A special vehicle water-cooled power generation system and a low-temperature water dispersion matching control circuit

Abstract

The present application belongs to the field of automatic control technology, and particularly relates to a matching control circuit of a water-cooled power generation system and a low-temperature water radiator for special vehicles, which comprises a power generation system, an electrical integrated control box, a driver operation panel, an electronic water pump of a low-temperature water circulation system and a controller thereof, a low-temperature water radiator inlet temperature sensor and a low-temperature water radiator outlet temperature sensor. The technical scheme of the present application relates to power output and voltage stabilization control of the power generation system, matching control of power output of the power generation system and temperature of the low-temperature water radiator, and function control of the power generation system for reduced output when the low-temperature water radiator system fails. The matching control of the power generation system and the cooling circulation system is used to realize stable and reliable operation of the power generation system.

Description

Technical Field

[0001] This invention belongs to the field of automatic control technology, specifically relating to a matching control circuit for a water-cooled power generation system and a cryogenic water radiator for special vehicles. Background Technology

[0002] Permanent magnet synchronous motors (PMSMs) boast high power density and simple structure. With the development of PMSM control technology and the application of electric hybrid drive and all-electric drive technologies in special vehicles, PMSM power generation technology is gradually becoming the primary power supply equipment for these vehicles. However, because PMSM generators and controllers require a water circulation system for cooling, when the water temperature in the circulation system rises above 75°C, the temperature of the generator controller's power devices can rise to 80°C–90°C, affecting the DC power output of the power generation system and its reliability. When the water temperature in the circulation system rises above 85°C, it may trigger the over-temperature protection of the power generation system, causing the generator controller to shut down its DC output, severely impacting the overall operation of the special vehicle. Therefore, it is necessary to design a matching control circuit between the power generation system and the low-temperature water cooling system to ensure normal power output and improve the stability and reliability of the vehicle's power grid. Summary of the Invention

[0003] (a) Technical problems to be solved The technical problems to be solved by this invention are: (1) how to achieve reliable power supply for special vehicles; (2) how to improve the reliability of the power generation system; and (3) how to achieve de-rating of the power generation system under special working conditions.

[0004] (II) Technical Solution To solve the above technical problems, the present invention provides a matching control circuit for a water-cooled power generation system and a cryogenic water heater for special vehicles. The matching control circuit includes: a power generation system, an electrical integrated control box, a driver's operating panel, an electronic water pump and its controller for a cryogenic water circulation system, a cryogenic water heater inlet temperature sensor, and a cryogenic water heater outlet temperature sensor. The power generation system is used to realize power generation, voltage stabilization control and fault protection. It includes a permanent magnet synchronous generator and a generator controller. The permanent magnet synchronous generator is used to convert mechanical energy into electrical energy to provide continuous power to the vehicle. The generator controller is used to control the permanent magnet generator, rectify the electrical energy output by the permanent magnet generator, and control constant voltage or constant power according to the engine speed. It also provides overvoltage, undervoltage, overcurrent and overtemperature protection control according to the capabilities of the generator and the generator controller. The electrical integrated control box is used to realize 28V power distribution management, as well as the acquisition and processing of inlet and outlet temperatures, voltage and I / O signals of the low-temperature water heater, and to upload power distribution and acquisition information through the bus; The driver's control panel is used for human-machine interaction and involves power-on and power-off control, as well as power-on and power-off control of important electrical equipment in the chassis. The electronic water pump is used to circulate the water in the cryogenic ring to provide coolant for the generator and generator controller; the electronic water pump is divided into a low-pressure water pump and a high-pressure water pump. The controller of the electronic water pump is used to provide power to the electronic water pump and ensure that the electronic water pump operates continuously and stably. The cryogenic water heater inlet temperature sensor is used to measure the inlet temperature of the cryogenic water heater. The cryogenic water heater outlet temperature sensor is used to measure the outlet temperature of the cryogenic water heater.

