JP2017063571A - Abnormal motor driving type discrimination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an abnormal motor driving type discrimination device capable of discriminating the type of abnormality as accurate as possible.SOLUTION: When driving a motor 3 and discriminating the abnormality type, a drive section 9 performs drive control of switches 5uu, 5ud, 5vu, 5vd, 5wu, 5wd of a plurality of phases, on the basis of a plurality of predetermined energization patterns. The drive section 9 energizes the motor 3 through the switches 5uu, 5ud, 5vu, 5vd, 5wu, 5wd, on the basis of a voltage given between a high potential side power line N1 and a low potential side power line N2. The drive section 9 collates the plurality of predetermined energization patterns and a signal acquired by a detector 10 corresponding to the plurality of energization patterns or a signal stage evaluating the signal gradually, with an abnormality type correspondence table stored in a storage section 11. The drive section 9 discriminates at least more than one type of abnormality out of disconnection of a load line 2, short circuit to the high potential side power line N1, short circuit to the low potential side power line N2, and phase-to-phase short circuit of the motor 3.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor drive abnormality type discriminating apparatus that discriminates the type of abnormality related to motor driving.

  In general, a motor drive device is configured by connecting main circuit semiconductor elements constituting a three-phase arm between DC positive and negative buses (see, for example, Patent Document 1). According to the technique described in Patent Document 1, a high resistance is connected in series between the DC positive and negative bus lines, a high resistance divided voltage is applied to any phase of the three-phase arm, and an open / disconnection abnormality of the main circuit line is detected. Judgment. In this determination method, when one element of the main circuit semiconductor element of the three-phase arm is turned on and the potential of each common connection point of the three-phase arm is equal, it is determined that the main circuit line is not disconnected, and the common connection point This is a method for determining that the main circuit line is disconnected when the potential of V is “V” or “zero”.

  Another method is also provided as such a disconnection abnormality determination method (see, for example, Patent Document 2). The technology described in Patent Document 2 determines the failure of the current-carrying line of each phase of the electric motor for each phase, and performs open-loop control of the electric motor with a normal phase without using the phase determined to be this failure. This is a method of determining a disconnection failure when the electric motor is operated and determining a short-circuit failure when the electric motor is not operated.

Japanese Patent No. 5369818 Japanese Patent No. 4406453

  In the technique described in Patent Document 1, the open / disconnected state of the main circuit line is determined according to the behavior of the high-resistance intermediate potential. Therefore, when a power fault / ground fault occurs, the potential of the arm of the other phase is also increased through the motor. It is dragged by the electric potential that has been entangled / grounded, and it cannot be specified which phase is abnormal.

  The technique described in Patent Document 2 can distinguish between a disconnection failure and a short-circuit failure, but cannot distinguish between a disconnection failure and a failure related to a short circuit to a high-potential-side power supply line / short-circuit to a low-potential-side power supply line. In addition, since a high-resistance is used to distinguish a phase failure, as in the technique described in Patent Document 1, any short circuit to a high potential power line or short circuit to a low potential power line occurs. Cannot determine whether the phase is abnormal.

  An object of the present invention is to provide a motor drive abnormality type discriminating apparatus capable of discriminating the type of abnormality as accurately as possible.

  According to the first aspect of the invention, when the discriminating unit discriminates the type of motor drive abnormality, the driving unit drives and controls a plurality of phase switches based on a plurality of predetermined energization patterns. The motor is energized through the switch based on the voltage applied between the line and the low-potential side power line, and a plurality of predetermined energization patterns and signals acquired by the acquisition unit corresponding to the plurality of energization patterns Alternatively, the load signal is disconnected, the load wire is short-circuited to the high-potential-side power supply line, the load according to the comparison of the signal step obtained by stepwise evaluation with the abnormality type correspondence table stored in the storage unit. At least two or more types of abnormality among the types of abnormality such as a short circuit of the line to the low potential power line and a short circuit between the motor phases are determined. This makes it possible to determine the type of abnormality as accurately as possible.

1 is an electrical configuration diagram schematically showing a motor drive abnormality type discrimination device in a first embodiment. Flow chart schematically showing motor drive abnormality type discrimination processing Timing chart schematically explaining the relationship between the mode and drive signal from normal operation to determining the type of abnormality An explanatory view showing an example of a plurality of energization patterns It is a figure which shows an abnormality kind correspondence table, and is explanatory drawing which shows an example in case a signal stage is recorded Timing chart that outlines the operation to determine the type of abnormality Diagram showing current flow when connector is disconnected A diagram (part 1) schematically showing the flow of current at the time of disconnection Diagram showing current flow during disconnection (part 2) Diagram showing current flow when power supply is short-circuited (Part 1) Diagram showing current flow when power supply is shorted (Part 2) Diagram showing current flow when ground is short-circuited (Part 1) Diagram showing current flow when ground is short-circuited (Part 2) Diagram showing current flow during phase short-circuit (part 1) Diagram showing current flow during phase-to-phase short circuit (Part 2) Explanatory drawing which shows the several electricity supply pattern in 2nd Embodiment. It is a figure which shows an abnormality kind correspondence table, and is explanatory drawing which shows an example in case a signal stage is recorded Explanatory drawing which shows the several electricity supply pattern in 3rd Embodiment. It is a figure which shows an abnormality kind correspondence table, and is explanatory drawing which shows an example in case a signal stage is recorded Explanatory drawing which shows an example of the several electricity supply pattern in 4th Embodiment It is a figure which shows an abnormality kind correspondence table, and is explanatory drawing which shows an example in case a signal stage is recorded Electrical configuration diagram schematically showing a motor drive abnormality type discrimination device in a fifth embodiment

  Hereinafter, several embodiments of a motor drive abnormality type discrimination device will be described with reference to the drawings. In the following description, components having the same or similar functions as those described in each embodiment are denoted by the same reference numerals or similar symbols, and description thereof will be omitted as necessary in the second and subsequent embodiments.

(First embodiment)
1 to 15 are explanatory diagrams of the first embodiment. FIG. 1 is a block diagram schematically showing the electrical configuration of the motor controller 1. The motor controller 1 operates by receiving a DC voltage + B supplied from a vehicle-mounted battery (not shown) through the high-potential side power supply line N1 and the low-potential side power supply line N2, and AC to the brushless motor 3 as a load through the load line 2 Output voltage. For example, a power supply voltage + B is applied to the high potential power supply line N1, and a ground voltage is applied to the low potential power supply line N2, for example.

