Engine control device, engine system and vehicle

Abstract

A motor drive device (1) comprises: a performance check unit (3) configured to perform an abnormality check operation for at least one of an upper transistor (M1, M3, and M7), a lower transistor (M2, M4, and M8), and a motor (10) in a state in which a second main electrode is pulled up or pulled down by setting one of a second main electrode pull-down switch (61, 62, and 63) and a second main electrode pull-up switch (51, 52, and 53) to an on state; and a control circuit (3) configured to control a combination of on!off states of the upper transistor, the lower transistor, and a motor relay (M9, M10, and M11) connected to the motor.

Description

Technical field

[0001] The present disclosure relates to motor control devices. State of the art

[0002] Traditionally, brushless DC motors are used in various devices. The brushless DC motor lacks a brushed current transmission mechanism; therefore, the direction of the current supplied to a coil must be reversed according to the rotor's position. A three-phase brushless DC motor is driven by a motor control device comprising half-bridges corresponding to a U-phase, a V-phase, and a W-phase (for example, patent document 1). State-of-the-art document, patent publication

[0003] Patent document 1: Japanese publication no. 2021-40404 Summary of the invention Problems to be solved by the invention

[0004] In the motor control device described above, there is a possibility that a short circuit or an open circuit may occur in the transistors of the half-bridges, and therefore it is necessary to provide a function to check for such a short circuit and an open circuit at startup before performing motor operation.

[0005] The purpose of the present disclosure is to provide an engine control device that can check for anomalies during startup. Means to solve the problem

[0006] For example, a motor control device according to the present disclosure is a motor control device which is configured to control a motor using at least one half-bridge comprising an upper transistor and a lower transistor, and in which the motor can be connected to a node to which the upper transistor and the lower transistor are connected, the motor control device comprising: at least one second main electrode pull-down switch which is configured to be able to pull down a second main electrode corresponding to the node in the upper transistor, comprising a first main electrode which is configured to be able to apply a supply voltage, and a second main electrode pull-up switch which is configured to be able to pull up the second main electrode;a power test unit configured to perform an abnormality test procedure for at least one of the upper transistor, the lower transistor, and the motor in a state in which the second main electrode is pulled up or down by moving one of the second main electrode pull-down switches and the second main electrode pull-up switch to an ON state; and a control circuit configured to control a combination of ON / OFF states of the upper transistor, the lower transistor, and a motor relay connected to the motor, and the power test unit configured to check, at startup, for at least one short circuit and one open circuit of the upper transistor, one short circuit and one open circuit of the lower transistor, one current fault and one ground fault of the motor, and one short circuit and one open circuit of the motor relay. Advantages of the invention

[0007] The motor control device according to the present disclosure can be checked for an anomaly during startup. Brief description of the drawings Fig. Figure 1 is a view illustrating the configuration of an engine system according to an exemplary embodiment of the present disclosure; Fig. Figure 2 is a view illustrating an example of the internal configuration of a motor control device; Fig. 3 is a view that hierarchically illustrates the priority order of the different tests; Fig. 4 is a table that illustrates the sequence of test content in the test procedures performed at startup; Fig. Figure 5 is a view illustrating the operating state of the motor system during short-circuit tests of power supply relays; Fig. Figure 6 is a view illustrating a current that normally flows during the short-circuit tests of the power supply relays; Fig. Figure 7 is a view illustrating the operating state of the motor system during the power supply relay idle tests; Fig. Figure 8 is a view illustrating the operating state of the motor system during a short-circuit test of a first upper transistor; Fig. Figure 9 is a view illustrating the operating state of the motor system during a short-circuit test of a first lower transistor; Fig. Figure 10 is a view illustrating the operating state of the motor system during a short-circuit test of a second upper transistor; Fig. Figure 11 is a view illustrating the operating state of the motor system during a short-circuit test of a second lower transistor; Fig. Figure 12 is a view illustrating the operating state of the motor system during a short-circuit test of a third upper transistor; Fig. Figure 13 is a view illustrating the operating state of the motor system during a short-circuit test of a third lower transistor; Fig. Figure 14 is a view illustrating the operating state of the motor system during an idle test of the first upper transistor; Fig. Figure 15 is a view illustrating the operating state of the motor system during an idle test of the first lower transistor; Fig. Figure 16 is a view illustrating the operating state of the motor system during an idle test of the second upper transistor; Fig. Figure 17 is a view illustrating the operating state of the motor system during an idle test of the second lower transistor; Fig. Figure 18 is a view illustrating the operating state of the motor system during an idle test of the third upper transistor; Fig. Figure 19 is a view illustrating the operating state of the motor system during an idle test of the third lower transistor; Fig. Figure 20 is a view illustrating the operating state of the motor system during a short-circuit test of a motor; Fig. Figure 21 is a view illustrating the operating state of the motor system during a ground fault test of the motor; Fig. Figure 22 is a view illustrating the operating state of the motor system during a short-circuit test of a first motor relay; Fig. Figure 23 is a view illustrating the operating state of the motor system during a short-circuit test of a second motor relay; Fig. Figure 24 is a view illustrating the operating state of the motor system during a short-circuit test of a third motor relay; Fig. Figure 25 is a view illustrating the operating state of the motor system during an idle test of the first motor relay; Fig. Figure 26 is a view illustrating the operating state of the motor system during an idle test of the second motor relay; Fig. Figure 27 is a view illustrating the operating state of the motor system during an idle test of the third motor relay; and Fig. Figure 28 is an exterior view illustrating an example of the configuration of a vehicle in which the engine system is installed. Description of the embodiments

[0008] An illustrative embodiment of the present disclosure is described below with reference to the drawings. <1. Engine system configuration>

[0009] Fig. Figure 1 is a view illustrating the configuration of an engine system 100 according to the exemplary embodiment of the present disclosure. The Fig. The motor system 100 shown in Figure 1 comprises a motor control device 1 and a brushless DC motor (hereinafter simply referred to as the motor) 10. The motor control device 1 is configured to control the motor 10 in three phases (a U-phase, a V-phase and a W-phase).

[0010] The motor control device 1 is a semiconductor component obtained by integrating an internal configuration described below. The motor control device 1 comprises the following external connections for electrical communication: a VB connection (power supply connection), a VCPH connection (charge pump output connection), a VCPL connection (charge pump output connection), a DRN connection (drain connection), a G3H connection (third upper gate output connection), an S3H connection (third upper source connection), a GR3 connection (third gate connection of the relay), a G3L connection (third lower gate output connection), and an S3L connection (third lower source connection).

[0011] The motor control device 1 also includes as external connections a G2H connection (second upper gate output connection), an S2H connection (second upper source connection), a GR2 connection (second relay gate connection), a G2L connection (second lower gate output connection) and an S2L connection (second lower source connection).

[0012] The motor control device 1 also includes as external connections a G1H connection (first upper gate output connection), an S1H connection (first upper source connection), a GR1 connection (first relay gate connection), a G1L connection (first lower gate output connection) and an S1L connection (first lower source connection).

[0013] The motor control device 1 also includes as external connections an AIN3P connection (third positive input connection for current measurement), an AIN3N connection (third negative input connection for current measurement), an AIN2P connection (second positive input connection for current measurement), an AIN2N connection (second negative input connection for current measurement), an AIN1P connection (first positive input connection for current measurement) and an AIN1N connection (first negative input connection for current measurement).

