Monitoring control device and monitoring control method

Abstract

MONITORING CONTROL DEVICE AND MONITORING CONTROL METHOD. The present invention relates to a monitoring control device for determining whether there is an abnormality in the detection of the rotational state of a rotating body, comprising: a rotation sensor to detect the rotational state of the rotating body and emit an analog signal corresponding to the detected rotational state; a converter to, based on the analog signal, calculate a first absolute angle of the rotating body at a first time and emit a signal including the first absolute angle; a first control device 10 to acquire the first absolute angle; and a second control device 20 to, based on the analog signal, calculate a second absolute angle of the rotating body at a second time different from the first time.The first control device I0 generates a first diagnostic signal based on the first absolute angle and sends the first diagnostic signal to the second control device. The second control device generates a second diagnostic signal based on the second absolute angle and determines if there is an abnormality in the rotation state detection by comparing the first diagnostic signal and the second diagnostic signal.

Description

1 / 18 MONITORING CONTROL DEVICE AND MONITORING CONTROL METHOD FIELD OF TECHNIQUE

[001] The present invention relates to a monitoring control device and a monitoring control method for diagnosing the presence / absence of a fault detection in a rotation state. FUNDAMENTALS OF THE INVENTION

[002] Conventionally, in a rotation angle sensing device including a plurality of rotation angle sensing elements and a plurality of AD converters, a device is known to be configured to calculate a rotation angle at a reference time in an AD converter collapse (Patent Document 1). In this rotation angle sensing device, the plurality of AD converters obtains cosine and sine signals from analog outputs of a plurality of rotation angle sensing elements corresponding to a rotation angle of a sensing target and converts them sequentially into cosine and sine values ​​as digital values ​​in constant conversion cycles. At this point, the AD conversion times are synchronized between the plurality of AD converters.An angle calculation processing unit included in the rotation angle detection device calculates a plurality of interchangeable angles upon the collapse of the AD converter. Patent Document 1: JP-A-2017-67695 DISCLOSURE OF THE INVENTION PROBLEMS TO BE SOLVED BY THE INVENTION

[003] However, in the rotation angle detection device described above, there is a problem that the AD conversion times need to be mutually synchronized between the plurality of AD converters. Petition 870250090951, dated 06 / 10 / 2025, page 14 / 66 2 / 18

[004] One objective of the present invention is to provide a monitoring control device and a monitoring control method capable of diagnosing a fault in detecting a rotation state without the need for synchronization of analog signal conversion times. SOLUTIONS TO THE PROBLEMS

[005] The present invention solves the problem described above: by detecting a rotor's rotational state and emitting an analog signal in response to the rotational state detected by a rotation sensor; by calculating a first absolute angle of the rotor at a first time based on the analog signal by a converter; by generating a first diagnostic signal based on the first absolute angle by a first control device; by calculating a second absolute angle of the rotor at a second time different from the first time based on the analog signal, by generating a second diagnostic signal based on the second absolute angle and by comparing the first diagnostic signal with the second diagnostic signal to diagnose the presence / absence of a rotational state detection fault by a second control device. EFFECTS OF THE INVENTION

[006] With the present invention, the failure to detect the rotation state can be diagnosed without the need to synchronize the conversion times of the analog signals. BRIEF DESCRIPTION OF THE DRAWINGS

[007] Figure 1 is a block of a monitoring control device according to the modality.

