DE102017131115A1 - DIAGNOSTIC TOOL - Google Patents

Abstract

A field side threshold and an armature side threshold are set as a combination of a field current and an armature current in which a generated torque of a rotary electric machine is equal to or less than a torque threshold. A diagnostic apparatus diagnoses an abnormality with respect to a field supply circuit based on a field current in a state where a drive is performed such that the field current is larger than the field side threshold and an armature current is equal to or smaller than the armature side threshold. The diagnostic apparatus diagnoses an abnormality with respect to a armature feed circuit based on armature current in a state where the drive is performed such that the field current is equal to or smaller than the field side threshold and the armature current is greater than the armature side threshold.

Description

BACKGROUND

[Technical area]

The present disclosure relates to a diagnostic apparatus used in a system having a rotary electric machine and a diagnostic method.

[State of the art]

As for example from the WO2013 / 171843 As is apparent, a system is known which comprises a armature feed circuit and a field feed circuit. The armature feed circuit is driven to supply an armature current to an armature winding of a rotating electrical machine. The field supply circuit is driven to supply a field current to a field winding of the rotary electric machine.

In order to improve the reliability of the operation of the system described above, a technique is required which enables a diagnosis of a presence of abnormality with respect to the armature feed circuit and / or the field supply circuit configuring the system.

SUMMARY

It is thus desirable to provide a diagnostic apparatus capable of diagnosing whether an abnormality has occurred with respect to a armature feeding circuit and / or a field feeding circuit or not.

A first exemplary embodiment provides a diagnostic device for a system that includes a rotary electric machine, a armature feed circuit, and a field feed circuit. The rotary electric machine has an armature winding and a field winding. The armature feed circuit is driven to supply armature current to the armature winding. The field feed control is driven to supply a field current to the field winding. In the diagnostic apparatus, a field-side threshold which is a threshold value for the field current and an armature-side threshold which is a threshold value for the armature current are set as a combination of the field current and the armature current at which a generated torque of the rotary electric machine is the same or less than a torque threshold.

The diagnostic device has a drive unit and a diagnostic unit. The drive unit drives the armature feed circuit and / or the field supply circuit. The diagnostic unit performs a field-side diagnostic process and / or an anchor-side diagnostic process. In the field side diagnosis process, the diagnosis unit diagnoses an abnormality with respect to the field supply circuit based on the field current in a state where the drive unit drives such that the field current is greater than the field side threshold and the armature current is equal to or less than the armature side threshold is. In the armature-side diagnosis process, the diagnosis unit diagnoses an armature current-based abnormality with respect to the armature current in a state where the drive unit drives such that the field current is equal to or smaller than the field-side threshold, and the armature current is larger than the armature-side Threshold is.

According to the first exemplary embodiment, the diagnostic unit performs the field-side diagnostic process and / or the armature-side diagnostic process.

The field-side diagnostic process is described below. In this diagnostic process, an abnormality with respect to the field supply circuit is diagnosed based on the field current. Therefore, it is required that a diagnostic field current is supplied to the field winding. Here, when, for example, the field current is supplied to the field winding in a state in which the armature current flows to the armature winding, the rotary electric machine can generate torque. When the generated torque of the rotary electric machine is large, a problem may occur such as inconvenience to a user using the system.

Therefore, according to the first exemplary embodiment, the field-side threshold, which is a threshold value for the field current, and the armature-side threshold, which is a threshold value for the armature current, are set as a combination of the field current and the armature current in which the generated torque of the rotating electrical Machine is equal to or less than the torque threshold. The diagnosis unit performs, as the field-side diagnosis process, a process of diagnosing an abnormality with respect to the field supply circuit in a state where the drive unit drives such that the field current is greater than the field side threshold and the armature current is equal to or less than as the armature side threshold.

As a result of the first exemplary embodiment, even when the diagnosis field current is supplied, the generated torque of the rotary electric machine can be set to be equal to or smaller than the torque threshold, since the armature current is equal to or smaller than the armature side threshold. Consequently, the occurrence of a problem such as inconvenience to a user using the system can be suppressed while an abnormality diagnosis with respect to the field feeding circuit is suppressed.

The following describes the armature-side diagnostic process. In this diagnostic process, an anomaly with respect to the armature feed circuit is diagnosed based on the armature current. Therefore, it is necessary that an armature current for the diagnosis of the armature winding is supplied. Here, when, for example, the armature current is supplied to the armature winding in a state in which the field current flows to the field winding, the rotary electric machine can generate torque. When the generated torque of the rotary electric machine is large, there may occur a problem such as inconvenience to a user using the system.

Therefore, according to the first exemplary embodiment, as the armature-side diagnosis process, the diagnosis unit performs a process of diagnosing abnormality with respect to the armature energizing circuit based on the armature current, in a state where the drive unit drives such that the field current is the same or less than the field side threshold and the armature current is greater than the armature side threshold. As a result of the first exemplary embodiment, even when the armature current is supplied for diagnosis, the generated torque of the rotary electric machine can be set to be equal to or smaller than the torque threshold, since the field current is equal to or smaller than the field side threshold is. Consequently, the occurrence of a problem such as the user experiencing inconvenience can be suppressed during an abnormality diagnosis with respect to the armature feed circuit.

According to a second exemplary embodiment, the diagnostic unit may perform the armature-side diagnostic process upon completion of the field-side diagnostic process. The drive unit may drive the armature feed circuit and the field feed circuit such that upon completion of the field diagnostic process, the armature current increases toward the armature side threshold at a time when the field current decreases to a predetermined value greater than zero and equal to or is less than the field-side threshold.

According to the second exemplary embodiment, the diagnosis unit performs the armature-side diagnosis process after completion of the field-side diagnosis process. To perform the armature-side diagnostic process, it is necessary that the armature current, which is equal to or smaller than the armature-side threshold, be increased to become larger than the armature-side threshold. At this time, according to the second exemplary embodiment, after completion of the field side diagnosis process, the drive unit increases the armature current to the armature side threshold toward the time when the field current has decreased to the predetermined value greater than zero and equal to or smaller than the field side threshold is. Therefore, the timing at which the armature current becomes larger than the armature side threshold can be made earlier than in a case where the armature current is increased to the armature side threshold toward the time when the field current has decreased to zero. As a result, the timing at which the armature-side diagnosis process is started can be made earlier. Furthermore, a time required to complete the armature-side diagnostic process after starting the field-side diagnostic process can be shortened.

According to a third exemplary embodiment, the diagnostic unit may perform the field-side diagnostic process upon completion of the armature-side diagnostic process. The drive unit may drive the armature feed circuit and the field feed circuit such that upon completion of the armature side diagnostic process, the field current to the field side threshold at one time is increased, at which the armature current has decreased to a predetermined value which is greater than zero and is equal to or smaller than the field-side threshold value.

According to the third exemplary embodiment, the diagnosis unit performs the field-side diagnosis process after completion of the armature-side diagnosis process. In order to perform the field-side diagnosis process, it is required that the field current which is equal to or smaller than the field side threshold value is increased to become larger than the field side threshold value. At this time, according to the third exemplary embodiment, upon completion of the armature-side diagnostic process, the drive unit increases the field current to the field side threshold toward the time the armature current has decreased to the predetermined value greater than zero and equal to or less than the armature side threshold is.

Therefore, the timing at which the field current becomes larger than the field side threshold value can be made earlier than in a case where the field current is increased to the field side threshold value at the time when the armature current has decreased to zero. As a result, the timing at which the field-side diagnosis process is started can be made earlier. Furthermore, a time required to complete the field-side diagnosis process after the start of the armature-side diagnosis process can be shortened.

According to a fourth exemplary embodiment, the diagnostic unit may perform the armature-side diagnostic process upon completion of the field-side diagnostic process. The drive unit may drive the armature feed circuit and the field feed circuit such that the armature current is maintained at zero when the field side diagnostic process is performed, and the armature current increases toward the armature side threshold upon completion of the field diagnostic process, at a time when the field current is increased Zero reduced.

