Power generation control method, control device, controller and starting and power generation all-in-one machine

Abstract

The invention relates to a power generation control method and device, a controller and a starting and power generation all-in-one machine. The method comprises the following steps: when the starting and power generation all-in-one machine is in a power generation mode and has a Hall fault, acquiring an output voltage of a bus capacitor according to a preset sampling frequency, and stopping phase control voltage regulation control; if the output voltage of the bus capacitor is greater than the upper limit value of the preset voltage range, controlling an upper bridge arm switch tube of the inverter circuit to be kept in a cut-off state and a lower bridge arm switch tube to be in a conducting state; and if the output voltage of the bus capacitor is smaller than the lower limit value of the preset voltage range, the upper bridge arm switch tube and the lower bridge arm switch tube are controlled to be in a cut-off state, and after a preset time, the upper bridge arm switch tube is controlled to be kept in the cut-off state and the lower bridge arm switch tube is controlled to be in a conducted state, so that the battery and / or the bus capacitor supplies power to the whole vehicle. By adopting the method, the output voltage fluctuation can be reduced and the controllable power can be realized when the Hall fault occurs in the starting and generating all-in-one machine.

Description

Technical Field

[0001] The present application relates to the field of motor control technology, and in particular to a power generation control method, a control device, a controller, and a starter-generator integrated machine. Background Art

[0002] At present, motorcycles with idle start-stop function generally use an integrated starter generator (ISG) to achieve starting and power generation functions, while supporting the injection and ignition control of the electronic fuel injection (EFI) system. However, since the Hall sensor is located in the engine case, it is affected by high temperature and vibration for a long time and is prone to failure. Once the Hall sensor fails, the entire vehicle system will not operate normally. In addition, the power generation control of the ISG relies on the Hall signal as the time base to adjust the three-phase conduction angle, thereby controlling the voltage output by the ISG. If the Hall sensor fails, the control system cannot obtain accurate position information, resulting in the inability to perform effective vector power generation control, which in turn affects the normal power generation function of the ISG.

[0003] To address this problem, a short-circuit voltage regulation mode is proposed in the prior art to maintain a certain power generation capacity when the Hall sensor fails. However, under the control of this short-circuit voltage regulation mode, the voltage output of the ISG fluctuates greatly and the power is uncontrollable, which not only limits its application scope, but also may have adverse effects on batteries and other electrical components. Summary of the invention

[0004] Based on this, it is necessary to provide a power generation control method, control device, controller, and starter generator that can reduce output voltage fluctuations and achieve power controllable when a Hall fault occurs in the starter generator to address the above technical problems.

[0005] In a first aspect, the present application provides a power generation control method, which is applied to start a power generation integrated machine, and the method comprises:

[0006] When the starter-generator is in the power generation mode and a Hall fault occurs, the output voltage of the bus capacitor is collected at a preset sampling frequency, and the phase-controlled voltage regulation control is stopped;

[0007] If the output voltage of the bus capacitor is greater than the upper limit of the preset voltage range, the upper bridge arm switch tube of the inverter circuit is controlled to remain in the off state and the lower bridge arm switch tube is in the on state;

[0008] If the output voltage of the bus capacitor is less than the lower limit of the preset voltage range, the upper bridge arm switch tube and the lower bridge arm switch tube are controlled to be in the cut-off state;

[0009] After the preset time when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the cut-off state, the upper bridge arm switch tube is controlled to remain in the cut-off state and the lower bridge arm switch tube is in the on state, so that the battery and / or bus capacitor can supply power to the whole vehicle. The preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with the voltage difference between any value within the preset voltage range and the output voltage.

[0010] In one embodiment, the method further comprises:

[0011] When the phase-controlled voltage regulation control is stopped, the output signal of the Hall sensor of each phase is obtained;

[0012] If the output signals of the Hall sensors of each phase are not the same at the same sampling time in the same commutation cycle, the phase-controlled voltage regulation control is re-entered.

[0013] In one embodiment, if the output signals of the Hall sensors of each phase are not the same at the same sampling time in the same commutation cycle, the phase-controlled voltage regulation control is re-entered, including:

[0014] If the count value is greater than or equal to the preset number of times in the same commutation cycle, the phase-controlled voltage regulation control is re-entered; the count value is the cumulative number of times in the same commutation cycle that the output signals of the Hall sensors of each phase are not the same at the same sampling time.

[0015] In one embodiment, the method further comprises:

[0016] If the output signals of the Hall sensors of each phase are the same at the same sampling time in the same switching cycle, the count value is reset and maintained until the next switching cycle.

[0017] In one embodiment, the method further comprises:

[0018] If the output signals of the Hall sensors of each phase are the same at the same sampling time in the same switching cycle, it is determined that a Hall fault exists.

[0019] In one embodiment, if the output signals of the Hall sensors of each phase at the same sampling time are the same in the same switching cycle, it is determined that a Hall fault exists, including:

[0020] If in the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are all high level, then it is determined that the Hall fault is an open circuit of the Hall sensor.