[008] Figure 2 is a block of a monitoring control device according to another embodiment of the present invention. DETAILED DESCRIPTION

[009] The following describes a monitoring control device and Petition 870250090951, dated 06 / 10 / 2025, page 15 / 66 3 / 18 A monitoring control method according to the embodiment of the present invention based on the drawings. In this embodiment, a description will be given with an example in which the monitoring control device is mounted on a vehicle drive system. The monitoring control device can be mounted on a system that drives a device including at least one rotor, such as a motor, not limited to the vehicle drive system. "First Mode"

[010] Figure 1 is a block diagram illustrating a monitoring control device 1 according to an embodiment of the present invention. The monitoring control device 1 illustrated in Figure 1 is mounted on a vehicle drive system. The vehicle drive system is a system for driving a motor using electrical energy from a battery. A vehicle in which the drive system is mounted is a vehicle that includes a motor, such as a hybrid vehicle, a plug-in vehicle, and an electric vehicle. The motor is driven by a three-phase current supplied by an inverter (INV). The motor can function as an electric generator, and the electrical energy generated by the regenerating motor is supplied to the battery through the inverter.

[011] The monitoring control device 1 includes a resolver 2, a converter RD 3, a first control device 10 and a second control device 20. The monitoring control device 1 includes a control system (hereinafter referred to as a main system) for detecting the state of a rotor (rotator) included in a motor and controlling the motor through an inverter in response to a detected value, and a monitoring system (hereinafter referred to as the monitoring system) separate from the control system. The main system is connected to the inverter from the resolver 2 through the converter RD 3 and the first control device 10, and is configured with a signal line through which an analog output signal from the resolver 2, a signal Petition 870250090951, dated 06 / 10 / 2025, page 16 / 66 4 / 18 angular (encoder signal) converted from the analog signal by converter RD 3, and a motor control signal passthrough. The monitoring system is arranged to obtain the output signal from resolver 2 through a system other than the main system and determine whether a detection fault has occurred in the main system or not.

[012] Resolver 2 is mechanically connected to the rotor included in the motor. Resolver 2 is a rotation sensor that detects a rotor rotation angle and outputs a detected value as an analog value. Resolver 2 outputs the rotor rotation angle as a two-phase AC voltage (analog signal) modulated by a sine wave and a cosine wave using an excitation signal input from converter RD 3 as a carrier wave.

[013] The RD 3 converter samples the analog signal output from resolver 2 and generates a digital signal by an AD (analog-to-digital conversion) of the sampled voltage value. The digital signal is a two-phase encoder signal (phase AB) obtained by sampling each sine wave and the cosine wave included in the analog signal. The AB-phase digital signal includes information about a relative rotor angle. The RD 3 converter calculates an absolute rotor angle based on the detected value from resolver 2. The absolute angle is a value that indicates an absolute position of the rotor from a reference position with an angle. The relative angle indicates how much the rotor moved before and after the movement and corresponds to an amount of rotational displacement of the rotor. The absolute angle is indicated by a code and the relative angle is indicated by an output waveform of the AB signal.In other words, the RD 3 converter calculates the absolute angle and the relative angle of the rotor based on the analog signal from the resolver and outputs an angle signal including the absolute angle and an angle signal including the relative angle. The RD 3 converter outputs the angle signal including the absolute angle to the first control device 10 and outputs the angle signal including the relative angle to the first. Petition 870250090951, dated 06 / 10 / 2025, page 17 / 66 5 / 18 control device 10 and the second control device 20. Hereinafter, the absolute angle calculated by converter RD 3 is referred to as a first absolute angle and the relative angle calculated at the same time as the first absolute angle is referred to as a first relative angle.