[0005] The operation of the control circuit includes: (1) constant pressure and power control of the power generation system; (2) power control based on low heat dissipation water temperature; and (3) voltage reduction output control when the low heat dissipation water circulation system fails.

[0006] (1) In the constant voltage and power control of the power generation system, specifically: When the speed of the permanent magnet synchronous generator is ≥1600rpm, the positive group voltage of the generator controller is stable at +28±0.7V; the negative group voltage is stable at -28±0.7V; the positive group output current limit is 215A, i.e., output power ≥6kW, for a duration of 5min; the positive group output current limit is 75A, i.e., output power ≥2kW; the negative group output current limit is 145A, i.e., output power ≥4kW, for a duration of 5min; the negative group output current limit is 40A, i.e., output power ≥1kW.

[0007] In the constant voltage and power control of the power generation system, when the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive group current-limited output is 430A, that is, the output power is ≥12kW, and the output voltage is stable at +28±0.7V; the negative group current-limited output is 290A, that is, the output power is ≥8kW, and the output voltage is stable at +28±0.7V.

[0008] (2) In power control based on low diffused water temperature, specifically: When the inlet temperature of the low-temperature water is ≤70℃, the temperature of the generator controller power module is ≤80℃, and the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive current limit is 430A, that is, the output power is ≥12kW, and the negative current limit is 290A, that is, the output power is ≥8kW.

[0009] When the inlet temperature of the diffuser water is ≤80℃, the temperature of the generator controller power module is ≤90℃, and the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive current limit is 215A, that is, the output power is ≥6kW, and the negative current limit is 145A, that is, the output power is ≥4kW.

[0010] When the inlet temperature of the diffuser water is ≥80℃ and the temperature of the generator controller power module is ≥95℃, the permanent magnet synchronous generator will perform over-temperature protection and shut off the voltage output of the positive and negative groups.

[0011] (3) In the case of a low-pressure water circulation system failure, the pressure reduction output control is as follows: When the temperature difference between the low-temperature inlet and outlet of the low-temperature distributed water is ≥30℃, the power generation system will dragged out, meaning that when the speed of the permanent magnet synchronous generator is ≥1600rpm, the positive output power will be ≤3kW and the negative output power will be ≤2kW; when the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive output power will be ≤6kW and the negative output power will be ≤4kW; when the temperature of the generator controller power module is ≥95℃, the generator will shut off its power output.

[0012] (III) Beneficial Effects Compared with the prior art, the technical solution of the present invention involves the power output and voltage regulation control of the power generation system, the matching control of the power output of the power generation system and the temperature of the low-temperature water heater, and the derating output function control of the power generation system when the low-temperature water heater system fails; the solution achieves stable and reliable operation of the power generation system through the matching control of the power generation system and the cooling circulation system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the matching control circuit between the water-cooled power generation system and the low-temperature water radiator of the present invention. Detailed Implementation

[0014] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0015] To solve the above technical problems, the present invention provides a matching control circuit for a water-cooled power generation system and a cryogenic water heater for special vehicles. The matching control circuit includes: a power generation system, an electrical integrated control box, a driver's operating panel, an electronic water pump and its controller for a cryogenic water circulation system, a cryogenic water heater inlet temperature sensor, and a cryogenic water heater outlet temperature sensor. The power generation system is used to realize power generation, voltage stabilization control and fault protection. It includes a permanent magnet synchronous generator and a generator controller. The permanent magnet synchronous generator is used to convert mechanical energy into electrical energy to provide continuous power to the vehicle. The generator controller is used to control the permanent magnet generator, rectify the electrical energy output by the permanent magnet generator, and control constant voltage or constant power according to the engine speed. It also provides overvoltage, undervoltage, overcurrent and overtemperature protection control according to the capabilities of the generator and the generator controller. The electrical integrated control box is used to realize 28V power distribution management, as well as the acquisition and processing of inlet and outlet temperatures, voltage and I / O signals of the low-temperature water heater, and to upload power distribution and acquisition information through the bus; The driver's control panel is used for human-machine interaction and involves power-on and power-off control, as well as power-on and power-off control of important electrical equipment in the chassis. The electronic water pump is used to circulate the water in the cryogenic ring to provide coolant for the generator and generator controller; the electronic water pump is divided into a low-pressure water pump and a high-pressure water pump. The controller of the electronic water pump is used to provide power to the electronic water pump and ensure that the electronic water pump operates continuously and stably. The cryogenic water heater inlet temperature sensor is used to measure the inlet temperature of the cryogenic water heater. The cryogenic water heater outlet temperature sensor is used to measure the outlet temperature of the cryogenic water heater.

