Power supply control method and device for 24V DC generator set used in trucks

Abstract

The present application discloses a power supply control method for a 24V DC generator set used on a truck, comprising: when the 24V DC generator set is used to supply power to a target on-board electrical device on the truck, the power consumption of the target on-board electrical device is detected to obtain the target power consumption; if the target power consumption is less than a preset power value, the power supply of the 24V DC generator set is adjusted to make the power supply of the 24V DC generator set match the target power consumption. Compared with the prior art, since the method can adjust the power supply of the 24V DC generator set according to the power consumption of the target on-board electrical device on the truck, the 24V DC generator set does not need to be in a high-speed operation state all the time. Therefore, the method can not only reduce the fuel consumption generated by the 24V DC generator set, but also reduce the noise generated by the 24V DC generator set.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and in particular to a power supply control method and device for a 24V DC generator set used on a truck. Background Art

[0002] 24V DC generator sets usually provide power for electrical equipment installed on trucks, including onboard air conditioners, onboard refrigerators, onboard rice cookers, and onboard electric kettles. When the truck driver parks the truck, the 24V DC generator set mainly provides power for all electrical equipment on the truck. Since the onboard battery used in the truck requires a large power supply, while other small electrical equipment requires a small power supply, the 24V DC generator needs to run at a high speed and output a high power supply voltage to meet the normal operation of the onboard electrical equipment on the truck.

[0003] However, in actual applications, there are some power supply scenarios that do not require a 24V DC generator set to power the onboard battery on a truck. Therefore, if the method in the prior art is used to power the onboard electrical equipment on a truck, not only will the 24V DC generator set generate higher fuel consumption, but it will also cause the 24V DC generator set to generate greater noise. Currently, there is no effective solution to the above technical problems. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a power supply control method and device for a 24V DC generator set used on a truck, so as to reduce the fuel consumption of the 24V DC generator set and the noise generated by the 24V DC generator set. The specific scheme is as follows:

[0005] A power supply control method for a 24V DC generator set used on a truck, comprising:

[0006] When the target on-board electrical equipment on the truck is powered by a 24V DC generator set, the power consumption of the target on-board electrical equipment is detected to obtain the target power consumption;

[0007] If the target power consumption is less than the preset power value, the power supply power of the 24V DC generator set is adjusted so that the power supply power of the 24V DC generator set matches the target power consumption.

[0008] Preferably, the process of adjusting the power supply of the 24V DC generator set includes:

[0009] The output speed of the 24V DC generator set is adjusted according to the load current of the 24V DC generator set so that the output voltage of the 24V DC generator set is maintained at the rated voltage of the target on-board electrical equipment.

[0010] Preferably, it also includes:

[0011] If the output voltage of the 24V DC generator set is lower than the rated voltage of the target vehicle electrical equipment, the output speed of the 24V DC generator set is increased so that the output voltage of the 24V DC generator set is maintained at the rated voltage of the target vehicle electrical equipment.

[0012] Preferably, it also includes:

[0013] The output speed of the 24V DC generator set is controlled to be less than a preset speed; wherein the preset speed is a speed set according to the target vehicle-mounted electrical equipment being able to maintain a safe operating state.

[0014] Preferably, it also includes:

[0015] If the load current of the 24V DC generator set is greater than the rated current of the target on-board electrical equipment and the duration exceeds a preset time threshold, it is determined that other on-board electrical equipment on the truck except the target on-board electrical equipment is in operation;

[0016] The output speed of the 24V DC generator set is reduced, and the on-board battery on the truck is used to power the on-board electrical equipment in operation on the truck, so that the output voltage of the 24V DC generator set is consistent with the output voltage of the on-board battery.

[0017] Preferably, it also includes:

[0018] If the output voltage of the vehicle battery is less than a preset voltage value, the output power of the 24V DC generator set is adjusted so that the 24V DC generator set with adjusted power can be used to charge the vehicle battery and supply power to the vehicle electrical equipment in operation on the truck.

[0019] Correspondingly, the present invention also discloses a power supply control device for a 24V DC generator set used on a truck, comprising:

[0020] A three-phase rectifier module is used to rectify the AC power output by the 24V DC generator set to obtain target DC power, and use the target DC power to power the target on-board electrical equipment on the truck;

[0021] A voltage detection module, connected to the three-phase rectifier module, for detecting a target output voltage of the three-phase rectifier module;

[0022] A current detection module, connected to the three-phase rectifier module, and used to detect a target output current of the three-phase rectifier module;

[0023] A speed detection module, connected to the 24V DC generator set, for detecting a target speed of the 24V DC generator set;

[0024] A controller is connected to the voltage detection module, the current detection module and the speed detection module, and is used to adjust the target speed according to the target output voltage and the target output current so that the output power of the 24V DC generator set is adapted to the power consumption of the target on-board electrical equipment.

