JP5482625B2 - Rotating machine control device - Google Patents

Description

  The present invention relates to a control device for a rotating machine that controls a control amount of the rotating machine by operating an AC voltage applying unit that applies an AC voltage to the rotating machine including a permanent magnet.

  As this type of control device, for example, as can be seen in Patent Document 1 below, the relationship between the required torque and rotational speed for a three-phase motor including a permanent magnet and the norm of the output voltage vector of the AC voltage applying means (inverter) is shown. There has also been proposed a method for setting a norm of an inverter output voltage vector using a predetermined map. Here, the phase of the output voltage of the inverter is an operation amount of torque feedback control.

  By the way, when so-called demagnetization, which is an abnormality in which the magnetic flux of the permanent magnet included in the electric motor is reduced, inconveniences such as the actual torque being smaller than the required torque occur. For this reason, as shown in, for example, Patent Document 2 below, there is also proposed a method for determining the presence or absence of so-called demagnetization in which the magnetic flux of the permanent magnet decreases. Specifically, whether or not demagnetization is performed based on the difference between the command voltage and the reference value when operating the command voltage as an operation amount for performing current feedback control so as to obtain a command current corresponding to the required torque for the three-phase motor. Judging.

JP 2009-232531 A Japanese Patent No. 4223880

  By the way, in the technique described in Patent Document 1, since the norm of the output voltage vector of the inverter is given by open loop control, the technique described in Patent Document 2 cannot determine the presence or absence of demagnetization. .

  The present invention has been made in the process of solving the above-mentioned problems, and its purpose is to detect the abnormality of the magnetic flux of the permanent magnet even when it has an open loop operation amount for the output voltage vector of the AC voltage applying means. An object of the present invention is to provide a new control device for a rotating machine capable of diagnosing the presence or absence.

  Hereinafter, means for solving the above-described problems and the operation and effect thereof will be described.

  The invention according to claim 1 is a control device for a rotating machine that controls an amount of control of the rotating machine by operating an AC voltage applying unit that applies an AC voltage to the rotating machine including a permanent magnet. A norm setting means for setting a basic norm of an output voltage vector of the AC voltage applying means as an open-loop operation amount for controlling the torque to a required torque, at least a q-axis current flowing through the rotating machine and a torque of the rotating machine Phase setting means for setting the phase of the output voltage of the AC voltage application means as an operation amount for feedback control of one of the d-axis current flowing through the rotating machine and the phase setting means is different from the phase setting means. A feedback control means using a parameter as a control amount and an operation amount for performing feedback control of a current flowing through the rotating machine. A correction amount calculating means for calculating a correction amount of the current, an operating means for operating the AC voltage applying means based on the basic norm corrected by the correction amount and the set phase, and the correction amount within a predetermined range. Diagnostic means for diagnosing that an abnormality has occurred in the magnetic flux of the permanent magnet based on the deviation from the magnetic field.

  When an abnormality occurs in the magnetic flux of the permanent magnet, the norm required for controlling the control amount changes because the induced voltage changes. For this reason, the said correction amount becomes a parameter which has the information regarding the change of the magnetic flux of a permanent magnet. In view of this point, the above invention diagnoses whether or not an abnormality has occurred in the magnetic flux of the permanent magnet using the correction amount.

  According to a second aspect of the present invention, in the first aspect of the present invention, the diagnostic means has an abnormality in which the magnetic flux of the permanent magnet decreases based on the correction amount that reduces and corrects the basic norm. It is characterized by making a diagnosis.

  When the magnetic flux of the permanent magnet decreases, the induced voltage at the same electrical angular velocity decreases, so the norm required for controlling the control amount decreases. In the above invention, in view of this point, the presence or absence of an abnormality in which the magnetic flux of the permanent magnet decreases is diagnosed.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the norm setting means uniquely sets the basic norm according to a required torque of the rotating machine and an electrical angular velocity of the rotating machine. And the predetermined range is at least one of the temperature of the permanent magnet, the current flowing through the rotating machine, the torque of the rotating machine, the inductance of the rotating machine, the electrical angular velocity of the rotating machine, and the resistance of the rotating machine. It is characterized in that it is variably set based on the above.

