Motor device

Abstract

To provide a motor device capable of maintaining rotating drive even in the switch failure and downsizing and weight saving.SOLUTION: A six-phase winding of A phase, B phase, C phase, D phase, E phase, and F phase is wound around a tooth part (13). A switch inverter part (20) has a first inverter part and a second inverter part. A switch control part controls by pulse drive as a six-phase switched reluctance motor using the first inverter part and the second inverter part when failure of the switch inverter part is not detected and when failure is detected, current output from one corresponding to failure of the first inverter part or the second inverter part is stopped and drives by vector control as a three-phase switched reluctance motor by using the other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a motor device, and more particularly to a motor device for a switched reluctance motor that uses a ferromagnetic material in its rotor. [Background technology]

[0002] Conventionally, in various technological fields, three-phase motors, which can control rotational speed by changing the frequency of alternating current and obtain a stable rotational speed, have been used as power source motor devices. Switched reluctance motors that use ferromagnetic materials in the rotor have also been proposed (see, for example, Patent Document 1).

[0003] In such motor devices, a switch inverter with multiple semiconductor switches is used to supply current to each winding of the motor at the appropriate timing. However, if a semiconductor switch included in the switch inverter fails, it becomes impossible to supply the appropriate power to each winding of the motor, resulting in a problem where the motor cannot continue to rotate. This is particularly undesirable in electric vehicles and hybrid cars that incorporate a motor device as a power source, as the inability to rotate the motor device will impair the vehicle's operation. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2016-103957 [Overview of the project] [Problems that the invention aims to solve]

[0005] To solve this problem, the motor unit can be equipped with multiple rotors and switch inverter units. This allows the remaining switch inverter units to rotate other rotors and continue supplying power even if the semiconductor switch in one of the switch inverter units fails. However, this presents a problem in that it makes it difficult to miniaturize and lighten the motor unit because it requires multiple rotors, which are large in size and weight.

[0006] Therefore, the present invention has been made in view of the above-mentioned conventional problems, and aims to provide a motor device that can continue rotational drive even when a switch fails, and that can be made smaller and lighter. [Means for solving the problem]

[0007] To solve the above problems, the present invention provides a motor device comprising: a rotor rotatably arranged around a rotation axis; a motor section having a stator with a plurality of teeth formed on its inner circumference; a switch inverter section that supplies power to the motor section; and a switch control section that controls each switch included in the switch inverter section, wherein the rotor is made of a ferromagnetic material. And so, The plurality of teeth sections are wound with six-phase windings for phases A, B, C, D, E, and F. The switch inverter section has a first inverter section that supplies current to phases A, C, and E, and a second inverter section that supplies current to phases B, D, and F. The switch control section controls the switch inverter section in normal mode when no fault is detected in the switch inverter section, and controls the switch inverter section in fault mode when a fault is detected in the switch inverter section. The normal mode is achieved by six-phase pulse drive using the first and second inverter sections. As a switched reluctance motor Control is performed, and in the failure mode, the current output from the first inverter unit or the second inverter unit corresponding to the failure is stopped, and the other unit is used for three-phase vector control. As a synchronous reluctance motor It is characterized by performing a drive.

[0008] In such a motor device of the present invention, six-phase windings are provided for one rotor. When a failure is detected in either the first inverter section or the second inverter section, the current output from the failed side is stopped, and the other is used to continue driving by vector control. As a result, it is possible to continue rotational driving even when a switch fails, and it is possible to achieve miniaturization and weight reduction.

[0009] Also, in one aspect of the present invention, in the vector control in the failure mode, when the detected angle at the rotor is θ, θ / 2 is used.

[0010] Also, in one aspect of the present invention, the ratio of the number of poles P of the rotor to the number of slots S of the tooth portion is P:S = 5:6.

[0011] Also, in one aspect of the present invention, one ends of the A phase, the B phase, the C phase, the D phase, the E phase, and the F phase are connected to the neutral point and are star-connected.