[0025] Preferably, the rotation speed detection module comprises: a first resistor, a second resistor, a third resistor and a fourth resistor;

[0026] Among them, the first end of the first resistor is connected to the second input end of the three-phase rectifier module, the second end of the first resistor is connected to the first end of the second resistor, the second end of the second resistor is grounded, the first end of the third resistor is connected to the third input end of the three-phase rectifier module, the second end of the third resistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is grounded, and the second end of the first resistor and the second end of the third resistor are also connected to the controller respectively.

[0027] Preferably, the current detection module includes: a fifth resistor and an operational amplifier;

[0028] Among them, the first end of the fifth resistor is respectively connected to the second output end of the three-phase rectifier module and the first input end of the operational amplifier, the second end of the fifth resistor is respectively connected to the target vehicle-mounted electrical equipment and the second input end of the operational amplifier, and the output end of the operational amplifier is connected to the controller.

[0029] Preferably, the voltage detection module comprises: a sixth resistor and a seventh resistor;

[0030] The first end of the sixth resistor is connected to the first output end of the three-phase rectifier module, the second end of the sixth resistor is connected to the controller and the first end of the seventh resistor respectively, and the second end of the seventh resistor is grounded.

[0031] It can be seen that in the present invention, when the 24V DC generator set is used to power the target on-board electrical equipment on the truck, the power consumption of the target on-board electrical equipment is detected to obtain the target power consumption; if the target power consumption is less than the preset power value, it means that the 24V DC generator set does not need to power the on-board battery on the truck. At this time, the power supply power of the 24V DC generator set is adjusted so that the power supply power of the 24V DC generator set can be adapted to the target power consumption required by the target on-board electrical equipment. Compared with the prior art, since this method can adjust the power supply power of the 24V DC generator set according to the power consumption of the target on-board electrical equipment on the truck, it is not necessary for the 24V DC generator set to be in a high-speed operation state all the time. Therefore, this method can not only reduce the fuel consumption generated by the 24V DC generator set, but also reduce the noise generated by the 24V DC generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0033] Figure 1 A flow chart of a power supply control method for a 24V DC generator set used on a truck provided by an embodiment of the present invention;

[0034] Figure 2 A structural diagram of a power supply control device for a 24V DC generator set used on a truck provided by an embodiment of the present invention;

[0035] Figure 3 A structural diagram of another power supply control device for a 24V DC generator set used on a truck provided by an embodiment of the present invention;

[0036] Figure 4 A flow chart of another power supply control method for a 24V DC generator set used on a truck provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1 , Figure 1 A flowchart of a power supply control method for a 24V DC generator set used on a truck provided by an embodiment of the present invention, the method comprising:

[0039] Step S11: when the target onboard electrical equipment on the truck is powered by the 24V DC generator set, the power consumption of the target onboard electrical equipment is detected to obtain the target power consumption;

[0040] Step S12: If the target power consumption is less than the preset power value, the power supply of the 24V DC generator set is adjusted to make the power supply of the 24V DC generator set match the target power consumption.

[0041] In this embodiment, a power supply control method for a 24V DC generator set used on a truck is provided, which can not only reduce the fuel consumption of the 24V DC generator set, but also reduce the noise generated by the 24V DC generator set. The power supply control method is described in detail with the power supply control device of the truck as the execution subject.

[0042] It should be noted that the power supply control method provided in this embodiment can be applied to both the scene condition of the truck parking and the scene condition of the truck running with load. As long as the 24V DC generator set is used to power the target on-board electrical equipment on the truck, the power supply control method provided in this embodiment can be used to control the power output of the 24V DC generator set. Moreover, in this embodiment, the target on-board electrical equipment refers to the on-board electrical equipment additionally installed on the truck.

[0043] In the method, when the target on-board electrical equipment on the truck is powered by the 24V DC generator set, the power supply control device of the truck detects the power consumption of the target on-board electrical equipment and obtains the target power consumption of the target on-board electrical equipment. If the target power consumption of the target on-board electrical equipment is less than the preset power value, the power supply control device of the truck adjusts the power supply of the 24V DC generator set and makes the power supply of the 24V DC generator set compatible with the target power consumption of the target on-board electrical equipment.