According to the fourth exemplary embodiment, the diagnosis unit performs the armature-side diagnosis process after completing the field-side diagnosis process. To perform the armature-side diagnostic process, it is necessary that the armature current, which is equal to or smaller than the armature-side threshold, be increased to become larger than the armature-side threshold. At this time, according to the fourth exemplary embodiment, the drive unit maintains the armature current at zero when the field-side diagnosis process is performed. The drive unit, upon completion of the field side diagnostic process, increases the armature current to the armature side threshold toward the time the field current decreases to zero.

As a result of the fourth exemplary embodiment, one of the armature current and the field current is zero during a period from the start of the field-side diagnostic process to the completion of the armature-side diagnostic process. Therefore, the generated torque of the rotary electric machine can be set to zero during the period from the start of the field-side diagnostic process to the completion of the armature-side diagnostic process. As a result, occurrence of a problem such as inconvenience to the user using the system can be advantageously suppressed.

According to a fifth exemplary embodiment, the diagnostic unit may perform the field-side diagnostic process upon completion of the armature-side diagnostic process. The drive unit may drive the armature feed circuit and the field feed circuit such that the field current is maintained at zero when the armature-side diagnostic process is performed and the field current increases to the field side threshold after completion of the armor-side diagnostic process at a time when the armature current reduced to zero.

According to the fifth exemplary embodiment, the diagnosis unit may perform the field-side diagnosis process upon completion of the armature-side diagnosis process. In order to perform the field-side diagnosis process, it is required that the field current which is equal to or smaller than the field side threshold value is increased to become larger than the field side threshold value. At this time, according to the fifth exemplary embodiment, the drive unit maintains the field current at zero when the armature-side diagnosis process is performed. The drive unit, upon completion of the armature-side diagnostic process, increases the field current to the field-side threshold toward the time the armature current decreases to zero.

As a result of the fifth exemplary embodiment, one of the field current and the armature current is zero during a period from the start of the armature-side diagnostic process to the completion of the field-side diagnostic process. Therefore, the generated torque of the rotary electric machine can be set to zero during the period from the start of the armature-side diagnostic process to the completion of the field-side diagnostic process. As a result, the occurrence of a problem such as inconvenience to the user using the system can be advantageously suppressed.

According to the second to fifth exemplary embodiments, a q-axis current of the rotary electric machine may be used as the armature current in the diagnosis unit and the drive unit, as in a sixth exemplary embodiment.

According to a seventh exemplary embodiment, the drive unit may drive the armature feed circuit such that a d-axis current or the q-axis current of the rotary electric machine is zero when the armature current is supplied.

As a result of the seventh exemplary embodiment, a reluctance torque generated by the rotary electric machine can be set to zero. Therefore, the generated torque of the rotary electric machine during the diagnosis can be suppressed. The occurrence of a problem such as inconvenience to the user using the system can be advantageously suppressed.

According to an eighth exemplary embodiment, the drive unit may drive the field supply circuit to supply a field current for demagnetizing a field portion of the rotary electric machine that is magnetized when the armature-side diagnosis process is performed.

Should the field winding be magnetized when the armature-side diagnostic process is performed, the generated torque of the rotary electric machine may become greater than the torque threshold regardless of the field feed circuit being driven such that the field current is equal to or less than the field side threshold. Therefore, according to the eighth exemplary embodiment, the drive unit drives the field feed circuit so as to supply a field current for demagnetizing the field portion of the rotary electric machine when the armature-side diagnosis process is performed. As a result, when the armature-side diagnosis process is performed, the generated torque of the rotary electric machine can be prevented from becoming larger than the torque threshold.

A ninth exemplary embodiment is applied to a vehicle. The vehicle includes an engine as a power source for driving the vehicle. According to the ninth exemplary embodiment, a rotor of the rotary electric machine is connected to an output shaft of the engine such that the rotor and the output shaft are always capable of power transmission.

According to the ninth exemplary embodiment, the rotor of the rotary electric machine is connected to the output shaft of the engine such that the rotor and the output shaft are always capable of power transmission. Therefore, for example, when the rotary electric machine generates torque as a result of supplying the field current when the field-side diagnosis process is performed, a problem such as inconvenience to the user using the system tends to occur. In addition, for example, when the rotary electric machine generates torque as a result of supplying the armature current when performing the armature-side diagnosis process, a problem such as inconvenience to the user using the system tends to occur. In this way, according to the ninth embodiment, according to which the above-described problem tends to occur, the provision of the diagnosis unit and the drive unit capable of adjusting the generated torque of the rotary electric machine during the diagnosis so as to be the same as or less than the torque threshold is very advantageous.

For example, according to a tenth example embodiment, the torque threshold may be specifically set to a value at which the user of the vehicle inputs vibrations in the vehicle associated with the torque when the rotary electric machine generates torque while the vehicle is in a stopped state. does not physically perceive.

list of figures

• 1 eine Darstellung einer Gesamtkonfiguration eines fahrzeugeigenen Systems gemäß einem ersten Ausführungsbeispiel;
• 2 eine Darstellung eines Antriebszustands einer Feldspeisungsschaltung während einer Erregung;
• 3 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess;
• 4 eine Darstellung eines Beispiels für einen Antriebszustand einer Ankerspeisungsschaltung während eines ankerseitigen Diagnoseprozesses;
• 5 ein Zeitverlaufsdiagramm der Schritte in dem Anomalitätsdiagnoseprozess;
• 6 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess gemäß einem zweiten Ausführungsbeispiel;
• 7 ein Zeitverlaufsdiagramm der Schritte in dem Anomalitätsdiagnoseprozess;
• 8 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess gemäß einem dritten Ausführungsbeispiel;
• 9 ein Zeitverlaufsdiagramm der Schritte in dem Anomalitätsdiagnoseprozess;
• 10 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess gemäß einem vierten Ausführungsbeispiel;
• 11 ein Zeitverlaufsdiagramm der Schritte in dem Anomalitätsdiagnoseprozess;
• 12 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess gemäß einem fünften Ausführungsbeispiel;
• 13 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess gemäß einem sechsten Ausführungsbeispiel;
• 14 ein Flussdiagramm von Schritten in einem Anomalitätsdiagnoseprozess gemäß einem siebten Ausführungsbeispiel; und
• 15 eine Darstellung eines Antriebszustands der Feldspeisungsschaltung während einer Entmagnetisierung.

In the accompanying drawings show:

• 1 a representation of an overall configuration of an in-vehicle system according to a first embodiment;
• 2 a representation of a drive state of a field supply circuit during an excitation;
• 3 a flowchart of steps in an abnormality diagnosis process;
• 4 FIG. 10 is an illustration of an example of a drive state of a armature feed circuit during an armature-side diagnostic process; FIG.
• 5 a timing chart of the steps in the abnormality diagnosis process;
• 6 a flowchart of steps in an abnormality diagnosis process according to a second embodiment;
• 7 a timing chart of the steps in the abnormality diagnosis process;
• 8th a flowchart of steps in an abnormality diagnosis process according to a third embodiment;
• 9 a timing chart of the steps in the abnormality diagnosis process;
• 10 a flowchart of steps in an abnormality diagnosis process according to a fourth embodiment;
• 11 a timing chart of the steps in the abnormality diagnosis process;
• 12 a flowchart of steps in an abnormality diagnosis process according to a fifth embodiment;
• 13 a flowchart of steps in an abnormality diagnosis process according to a sixth embodiment;
• 14 FIG. 10 is a flowchart of steps in an abnormality diagnosis process according to a seventh embodiment; FIG. and
• 15 an illustration of a drive state of the field supply circuit during demagnetization.