[0012] Also, in one aspect of the present invention, the A phase, the B phase, the C phase, the D phase, the E phase, and the F phase are connected in series in a ring shape and are hexagon-connected.

Effects of the Invention

[0013] In the present invention, it is possible to provide a motor device that can continue rotational driving even when a switch fails and can achieve miniaturization and weight reduction.

Brief Description of the Drawings

[0014] [Figure 1] It is a diagram showing an overview of a motor device according to a first embodiment. FIG. 1(a) is a schematic diagram showing a structural example of a motor unit 10, and FIG. 1(b) is a circuit diagram showing a configuration example of a switch inverter unit 20. [Figure 2] It is a timing chart showing the control of the switch inverter unit 20 in the normal mode. [Figure 3]This is a schematic diagram illustrating the normal mode and fault mode operation when the A-phase windings to F-phase windings of the motor unit 10 are connected in a star configuration. [Figure 4] This is a schematic diagram illustrating the normal mode and fault mode operation when the A-phase windings to F-phase windings of the motor unit 10 are connected in a hexagon configuration. [Figure 5] This graph shows the results of a simulation of the torque waveforms in a motor device under normal and faulty modes. [Figure 6] This graph shows the results of a simulation of the line current waveforms for failure modes in a motor device. [Figure 7] These graphs show the simulation results of the phase current waveforms in failure modes in a hexagon connection. Figure 7(a) shows the waveform at 1200 rpm, and Figure 7(b) shows the waveform at 6800 rpm. [Figure 8] These graphs show the results of fast Fourier transforms on the phase current waveforms of failure modes in a hexagon connection. Figure 8(a) shows the results at 1200 rpm, and Figure 8(b) shows the results at 6800 rpm. [Figure 9] These graphs show the results of the Fast Fourier Transform of the phase current phases of failure modes in a hexagon connection. Figure 9(a) shows the results at 1200 rpm, and Figure 9(b) shows the results at 6800 rpm. [Figure 10] This graph shows the results of a simulation of the torque waveform in a failure mode in a hexagon connection. [Modes for carrying out the invention]

[0015] (First Embodiment) Embodiments of the present invention will be described in detail below with reference to the drawings. The same or equivalent components, members, and processes shown in each drawing will be denoted by the same reference numerals, and redundant explanations will be omitted as appropriate. Figure 1 is a diagram showing an overview of the motor device according to this embodiment, Figure 1(a) is a schematic diagram showing an example of the structure of the motor unit 10, and Figure 1(b) is a circuit diagram showing an example of the configuration of the switch inverter unit 20.

[0016] As shown in Figure 1(a), the motor unit 10 of this embodiment includes a rotor 11 that can be arranged around a rotation axis and a stator 12 arranged around the rotor 11. The motor unit 10 also includes an angle detection unit for detecting the rotation angle of the rotor 11 and a current detection unit for detecting the line current of each phase (not shown).

[0017] Furthermore, rotor teeth made of ferromagnetic material are arranged along the outer circumference of the rotor 11. The stator 12 has a core back portion and a plurality of tooth portions 13 formed protruding from its inner circumference. Each tooth portion 13 has windings (coils) 14 for phases A, B, C, D, E, and F wound around it in the circumferential direction for two cycles. Here, the A, E, and C phase windings constitute a first system of three-phase windings, and the D, B, and F phase windings constitute a second system of three-phase windings. The A to F phase windings 14 can be connected using a star connection or a hexagon connection.

[0018] The core back portion is a part that is positioned on the outside of the rotor 11, surrounding the outer circumference of the rotor 11 in a circular shape, with multiple teeth portions 13 protruding at equal intervals from its inner circumference. Known materials can be used for the core back portion, and the materials and structure are not limited. Furthermore, components such as a motor housing are provided separately on the outer circumference of the core back portion.

