Method and device for improving energy efficiency and power supply capacity of automobile generator

Abstract

The invention discloses a method and device for improving energy efficiency and power supply capacity of an automobile generator. The method comprises the following steps that a preset temperature value, a preset current value and a preset state value are set; collecting an actual temperature value and an actual current value of the automobile generator; respectively comparing the actual temperature value and the actual current value with a preset temperature value and a preset current value to obtain a first output state and a second output state, and combining the first output state and the second output state to obtain an actual output state of the automobile generator; and judging which preset state value the obtained actual output state accords with, and controlling the automobile generator to be in different working modes according to a judgment result. The technical problem that the energy efficiency and the power supply capacity are low due to the fact that the adjusting range of the output power of an existing automobile generator is limited can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile electrical systems, and in particular to a method and a device for improving the energy efficiency and power supply capacity of an automobile generator. Background Art

[0002] In terms of the use requirements of automobile generators, first, low speed is required, and second, high output power is required (because the voltage of the whole vehicle is nothing more than 12v or 24v, and high output power means high output current). Existing technology is limited by physical principles. The solution to this contradictory demand for generators is to balance it. The specific approach is that each generator manufacturer uses conventional means, but the focus is different. Some focus on strengthening the idle power generation capacity; some focus on strengthening the output current capacity; some manufacturers adopt a moderate balance, taking into account both speed and current. For example, for automobile AC generators, different manufacturers will develop generators with different speed ratios and different output powers based on different factors (engine displacement, ambient temperature, power / duration of electrical equipment at idle speed, etc.). Not only is there a problem of limited adjustable output power range, but it will also result in many types and models of generator assemblies, which is not conducive to management and stocking. Another example is the existing intelligent automobile generator, which is composed of a series of sensors and controllers such as current sensors, battery sensors and power controllers, and can adaptively adjust the output power of the generator to suit different vehicle conditions. However, the existing intelligent automobile generator only controls the output power by controlling the output voltage of the generator, and the adjustment range of the output power is still limited, and the power supply capacity is low.

[0003] In addition, there is currently a 48v generator design concept that aims to break the voltage bottleneck of the above-mentioned existing generators by increasing the power generation voltage. In theory, the output power of the generator can be doubled, but it needs to face the problem that the existing 24v products in the market are not compatible with 48v products. Therefore, this design concept is currently difficult to implement. Summary of the invention

[0004] The purpose of the present invention is to provide a method and device for improving the energy efficiency and power supply capacity of an automobile generator, in order to solve the technical problem that the output power adjustment range of existing automobile generators is limited, resulting in low energy efficiency and power supply capacity.

[0005] In order to achieve the above technical objectives, the present invention is implemented through the following technical solutions: In a first aspect, the present invention provides a method for improving the energy efficiency and power supply capacity of an automobile generator, comprising the following steps: Setting a preset temperature value, a preset current value and a preset state value; Collect the actual temperature and current values ​​of the automobile generator; Respectively comparing the actual temperature value and the actual current value with the preset temperature value and the preset current value to obtain a first output state and a second output state, and combining the first output state and the second output state to obtain the actual output state of the automobile generator; It is determined which of the preset state values ​​the actual output state obtains conforms to, and the automobile generator is controlled to be in different working modes according to the determination result.

[0006] Furthermore, the different operating modes include a first operating mode, a second operating mode, a third operating mode and a fourth operating mode. The first operating mode is to increase the output voltage at standard power, the second operating mode is to reduce the output voltage at standard power, the third operating mode is to be in standard power without adjusting the output voltage, and the fourth operating mode is to be in increased power without adjusting the output voltage.

[0007] Furthermore, the preset temperature value includes a first temperature value, a second temperature value, a third temperature value and a fourth temperature value.

[0008] Furthermore, the first output state is represented by 0, 1, 2, 3, and 4, wherein 0 indicates that the actual temperature is less than or equal to the first temperature value, 1 indicates that the actual temperature is greater than the first temperature value and less than or equal to the second temperature value, 2 indicates that the actual temperature is greater than the second temperature value and less than or equal to the third temperature value, 3 indicates that the actual temperature is greater than the third temperature value and less than or equal to the fourth temperature value, and 4 indicates that the actual temperature is greater than the fourth temperature value.