[0016] The operation of the control circuit includes: (1) constant pressure and power control of the power generation system; (2) power control based on low heat dissipation water temperature; and (3) voltage reduction output control when the low heat dissipation water circulation system fails.

[0017] (1) In the constant voltage and power control of the power generation system, specifically: When the speed of the permanent magnet synchronous generator is ≥1600rpm, the positive group voltage of the generator controller is stable at +28±0.7V; the negative group voltage is stable at -28±0.7V; the positive group output current limit is 215A, i.e., output power ≥6kW, for a duration of 5min; the positive group output current limit is 75A, i.e., output power ≥2kW; the negative group output current limit is 145A, i.e., output power ≥4kW, for a duration of 5min; the negative group output current limit is 40A, i.e., output power ≥1kW.

[0018] In the constant voltage and power control of the power generation system, when the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive group current-limited output is 430A, that is, the output power is ≥12kW, and the output voltage is stable at +28±0.7V; the negative group current-limited output is 290A, that is, the output power is ≥8kW, and the output voltage is stable at +28±0.7V.

[0019] (2) In power control based on low diffused water temperature, specifically: When the inlet temperature of the low-temperature water is ≤70℃, the temperature of the generator controller power module is ≤80℃, and the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive current limit is 430A, that is, the output power is ≥12kW, and the negative current limit is 290A, that is, the output power is ≥8kW.

[0020] When the inlet temperature of the diffuser water is ≤80℃, the temperature of the generator controller power module is ≤90℃, and the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive current limit is 215A, that is, the output power is ≥6kW, and the negative current limit is 145A, that is, the output power is ≥4kW.

[0021] When the inlet temperature of the diffuser water is ≥80℃ and the temperature of the generator controller power module is ≥95℃, the permanent magnet synchronous generator will perform over-temperature protection and shut off the voltage output of the positive and negative groups.

[0022] (3) In the case of a low-pressure water circulation system failure, the pressure reduction output control is as follows: When the temperature difference between the low-temperature inlet and outlet of the low-temperature distributed water is ≥30℃, the power generation system will dragged out, meaning that when the speed of the permanent magnet synchronous generator is ≥1600rpm, the positive output power will be ≤3kW and the negative output power will be ≤2kW; when the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive output power will be ≤6kW and the negative output power will be ≤4kW; when the temperature of the generator controller power module is ≥95℃, the generator will shut off its power output.

