Ah

[0042] 2) Three-phase static converter

[0043] Input voltage: 36~84VDC

[0044] Output voltage: 115±3VAC

[0045] Output frequency: 400±6Hz

[0046] Output power: 15kVA

[0047] Overload capacity: When the load current is twice the rated current, it should continue to work normally for at least 30 seconds

[0048] With output overvoltage, overload, short circuit and input reverse polarity protection functions

[0049] With overheat protection function and output overheat alarm signal

[0050] 3) Busbar power controller

[0051] Working voltage: 18~30VDC

[0052] Detection function: Able to detect control switches, control contactors, voltage, and current signals

[0053] Protection function: contactor protection, voltage protection

[0054] Management functions: DC bus connection, contactor control management

[0055] Communication function: communicate with battery pack and electromechanical management system via RS422A bus.

[0056] In an embodiment of the present invention, a portable battery is used as a ground support equipment. When starting, the portable battery pack is connected to the series starting distribution box to form a series configuration with two battery packs to realize engine starting power supply; when supplying power, the portable battery pack is quickly disconnected, and the two battery packs are restored to a parallel configuration to realize emergency power supply.

[0057] 1) Starting series control principle

[0058] See also Figure 2 , in the starting state, turn on the "starting power supply" switch on the starting electrical switch board; the busbar power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be disconnected. At this time, the "+" end of the second battery pack is disconnected from the DC emergency bus, and the "-" end of the second battery pack is disconnected from the ground; the busbar power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be connected. At this time, the "+" end of the first battery pack is connected to the "-" end of the portable battery pack. The voltage of the "+" end of the first battery pack is 24VDC, and the portable The voltage at the "+" end of the portable battery pack is 48VDC, and at the same time, the "+" end of the portable battery pack is connected to the "-" end of the second battery pack, and the voltage at the "+" end of the second battery pack is 72VDC. At this time, the two battery packs and the portable battery pack form a series connection state, and the series-boosted DC power supply is input to the three-phase static inverter, which is converted into a three-phase 115V / 400Hz AC power supply through the three-phase static inverter DC / AC; after the three-phase static inverter receives the "starting power supply" switch control instruction at the same time, the three-phase static inverter is controlled to output the three-phase 115V / 400Hz AC power supply to the starting system; together, the three battery packs are connected in series to realize the starting control system.

[0059] During the entire process, the DC emergency bus is powered solely by the first battery pack, which does not affect the normal 24V emergency power supply on the aircraft.

[0060] 2) Power supply parallel control principle

[0061] See also Figure 3, disconnect the "starting power supply" switch on the starting electrical switch board, the busbar power controller outputs a contactor control instruction to the series starting distribution box, controls the first starting contactor and the second starting contactor in the series starting distribution box to be disconnected, and at this time the "+" end of the portable battery pack is disconnected from the "-" end of the second battery pack; the busbar power controller outputs a contactor control instruction to the DC power supply distribution box, and the contactor control instruction controls the second power supply contactor and the grounding contactor in the DC power supply distribution box to be connected, and at this time the "+" end of the second battery pack is connected to the DC emergency bus, and the "-" end of the second battery pack is connected to the ground; at this time, the portable battery pack is disconnected from the system, and the first battery pack and the second battery pack are in parallel state, and a DC 24V emergency power supply is output to the DC emergency bus; together, a parallel power supply control system for two battery packs is realized.

[0062] The portable battery pack can now be detached and removed via the starter quick-release interface.

[0063] The above only expresses the implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. In addition, the parts not detailed in the present invention are all conventional technologies.

Claims

1. A portable battery starting control system for a helicopter, characterized in that: include: a portable battery pack, two battery packs, a DC power distribution box, a series starting distribution box, a three-phase static converter, a busbar power controller, and a starting electrical switchboard, wherein the two battery packs are a first battery pack and a second battery pack; The portable battery pack is connected to the series starting power distribution box; After starting is complete, disconnect the connection to the series starting distribution box; The first battery pack is connected to the DC power distribution box, and outputs DC power to provide DC power for engine starting and whole machine emergency; the first battery pack is also connected to the bus bar power controller, and transmits parameter, status and fault communication information to the bus bar power controller; The second battery pack is connected to the DC power distribution box, and outputs DC power to provide DC power for engine starting and whole machine emergency; the second battery pack is also connected to the bus bar power controller, and transmits parameter, status and fault communication information to the bus bar power controller; The DC power supply distribution box is connected to the busbar power controller, receives the contactor control command output by the busbar power controller, and controls the system circuit; the DC power supply distribution box is also connected to the series starting distribution box to complete the connection of the system circuit; The series starting distribution box is connected to the busbar power controller, receives the contactor control command output by the busbar power controller, and controls the system circuit; The three-phase static converter is connected to the series starting power distribution box, receives the high-voltage DC power provided by the series starting power distribution box, and converts it into a three-phase AC power through DC / AC; the three-phase static converter is also connected to the starting electrical switch board, receives the control signal output by the starting electrical switch board, and determines to convert the output three-phase AC power of the three-phase static converter to provide it to the AC variable frequency starting system for use; The busbar power controller is connected to the starting electrical switch board, receives a switch control instruction from the starting electrical switch board, and determines the starting state of the battery.