[0019] The teeth portion 13 is a protruding portion formed from the inner circumferential surface of the core back portion toward the rotor 11. Each teeth portion 13 is formed to be the same length and shape and is arranged at equal intervals, with gaps between each teeth portion 13 forming slots. A winding 14 is wound around each teeth portion 13 and slot, and a magnetic field is generated on the teeth portion 13 when current flows through the winding 14.

[0020] Here, the A-phase, E-phase, and C-phase windings are arranged with a 1 / 3 period difference, forming the first three-phase winding system. Similarly, the D-phase, B-phase, and F-phase windings are also arranged with a 1 / 3 period difference, forming the second three-phase winding system. Figure 1(a) shows an example of a 10-pole, 12-slot switch reluctance motor, where the rotor 11 has 10 rotor teeth and the stator 12 has 12 teeth sections 13. The number of poles P and the number of slots S of the motor section 10 are not limited to 10 poles and 12 slots, but the ratio P:S = 5:6. Also, the winding method of each phase on the teeth section 13 is not limited to concentrated winding, but may be distributed winding.

[0021] As shown in Figure 1(b), the switch inverter unit 20 of this embodiment has a 6-phase inverter configuration in which a first inverter unit 20a and a second inverter unit 20b are connected in parallel between the power supply voltage (+V) and the ground voltage (0V). The switch inverter unit 20 is controlled by a switch control unit (not shown) which controls each switch and supplies current to the windings 14 of the motor unit 10.

[0022] The switch control unit is a calculation unit that processes information according to a predetermined program and controls each part of the motor device, and is implemented by a CPU (Central Processing Unit) or the like. The switch control unit also acquires information from each part of the motor device and performs calculations according to the program. Memory devices, input / output devices, display devices, etc. may be connected to the switch control unit to record programs and data, output and display calculation results, etc. The switch control unit also reads a program recorded on a recording medium and executes the motor device control method of the present invention by executing the program.

[0023] The switch control unit also includes a fault detection unit that detects failures in each switch of the switch inverter unit 20. When all switches are operating normally (no fault detection), the switch control unit controls the switch inverter unit 20 in normal mode, and when a fault is detected in any switch, it controls the switch inverter unit 20 in fault mode. In normal mode, the unit is controlled by pulse drive as a 6-phase switch reluctance motor using the first inverter unit 20a and the second inverter unit 20b (6-phase pulse control). In fault mode, the current output from either the first inverter unit 20a or the second inverter unit 20b corresponding to the fault is stopped, and the other is used to drive the unit as a 3-phase synchronous reluctance motor using vector control (3-phase vector control). A detailed explanation of the normal mode and fault mode will be given later.

[0024] In the example shown in Figure 1(b), the first inverter section 20a and the second inverter section 20b each have reverse current prevention switches 21a to 21d, upper switches 22au to 22fu, lower switches 22al to 22fl, and relay switches 23a to 23f. Each switch has its drain connected to the power supply voltage side (upstream side) and its source connected to the ground voltage side (downstream side). Furthermore, when MOSFETs (Metal-Oxide-Semiconductor Field Effect Transistors) are used as each switch, the equivalent circuit is one in which a parasitic diode is connected in parallel between the source and the drain.

[0025] The reverse current prevention switches 21a to 21d are installed on the power supply voltage side of the first inverter section 20a and the second inverter section 20b, and control the supply of current from the power supply to the first inverter section 20a and the second inverter section 20b, as well as preventing reverse current flow. In the example shown in Figure 1(b), the reverse current prevention switches 21a and 21b are connected in series, with one parasitic diode connected in the forward direction and the other in the reverse direction. Similarly, the reverse current prevention switches 21c and 21d are connected in series, with one parasitic diode connected in the forward direction and the other in the reverse direction. Here, an example of two switches connected in series is shown, but the configuration is not limited as long as it is possible to control the supply of current and prevent reverse current. While an ON signal is applied to the reverse current prevention switches 21a and 21b, current is supplied to the first inverter section 20a, and while an OFF signal is applied, the current to the first inverter section 20a is stopped. Similarly, while an ON signal is applied to the reverse current prevention switches 21c and 21d, current is supplied to the second inverter unit 20b, and while an OFF signal is applied, the current to the second inverter unit 20b is stopped.