  An appropriate norm for controlling the required torque changes according to the magnetic flux of the permanent magnet, while the magnetic flux of the permanent magnet has temperature dependency. Also, the appropriate norm will vary depending on the inductance and resistance of the rotating machine, while these may vary. For this reason, an appropriate norm changes according to the temperature, inductance, and resistance of the permanent magnet. On the other hand, if the basic norm is not variably set according to these, the deviation between the optimal norm and the basic norm due to the variation of these parameters is compensated by the correction amount. For this reason, if the predetermined range is variably set according to these parameters, the compensation amount can be included in the predetermined range. Note that the inductance of the rotating machine can change according to the current flowing through the rotating machine, and the torque is a parameter having a correlation with the current. For this reason, the compensation amount can also be grasped by current and torque.

  Also, the appropriate norm varies in magnitude depending on the magnitude of the electrical angular velocity and the current. For this reason, it is considered that the magnitude of the value that can be taken when the magnetic flux abnormality does not occur as the correction amount of the basic norm changes according to the electrical angular velocity and the current. For this reason, the predetermined range can be set more appropriately by variably setting the predetermined range according to these.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the phase setting means uses the torque of the rotating machine as a feedback control amount.

1 is a system configuration diagram according to a first embodiment. FIG. The flowchart which shows the procedure of the diagnostic process concerning the embodiment. The flowchart which shows the procedure of the diagnostic process concerning 2nd Embodiment.

<First Embodiment>
Hereinafter, a first embodiment in which a control device for a rotating machine according to the present invention is applied to a control device for a rotating machine as an in-vehicle main machine will be described with reference to the drawings.

  FIG. 1 shows the overall configuration of a motor generator control system according to this embodiment. The motor generator 10 as an in-vehicle main machine is a three-phase permanent magnet synchronous motor. The motor generator 10 is a rotating machine (saliency pole machine) having saliency. Specifically, the motor generator 10 is an embedded magnet synchronous motor (IPMSM).

  The motor generator 10 is connected to the high voltage battery 12 via the inverter IV. The inverter IV includes three sets of series connection bodies of switching elements S * p, S * n (* = u, v, w), and the connection points of these series connection bodies are U, V, Each is connected to the W phase. In the present embodiment, an insulated gate bipolar transistor (IGBT) is used as the switching element S * # (* = u, v, w; # = n, p). In addition, a diode D * # is connected in antiparallel to each of these.

  In this embodiment, the following is provided as detection means for detecting the state of the motor generator 10 and the inverter IV. First, a rotation angle sensor 14 for detecting the rotation angle (electrical angle θ) of the motor generator 10 is provided. Further, a current sensor 16 that detects currents iu, iv, and iw flowing through the phases of the motor generator 10 is provided. Further, a voltage sensor 18 for detecting an input voltage (power supply voltage VDC) of the inverter IV is provided.

  The detection values of the various sensors are taken into the control device 20 constituting the low voltage system via an interface (not shown). The control device 20 generates and outputs an operation signal for operating the inverter IV based on the detection values of these various sensors. Here, the signal for operating the switching element S * # of the inverter IV is the operation signal g * #.

  The control device 20 operates the inverter IV to control the torque of the motor generator 10 to the required torque Tr. Specifically, the control device 20 performs known current feedback control so as to obtain a command current corresponding to the required torque Tr in a region where the modulation factor is low. In FIG. 1, processing in the region where the modulation factor is high is described among the processing performed by the control device 20. This will be described below.