[0021] In one embodiment, if the output signals of the Hall sensors of each phase are equal at the same sampling time in the same commutation cycle, it is determined that a Hall fault exists, including:

[0022] If in the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are all low level, it is determined that the Hall fault is a short circuit of the Hall sensor.

[0023] In a second aspect, the present application also provides a power generation control device, the device comprising:

[0024] The sampling control module is used to collect the output voltage of the bus capacitor at a preset sampling frequency and stop the phase-controlled voltage regulation control when the starter-generator is in the power generation mode and a Hall fault exists;

[0025] A first switch tube control module, used to control the upper bridge arm switch tube of the inverter circuit to remain in a cut-off state and the lower bridge arm switch tube to be in a conducting state when the output voltage of the bus capacitor is greater than the upper limit value of a preset voltage range;

[0026] A second switch tube control module, used to control the upper bridge arm switch tube and the lower bridge arm switch tube to be in a cut-off state when the output voltage of the bus capacitor is less than the lower limit of the preset voltage range;

[0027] The third switch tube control module is used to control the upper bridge arm switch tube to remain in the cut-off state and the lower bridge arm switch tube to be in the on state after the preset time when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the cut-off state, so that the battery and / or bus capacitor can supply power to the whole vehicle, the preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with the voltage difference between any value within the preset voltage range and the output voltage.

[0028] In a third aspect, the present application further provides a controller including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method in the above embodiment when executing the computer program.

[0029] In a fourth aspect, the present application further provides an integrated starter and generator, which includes the controller in the above-mentioned embodiment.

[0030] The above power generation control method, control device, controller, and starter-generator have at least the following beneficial effects:

[0031] By using a preset sampling frequency to monitor the bus capacitor output voltage in real time and controlling the state of the switch tube in the inverter circuit based on this, it is possible to effectively reduce output voltage fluctuations and ensure power controllability even if the precise rotor position information is lost when a Hall fault occurs in the starter generator. Specifically, when a Hall fault occurs in the power generation mode, the controller will immediately stop the phase-controlled voltage regulation control and collect the output voltage of the bus capacitor at a preset sampling frequency to quickly respond to voltage changes; when the voltage is higher than the preset upper limit, the voltage is quickly reduced by controlling the switch tube in the inverter circuit to form a short-circuit state; and when the voltage is lower than the preset lower limit, all switch tubes are turned off, and the reverse freewheeling diode is used for charging to increase the voltage. The preset time is negatively correlated with the sampling frequency, which means that a higher sampling frequency allows a shorter pulse width, that is, a shorter charging time, but the overall charging effect is maintained by increasing the pulse frequency, thereby more finely controlling the output voltage; at the same time, the preset time is positively correlated with the voltage difference, ensuring that no matter how the load demand changes, it can respond quickly by adjusting the pulse width, so that the bus capacitor output voltage is always maintained within the preset range, ensuring stable power supply for the entire vehicle while also improving the reliability and efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0033] FIG1 is an application environment diagram of a power generation control method in one embodiment;

[0034] FIG2 is a schematic diagram of a partial circuit structure of a starter-generator integrated machine in one embodiment;

[0035] FIG3 is a schematic flow chart of a power generation control method in one embodiment;

[0036] FIG4 is a schematic diagram of the timing changes of signals such as each phase signal and output voltage in one embodiment;

[0037] FIG5 is a schematic diagram of signal flow of an inverter circuit in one embodiment;

[0038] FIG6 is a schematic diagram of signal flow of an inverter circuit in another embodiment;

[0039] FIG7 is a schematic flow chart of a power generation control method in another embodiment;

[0040] FIG8 is a schematic diagram of the installation between the Hall sensor and the motor rotor in one embodiment;

[0041] FIG9 is a schematic diagram of six-step changes of Hall logic values ​​in one embodiment;

[0042] FIG10 is a schematic diagram showing the timing changes of output signals of the Hall sensors of each phase in one embodiment;

[0043] FIG11 is a schematic diagram of the timing changes of phase signals and output voltage and other signals in another embodiment;

[0044] FIG12 is a schematic diagram of the structure of a power generation control device in one embodiment;