  The motor controller 1 includes a control circuit 4 mainly composed of a microcomputer, and six N-channel MOS transistors 5uu, 5ud, 5vu, 5vd, 5wu, and the like that constitute a three-phase arm of U, V, and W, for example. A driver IC 5 having 5 wd (corresponding to a switch: hereinafter referred to as upper arm 5 uu, 5 vu, 5 wu, lower arm 5 ud, 5 vd, 5 wd) is connected. The U-phase to W-phase upper arms 5uu, 5vu, 5wu and the lower arms 5ud, 5vd, 5wd constitute leg 6u, 6v, 6w of the respective phases. The three-phase bridge circuit 7 is configured by connecting legs 6u, 6v, and 6w between the high potential side power supply line N1 and the low potential side power supply line N2.

  For example, one sense resistor 8 is connected to the current path between the drain and source of the upper arms 5uu, 5vu, 5wu and the lower arms 5ud, 5vd, 5wd. The sense resistor 8 is connected to the low potential side power supply line N2 side of the three-phase bridge circuit 7 and is used as an acquisition unit.

  The control circuit 4 controls the drive of the driver IC 5 and also includes a drive unit 9 configured as a control unit, a determination unit, a notification unit, and a stage division unit, a predetermined node of the driver IC 5 (for example, an intermediate node of each arm of the three-phase bridge) Nu, Nv, Nw, a detection unit 10 for detecting and acquiring the voltage of the terminal node Ns) of the sense resistor 8 and a storage unit 11 are provided. The storage unit 11 is a semiconductor memory such as a ROM, RAM, or EEPROM. This storage unit 11 is used as a non-transitional tangible recording medium. The detection unit 10 can detect a current value supplied to the motor 3 in accordance with the terminal voltage value of the sense resistor 8 and is used as an acquisition unit. The drive unit 9 of the control circuit 4 can drive and control the driver IC 5 based on a program stored in the storage unit 11.

  The drive unit 9 in the control circuit 4 drives and controls the driver IC 5 according to the voltage detected by the detection unit 10. At this time, the drive unit 9 drives the three-phase bridge circuit 7 by outputting a PWM signal to the three-phase bridge circuit 7. An engine ECU 13 is connected to the outside of the motor controller 1 through, for example, an in-vehicle network 12.

  A method for detecting and discriminating abnormality in the operation of the above configuration will be described. By applying the abnormality determination method according to the present embodiment, it is possible to determine all types of abnormality that occur when the motor 3 is driven. FIG. 2 is a flowchart schematically showing the operation, and FIG. 3 is a timing chart schematically explaining the relationship between the mode and the drive signal from the normal operation to the determination of the abnormal type.

  First, in the normal mode, the motor controller 1 drives the motor 3 by outputting a PWM signal to the three-phase bridge circuit 7 based on the command signal in step S1. At this time, the motor controller 1 drives the motor 3 as usual, but when the abnormality occurs at the timing t1 in FIG. 3 and the abnormality is detected at the step S2 in FIG. 2 and the timing t2 in FIG. Is shifted to an abnormality determination mode, and the cause of the abnormality is determined by performing the processing shown in steps S3 to S11 in FIG.

  If an abnormality occurs when the motor 3 is driven, the drive unit 9 of the control circuit 4 can determine that an abnormality has occurred by indicating an abnormal value obtained by the detection unit 10 deviating from a predetermined normal range. Examples of the acquired value of the detection unit 10 include a current value Is generated in the sense resistor 8 and / or drain-source voltages Vuu, Vvu, Vwu of the upper arms 5uu, 5vu, 5wu, and the like. If the drive unit 9 of the control circuit 4 determines that an abnormality has occurred, it stops the drive control of the motor 3 in step S3 of FIG.

  And the drive part 9 of the control circuit 4 sets 0 to the variable i in step S4 of FIG. 2, and drives the motor 3 with the energization pattern Pi in step S5. The energization time at this time is, for example, about several tens of ms. FIG. 4 shows an example of the energization pattern table 14, and FIG. 5 shows the abnormality type correspondence table 15 for the energization state when each cause of abnormality occurs corresponding to the energization pattern of the energization pattern table. The energization pattern table 14 and the abnormality type correspondence table 15 are stored in the storage unit 11.

  In the energization pattern table 14 shown in FIG. 4, “PWM” indicates that the target upper arm or lower arm is PWM-driven at a predetermined duty ratio (for example, several tens of percent), and each energization pattern P0 When .about.P5 is used, the target upper arms 5uu, 5vu, 5wu and the lower arms 5ud, 5vd, 5wd are synchronously PWM driven. In FIG. 4, “-” indicates turning off.

  The energization pattern P0 is a pattern in which the U-phase upper arm 5uu is PWM-driven, the V-phase lower arm 5vd is PWM-driven, and the others are turned off. The energization pattern P1 is a pattern in which the U-phase upper arm 5uu is PWM-driven, the W-phase lower arm 5wd is PWM-driven, and the others are turned off. The energization pattern P2 is a pattern in which the V-phase upper arm 5vu is PWM-driven, the W-phase lower arm 5wd is PWM-driven, and the others are turned off. The energization pattern P3 is a pattern in which the V-phase upper arm 5vu is PWM-driven, the U-phase lower arm 5ud is PWM-driven, and the others are turned off. The energization pattern P4 is a pattern in which the W-phase upper arm 5wu is PWM-driven, the U-phase lower arm 5ud is PWM-driven, and the others are turned off. The energization pattern P5 is a pattern in which the W-phase upper arm 5wu is PWM-driven, the V-phase lower arm 5vd is PWM-driven, and the others are turned off.

  Further, in the abnormality type correspondence table 15 shown in FIG. 5, the energization state when the three-phase bridge circuit 7 is driven by the plurality of energization patterns P0 to P5 is recorded corresponding to the cause of the abnormality. The abnormality type correspondence table 15 is determined in advance so that the type of abnormality can be determined for each phase of the motor 3 (for example, the U phase, the V phase, and the W phase) by the control circuit 4, for example. According to the acquired value (for example, voltage or / and current) acquired by the detection unit 10 according to i = 0 to 5), it is a normal level, a disconnection level, a power fault level, or a ground fault level. The abnormality type identification codes “positive”, “disconnected”, “heaven”, and “ground” shown are recorded as a plurality of stages of energized states.

  For example, it is “positive” when in a normal energized state, “disconnected” when there is a possibility of disconnection of the coil of the motor 3 or the load line 2, and possibility of short circuit to the high potential side power supply line N 1 (that is, a power fault). When there is a potential, “top” is recorded, and when there is a possibility of a short circuit (ie, ground fault) to the low potential side power supply line N2, “ground” information is recorded. Note that “−” in the abnormality type correspondence table 15 shown in FIG. 5 indicates “correct”, “off”, “heaven”, “earth” because the information recorded in accordance with the threshold value is different or cannot be discriminated. This is a column that does not correspond to any of the above or any of the above, and is out of the abnormality type discrimination target.