  The two-phase converter 22 converts the three-phase actual currents iu, iv, and iw detected by the current sensor 16 into a d-axis actual current id and a q-axis actual current iq, which are currents in the rotating coordinate system. On the other hand, the speed calculation unit 24 calculates the electrical angular speed ω based on the electrical angle θ detected by the rotation angle sensor 14. The torque estimator 26 calculates the estimated torque Te of the motor generator 10 using the actual currents id and iq as inputs. This process may be calculated using a map storing the relationship between the actual currents id and iq and the torque, or may be calculated using a model formula. The phase setting unit 28 sets the phase δ as an operation amount for performing feedback control of the estimated torque Te to the required torque Tr based on the difference between the required torque Tr and the estimated torque Te. Specifically, the phase δ is calculated as the sum of the outputs of the proportional controller and the integral controller that receive the difference between the required torque Tr and the estimated torque Te.

  On the other hand, the norm setting unit 30 sets the basic norm Vn1 of the output voltage vector of the inverter IV with the required torque Tr and the electrical angular velocity ω as inputs. This can be performed by providing means for uniquely calculating the basic norm Vn1 from the required torque Tr and the electrical angular velocity ω, such as a map that defines the relationship between the required torque Tr and the electrical angular velocity ω and the basic norm Vn1. it can. In the present embodiment, the basic norm Vn1 is set to a value that can realize the minimum current maximum torque control.

  On the other hand, the command current setting unit 32 sets a command value (command current idr) of the d-axis current for realizing the required torque Tr. Here, the command current idr is a d-axis current value required when the required torque Tr is realized by the minimum current maximum torque control. This is a setting for matching with the setting of the norm setting unit 30.

  The correction amount calculation unit 34 determines the actual current id (output of the low-pass filter 33) based on the difference between the command current idr and the d-axis actual current id output from the two-phase conversion unit 22 processed by the low-pass filter 33. As a manipulated variable for performing feedback control on the command current idr, a correction amount ΔVn of the basic norm Vn1 is calculated. This correction amount ΔVn can be calculated as the sum of the outputs of the proportional controller and the integral controller that receive the difference. Incidentally, the low-pass filter 33 is for removing high-order harmonic components superimposed on the actual current id. This can be done, for example, by setting the cutoff frequency to at least twice the electrical angular frequency.

  The correction unit 36 calculates the final norm Vn by adding the correction amount ΔVn to the basic norm Vn1.

  The operation signal generation unit 38 generates an operation signal g ** based on the phase δ set by the phase setting unit 28, the norm Vn output from the correction unit 36, the power supply voltage VDC, and the electrical angle θ. And output. Specifically, the operation signal generation unit 38 stores an operation signal waveform for one rotation period of the electrical angle as map data for each modulation factor. The operation signal generator 38 calculates the modulation rate based on the power supply voltage VDC and the norm Vn, and selects the corresponding operation signal waveform accordingly. Here, the upper limit of the modulation rate is set to “1.27”, which is the modulation rate during rectangular wave control. For this reason, when the modulation factor becomes the maximum value “1.27”, the switching element S * p on the high potential side is turned on in one rotation cycle of the electrical angle that is the waveform at the time of the rectangular wave control as the operation signal waveform. A waveform (one pulse waveform) is selected in which the period for setting the state and the period for turning on the low potential side switching element S * n are set once. On the other hand, the lower limit of the modulation factor is set to “1.15” which is an upper limit value that can realize three line voltages according to the command voltage set by the current feedback control by the input voltage of the inverter IV. ing. When the operation signal waveform is selected in this way, the operation signal generation unit 38 generates an operation signal by setting the output timing of this waveform based on the phase δ set by the phase setting unit 28.

  By using the operation signal g * #, the torque of the motor generator 10 can be controlled to the required torque Tr by the minimum current maximum torque control. However, when so-called demagnetization occurs in which the magnetic flux of the permanent magnet is reduced, even if the current flowing through the motor generator 10 is controlled to the current required for realizing the minimum current maximum torque control, the motor generator 10 The actual torque becomes smaller than the required torque Tr. When the actual torque decrease is significant, various problems such as a reduction in the efficiency of the motor generator 10 occur.