[0045] FIG. 13 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0047] The power generation control method provided in the embodiment of the present application can be applied to the motorcycle shown in FIG1, and at least includes a starter generator 2 and a controller 4 (other components of the motorcycle are not shown). As shown in FIG2, FIG2 is a partial circuit diagram of the starter generator 2 in one embodiment. The starter generator 2 at least includes an inverter circuit, a Hall sensor provided in each phase winding, a battery and a bus capacitor. The battery and the bus capacitor are connected in parallel, and the output terminals V out Connected to other electrical equipment of the motorcycle to be powered by a battery and / or bus capacitor; the starter generator 2 also includes a switch tube drive circuit, and the controller 4 is connected to the switch tube drive circuit, and the switch tube in the inverter circuit can be controlled by the switch tube drive circuit. The controller 4 is used to collect the output voltage of the bus capacitor at a preset sampling frequency and stop the phase-controlled voltage regulation control when the starter generator 2 is in power generation mode and there is a Hall fault. If the output voltage of the bus capacitor is greater than the upper limit of the preset voltage range, the upper arm switch tube of the inverter circuit is controlled by the switch tube drive circuit to remain in the off state and the lower arm switch tube is in the on state. If the output voltage of the bus capacitor is less than the lower limit of the preset voltage range, the upper arm switch tube and the lower arm switch tube are controlled to be in the off state. The controller 4 is also used to control the upper bridge arm switch tube to remain in the cut-off state and the lower bridge arm switch tube to be in the on state after a preset time when both the upper bridge arm switch tube and the lower bridge arm switch tube enter the cut-off state, so that the battery and / or bus capacitor can supply power to the entire vehicle; wherein the preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with the voltage difference between any value within the preset voltage range and the output voltage.

[0048] In an exemplary embodiment, as shown in FIG3 , the present application provides a power generation control method, which is applied to a starting power generation integrated machine, and the method includes:

[0049] S302, when the starter-generator is in the power generation mode and a Hall fault exists, the output voltage of the bus capacitor is collected at a preset sampling frequency, and the phase-controlled voltage regulation control is stopped.

[0050] Among them, Hall fault refers to the failure of the Hall sensor. The Hall sensor is used to detect the position of the motor rotor, thereby helping the control system to accurately adjust the current phase. When the Hall sensor fails, the controller cannot obtain accurate rotor position information, which causes the vector control of the ISG to fail, affecting the power generation efficiency and stability. The preset sampling frequency refers to the number of times data is collected within a specific time. In this embodiment, it refers to the sampling frequency of the output voltage of the bus capacitor. By setting a suitable sampling frequency, the voltage change on the bus capacitor can be monitored in real time to provide a basis for subsequent control strategies. Phase-controlled voltage regulation control is a method of controlling the output voltage by adjusting the conduction angle of the switching device. Specifically, it refers to controlling the conduction of the switch tube through the switch tube drive circuit to achieve voltage regulation.

[0051] For example, taking a three-phase starter generator as an example, as shown in FIG2 , the engine of a motorcycle (not shown in the figure) is connected to the input end of the U / V / W three-phase winding of the starter generator. When the engine is rotating, the inductance on the input end of the U / V / W three-phase winding of the starter generator generates an induced electromotive force, so that the starter generator generates current, thereby generating electricity. When a Hall fault occurs, the controller cannot obtain accurate rotor position information. In the absence of accurate rotor position information, the phase-controlled voltage regulation control may no longer be effective, and may even cause the output voltage to be unstable. Therefore, in order to avoid aggravating voltage fluctuations due to incorrect phase control and protect batteries and other electrical equipment from damage, it is necessary to stop the phase-controlled voltage regulation control at this time. At the same time, the output voltage of the bus capacitor is collected at a preset sampling frequency, and the voltage changes on the bus capacitor are timely understood to provide data support for subsequent power generation regulation. Specifically, as shown in FIG4 , CH1, CH3 and CH5 are the output signals of three Hall sensors provided in the starter generator, respectively; CH2, CH4 and CH6 are the voltage signals of the input end of the U / V / W three-phase winding, respectively; CH7 is the output voltage signal of the bus capacitor, and CH8 is the output current signal of the bus capacitor. As can be seen from FIG4 , the CH5 signal does not jump from the beginning to the end, indicating that there is a Hall fault. At this time, the preset sampling frequency f ck =1000 Hz (ie sampling period T ck = 1 millisecond), collect the output voltage of the bus capacitor (i.e. collect the CH8 signal).

[0052] For the above-mentioned preset sampling frequency, it should be noted that when the preset sampling frequency is higher, the number of detections of the output voltage of the bus capacitor in a unit time is more, and then the number of adjustments to the conduction of the switch tube in the inverter circuit based on the output voltage of the bus capacitor detected is more, so it can respond to the change of the output voltage of the bus capacitor more quickly, and can control the state of the switch tube more finely, so as to better maintain the output voltage of the bus capacitor at a stable level. Based on this, a higher sampling frequency can be set as much as possible according to the sampling performance of the device and the data processing efficiency, so that the controller can detect whether the output voltage is within the preset voltage range more quickly, and make corresponding adjustments accordingly. When the output voltage deviates from the preset voltage range, high-frequency sampling can reduce the phenomenon of overshoot or undershoot, that is, reduce the degree and duration of the voltage exceeding the set range. This rapid response reduces the amplitude of the fluctuation of the output voltage of the bus capacitor near the preset voltage range, thereby reducing the pulsation of the output voltage of the bus capacitor.