[0014] The motor system 100 comprises a first half-bridge 1HB corresponding to the U-phase of motor 10, a second half-bridge 2HB corresponding to the V-phase of motor 10, and a third half-bridge 3HB corresponding to the W-phase of motor 10. The first, second, and third half-bridges 1HB, 2HB, and 3HB are arranged outside the motor control device 1.

[0015] The first half-bridge 1HB comprises a first upper transistor (U-phase upper transistor) M1, a first lower transistor (U-phase lower transistor) M2, and a first shunt resistor Rsh1. The first upper transistor M1 and the first lower transistor M2 are each implemented as n-channel MOSFETs (metal-oxide-semiconductor field-effect transistors). The drain of the first upper transistor M1 is connected to terminal DRN. The source of the first upper transistor M1 is connected to the drain of the first lower transistor M2. The source of the first lower transistor M2 is connected to one end of the first shunt resistor Rsh1. The other end of the first shunt resistor Rsh1 is connected to the application end of a ground potential.

[0016] The second half-bridge 2HB comprises a second upper transistor (V-phase upper transistor) M3, a second lower transistor (V-phase lower transistor) M4, and a second shunt resistor Rsh2. The second upper transistor M3 and the second lower transistor M4 each use an n-channel MOSFET. The drain of the second upper transistor M3 is connected to terminal DRN. The source of the second upper transistor M3 is connected to the drain of the second lower transistor M4. The source of the second lower transistor M4 is connected to one end of the second shunt resistor Rsh2. The other end of the second shunt resistor Rsh2 is connected to the application end of ground potential.

[0017] The third half-bridge 3HB comprises a third upper transistor (W-phase upper transistor) M7, a third lower transistor (W-phase lower transistor) M8, and a third shunt resistor Rsh3. Both the third upper transistor M7 and the third lower transistor M8 are N-channel MOSFETs. The drain of the third upper transistor M7 is connected to the DRN terminal. The source of the third upper transistor M7 is connected to the drain of the third lower transistor M8. The source of the third lower transistor M8 is connected to one end of the third shunt resistor Rsh3. The other end of the third shunt resistor Rsh3 is connected to the application end of ground potential.

[0018] Each of the shunt resistors Rsh1, Rsh2 and Rsh3 is a current sensing unit designed to convert a current into a voltage signal in order to detect the current.

[0019] The motor 10 comprises a stator containing a first coil L1 of the U-phase, a second coil L2 of the V-phase, and a third coil L3 of the W-phase. The motor 10 includes a rotor (not shown) configured to contain a magnet and to be rotatable relative to the stator.

[0020] The motor system 100 comprises a first motor relay M9 corresponding to the U-phase, a second motor relay M10 corresponding to the V-phase, and a third motor relay M11 corresponding to the W-phase. Each of the motor relays M9, M10, and M11 is a switch located outside the motor control device 1 and toggles between supplying and blocking current to the motor 10. Each of the motor relays M9, M10, and M11 is configured with an n-channel MOSFET.

[0021] A first node N1, to which the source of the first upper transistor M1 and the drain of the first lower transistor M2 are connected, is connected to the source of the first motor relay M9. The drain of the first motor relay M9 is connected to one end of the first coil L1. A second node N2, to which the source of the second upper transistor M3 and the drain of the second lower transistor M4 are connected, is connected to the source of the second motor relay M10. The drain of the second motor relay M10 is connected to one end of the second coil L2. A third node N3, to which the source of the third upper transistor M7 and the drain of the third lower transistor M8 are connected, is connected to the source of the third motor relay M11. The drain of the third motor relay M11 is connected to one end of the third coil L3. The other ends of coils L1, L2, and L3 are connected together.In this way, a so-called star wiring is formed in motor 10.

[0022] The motor system 100 comprises a first power supply relay M5 and a second power supply relay M6. The power supply relays M5 and M6 are located outside the motor control device 1. Each of the power supply relays M5 and M6 is configured with an n-channel MOSFET and acts as a switch for toggling between supplying and blocking a battery voltage VB to half-bridges HB1, HB2, and HB3. The drain of the first power supply relay M5 is connected to the application end of the battery voltage VB. The source of the first power supply relay M5 is connected to the source of the second power supply relay M6. The drain of the second power supply relay M6 is connected to the drains of the upper transistors M1, M3, and M7.

[0023] The motor system 100 comprises the first resistors R7 and R8, the capacitors C5 and C6, the second resistors R5 and R6, and the diodes D5 and D6, these components being arranged outside the motor control device 1.

[0024] Terminal VCPH is connected to one end of the first resistors R7 and R8. The other ends of the first resistors R7 and R8 are connected to the gates of the power supply relays M5 and M6. Capacitors C5 and C6, the second resistors R5 and R6, and diodes D5 and D6 are connected between the gate and source of power supply relay M5 and between the gate and source of power supply relay M6.

[0025] As in Fig. As illustrated in Figure 2, which is described below, the motor control device 1 includes a charge pump 2. The charge pump 2 increases the battery voltage VB applied to terminal VB to generate a charge pump output voltage VCPH. The charge pump output voltage VCPH is present at terminal VCPH and is applied to one end of the first resistors R7 and R8. When the charge pump 2 is in the ON state, the power supply relays M5 and M6 are ON due to the charge pump output voltage VCPH, and the battery voltage VB is applied to the drains of the upper transistors M1, M3, and M7. Conversely, when the charge pump 2 is in the OFF state, the power supply relays M5 and M6 are OFF. In this case, bidirectional current is blocked by the body diodes of the power supply relays M5 and M6.

[0026] A pre-driver and an external connection for a drive signal output by the pre-driver can be provided in the motor control device 1 corresponding to the power supply relays M5 and M6, and the gates of the power supply relays M5 and M6 can be controlled based on the drive signal output by the external connection. As shown in Fig. In the illustrated configuration 1, however, the VCPH connection is used to drive the power supply relays M5 and M6, making it possible to reduce the number of external connections.

[0027] Capacitors C5 and C6 are used for noise suppression. Resistors R5 and R6 are designed to prevent gate-source voltage instability when power supply relays M5 and M6 are off. Diodes D5 and D6 provide overvoltage protection. Each of the resistors R5 and R6 has a high resistance value to suppress interference when power supply relays M5 and M6 are on.

[0028] As in Fig. As illustrated in Figure 1, the upper transistors M1, M3 and M7, the lower transistors M2, M4 and M8, as well as capacitors, resistors and diodes connected between the gates and sources of the motor relays M9, M10 and M11, are intended for the same purposes as the capacitors C5 and C6, the second resistors R5 and R6 and the diodes D5 and D6.

[0029] A voltage across the first shunt resistor Rsh1 is applied between terminal AIN1P and terminal AIN1N. A voltage across the second shunt resistor Rsh2 is applied between terminal AIN2P and terminal AIN2N. A voltage across the third shunt resistor Rsh3 is applied between terminal AIN3P and terminal AIN3N. <2. Internal configuration of the motor control device>

[0030] Fig. Figure 2 is a view illustrating the internal configuration of the motor control device 1. As shown in Fig. As illustrated in Figure 2, the motor control device 1 comprises the charge pump 2, a control logic unit 3, drivers 41 to 49, pull-up switches 51 to 53, pull-down switches 60 to 63, pull-up resistors 71 to 73, pull-down resistors 80 to 83 and comparators 90 to 93.