2. The system according to claim 1, characterized in that The DC power distribution box is used for the control and protection of the DC emergency system power supply. The DC power distribution box includes a first power supply contactor, a second power supply contactor, a grounding contactor, and a DC emergency bus bar; Among them, the first power supply contactor and the second power supply contactor are connected to the DC emergency bus bar to complete the control and connectivity of the internal DC power supply circuit; the grounding contactor is used to complete the control and connectivity of the internal grounding circuit.

3. The system according to claim 2, characterized in that The series starting distribution box is used for the control and protection of the engine starting power supply. The series starting distribution box includes: a first starting contactor, a second starting contactor, and a starting quick release interface; Among them, the first starting contactor is connected to the starting quick-release interface to complete the control and connectivity of the internal DC power supply circuit; the second starting contactor is used to complete the control and connectivity of the internal DC power supply circuit.

4. The system according to claim 3, characterized in that In the starting state, after the starting electrical switch board outputs the "starting state" switch control instruction, the busbar power controller outputs the contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be disconnected. At this time, the "+" end of the second battery group is disconnected from the DC emergency bus, and the "-" end of the second battery group is disconnected from the ground; the busbar power controller outputs the contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be connected. At this time, the "+" end of the first battery group is connected to the "-" end of the portable battery group, and the "+" end of the portable battery group is connected to the "-" end of the second battery group. At this time, the two battery groups form a series state with the portable battery group, and the series boosted DC power supply is input to the three-phase static inverter. After the internal DC / AC conversion of the three-phase static inverter, the three-phase AC power supply is output to the starting system for use, completing the series starting control of the three battery groups.

5. The system according to claim 3, characterized in that When in the power supply state, the starting electrical switch board cuts off the "starting state" switch control instruction, and the busbar power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be disconnected. At this time, the "+" end of the portable battery pack is disconnected from the "-" end of the second battery pack; the busbar power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be connected. At this time, the "+" end of the second battery pack is connected to the DC emergency bus, and the "-" end of the second battery pack is connected to the ground; at this time, the portable battery pack is disconnected from the system, and the first battery pack and the second battery pack are in parallel state, and the DC low-voltage emergency power supply is output to the DC emergency bus, completing the parallel power supply control of the two battery packs.

6. A portable battery starting control method, characterized in that: As ground support equipment, when starting, the portable battery pack is connected to the series starting distribution box and forms a series configuration with the two battery packs to complete the engine starting power supply; when supplying power, the portable battery pack is quickly disconnected and the two battery packs are restored to the parallel configuration to complete the emergency power supply.

7. The method according to claim 6, characterized in that In the starting state, after the starting electrical switch board outputs the "starting state" switch control instruction, the busbar power controller outputs the contactor control instruction to the DC power supply distribution box, and controls the second power supply contactor and the grounding contactor in the DC power supply distribution box to be disconnected. At this time, the "+" end of the second battery group is disconnected from the DC emergency bus, and the "-" end of the second battery group is disconnected from the ground; the busbar power controller outputs the contactor control instruction to the series starting distribution box, and controls the first starting contactor and the second starting contactor in the series starting distribution box to be connected. At this time, the "+" end of the first battery group is connected to the "-" end of the portable battery group, and the "+" end of the portable battery group is connected to the "-" end of the second battery group. At this time, the two battery groups form a series state with the portable battery group, and the series boosted DC power supply is input to the three-phase static inverter. After the internal DC / AC conversion of the three-phase static inverter, the output three-phase AC power supply is controlled to be used by the starting system, and the series starting control of the three battery groups is completed.

8. The method according to claim 6, characterized in that When in the power supply state, the starting electrical switch board cuts off the "starting state" switch control instruction, and the busbar power controller outputs a contactor control instruction to the series starting distribution box to control the first starting contactor and the second starting contactor in the series starting distribution box to be disconnected. At this time, the "+" end of the portable battery pack is disconnected from the "-" end of the second battery pack; the busbar power controller outputs a contactor control instruction to the DC power supply distribution box to control the second power supply contactor and the grounding contactor in the DC power supply distribution box to be connected. At this time, the "+" end of the second battery pack is connected to the DC emergency bus, and the "-" end of the second battery pack is connected to the ground; at this time, the portable battery pack is disconnected from the system, and the first battery pack and the second battery pack are in parallel state, and a DC low-voltage emergency power supply is output to the DC emergency bus, completing the parallel power supply control system of the two battery packs.

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