[0053] S304, if the output voltage of the bus capacitor is greater than the upper limit of the preset voltage range, the upper bridge arm switch tube of the inverter circuit is controlled to remain in the off state and the lower bridge arm switch tube is in the on state.

[0054] Among them, the preset voltage range is a voltage value range that can ensure that the vehicle can continue to drive normally. For example, the upper and lower limits of the preset voltage range can be set based on the output voltage range under the normal driving state of the vehicle. Then, when the output voltage of the bus capacitor is within the preset voltage range, the vehicle can continue to drive normally.

[0055] Exemplarily, the upper limit of the preset voltage range can be set according to the upper limit of the output voltage range of the vehicle, and is not limited here. When the output voltage of the bus capacitor is greater than the upper limit of the preset voltage range, it means that if the output voltage of the bus capacitor is too large at this time, as shown in FIG5 , the controller can output a phase short circuit instruction to the upper bridge arm switch tube (MOS tube Q1, MOS tube Q3 and MOS tube Q5) and the lower bridge arm switch tube (MOS tube Q2, MOS tube Q4 and MOS tube Q6) through the switch tube drive circuit (not shown in the figure), so that the upper bridge arm switch tube remains in the cut-off state, the lower bridge arm switch tube is in the on state, all stator windings are short-circuited, and the battery and bus capacitor are stopped from being charged, so that the output voltage of the bus capacitor is reduced.

[0056] S306, if the output voltage of the bus capacitor is less than the lower limit of the preset voltage range, the upper bridge arm switch tube and the lower bridge arm switch tube are controlled to be in a cut-off state.

[0057] The lower limit value of the preset voltage range may also be set according to the lower limit value of the output voltage range of the vehicle, which is not limited here.

[0058] Exemplarily, the situation where the output voltage of the bus capacitor is less than the lower limit of the preset voltage range may occur after the processing of step S304, or may exist when the output voltage of the bus capacitor is collected at a preset sampling frequency when the starter generator is in the power generation mode and a Hall fault exists. When the output voltage of the bus capacitor is less than the lower limit of the preset voltage range, it means that the output voltage of the bus capacitor is too small at this time. As shown in FIG6 , the controller can output a shutdown instruction to the inverter circuit through a switch tube drive circuit (not shown in the figure), control all the switch tubes (MOS tube Q1, MOS tube Q3, MOS tube Q5, MOS tube Q2, MOS tube Q4 and MOS tube Q6) in the inverter circuit to be in the cut-off state, and the reverse freewheeling diode (D1, D2, D3, D4, D5 and D6) of each switch tube forms a three-phase full-bridge rectifier circuit, connects the U, V, and W three-phase windings of the starter generator to the input and output ends of the battery and the bus capacitor, charges the battery, and the bus capacitor smoothes the output voltage, and the output voltage of the bus capacitor gradually increases.

[0059] S308, after the preset time when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the cut-off state, control the upper bridge arm switch tube to maintain the cut-off state and the lower bridge arm switch tube to be in the on state, so that the battery and / or bus capacitor can supply power to the whole vehicle, the preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with the voltage difference between any value within the preset voltage range and the output voltage.

[0060] Exemplarily, it can be seen from the above that when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the cut-off state, the U, V, and W three-phase windings of the starter generator are connected to the input and output terminals of the battery and the bus capacitor, and the battery begins to be charged, that is, the preset time may refer to the time for charging the battery. After charging for the preset time, the output voltage of the bus capacitor gradually increases and exceeds the lower limit of the preset voltage range. At this time, the upper bridge arm switch tube can be controlled to maintain the cut-off state and the lower bridge arm switch tube can be in the on state, so that all stator windings are short-circuited, and the battery and bus capacitor are stopped from charging. At this time, the battery and / or bus capacitor supply power to the whole vehicle. When supplying power to the whole vehicle, the output voltage of the battery and the bus capacitor gradually decreases, and the output voltage of the bus capacitor is less than the lower limit of the preset voltage range again, and then steps S306 and S308 are cyclically executed to ensure stable power supply to the whole vehicle. It can be seen that in the above-mentioned cycle process, a periodic signal similar to PWM modulation is formed, and in the process of the periodic signal, the preset time may refer to the pulse width in the periodic signal, which represents when both the upper bridge arm switch tube and the lower bridge arm switch tube enter the cut-off state.