[0031] Charge pump 2 generates a charge pump output voltage VCPH to switch on the power supply relays M5 and M6, as described above, as well as to switch on the upper transistors M1, M3, and M7 and the motor relays M9, M10, and M11. The charge pump output voltage VCPH is supplied to the drivers 41, 42, 44, 45, 47, and 48. Charge pump 2 also generates a charge pump output voltage VCPL (< VCPH) to switch the lower transistors M2, M4, and M8 on. The charge pump output voltage VCPL is supplied to the drivers 43, 46, and 49.

[0032] The control logic unit 3 controls the units of the motor system 100. In the present embodiment, the control logic unit 3 is responsible in particular for controlling test procedures, which are described below.

[0033] The driver 41 controls, based on a drive signal from the control logic unit 3, a voltage between the G3H terminal and the S3H terminal, i.e. a voltage between the gate and the source of the third upper transistor M7, and thereby controls the switching on and off of the third upper transistor M7.

[0034] Based on a drive signal from the control logic unit 3, the driver 42 outputs a gate signal from the gate terminal GR3 to the gate of the third motor relay M11, thereby controlling the switching on and off of the third motor relay M11.

[0035] The driver 43 controls, based on a drive signal from the control logic unit 3, a voltage between the G3L terminal and the S3L terminal, i.e. a voltage between the gate terminal and the source terminal of the third lower transistor M8, and thereby controls the switching on and off of the third lower transistor M8.

[0036] The driver 44 controls, based on a drive signal from the control logic unit 3, a voltage between the G2H terminal and the S2H terminal, i.e. a voltage between the gate and the source of the second upper transistor M3, and thereby controls the switching on and off of the second upper transistor M3.

[0037] Based on a drive signal from the control logic unit 3, the pre-driver 45 outputs a gate signal from terminal GR2 to the gate terminal of the second motor relay M10 and thus controls the switching on and off of the second motor relay M10.

[0038] The driver 46 controls, based on a drive signal from the control logic unit 3, a voltage between the G2L terminal and the S2L terminal, i.e. a voltage between the gate terminal and the source of the second lower transistor M4, and thereby controls the switching on and off of the second lower transistor M4.

[0039] The driver 47 controls, based on a drive signal from the control logic unit 3, a voltage between the G1H terminal and the S1H terminal, i.e. a voltage between the gate terminal and the source terminal of the first upper transistor M1, and thereby controls the switching on and off of the first upper transistor M1.

[0040] Based on a drive signal from the control logic unit 3, the pre-driver 48 outputs a gate signal from terminal GR1 to the gate of the first motor relay M9 and thus controls the switching on and off of the first motor relay M9.

[0041] The driver 49 controls, based on a drive signal from the control logic unit 3, a voltage between the G1L terminal and the S1L terminal, i.e. a voltage between the gate and the source of the first lower transistor M2, and thereby controls the switching on and off of the first lower transistor M2.

[0042] The pull-up switches 51 to 53, the pull-down switches 61 to 63, the pull-up resistors 71 to 73 and the pull-down resistors 81 to 83 are intended for the test procedures described below.

[0043] Each of the pull-up switches 51 to 53 is implemented with an n-channel MOSFET. The source of the first pull-up switch 51 is connected to the application end of the battery voltage VB. The drain of the first pull-up switch 51 is connected to one end of the first pull-up resistor 71. The other end of the first pull-up resistor 71 is connected to terminal S1H. In this way, the first pull-up switch 51 and the first pull-up resistor 71 can pull the source of the first upper transistor M1 high.

[0044] Each of the pull-down switches 61 to 63 is implemented with an n-channel MOSFET. The source of the first pull-down switch 61 is connected to the application end of ground potential. The drain of the first pull-down switch 61 is connected to one end of the first pull-down resistor 81. The other end of the first pull-down resistor 81 is connected to terminal S1H. In this way, the first pull-down switch 61 and the first pull-down resistor 81 can pull down the source of the first upper transistor M1.

[0045] The control logic unit 3 drives the gates of the first pull-up switch 51 and the first pull-down switch 61 to control the turning on and off of the first pull-up switch 51 and the first pull-down switch 61.

[0046] The connection relationship of the second pull-up switch 52, the second pull-down switch 62, the second pull-up resistor 72, and the second pull-down resistor 82 to terminal S2H is the same as that of the first pull-up switch 51, the first pull-down switch 61, the first pull-up resistor 71, and the first pull-down resistor 81, so details are omitted. The second pull-up switch 52 and the second pull-up resistor 72 can pull the source of the second upper transistor M3 high, and the second pull-down switch 62 and the second pull-down resistor 82 can pull the source of the second upper transistor M3 low. The control logic unit 3 drives the gates of the second pull-up switch 52 and the second pull-down switch 62 to control the turning on and off of the second pull-up switch 52 and the second pull-down switch 62.

[0047] The connection relationship of the third pull-up switch 53, the third pull-down switch 63, the third pull-up resistor 73, and the third pull-down resistor 83 to terminal S3H is the same as that of the first pull-up switch 51, the first pull-down switch 61, the first pull-up resistor 71, and the first pull-down resistor 81, so details are omitted. The third pull-up switch 53 and the third pull-up resistor 73 can pull the source of the third upper transistor M7 high, and the third pull-down switch 63 and the third pull-down resistor 83 can pull the source of the third upper transistor M7 low. The control logic unit 3 drives the gates of the third pull-up switch 53 and the third pull-down switch 63 to control the turning on and off of the third pull-up switch 53 and the third pull-down switch 63.

[0048] Comparators 90 to 93 are used for the test procedures described below. Comparator 90 compares a voltage at terminal DRN with a reference voltage V90 and outputs the result of the comparison to control logic unit 3. Comparator 91 compares a voltage at terminal S1H with a reference voltage V91 and outputs the result of the comparison to control logic unit 3. Comparator 92 compares a voltage at terminal S2H with a reference voltage V92 and outputs the result of the comparison to control logic unit 3. Comparator 93 compares a voltage at terminal S3H with a reference voltage V93 and outputs the result of the comparison to control logic unit 3. <Prüfvorgänge>

[0049] The following section describes the test procedures performed in motor system 100. These tests are carried out when motor system 100 is started, before motor 10 is put into operation. Specifically, the upper transistors M1, M3, and M7, the lower transistors M2, M4, and M8, the power supply relays M5 and M6, the motor relays M9, M10, and M11, as well as motor 10 itself, can be checked for anomalies.

[0050] Fig. 3 is a view that hierarchically displays the ranking of the different exams. The higher the [number] in Fig. The higher the level shown (3), the higher the priority of the review. Specifically, the short-circuit / open-circuit tests of the power supply relays M5 and M6 are located at the top level, the short-circuit tests of the upper transistors M1, M3 and M7 and the lower transistors M2, M4 and M8 (6-arm FET short-circuit tests) are located at a level below the level of the motor ground fault test 10, the open-circuit tests (6-arm FET open-circuit tests) of the upper transistors M1, M3 and M7 and the lower transistors M2, M4 and M8 as well as the motor short-circuit test 10 are located at a lower level than the level of the motor ground fault test 10, and the short-circuit / open-circuit tests of the motor relays M9, M10 and M11 are located at a lower level than the level of the motor ground fault test 10.

[0051] The in Fig. The hierarchy shown in Figure 3 demonstrates that, in order to correctly perform a test at a specific level, a test at a higher level must first be performed. For example, to correctly perform the short-circuit / open-circuit tests of the motor relays M9, M10, and M11, the tests of the power supply relays, the short-circuit tests of the 6-arm FETs, and the ground fault test of the motor must first be carried out.