  First, the drive part 9 drives the motor 3 using the electricity supply pattern P0 in step S5. The drive unit 9 detects and measures the current Is flowing through the sense resistor 8 using the detection unit 10 in step S6, and detects, for example, voltages Vuu, Vvu, Vwu between the drain sources of the upper arms 5uu, 5vu, 5wu, taking measurement. Here, the ON resistances of the upper arms 5uu, 5vu, 5wu and the lower arms 5ud, 5vd, 5wd are both Ron, the impedance of the motor 3 is ZL, the resistance value of the sense resistor 8 is Rs, and the upper arms 5uu, 5vu, 5wu are ON. In this case, the current that flows is Ion.

  At this time, if the drive system of the motor 3 is operating normally, the current Is flowing through the sense resistor 8 is expressed by the equations (1a) and (1b). In practice, various lines (such as the load line 2) that are energized when driving the motor 3 include impedance components such as a resistance component and an inductance component. For simplification, the impedance values of the load line 2 are ignored in the current values shown below. In the present embodiment, PWM drive is performed to determine abnormality. However, for convenience of explanation or to simplify the explanation, the current value Is and the voltage values Vuu to Vwu are simply the upper arms 5uu, 5vu, 5wu, The values when the arms 5ud, 5vd, 5wd are turned on or off are shown.

Is ＋ + B / (2Ron + ZL + Rs) = normal value (1a)
Vuu to Vwu (@on) ∝ Ron x Ion = normal value (1b)
The values of these equations (1a) and (1b) are normal values. When the drive unit 9 drives the motor 3 with the energization pattern Pi, the energization state is stored in the storage unit 11 based on the current and voltage in step S7. Here, the energized state may be a signal value itself such as the current value Is and the voltages Vuu, Vvu, and Vwu, but may store a signal stage that is evaluated and shown in stages. . In this case, the drive unit 9 divides the signal (for example, voltage or / and current) acquired by the detection unit 10 into signal stages “positive”, “off”, “heaven”, and “ground” according to the threshold value. Four levels of “positive”, “off”, “heaven”, and “earth” are stored.

  The drive unit 9 determines “positive” and stores the same in the storage unit 11 when it is determined that a current similar to that in the steady state flows in the motor 3 according to the comparison between the signal acquired by the detection unit 10 and the threshold value. Let When the drive unit 9 determines that no current is flowing in the motor 3 according to the comparison between the signal acquired by the detection unit 10 and the threshold value, the drive unit 9 determines “OFF” and stores the current in the storage unit 11. The drive unit 9 determines that it is “heaven” when it detects an overcurrent based on a short circuit (that is, a power supply fault) to the high-potential-side power supply line N1 according to the comparison between the signal acquired by the detection unit 10 and the threshold value. To be stored in the storage unit 11. The drive unit 9 determines “ground” when it detects an overcurrent based on a short circuit to the low-potential side power supply line N <b> 2 according to the comparison between the signal acquired by the detection unit 10 and the threshold value.

  When the drive unit 9 detects that the current exceeding the predetermined overcurrent threshold value flows through the sense resistor 8 by the detection unit 10 in the abnormality determination mode, the upper arm 5uu, 5vu, 5wu, the lower arm 5ud, In order to prevent destruction of 5vd and 5wd, the protection function is activated to stop energization.

  Thereafter, the drive unit 9 increments the variable i in step S9 and repeats the processes in steps S5 to S7 until the condition of the variable i = 5 is satisfied in step S8. When the condition of the variable i = 5 is satisfied in step S8, the drive unit 9 collates the energized state with the abnormality type correspondence table 15 in step S10. At this time, in step S10, the drive unit 9 uses the signal stages “positive”, “disconnected”, “heaven”, and “ground” acquired corresponding to the energization patterns P0 to P5 of the energization pattern table 14 to correspond to the abnormal types. The abnormality type identification codes “correct”, “off”, “heaven”, and “ground” in Table 15 are collated.

  Then, the drive unit 9 of the control circuit 4 determines the cause of the abnormality in step S11. When the driving unit 9 of the motor controller 1 forcibly drives the motor 3 to determine the type of abnormality, the driving unit 9 outputs this determination information to the engine ECU 13. The engine ECU 13 performs various types of abnormality processing (for example, operation stop) using the abnormality type determination information, and notifies the outside (user) by turning on and blinking a warning lamp (not shown) as necessary.

  In steps S3 to S11 of FIG. 2 and the abnormality determination mode shown in FIG. 3, the control circuit 4 switches the energization pattern Pi (where i is 0 to 5) as shown in FIG. 5vu, 5wu, and lower arm 5ud, 5vd, 5wd are PWM controlled. The number of times of PWM control is one or more times for each energization pattern Pi.

  At this time, as shown in FIG. For example, when the drive unit 9 forcibly drives the motor 3 using the energization pattern P0, the PWM pattern is repeatedly driven and stopped a plurality of times for the energization pattern P0 as indicated by timings tA, tAs, tB, tBs, tC, and tCs. And good. When the drive unit 9 is forcibly driven and the detection unit 10 detects a current exceeding a predetermined overcurrent threshold, a stop signal is generated as shown in FIG. As shown at timings ta, tb, and tc, the number of occurrences of protection is counted by a counter (not shown). Then, when the count number becomes equal to or more than the reliability threshold number that can ensure the determination of abnormality, the drive unit 9 determines that the protection content is correct, and enforces the energization pattern Pi. The drive is stopped, and the next energization pattern Pi + 1 is switched. By performing such processing, the reliability of the abnormality determination processing can be improved.

Specific examples will be described below. An example in which the signal stage of the current Is and the voltages Vuu to Vwu is used as the energized state will be described.
<When a connector is disconnected>
First, it is assumed that connector disconnection occurs as a cause of abnormality. This connector indicates, for example, a terminal for connecting the motor controller 1 and the load line 2 or a terminal for connecting the load line 2 and the motor 3. Even if any of these connectors is disconnected, it is determined as abnormal. It is desirable. The same applies when the load line 2 is disconnected due to some influence.

  When the connector is disconnected, it has the same meaning as that all the load lines 2 directed to the U, V, and W phase motors 3 are disconnected. As shown in FIG. No current flows through 8. That is, the current value Is flowing through the sense resistor 8 is expressed by the equation (2a).

Is (@ energization patterns P0 to P5) = 0 (2a)
Moreover, since the node voltages Vnu to Vnw are the power supply voltage + B in the phase where the upper arm is on, the voltages Vuu to Vwu of the upper arm are as shown in the equation (2b). Represented. Since the node voltages Vnu to Vnw become the ground potential in the phase where the lower arm is on, the drain-source voltages Vuu to Vwu of the upper arm are expressed as shown in the equation (2c).