DESCRIPTION OF THE EMBODIMENTS

(First embodiment)

A diagnosis apparatus according to a first embodiment of the present disclosure will be described below with reference to the drawings. According to the first embodiment, the diagnostic apparatus is applied to a vehicle in which an engine is mounted as a power source for driving the vehicle.

As it is in 1 is shown, the vehicle has an engine 10 , a starter 11 and a battery 20 on. The engine 10 serves as an on-board main engine. The battery 20 serves as a DC power supply. The engine 10 has a fuel injection valve and the like. The engine 10 generates power as a result of combustion of fuel such as gasoline or diesel injected from the fuel injection valve. The power generated is from an output shaft 10a the engine 10 output.

The ignition 11 is driven by supply of electric power from the battery 10. The ignition 11 thereby acts on the output shaft 10a with an initial turn to the engine 10 to start. For example, the starter 11 configured by a DC motor.

The vehicle has a rotating electrical machine 30 powered by alternating current. According to the present embodiment, a field winding synchronous machine is used as the rotary electric machine 30 used. In addition, according to the present embodiment, a salient pole machine becomes the rotary electric machine 30 used. Furthermore, according to the present embodiment, an integrated starter generator (Integrated Starter Generator, ISG) as the rotating electrical machine 30 used. The ISG is a power generator added to the functions of an electric motor.

The rotating electric machine 30 has a rotor 31 on. The rotor 31 has a field winding 32 and a permanent magnet 33 on. A first pulley 40 is with a rotary shaft 31a of the rotor 31 connected. A second pulley 41 is with the output shaft 10a the engine 10 connected. The first pulley 40 and the second pulley 41 are always through a belt 42 connected. When the rotating electric machine 30 is operated as a power generator, the rotor rotates 31 as a result of a rotational power coming out of the output shaft 10a is supplied. The rotating electric machine 30 thereby generates electrical power. The battery 20 gets through by the rotating electric machine 30 generated electric power charged. In contrast, when the rotating electric machine 30 is operated as an electric motor, the output shaft rotates 10a in connection with the rotation of the rotor 31 , and the output shaft 10a is applied with a rotational force. As a result, for example, the rotary electric machine 30 support the driving of the vehicle.

A drive wheel 43 is mechanical with the output shaft 10a with a gear or the like (not shown) connected therebetween.

The rotating electric machine 30 has a stator 34 on. The stator 34 has U, V and W phase windings 35U, 35V and 35W arranged to be shifted from each other by an electrical angle of 120 °.

The ISG has a power circuit unit 50 on. The power circuit unit 50 has a armature feed circuit 51 and a field feed circuit 52 on.

According to the present embodiment, the armature feed circuit 51 is a three-phase inverter. The armature feed circuit 51 has series circuit bodies composed of U, V and W phase upper branch switches SUp, SVp and SWp, and U, V and W phase sub-branch switches SUn, SVn and SWn. First ends of the U-, V- and W-phase windings 35U, 35V and 35W are respectively connected to connection points PU, PV and PW between the U, V and W-phase upper branch switches SUp, SVp and SWp and the U-phase windings. , V and W-phase sub-branch switches SUn, SVn and SWn. Second ends of the U, V and W phase windings 35U, 35V and 35W are connected by a neutral point.

That is, according to the present embodiment, the U, V, and W phase windings 35U, 35V, and 35W are connected by a star connection. According to the present embodiment, N-channel metal oxide semiconductor field effect transistors (MOSFETs) are used for the branch switches SUp to SWn. In addition, a parasitic diode (not shown) is connected in parallel to each of the branch switches SUp to SWn.

A positive connection of the battery 20 is connected to a drain which is a high-potential-side terminal of each of the U, V and W phase upper branch switches SUp, SVp and SWp. A negative terminal of the battery 20 is connected to a source which is a low-potential-side terminal of each of the U, V, and W-phase sub-branch switches SUn, SVn, and SWn. The power supply 50 has a capacitor 53 on, which is parallel to the battery 20 is switched.

The field supply circuit 52 includes a series circuit body composed of a first upper branch switch SH1 and a first sub branch switch SL1, and a series circuit body composed of a second upper branch switch SH2 and a second sub branch switch SL2. A first end of the field winding 32 is connected to a connection point between the first upper branch switch SH1 and the first sub branch switch SL1 with a brush (not shown) therebetween. A second end of the field winding 32 is connected to a connection point between the second upper branch switch SH2 and the second sub branch switch SL2 with a brush (not shown) therebetween. According to the present embodiment, N-channel MOSFETs are used as the branch switches SH1, SL1, SH2 and SL2. In addition, a parasitic diode is connected in parallel with each of the branch switches SH1, SL1, SH2 and SL2.

The positive connection of the battery 20 is connected to a drain which is a high potential side terminal of each of the first and second upper branch switches SH1 and SH2. The negative connection of the battery 20 is connected to a source which is a low-potential side terminal of each of the first and second sub-branch switches SL1 and SL2.

The ISG has a control device 60 on. The control device 60 has a wake-up device 70 and a processing unit 80 on. The processing unit 80 has a power supply unit 81 , an interface unit 82 , a voltage acquisition unit 83 , an armature current procurement unit 84 , a field current procurement unit 85 , a magnetic field detection unit 86 , a calculation unit 87 , an anchor drive unit 88 , a field drive unit 89 and a diagnostic unit 90 on. According to the present embodiment, the power supply unit performs 81 the configurations in the processing unit 80 except the power supply unit 81 electrical power from the battery 20 to.

The alarm device 70 starts the processing unit 80 when it is determined that a start command for the processing unit 80 is issued. When it is determined that the start command is issued, the alarm device gives 70 a power supply permission signal to the power supply unit 81 out, which is the processing unit 80 configured. On the other hand, when it is determined that the start command is not issued, the alarm device stops 70 the output of the power supply permission signal to the power supply unit 81 ,

When it is determined that the power supply permission signal is not from the alarm device 70 is output, the power supply unit stops 81 the supply of electrical power to the interface unit 82 , the voltage acquisition unit 83 , the armature current acquisition unit 84 , the field current procurement unit 85 , the magnetic field detection unit 86 , the calculation unit 87 , the anchor drive unit 88 , the field drive unit 89 and the diagnostic unit 90 ,

On the other hand, when it is determined that the power supply permission signal is output, the power supply unit performs 81 electrical power of the interface unit 82 , the voltage acquisition unit 83 , the armature current acquisition unit 84 , the field current procurement unit 85 , the magnetic field detection unit 86 , the calculation unit 87 , the anchor drive unit 88, the field drive unit 89 and the diagnostic unit 90 to. As a result, the interface unit starts 82 , the voltage acquisition unit 83 , the armature current acquisition unit 84 , the field current acquisition unit 85 , the magnetic field detection unit 86 , the calculation unit 87 , the anchor drive unit 88, the field drive unit 89 and the diagnostic unit 90 the company.

The interface unit 82 Obtains a drive command from outside the control device 60 is entered. The interface unit 82 then returns the procured drive command to the calculation unit 87 out.

The voltage acquisition unit 83 procures an output voltage of the battery 20 as a power supply voltage VB.

The armature current acquisition unit 84 acquires phase currents flowing to the U, V, and W phase windings 35U, 35V, and 35W. According to the present embodiment, the armature current procurement unit acquires 84 a U-phase current IU based on a voltage drop across a shunt resistor connected to the source side of the U-phase sub-branch switch SUn. The armature current acquisition unit 84 acquires a V-phase current IV based on a voltage drop across a shunt resistor connected to the source side of the V-phase sub-branch switch SVn. The armature current acquisition unit 84 acquires a W-phase current IW based on a voltage drop across a shunt resistor connected to the source side of the W-phase sub-switch SWn.