[0061] It should be noted that the setting of the preset time can be set according to the preset sampling frequency. As can be seen from the above, the higher the sampling frequency, the smaller the output voltage fluctuation, and the higher the sampling frequency, the higher the frequency of adjusting the above pulse width in unit time, so the charging time can be shortened each time the output voltage of the bus capacitor is less than the lower limit of the preset voltage range, that is, the length of each pulse width in the periodic signal is shortened, and the duty cycle of the battery and the bus capacitor in the charging state is ensured to remain unchanged in the entire periodic signal by increasing the number of occurrences of the pulse width, so that the actual output voltage of the bus capacitor meets the power supply demand of the whole vehicle. In addition, the setting of the preset time can also be set according to the voltage difference between any value and the output voltage within the preset voltage range. As mentioned above, the preset voltage range is a voltage value range that can ensure that the vehicle can continue to drive normally, and when the output voltage of the bus capacitor is within the preset voltage range, the vehicle can continue to drive normally. During the vehicle driving process, the output voltage of the bus capacitor may need to reach any value within the preset voltage range to meet different power requirements. Therefore, when setting the above preset time, it is also necessary to consider the voltage difference between any value and the output voltage within the preset voltage range. Specifically, as shown in FIG4 , at the sampling frequency f ck =1000 Hz (ie sampling period T ck = 1 millisecond), combined with the power demand, the preset time T on It is set to 200 microseconds. As can be seen from Figure 4, the output current of the bus capacitor is effectively controlled, the peak value is relatively consistent, and the output voltage of the bus capacitor fluctuates less.

[0062] The above power generation control method uses a preset sampling frequency to monitor the output voltage of the bus capacitor in real time, and controls the state of the switch tube in the inverter circuit based on this, so that when a Hall fault occurs in the starter generator, even if the precise rotor position information is lost, the output voltage fluctuation can be effectively reduced and the power can be controlled. Specifically, when a Hall fault occurs in the power generation mode, the controller will immediately stop the phase-controlled voltage regulation control and collect the output voltage of the bus capacitor at a preset sampling frequency to quickly respond to voltage changes; when the voltage is higher than the preset upper limit, the voltage is quickly reduced by controlling the switch tube in the inverter circuit to form a short-circuit state; and when the voltage is lower than the preset lower limit, all the switch tubes are turned off, and the reverse freewheeling diode is used for charging to increase the voltage. The preset time is negatively correlated with the sampling frequency, which means that a higher sampling frequency allows a shorter pulse width, that is, a shorter charging time, but the overall charging effect is maintained by increasing the pulse frequency, thereby more finely controlling the output voltage; at the same time, the preset time is positively correlated with the voltage difference, ensuring that no matter how the load demand changes, it can respond quickly by adjusting the pulse width, so that the bus capacitor output voltage is always maintained within the preset range, ensuring stable power supply for the entire vehicle while also improving the reliability and efficiency of the system.

[0063] In an exemplary embodiment, as shown in FIG7 , the method further includes:

[0064] S702, obtaining output signals of Hall sensors of each phase when the phase-controlled voltage regulation control is stopped.

[0065] S704, if the output signals of the Hall sensors of each phase are not the same at the same sampling time in the same commutation cycle, then re-enter the phase-controlled voltage regulation control.

[0066] Among them, taking the three-phase starter generator as an example, as shown in FIG8, the Hall sensor is installed in a 120° manner, that is, three Hall sensors with an electrical angle difference of 120° are installed in the starter generator to reflect the motor rotor position. When the starter generator rotates in a certain direction, the output signals of the three Hall sensors will change according to the six-step rule shown in FIG9 and FIG10, wherein CH1 represents the output signal of Hall sensor 1, CH2 represents the output signal of Hall sensor 2, and CH3 represents the output signal of Hall sensor 3, "1" represents the output of the Hall sensor at a high level, and "0" represents the output of the Hall sensor at a low level. The output signals of the Hall sensors of each phase are shown in Table 1 below. It can be seen from Table 1 below that for the three-phase starter generator as described above, in one commutation cycle, its Hall logic values ​​are "101", "100", "100", "010", "011" and "001", and the "111" and "000" states will not appear. If expressed in decimal, the "7" and "0" states will not appear.

[0067] Table 1

[0068]

[0069] For example, when the phase-controlled voltage regulation control is stopped, the output signal of each phase Hall sensor is obtained to determine whether the starter generator has a Hall fault. When the output signals of each phase Hall sensor at the same sampling time are not the same in the same phase switching cycle, that is, the "111" and "000" states do not appear, it means that the Hall sensor is not abnormal or has returned to normal at this time, or it means that the previous Hall fault may be caused by signal distortion due to interference in the signal transmission process, resulting in a misjudgment of the Hall fault. Therefore, in order to improve the power generation efficiency, the phase-controlled voltage regulation control is re-entered when there is no Hall fault.

[0070] In this embodiment, by detecting the output signal of the Hall sensor of each phase when the phase-controlled voltage regulation control is stopped, and checking whether the output signals of all sensors are consistent within one phase switching cycle (i.e., "111" or "000" state), it is possible to effectively identify whether the Hall sensor has a fault or has restored to a normal working state; when it is confirmed that the above abnormal state does not occur, the system can safely re-enter the phase-controlled voltage regulation control mode, which not only helps to timely discover and eliminate Hall sensor faults and avoid unnecessary interruption of phase-controlled voltage regulation control due to misjudgment, but also ensures that efficient phase-controlled voltage regulation control is restored as soon as possible in the absence of faults, thereby improving the overall power generation efficiency and system reliability.