Vuu to Vwu (@ upper arm on) = 0 (2b)
Vuu to Vwu (@ lower arm on) = + B (2c)
When the cause of the abnormality is a poor connector connection between the motor controller 1 and the load line 2 or a poor connector connection between the load line 2 and the motor 3, the above-mentioned energization patterns P0 to P5 The relationship of the expressions (2a) to (2c) is established.

  For example, in the energization pattern P0, the U-phase upper arm 5uu is PWM-driven and the V-phase lower arm 5vd is PWM-driven. At this time, the current value Is of the sense resistor 8 is 0 as shown in equation (2a). Thus, Vuu = 0 and Vvu = + B. The drive unit 9 compares these with, for example, a predetermined threshold value to obtain a result, and combines them to store the signal stage “OFF” and the storage unit 11 in step S7. The drive unit 9 of the control circuit 4 repeats these for the energization patterns P1 to P5, but similarly stores the signal stage “OFF” in the storage unit 11 in step S7. Then, the drive unit 9 can determine that it is disconnected by checking the abnormality type correspondence table 15 in step S10. Thereby, it can discriminate | determine that it is a disconnection by the connector connection failure etc.

<When load line 2 is disconnected>
Among the load lines 2 directed to the U, V, and W phase motors 3, any one of the predetermined phase N (for example, U phase) load lines 2 may be disconnected. Thus, for example, when only the U-phase load line 2 is disconnected, no current flows through the sense resistor 8 even when the U-phase upper arm 5uu is turned on as shown in FIG. 8 in the energization pattern P0. The same applies to the energization pattern P1. In the energization patterns P3 and P4, no current flows through the sense resistor 8 even if the U-phase lower arm 5ud is turned on. In this case, the current value Is flowing through the sense resistor 8 is expressed by the equation (3a).

Is (@ energization pattern P0, P1, P3, P4) = 0 (3a)
Also, the N-phase voltages Vuu to Vwu, here the U-phase voltage Vuu, will be described as an example. As shown in the energization patterns P0 and P1, the node voltage Vnu is supplied from the power source when the upper arm 5uu of the U-phase is turned on. It almost corresponds to the voltage + B. At this time, the drain-source voltage Vuu of the upper arm 5uu is expressed as shown in the equation (3b).

Vuu (@ energization pattern P0, P1) = 0 (3b)
Further, the voltages Vuu to Vwu of the other phases of the N phase, here, the voltages Vvu and Vwu will be described as examples of the V phase and the W phase. When the energization pattern P0 is used, since the V-phase lower arm 5vd is turned on, the node voltage Vnv becomes the ground voltage 0. When the energization pattern P1 is used, the lower arm 5wd of the W phase is turned on, so that the node voltage Vnw becomes the ground voltage 0. As a result, when the drive unit 9 drives the motor 3 using the energization patterns P0 and P1, the drain-source voltages Vvu and Vwu of the upper arms 5vu and 5wu are expressed as shown in equations (3c) and (3d). It is.

Vvu (@ energization pattern P0) = + B (3c)
Vwu (@ electrification pattern P1) = + B (3d)
If the drive unit 9 determines that the relationships of the expressions (3a) to (3d) are satisfied when the energization patterns P0 and P1 are applied, the drive unit 9 stores “disconnected”.

  Although not shown, when the U-phase lower arm 5ud is turned on as shown in the energization patterns P3 and P4 when the U-phase load line 2 is disconnected, the node voltage Vnu is equal to the ground voltage. 0. For this reason, the drain-source voltage Vuu of the upper arm 5uu is expressed as shown in equation (3e).

Vuu (@ energization pattern P3, P4) = + B (3e)
When the drive unit 9 drives the motor 3 using the energization pattern P3, the upper arm 5vu of the V phase is turned on, so that the node voltage Vnv becomes the power supply voltage + B. When the drive unit 9 drives the motor 3 using the energization pattern P4, the upper arm 5vw of the W phase is turned on, so that the node voltage Vnw becomes the power supply voltage + B. Thereby, when the drive part 9 drives the motor 3 using each of the energization patterns P3 and P4, the drain-source voltages Vvu and Vwu of the upper arms 5vu and 5wu of the U phase and the W phase are expressed by the equation (3f), ( 3g) expressed as shown in the equation.

Vvu (@ energization pattern P3) = 0 (3f)
Vwu (@ electrification pattern P4) = 0 ... (3g)
If the drive unit 9 uses the energization patterns P3 and P4 and determines that the relationship of these equations (3a), (3b), (3f), and (3g) is satisfied, the drive unit 9 stores “OFF” in the storage unit 11.

  On the other hand, a case is considered in which one of the load lines 2 of a predetermined phase N (for example, U phase) is disconnected from among the load lines 2 toward the U, V, and W phase motors 3. When the drive unit 9 drives the motor 3 using the energization patterns P2 and P5, as shown in FIG. 9, if the upper arm and the lower arm of the other phases (for example, the V phase and the W phase) of the N phase are turned on, A current Is flows through the sense resistor 8. In this case, the current value Is flowing through the sense resistor 8 becomes a normal value as shown in equation (3h), and the drain-source voltage Vvu of the V-phase upper arm 5vu and the energization pattern P5 are applied when the energization pattern P2 is applied. In this case, the drain-source voltage Vwu of each upper arm 5wu of the W phase also becomes a normal value as shown in the equations (3i) and (3j). See above for normal values.

Is (@ energization pattern P2, P5) = normal value (3h)
Vvu (@ energization pattern P2) = normal value (3i)
Vwu (@ energization pattern P5) = normal value (3j)
When the drive unit 9 drives the motor 3 by applying the energization patterns P2 and P5, the drive unit 9 stores “positive” when it is determined that the relationship of the expressions (3h) to (3j) is satisfied.

  Although the case where the U phase is disconnected is illustrated here, the same applies to the case where the V phase is disconnected and the W phase is disconnected. And the drive part 9 can determine with the disconnection of the load line 2 in any one of U phase-W phase by collating with the abnormality kind correspondence table 15 shown in FIG. 5 in step S10, and, thereby, U phase-W phase It can be determined that one of the load lines 2 is disconnected. This phase can also be discriminated.

<When load line 2 is short-circuited, so-called power fault>
A case where a load line 2 of a predetermined phase N (for example, U phase) among the load lines 2 directed to the coils of the U, V, W phase motor 3 is short-circuited to the high potential side power supply line N1, that is, a so-called power fault. Consider. When the drive unit 9 drives the motor 3 using the energization patterns P3 and P4, as shown in FIG. 10, when the drive unit 9 turns on the U-phase lower arm 5ud, a short-circuit current is passed through the motor 3. And flows to the sense resistor 8. At this time, the current value Is flowing through the sense resistor 8 is expressed by equation (4a).