[0026] The upper switches 22au~22fu and lower switches 22al~22fl are connected in series to the power supply voltage side and the ground voltage side, respectively, with the drains of relay switches 23a~23f connected in between. Furthermore, the series-connected combinations of upper switches 22au~22fu and lower switches 22al~22fl are connected in parallel to each other. The drains of relay switches 23a~23f are connected in between the series connection of upper switches 22au~22fu and lower switches 22al~22fl, and their sources are connected to the windings 14 of the motor unit 10. Figure 1(b) shows an example using relay switches 23a~23f, but relay switches 23a~23f may be omitted.

[0027] As shown in Fig. 1(b), the combination of the upper switches 22au to 22fu, the lower switches 22al to 22fl, and the relay switches 23a to 23f constitutes the phase A switch to phase F switches for supplying current to the phase A to phase F of the winding 14, respectively. When the switch control unit applies an on signal to the switch group constituting the phase A switch to phase F switches, the line currents I A ~I F are supplied from the sources of the relay switches 23a to 23f to the phase A winding to phase F winding of the motor unit 10.

[0028] As described above, the first inverter unit 20a supplies the line currents I A ,I E ,I C to the phase A winding, phase E winding, and phase C winding, which are the three-phase windings of the first system, respectively. Also, the second inverter unit 20b supplies the line currents I D ,I B ,I F to the phase D winding, phase B winding, and phase F winding, which are the three-phase windings of the second system, respectively. The configuration of the switch inverter unit 20 is not limited to that shown in Fig. 1(b) as long as it can supply the line currents I A ~I F to the three-phase windings of the first system and the second system individually.

[0029] Fig. 2 is a timing chart showing the control of the switch inverter unit 20 in the normal mode. The horizontal axis in Fig. 2 indicates the electrical angle (degrees), and the vertical axis indicates the on signal and off signal applied to each switch. As shown in Fig. 2, in the normal mode, the on signal and off signal are alternately applied to the phase A switch to phase F switches at 180 degrees (π) each. Also, the on signal and off signal of the phase A switch to phase F switches are phase-shifted by 60 degrees (π / 3) each. Also, the phases of phase A and phase D, phase B and phase E, and phase C and phase F are different by 180 degrees (π), and signals inverted with respect to each other are applied. In other words, two three-phase AC signals of phase A, phase C, phase E and phase B, phase D, phase F are applied to the phase A switch to phase F switches.

[0030] Therefore, in normal mode, the switch control unit uses both the first inverter unit 20a and the second inverter unit 20b to supply six-phase pulse currents to the A-phase windings to the F-phase windings, performing six-phase pulse drive control and driving the motor device as a six-phase switch reluctance motor. In other words, the A-phase windings to the F-phase windings are controlled using all of the A-phase switches to the F-phase switches, so that each winding functions as a motor with a total of six phases, each consisting of two three-phase motors.

[0031] In failure mode, the switch control unit stops the current output from whichever of the first inverter unit 20a and the second inverter unit 20b has detected a failure. For example, if the switch control unit detects a failure in the upper switch 22bu, the switch control unit stops the current supply from the second inverter unit 20b and continues the current supply from the first inverter unit 20a. Specifically, it outputs an off signal to all switches included in the second inverter unit 20b (reverse current prevention switches 21c, 21d, upper switches 22bu, 22du, 22fu, lower switches 22bl, 22dl, 22fl, and relay switches 23b, 23d, 23f).