[0071] In an exemplary embodiment, if the output signals of the Hall sensors of each phase are not the same at the same sampling time in the same commutation cycle, the phase-controlled voltage regulation control is re-entered, including:

[0072] If the count value is greater than or equal to the preset number of times in the same commutation cycle, the phase-controlled voltage regulation control is re-entered; the count value is the cumulative number of times in the same commutation cycle that the output signals of the Hall sensors of each phase are not the same at the same sampling time.

[0073] As mentioned above, in the same commutation cycle, there are six normal states, namely, "101", "100", "100", "010", "011" and "001", so the preset number of times can be set to 6. In the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are not the same, that is, the "111" and "000" states do not appear.

[0074] Exemplarily, in the same commutation cycle, whenever the "111" and "000" states are not detected, the count value is increased by 1, and when the count value is greater than or equal to 6, the phase-controlled voltage regulation control can be re-entered. Specifically, as shown in FIG11 , when a Hall fault is detected at time A, and after a commutation cycle, the "111" and "000" states are not detected, the count value is greater than or equal to 6, and the phase-controlled voltage regulation control is re-entered at time B.

[0075] In this embodiment, by setting a count value and checking the output signal of the Hall sensor at each sampling moment, it is ensured that the count is accumulated when the output signals of all sensors are not consistent (i.e., "111" or "000" state). When the count value reaches a preset number of times (for example, 6 cycles of six normal states), the system can confirm that the Hall sensor has resumed normal operation or the previous fault is temporary, thereby safely re-entering the phase-controlled voltage regulation control mode. This mechanism effectively avoids unnecessary interruption of the phase-controlled voltage regulation control due to misjudgment, and at the same time ensures that efficient operation is resumed as soon as possible in the absence of faults, thereby improving the overall power generation efficiency and system reliability.

[0076] In an exemplary embodiment, the method further comprises:

[0077] If the output signals of the Hall sensors of each phase are the same at the same sampling time in the same switching cycle, the count value is reset and maintained until the next switching cycle.

[0078] Exemplarily, as described above, in the same commutation cycle, there are six normal states, namely "101", "100", "100", "010", "011" and "001". For example, at the first two sampling moments in the same commutation cycle, no "111" and "000" states are detected, and the count value is 2 at this time. When the "111" or "000" state is detected at the third sampling moment, the count value is cleared (i.e., the count value is 0) and maintained until entering the next commutation cycle and starting to count again.

[0079] In this embodiment, by clearing the count value and maintaining it until the next phase switching cycle starts when it is detected that the output signals of the Hall sensors of each phase are the same (i.e., the "111" or "000" state appears) at the same sampling moment, it can be ensured that the system will not re-enter the phase-controlled voltage regulation control mode until it is actually detected that the Hall sensor has resumed normal operation, effectively avoiding unnecessary restart of the phase-controlled voltage regulation control due to short-term signal interference or misjudgment, thereby improving the stability of the system and the power generation efficiency.

[0080] In an exemplary embodiment, the method further comprises:

[0081] If the output signals of the Hall sensors of each phase are the same at the same sampling time in the same switching cycle, it is determined that a Hall fault exists.

[0082] Exemplarily, as described above, within the same commutation cycle, the output signals of the Hall sensors of each phase will not be the same (i.e., "111" or "000" state) at the same sampling time. Therefore, as long as the output signals of the Hall sensors of each phase are the same at the same sampling time within the same commutation cycle, it can be determined that a Hall fault exists.

[0083] In this embodiment, by monitoring the output signals of the Hall sensors of each phase at the same sampling time, once the output signals of all sensors are consistent (i.e., "111" or "000" state) within the same commutation cycle, it can be immediately determined that a Hall fault exists, thereby enabling the abnormal state of the Hall sensor to be identified quickly and accurately, helping to take timely measures to avoid further system failures, thereby improving the stability and reliability of the system.

[0084] In an exemplary embodiment, if the output signals of the Hall sensors of each phase at the same sampling time are the same in the same switching cycle, it is determined that a Hall fault exists, including:

[0085] If in the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are all high level, then it is determined that the Hall fault is an open circuit of the Hall sensor.

[0086] For example, when there is no Hall fault, the output signals of the Hall sensors of each phase are as shown in Table 1 above. When there is an open circuit fault in one or more phases of the Hall sensor, the controller can only detect that the Hall sensor of the phase continuously outputs a high level (i.e., the corresponding output value is "1"). At this time, within a phase switching cycle, the Hall logic value will inevitably be "111" at a certain sampling time. For example, taking the case where the Hall sensor of the U phase has an open circuit fault, the output signals of the Hall sensors of each phase in Table 1 become as shown in Table 2 below.

[0087] Table 2

[0088]

[0089] It can be seen from Table 2 above that the output signals of the Hall sensors of each phase are all high at the same sampling time (the Hall logic value is "111"). Based on this result, it can be determined that the Hall fault is that at least one or more phases of the Hall sensors are open circuit.