Therefore, in the present embodiment, attention is paid to the fact that the basic norm Vn1 set by the norm setting unit 30 deviates from a value required for controlling to the required torque Tr by the minimum current maximum torque control due to demagnetization. Then, the presence / absence of an abnormality that reduces the magnetic flux of the permanent magnet of the motor generator 10 is determined, and when it is determined that there is an abnormality, the fact is notified to the outside. Next, the reason why the basic norm Vn1 deviates from the correct value due to demagnetization will be described using the IPMSM voltage equation expressed by the following equations (c1) and (c2). In the following expression, d-axis inductance Ld, q-axis inductance Lq, resistance R, armature flux linkage constant φ, and differential operator p are used.
vd = (R + pLd) id−ωLqiq (c1)
vq = ωLdid + (R + pLq) iq + ωφ (c2)
When the armature interlinkage flux constant φ decreases with respect to that assumed in the norm setting unit 30, the output voltage vector of the inverter IV required for flowing a current for realizing the minimum current / maximum torque control is reduced. Norm changes. Specifically, the required norm is reduced.

  FIG. 2 shows a procedure for demagnetization diagnosis processing focusing on the fact that the basic norm Vn1 deviates from an appropriate value. This process is repeatedly executed, for example, at a predetermined cycle when the control device 20 performs the torque feedback control shown in FIG.

  In this series of processing, first, in step S10, a correction amount ΔVn of the basic norm Vn1 is calculated. In subsequent step S12, a threshold value ΔVth that is a comparison target of the correction amount ΔVn is set. In the present embodiment, the threshold ΔVth is variably set in consideration of the fact that the basic norm Vn1 can deviate from an appropriate value due to factors other than an abnormal decrease in magnetic flux due to the control failure of the motor generator 10 or the like.

  That is, since the d-axis inductance Ld and the q-axis inductance Lq shown in the above (c1) and (c2) change depending on the current flowing through the motor generator 10, the appropriate norm for performing the minimum current maximum torque control is also the motor generator 10 Varies depending on the current flowing through. On the other hand, in the norm setting unit 30 shown in FIG. 1, the basic norm Vn1 assumes fixed values for the d-axis inductance Ld and the q-axis inductance Lq. For this reason, even if the motor generator 10 is normal, the correction amount ΔVn is calculated so as to compensate for the deviation of the d-axis inductance Ld and the q-axis inductance Lq from the assumed fixed values. Therefore, if the threshold value ΔVth is variably set according to the fluctuation amount of the d-axis inductance Ld and the q-axis inductance Lq, the recognition that the correction amount for compensating the fluctuation amount of the inductance is a normal correction amount. The presence / absence of demagnetization can be determined, and as a result, the accuracy of determining the presence / absence of demagnetization can be improved.

  Further, since the resistance R shown in the above (c1) and (c2) changes according to the temperature of the motor generator 10, the norm suitable for performing the minimum current maximum torque control also changes depending on the temperature of the motor generator 10. On the other hand, in the norm setting unit 30 shown in FIG. 1, the basic norm Vn1 is uniquely determined by the required torque Tr and the electrical angular velocity ω. Therefore, the basic norm Vn1 is a fixed value for the resistance R. Is assumed. For this reason, even if the motor generator 10 is normal, the correction amount ΔVn is calculated so as to compensate for the deviation of the resistance R from the assumed fixed value. For this reason, if the threshold value ΔVth is variably set according to the variation amount of the resistance R, the presence or absence of demagnetization is determined based on the recognition that the correction amount for compensating the variation amount of the resistance is a normal correction amount. It is possible to improve the accuracy of determining the presence or absence of demagnetization.