[0052] As long as the in Fig. If the priority sequence of tests shown in Figure 3 is followed, all or only some of the test items can be checked. For example, to perform the short-circuit / open-circuit tests of motor relays M9, M10, and M11 described above, the power supply relay tests, the short-circuit tests of the 6-arm FETs, and the motor ground fault test should preferably be performed first. It is not necessary to perform the open-circuit tests of the 6-arm FETs and the motor short-circuit test, thus reducing the test time.

[0053] Fig. Figure 4 is a table illustrating the sequence of test content in the test procedures performed at startup. In the Fig. The four test contents shown are all covered in Fig. The test contents shown in Figure 3 are performed. In particular, the short-circuit tests of the power supply relays M5 and M6, the open-circuit tests of the power supply relays M5 and M6, the short-circuit tests (6-arm FET short-circuit tests) of the transistors M1, M2, M3, M4, M7 and M8, the open-circuit tests (6-arm FET open-circuit tests) of the transistors M1, M2, M3, M4, M7 and M8, the motor short-circuit test 10, the motor ground fault test 10, the short-circuit tests of the motor relays M9, M10 and M11 and the open-circuit tests of the motor relays M9, M10 and M11 are performed in this order, and the results shown in Figure 3 are obtained. Fig. The sequence shown in point 3 is followed.

[0054] In Fig. Figure 4 shows the on and off states of charge pump 2, power supply relays M5 and M6, transistors M1, M2, M3, M4, M7 and M8, and motor relays M9, M10 and M11 for each of the test items. The hatching in Fig. 4 indicates test objectives that correspond to the test content.

[0055] The test procedures are described below for each of the test items in the order they appear in the Fig. The four tests shown are described in detail.

[0056] Fig. Figure 5 is a view illustrating the operating state of motor system 100 during short-circuit tests of power supply relays M5 and M6. To put charge pump 2 into an off state, power supply relays M5 and M6, transistors M1, M2, M3, M4, M7, and M8, and motor relays M9, M10, and M11 are all off. Pull-down switch 60 is set to an on state to pull down the DRN connection. Fig. In Figure 5 and the following figures, dashed arrows indicate the paths for the test objectives, and dashed circles indicate the elements of the test objectives.

[0057] If in the Fig. In the operating state shown in section 5, both power supply relays M5 and M6 are in an off state under normal conditions, as shown in Fig. As shown in Figure 6, a current I flows along a path from the VCPH terminal to the first resistors R7 and R8, to the second resistors R5 and R6, to the body diode of the power supply relay M6, to the DRN terminal, to the pull-down resistor 80, and then to the pull-down switch 60. However, if a short circuit (leak) occurs in each of the power supply relays M5 and M6, the voltage at the DRN terminal corresponds to the battery voltage VB. Therefore, if the reference voltage V90 ( Fig. 2) For the comparator 90, which is set between the voltage at the DRN terminal generated by the current I under normal conditions and the voltage at the DRN terminal during a short circuit, it is possible to perform short-circuit tests of the power supply relays M5 and M6 using the output of the comparator 90.

[0058] Fig. Figure 7 is a view showing the operating state of motor system 100 during no-load tests of the power supply relays M5 and M6. To bring charge pump 2 into an ON state, in this case, power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are in an OFF state. Pull-down switch 60 is moved to an ON state to pull down the DRN connection. According to the in Fig. In the 7 test procedures shown, the charge pump 2 is kept in the on state.

[0059] If in the Fig. In the operating state shown in Figure 7, if both power supply relays M5 and M6 are in the ON state under normal conditions, the voltage at the DRN terminal is the battery voltage VB. However, if an open circuit occurs in at least power supply relay M6 of the power supply relays M5 and M6, the voltage at the DRN terminal is ground potential. Therefore, it is possible to check the open circuit of power supply relays M5 and M6 using the output of comparator 90 ( Fig. 2).

[0060] Fig. Figure 8 is a view illustrating the operating state of motor system 100 during a short-circuit test of the first upper transistor M1. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and the motor relays M9, M10, and M11 are also in an OFF state. The pull-down switch 61 is moved to an ON state to pull down terminal S1H.

[0061] If the first upper transistor M1 in the Fig. In the operating state shown in Figure 8, when the transistor is in the off state under normal conditions, the voltage at terminal S1H is ground potential. However, if a short circuit occurs in the first upper transistor M1, the voltage at terminal DRN is the battery voltage VB. Therefore, the reference voltage V91 for comparator 91 ( Fig. 2) set between the ground potential and the battery voltage VB, and thus it is possible to perform a short circuit test of the first upper transistor M1 using the output of the comparator 91.

[0062] Fig. Figure 9 is a view illustrating the operating state of motor system 100 during a short-circuit test of the first lower transistor M2. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are also in an OFF state. The pull-up switch 51 is moved to an ON state to pull up terminal S1H.

[0063] If the first lower transistor M2 in the Fig. In the operating state shown in Figure 9, when the transistor is in the off state under normal conditions, the voltage at terminal S1H is the battery voltage VB. However, if a short circuit occurs in the first lower transistor M2, the voltage at terminal S1H is ground potential. Therefore, it is possible to perform a short-circuit test of the first lower transistor M2 using the output of comparator 91.

[0064] Fig. Figure 10 shows the operating state of the motor system 100 during a short-circuit test of the second upper transistor M3. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and the motor relays M9, M10, and M11 are also in an OFF state. The pull-down switch 62 is moved to an ON state to pull down terminal S2H.

[0065] If the second upper transistor M3 is in the Fig. In the operating state shown in Figure 10, when the transistor is in the off state under normal conditions, the voltage at terminal S2H corresponds to ground potential. However, if a short circuit occurs in the second upper transistor M3, the voltage at terminal S2H is the battery voltage VB. Therefore, the reference voltage V92 for comparator 92 ( Fig. 2) set between the ground potential and the battery voltage VB, and thus it is possible to perform a short circuit test of the second upper transistor M3 using the output of comparator 92.

[0066] Fig. Figure 11 is a view illustrating the operating state of motor system 100 during a short-circuit test of the second lower transistor M4. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are also in an OFF state. The pull-up switch 52 is moved to an ON state to pull up terminal S2H.

[0067] If the second lower transistor M4 is in the Fig. In the operating state shown in Figure 11, when the transistor is in the off state under normal conditions, the voltage at terminal S2H corresponds to the battery voltage VB. However, if a short circuit occurs in the second lower transistor M4, the voltage at terminal S2H is ground potential. Therefore, it is possible to perform a short-circuit test of the second lower transistor M4 using the output of comparator 92.

[0068] Fig. Figure 12 is a view illustrating the operating state of motor system 100 during a short-circuit test of the third upper transistor M7. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are also in an OFF state. The pull-down switch 63 is moved to an ON state to pull down terminal S3H.

[0069] If the third upper transistor M7 in the Fig. In the operating state shown in Figure 12, when the transistor is in the off state under normal conditions, the voltage at terminal S3H corresponds to ground potential. However, if a short circuit occurs in the third upper transistor M7, the voltage at terminal S3H is the battery voltage VB. Therefore, the reference voltage V93 for comparator 93 ( Fig. 2) set between the ground potential and the battery voltage VB, and thus it is possible to perform a short circuit test of the third upper transistor M7 using the output of comparator 93.