[0090] In this embodiment, by monitoring the output signals of the Hall sensors of each phase at the same sampling time, once all sensor output signals are at a high level (i.e., "111" state) within the same commutation cycle, it can be immediately determined that there is an open circuit fault in the Hall sensor, thereby being able to quickly and accurately identify the abnormal open circuit state of the Hall sensor in real time, which helps to take timely measures to avoid further system failures, thereby improving the stability and reliability of the system.

[0091] In an exemplary embodiment, if the output signals of the Hall sensors of each phase at the same sampling time are equal in the same switching cycle, it is determined that a Hall fault exists, including:

[0092] If in the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are all low level, it is determined that the Hall fault is a short circuit of the Hall sensor.

[0093] For example, when there is no Hall fault, the output signals of the Hall sensors of each phase are as shown in Table 1 above. When a Hall sensor of one or more phases has a short circuit fault, the controller can only detect that the Hall sensor of that phase continuously outputs a low level (i.e., the corresponding output value is "0"). At this time, within a commutation cycle, the Hall logic value will inevitably be "000" at a certain sampling time. For example, taking the case where the Hall sensor of phase U has a short circuit fault, the output signals of the Hall sensors of each phase in Table 1 become as shown in Table 3 below.

[0094] Table 3

[0095]

[0096] It can be seen from Table 3 above that the output signals of the Hall sensors of each phase at the same sampling time are all low level (the Hall logic value is "000"). Based on this result, it can be determined that the Hall fault is a short circuit of at least one or more phases of the Hall sensors.

[0097] In this embodiment, by monitoring the output signals of the Hall sensors of each phase at the same sampling time, once all sensor output signals are at a low level (i.e., "000" state) within the same commutation cycle, it can be immediately determined that there is a Hall sensor short circuit fault, thereby being able to quickly and accurately identify the abnormal short circuit state of the Hall sensor in real time, which helps to take timely measures to avoid further system failures, thereby improving the stability and reliability of the system.

[0098] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0099] Based on the same inventive concept, the embodiment of the present application also provides a power generation control device for implementing the power generation control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more power generation control device embodiments provided below can refer to the limitations of the power generation control method above, and will not be repeated here.

[0100] In an exemplary embodiment, as shown in FIG12 , a power generation control device is provided, including: a sampling control module 1202 , a first switch tube control module 1204 , a second switch tube control module 1206 and a third switch tube control module 1208 , wherein:

[0101] The sampling control module 1202 is used to collect the output voltage of the bus capacitor at a preset sampling frequency and stop the phase-controlled voltage regulation control when the starter-generator is in the power generation mode and a Hall fault exists;

[0102] The first switch control module 1204 is used to control the upper bridge arm switch of the inverter circuit to remain in the off state and the lower bridge arm switch to be in the on state when the output voltage of the bus capacitor is greater than the upper limit of the preset voltage range;

[0103] The second switch control module 1206 is used to control the upper bridge arm switch and the lower bridge arm switch to be in a cut-off state when the output voltage of the bus capacitor is less than the lower limit of the preset voltage range;

[0104] The third switch tube control module 1208 is used to control the upper bridge arm switch tube to remain in the cut-off state and the lower bridge arm switch tube to be in the on state after the preset time when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the cut-off state, so that the battery and / or bus capacitor can supply power to the whole vehicle. The preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with the voltage difference between any value within the preset voltage range and the output voltage.

[0105] In an exemplary embodiment, the power generation control device further includes:

[0106] The Hall signal detection module is used to obtain the output signal of the Hall sensor of each phase when the phase-controlled voltage regulation control is stopped.

[0107] The voltage regulation control module is used to re-enter the phase-controlled voltage regulation control if the output signals of the Hall sensors of each phase are not the same at the same sampling time within the same phase switching cycle.

[0108] In an exemplary embodiment, the voltage regulation control module includes:

[0109] The voltage regulation control unit is used to re-enter the phase-controlled voltage regulation control when the count value is greater than or equal to the preset number of times in the same commutation cycle; the count value is the cumulative number of times in the same commutation cycle that the output signals of the Hall sensors of each phase are not the same at the same sampling time.

[0110] In an exemplary embodiment, the voltage regulation control module further includes:

[0111] The counting unit is used to reset and maintain the count value when the output signals of the Hall sensors of each phase are the same at the same sampling time in the same switching cycle until the next switching cycle begins.

[0112] In an exemplary embodiment, the power generation control device further includes:

[0113] The Hall fault determination module is used to determine the presence of a Hall fault when the output signals of the Hall sensors of each phase at the same sampling time are the same within the same switching cycle.

[0114] In an exemplary embodiment, the Hall fault determination module includes:

[0115] The open circuit determination unit is used to determine that the Hall fault is an open circuit of the Hall sensor when the output signals of the Hall sensors of each phase at the same sampling time are all high level in the same switching cycle.