The field current acquisition unit 85 procures a field current leading to the field winding 32 flows. According to the present embodiment, the field current procurement unit acquires 85 a field current IF1 based on a voltage drop across a shunt resistor connected to the source side of the first sub-branch switch SL1. Alternatively, the field power procurement unit procures 85 a field current IF2 based on a voltage drop across a shunt resistor connected to the source side of the second sub-branch switch SL2.

Values by the voltage acquisition unit 83 , the armature current acquisition unit 84 and the field current procurement unit 85 be procured, are in the calculation unit 87 and the diagnostic unit 90 entered.

According to the present embodiment, a magnetic field rotation angle sensor becomes a magnetic field detection unit 86 used. The magnetic field rotation angle sensor has an integrated Circuit (IC) and a Hall effect sensor, which is provided within the IC. The IC has a flat, rectangular shape. The magnetic field detection unit 86 detects a magnetic flux of the permanent magnet 33 that with the rotor 31 turns in one piece. For example, the permanent magnet 33 a circular disc shape. For example, the permanent magnet 33 at a pointed end of the rotary shaft 31a of the rotor 31 provided separately from and facing the IC. The IC calculates an angle signal of the rotor 31 based on the detected magnetic field and outputs it. That from the magnetic field detection unit 86 output angle signal is in the calculation unit 87 and the diagnostic unit 90 entered.

The calculation unit 87 generates drive signals for the switches that the armature feed circuit 51 and the field feed circuit 52 configure under a condition that the drive command from the interface unit 82 is entered.

First is the armature feed circuit 51 described. The calculation unit 87 procures this from the magnetic field detection unit 86 output angle signal. The calculation unit 87 generates drive signals for turning on and off the switches SUp to SWn which are the armature feed circuit 51 configure to the rotating electric machine 30 to drive on the basis of the acquired angle signal. In particular, when the rotating electric machine generates 30 is operated as an electric motor, the calculation unit 87, the drive signals for switching on and off of the branch switches SUp to SWn to DC power coming out of the battery 20 to convert into AC power and supply the AC power to the U, V and W phase windings 35U, 35V and 35W.

In contrast, when the rotating electric machine 30 is operated as a power generator generates the calculation unit 87 the drive signals for turning on and off the branch switches SUp to SWn to convert AC power output from the U, V and W phase windings 35U, 35V and 35W into DC power, and the DC power of the battery 20 supply. The generated drive signals are in the armature drive unit 88 entered. The anchor drive unit 88 switches the branch switches SUp to SWn on and off based on the input drive signals.

Below is the field feed circuit 52 described. The calculation unit 87 turns off the switches that the field supply circuit 52 configure to energize the field winding 32 in and out. In particular, as it generates in 2 the calculation unit is shown 87 Drive signals for alternately turning on the first upper branch switch SH1 and the first sub branch switch SL1. In addition, the calculation unit generates 87 the drive signals to maintain the second sub-switch SH2 in an off state and the second sub-branch switch SL2 in an on state. The calculation unit 87 sets a duty Duty (= Ton / Tsw) based on a command value of the field current that is the field winding 32 is to be supplied.

The duty Duty is a ratio of a on-time Ton with respect to a single switching cycle Tsw of the first upper branch switch SH1. Duty Duty is set to a larger value as the command value of the field current increases. The by the calculation unit 87 generated drive signals are in the field drive unit 89 entered. The field drive unit 89 On the basis of the drive signals, the first upper branch switch SH1 and the first sub branch switch SH2 alternately turn on and off and maintain the second upper branch switch SH2 in the off state and the second sub branch switch SL2 in the on state.

In this case, according to the first embodiment, the calculation unit corresponds 87 , the anchor drive unit 88 and the field drive unit 89 a "drive unit". In addition, according to the present embodiment, the rotary electric machine 30 , the power supply unit 50 and the control device 60 integrated and form a mechanically and electrically integrated drive unit.

Below is a through the diagnostic unit 90 performed anomaly diagnosis process with reference to 3 described. According to the present embodiment, the diagnosis unit is 90 configured to be able to perform the abnormality diagnosis process even if no drive command from outside the control device 60 is entered.

In this sequence of processes, the diagnostic unit first determines in step S10 90 Whether an execution condition for the abnormality diagnosis process is satisfied or not. According to the present embodiment, the execution condition has a condition that the vehicle is stopped. More specifically, for example, all that is needed is that the execution condition has a condition that the vehicle is stopped after the user issues a command to stop using the vehicle Vehicle has given. At this time, the command to stop the use of the vehicle is input by the user turning off an ignition switch or start switch. A command to use the vehicle is given by the user by turning on the ignition switch or the start switch.

If YES in step S10, the diagnosis unit goes 90 to step S11 via. The diagnostic unit 90 determines whether a phase current Iar generated by the armature current acquisition unit 84 is equal to or less than an anchor-side threshold Iath or not. The diagnostic unit 90 performs this process to determine if the condition is such that supplying the field current to the field winding 32 can be started. The armature side threshold Iath will be described later in detail.

If YES is determined in step S11, the diagnosis unit goes 90 to step S12. The diagnostic unit 90 drives the switches of the field feed circuit 52 so that a field current Ifr, which is obtained by the field current acquisition unit 85, in a state in which the switches of the armature feed circuit 51 are maintained in the off state so that the phase currents IU, IV and IW are zero, increased to a field diagnostic current Ifdg. The field diagnostic current Ifdg is greater than a field-side threshold Ifth. Here, for example, the threshold value IF2 may be used as the field current Ifr based on the voltage drop across the shunt resistor connected to the source side of the second sub-branch switch SL2.

According to the present embodiment, the field-side threshold value Ifth, which is a threshold value for the field current, and the armature-side threshold value Iath, which is a threshold value for the phase current, are set as a combination of the field current and the phase current, at which a generated torque of the rotating electrical machine 30 is a torque threshold TLMT. The following describes a method for setting the thresholds Ifth and Iath.

A generated torque Trq of the rotary electric machine 30 is expressed by an expression (eq1) shown below.

Equation 1

$$Trq=p\left\{M\cdot If+\left(Ld-Lq\right)\cdot Id\right\}\cdot Iq$$

In the above-described expression ( 1 ) p denotes a number of pole pairs. M denotes a mutual inductance. If denotes the field current. Ld and Lq denote d and q axis self-inductance. Id denotes a d-axis current which is a magnetic flux component of the armature current. Iq denotes a q-axis current which is a torque component of the armature current. In addition, a first term on the right side of the expression (eq1) denotes a magnetic flux torque that depends on "If x Iq". A second term on the right indicates a reluctance torque that depends on "Id x Iq". The left side of the expression (eq1) is replaced by the TLMT threshold.

According to the present embodiment, the torque threshold TLMT is set to a value at which the user of the vehicle does not physically perceive vibrations in the vehicle associated with the torque even when the rotary electric machine 30 Torque generated while the vehicle is in a stopped state. In addition, the phase current and the field current derived from the d- and q-axis currents Id and Iq satisfying an expression (eq2) described below are set as the armature-side threshold value Iath and the field-side threshold value Ifth. The armature current-side threshold value Iath and the field-side threshold value Ifth may be stored in advance in a storage unit (such as a memory not shown) included in the control apparatus 60 is provided.

Equation 2

$$TLMT\ge p\left\{M\cdot If+\left(Ld-Lq\right)\cdot Id\right\}\cdot Iq$$

In step S13, the diagnosis unit performs 90 a field-side diagnostic process. In the field-side diagnostic process, the diagnostic unit diagnoses 90 in a state in which the calculation unit 87 is instructed, the armature feed circuit 51 and the field feed circuit 52 such that the field current Ifr is the field diagnostic current Ifdg and the phase currents IU, IV and IW are zero based on the field current Ifr, whether an abnormality with respect to the field supply circuit 52 occurred or not. According to the present embodiment, the abnormality relates to the field feeding circuit 52 an abnormality in the field feeding circuit 52 , an interruption abnormality in an electrical path that the field supply circuit 52 and the field winding 32 connect, an anomaly in the field propulsion unit 59 , an abnormality with respect to the generation of drive signals for the switches SH1 to SL2 of the field supply circuit 82 through the calculation unit 87 , an abnormality in a signal transmission path from the field drive unit 89 to the field supply circuit 52 and an abnormality in a signal transmission path from the calculation unit 87 to the field drive unit 89 on. The abnormality in the field feeding circuit 52 also has an abnormality such as an open failure in the switches SH1 to SL2 which is the field supply circuit 52 configure.