[0070] Fig. Figure 13 shows the operating state of motor system 100 during a short-circuit test of the third lower transistor M8. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are also in an OFF state. The pull-up switch 53 is moved to an ON state to pull up terminal S3H.

[0071] If the third lower transistor M8 in the Fig. In the operating state shown in Figure 13, when the transistor is in the off state under normal conditions, the voltage at terminal S3H corresponds to the battery voltage VB. However, if a short circuit occurs in the third lower transistor M8, the voltage at terminal S3H is ground potential. Therefore, it is possible to perform a short-circuit test of the third lower transistor M8 using the output of comparator 93.

[0072] Fig. Figure 14 shows the operating state of motor system 100 during an idle state of the upper transistor M1. In this case, the power supply relays M5 and M6 are in an ON state, transistor M1 is in an ON state, transistors M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are in an OFF state. The pull-down switch 61 is moved to an ON state to pull down terminal S1H.

[0073] If the first upper transistor M1 in the Fig. In the operating state shown in Figure 14, when the transistor is in the on-state under normal conditions, the voltage at terminal S1H corresponds to the battery voltage VB. However, if the first upper transistor M1 is open-circuited, the voltage at terminal S1H is ground potential. Therefore, it is possible to check the open-circuit condition of the first upper transistor M1 using the output of comparator 91.

[0074] Fig. Figure 15 shows the operating state of motor system 100 during an idle test of the first lower transistor M2. In this case, the power supply relays M5 and M6 are in the ON state, transistor M2 is in the ON state, transistors M1, M3, M4, M7, and M8 are in the OFF state, and motor relays M9, M10, and M11 are in the OFF state. The pull-up switch 51 is moved to the ON state to pull up terminal S1H.

[0075] If the first lower transistor M2 in the Fig. In the operating state shown in Figure 15, when the transistor is in the on state under normal conditions, the voltage at terminal S1H corresponds to ground potential. However, if the first lower transistor M2 is open-circuited, the voltage at terminal S1H is the battery voltage VB. Therefore, it is possible to check the open-circuit condition of the first lower transistor M2 using the output of comparator 91.

[0076] Fig. Figure 16 shows the operating state of motor system 100 during an idle test of the second upper transistor M3. In this case, the power supply relays M5 and M6 are in an ON state, transistor M3 is in an ON state, transistors M1, M2, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are in an OFF state. The pull-down switch 62 is moved to an ON state to pull down terminal S2H.

[0077] If the second upper transistor M3 is in the Fig. In the operating state shown in Figure 16, when the transistor is in the on state under normal conditions, the voltage at terminal S2H is the battery voltage VB. However, when the second upper transistor M3 is open-circuited, the voltage at terminal S2H corresponds to ground potential. Therefore, it is possible to check for an open circuit of the upper transistor M3 using the output of comparator 92.

[0078] Fig. Figure 17 shows the operating state of motor system 100 during an idle test of the second lower transistor M4. In this case, the power supply relays M5 and M6 are in an on state, transistor M4 is in an on state, transistors M1, M2, M3, M7, and M8 are in an off state, and motor relays M9, M10, and M11 are in an off state. The pull-up switch 52 is moved to an on state to pull up terminal S2H.

[0079] If the second lower transistor M4 is in the Fig. In the operating state shown in Figure 17, when the transistor is in the on state under normal conditions, the voltage at terminal S2H corresponds to ground potential. However, if the second lower transistor M4 is open-circuited, the voltage at terminal S2H is the battery voltage VB. Therefore, it is possible to check for an open circuit of the second lower transistor M4 using the output of comparator 92.

[0080] Fig. Figure 18 shows the operating state of motor system 100 during an idle test of the third upper transistor M7. In this case, the power supply relays M5 and M6 are in an on state, transistor M7 is in an on state, transistors M1, M2, M3, M4, and M8 are in an off state, and motor relays M9, M10, and M11 are in an off state. The pull-down switch 63 is moved to an on state to pull down terminal S3H.

[0081] If the third upper transistor M7 in the Fig. In the operating state shown in Figure 18, when the transistor is in the on state under normal conditions, the voltage at terminal S3H corresponds to the battery voltage VB. However, when the third upper transistor M7 is open-circuited, the voltage at terminal S3H corresponds to ground potential. Therefore, it is possible to check the open-circuit condition of the third upper transistor M7 using the output of comparator 93.

[0082] Fig. Figure 19 is a view illustrating the operating state of motor system 100 during an idle state of the lower third transistor M8. In this case, the power supply relays M5 and M6 are in an on state, transistor M8 is in an on state, transistors M1, M2, M3, M4, and M7 are in an off state, and motor relays M9, M10, and M11 are in an off state. The pull-up switch 53 is moved to an on state to pull up terminal S3H.

[0083] If the third lower transistor M8 in the Fig. In the operating state shown in Figure 19, when the transistor is in the on state under normal conditions, the voltage at terminal S3H corresponds to ground potential. However, if the third lower transistor M8 is open-circuited, the voltage at terminal S3H is the battery voltage VB. Therefore, it is possible to check the open-circuit condition of the third lower transistor M8 using the output of comparator 93.

[0084] Fig. Figure 20 is a view illustrating the operating state of the motor system 100 during a short-circuit test of the motor 10. In this case, the power supply relays M5 and M6 are in an ON state, the transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and the motor relays M9, M10, and M11 are in an ON state. The pull-down switches 61, 62, and 63 are moved to the ON state to pull down the terminals S1H, S2H, and S3H.

[0085] If in the Fig. In the operating state shown in Figure 20, if no short circuit occurs in motor 10, all voltages at terminals S1H, S2H, and S3H are ground potential. However, if a short circuit occurs in motor 10, at least one of the voltages at terminals S1H, S2H, and S3H corresponds to the battery voltage VB. Therefore, it is possible to check motor 10 for a short circuit using the outputs of comparators 91, 92, and 93. Fig. Figure 20 shows a case in which a short circuit occurs at the U-phase terminal of motor 10. Since all motor relays M9, M10, and M11 are switched to the ON state, even when one of the motor relays M9, M10, and M11 is idling, at least one of the voltages at terminals S1H, S2H, and S3H corresponds to the battery voltage VB when a short circuit occurs in motor 10.

[0086] Fig. Figure 21 is a view illustrating the operating state of motor system 100 during a motor ground fault test of motor 10. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M3, M4, M7, and M8 are in an OFF state, and motor relays M9, M10, and M11 are in an ON state. Pull-up switches 51, 52, and 53 are switched to an ON state to pull up terminals S1H, S2H, and S3H.

[0087] If in the Fig. In the operating state shown in Figure 21, if no ground fault occurs in motor 10, all voltages at terminals S1H, S2H, and S3H correspond to the battery voltage VB. However, if a ground fault occurs in motor 10, at least one of the voltages at terminals S1H, S2H, and S3H will be ground potential. Therefore, it is possible to perform a ground fault test of motor 10 using the outputs of comparators 91, 92, and 93. Fig. Figure 21 shows a case in which a ground fault occurs at the U-phase connection of motor 10. Since all motor relays M9, M10, and M11 are brought into the ON state, even when no-loading, at least one of the voltages at terminals S1H, S2H, and S3H is at ground potential if a ground fault occurs in motor 10.