[0009] Furthermore, the second output state is represented by 0 and 1, wherein 0 indicates that the actual current value is less than or equal to the preset current value, and 1 indicates that the actual current value is greater than the preset current value.

[0010] Furthermore, the specific process of determining which preset state value the actual output state is consistent with and controlling the automobile generator to be in different working modes according to the determination result is as follows: The actual output state is represented by a two-digit number consisting of five digits representing the first output state and two digits representing the second output state, the digit representing the first output state is in the tens place, and the digit representing the second output state is in the ones place; The preset state value of the first working mode is defined as 00, the preset state value of the second working mode is defined as 40, the preset state value of the third working mode is defined as 01, 41, 10, 20, 30, and the preset state value of the fourth working mode is defined as 11, 21, 31; Comparing the actual output state with preset state values ​​of different working modes; The working mode of the automobile generator is controlled according to the comparison result.

[0011] Furthermore, the standard power refers to the power under the current formed by the taps at the head and tail ends of the armature winding wound on the stator of the automobile generator, which has two sets of taps.

[0012] Furthermore, the increased capacity power refers to the power under the current formed by the tap in the middle of the armature winding wound on the stator of the automobile generator, which is provided with two sets of taps.

[0013] In another aspect, the present invention provides a device for improving the energy efficiency and power supply capacity of an automobile generator, the device being used to implement the method for improving the energy efficiency and power supply capacity of an automobile generator provided in the first aspect of the present invention, comprising: A storage module, used for storing a preset temperature value, a preset current value and a preset state value; The acquisition module is used to collect the actual temperature value and actual current value of the automobile generator; A processing module, used for comparing the actual temperature value and the actual current value with the preset temperature value and the preset current value respectively to obtain a first output state and a second output state, and processing the first output state and the second output state to obtain an actual output state of the automobile generator; A judgment module, used to judge which preset state value the actual output state value is; The control module is used to control the automobile generator to work in different working modes according to the judgment result.

[0014] Furthermore, the acquisition module includes a temperature sensor and a current sensor arranged inside the automobile generator, and the control module includes a voltage control module and a current control module.

[0015] Compared with the prior art, the present invention provides a method and device for improving the energy efficiency and power supply capacity of an automobile generator, which can adjust the output power of the automobile generator through two parameters, voltage and current, so that the automobile generator can choose to work in different working modes according to actual conditions. The output power of the generator has a large adjustment range, thereby improving the energy efficiency and power supply capacity; in addition, since the output power of the present invention has a large adjustable range, it can be applied to a variety of situations, reducing the number of generator models, which is beneficial to the management and stocking of generators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a flow chart of the method for improving the energy efficiency and power supply capacity of an automobile generator according to the present invention; Figure 2 is a schematic diagram of the winding of the stator of the automobile generator of the present invention; Figure 3It is a schematic diagram of the working states of the standard power and the increased capacity power of the present invention; Figure 4 It is a control diagram for improving the energy efficiency and power supply capacity of the automobile generator according to the present invention; Figure 5 The present invention is a structural block diagram of a device for improving the energy efficiency and power supply capacity of an automobile generator. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] At present, there are two common types of automotive generators. One is the automotive AC generator, which consists of a housing, a rotor, a stator and a voltage regulator. Generators with different output powers need to be developed according to different usage requirements, resulting in a large number of generator models, which is not conducive to management. The other is the automotive intelligent generator, which adds a series of sensors and controllers to adaptively adjust the output power of the generator to adapt to different vehicle conditions. However, the existing intelligent generators only control the output power by controlling the output voltage of the generator, which limits the adjustment range of the output power, and thus makes the energy efficiency and power supply capacity of the generator low.

[0019] In view of the above technical problems, the present invention proposes a method for improving the energy efficiency and power supply capacity of an automobile generator, such as Figure 1 As shown, the method comprises the following steps: Step S1, setting a preset temperature value, a preset current value and a preset state value; Step S2, collecting the actual temperature value and actual current value of the automobile generator; Step S3, respectively comparing the actual temperature value and the actual current value with the preset temperature value and the preset current value to obtain a first output state and a second output state, and combining the first output state and the second output state to obtain an actual output state of the automobile generator; Step S4, determining which of the preset state values ​​the actual output state obtains conforms to, and controlling the automobile generator to be in different working modes according to the determination result.