For example, when an interrupt occurs in the electrical path that the field supply circuit 52 and the field winding 32 connects, the field current does not flow to the field winding 32 , Therefore, in step S13, the diagnosis unit determines 90 in that the field current Ifr is zero, and determines that there is an abnormality with respect to the field supply circuit 52 occured. In addition, for example, when it is determined that the field current Ifr deviates from the command value of the field current corresponding to the duty Duty that has been set, the diagnosis unit determines 90 that an abnormality with respect to the field feeding circuit 52 occured.

If it is determined in step S13 that there is an abnormality with respect to the field feeding circuit 52 has occurred, the diagnostic unit 90 a process for notifying the abnormality outside the control unit 30 carry out.

In the subsequent step S14, the diagnosis unit determines 90 whether the field-side diagnostic process is completed or not. If it is determined in step S14 that the field-side diagnosis process is not completed, the diagnosis unit returns 90 back to step S13. On the other hand, when it is determined in step S14 that the field-side diagnosis process is completed, the diagnosis unit starts 90 the drive of the field supply circuit 52 such that the field current Ifr decreases from the field diagnostic current Ifdg to zero, and proceeds to step S15. In step S15, the diagnosis unit determines 90 Whether the field current Ifr is equal to or less than the field side threshold Ifth or not. The diagnostic unit 90 performs this process to determine if the condition is such that supplying the phase currents to the phase windings 35U to 35W can be started.

1. (A) Die Ober- und Unterzweigschalter derselben Phase werden nicht eingeschaltet.
2. (B) Unter den drei Phasen wird der Oberzweigschalter einer Phase eingeschaltet und werden die Unterzweigschalter der verbleibenden zwei Phasen eingeschaltet.
3. (C) Der zu der rotierenden elektrischen Maschine 30 fließende d-Achsen-Strom Id ist Null.

If YES in step S15, the diagnosis unit goes 90 to step S16. The diagnostic unit 90 leads the phase currents to the phase windings 35U to 35W. According to the present embodiment, the switches of the armature feed circuit 51 driven to satisfy the conditions (A), (B) and (C) described below.

1. (A) The upper and lower branch switches of the same phase are not turned on.
2. (B) Among the three phases, the upper branch switch of one phase is turned on, and the sub-branch switches of the remaining two phases are turned on.
3. (C) The to the rotating electric machine 30 flowing d-axis current Id is zero.

4 shows an example in which the U-phase upper branch switch SUp is turned on and the V and W phase sub-branch switches SVn and SWn are turned on. According to the present embodiment, in a state in which a current flows to the upper-branch switch of one phase and the sub-branch switches of two phases, and the field current flows to the field winding 32, the phase current and the field current that are the d and q axes Currents Id and Iq satisfying the above-described expression (eq2) are set as the armature side threshold value Iath and the field side threshold value Ifth. In this case, for example, one or more armature-side threshold values Iath can be separately set corresponding to each phase of the sub-arm switches that are turned on among the three phases.

In step S16, the diagnostic unit drives 90 the switches of the armature feed circuit 51 such that by the armature current procurement unit 84 procured phase current Iar is increased to an armature diagnostic current Iadg in a state in which the calculation unit 87 is instructed, the switches of the field supply circuit 52 in the off state so that the field current Ifr is zero. The armature diagnostic current Iadg is greater than the armature-side threshold Iath. In this case, a phase current on the basis of the voltage drop across the shunt resistor connected to the source side of the sub-branch switch turned on when the armature current Iar is used.

Then the diagnostic unit will run 90 in step S17, an armature-side diagnostic process. In the armature-side diagnostic process, the diagnostic unit determines 90 on the basis of the phase current Iar, whether an abnormality with respect to the armature feed circuit 51 occurred or not.

According to the present embodiment, there is an abnormality with respect to the armature feed circuit 51 an abnormality in the armature feed circuit 51, an interruption abnormality in an electric path, the armature feed circuit 51 and each of the phase windings 35U to 35W connects, an anomaly in the anchor drive unit 88 , an abnormality with respect to the generation of the drive signals for the switches SUp to SWn of the armature feed circuit 51 through the calculation unit 87 , an abnormality in a signal transmission path from the armature drive unit 88 to the armature feed circuit 51 and an abnormality in a signal transmission path from the calculation unit 87 to the anchor drive unit 88 on. The anomaly in the armature feed circuit 51 has an abnormality in the switches SUp to SWn of the armature feed circuit 51 on.

For example, if a break occurs in the electrical paths that the armature feed circuit 51 with the phase windings 35U to 35W No current flows to one or more of the sub-branch switches of the two phases for which the command to turn-on is issued. Therefore, in step S17, the diagnosis unit determines 90 in that one or more of the phase currents Iar of the two phases for which the command for switching on has been input is zero, and determines that there is an abnormality with respect to the armature feed circuit 51 occured.

When it is determined in step S17 that there is an abnormality with respect to the armature feed circuit 51 has occurred, the diagnostic unit 90 perform a process to get a message about the abnormality outside the control unit 90 to give.

In step S16, the above-described condition (B) may be changed to a condition that among the three phases, the two-phase upper branch switches are turned on and the sub-branch switch of the remaining phase is turned on. In this case, in a state in which a current flows to the upper-branch switches of the two phases and the sub-branch switch of one phase and the field current flows, the phase current and the field current consisting of the d- and q-axis currents Id and Iq which satisfy the above-described expression (eq2), as the armature-side threshold Iath and the field-side threshold value Ifth are set.

In addition, in step S16, the above-described condition (B) may be changed to a condition that, among the three phases, the upper-branch switch of one phase is turned on and the sub-branch switch of one of the remaining two phases is turned on. In this case, in a state in which a current flows to the one-phase upper branch switch and the sub-branch switch, and the field current flows, the phase current and the field current derived from the d- and q-axis currents Id and Iq can be derived which satisfy the above-described expression (eq2), are set as the armature side threshold value Iath and the field side threshold value Ifth. In this case, since the sub-branch switch that is turned on is that of a single phase, the armature-side threshold can be set for only a single phase.

In the subsequent step S18, the diagnosis unit determines 90 whether the armature-side diagnostic process is completed or not. If it is determined in step S18 that the armature-side diagnosis process is not completed, the diagnosis unit returns 90 back to step S17. On the other hand, when it is determined in step S18 that the armature-side diagnosis process is completed, the diagnosis unit starts 90 a drive of the armature feed circuit 51 such that the armature current Iar decreases from the armature diagnostic current Iadg to zero.

Hereinafter, the abnormality determination process according to the present embodiment is explained with reference to FIG 5 described. 5 FIG. 12 shows transitions in the phase current Iar serving as the armature current, the q-axis current Iq, the field current Ifr and the generated torque Trq of the rotary electric machine 30 , According to 5 For example, the d-axis current Id is zero and the reluctance torque is zero, as described above.

According to the in 5 In the example shown, a flow of field current Ifr starts at time t0. Subsequently, at the time t1, the field current Ifr reaches the field diagnostic current Ifdg. From the time t1 on, the field diagnostic process is started. At the time t2, the field-side diagnosis is completed. In the in 5 Example shown is a diagnosis that has an abnormality with respect to the field supply circuit 52 did not occur. After completion of the field-side diagnosis, the field current Ifr starts to decrease to zero.