[0116] In an exemplary embodiment, the Hall fault determination module further includes:

[0117] The short circuit determination unit is used to determine that the Hall fault is a Hall sensor short circuit when the output signals of the Hall sensors of each phase at the same sampling time are all low level in the same switching cycle.

[0118] Each module in the above power generation control device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0119] In an exemplary embodiment, a computer device is provided, which may be a controller, and its internal structure diagram may be shown in FIG13. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store the output voltage and output current data of the bus capacitor, and the output signal data of the Hall sensor. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a power generation control method is implemented.

[0120] Those skilled in the art will understand that the structure shown in FIG. 13 is merely a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0121] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0122] In an exemplary embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0123] In an exemplary embodiment, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the steps in the above method embodiments are implemented.

[0124] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0125] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0126] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A power generation control method, It is characterized in that Applied to a starter-generator integrated machine, the method comprises: When the integrated starter-generator is in the power generation mode and a Hall fault occurs, the output voltage of the bus capacitor is collected at a preset sampling frequency, and the phase-controlled voltage regulation control is stopped; If the output voltage of the bus capacitor is greater than the upper limit of the preset voltage range, the upper bridge arm switch tube of the inverter circuit is controlled to remain in the off state and the lower bridge arm switch tube is in the on state; If the output voltage of the bus capacitor is less than the lower limit of the preset voltage range, the upper bridge arm switch tube and the lower bridge arm switch tube are controlled to be in a cut-off state; After the preset time when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the cut-off state, the upper bridge arm switch tube is controlled to remain in the cut-off state and the lower bridge arm switch tube is in the on state, so that the battery and / or the bus capacitor supplies power to the entire vehicle, the preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with any value within the preset voltage range and the voltage difference between the output voltage.

2. The power generation control method according to claim 1, It is characterized in that The method further comprises: When the phase-controlled voltage regulation control is stopped, the output signal of the Hall sensor of each phase is obtained; If the output signals of the Hall sensors of each phase are not the same at the same sampling time in the same commutation cycle, the phase-controlled voltage regulation control is re-entered.

3. The power generation control method according to claim 2, It is characterized in that If the output signals of the Hall sensors of each phase are not the same at the same sampling time in the same commutation cycle, the phase-controlled voltage regulation control is re-entered, including: If the count value is greater than or equal to the preset number of times in the same commutation cycle, the phase-controlled voltage regulation control is re-entered; the count value is the cumulative number of times in the same commutation cycle that the output signals of the Hall sensors of each phase are not the same at the same sampling time.

4. The power generation control method according to claim 3, It is characterized in that The method further comprises: If the output signals of the Hall sensors of each phase are the same at the same sampling time in the same switching cycle, the count value is reset and maintained until the next switching cycle.

5. The power generation control method according to claim 1, It is characterized in that The method further comprises: If the output signals of the Hall sensors of each phase are the same at the same sampling time in the same commutation cycle, it is determined that the Hall fault exists.

6. The power generation control method according to claim 5, It is characterized in that If the output signals of the Hall sensors of each phase at the same sampling time are the same within the same commutation cycle, it is determined that the Hall fault exists, including: If, in the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are all high level, it is determined that the Hall fault is an open circuit of the Hall sensor.

7. The power generation control method according to claim 5, It is characterized in that If the output signals of the Hall sensors of each phase are equal at the same sampling time in the same switching cycle, it is determined that the Hall fault exists, including: If, in the same commutation cycle, the output signals of the Hall sensors of each phase at the same sampling time are all low level, it is determined that the Hall fault is a short circuit of the Hall sensor.

8. A power generation control device, It is characterized in that The device comprises: The sampling control module is used to collect the output voltage of the bus capacitor at a preset sampling frequency and stop the phase-controlled voltage regulation control when the starter-generator is in the power generation mode and a Hall fault exists; A first switch tube control module, used for controlling the upper bridge arm switch tube of the inverter circuit to remain in a cut-off state and the lower bridge arm switch tube to be in a conducting state when the output voltage of the bus capacitor is greater than an upper limit value of a preset voltage range; A second switch tube control module, used for controlling the upper bridge arm switch tube and the lower bridge arm switch tube to be in a cut-off state when the output voltage of the bus capacitor is less than the lower limit value of the preset voltage range; The third switch tube control module is used to control the upper bridge arm switch tube to remain in the off state and the lower bridge arm switch tube to be in the on state after the preset time when the upper bridge arm switch tube and the lower bridge arm switch tube both enter the off state, so that the battery and / or the bus capacitor can supply power to the whole vehicle, and the preset time is negatively correlated with the preset sampling frequency, and the preset time is positively correlated with the voltage difference between any value within the preset voltage range and the output voltage.

9. A controller comprising a memory and a processor, wherein the memory stores a computer program. It is characterized in that When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A starter-generator integrated machine, It is characterized in that The integrated starter-generator comprises the controller as claimed in claim 9.

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