[0020] The above technical solution of the present invention can adjust the output power of the automobile generator through the two parameters of voltage and current, so that the automobile generator can choose to work in different working modes according to actual conditions. The adjustment range of the output power of the generator is large, thereby improving energy efficiency and power supply capacity; in addition, since the output power of the present invention has a large adjustable range, it can be applied to a variety of situations, reducing the number of generator models, which is beneficial to the management and stocking of generators.

[0021] Specifically, the different working modes include a first working mode, a second working mode, a third working mode and a fourth working mode. The first working mode is to increase the output voltage under standard power, the second working mode is to reduce the output voltage under standard power, the third working mode is to be in standard power without adjusting the output voltage, and the fourth working mode is to be in increased power without adjusting the output voltage.

[0022] Specifically, the preset temperature values ​​include a first temperature value, a second temperature value, a third temperature value and a fourth temperature value, and the first temperature < the second temperature < the third temperature < the fourth temperature.

[0023] Specifically, the first output state is represented by 0, 1, 2, 3, and 4, wherein 0 indicates that the actual temperature is less than or equal to the first temperature value, 1 indicates that the actual temperature is greater than the first temperature value and less than or equal to the second temperature value, 2 indicates that the actual temperature is greater than the second temperature value and less than or equal to the third temperature value, 3 indicates that the actual temperature is greater than the third temperature value and less than or equal to the fourth temperature value, and 4 indicates that the actual temperature is greater than the fourth temperature value.

[0024] Specifically, the second output state is represented by 0 and 1, wherein 0 indicates that the actual current value is less than or equal to the preset current value, and 1 indicates that the actual current value is greater than the preset current value.

[0025] Specifically, the specific process of judging which preset state value the actual output state matches and controlling the automobile generator to be in different working modes according to the judgment result is as follows: The actual output state is represented by a two-digit number consisting of one of the five digits representing the first output state and one of the two digits representing the second output state, the digit representing the first output state is in the tens place, and the digit representing the second output state is in the ones place; Specifically, the preset state value of the first working mode is defined as 00, the preset state value of the second working mode is defined as 40, the preset state value of the third working mode is defined as 01, 41, 10, 20, 30, and the preset state value of the fourth working mode is defined as 11, 21, 31; Comparing the actual output state with preset state values ​​of different working modes; The working mode of the automobile generator is controlled according to the comparison result.

[0026] Specifically, the standard power refers to the power under the current formed by the taps at the head and tail ends of the armature winding wound on the stator of the automobile generator, where two sets of taps are set; the increased capacity power refers to the power under the current formed by the tap in the middle of the armature winding wound on the stator of the automobile generator, where two sets of taps are set.

[0027] In the above technical solution, the stator of the automobile generator is wound with an armature winding, the armature winding is energized, and the coil cuts the field winding to generate a magnetic field to generate alternating current. Furthermore, each phase of the armature winding is provided with two sets of taps, such as Figure 2 As shown, one set of taps is taken from the beginning and end of the winding, the beginning is Anfan and the end is Ende; the other set of taps is taken from the middle, which are U1, V1, and W1 respectively. The windings taken from the beginning and end are fully energized, and the generator works in the standard power state. The windings taken from the middle are half energized, and the generator works in the increased power state.

[0028] Furthermore, if Figure 3 As shown, the generator is in the standard power state when K1 is closed and K2 is open, and the generator is in the increased power state when K2 is closed and K1 is open. The component that controls K1 and K2 is the current control module 520 in the control module 500. A rectifier is also required to be connected to the circuit behind the K2 switch to convert AC power into DC power.

[0029] Specifically, increasing the output voltage and reducing the output voltage refer to controlling the output voltage of the generator to work in two voltage value modes. For example, the output voltage of an existing automobile generator is generally 24V, then in the present invention, the output voltage is reduced to 26V and the output voltage is increased to 28V. That is, the generator of the present invention works in two output voltage working modes of 26V and 28V, and combined with standard power and increased capacity power, the two factors work together to increase the adjustment range of the output power.