Is (@ energization pattern P3, P4) ＋ + B / (Ron + Rs) (4a)
This current value Is is significantly higher than the normal value of the equation (1a). When applying the energization patterns P <b> 3 and P <b> 4, the drive unit 9 stores “heaven” in the storage unit 11 based on the current value in step S <b> 7. And the drive part 9 can be collated with the abnormality kind correspondence table | surface 15 in step S10, and can determine with a power supply short circuit. These are the same even when the V-phase and W-phase load wires 2 are short-circuited to the power source.

  For example, when the U-phase load line 2 is short-circuited to the high potential side power supply line N1, when the drive unit 9 drives the motor 3 using the energization patterns P0, P1, P2, and P5, FIG. As shown, if the lower arms 5wd and 5vd of the W-phase or V-phase are turned on, a current flows through the sense resistor 8 via the motor 3. At this time, the current value Is flowing through the sense resistor 8 is expressed by the equation (4b).

Is ∝ + B / (Ron + ZL + Rs) (4b)
The current value Is shown in the equation (4b) is close to the normal value shown in the equation (1a), but the value is different. For this reason, it may be regarded as a normal value or an abnormal value “heaven” according to the setting of the threshold value. That is, the drive unit 9 stores “positive” in the storage unit 11 when it is determined to be a normal value in step S <b> 7, and stores “celestial” in the storage unit 11 when it is determined as an abnormal value. Thereafter, the drive unit 9 determines that the power supply is short-circuited by checking with the abnormality type correspondence table 15 in step S10. That is, the drive unit 9 may determine that the power supply is short-circuited by using the value shown in the equation (4b) as an auxiliary.

<When load line 2 is grounded, so-called ground fault>
Further, a case where a predetermined phase N (for example, the U phase) of the load lines 2 directed to the coils of the U, V, and W phase motor 3 is ground-grounded, that is, a so-called ground fault is considered. When the drive unit 9 drives the motor 3 using the energization pattern P0, as shown in FIG. 12, the U-phase upper arm 5uu is turned on, so that the short-circuit current does not pass through the motor 3 and the U-phase upper arm 5uu Flowing. However, since no current flows through the sense resistor 8, the current value Is is expressed by the equation (5a).

Is (@ energization pattern P0, P1) = 0 (5a)
Further, the current IMon flowing through the upper arm 5uu of the U phase is expressed by the equation (5b).
IMon1 ∝ + B / Ron (5b)
Therefore, when the current IMon flows through the U-phase upper arm 5uu as shown in the equation (5b), the voltage drop due to the ON resistance Ron of the U-phase upper arm 5uu increases, and the detection voltage Vuu of the node by the detection unit 10 becomes As shown in equation (5c).

Vuu ∝ Ron × IMon1
≒ + B ... (5c)
At this time, an excessive current is applied to the upper arm 5uu of the U-phase, but when the drive unit 9 applies the energization pattern P0 and the voltage of the expression (5c) is detected by the detection unit 10, the step S7 The “ground” is stored in the storage unit 11. This operation is the same even when the drive unit 9 drives the motor 3 by applying the energization pattern P1. And the drive part 9 can be collated with the abnormality kind correspondence table | surface 15 in step S10, and can determine with a power supply short circuit. These are the same even when the V-phase and W-phase load wires 2 are short-circuited to the ground.

  Note that a case where a predetermined phase N (for example, U phase) of the load lines 2 toward the coils of the U, V, W phase motor 3 is short-circuited to the ground is considered. When the drive unit 9 drives the motor 3 using the energization pattern P5, as shown in FIG. 13, when the upper arm 5wu of the other phase (for example, W phase) of the N phase is turned on, the short circuit current is changed to the upper arm 5wu of the W phase. And flows through the motor 3. However, since no current flows through the sense resistor 8, the current value Is is expressed by the equation (5d).

Is = 0 (5d)
However, the current IMon2 flowing through the upper arm 5wu is expressed by the equation (5e).
IMon2∝ + B / (Ron + ZL) (5e)
Therefore, when the current IMon2 flows through the upper arm 5wu of the W phase as shown in the equation (5e), the voltage drop due to the ON resistance Ron of the upper arm 5wu of the W phase increases, and the detection voltage Vwu by the detection unit 10 becomes (5f ) As shown in the equation.

Vwu ∝ Ron × IMon2
= + B * Ron / (Ron + ZL) (5f)
The voltage value Vwu shown in the equation (5f) is close to the normal value shown in the equation (1b), but the value is different. For this reason, the drive unit 9 may determine that the abnormal value is “ground” even if it is regarded as a normal value according to the setting of the threshold value. That is, the drive unit 9 stores “positive” in the storage unit 11 when determined to be a normal value in step S <b> 7, and stores “ground” in the storage unit 11 when determined as an abnormal value. These operations are the same when the drive unit 9 drives the motor 3 using the energization patterns P2 to P4. Thereafter, the drive unit 9 determines that the power supply is short-circuited by checking with the abnormality type correspondence table 15 in step S10. That is, the drive unit 9 may determine that the power supply is short-circuited by using the value shown in the equation (5f) as an auxiliary.

<When load line 2 is short-circuited between phases>
In addition, the processing when the load line 2 directed to the coil of the U, V, W phase motor 3 is short-circuited between phases, that is, U phase-V phase short circuit, V phase-W phase short circuit, or W phase-U phase short circuit. Consider. For example, when the N-phase (for example, U phase) and M-phase (for example, V phase) load lines 2 are short-circuited, and the drive unit 9 drives the motor 3 using the energization pattern P0, the U-phase upper arm 5uu At the same time, the lower arm 5vd of the V phase is turned on. At this time, as shown in FIG. 14, a short-circuit current flows through the upper arm 5uu and the lower arm 5vd without passing through the motor 3. At this time, the current value Is flowing through the sense resistor 8 is expressed by the equation (6a).

Is ∝ + B / (2Ron + Rs) (6a)
Therefore, for example, when the current IMon flows through the upper arm 5uu of the U phase equally with the sense current Is of the equation (6a), the detection voltage Vuu by the detection unit 10 becomes (with the voltage drop due to the ON resistance Ron of the upper arm of the U phase) 6b) As shown in the equation.

Vuu ∝ Ron × IMon
= + B × Ron / (2Ron + Rs) (6b)
This is the same when the U-phase lower arm 5ud is turned on and the V-phase upper arm 5vu is turned on in the energization pattern P3. When the driving unit 9 applies the energization patterns P0 and P3 to drive the motor 3, the detection unit 10 sets the sense current Is to an overcurrent that is equal to or greater than the threshold based on the signal acquired in step S7 and the equation (6a). Is quickly stored in the storage unit 11, and when the detection unit 10 detects that the drain source voltage Vuu of the upper arm 5 uu is smaller than a predetermined value based on the equation (6b), “ground” is stored in the storage unit 11. Remember me.