[0088] Fig. Figure 22 is a view illustrating the operating state of motor system 100 during a short-circuit test of the first motor relay M9. In this case, the power supply relays M5 and M6 are in an ON state, transistors M1, M2, M4, and M8 are in an OFF state, transistors M3 and M7 are in an ON state, motor relay M9 is in an OFF state, and motor relays M10 and M11 are in an ON state. The pull-down switch 61 is moved to the ON state to pull down terminal S1H.

[0089] If the first motor relay M9 in the Fig. In the operating state shown in section 22, when the motor relay is in the off state, the voltage at terminal S1H is ground potential. However, if a short circuit occurs in the first motor relay M9, the voltage at terminal S1H is the battery voltage VB. Therefore, it is possible to perform a short-circuit test of the first motor relay M9 using the output of comparator 91. Even if an open circuit occurs in one of the motor relays M10 and M11, the voltage at terminal S1H corresponds to the battery voltage VB if a short circuit occurs in the first motor relay M9.

[0090] Fig. Figure 23 shows the operating state of motor system 100 during a short-circuit test of the second motor relay M10. In this case, the power supply relays M5 and M6 are in an ON state, transistors M2, M3, M4, and M8 are in an OFF state, transistors M1 and M7 are in an ON state, motor relay M10 is in an OFF state, and motor relays M9 and M11 are in an ON state. The pull-down switch 62 is moved to an ON state to pull down terminal S2H.

[0091] If the second motor relay M10 is located in the Fig. In the operating state shown in Figure 23, when the motor relay is in the off state under normal conditions, the voltage at terminal S2H is ground potential. However, if a short circuit occurs in the second motor relay M10, the voltage at terminal S2H is the battery voltage VB. Therefore, it is possible to perform a short-circuit test of the second motor relay M10 using the output of comparator 92. Specifically, even if there is no current in one of the motor relays M9 and M11, the voltage at terminal S2H will be the battery voltage VB if a short circuit occurs in the second motor relay M10.

[0092] Fig. Figure 24 shows the operating state of motor system 100 during a short-circuit test of the third motor relay M11. In this case, power supply relays M5 and M6 are in the ON state, transistors M2, M4, M7, and M8 are in the OFF state, transistors M1 and M3 are in the ON state, motor relay M11 is in the OFF state, and motor relays M9 and M10 are in the ON state. Pull-down switch 63 is moved to the ON state to pull down terminal S3H.

[0093] If the third motor relay M11 in the Fig. In the operating state shown in Figure 24, when the third motor relay M11 is in the off state under normal conditions, the voltage at terminal S3H is ground potential. However, if a short circuit occurs in the third motor relay M11, the voltage at terminal S3H is the battery voltage VB. Therefore, it is possible to check the third motor relay M11 for a short circuit using the output of comparator 93. In particular, the voltage at terminal S3H is the battery voltage VB when a short circuit occurs in the third motor relay M11, even if there is an open circuit in one of the motor relays M9 and M10.

[0094] Fig. Figure 25 is a view illustrating the operating state of motor system 100 during an idle state of motor relay M9. In this case, power supply relays M5 and M6 are in an ON state, transistors M1, M2, M4, and M8 are in an OFF state, transistors M3 and M7 are in an ON state, and motor relays M9, M10, and M11 are in an ON state. Pull-down switch 61 is moved to an ON state to pull down terminal S1H.

[0095] If the first motor relay M9 in the Fig. In the operating state shown in Figure 25, when the first motor relay M9 is in the "on" state under normal conditions, the voltage at terminal S1H is the battery voltage VB. However, if the first motor relay M9 is open-circuited, the voltage at terminal S1H is ground potential. Therefore, it is possible to check the open-circuit status of the first motor relay M9 using the output of comparator 91. Even if an open-circuit status occurs in one of the motor relays M10 or M11, the voltage at terminal S1H will still correspond to the battery voltage VB if the first motor relay M9 is functioning normally.

[0096] Fig. Figure 26 shows the operating state of motor system 100 during an idle state of motor relay M10. In this case, power supply relays M5 and M6 are in the ON state, transistors M2, M3, M4, and M8 are in the OFF state, transistors M1 and M7 are in the ON state, and motor relays M9, M10, and M11 are in the ON state. Pull-down switch 62 is moved to the ON state to pull down terminal S2H.

[0097] If the second motor relay M10 is located in the Fig. In the operating state shown in Figure 26, when the second motor relay M10 is in the "on" state under normal conditions, the voltage at terminal S2H is the battery voltage VB. However, if the second motor relay M10 is in an open-circuit state, the voltage at terminal S2H is ground potential. Therefore, it is possible to check the open-circuit state of the second motor relay M10 using the output of comparator 92. Even if an open-circuit state occurs in one of the motor relays M9 and M11, the voltage at terminal S2H will correspond to the battery voltage VB if the second motor relay M10 is functioning normally.

[0098] Fig. Figure 27 shows the operating state of motor system 100 during an idle state of motor relay M11. In this case, power supply relays M5 and M6 are in the ON state, transistors M2, M4, M7, and M8 are in the OFF state, transistors M1 and M3 are in the ON state, and motor relays M9, M10, and M11 are in the ON state. Pull-down switch 63 is moved to the ON state to pull down terminal S3H.

[0099] If the third motor relay M11 in the Fig. In the operating state shown in Figure 27, when the third motor relay M11 is in the "on" state under normal conditions, the voltage at terminal S3H is the battery voltage VB. However, if the third motor relay M11 is in an open-circuit state, the voltage at terminal S3H is ground potential. Therefore, it is possible to check the open-circuit state of the third motor relay M11 using the output of comparator 93. Even if an open-circuit state occurs in one of the motor relays M9 and M10, the voltage at terminal S3H will correspond to the battery voltage VB if the third motor relay M11 is functioning normally.

[0100] In the present embodiment, as described above, short-circuit / open-circuit tests of the power supply relays M5 and M6, short-circuit / open-circuit tests of the transistors M1, M2, M3, M4, M7 and M8, a short-circuit / ground fault test of the motor 10 and short-circuit / open-circuit tests of the motor relays M9, M10 and M11 can be performed at startup.

[0101] In particular, in the present embodiment, each of the on-resistance values ​​of the pull-down switches 60 to 63 and the pull-up switches 51 to 53 used for the test procedures is set higher than each of the on-resistance values ​​of the transistors M1, M2, M3, M4, M7, and M8. When the transistors M1, M2, M3, M4, M7, and M8 are used for pull-down or pull-up, a current can flow through the half-bridges 1HB, 2HB, and 3HB to influence the transistors of the half-bridges or to start the motor 10. Therefore, in the present embodiment, the on-resistance values ​​of the pull-down switches 60 to 63 and the pull-up switches 51 to 53 are set high so that the current flowing during the test procedures is limited.

[0102] In the present embodiment, pull-down resistors 80 to 83 and pull-up resistors 71 to 73 are also provided, further limiting the current flowing during the test procedures. The pull-down resistor and the pull-up resistor can contain a variety of resistive elements connected in series to increase the resistance. If the turn-on resistance values ​​of the pull-down switches 60 to 63 and the pull-up switches 51 to 53 are sufficiently high, the pull-down resistor and the pull-up resistor can be omitted. <4. Application to vehicles>

[0103] Fig. Figure 28 is an exterior view showing an example of the configuration of a vehicle in which the engine system 100 described above is installed. Fig. Figure 28 shows 10 different types of engines X11 to X17, which are installed in the vehicle X, as an example of the application of the engine.