[0032] Furthermore, the switch inverter unit 20 is driven using the other switch, which has not been found to be faulty, with three-phase vector control. In the example where a fault is detected in the upper switch 22bu described above, an ON signal is output to the reverse current prevention switches 21a and 21b of the first inverter unit 20a, and ON and OFF signals are switched and output to the A-phase switch, C-phase switch, and E-phase switch based on three-phase vector control. Here, three-phase vector control detects the current value supplied to each phase of the motor unit 10 and the output of the angle sensor provided in the motor unit 10, and controls the ON / OFF state of each switch using PWM (Pulse Width Modulation) based on the detected angle and current value, and known methods can be used.

[0033] However, the angle used in three-phase vector control is θ / 2, which is half the detected angle θ of the rotor 11 detected by the angle detection unit, and vector control is performed such that the phase current I satisfies the following matrix relationship.

number

[0034] Therefore, in failure mode, the switch control unit uses either the first inverter unit 20a or the second inverter unit 20b to perform three-phase vector control, supplying three-phase PWM current to either the first winding 14 or the second winding 14, thereby driving the motor device as a three-phase synchronous reluctance motor.

[0035] Figure 3 is a schematic diagram illustrating the normal mode and fault mode operation when the A-phase windings to F-phase windings of the motor unit 10 are connected in a star configuration. As shown in Figure 3, in the star configuration, one end of the A-phase windings to F-phase windings is connected to a common neutral point, and the other end is connected to the source of the relay switches 23a to 23f of the switch inverter unit 20. In the normal mode of the star configuration, as shown on the left side of Figure 3, line current I is supplied to the A-phase windings to F-phase windings from the first inverter unit 20a and the second inverter unit 20b. A ~I F It will be supplied.

[0036] As an example, the failure modes when faults are detected in the B-phase switch, D-phase switch, and F-phase switch are shown on the right side of Figure 3. In this failure mode, line current I is supplied from the first inverter unit 20a only to the A-phase winding, C-phase winding, and E-phase winding, which are the three-phase windings of the first system. A ,I C ,I EThis is supplied. Therefore, in the star connection failure mode, vector control is performed for the three-phase star connection, and the rotor 11 is rotated by the magnetic flux generated in the three windings 14.

[0037] Figure 4 is a schematic diagram illustrating the normal mode and fault mode operation when the A-phase windings to F-phase windings of the motor unit 10 are connected in a hexagon configuration. As shown in Figure 4, in the hexagon configuration, the A-phase windings to F-phase windings are connected in series in a ring shape with both ends connected to each other, and one end of the A-phase windings to F-phase windings is connected to relay switches 23a to 23f, respectively. In the normal mode of the hexagon configuration, as shown on the left side of Figure 4, line current I is supplied to the A-phase windings to F-phase windings from the first inverter unit 20a and the second inverter unit 20b. A ~I F A current is supplied, and phase current i is supplied to the A-phase winding to the F-phase winding. a ~i f It plays.

[0038] As an example, the failure modes when faults are detected in the B-phase switch, D-phase switch, and F-phase switch are shown on the right side of Figure 4. In the failure mode, line current I is supplied from the first inverter unit 20a only to the A-phase winding, C-phase winding, and E-phase winding, which are the three-phase windings of the first system. A ,I C ,I E A current is supplied. At this time, a three-phase delta connection is formed by the series connection of the A-phase winding and the B-phase winding, the C-phase winding and the D-phase winding, and the E-phase winding and the F-phase winding, and each has a phase current I ac ,I cd ,I ef A current flows through the system. Therefore, in the hexagon connection failure mode, vector control is performed for the three-phase delta connection, and the rotor 11 is rotated by the magnetic flux generated in the six windings 14.

[0039] Figure 5 is a graph showing the results of a simulation of the torque waveforms in the normal mode and failure mode of a motor device. In Figure 5, the horizontal axis represents the rotation angle (deg), and the vertical axis represents the torque (Nm). In the graph, the thick solid line, thin solid line, and dashed line represent the normal mode, upper fault, and lower fault modes, respectively, in a star connection. Also, the dashed line, thin dashed line, and thick dashed line represent the normal mode, upper fault, and lower fault modes, respectively, in a hexagon connection.