  When the N-phase (for example, U phase) and M-phase (for example, V phase) load lines 2 are short-circuited, and when the drive unit 9 drives the motor 3 using the energization pattern P5, for example, the W-phase upper arm 5wu Is turned on and the lower arm 5vd of the V phase is turned on. At this time, as shown in FIG. 15, a short-circuit current flows through the motor 3, the upper arm 5wu, and the lower arm 5vd. At this time, the current value Is flowing through the sense resistor 8 becomes a normal value as shown in the equation (6c).

Is = normal value (6c)
Even when the energization pattern P4 is applied, the U-phase lower arm 5ud is turned on and the W-phase upper arm 5wu is turned on, so that the current value Is is the same as that in the equation (6c). Even when the energization pattern P1 is applied, the U-phase upper arm 5uu is turned on and the W-phase lower arm 5wd is turned on, resulting in the same current value Is. Even when the energization pattern P2 is applied, the V-phase upper arm 5vu is turned on and the W-phase lower arm 5wd is turned on, so that the same current value Is is obtained.

  Therefore, when the drive unit 9 drives the motor 3 by applying the energization patterns P1, P2, P4, and P5, “positive” is stored in the storage unit 11 in step S7. And the drive part 9 can conclude with a short circuit between phases by collating with the abnormality kind correspondence table | surface 15 in step S10.

  As described above, according to the present embodiment, the drive unit 9 of the control circuit 4 uses the signals (for example, voltage or / and current) detected, measured, and acquired in the abnormality determination mode as signal stages “positive”, “ Determination ”,“ heaven ”, and“ ground ”are determined, and the determination result is compared with the abnormality type correspondence table 15 stored in the storage unit 11 to determine the abnormality type. Can be determined. Note that the type of abnormality may be determined by comparing and collating the signal (for example, voltage or / and current) with the abnormality type correspondence table 15.

  The drive unit 9 of the control circuit 4 is configured so that each of the switches 5uu, 5ud, 5vu, 5vd, 5wu, Since 5 wd is driven and controlled, the type of abnormality can be determined for each phase.

  Further, the drive unit 9 of the control circuit 4 drives and controls the switches 5uu, 5ud, 5vu, 5vd, 5wu, and 5wd of the three-phase bridge circuit 7 based on six predetermined energization patterns P0 to P5. Therefore, the abnormality type can be determined based on the energization states in all the energization patterns P0 to P5, and the reliability of the abnormality type determination process can be improved.

  When the drive unit 9 of the control circuit 4 determines the type of abnormality, it notifies the external engine ECU 13 as a diagnosis. Then, the engine ECU 13 can perform various abnormal processes (for example, stop operation) in response to this notification, and can notify the outside (user) by turning on and blinking a warning lamp (not shown).

  The drive unit 9 of the control circuit 4 repeats the application and stop of the energization pattern Pi a plurality of times to determine the abnormality type, thereby improving the reliability of the abnormality type determination. If the current threshold is set within the safe operating area (SOA) of all the switches 5uu, 5ud, 5vu, 5vd, 5wu, 5wd, energization can be stopped before overcurrent flows in the short circuit phase, It is possible to determine the type of abnormality while preventing destruction of all the switches 5uu, 5ud, 5vu, 5vd, 5wu, and 5wd.

  The drive unit 9 of the control circuit 4 is connected to the disconnection of the load line 2, the short circuit to the high potential side power supply line N1, the short circuit to the low potential side power supply line N2 of the load line 2, the coil of the motor 3 or the coil of the motor 3 All types of abnormalities of short-circuiting of the extended load line 2 can be determined.

(Second Embodiment)
16 and 17 show additional explanatory views of the second embodiment. The difference from the first embodiment is that the energization pattern is changed. Hereinafter, a description will be given centering on differences from the first embodiment.

  FIG. 16 shows energization patterns P10 to P12 recorded in the energization pattern table 114. In the energization pattern P10, the U-phase upper arm 5uu is PWM driven, the lower arm 5ud is / PWM driven, and the V-phase lower arm 5vd is fully turned on. Note that “/ PWM” in FIG. 16 indicates the negative logic of “PWM”, “PWM” and “/ PWM” indicate that they are driven in opposite phases, and “ON” indicates that they are ON for the entire period.

  That is, the energization pattern P10 shows a pattern in which the U-phase leg 6u is complementarily switched on and off according to the PWM signal while the V-phase lower arm 5vd is turned on for the entire period. Similarly, the energization pattern P11 indicates a pattern in which the V-phase leg 6v is complementarily switched on and off according to the PWM signal while the lower arm 5wd of the W-phase is turned on for the entire period. Similarly, the energization pattern P12 indicates a pattern in which the W-phase leg 6w is complementarily switched on and off according to the PWM signal while the U-phase lower arm 5ud is turned on for the entire period.

FIG. 17 shows the abnormality type correspondence table 115. In the abnormality type correspondence table 115 of the present embodiment, the energization state at the time of the phase short-circuit abnormality is not recorded.
Since the energization pattern P10 is energization between the U phase and the V phase, an abnormal type identification code “disconnection” is generated in the U phase and the V phase at the time of disconnection, and a normal current flows in the W phase regardless of this energization. Therefore, the abnormality type identification code “positive” and the abnormality type correspondence table 115 are recorded. Similarly, when the power supply is short-circuited, so-called power fault, the U-phase and V-phase are recorded in the abnormal type identification table 115 because the abnormal type identification code is “heaven” and the W-phase is not related to this energization. Yes. Further, when the ground is short-circuited, that is, when a ground fault occurs, a short-circuit current flows when the upper arm 5uu of the U-phase is turned on. Therefore, the abnormal type identification code “Ground” is recorded in the U-phase. Since it is not related, “−” is recorded in the abnormality type correspondence table 115. Since the energization patterns P11 and P12 are the same, description thereof is omitted.

  The drive unit 9 determines the signal stages “positive”, “off”, “heaven”, and “ground” according to the signal (for example, voltage or / and current) acquired by the detection unit 10. The drive unit 9 can discriminate the abnormality type by comparing this signal stage with the abnormality type identification code of the abnormality type correspondence table 115. Thereby, there exists an effect similar to the above-mentioned embodiment.

(Third embodiment)
18 and 19 show additional explanatory views of the third embodiment. A different part from 1st and 2nd embodiment exists in the place which changed the electricity supply pattern. Hereinafter, a description will be given centering on differences from the first embodiment.

  FIG. 18 shows an example of the energization pattern table 214. The energization pattern P20 shows a pattern in which the U-phase leg 6u is complementarily switched on and off according to the PWM signal while the V-phase lower arm 5vd is turned on for the entire period. The energization pattern P21 shows a pattern in which the U-phase leg 6u is complementarily switched on and off according to the PWM signal while the lower arm 5wd of the W-phase is turned on for the entire period.