[0104] Motor X11 is an electric power steering motor. Motor X12 is an electric oil pump motor. Motor X13 is a headlight drive motor. Motor X14 is an electric parking brake motor. Motor X15 is a seat cooling blower motor. Motor X16 is a door open / close motor. Motor X17 is a door lock motor. <5. Other>

[0105] In addition to the embodiment described above, various modifications to different technical features, disclosed in this description, can be made without altering the spirit of the invention. In other words, it should be noted that the embodiment is in every respect illustrative and not limiting, and it should be understood that the technical scope of the present invention is not limited to this embodiment and includes all modifications in meaning and scope corresponding to the scope of the claims. <6. Additional remarks>

[0106] As described above, for example, a motor control device (1) according to one aspect of the present disclosure is configured to control a motor using at least one half-bridge (1HB, 2HB and 3HB) comprising an upper transistor (M1, M3 and M7) and a lower transistor (M2, M4 and M8), in which the motor (10) can be connected to a node (N1, N2 and N3) to which the upper transistor and the lower transistor are connected, wherein the motor control device comprises at least one second main electrode pull-down switch (61, 62 and 63) configured to be able to pull down a second main electrode corresponding to the node in the upper transistor, comprising a first main electrode configured to be able to apply a supply voltage (VB), and a second main electrode pull-up switch (51, 52 and 53).which is configured to be able to pull up the second main electrode; a power test unit (3) configured to perform an abnormality test procedure for at least one of the upper transistor, the lower transistor and the motor in a state in which the second main electrode is pulled up or down by moving one of the second main electrode pull-down switches and the second main electrode pull-up switch to an ON state; and a control circuit (3) configured to control a combination of ON / OFF states of the upper transistor, the lower transistor and a motor relay (M9, M10 and M11) connected to the motor, and the power test unit is configured to detect at least one short circuit and one open circuit of the upper transistor, a short circuit and one open circuit of the lower transistor, at startup,To check for a short circuit and a ground fault in the motor, as well as a short circuit and an open circuit in the motor relay (first configuration).

[0107] Preferably, the performance test unit in the first configuration described above is configured to identify an anomaly by performing the following sequence: an upper short-circuit test to check for a short circuit of the upper transistor in a state where the second main electrode is pulled down by the second main electrode pull-down switch; and a lower short-circuit test to check for a short circuit of the lower transistor in a state where the second main electrode is pulled up by the second main electrode pull-up switch; an open-circuit test of the transistor comprising: an upper open-circuit test to check for an open circuit of the upper transistor in the state where the second main electrode is pulled down by the second main electrode pull-down switch;and a lower open-circuit test procedure to check for an open circuit of the lower transistor in the state in which the second main electrode is pulled up by the second main electrode pull-up switch; a ground fault test procedure to check for a ground fault of the motor in the state in which the second main electrode is pulled up by the second main electrode pull-up switch; and a motor relay test procedure to check for a short circuit and an open circuit of the motor relay in the state in which the second main electrode is pulled down by the second main electrode pull-down switch (second configuration).

[0108] Preferably, in the second configuration described above, the motor control device further comprises: a first main electrode pull-down switch (60) which is configured to be able to pull down the first main electrode; and a power supply relay control unit (2) which is configured to control an on / off state of a power supply relay (M5, M6) arranged between the first main electrode and an application end of the supply voltage, wherein the power test unit is configured to test for a short circuit and an open circuit of the power supply relay in a state in which the first main electrode pull-down switch is brought into an on state, and the short circuit and open circuit testing of the power supply relay is performed prior to the transistor short circuit test procedure (third configuration).

[0109] Preferably, in the third configuration described above, the on-resistance value of the first main electrode pull-down switch is higher than either of the on-resistance values ​​of the upper transistor and the lower transistor (fourth configuration).

[0110] Preferably, the motor control device in the third or fourth configuration described above further comprises: a first main electrode pull-down resistor (80) which is configured to be connected in series with the first main electrode pull-down switch (fifth configuration).

[0111] Preferably, in the fifth configuration described above, the first main electrode pull-down resistor is configured to comprise a plurality of series-connected resistor elements (sixth configuration).

[0112] Preferably, the power supply relay in one of the third to sixth configurations described above comprises: Preferably, the power supply relay in one of the third to sixth configurations described above comprises a first n-channel MOSFET (M5) whose drain is connected to the application end of the supply voltage;and a second n-channel MOSFET (M6), which has a source connected to a source of the first n-channel MOSFET and a drain connected to the first main electrode; a first end of a first resistor (R7 and R8), which is provided corresponding to the first n-channel MOSFET and the second n-channel MOSFET, can be connected via an external terminal (VCPH terminal) to an output end of a charge pump (2), which serves as the power supply relay control unit; and a first end of a second resistor (R5 and R6), which is connected between a gate and a source of the first n-channel MOSFET and between a gate and a source of the second n-channel MOSFET, can be connected to a second end of the first resistor (seventh configuration).

[0113] Preferably, in one of the third to seventh configurations described above, the performance test unit is able to perform the short circuit and open circuit test of the power supply relay, the transistor short circuit test, the current short circuit test for the motor, and the short circuit and open circuit test of the motor relay in that order (eighth configuration).

[0114] Preferably, in one of the first to eighth configurations described above, the on-resistance value of the second main electrode pull-down switch is higher than either of the on-resistance values ​​of the upper transistor and the lower transistor, and the on-resistance value of the second main electrode pull-up switch is higher than either of the on-resistance values ​​of the upper transistor and the lower transistor (ninth configuration).

[0115] Preferably, the performance test unit in the ninth configuration described above is configured to perform the test in a state in which the motor is connected to the node (tenth configuration).

[0116] Preferably, in one of the first to tenth configurations described above, the motor control device further comprises: at least one second main electrode pull-down resistor (81, 82 and 83) connected in series with the second main electrode pull-down switch, and a second main electrode pull-up resistor (71, 72 and 73) connected in series with the second main electrode pull-up switch (eleventh configuration).

[0117] Preferably, in the eleventh configuration described above, at least one of the second main electrode pull-down resistor and the second main electrode pull-up resistor is configured to comprise a plurality of series-connected resistance elements (twelfth configuration).

[0118] Preferably, in one of the first to twelfth configurations described above, each of a plurality of motor relays, each being the motor relay, is connected between each of a plurality of input ends provided in the motor and the node in each of a plurality of half-bridges, each being the half-bridge, and when testing for a short circuit and a ground fault of the motor, all of the plurality of motor relays are brought into an ON state (thirteenth configuration).

[0119] Preferably, in one of the configurations described above, each of three or more motor relays, each being the motor relay, is connected between each of the three or more input terminals provided in the motor and the node in each of three or more half-bridges, each being the half-bridge, and when testing for a short circuit of the motor relay, the motor relay under test is switched to an off state, and the remaining motor relays are switched to an on state (fourteenth configuration).

[0120] Preferably, in one of the configurations described above, each of the three or more motor relays, each being the motor relay, is connected between each of three or more input ends provided in the motor and the node in each of three or more half-bridges, each being the half-bridge, and when checking for an idle state of the motor relay, all three or more motor relays are brought into an ON state (fifteenth configuration).

[0121] A motor system (100) according to one aspect of the present disclosure comprises: the motor control device (1) in one of the first to fifteenth configurations described above; and a motor (10) which is configured to be driven by the motor control device (sixteenth configuration).