[0040] The simulation used the finite element method, with the rotor 11 having a diameter of 180 mm, a length of 55 mm, 10 poles P, and 12 slots S. The winding 14 had 20 turns in a star connection and 35 turns in a hexagon connection, with in-phase wires arranged diagonally as shown in Figure 1(a) connected in series. The current density was set to 6 Arms / mm². 2 This was assumed. Furthermore, a scenario was considered where either the upper switch 22bu or the lower switch 22bl of the B-phase switch had a short-circuit failure. While this example shows a short-circuit failure, the control switching from normal mode to failure mode is the same for ground faults and open-circuit failures, so similar results can be obtained for all types of failures.

[0041] As shown in Figure 5, in both the star and hexagon connections, torque is continuously output in the failure mode, indicating that the rotor 11 can continue to rotate. It can also be seen that the torque ripple period in the failure mode is approximately twice that of the normal mode. This is because, in the star connection failure mode, the spacing between the windings 14 that generate magnetic flux is twice that of the normal mode. Furthermore, in the hexagon connection failure mode, as described above, vector control is performed using half the angle θ of the rotor 11.

[0042] Furthermore, as shown in Figure 5, the torque in failure mode is smaller than in normal mode, but it tends to be larger in hexagon connection than in star connection. Table 1 shows the average torque and ripple rate for star and hexagon connections under normal conditions, upper stage failure, and lower stage failure. As shown in Table 1, the average torque obtained in hexagon connection is more than 50% of that in normal mode, indicating that hexagon connection is superior for improving torque in failure mode. In addition, the average torque obtained in star connection is more than 30% of that in normal mode, and the ripple rate is smaller than that of hexagon connection, indicating that star connection is superior when prioritizing low ripple in failure mode. [Table 1]

[0043] Figure 6 is a graph showing the simulation results of the line current waveforms for failure modes in a motor device. In Figure 6, the horizontal axis represents the rotation angle (deg), and the vertical axis represents the phase current (A). Although Figure 6 only shows the simulation results for an upper stage failure in a star connection, the line current waveform was the same for both upper and lower stage failures in both star and hexagon connections. As shown in Figure 6, since the simulation assumes a failure of the B phase switch, only the three-phase AC from relay switches 23a, 23c, and 23e is the line current I A ,I C ,I E It can be confirmed that it is being supplied as such.

[0044] Figure 7 is a graph showing the simulation results of the phase current waveforms in failure modes in a hexagon connection. Figure 7(a) shows the waveform at 1200 rpm, and Figure 7(b) shows the waveform at 6800 rpm. In Figure 7, the horizontal axis represents the electrical angle (deg), and the vertical axis represents the phase current (A). In the graph, the thick solid line, dashed line, and dotted line represent the phase currents flowing through the series connection of the A and B phase windings (AB phase), the C and D phase windings (CD phase), and the E and F phase windings (EF phase), respectively.

[0045] In this simulation, the finite element method was used, with the rotor 11 having a diameter of 180 mm and a length of 55 mm, the number of poles P of the rotor 11 being 10, and the number of slots S being 12. The number of turns of the winding 14 was set to 20 turns in a star connection and 35 turns in a hexagon connection, with in-phase wires arranged diagonally as shown in Figure 1(a) connected in series. Furthermore, the analysis was performed for two patterns: a sinusoidal current input with a width of 45 A at rotational speeds of 1200 rpm (low speed) and 6800 rpm (high speed).

[0046] As shown in Figures 7(a) and 7(b), in the hexagon connection failure mode, it can be confirmed that phase currents flow through vector control in the AB, CD, and EF phases of the three-phase AC. Furthermore, similar phase current waveforms are obtained at both the low rotation speed of 1200 rpm and the high rotation speed of 6800 rpm, indicating that the rotation of the rotor 11 can continue regardless of the rotational speed.