[0044] Because the on-board electrical equipment installed on the truck may be: on-board air conditioner, on-board rice cooker, on-board audio player, on-board refrigerator and other low-power electrical equipment, in this embodiment, the preset power value is set according to the power value of the small and medium-sized on-board electrical equipment of the truck. In actual application, since the on-board air conditioner on the truck is used frequently, the target on-board electrical equipment can be set as the on-board air conditioner on the truck according to the actual needs, and the preset power value can be set according to the power consumption of the on-board air conditioner.

[0045] It can be imagined that if the target power consumption of the target on-board electrical equipment is less than the preset power value, it means that the 24V DC generator set only needs to power some small on-board electrical equipment on the truck, and does not need to power the on-board battery on the truck. At this time, the power supply control device of the truck is used to adjust the power supply of the 24V DC generator set, and the power supply power of the 24V DC generator set is adapted to the target power consumption of the target on-board electrical equipment. The 24V DC generator set can be used to power the target on-board electrical equipment and meet the needs of the actual situation. Under this power supply mode, because the 24V DC generator set is not required to be in a high-speed operation state all the time, the use of this method can not only reduce the fuel consumption generated by the 24V DC generator set, but also reduce the noise generated by the 24V DC generator.

[0046] It should be noted that in actual applications, if the target power consumption of the target on-board electrical equipment is less than the preset power value, the 24V DC generator set will output an output power consistent with the target power consumption required by the target on-board electrical equipment. In this case, since the 24V DC generator set will not operate under high-speed operation conditions, the 24V DC generator set will operate in energy-saving mode at this time.

[0047] It can be seen that in this embodiment, when the 24V DC generator set is used to power the target on-board electrical equipment on the truck, the power consumption of the target on-board electrical equipment is detected to obtain the target power consumption; if the target power consumption is less than the preset power value, it means that the 24V DC generator set does not need to power the on-board battery on the truck. At this time, the power supply power of the 24V DC generator set is adjusted so that the power supply power of the 24V DC generator set can be adapted to the target power consumption required by the target on-board electrical equipment. Compared with the prior art, since this method can adjust the power supply power of the 24V DC generator set according to the power consumption of the target on-board electrical equipment on the truck, it is not necessary for the 24V DC generator set to be in a high-speed operation state all the time. Therefore, this method can not only reduce the fuel consumption generated by the 24V DC generator set, but also reduce the noise generated by the 24V DC generator set.

[0048] Based on the above embodiment, this embodiment further illustrates and optimizes the technical solution. As a preferred implementation, the above step: the process of adjusting the power supply of the 24V DC generator set includes:

[0049] The output speed of the 24V DC generator set is adjusted according to the load current of the 24V DC generator set so that the output voltage of the 24V DC generator set is maintained at the rated voltage of the target on-board electrical equipment.

[0050] Specifically, in this embodiment, the power supply control device of the truck adjusts the output power of the 24V DC generator set according to the load current of the 24V DC generator set during the process of adjusting the power supply of the 24V DC generator set, and makes the power supply of the 24V DC generator set compatible with the target power consumption of the target on-board electrical equipment. That is, the power supply control device of the truck adjusts the output power of the 24V DC generator set according to the load current of the 24V DC generator set, so that the output voltage of the 24V DC generator set can be kept equal to the rated voltage of the target on-board electrical equipment.

[0051] It can be understood that because the load current of the 24V DC generator set can characterize the power demand state of the target vehicle electrical equipment, and the output speed of the 24V DC generator set can characterize the power output state of the 24V DC generator set, therefore, in practical applications, the output speed of the 24V DC generator set can be adjusted according to the load current of the 24V DC generator set, and the output voltage of the 24V DC generator set can be maintained at the rated voltage of the target vehicle electrical equipment.

[0052] As a preferred implementation, the power supply control method further includes:

[0053] If the output voltage of the 24V DC generator set is less than the rated voltage of the target vehicle electrical equipment, the output speed of the 24V DC generator set is increased to keep the output voltage of the 24V DC generator set at the rated voltage of the target vehicle electrical equipment.