[014] The first control device 10 obtains the first absolute angle and the first relative angle from the converter RD 3, calculates a control command value for motor control in response to the first absolute angle and the first relative angle, and outputs a motor control signal including the control command value for the inverter (INV). The first control device 10 includes a CPU and memory, such as RAM or ROM, and executes a program stored in memory by the CPU, thus performing various types of control functions. The first control device 10 includes a control unit 11 and a blocking signal unit 12 as function blocks. The control unit 11 has the function of obtaining the angle signal from the converter RD 3, a function of controlling the motor, a function of generating a signal for diagnostics, and the like. The control unit 11 simultaneously obtains the first absolute angle and the first relative angle.Next, control unit 11 calculates the current angular speed of the motor from the first absolute angle and / or the first relative angle. Control unit 11 calculates the control command value using a PI controller based on a required torque input from the outside, the calculated angular speed, and similar factors, and sends the motor control signal to the inverter. Control unit 11 generates a first diagnostic signal based on the first absolute angle and sends it to the second control device 20. The first diagnostic signal includes information about the first absolute angle used for motor control. That is, control unit 11 sends information about the rotor rotation angle used for motor control to the second control device 20 for diagnostics. A. Petition 870250090951, dated 06 / 10 / 2025, page 18 / 66 Control unit 11 generates a signal based on the first relative angle and sends it to the second control device 20. Control unit 11 can directly output the angle signal received from converter RD 3, including the first absolute angle, to the second control device 20 as the first diagnostic signal. Control unit 11 can directly output the angle signal received from converter RD 3, including the second absolute angle, to the second control device 20.

[015] The signal lockout unit 12 blocks the motor control signal output from the first control device 10 to the inverter in response to a lockout signal transmitted from a diagnostic unit 23 described further below. The lockout signal is emitted from the diagnostic unit 23 when a rotor rotation state detection fault is diagnosed. When the lockout signal is received from the diagnostic unit 23, the signal lockout unit 12 blocks the motor control signal generated by the control unit 11. When the motor control signal is blocked, the signal lockout unit 12 can determine that a fault is present in the rotor rotation state detection and can perform fail-safe control by, for example, stopping motor control or issuing an external warning or similar.When the blocking signal is not received from diagnostic unit 23, the signal blocking unit 12 sends the motor control signal generated by control unit 11 to the inverter without blocking it.

[016] The second control device 20 obtains the analog signal from the resolver, calculates the second absolute angle based on the analog signal, generates a second diagnostic signal based on the second absolute angle, and compares the first diagnostic signal with the second diagnostic signal to diagnose the presence / absence of the rotor rotation state detection fault. The second control device 20 includes a CPU and memory such as RAM or a Petition 870250090951, dated 06 / 10 / 2025, page 19 / 66 7 / 18 The ROM executes a program stored in memory by the CPU, thus performing various types of control functions. The second control device 20 includes a different CPU than the CPU included in the first control device 10. The second control device 20 includes an absolute angle calculation unit 21, an absolute angle estimation unit 22, and a diagnostic unit 23 as function blocks.

[017] The absolute angle calculation unit 21 specifies a sine function (sin θ) and a cosine function (cos θ) representing the rotation angle of the analog signal output of the solver 2 and receives an arctangent (arctan [sin θ / cos θ]), thus calculating the absolute angle of the rotor. The calculation time of the absolute angle in the absolute angle calculation unit 21 is a different time from that of the first absolute angle calculated by the AD conversion in the RD 3 converter. That is, the calculation time of the absolute angle calculation unit 21 is not synchronized with the calculation time of the RD 3 converter, and they are different times. Hereafter, an absolute angle calculated by the absolute angle calculation unit 21 is referred to as a second absolute angle. A relative rotor angle obtained at the same time as the calculation time of the second absolute angle is referred to as a second relative angle.Therefore, since the first absolute angle is not calculated at the same time as the second absolute angle, a time difference is generated between the first absolute angle and the second absolute angle. The absolute angle calculation unit 21 generates the second diagnostic signal based on the second absolute angle and sends it to the absolute angle estimation unit 22. The second diagnostic signal includes information about the second absolute angle and, in other words, includes information about the rotation angle calculated at a different time than that of the first absolute angle used for motor control.