  Similarly, the energization pattern P22 shows a pattern in which the V-phase leg 6v is complementarily switched on and off according to the PWM signal while the lower arm 5wd of the W-phase is turned on for the entire period. Similarly, the energization pattern P23 indicates a pattern in which the V-phase leg 6v is complementarily switched on and off according to the PWM signal while the U-phase lower arm 5ud is turned on for the entire period. Similarly, the energization pattern P24 indicates a pattern in which the W-phase leg 6w is complementarily switched on and off according to the PWM signal while the U-phase lower arm 5ud is turned on for the entire period. Similarly, the energization pattern P25 indicates a pattern in which the W-phase leg 6w is complementarily switched on and off according to the PWM signal while the V-phase lower arm 5vd is turned on for the entire period. That is, the energization patterns P20 to P25 shown in the third embodiment are patterns that are added and expanded to the energization patterns P10 to P12 of the second embodiment.

  FIG. 19 shows an abnormality type correspondence table 215. Hereinafter, a case where the energization patterns P20 and P23 are applied will be described as an example. The same applies when other energization patterns P21, P22, P24, and P25 are applied.

  Since the energization patterns P20 and P23 are energization between the U phase and the V phase, the abnormality type identification code “disconnection” is recorded in the storage unit 11 for the U phase and the V phase at the time of disconnection. In addition, since a normal current flows in the W phase regardless of this energization, the abnormality type identification code “positive” is recorded in the storage unit 11.

  In addition, when the energization patterns P20 and P23 are applied, the abnormality type identification code “heaven” is recorded in the storage unit 11 in the U-phase and V-phase fields in the same way when the power supply is short-circuited, so-called power failure. Further, since the W-phase column is not related to this energization, “−” is recorded in the storage unit 11.

  For example, if the U phase is grounded, that is, a so-called ground fault, a short circuit current flows when the upper arm 5uu of the U phase is turned on by applying the energization pattern P20. For this reason, the abnormal type identification code “ground” is recorded in the storage unit 11 in the U phase. Further, since the V phase and the W phase are not related to the energization, “−” is recorded in the storage unit 11.

  For example, if the V phase is ground-grounded, that is, a so-called ground fault, a short-circuit current flows when the energization pattern P23 is applied and the upper arm 5uv of the V phase is turned on. For this reason, the abnormality type identification code “ground” is recorded in the storage unit 11 in the V phase. Further, since the U phase and the W phase are not related to this energization, “−” is recorded in the storage unit 11.

  Further, for example, when the coils of the U-phase and V-phase motors 3 or their load wires 2 are short-circuited, the energization patterns P20 and P23 are applied, and the U-phase and V-phase upper arms 5uu and 5vu and the lower arm 5ud. A short-circuit current flows when 5vd is turned on. For this reason, “heaven” or “earth” is recorded in the storage unit 11 in the U-V phase. Further, since the V-W phase and the W-U phase are not related to this energization, “-” is recorded in the storage unit 11. These are the same for the energization patterns P21, P22, P24, and P25, but the description thereof is omitted.

  The drive unit 9 determines the signal stages “positive”, “off”, “heaven”, and “ground” according to a signal (for example, voltage or / and current) acquired by the detection unit 10. At this time, the determination is made in the same manner as the method described in the first or second embodiment. Then, the drive unit 9 can determine the abnormality type by comparing this signal stage with the abnormality type identification code of the abnormality type correspondence table 215. Thereby, there exists an effect similar to the above-mentioned embodiment.

(Fourth embodiment)
20 and 21 show additional explanatory views of the fourth embodiment. The difference from the first to third embodiments is that the energization pattern is changed. Hereinafter, a description will be given centering on differences from the first to third embodiments.

  FIG. 20 shows an example of the energization pattern table 314. The energization pattern P30 shows a pattern in which the U-phase leg 6u is complementarily switched on and off in accordance with the PWM signal while the V-phase leg 6v is complementarily switched on and off in accordance with the PWM signal. The energization pattern P31 shows a pattern in which the U-phase leg 6u is complementarily turned on / off according to the PWM signal so that the short-circuit current does not flow while the W-phase leg 6w is complementarily switched on / off according to the PWM signal. ing. Similarly, the energization pattern P32 is a pattern in which the V-phase leg 6v is complementarily switched on and off according to the PWM signal so that the short-circuit current does not flow while the W-phase leg 6w is complementarily switched on and off. Since the energization patterns P33 to P35 are reverse phase patterns of the energization patterns P30 to P32, description thereof is omitted.

  FIG. 21 shows an abnormality type correspondence table 315. Hereinafter, a case where the energization patterns P30 and P33 are applied will be described as an example. The same applies when other energization patterns P31, P32, P34, and P35 are applied.

  Since the energization patterns P30 and P33 are energization between the U phase and the V phase, the abnormality type identification code “disconnection” is stored in the storage unit 11 for the U phase and the V phase at the time of disconnection. In addition, since a normal current flows in the W phase regardless of this energization, the abnormality type identification code “positive” is recorded in the storage unit 11. In addition, when the power supply is short-circuited, that is, a so-called power fault, a short-circuit current flows when the lower arm 5ud or 5vd of either the U phase or the V phase is turned on. For this reason, the abnormality type identification code “heaven” is stored in the storage unit 11 for the U phase and the V phase. Further, since the W phase is not related to this energization, “−” is recorded in the storage unit 11. In the case of a ground short-circuit, that is, a so-called ground fault, a short-circuit current flows when either the U-phase or V-phase upper arm 5uu, 5vu is turned on. For this reason, the abnormality type identification code “ground” is recorded in the storage unit 11 for the U phase and the V phase. Further, since the W phase is not related to this energization, “−” is recorded in the storage unit 11.

  For example, when the coils of the U-phase and V-phase motors 3 or their load wires 2 are short-circuited, the energization patterns P30 and P33 are applied and the U-phase and V-phase upper arms 5uu and 5vu and the lower arms 5ud, A short-circuit current flows when 5vd is turned on. For this reason, the abnormality type identification codes “heaven” and “ground” are recorded in the storage unit 11 in the U-V phase. In addition, since it is assumed that a normal current flows in the VW phase and the WU phase regardless of the energization, the abnormality type identification code “positive” is recorded in the storage unit 11. These are the same for the energization patterns P31, P32, P34, and P35, but the description is omitted. Since the abnormality type identification code “positive” may change according to the threshold value as described in the first embodiment, other abnormality type identification code or “−” may be recorded. That is, “heaven”, “ground”, “cut”, or “−” may be recorded in accordance with the setting threshold value.