[0054] If the output voltage of the 24V DC generator set is lower than the rated voltage of the target on-board electrical equipment, in order to ensure the normal and stable operation of the target on-board electrical equipment, the power supply control device of the truck can increase the output speed of the 24V DC generator set to increase the output power of the 24V DC generator set, so that the output voltage of the 24V DC generator set can meet the rated voltage of the target on-board electrical equipment.

[0055] As a preferred implementation, the power supply control method further includes:

[0056] The output speed of the 24V DC generator set is controlled to be less than a preset speed; wherein the preset speed is a speed set according to the target vehicle-mounted electrical equipment being able to maintain a safe operating state.

[0057] It is understandable that when the output speed of the 24V DC generator set is greater than the preset speed, not only will the 24V DC generator set be in an extreme operating state, but it may also cause the output voltage of the 24V DC generator set to be too high, exceeding the rated voltage of the electrical equipment, thereby causing a safety hazard of damaging the equipment. Therefore, in this embodiment, in order to ensure the safe operation of the 24V DC generator set, the power supply control device of the truck needs to control the output speed of the 24V DC generator set to be less than the preset speed.

[0058] As a preferred implementation, the power supply control method further includes:

[0059] If the load current of the 24V DC generator set is greater than the rated current of the target on-board electrical equipment and the duration exceeds the preset time threshold, it is determined that other on-board electrical equipment on the truck except the target on-board electrical equipment is in operation;

[0060] The output speed of the 24V DC generator set is reduced, and the on-board battery on the truck is used to power the on-board electrical equipment in operation on the truck, so that the output voltage of the 24V DC generator set is consistent with the output voltage of the on-board battery.

[0061] In actual applications, if the load current of the 24V DC generator set is greater than the rated current of the target on-board electrical equipment, and the duration of this state exceeds the preset time threshold, it means that other on-board electrical equipment on the truck except the target on-board electrical equipment is also in operation. Among them, other on-board electrical equipment on the truck can be either on-board electrical equipment that comes with the truck itself or on-board electrical equipment that is additionally installed on the truck by the user. For example: the on-board air conditioner, on-board rice cooker and on-board audio player installed on the truck may be in operation at the same time. In this case, in order to ensure the safe and stable operation of the on-board electrical equipment running on the truck, it is necessary to use the on-board battery on the truck to power the on-board electrical equipment in operation on the truck at the same time.

[0062] Specifically, when a 24V DC generator set and a vehicle battery are used to simultaneously power the onboard electrical equipment in operation on a truck, it is necessary to ensure that the output voltage of the 24V DC generator set is consistent with the output voltage of the vehicle battery.

[0063] It can be understood that when the load current of the 24V DC generator set is greater than the rated current of the target on-board electrical equipment, and the duration of this state exceeds the preset time threshold, it means that other on-board electrical equipment on the truck except the target on-board electrical equipment is also in operation. At this time, in order to ensure that the on-board electrical equipment in operation on the truck can operate safely and stably, it is necessary to start the on-board battery on the truck and control the output voltage of the 24V DC generator set to be consistent with the output voltage of the on-board battery, so as to utilize the parallel output voltage of the 24V DC generator set and the on-board battery to supply power to the on-board electrical equipment in operation on the truck.

[0064] As a preferred implementation, the power supply control method further includes:

[0065] If the output voltage of the vehicle battery is less than the preset voltage value, the output power of the 24V DC generator set is adjusted to charge the vehicle battery with the adjusted power 24V DC generator set and to supply power to the vehicle electrical equipment in operation on the truck.

[0066] It is understandable that, in the process of using the 24V DC generator set and the on-board battery to simultaneously supply power to the on-board electrical equipment in operation on the truck, if the output voltage of the on-board battery is less than the preset voltage value, it means that the on-board battery is already in the feeding state. In this case, it is necessary to use the power supply control device of the truck to adjust the output power of the 24V DC generator set, so that the 24V DC generator set can not only charge the on-board battery on the truck, but also supply power to the on-board electrical equipment in operation on the truck after the power is adjusted.

[0067] Obviously, through the technical solution provided in this embodiment, the safety and reliability of all on-board electrical equipment on the truck during operation can be further guaranteed.