[018] The absolute angle estimation unit 22 obtains the second Petition 870250090951, dated 06 / 10 / 2025, page 20 / 66 8 / 18 relative angle calculated by converter RD 3 at the same time as the second absolute angle and obtains the first relative angle from control unit 11. Absolute angle estimation unit 22 estimates an estimate value of the first absolute angle based on the second absolute angle, the first relative angle and the second relative angle using a formula (1) below. [Mathematics. 1] θΐ-e = θ2 — (Δθ2 - Δθ1) (1) It should be noted that θ1_β indicates the estimated value of the first absolute angle, Θ2 indicates the second absolute angle, ΔΘ1 indicates the first relative angle, and Δθ2 indicates the second relative angle.

[019] The absolute angle estimation unit 22 adds information about the estimate value of the first absolute angle to the second diagnostic signal generated by the absolute angle calculation unit 21 and outputs it as the second diagnostic signal to the diagnostic unit 23. Since the estimate value of the first absolute angle is a value calculated based on the second absolute angle, the second diagnostic signal output from the absolute angle estimation unit 22 to the diagnostic unit 23 is a signal based on the second absolute angle.

[020] Diagnostic unit 23 compares the first diagnostic signal output of control unit 11 with the second diagnostic signal output of absolute angle estimation unit 22 and diagnoses the presence / absence of the rotor rotation state detection fault. Specifically, diagnostic unit 23 specifies the first absolute angle of the first diagnostic signal, specifies the estimate value of the first absolute angle of the second diagnostic signal, and calculates a difference between the first absolute angle and the estimate value of the first absolute angle. In diagnostic unit 23, a threshold value for determining the detection fault is defined. Petition 870250090951, dated 06 / 10 / 2025, page 21 / 66 9 / 18 preliminarily. The determination threshold value is defined to be, for example, a value greater than a detection error. Therefore, when the difference between the first absolute angle and the estimated value of the first absolute angle is less than the determination threshold value, diagnostic unit 23 determines that the absolute angle calculated by converter RD 3 is an accurate value and diagnoses that the detection fault is not present. Meanwhile, when the difference between the first absolute angle and the estimated value of the first absolute angle is the determination threshold value or greater, diagnostic unit 23 determines that the detection fault is present. For example, when an AD conversion fault occurs by converter RD 3, or when a fault occurs in a main system signal line or a monitoring system signal line, the value of the first absolute angle and / or the second absolute angle becomes an outlier.In this mode, the first absolute angle is obtained from the first control device 10 using the signal line from the main system, and the second absolute angle is obtained using the signal line from the monitoring system with a time difference from the first absolute angle. Therefore, when a detection failure occurs, a large angle difference is generated between the first absolute angle and the second absolute angle with the time difference. In this mode, the detection failure is diagnosed based on the magnitude of the angle difference.

[021] When a rotor rotation state detection fault is detected, diagnostic unit 23 sends a lockout signal to signal lockout unit 12. When a rotor rotation state detection fault is not detected, diagnostic unit 23 does not send a lockout signal to signal lockout unit 12.

[022] As described above, in this mode, resolver 2 detects the rotor's rotation state and outputs the analog signal in response to the detected rotation state, converter RD 3 calculates the first absolute angle of the rotor in Petition 870250090951, dated 06 / 10 / 2025, page 22 / 66 10 / 18 first time based on the analog signal and emits the signal including information about the first absolute angle, and the first control device 10 generates the first diagnostic signal based on the first absolute angle and emits the first diagnostic signal to the second control device 20. Then, the second control device 20 calculates the second absolute angle of the rotor at a second time different from the first time based on the analog signal, generates the second diagnostic signal based on the second absolute angle, and compares the first diagnostic signal with the second diagnostic signal to diagnose the presence / absence of the rotor rotation state detection fault. Therefore, the monitoring control device 1 or the monitoring control method according to the modality can diagnose the rotation state detection fault without the need for synchronization of the analog signal conversion times.In this mode, when an AD conversion failure occurs in the RD 3 converter, and when a failure occurs in the main system signal line or in the monitoring system signal line, the failure can be detected.