[0030] Specifically, in addition to improving the energy efficiency of the generator by controlling the output voltage and output current, the present invention also improves the energy efficiency by controlling the heat dissipation. Specifically, a choke plate is installed between the heat dissipation fan and the rotor of the generator. The structure of the choke plate is the same as the structure of the outer shell of the generator. It can be fixed to the outer shell of the generator through a sleeve, and a part of the original opening on the choke plate is made closed, that is, only a part of the opening is retained. In addition, a driving device is provided for the choke plate, and the driving device is electrically connected to the control module 500, so that the rotation of the choke plate can be controlled by the detected temperature to achieve the closing and opening of the outer shell of the generator. In the present invention, the initial position of the air baffle plate can block the wind blown toward the rotor by the cooling fan. When the air baffle plate is rotated by a certain angle, the wind from the cooling fan can be blown toward the rotor through the opening. The position of the air baffle plate is controlled by the temperature sensor. When the temperature detected by the temperature sensor is lower than the second temperature, the air baffle plate is in the initial position, which is conducive to the generator to quickly switch from a cold state to a hot state, thereby improving work efficiency. After the generator is working, the temperature of the generator will rise due to the heat dissipation blocked by the air baffle plate. When the temperature reaches the third temperature sensed by the temperature sensor, the air baffle plate is rotated by a certain angle, and the cooling fan dissipates heat to the generator through the air duct to prevent the generator from overheating. In this way, the energy efficiency of the generator can be improved.

[0031] The technical solution of the present invention is further illustrated by specific embodiments below.

[0032] like Figure 4 As shown, when the automobile generator is running, the actual temperature value and actual current value of the generator are collected through the temperature sensor and the current sensor (installed inside the generator). At this time, the actual temperature value of the generator is less than or equal to the first temperature value, and the first output state is represented by 0. The actual current value is less than or equal to the preset current value, and the second output state is represented by 0. Then the actual output state is 00, that is, the first working mode, and the first working mode is to increase the output voltage under standard power. At this time, the voltage control module 510 controls the output voltage to increase, that is, the output voltage is 28v, and the current control module 520 controls K1 to close and K2 to open, and the generator is in the working mode of standard power; At the same time, since the opening condition of the choke is that the actual temperature value of the generator is greater than the second temperature value, and the second temperature value is greater than the first temperature value, the choke is in the closed state at this time; thereafter, the actual operating temperature value of the generator gradually increases, and when the detected actual temperature value is higher than the third temperature value, the choke opens to dissipate heat for the generator, and the temperature continues to rise. When the detected actual temperature value is higher than the fourth temperature value, the first output state becomes represented by 4, then the actual output state is 40, and the generator is in the second working mode, that is, the output voltage is reduced under standard power, that is, the output voltage becomes 26V. If the generator stops rotating, the program ends, otherwise the above process is repeated.

[0033] It should be noted that when the actual current value detected is greater than the preset current value, the second output state is represented by 1, and the principle of forming its working mode is the same as above.

[0034] Second, as Figure 5 As shown, the present invention also provides a device for improving the energy efficiency and power supply capacity of an automobile generator, which is used to implement the method for improving the energy efficiency and power supply capacity of an automobile generator as described in the first aspect of the present invention, and includes a storage module 100, a collection module 200, a processing module 300, a judgment module 400 and a control module 500, wherein the storage module 100 is used to store a preset temperature value, a preset current value and a preset state value; the collection module 200 is used to collect the actual temperature value and the actual current value of the automobile generator, and the collection module 200 includes a temperature sensor and a current sensor arranged inside the automobile generator; the processing module 300 is used to compare the actual temperature value and the actual current value with the preset temperature value and the preset current value respectively to obtain a first output state and a second output state, and process the first output state and the second output state to obtain the actual output state of the automobile generator; the judgment module 400 is used to judge which preset state value the actual output state value is; the control module 500 is used to control the automobile generator to work in different working modes according to the judgment result, and the control module 500 includes a voltage control module 510 and a current control module 520.