[0068] See also Figure 2 , Figure 2 This is a structural diagram of a power supply control device for a 24V DC generator set used on a truck provided by an embodiment of the present invention. The power supply control device includes:

[0069] The three-phase rectifier module 21 is used to rectify the AC power output by the 24V DC generator set to obtain target DC power, and use the target DC power to power the target on-board electrical equipment on the truck;

[0070] A voltage detection module 22, connected to the three-phase rectifier module, for detecting a target output voltage of the three-phase rectifier module;

[0071] A current detection module 23, connected to the three-phase rectifier module, for detecting a target output current of the three-phase rectifier module;

[0072] The speed detection module 24 is connected to the 24V DC generator set and is used to detect the target speed of the 24V DC generator set;

[0073] The controller 25 is connected to the voltage detection module, the current detection module and the speed detection module, and is used to adjust the target speed according to the target output voltage and the target output current so that the output power of the 24V DC generator set is compatible with the power consumption of the target on-board electrical equipment.

[0074] In order to adapt to the power supply control method for a 24V DC generator set used on a truck provided in the above embodiment, in this embodiment, a power supply control device for a 24V DC generator set used on a truck is also disclosed to match the above method. Figure 2 In the power supply control device provided in this embodiment, a three-phase rectifier module 21 , a voltage detection module 22 , a current detection module 23 , a rotation speed detection module 24 and a controller 25 are provided.

[0075] Among them, the three-phase rectifier module 21 is used to rectify the AC power output by the 24V DC generator set to obtain the target DC power, and use the target DC power to power the target on-board electrical equipment on the truck. When the controller 25 detects the target output voltage and target output current of the three-phase rectifier module 21 through the voltage detection module 22 and the current detection module 23, it is equivalent to obtaining the required power required by the target on-board electrical equipment on the truck. In this case, the controller 25 can adjust the target speed of the 24V DC generator set so that the output power of the 24V DC generator set can be adapted to the power consumption of the target on-board electrical equipment.

[0076] It should be noted that since the three-phase rectifier module 21, the voltage detection module 22, the current detection module 23 and the speed detection module 24 are all common functional modules for technical personnel in this field, in this embodiment, the specific setting structure of the three-phase rectifier module 21, the voltage detection module 22, the current detection module 23 and the speed detection module 24 is not specifically limited, as long as the corresponding logical functions can be realized.

[0077] In addition, in practical applications, the controller 25 can be any integrated chip with logic computing functions, such as MCU (Micro Control Unit), CPLD (Complex Programmable Logic Device) or CPU (Central Processing Unit) and the like.

[0078] See also Figure 3 , Figure 3 A structural diagram of another power supply control device for a 24V DC generator set used on a truck provided by an embodiment of the present invention. As a preferred embodiment, the speed detection module 24 includes: a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4;

[0079] Among them, the first end of the first resistor R1 is connected to the second input end of the three-phase rectifier module, the second end of the first resistor R1 is connected to the first end of the second resistor R2, the second end of the second resistor R2 is grounded, the first end of the third resistor R3 is connected to the third input end of the three-phase rectifier module, the second end of the third resistor R3 is connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is grounded, and the second end of the first resistor R1 and the second end of the third resistor R3 are also connected to the controller respectively.

[0080] In this embodiment, a specific setting method of a speed detection module is provided, and the speed detection module can be used to detect the target speed of a 24V DC generator set. In addition, when the speed detection module is constructed using four resistors, the construction method of the speed detection module can be made simpler and easier to use.

[0081] As a preferred implementation, the current detection module 23 includes: a fifth resistor R5 and an operational amplifier U;

[0082] Among them, the first end of the fifth resistor R5 is respectively connected to the second output end of the three-phase rectifier module and the first input end of the operational amplifier U, the second end of the fifth resistor R5 is respectively connected to the target vehicle-mounted electrical equipment and the second input end of the operational amplifier U, and the output end of the operational amplifier U is connected to the controller.

[0083] Specifically, in this embodiment, an operational amplifier can be used to detect the target output current of the three-phase rectifier module by detecting the current on the fifth resistor, and since the operational amplifier can amplify the sampled current flowing through the fifth resistor, this setting method can relatively improve the detection accuracy of the output current of the three-phase rectifier module.

[0084] As a preferred implementation, the voltage detection module 33 includes: a sixth resistor R6 and a seventh resistor R7;

[0085] The first end of the sixth resistor R6 is connected to the first output end of the three-phase rectifier module, the second end of the sixth resistor R6 is connected to the controller and the first end of the seventh resistor R7 respectively, and the second end of the seventh resistor R7 is grounded.