[023] Now, as a device for diagnosing rotor rotation state detection failure, which is different from the device in this mode, a device below is considered. For example, a plurality of AD converters is connected to a resolver, the AD conversion times are synchronized between the plurality of AD converters and the digital output signals of the plurality of AD converters are mutually compared, thus diagnosing the rotor rotation state detection failure. In such a device, there is the problem that synchronization between the plurality of AD converters is necessary and AD converters with high computational precision are needed for synchronization. In addition, there is a problem that when three or more AD converters need to be synchronized, it is difficult to synchronize them. Petition 870250090951, dated 06 / 10 / 2025, page 23 / 66 11 / 18

[024] However, in this mode, since it is not necessary to synchronize the conversion times of the analog signals in the calculation of the absolute angle, the problem described above can be solved.

[025] In this mode, the first diagnostic signal includes information about the first absolute angle and the second diagnostic signal includes information about the second absolute angle. This allows for the diagnosis of the rotation state detection fault without the need for synchronization of the analog signal conversion times.

[026] In this mode, the RD converter calculates each of the first relative rotor angle at the first time and the second relative rotor angle at the second time based on the analog signal from resolver 2 and outputs each signal including information about the first relative angle and the signal including information about the second relative angle. Then, the second control device 20 estimates the estimated value of the first absolute angle based on the second absolute angle, the first relative angle and the second relative angle and compares the estimated value with the first absolute angle included in the first diagnostic signal to diagnose the presence / absence of the rotor rotation state detection fault. This allows diagnosis of the rotation state detection fault without the need for synchronization of the analog signal conversion times.

[027] Although the absolute angle estimation unit 22 obtains the first relative angle from the control unit 11 in this embodiment, the first relative angle can be obtained from the converter RD 3. In this embodiment, the number of monitoring systems is not limited to one, and a plurality of monitoring systems can be arranged. When a plurality of monitoring systems is arranged, the monitoring systems are formed in such a way that a plurality of control devices equals the second device of Petition 870250090951, dated 06 / 10 / 2025, page 24 / 66 12 / 18 control 20 is arranged corresponding to the monitoring systems and the signal line of the analog signal from resolver 2 is branched to send the analog signal from resolver 2 to each of the control devices. Then, when the blocking signal is received from any of the diagnostic units 23 among the diagnostic units 23 included in the respective plurality of second control devices 20, the signal blocking unit 12 blocks the engine control signal. Consequently, since synchronization is not required even when a plurality of monitoring systems is arranged, software processing load can be reduced and fault detection can be accurately diagnosed. "Second Modality"

[028] Figure 2 is a block diagram illustrating a monitoring control device 1 according to another embodiment of the present invention. In this embodiment, a portion of a control by a first control device 10 and a portion of a control by a second control device 20 are different from those in the first embodiment. The different configuration of this is the same as the first embodiment described above, and explanations of the configuration and control processing identical to those of the first embodiment are omitted in the following description, while the omitted explanations are appropriately incorporated into the descriptions of the first embodiment.

[029] A control unit 11 included in the first control device 10 calculates a rotor rotation speed based on the first absolute angle. The control unit 11 obtains the first absolute angle from an RD 3 converter in a predetermined cycle, calculates a difference between a current value and a previous value of the first absolute angle, and calculates a first rotor rotation speed from the calculated difference of the first absolute angle. The control unit 11 generates a first diagnostic signal including Petition 870250090951, dated 06 / 10 / 2025, page 25 / 66 13 / 18 information about the first rotation speed is sent to a diagnostic unit 23 of the second control device 20. Since the first rotation speed is a value calculated based on the first absolute angle, the first diagnostic signal is a signal based on the first absolute angle.