[0035] In summary, the method and device for improving the energy efficiency and power supply capacity of an automobile generator provided by the present invention can control the output power through the two parameters of output voltage and current, thereby increasing the adjustment range of the output power, and can adjust the heat dissipation of the generator through the wind baffle, thereby improving the energy efficiency and power supply capacity of the generator; at the same time, the generator can be applicable to a variety of situations, reducing the number of generator models, which is beneficial to the management and stocking of generators.

[0036] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for improving the energy efficiency and power supply capacity of an automobile generator, characterized in that: The following steps are involved: Setting a preset temperature value, a preset current value and a preset state value; Collect the actual temperature and current value of the automobile generator; Respectively comparing the actual temperature value and the actual current value with the preset temperature value and the preset current value to obtain a first output state and a second output state, and combining the first output state and the second output state to obtain the actual output state of the automobile generator; It is determined which of the preset state values ​​the actual output state obtains conforms to, and the automobile generator is controlled to be in different working modes according to the determination result.

2. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 1, characterized in that: The different working modes include a first working mode, a second working mode, a third working mode and a fourth working mode. The first working mode is to increase the output voltage at standard power, the second working mode is to reduce the output voltage at standard power, the third working mode is to be at standard power without adjusting the output voltage, and the fourth working mode is to be at increased power without adjusting the output voltage.

3. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 2, characterized in that: The preset temperature values ​​include a first temperature value, a second temperature value, a third temperature value and a fourth temperature value.

4. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 3, characterized in that: The first output state is represented by 0, 1, 2, 3, and 4, wherein 0 indicates that the actual temperature is less than or equal to the first temperature value, 1 indicates that the actual temperature is greater than the first temperature value and less than or equal to the second temperature value, 2 indicates that the actual temperature is greater than the second temperature value and less than or equal to the third temperature value, 3 indicates that the actual temperature is greater than the third temperature value and less than or equal to the fourth temperature value, and 4 indicates that the actual temperature is greater than the fourth temperature value.

5. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 4, characterized in that: The second output state is represented by 0 and 1, wherein 0 indicates that the actual current value is less than or equal to the preset current value, and 1 indicates that the actual current value is greater than the preset current value.

6. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 5, characterized in that: The specific process of determining which preset state value the actual output state obtains and controlling the automobile generator to be in different working modes according to the determination result is as follows: The actual output state is represented by a two-digit number consisting of five digits representing the first output state and two digits representing the second output state, the digit representing the first output state is in the tens place, and the digit representing the second output state is in the ones place; The preset state value of the first working mode is defined as 00, the preset state value of the second working mode is defined as 40, the preset state value of the third working mode is defined as 01, 41, 10, 20, 30, and the preset state value of the fourth working mode is defined as 11, 21, 31; Comparing the actual output state with preset state values ​​of different working modes; The working mode of the automobile generator is controlled according to the comparison result.

7. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 2, characterized in that: The standard power refers to the power under the current formed by the taps at the head and tail ends of the armature winding wound on the stator of the automobile generator, which has two sets of taps.

8. The method for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 7, characterized in that: The increased capacity power refers to the power under the current formed by the tap in the middle of the armature winding wound on the stator of the automobile generator, which has two sets of taps.

9. A device for improving the energy efficiency and power supply capacity of an automobile generator, used to implement the method for improving the energy efficiency and power supply capacity of an automobile generator as claimed in any one of claims 1 to 9, characterized in that: include: A storage module, used for storing a preset temperature value, a preset current value and a preset state value; The acquisition module is used to collect the actual temperature value and actual current value of the automobile generator; A processing module, used for comparing the actual temperature value and the actual current value with the preset temperature value and the preset current value respectively to obtain a first output state and a second output state, and processing the first output state and the second output state to obtain an actual output state of the automobile generator; A judgment module, used to judge which preset state value the actual output state value is; The control module is used to control the automobile generator to work in different working modes according to the judgment result.

10. The device for improving the energy efficiency and power supply capacity of a vehicle generator according to claim 9, characterized in that: The acquisition module includes a temperature sensor and a current sensor arranged inside the automobile generator, and the control module includes a voltage control module and a current control module.

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