[0086] In practical applications, the voltage divider circuit composed of the sixth resistor R6 and the seventh resistor R7 can be used to detect the target output current of the three-phase rectifier module. Compared with other types of voltage detection structures, this voltage detection method is not only simple in structure, but also low in cost. Therefore, by setting the voltage detection module in this way, the design cost required for the power supply control device can be further reduced.

[0087] In order to enable those skilled in the art to more clearly understand the implementation principle of the present invention, this embodiment describes in detail the technical contents disclosed in the above embodiments through an application scenario embodiment.

[0088] In actual applications, since the on-board air conditioner on a truck is used most frequently, in this embodiment, the on-board air conditioner is used as the target on-board electrical equipment for specific description. In actual operation, in order to improve the convenience of users when using the truck power supply control device, an air conditioning mode switch can also be set on the truck power supply control device, and the 24V DC generator set can be controlled by triggering the air conditioning mode switch to power the on-board air conditioner on the truck, so that the 24V DC generator set can work in the air conditioning control mode.

[0089] Specifically, when the user wants to use a 24V DC generator set to power the onboard air conditioner on a truck, he only needs to turn on the air conditioning mode switch on the truck power supply control device. At this time, the 24V DC generator set can adjust its output speed according to the actual power demand of the onboard air conditioner. Figure 3 and Figure 4 , Figure 4 A flowchart of another power supply control method for a 24V DC generator set used on a truck provided by an embodiment of the present invention. When the controller receives an air conditioning trigger command triggered by a user, the controller will receive a 5V high-level signal. At this time, the controller will maintain the output voltage of the 24V DC generator set at 28V according to the sampling signals detected by the voltage detection module and the current detection module, and power the on-board air conditioner on the truck.

[0090] When the truck is loaded, the output voltage of the 24V DC generator set will be lowered. When the controller receives the feedback signal from the voltage detection module, it will adjust the output speed of the 24V DC generator set to maintain the output voltage of the 24V DC generator set at 28V by increasing the output speed.

[0091] When the current detection module detects that the load current is less than 7A and lasts for 90 seconds, it means that the 24V DC generator set is already in the feeding state, and the 24V DC generator set is controlled to shut down at this time; when the current detection module detects that the load current reaches 30A, the controller will determine that the load current has reached the limit current of the truck in the air conditioning control mode. At this time, in order to ensure the safe and stable operation of the 24V DC generator set, the controller will limit the output speed of the 24V DC generator set to no more than 4200rpm. If the current detection module detects that the load current reaches 30A for a duration exceeding the preset time, it means that other on-board electrical equipment in addition to the on-board air conditioner is started on the truck. For example: the on-board rice cooker and on-board refrigerator installed by the user on the truck are additionally started. In this case, the controller will control the 24V DC generator set to reduce the voltage output, and the output current of the 24V DC generator set can still be maintained at 30A, and the extra loads of the on-board rice cooker and on-board refrigerator are powered by the on-board battery on the truck. That is, in actual operation, it is necessary to start the on-board battery on the truck and control the output voltage of the 24V DC generator set to be consistent with the output voltage of the on-board battery, and then use the parallel output voltage of the 24V DC generator set and the on-board battery to power the on-board air conditioner, on-board rice cooker and on-board refrigerator in operation. In this case, the on-board battery will be in discharge mode.

[0092] When the output voltage of the vehicle battery is less than or equal to 22.8V, in order to ensure that the vehicle battery can provide sufficient energy supply for other electrical equipment in the subsequent process, the operation mode of the power supply control device on the truck will be converted from the air-conditioning control mode to the normal control mode. That is, it is necessary to control the 24V DC generator set to supply power to the vehicle battery, vehicle air conditioner, vehicle rice cooker and vehicle refrigerator at the same time. In this case, the vehicle battery will be in charging mode. When the operation mode of the truck power supply device is converted to the normal control mode, the current detection module and the voltage detection module will detect the output current and output voltage of the three-phase rectifier module in real time. If the output current of the 24V DC generator set is less than 7A and lasts for 90s, it means that the 24V DC generator set is already in the feeding state. At this time, it is necessary to control the 24V DC generator set to shut down. If the current detection module detects that the output current of the three-phase rectifier module is greater than 68A, it means that the load current of the truck has reached the limit supply current of the 24V DC generator set. At this time, the controller will control the 24V DC generator set to reduce the voltage output and maintain the output current of the three-phase rectifier module at 64A. When the output speed of the 24V DC generator set drops to 3800rpm, the 24V DC generator set is controlled to shut down.