Subsequently, at the time t3, the field current Ifr reaches the field side threshold value Ifth. Therefore, the phase current starts to flow while the field current Ifr decreases. Subsequently, at the time t4, the field current Ifr becomes zero. At time t5, the phase current Iar reaches the armature diagnostic current Iadg. According to the present embodiment, at time t4, the phase current Iar reaches the armature-side threshold Iath.

From time t5, the armature-side diagnostic process is started. At the time t6, the armature-side diagnostic process is completed. In the in 5 In the example shown, a diagnosis is made that an abnormality with respect to the armature feed circuit 51 did not occur. Upon completion of the armature-side diagnostics, the phase current Iar decreases to zero. At time t7, the phase current Iar becomes zero.

In the above-described diagnostic process, during the period from time t3 to t4, field current Ifr and phase current Iar are greater than zero. However, during this period, the field current Ifr is equal to or smaller than the field side threshold value Ifth, and the phase current Iar is equal to or smaller than the armature side threshold value Iath. Therefore, the generated torque Trq of the rotary electric machine 30 be set to be lower than the torque threshold TLMT. According to the present embodiment, as described above, the torque threshold TLMT is set to a value at which the user of the vehicle does not physically perceive vibrations in the vehicle associated with the torque even when the rotary electric machine 30 Torque generated while the vehicle is in the stopped state. Therefore, the abnormality diagnosis process can be performed without inconvenience to the user.

In addition, according to the present embodiment, the following effects can also be obtained.

Upon completion of the field side diagnosis process, when it is determined that the field current Ifr has reached the field side threshold value Ifth, the diagnosis unit starts 90 to supply the phase current Iar before the field current Ifr decreases to zero. Therefore, the timing at which the phase current Iar reaches the armature diagnostic current Iadg can be made earlier (advanced). As a result, the timing at which the armature-side diagnosis process is started can be made earlier (brought forward). Furthermore, a period of time required to complete the armature-side diagnosis process after starting the field-side diagnostic process can be shortened.

The d-axis current Id is zero during the armature-side diagnostic process. Therefore, this can be done by the rotating electrical machine 30 generated reluctance torque can be set to zero. As a result, the generated torque of the rotary electric machine 30 be suppressed during the armature-side diagnostic process. User-experienced inconveniences can be further suppressed in an advantageous manner.

The rotor 31 the rotating electric machine 30 and the output shaft 10a of the engine 10 are able to over the belt 42 always carry out a power transmission. In this case, the risk of the user of the vehicle experiencing inconvenience is high should the rotating electric machine 30 Generate torque as a result of the field current being supplied while the field-side diagnostic process is being performed. In addition, the risk of the user experiencing inconvenience is high, should the rotating machine 30 Dremoment as a result of generating phase currents to the phase windings 35U to 35W when the armature-side diagnostic process is performed.

According to the present embodiment having the configuration in which power transmission can always be performed and the risk of the user experiencing inconvenience is high, as described above, performing the abnormality diagnosis process is wherein the generated torque of the rotary electric machine 30 while the diagnosis can be made to be equal to or smaller than the torque threshold TLMT, very advantageous.

Second Embodiment

Hereinafter, a second embodiment will be described with reference to the drawings. There are mainly described the differences from the first embodiment described above. According to the present embodiment, after completion of the field side diagnosis process, the supply of the phase current is started after the field current Ifr decreases to zero.

6 FIG. 15 shows the steps in an abnormality diagnosis process according to the present embodiment. FIG. The process is performed by the diagnostic unit 90 carried out. In 6 are processes identical to those described above, in 3 shown processes, for the sake of simplicity with the same step numbers.

In this sequence of processes, if YES is determined in step S10, the diagnosis unit goes 90 to step S30. The Dianose unit 90 determines whether the by the armature current acquisition unit 84 Iar procured phase current is zero or not. The diagnostic unit 90 performs this process to determine whether or not the condition is such that feeding the field current can be started.

If YES is determined in step S30, the diagnosis unit goes 90 to step S12. Subsequently, if YES is determined in step S14, the diagnosis unit goes 90 to step S40. In step S40, the diagnosis unit determines 90 whether the field current Ifr is zero or not. The diagnostic unit 90 performs this process to determine if the condition is such that supplying the phase currents to the phase windings 35U to 35W can be started. If YES is determined in step S40, the diagnosis unit goes 90 to step S16.

Next, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG 7 described. 7 corresponds to the one described above 5 ,

In the in 7 As shown, at time t2, the field-side diagnostic process is completed and the field current Ifr begins to decrease toward zero. Subsequently, at the time t3, the field current Ifr becomes zero. Therefore, the phase current Iar starts to flow. At time t4, the phase current Iar reaches the armature diagnostic current Iadg. From time t4, the armature-side diagnostic process is started. At time t5, the armature-side diagnostic process is complete. Therefore, the phase current Iar decreases to zero. At time t6, the phase current Iar becomes zero.

In the abnormality diagnosis process according to the present embodiment, the phase current Iar starts to flow after the field current Ifr becomes zero. Therefore, the generated torque of the rotary electric machine 30 during the period of time from the start of the field-side diagnostic process to the completion of the armature-side diagnostic process are set to zero. As a result, it can be advantageously suppressed that the user of the vehicle experiences inconvenience.

(Third Embodiment)

Hereinafter, a third embodiment will be described with reference to the accompanying drawings. There are mainly described the differences from the first embodiment described above. According to the present embodiment, the armature-side diagnosis process is performed first. The field-side diagnostic process is then performed upon completion of the armature-side diagnostic process.

8th FIG. 15 shows the steps in an abnormality diagnosis process according to the present embodiment. FIG. The process is performed by the diagnostic unit 90 carried out. In 8th For the sake of simplicity, processes are identical to those in 3 shown processes are described with the same step numbers.

In this sequence of processes, if YES is determined in step S10, the diagnosis unit goes 90 to step S15 via. Subsequently, in step S17, the diagnostic unit executes 90 the anchor-side diagnostic process.

Then, if YES is determined in step S18, the diagnosis unit goes 90 to step S11 via. If YES is determined in step S11, the diagnosis unit goes 90 to step S12. Subsequently, in step S13, the diagnosis unit 90 the field-side diagnostic process.

Next, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG 9 described. 9 corresponds to the one described above 5 ,

In the in 9 For example, at time t0, the phase current Iar begins to flow. Subsequently, at the time t1, the phase current Iar reaches the armature diagnostic current Iadg. From time t1, the armature-side diagnostic process is started. At time t2, the diagnostic process is completed. Therefore, the phase current Iar starts to decrease toward zero.

Subsequently, at time t3, the phase current Iar reaches the armature side threshold Iath. Therefore, the field current Ifr starts to flow while the phase current Iar decreases. Subsequently, at time t4, the phase current Iar becomes zero. At the time t5, the field current Ifr reaches the field diagnostic current Ifdg. According to the present embodiment, at the time t4, the field current Ifr reaches the field side threshold value Ifth.

From time t5, the field-side diagnostic process is started. At time t6, the field-side diagnostic process is completed. Therefore, the field current Ifr decreases to zero. At the time t7, the field current Ifr becomes zero.

According to the present embodiment described above, the timing at which the field current Ifr reaches the field diagnostic current Ifdg may be made earlier (advanced). As a result, the timing at which the field-side diagnosis process is started can be made earlier. Furthermore, a time period required to complete the field-side diagnosis process after the start of the armature-side diagnosis process can be shortened.

(Fourth Embodiment)

Hereinafter, a fourth embodiment will be described with reference to the drawings. There are mainly described the differences from the third embodiment described above. According to the present embodiment, after completing the armature-side diagnostic process, the field current is started after the phase current Iar becomes zero.

10 FIG. 15 shows the steps in an abnormality diagnosis process according to the present embodiment. FIG. The process is performed by the diagnostic unit 90 carried out. In 10 are processes that are identical to those in 8th The processes shown above are designated with the same step numbers for the sake of simplicity.