  Furthermore, since the armature flux linkage constant φ changes according to the temperature of the permanent magnet, the norm appropriate for performing the minimum current maximum torque control also changes with the temperature of the permanent magnet. On the other hand, in the norm setting unit 30 shown in FIG. 1, the basic norm Vn1 is uniquely determined by the required torque Tr and the electrical angular velocity ω. Therefore, the basic norm Vn1 is the armature flux linkage constant. A fixed value is assumed for φ. For this reason, even if the motor generator 10 is normal, the correction amount ΔVn is calculated so as to compensate for the deviation of the armature flux linkage constant φ from the assumed fixed value. For this reason, if the threshold value ΔVth is variably set according to the temperature, the presence or absence of demagnetization can be determined based on the recognition that the correction amount for compensating for the fluctuation amount due to the temperature of the magnetic flux is a normal correction amount. It is possible to improve the accuracy of determining the presence or absence of demagnetization.

  The basic norm Vn1 required for controlling the required torque Tr increases as the currents id, iq and the electrical angular velocity ω increase, as can be seen from the equations (c1) and (c2). For this reason, when the basic norm Vn1 includes a design error or the like, it is considered that the absolute value of the correction amount ΔVn for correcting this error increases as the current id, iq or the electrical angular velocity ω increases. For this reason, if the threshold value ΔVth is variably set according to the size of the basic norm Vn1, the accuracy of determining the presence or absence of demagnetization can be improved.

  Here, as a method of variably setting the threshold value ΔVth in accordance with changes in the d-axis inductance Ld and the q-axis inductance Lq, an approach that includes an estimator that directly estimates this and inputs an estimated value is conceivable. . Alternatively, the change in the d-axis inductance Ld and the q-axis inductance Lq may be compensated by variably setting the threshold value ΔVth according to the actual currents id, iq and the command currents idr, iqr. Further, for example, since the current for realizing the minimum current / maximum torque control is determined from the required torque Tr, a change in the d-axis inductance Ld and the q-axis inductance Lq can be made by variably setting the threshold value ΔVth according to the required torque Tr. May be compensated. However, estimated torque or the like may be used instead of the required torque Tr.

  In step S12, the threshold ΔVth is varied using at least one of the d-axis inductance Ld, the q-axis inductance Lq, the temperature of the permanent magnet, the d-axis current, the q-axis current, the torque, the electrical angular velocity ω, and the resistance R. Set. In addition, about the temperature of a permanent magnet, when the means to detect this directly is not provided, you may use the detected value and estimated value of the temperature of the member which have a correlation with the temperature of a permanent magnet, such as the temperature of a stator.

  The threshold value ΔVth (<0) may be calculated by subtracting a predetermined margin amount from the difference between the basic norm Vn1 and the norm calculated by considering the above parameters. Alternatively, the difference between the basic norm Vn1 and the norm when demagnetization calculated by considering the above parameters may be used. The norm in which the above parameters are taken into account may be calculated based on the above formulas (c1) and (c2), but may be calculated based on the norm formula described in Patent Document 1, for example.

  In the subsequent step S14, it is determined whether or not the correction amount ΔVn is equal to or less than the threshold value ΔVth (<0). If an affirmative determination is made in step S14, a time counting operation is performed in step S16 to measure the duration of the period for which an affirmative determination is made in step S14. In subsequent step S18, it is determined whether or not the duration of the state in which an affirmative determination is made in step S14 has reached a predetermined time. This process is for determining whether or not demagnetization has occurred. If a negative determination is made in step S18, the process returns to step S14. On the other hand, if an affirmative determination is made in step S18, it is determined in step S20 that demagnetization has occurred, and the fact is notified to the outside. Here, the user is notified of this by turning on a warning lamp on the instrument panel.

  On the other hand, when a negative determination is made in step S14, the process proceeds to step S22 to initialize the timing operation.

  In addition, when the process of said step S20, 22 is completed, this series of processes are once complete | finished.

  According to the embodiment described in detail above, the following effects can be obtained.

  (1) Based on the fact that the correction amount ΔVn of the basic norm Vn1 is equal to or less than the threshold value ΔVth, it was diagnosed that an abnormality occurred in the magnetic flux of the permanent magnet of the motor generator 10. Thereby, the presence or absence of demagnetization can be diagnosed suitably.

  (2) By variably setting the threshold value ΔVth, it is possible to improve the diagnostic accuracy of the presence or absence of demagnetization.