[0093] Since this method can adjust the power supply of the 24V DC generator set according to the power consumption of the target on-board electrical equipment on the truck, and the 24V DC generator set does not need to be in a high-speed operation state all the time, this method can not only reduce the fuel consumption generated by the 24V DC generator set, but also reduce the noise generated by the 24V DC generator set.

[0094] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0095] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0096] The above is a detailed introduction to the power supply control method and device for a 24V DC generator set used on a truck provided by the present invention. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea; at the same time, for general technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A power supply control device for a 24V DC generator set used on a truck, characterized in that: include: A three-phase rectifier module, used to rectify the alternating current output by the 24V DC generator set to obtain target direct current, and use the target direct current to power target on-board electrical equipment on the truck; the target on-board electrical equipment refers to on-board electrical equipment additionally installed on the truck; A voltage detection module, connected to the three-phase rectifier module, for detecting a target output voltage of the three-phase rectifier module; A current detection module, connected to the three-phase rectifier module, and used to detect a target output current of the three-phase rectifier module; A speed detection module, connected to the 24V DC generator set, for detecting a target speed of the 24V DC generator set; A controller, connected to the voltage detection module, the current detection module and the speed detection module, for regulating the target speed according to the target output voltage and the target output current, so that the output power of the 24V DC generator set is adapted to the power consumption of the target on-board electrical equipment; The process of adjusting the power supply of the 24V DC generator set includes: Adjusting the output speed of the 24V DC generator set according to the load current of the 24V DC generator set so that the output voltage of the 24V DC generator set is maintained at the rated voltage of the target on-board electrical equipment; Also includes: If the load current of the 24V DC generator set is greater than the rated current of the target on-board electrical equipment and the duration exceeds a preset time threshold, it is determined that other on-board electrical equipment on the truck except the target on-board electrical equipment is in operation; The output speed of the 24V DC generator set is reduced, and the on-board battery on the truck is used to power the on-board electrical equipment in operation on the truck, so that the output voltage of the 24V DC generator set is consistent with the output voltage of the on-board battery, and the parallel output voltage of the 24V DC generator set and the on-board battery is used to power the on-board electrical equipment in operation on the truck; If the output voltage of the 24V DC generator set is less than the rated voltage of the target vehicle-mounted electrical equipment, the output speed of the 24V DC generator set is increased so that the output voltage of the 24V DC generator set is maintained at the rated voltage of the target vehicle-mounted electrical equipment; Controlling the output speed of the 24V DC generator set to be less than a preset speed; wherein the preset speed is a speed set according to the target vehicle-mounted electrical equipment being able to maintain a safe operating state; In the process of using the 24V DC generator set and the vehicle-mounted battery to simultaneously power the vehicle-mounted electrical equipment in operation on the truck, if the output voltage of the vehicle-mounted battery is less than a preset voltage value, it is determined that the vehicle-mounted battery is in a feeding state, and the output power of the 24V DC generator set is adjusted so that the 24V DC generator set after the power adjustment can simultaneously power the vehicle-mounted battery on the truck and the vehicle-mounted electrical equipment in operation on the truck.

2. The power supply control device according to claim 1, characterized in that: The rotation speed detection module includes: a first resistor, a second resistor, a third resistor and a fourth resistor; Among them, the first end of the first resistor is connected to the second input end of the three-phase rectifier module, the second end of the first resistor is connected to the first end of the second resistor, the second end of the second resistor is grounded, the first end of the third resistor is connected to the third input end of the three-phase rectifier module, the second end of the third resistor is connected to the first end of the fourth resistor, the second end of the fourth resistor is grounded, and the second end of the first resistor and the second end of the third resistor are also connected to the controller respectively.

3. The power supply control device according to claim 1, characterized in that: The current detection module includes: a fifth resistor and an operational amplifier; Among them, the first end of the fifth resistor is respectively connected to the second output end of the three-phase rectifier module and the first input end of the operational amplifier, the second end of the fifth resistor is respectively connected to the target vehicle-mounted electrical equipment and the second input end of the operational amplifier, and the output end of the operational amplifier is connected to the controller.

4. The power supply control device according to claim 1, characterized in that: The voltage detection module includes: a sixth resistor and a seventh resistor; The first end of the sixth resistor is connected to the first output end of the three-phase rectifier module, the second end of the sixth resistor is connected to the controller and the first end of the seventh resistor respectively, and the second end of the seventh resistor is grounded.

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