In this sequence of processes, if YES is determined in step S18, the diagnosis unit determines in step S30 90 Whether the phase current Iar is zero or not. If YES is determined in step S30, the diagnosis unit goes 90 to step S12.

Next, the abnormality diagnosis process according to the present embodiment will be described with reference to FIG 11 described. 11 corresponds to the one described above 9 ,

In the in 11 For example, at time t0, the phase current Iar begins to flow. Subsequently, at the time t1, the phase current Iar reaches the armature diagnostic current Iadg. From time t1, the armature-side diagnostic process is started. At time t2, the armature-side diagnostic process is completed. Therefore, the phase current Iar starts to decrease toward zero. Subsequently, the phase current Iar reaches zero at the time t3. Therefore, the field current Ifr starts to flow. Subsequently, the field current Ifr reaches the field diagnostic current Ifdg and the field-side diagnostic process is started. Then, at the time t4, the field-side diagnosis process is completed. Therefore, the field current Ifr decreases to zero. At the time t5, the field current Ifr becomes zero.

According to the present embodiment described above, as shown in FIG 11 is shown, the generated torque of the rotary electric machine 30 during the period from the start of the armature-side diagnostic process to the completion of the field-side diagnostic process Zero be set. As a result, it can be advantageously suppressed that the user of the vehicle experiences inconvenience.

(Fifth Embodiment)

Hereinafter, a fifth embodiment will be described with reference to the drawings. There are mainly described the differences from the first embodiment described above. According to the present embodiment, in the armature-side diagnosis process using the d-axis current Iq, instead of the phase current Iar, it is diagnosed whether there is an abnormality with respect to the armature-feeding circuit 51 occurred or not.

12 FIG. 15 shows the steps in an abnormality diagnosis process according to the present embodiment. FIG. The process is performed by the diagnostic unit 90 carried out. In 12 For the sake of simplicity, processes are identical to those in 3 shown processes are described with the same step numbers.

In this sequence of processes, if YES is determined in step S10, the diagnosis unit goes 90 to step S50. The diagnostic unit 90 determines whether or not the q-axis current Iq is equal to or smaller than the armature-side threshold Iath. The diagnostic unit 90 performs this process to determine whether or not the condition is such that supplying the field current to the field winding 32 can be started. Here, the q-axis current Iq may be determined based on the current obtained by the armature current acquisition unit 84 procured phase current Iar and that of the magnetic field detection unit 86 output angle signal are calculated.

In addition, for example, the armature side threshold Iath according to the present embodiment may be set to a q-axis current based on a combination of the d- and q-axis currents Id and Iq satisfying the above-described excerpt (eq2). is given in a state in which a current to the upper branch switch a ( 1 ) Phase and the sub-branch switches of two phases flows.

If YES is determined in step S50, the diagnosis unit goes 90 to step S12. Subsequently, the diagnostic unit goes 90 via step S16 to step S60. In step S60, the diagnostic unit performs 90 the armature-side diagnosis process based on the q-axis current Iq instead of that by the armature current acquisition unit 84 procured phase current Iar through. The q-axis current Iq is calculated based on the phase current Iar and the angle signal. For example, if it is determined that the q-axis current Iq is zero, the diagnostic unit may 90 determine that an abnormality with respect to the armature feed circuit 51 occured. Upon completion of step S60, the diagnostic unit proceeds 90 to step S18.

According to the present embodiment described above, effects similar to the effects according to the first embodiment can also be obtained.

(Sixth Embodiment)

Hereinafter, a sixth embodiment will be described with reference to the drawings. There are mainly described the differences from the first embodiment described above. According to the present embodiment, when the armature-side diagnosis process is performed, the switches of the armature feeding circuit 51 driven such that the d-axis current Id is a value other than zero and the q-axis current Iq is zero.

13 FIG. 15 shows the steps in an abnormality diagnosis process according to the present embodiment. FIG. This process is performed by the diagnostic unit 90. In 13 For the sake of simplicity, processes are identical to those in 3 shown processes are described with the same step numbers.

In this sequence of processes, if YES is determined in step S15, the diagnosis unit goes 90 to step S70. The diagnostic unit 90 drives the switches of the armature feed circuit 51 such that the following conditions are in a state where the switches of the field supply circuit 52 are maintained in the OFF state so that the field current Ifr is zero. The conditions are that the phase current Iar obtained by the armature current acquisition unit 84 is applied to the armature diagnostic current Iadg is greater than the armature-side threshold Iath, and the d-axis current Id is a non-zero value and the q-axis current Iq is zero. Subsequently, the diagnostic unit goes 90 to step S17.

According to the present embodiment, this can be done by the rotating electrical machine 30 Torque generated during the armature diagnostic process can be set to zero. Therefore, the generated torque of the rotary electric machine 30 be suppressed during the armature-side diagnostic process. It can be more advantageously suppressed that the user experiences inconvenience.

(Seventh Embodiment)

Hereinafter, a seventh embodiment will be described with reference to the drawings. There are mainly described the differences from the first embodiment described above. According to the present embodiment, when the armature-side diagnosis process is performed, a demagnetizing current of the field winding 32 fed. That is, should the field winding 32 be magnetized, when the armature-side diagnostic process is performed, the field current to the field winding 32 flow and can the generated torque of the rotating electrical machine 90 be greater than the torque threshold TLMT, regardless of that the switches of the field supply circuit 52 be driven so that the field current is zero. Therefore, according to the present embodiment, the demagnetizing current is supplied.

14 FIG. 15 shows the steps in an abnormality diagnosis process according to the present embodiment. FIG. The process is performed by the diagnostic unit 90 carried out. In 14 For the sake of simplicity, processes are identical to those in 3 The processes shown above are designated by the same step numbers.

In this sequence of processes, if YES is determined in step S15, the diagnosis unit goes 90 to step S80. The diagnostic unit 90 The phase currents lead the phase windings 35U to 35W in the manner described above with reference to step S16. In addition, as in 15 is shown, in step S80, the diagnostic unit 90 the calculation unit 87 to generate drive signals for alternately turning on the second upper branch switch SH2 and the second sub branch switch SH2. The diagnostic unit 90 has the calculation unit 87 Also, to generate drive signals to maintain the first upper branch switch SH1 in the OFF state, and the first sub-branch switch SL1 in the ON state. At this time, the duty factor Duty (= Ton / Tsw) is set to a larger value as a command value for the demagnetizing field current increases. The duty Duty is a ratio of the ON time Ton with respect to a single switching cycle Tsw of the second upper branch switch SH2. Then the diagnostic unit will run 90 the armature-side diagnostic process in a state in which the Entmagnetisierungsfeldstrom flows.

According to the present embodiment, when the switches of the field supply circuit 52 are driven to be turned off, so that the field current becomes zero, a maximum value of the field current leading to the field winding 32 can flow less than the field-side threshold Ifth. Therefore, the diagnostic unit 15 determine YES in step S15 even if the demagnetizing field current does not flow.

According to the present embodiment, in a state where a field portion of the rotary electric machine 30 , the field winding 32 and the permanent magnet 33 has magnetized, be eliminated. Therefore, it can be advantageously prevented that the generated torque of the rotary electric machine 30 becomes greater than the torque threshold TLMT when the armature-side diagnostic process is performed.

Other Embodiments

The embodiments described above may be modified in the following manner.

The execution condition for the abnormality diagnosis process is not limited to that described in step S10 in FIG 3 has been described according to the first embodiment described above. For example, the execution condition may be that the vehicle is in a stopped state during a single trip from the time when the diagnostic unit 90 determines that the User has given the command to use the vehicle until the time when the diagnostic unit 90 determines that the user has given the command to stop using the vehicle. In this case, for example, the torque threshold TLMT can be set to a value at which the drive wheel 43 does not start to turn as a result of the torque, even if the rotating electric machine 30 Torque generated to be set in a state in which a power transmission from the rotor 31 is allowed on the drive wheels 43 and the vehicle is in the stopped state.