(3) It was diagnosed that demagnetization occurred when the state where the correction amount ΔVn was abnormal continued. As a result, when the absolute value of the correction amount ΔVn increases due to the transient operation state of the motor generator 10, it can be avoided that this is erroneously diagnosed as demagnetization has occurred.
<Second Embodiment>
Hereinafter, the second embodiment will be described with reference to the drawings with a focus on differences from the first embodiment.

  FIG. 3 shows a procedure of demagnetization diagnosis processing according to the present embodiment. This process is repeatedly executed, for example, at a predetermined cycle when the control device 20 performs the torque feedback control shown in FIG.

  In this series of processing, after calculating the correction amount ΔVn in step S30, the threshold value Ith is variably set in step S32 as in step S12 shown in FIG. In the subsequent step S34, it is determined whether or not the fluctuation amount ΔI (difference between the maximum value and the minimum value in the predetermined time) of the output I of the integration controller of the correction amount calculation unit 34 is equal to or less than the threshold value ΔIth. This process is for determining whether or not the correction amount ΔVn is appropriate as a quantification of the steady deviation between the basic norm Vn1 and the appropriate norm. This is because the output is considered to be a value that compensates for a steady divergence if the output of the integral controller converges.

  If an affirmative determination is made in step S34, it is determined in step S36 whether the output I of the integral controller is equal to or less than a threshold value Ith (<0). This process is for determining whether or not demagnetization has occurred. If an affirmative determination is made in step S36, it is determined in step S38 that demagnetization has occurred, and the fact is notified to the outside.

When the process of step S38 is completed or when a negative determination is made in steps S34 and S36, this series of processes is temporarily terminated.
<Other embodiments>
Each of the above embodiments may be modified as follows.

"About diagnostic tools"
The diagnostic means is not limited to variably setting the threshold value, but may be a fixed value. However, in this case, it is desirable to provide a larger margin than in the above embodiments in order to avoid a misdiagnosis indicating an abnormality.

“About the types of abnormalities to be diagnosed”
The abnormality to be diagnosed is not limited to demagnetization, and may be an abnormality in which the magnetic flux of the permanent magnet is excessively larger than that assumed by the control device 20, for example. This can be diagnosed based on the fact that the correction amount ΔVn is a correction amount that increases the basic norm Vn1. Incidentally, in this case, a rotational speed limit may be provided so that the induced voltage does not become excessively large.

About correction means
The correction means is not limited to a correction amount that is an operation amount for feedback control of the d-axis current. For example, any one of an operation amount for feedback control of the q-axis current, an operation amount for feedback control of the amplitude of the current, and an operation amount for feedback control of the phase of the current is used as the correction amount. Also good. Further, for example, the sum of two or more of these four operation amounts may be used as the correction amount.

  Furthermore, the feedback controller is not limited to a proportional integral controller, and may be, for example, a proportional integral derivative controller, an integral controller, a double integral controller, or the like.

"Phase setting method"
The phase setting means is not limited to setting the phase as the operation amount of the torque feedback control, but may be one that sets the phase as the operation amount of the q-axis current feedback control. Further, the phase is not limited to setting the operation amount as either one of the torque feedback control and the q-axis current feedback control, and the phase may be set as both operation amounts.

  Further, the phase may be set as an operation amount for feedback control of the d-axis current. In this case, the correction means calculates the correction amount as the operation amount for feedback control of the q-axis current, calculates the correction amount as the operation amount for feedback control of the current amplitude, and further It is desirable to calculate a correction amount as an operation amount for feedback control of the phase.

  Further, the feedback controller is not limited to a proportional integral controller, and may be a proportional integral derivative controller, an integral controller, or the like.

"Basic norm setting method"
The basic norm setting means is not limited to one using a map that defines the relationship between the required torque Tr, the electrical angular velocity ω, and the basic norm Vn1, but for example, the basic norm setting means is based on the voltage equations of the above equations (c1) and (c2). Norm Vn1 may be calculated. However, in this case, a means for outputting the command currents idr and iqr with the required torque Tr as an input is provided, and the output command currents idr and iqr are set as the current values of the voltage equation.