[030] The second control device 20 includes an absolute angle calculation unit 21, a rotation speed calculation unit 24, and the diagnostic unit 23. The absolute angle calculation unit 21 is similar to the absolute angle calculation unit 21 in the first embodiment. The rotation speed calculation unit 24 calculates a rotor rotation speed based on the second absolute angle. The rotation speed calculation unit 24 obtains the second absolute angle calculated by the absolute angle calculation unit 21 in the predetermined cycle, calculates a difference between a current value and a previous value of the second absolute angle, and calculates a second rotor rotation speed from the calculated difference of the second absolute angle.The calculation time for the previous value of the first absolute angle is different from the calculation time for the previous value of the second absolute angle, and the calculation time for the current value of the first absolute angle is different from the calculation time for the current value of the second absolute angle. The calculation time for the first absolute angle is the calculation time in the RD 3 converter, and the calculation time for the second absolute angle is the calculation time in the absolute angle calculation unit 21.

[031] The rotation speed calculation unit 24 generates a second diagnostic signal including information about the second rotation speed and sends the second diagnostic signal to the diagnostic unit 23. Since the second rotation speed is a value calculated based on the second absolute angle, the second diagnostic signal is a signal based on the second absolute angle. Petition 870250090951, dated 06 / 10 / 2025, page 26 / 66 14 / 18

[032] Diagnostic unit 23 compares the first diagnostic signal output of control unit 11 with the second diagnostic signal output of rotation speed calculation unit 24 and diagnoses the presence / absence of the rotor rotation state detection fault. Specifically, diagnostic unit 23 specifies the first rotation speed from the first diagnostic signal, specifies the second rotation speed from the second diagnostic signal, and calculates a difference between the first rotation speed and the second rotation speed. In diagnostic unit 23, a determination threshold value to determine the detection fault is preliminarily defined. The determination threshold value is defined to be, for example, a value greater than a detection error. The determination threshold value is indicated by the rotation speed in a different way from the first mode.Therefore, when the difference between the first rotation speed and the second rotation speed is less than the determination limit value, the diagnostic unit 23 determines that the rotation speed calculated by the converter RD 3 is an accurate value and diagnoses that the detection fault is not present. Meanwhile, when the difference between the first rotation speed and the second rotation speed is the determination limit value or greater, the diagnostic unit 23 determines that the detection fault is present. In this mode, the first rotation speed is obtained from the first control device 10 using the main system signal line, and the second rotation speed is obtained using the monitoring system signal line with a time difference from the first rotation speed.Therefore, when the detection failure occurs, a large difference in rotational speed is generated between the first rotational speed and the second rotational speed with the time difference. In this mode, the detection failure is diagnosed based on the magnitude of the rotational speed difference. Petition 870250090951, dated 06 / 10 / 2025, page 27 / 66 15 / 18

[033] Diagnostic unit 23 obtains the first relative angle and the second relative angle calculated by converter RD 3, calculates a difference between the first relative angle and the second relative angle, and calculates an amount of rotor speed variation from the calculated difference. In diagnostic unit 23, a variation determination limit value is preliminarily established to determine the rotor speed variation. Diagnostic unit 23 compares the calculated amount of rotation speed variation with the variation determination limit value, and when the calculated amount of rotation speed variation is the variation determination limit value or greater, diagnostic unit 23 determines that the rotation speed has varied.Therefore, when it is determined that the rotational speed has varied, diagnostic unit 23 interrupts the fault diagnosis of the rotational state detection based on the difference between the first rotational speed and the second rotational speed. For example, when the rotor's rotational speed has varied due to an external torque request or similar, whether the difference between the first rotational speed and the second rotational speed is due to the variation in rotational speed or due to a fault detection cannot be determined. Therefore, when the variation in rotational speed is large, the fault diagnosis of the rotational state detection is interrupted.On the other hand, when the calculated amount of change in rotational speed is less than the change determination threshold value, diagnostic unit 23 determines that the rotational speed has not changed or the change in rotational speed is small, and diagnostic unit 23 continues diagnosing the rotational state detection failure.