A salient pole machine in which Ld ≈ Lq can be used as a rotating electric machine 30 be used. In this case, the reluctance torque is substantially zero. The torque of the rotating electrical machine 30 can be controlled by the field current and the q-axis current.

In addition, the rotating electric machine 30 not limited to the salient pole machine. A non-salient pole machine may be used. In this case, Ld = Lq. The torque Trq of the rotating electric machine 30 is determined on the basis of the field current If and the q-axis current Iq as described in an expression (eq3) described below.

Equation 3

$$Trq=p\cdot M\cdot If\cdot Iq$$

According to the embodiment described above, both the field-side abnormality diagnosis and the armature-side abnormality diagnosis are performed. However, the present disclosure is not limited thereto. One of the diagnostic processes can be performed.

The process in S11 in 3 according to the first embodiment described above and 6 can be replaced by a process in which it is determined whether the phase current Iar is equal to or smaller than the armature-side threshold Iath or not.

The process in step S15 in FIG 3 According to the first embodiment described above, it can be replaced by a process in which it is determined whether the field current Ifr is a predetermined field current which is larger than zero and smaller than the field side threshold value Ifth.

In step S16 in FIG 3 According to the first embodiment described above, the switches of the armature-side supply circuit 51 are driven so that a condition that the q-axis current Iq is zero, is satisfied.

The process in step S11 in FIG 8th According to the above-described third embodiment, it may be replaced by a process of determining whether or not the phase current Iar is a predetermined phase current that is greater than zero and less than the armature-side threshold value Iath.

According to the embodiments described above, the armature feeding circuit 51 driven so that the phase current is zero when the field-side diagnostic process is performed. However, the present disclosure is not limited thereto. The armature feed circuit 51 may be driven such that the phase current is a non-zero value when the field-side diagnostic process is performed under a condition that the generated torque of the rotary electric machine 30 is equal to or less than the torque threshold TLMT.

According to the first to sixth embodiments described above, the field feeding circuit becomes 52 driven so that the field current is zero when the armature-side diagnostic process is performed. However, the present disclosure is not limited thereto. The field supply circuit 52 may be driven so that the field current is a non-zero value when the armature-side diagnosis process is performed, under a condition that the generated torque of the rotary electric machine 30 is equal to or less than the torque threshold TLMT.

The component that the rotor 31 the rotating electric machine 30 with the output shaft 10a the engine 10 connects so that power transfer between the rotor 31 and the output shaft 10a always possible is not on the belt 42 limited. Other components can be used.

The switches that the power supply unit 50 configure are not limited to MOSFETs. For example, insulated gate bipolar transistors (IGBTs) can be used. In this case, a freewheeling diode is reversely connected in parallel with each IGBT.

The rotating electric machine 30 is not limited to that provided with functions of an engine. The rotating electric machine 30 can only be provided with the functions of a power generator.

The vehicle on which the control unit 60 attached, may be a vehicle in which power between the rotor 31 and the output shaft 10a between a transmitted state and an interrupted state can be switched. In addition, the vehicle is not limited to that having only the engine as a power source for driving the vehicle. For example, the vehicle may only have a rotary electric machine serving as the main engine as the power source for driving the vehicle. Alternatively, the vehicle has an engine in addition to the rotary electric machine serving as a main engine as the power source for driving the vehicle. Furthermore, the control device 60 not limited to that mounted in a vehicle.

A field side threshold and an armature side threshold are set as a combination of a field current and an armature current in which a generated torque of a rotary electric machine is equal to or less than a torque threshold. A diagnostic apparatus diagnoses an abnormality with respect to a field supply circuit based on a field current in a state where a drive is performed such that the field current is larger than the field side threshold and an armature current is equal to or smaller than the armature side threshold. The diagnostic apparatus diagnoses an abnormality with respect to a armature feed circuit based on armature current in a state where the drive is performed such that the field current is equal to or smaller than the field side threshold and the armature current is greater than the armature side threshold.

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• WO 2013/171843 [0002]

Claims (10)

A diagnostic apparatus for a system, the system comprising a rotary electric machine (30) having an armature winding (35U to 35W) and a field winding (32), a armature feed circuit (51) driven to supply armature current to the armature winding, and a field supply circuit (52) which is driven to supply a field current to the field winding, wherein a field-side threshold which is a threshold value for the field current and an armature-side threshold value which is a threshold value for the armature current are set as a combination of the field current and the armature current at which a generated torque of the rotary electric machine is equal to or less than is a torque threshold, and the diagnostic device has: a drive unit (87 to 89) that drives the armature feed circuit and / or the field supply circuit, and a diagnostic unit (90) that performs a field-side diagnostic process and / or an anchor-side diagnostic process, wherein the field side diagnostic process is a diagnostic process in which an abnormality with respect to the field supply circuit is diagnosed based on the field current in a state where the drive unit drives such that the field current is greater than the field side threshold and the armature current is the same as or is less than the armature-side threshold, and the armature-side diagnosis process is a diagnosis process in which abnormality with respect to the armature energizing circuit is diagnosed based on the armature current in a state where the drive unit drives such that the field current is equal to or smaller than the field side threshold and the armature current is larger as the armature side threshold. Diagnostic device after Claim 1 wherein the diagnostic unit performs the armature-side diagnostic process upon completion of the field-side diagnostic process, and the drive unit drives the armature feed circuit and the field feed circuit such that upon completion of the field-side diagnostic process, the armature current increases toward the armature side threshold at a time when the field current is increased decreases a predetermined value greater than zero and equal to or less than the field-side threshold. Diagnostic device after Claim 1 wherein the diagnostic unit performs the field-side diagnostic process upon completion of the armor-side diagnostic process, and the drive unit drives the armature feed circuit and the field feed circuit such that upon completion of the armor-side diagnostic process, the field current increases toward the field side threshold at a time when the armature current is increased decreases a predetermined value greater than zero and equal to or less than the field-side threshold. Diagnostic device after Claim 1 wherein the diagnostic unit performs the armature-side diagnostic process upon completion of the field-side diagnostic process, and the drive unit drives the armature feed circuit and the field feed circuit to maintain the armature current at zero when the field-side diagnostic process is performed and the armature current closes upon completion of the field-side diagnostic process increases the armature-side threshold to a time at which the field current decreases to zero. Diagnostic device after Claim 1 wherein the diagnostic unit performs the field side diagnostic process upon completion of the armor side diagnostic process, and the drive unit drives the armature feed circuit and the field feed circuit to maintain the field current at zero when the armature side diagnostic process is performed, and after completion of the armor side diagnostic process, the field current increases increases the armature-side threshold to a time at which the armature current decreases to zero. Diagnostic device according to one of Claims 2 to 5 wherein the armature current in the diagnostic unit and the drive unit is a q-axis current of the rotary electric machine. Diagnostic device according to one of Claims 2 to 6 wherein the drive unit drives the armature feed circuit such that a d-axis current or a q-axis current of the rotary electric machine is zero when the armature current is supplied. Diagnostic device according to one of Claims 2 to 6 wherein the drive unit drives the field supply circuit to supply a field current for demagnetizing a field portion (32) of the rotary electric machine that is magnetized when the armature-side diagnosis process is performed. Diagnostic device according to one of Claims 1 to 8th wherein the diagnostic apparatus is mounted on a vehicle, the vehicle has an engine (10) as a power source for driving the vehicle, and a rotor (31) of the rotary electric machine is connected to an output shaft (10a) of the engine such that the engine Rotor and the output shaft are always capable of power transmission. Diagnostic device after Claim 9 wherein the torque threshold is set to a value at which a user of the vehicle does not physically perceive vibrations in the vehicle associated with the torque when the rotary electric machine generates torque while the vehicle is in a stopped state.

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