[0023] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A matching control circuit for a water-cooled power generation system and a cryogenic water radiator for special vehicles, characterized in that, The matching control circuit includes: a power generation system, an electrical integrated control box, a driver's operating panel, an electronic water pump and its controller for a cryogenic water circulation system, a cryogenic water inlet temperature sensor, and a cryogenic water outlet temperature sensor. The power generation system is used to realize power generation, voltage stabilization control and fault protection. It includes a permanent magnet synchronous generator and a generator controller. The permanent magnet synchronous generator is used to convert mechanical energy into electrical energy to provide continuous power to the vehicle. The generator controller is used to control the permanent magnet generator, rectify the electrical energy output by the permanent magnet generator, and control constant voltage or constant power according to the engine speed. It also provides overvoltage, undervoltage, overcurrent and overtemperature protection control according to the capabilities of the generator and the generator controller. The electrical integrated control box is used to realize 28V power distribution management, as well as the acquisition and processing of inlet and outlet temperatures, voltage and I / O signals of the low-temperature water heater, and to upload power distribution and acquisition information through the bus; The driver's control panel is used for human-machine interaction and involves power-on and power-off control, as well as power-on and power-off control of important electrical equipment in the chassis. The electronic water pump is used to circulate the water in the cryogenic ring to provide coolant for the generator and generator controller; the electronic water pump is divided into a low-pressure water pump and a high-pressure water pump. The controller of the electronic water pump is used to provide power to the electronic water pump and ensure that the electronic water pump operates continuously and stably. The cryogenic water heater inlet temperature sensor is used to measure the inlet temperature of the cryogenic water heater. The cryogenic water heater outlet temperature sensor is used to measure the outlet temperature of the cryogenic water heater.

2. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 1, characterized in that, The operation of the control circuit includes: (1) constant pressure and power control of the power generation system; (2) power control based on low heat dissipation water temperature; and (3) voltage reduction output control when the low heat dissipation water circulation system fails.

3. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 2, characterized in that, (1) In the constant voltage and power control of the power generation system, specifically: When the speed of the permanent magnet synchronous generator is ≥1600rpm, the positive group voltage of the generator controller is stable at +28±0.7V; the negative group voltage is stable at -28±0.7V; the positive group output current limit is 215A, i.e., output power ≥6kW, for a duration of 5min; the positive group output current limit is 75A, i.e., output power ≥2kW; the negative group output current limit is 145A, i.e., output power ≥4kW, for a duration of 5min; the negative group output current limit is 40A, i.e., output power ≥1kW.

4. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 3, characterized in that, In the constant voltage and power control of the power generation system, when the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive group current-limited output is 430A, that is, the output power is ≥12kW, and the output voltage is stable at +28±0.7V; the negative group current-limited output is 290A, that is, the output power is ≥8kW, and the output voltage is stable at +28±0.7V.

5. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water heater as described in claim 4, characterized in that, (2) In power control based on low diffused water temperature, specifically: When the inlet temperature of the low-temperature water is ≤70℃, the temperature of the generator controller power module is ≤80℃, and the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive current limit is 430A, that is, the output power is ≥12kW, and the negative current limit is 290A, that is, the output power is ≥8kW.

6. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 5, characterized in that, (2) In the power control based on low diffused water temperature, when the diffused water inlet temperature is ≤80℃, the temperature of the generator controller power module is ≤90℃, and the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive current limit is 215A, that is, the output power is ≥6kW, and the negative current limit is 145A, that is, the output power is ≥4kW.

7. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 6, characterized in that, (2) In power control based on low diffused water temperature, when the diffused water inlet temperature is ≥80℃ and the temperature of the generator controller power module is ≥95℃, the permanent magnet synchronous generator performs over-temperature protection and shuts off the voltage output of the positive and negative groups.

8. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 7, characterized in that, (3) In the case of a low-pressure water circulation system failure, the pressure reduction output control is as follows: When the temperature difference between the low-temperature inlet and outlet of the low-temperature distributed water is ≥30℃, the power generation system will dragged out, meaning that when the speed of the permanent magnet synchronous generator is ≥1600rpm, the positive output power will be ≤3kW and the negative output power will be ≤2kW; when the speed of the permanent magnet synchronous generator is ≥3600rpm, the positive output power will be ≤6kW and the negative output power will be ≤4kW; when the temperature of the generator controller power module is ≥95℃, the generator will shut off its power output.

9. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 8, characterized in that, The circuit described belongs to the field of automatic control technology.

10. The matching control circuit for the special vehicle water-cooled power generation system and the cryogenic water radiator as described in claim 8, characterized in that, The circuit achieves stable and reliable operation of the power generation system through the matching control of the power generation system and the cooling cycle system.

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