[034] When the rotor rotation state detection fault is determined to be present, diagnostic unit 23 sends a lockout signal to signal lockout unit 12. When the rotor rotation state detection fault is determined to be present, diagnostic unit 23 sends a lockout signal to signal lockout unit 12. When the rotor rotation state detection fault is determined to be present, diagnostic unit 23 sends a lockout signal to signal lockout unit 12. Petition 870250090951, dated 06 / 10 / 2025, p. 28 / 66 16 / 18 rotor rotation is determined to be absent, diagnostic unit 23 does not send the lockout signal to signal lockout unit 12.

[035] As described above, in this embodiment, the first control device 10 calculates the first rotor speed based on the first absolute angle and generates the first diagnostic signal including information about the first speed, and the second control device 20 calculates the second rotor speed based on the second absolute angle, generates the second diagnostic signal including information about the second speed, and compares the first speed with the second speed to diagnose the presence / absence of the rotation state detection fault. This allows diagnosis of the rotation state detection fault without the need for synchronization of the analog signal conversion times.In this mode, when an AD conversion failure occurs in the RD 3 converter, and when a failure occurs in the main system signal line or in the monitoring system signal line, the failure can be detected.

[036] In this mode, the RD 3 converter calculates the relative rotor angle based on the analog signal and outputs the signal including the relative angle, and the second control device 20 calculates the amount of rotor speed variation based on the relative angle and interrupts the fault detection / presence diagnosis of the rotation state when the amount of variation is the predetermined limit value (variation determination limit value) or higher. This allows avoiding false detection when the rotation speed varies.

[037] In this mode, the number of monitoring systems is not limited to one, and a plurality of monitoring systems may be deployed. When a plurality of monitoring systems is deployed, the systems of Petition 870250090951, dated 06 / 10 / 2025, page 29 / 66 17 / 18 monitoring systems are configured so that the control devices, even if the second control device 20 is arranged corresponding to the monitoring systems, and the signal line of the analog signal from resolver 2 is branched to send the analog signal from resolver 2 to each of the control devices. Then, when the blocking signal is received from any of the diagnostic units 23 among the diagnostic units 23 included in the respective plurality of second control devices, the signal blocking unit 12 blocks the engine control signal. Consequently, since synchronization is not required even when a plurality of monitoring systems is arranged, software processing load can be reduced and fault detection can be accurately diagnosed.

[038] Although embodiments of the present invention have been described above, these embodiments are described to facilitate understanding of the present invention and not to limit the present invention. Therefore, the components disclosed in the embodiments described above are intended to include all design changes and equivalents within the technical scope of the present invention. DESCRIPTION OF REFERENCE SIGNALS monitoring control device resolver converter first control device control unit signal blocking unit second control device absolute angle calculation unit absolute angle estimation unit Petition 870250090951, dated 06 / 10 / 2025, page 30 / 66 18 / 18 diagnostic unit rotation speed calculation unit Petition 870250090951, dated 06 / 10 / 2025, page 31 / 66

Claims

1 / 5 CLAIMS 1. Monitoring control device (1) CHARACTERIZED in that it comprises: - a rotation sensor (2) that detects a rotation state of a rotor and emits an analog signal in response to the detected rotation state, the analog signal including a sine wave and a cosine wave; - a converter (3) configured to calculate a first absolute angle of the rotor in a first time based on the analog signal and emits a signal including information about the first absolute angle; - a first control device (10) configured to obtain the first absolute angle;and - a second control device (20) configured to calculate a second absolute rotor angle at a different time than the first time based on the analog signal, wherein: - the converter (3) is configured: - to calculate each of a first relative rotor angle at the first time and a second relative rotor angle at the second time based on the analog signal; and - to output each of a signal including information about the first relative angle and a signal including information about the second relative angle, - the first control device (10) is configured to generate a first diagnostic signal based on the first absolute angle and outputs the first diagnostic signal to the second control device (20), and - the second control device (20) is configured: - to obtain the first relative angle and the second relative angle;Petition 870250090951, dated 06 / 10 / 2025, page 32 / 66 2 / 5 - to estimate an estimate value of the first absolute angle based on the second absolute angle, the first relative angle, and the second relative angle; - to generate a second diagnostic signal based on the second absolute angle; and - to compare the estimate value included in the second diagnostic signal with the first absolute angle included in the first diagnostic signal to diagnose the presence / absence of a rotation state detection fault.