  The drive unit 9 determines the signal stages “positive”, “off”, “heaven”, and “ground” according to the signal (for example, voltage or / and current) acquired by the detection unit 10. At this time, the determination is made in the same manner as the determination process shown in any of the first to third embodiments. The drive unit 9 of the control circuit 4 can discriminate the abnormality type by comparing this signal stage with the abnormality type identification code of the abnormality type correspondence table 315. Thereby, there exists an effect similar to the above-mentioned embodiment.

(Fifth embodiment)
FIG. 22 shows an additional explanatory diagram of the fifth embodiment. The difference from the first to fourth embodiments is the voltage detection method. Hereinafter, a description will be given centering on differences from the first embodiment.

As shown in FIG. 22, a motor controller 401 that replaces the motor controller 1 includes a driver IC 405. This driver IC 405 is configured by connecting a sense resistor 408 to the high potential side power supply line N1 side, and by detecting the terminal voltage Vs2 of this sense resistor 408, the current flowing through the sense resistor 408 can be detected. Yes. Since other electrical configurations are the same as those in FIG. 1 described in the first embodiment, description thereof is omitted. By configuring the abnormality type correspondence table in the storage unit 11 using the voltage Vs2 or the current flowing through the sense resistor 408 as a parameter, the drive unit 9 can determine the abnormality type described in the above embodiment. Thereby, there exists an effect similar to the above-mentioned embodiment. In addition, since the number of parameters can be increased compared to the above-described embodiment, the type of abnormality can be determined more accurately.
Further, the nodes detected by the detection unit 10 are not limited to the nodes described above, and the detection reliability can be improved by increasing the number of nodes.

(Other embodiments)
The present invention is not limited to the technology according to the above-described embodiment, and for example, the following modifications or expansions are possible. The motor 3 may be a brushless motor or a brush motor. A sensor motor or a sensorless motor may be used.

  Although the control circuit 4 has shown the form which discriminate | determines all types (for example, 4 types, 3 types) of the types of abnormality, it is applicable to the form which discriminate | determines two or more of some of them. The driver ICs 4 and 405 may be configured inside or outside the motor controllers 1 and 401.

Although an N-channel MOS transistor is exemplified as the “switch”, an IGBT or a bipolar transistor may be used as necessary.
Although the configuration in which the current is detected by the single shunt method using the sense resistor 8 or 408 is shown, the configuration in which the sense resistor 8 or 408 is connected for each phase by the three shunt method and the current is detected for each phase is applied. May be. Although the form applied to the three-phase motor 3 is shown, the present invention is not limited to this, and can be applied to a motor exceeding three phases. That is, a motor having a plurality of phases of three or more phases can be applied.

  In the drawings, 1 and 401 are motor controllers (motor drive abnormality type discriminating devices), 2 is a load line, 3 is a motor, 5 and 405 are driver ICs (drive units), 8, and 408 are sense resistors (acquisition units), Reference numeral 10 denotes a detection unit (acquisition unit), 9 denotes a drive unit (discrimination unit, notification unit, stage division unit), and 11 denotes a storage unit.

Claims (8)

A motor drive abnormality type discriminating device (1, 401) for discriminating the type of abnormality occurring in a motor (3) having three or more phases or a load line (2) connected to the motor,
A three-phase or more-phase switch (5uu) connected between a high potential side power supply line (N1) to which a high potential is applied and a low potential side power supply line (N2) to which a low potential lower than the high potential is applied. 5ud, 5vu, 5vd, 5wu, 5wd, 5, 405), and a drive unit (9) for driving and controlling the motor;
An acquisition unit (8, 10, 408) for acquiring a signal generated when the motor is driven and controlled by the drive unit;
An abnormality type correspondence table (15) for recording an energization pattern table (14, 114, 214, 314) for recording a plurality of predetermined energization patterns and an energization state when an abnormality cause occurs corresponding to the energization pattern. , 115, 215, 315), and a storage unit (11),
A discriminator (9) for discriminating the type of drive abnormality of the motor,
When the determination unit determines the drive abnormality type of the motor,
The driving unit drives and controls the switches of the plurality of phases based on a plurality of predetermined energization patterns, and the switches based on a voltage applied between the high potential side power supply line and the low potential side power supply line Through the motor and
A plurality of energization patterns stored in the storage unit and a signal acquired by the acquisition unit corresponding to the plurality of energization patterns or a signal stage in which the signal is evaluated stepwise are displayed in the abnormality type correspondence table. Depending on the collation, at least two or more types of abnormality among the disconnection of the load line, the short circuit to the high potential side power supply line, the short circuit to the low potential side power supply line, the short circuit between the phases of the motor A motor drive abnormality type discriminating device for discriminating an abnormality type. In the motor drive abnormality kind discrimination device according to claim 1,
When the determination unit determines the type of abnormality for each phase of the motor,
The motor drive abnormality type discriminating device that drives and controls the plurality of phase switches based on a predetermined energization pattern so that the type of abnormality can be discriminated for each phase of the motor. In the motor drive abnormality kind discrimination | determination apparatus of Claim 1 or 2,
A motor drive abnormality type determination device including a notification unit (4) that notifies the outside as a diagnosis when the determination unit determines an abnormality type. In the motor drive abnormality type discrimination device according to any one of claims 1 to 3,
When the motor is a three-phase motor, the driving unit includes a three-phase switch,
The drive unit is a motor drive abnormality type discrimination device that drives and controls a three-phase switch based on six predetermined energization patterns. In the motor drive abnormality type discrimination device according to any one of claims 1 to 4,
The signal acquired by the acquisition unit is a motor drive abnormality type discrimination device including a current. In the motor drive abnormality type discrimination device according to any one of claims 1 to 4,
The determination unit is a motor drive abnormality type determination device that repeats the abnormality type determination process a plurality of times. In the motor drive abnormality kind discrimination device according to any one of claims 1 to 6,
All types of abnormalities of disconnection of the load line, short circuit of the load line to the high potential side power supply line, short circuit of the load line to the low potential side power supply line, short circuit between phases of the motor or its load line Motor drive abnormality type discrimination device for discriminating between. In the motor drive abnormality kind discrimination device according to claim 7,
According to the abnormality type correspondence table, according to the value of the signal acquired by the acquisition unit according to the plurality of energization patterns, a normal level, a disconnection level, a power fault level, or a ground fault level. The abnormal type identification code shown is recorded,
A stage division unit (4) that divides the signal acquired by the acquisition unit into the signal stages according to a threshold;
The discriminating unit collates the plurality of predetermined energization patterns and the signal stage by the stage division unit corresponding to the plurality of energization patterns with an abnormality type identification code of a predetermined abnormality type correspondence table. A motor drive abnormality type discriminating device that discriminates an abnormality type with a motor.

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