  The basic norm setting means is not limited to one that uniquely determines the basic norm Vn1 by the required torque and the rotational speed. For example, the basic norm Vn1 may be uniquely determined by the required torque, the rotation speed, and the temperature of the motor generator 10. As a result, each parameter (q-axis inductance Lq, d-axis inductance Ld, resistance R, armature flux linkage constant φ) that determines the characteristics of the motor generator 10 varies depending on the temperature. An appropriate norm can be set. In this case, even if the threshold value for diagnosis is not variably set according to temperature, it is considered that the same effect as that when the threshold value is variably set according to temperature can be obtained.

  Further, the parameter relating to the torque is not limited to the required torque. For example, actual currents id and iq may be used.

"About rotating machines"
As a synchronous machine provided with a permanent magnet, not only IPMSM but a surface magnet synchronous machine (SPMSM) etc. may be sufficient, for example. Moreover, as a rotary machine, it is not restricted to what becomes a vehicle-mounted main machine. For example, a rotating machine mounted on a power steering may be used.

"others"
In the first embodiment, when the correction amount ΔVn is equal to or less than the threshold value ΔVth continues for a predetermined time, a steady divergence due to demagnetization occurs between the basic norm Vn1 and an appropriate norm. However, the present invention is not limited to this. For example, as in the second embodiment, it may be added as a condition for making the above determination that the fluctuation amount ΔI of the output I of the integral controller is equal to or less than the threshold value ΔIth.

  -The AC voltage application means is not limited to an inverter. For example, it may be described in Japanese Patent Application No. 2008-030825.

  DESCRIPTION OF SYMBOLS 10 ... Motor generator, 12 ... High voltage battery, 20 ... Control apparatus (one Embodiment of the control apparatus of a rotary machine), 28 ... Phase setting part, 30 ... Norm setting part, 34 ... Correction amount calculation part, 38 ... Operation signal Generation unit, IV: inverter.

Claims (4)

In a control device for a rotating machine that controls a control amount of the rotating machine by operating an AC voltage applying unit that applies an AC voltage to the rotating machine including a permanent magnet.
Norm setting means for setting a basic norm of an output voltage vector of the AC voltage applying means as an open-loop operation amount for controlling the torque of the rotating machine to a required torque;
The phase of the output voltage of the AC voltage application means as an operation amount for feedback control of at least one of the q-axis current flowing through the rotating machine and the torque of the rotating machine and the d-axis current flowing through the rotating machine Phase setting means for setting
A correction amount calculating means for calculating a correction amount of the basic norm as an operation amount for performing feedback control of a current flowing through the rotating machine, wherein the feedback control means uses a parameter different from the phase setting means as a control amount; ,
Operating means for operating the AC voltage applying means based on the basic norm corrected by the correction amount and the set phase;
A control device for a rotating machine, comprising: diagnostic means for diagnosing that an abnormality has occurred in the magnetic flux of the permanent magnet based on the correction amount being out of a predetermined range.   2. The rotating machine according to claim 1, wherein the diagnosis unit diagnoses that an abnormality has occurred in which the magnetic flux of the permanent magnet is reduced based on the correction amount reducing and correcting the basic norm. Control device. The norm setting means uniquely sets the basic norm according to the required torque of the rotating machine and the electrical angular velocity of the rotating machine,
The predetermined range is based on at least one of the temperature of the permanent magnet, the current flowing through the rotating machine, the torque of the rotating machine, the inductance of the rotating machine, the electrical angular velocity of the rotating machine, and the resistance of the rotating machine. 3. The control device for a rotating machine according to claim 1, wherein the control device is variably set.   The said phase setting means uses the torque of the said rotary machine as a feedback control amount, The control apparatus of the rotary machine of any one of Claims 1-3 characterized by the above-mentioned.

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