2. Monitoring control device (1), according to claim 1, CHARACTERIZED in that: - the first diagnostic signal includes information about the first absolute angle, and - the second diagnostic signal includes information about the second absolute angle.

3. Monitoring control device (1) CHARACTERIZED in that it comprises: - a rotation sensor (2) that is configured to detect a rotation state of a rotor and to emit an analog signal in response to the detected rotation state, the analog signal including a sine wave and a cosine wave; - a converter (3) that is configured to calculate a first absolute angle of the rotor at a first time based on the analog signal and to emit a signal including information about the first absolute angle; - a first control device (10) that is configured to obtain the first absolute angle; and - a second control device (20) that is configured to calculate a second absolute angle of the rotor at a second time different from the first time based on the analog signal,wherein: - the first control device (10) is configured to calculate a difference between a current value and a previous value of the first absolute angle, to calculate a first rotor speed from the calculated difference of the first absolute angle and to generate a first diagnostic signal including information about the first speed of rotation, - the second control device (20) is configured to calculate a difference between a current value and a previous value of the second absolute angle, to calculate a second rotor speed from the calculated difference of the second absolute angle and to generate a second diagnostic signal including information about the second speed of rotation, - the second control device (20) is configured to compare the first speed of rotation with the second speed of rotation to diagnose the presence / absence of a fault in detecting the rotation state,- the converter (3) is configured to calculate each of a first relative rotor angle in the first time and a second relative rotor angle in the second time based on the analog signal and to output each of a signal including information about the first relative angle and a signal including information about the second relative angle, - the second control device (20) is configured to obtain the first relative angle and the second relative angle and to calculate a difference between the first relative angle and the second relative angle and to calculate an amount of variation in the rotor rotation speed from the calculated difference, and - the second control device (20) is configured to interrupt the Petition 870250090951, dated 06 / 10 / 2025, page 34 / 66 4 / 5 fault presence / absence detection diagnosis of the rotation state when the amount of variation is a predetermined limit value or more.

4. Monitoring control method for diagnosing the presence / absence of a fault detection of a rotor rotation state, CHARACTERIZED in that it comprises: - detecting the rotor rotation state and emitting an analog signal in response to the rotation state detected by a rotation sensor (2), the analog signal including a sine wave and a cosine wave; - calculating a first absolute rotor angle at a first time based on the analog signal and emitting a signal including the first absolute angle through a converter (3); - calculating each of a first relative rotor angle at the first time and a second relative rotor angle at a second time different from the first time based on the analog signal through the converter (3) to a first control device (10);- emit each of a signal including information about the first relative angle and a signal including information about the second relative angle through the converter (3); - generate a first diagnostic signal based on the first absolute angle and emit the first diagnostic signal to a second control device (2) through the first control device (10) that controls the rotor; - calculate a second absolute angle of the rotor in the second time based on the analog signal through the second control device (20); - obtain the first relative angle and the second relative angle through the second control device (20); Petition 870250090951, dated 06 / 10 / 2025, page 35 / 66 5 / 5 - estimate an estimate value of the first absolute angle based on the second absolute angle, the first relative angle and the second relative angle through the second control device (20);- generate a second diagnostic signal based on the second absolute angle through the second control device (20); and - compare the estimate value included in the second diagnostic signal with the first absolute angle included in the first diagnostic signal to diagnose the presence / absence of the rotation state detection failure through the second control device (20). Petition 870250090951, dated 06 / 10 / 2025, page 36 / 66;

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