[0122] A vehicle (X) according to one aspect of the present disclosure comprises: the engine system in the sixteenth configuration (seventeenth configuration). Industrial applicability

[0123] The present disclosure can be used, for example, for engine systems in vehicles. Reference symbol list 1 Motor control device 1HB first half-bridge 2HB second half-bridge 3HB third half-bridge 2 charge pump 3 Control logic unit 10 Motor 41 to 49 drivers 51 first pull-up switch 52 second pull-up switch 53 third pull-up switch 60 pull-down switches 61 first pull-down switch 62 second pull-down switch 63 third pull-down switch 71 first pull-up resistance 72 second pull-up resistor 73 third pull-up resistor 80 pull-down resistor 81 first pull-down resistor 82 second pull-down resistor 83 third pull-down resistor 90 to 93 comparator 100 motor system C5, C6 Capacitor D5, D6 Diode L1 first coil L2 second coil L3 third coil M1 first upper transistor M2 first lower transistor M3 second upper transistor M4 second lower transistor M5 first power supply relay M6 second power supply relay M7 third upper transistor M8 third bottom transistor M9 first motor relay M10 second motor relay M11 third motor relay R5, R6 second resistor R7, R8 first resistor Rsh1 first shunt resistance Rsh2 second shunt resistor Rsh3 third shunt resistor X vehicle QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2021-40404

[0003]

Claims

[1] Motor control device, which is configured to control a motor using at least one half-bridge comprising an upper transistor and a lower transistor and in which the motor can be connected to a node to which the upper transistor and the lower transistor are connected, wherein the motor control device comprises: at least one of a second main electrode pull-down switch, which is configured to be able to pull down a second main electrode corresponding to the node in the upper transistor, comprising a first main electrode which is configured to be able to apply a supply voltage, and a second main electrode pull-up switch which is configured to be able to pull up the second main electrode; a performance test unit configured to perform an abnormality test procedure for at least one of the upper transistor, the lower transistor and the motor in a state in which the second main electrode is pulled up or down by moving one of the second main electrode pull-down switches and the second main electrode pull-up switch to an on state; and a control circuit designed to control a combination of on / off states of the upper transistor, the lower transistor and a motor relay connected to the motor, the performance test unit is designed to check for at least one short circuit and one open circuit of the upper transistor, one short circuit and one open circuit of the lower transistor, one current fault and one ground fault of the motor, and one short circuit and one open circuit of the motor relay during startup. [2] Motor control device according to claim 1, the performance testing unit is set up to identify an anomaly by performing the following sequence: a transistor short-circuit test procedure comprising: an upper short-circuit test procedure for checking for a short circuit of the upper transistor in a state in which the second main electrode is pulled down by the second main electrode pull-down switch; and a lower short-circuit test procedure for checking for a short circuit of the lower transistor in a state in which the second main electrode is pulled up by the second main electrode pull-up switch; comprising an open-circuit test of the transistor: an upper open-circuit test to check for an open circuit of the upper transistor in the state in which the second main electrode is pulled down by the second main electrode pull-down switch; and a lower open-circuit test to check for an open circuit of the lower transistor in the state in which the second main electrode is pulled up by the second main electrode pull-up switch; a short circuit test procedure to check for a short circuit in the motor in the state in which the second main electrode is pulled down by the second main electrode pull-down switch; a ground fault test procedure to check for a ground fault of the motor in the state in which the second main electrode is pulled up by the second main electrode pull-up switch; and a motor relay test procedure to check for a short circuit and an open circuit of the motor relay in the state in which the second main electrode is pulled down by the second main electrode pull-down switch. [3] Motor control device according to claim 2, further comprising: a first main electrode pull-down switch which is configured to be able to pull down the first main electrode; and a power supply relay control unit which is configured to control an on / off state of a power supply relay arranged between the first main electrode and an application end of the supply voltage, wherein the performance test unit is configured to test for a short circuit and an open circuit of the power supply relay in a state in which the first main electrode pull-down switch is brought into an on state, and The short-circuit and open-circuit testing of the power supply relay is performed before the transistor short-circuit test. [4] Motor control device according to claim 3, wherein an on-resistance value of the first main electrode pull-down switch is higher than either of the on-resistance values ​​of the upper transistor and the lower transistor. [5] Motor control device according to claim 3 or 4 further comprising: a first main electrode pull-down resistor, which is designed to be connected in series with the first main electrode pull-down switch. [6] Motor control device according to claim 5, wherein the first main electrode pull-down resistor is configured to comprise a plurality of series-connected resistance elements. [7] Motor control device according to any one of claims 3 to 6, the power supply relay includes: a first n-channel MOSFET whose drain is connected to the application end of the supply voltage; and a second n-channel MOSFET, which has a source connected to a source of the first n-channel MOSFET and a drain connected to the first main electrode, a first end of a first resistor, which is provided according to the first n-channel MOSFET and the second n-channel MOSFET, can be connected via an external connection to an output end of a charge pump, which serves as a power supply relay control unit, and a first end of a second resistor, which is connected between a gate and a source of the first n-channel MOSFET and between a gate and a source of the second n-channel MOSFET, can be connected to a second end of the first resistor. [8] Motor control device according to one of claims 3 to 7, wherein the power test unit is able to perform the short circuit and open circuit testing of the power supply relay, the transistor short circuit test, the ground short circuit test for the motor and the short circuit and open circuit testing of the motor relay in this sequence. [9] Motor control device according to any one of claims 1 to 8, where the on-resistance value of the second main electrode pull-down switch is higher than either of the on-resistance values ​​of the upper transistor and the lower transistor, and The on-resistance value of the second main electrode pull-up switch is higher than either of the on-resistance values ​​of the upper transistor and the lower transistor. [10] Motor control device according to claim 9, wherein the performance test unit is configured to perform the test in a state in which the motor is connected to the node. [11] Motor control device according to any one of claims 1 to 10, further comprising: at least one second main electrode pull-down resistor connected in series with the second main electrode pull-down switch, and a second main electrode pull-up resistor connected in series with the second main electrode pull-up switch. [12] Motor control device according to claim 11, wherein the at least one of the second main electrode pull-down resistor and the second main electrode pull-up resistor is configured to comprise a plurality of series-connected resistance elements. [13] Motor control device according to any one of claims 1 to 12, wherein each of a plurality of motor relays, each being the motor relay, can be connected between each of a plurality of input ends provided in the motor and the node in each of a plurality of half-bridges, each being the half-bridge, and When a short circuit and a ground fault of the motor are checked, all the multiple motor relays are switched to an ON state. [14] Motor control device according to any one of claims 1 to 13, wherein each of three or more motor relays, each being the motor relay, can be connected between each of three or more input ends provided in the motor and the node in each of three or more half-bridges, each being the half-bridge, and When testing for a short circuit in the motor relay, the motor relay under test is switched to an off state, and the other motor relays are switched to an on state. [15] Motor control device according to any one of claims 1 to 14, wherein each of three or more motor relays, each being the motor relay, can be connected between each of three or more input ends provided in the motor and the node in each of three or more half-bridges, each being the half-bridge, and When checking the idle state of the motor relay, all three or more motor relays are switched to the ON state. [16] Engine system, comprising: the motor control device according to any one of claims 1 to 15; and a motor which is designed to be driven by the motor control device. [17] Vehicle, comprising: the motor system according to claim 16.

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