[0047] Figure 8 is a graph showing the results of the Fast Fourier Transform of the phase current waveforms in failure modes in a hexagon connection. Figure 8(a) shows the results at 1200 rpm, and Figure 8(b) shows the results at 6800 rpm. In Figure 8, the horizontal axis represents the order, and the vertical axis represents the phase current (A). As shown in Figures 8(a) and 8(b), it can be seen that a tertiary phase current is generated in addition to the primary phase current at both the low rotation speed of 1200 rpm and the high rotation speed of 6800 rpm.

[0048] Figure 9 is a graph showing the results of the Fast Fourier Transform of the phase current phases of failure modes in a hexagon connection. Figure 9(a) shows the results at 1200 rpm, and Figure 9(b) shows the results at 6800 rpm. In Figure 9, the horizontal axis represents the order, and the vertical axis represents the phase (deg). As shown in Figures 8(a) and 8(b), at both the low speed of 1200 rpm and the high speed of 6800 rpm, the primary phase current is a three-phase AC with a phase difference of 120 degrees, but the phases of the three phases of the tertiary phase current coincide. Therefore, it can be seen that the tertiary phase current is a circulating current flowing through the delta connection. However, the phases of the AB, CD, and EF phases of the tertiary circulating current are the same at both the low speed of 1200 rpm and the high speed of 6800 rpm, indicating that the circulating current does not change with rotational speed.

[0049] Figure 10 is a graph showing the simulation results of the torque waveform in a failure mode for a hexagon connection. In Figure 10, the horizontal axis represents the electrical angle (deg), and the vertical axis represents the torque (Nm). In the graph, the solid line shows the results for a low rotation speed of 1200 rpm, and the dashed line shows the results for a high rotation speed of 6800 rpm. The average torque was 5.38 Nm at 1200 rpm and 5.42 Nm at 6800 rpm. As shown in Figure 10, the torque waveform is almost the same at both the low rotation speed of 1200 rpm and the high rotation speed of 6800 rpm, indicating that a similar amount of torque can be obtained regardless of the generation of tertiary circulating current.

[0050] As described above, in the motor device of this embodiment, a six-phase winding is provided for a single rotor 11, and if a failure is detected in either the first inverter unit 20a or the second inverter unit 20b, the current output from the faulty side is stopped, and the other side is used to continue driving using vector control. This makes it possible to continue rotational driving even when a switch fails, and also allows for miniaturization and weight reduction.

[0051] The present invention is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of Symbols]

[0052] 10…Motor section 11… Rotor 12...Stator 13... Teeth Department 14...winding 20... Switch inverter section 20a...First inverter section 20b...Second inverter section 21a~21d...Backflow prevention switch 22au~22fu…Upper switch 22al~22fl…Lower switch 23a~23f... Relay switch

Claims

1. A motor section having a rotor rotatably arranged around a rotation axis and a stator with multiple teeth formed on its inner circumference, A switch inverter unit that supplies power to the motor unit, A motor device comprising a switch control unit that controls each switch included in the switch inverter unit, The rotor is made of a ferromagnetic material, The aforementioned multiple teeth sections are wound with six phase windings: phases A, B, C, D, E, and F. The switch inverter unit includes a first inverter unit that supplies current to the A phase, the C phase, and the E phase, and a second inverter unit that supplies current to the B phase, the D phase, and the F phase. The switch control unit controls the switch inverter in normal mode if no fault is detected in the switch inverter, and controls the switch inverter in fault mode if a fault is detected in the switch inverter. The normal mode is controlled as a switched reluctance motor by a 6-phase pulse drive using the first inverter unit and the second inverter unit. In the aforementioned failure mode, the motor device is characterized in that the current output from the first inverter unit or the second inverter unit corresponding to the failure is stopped, and the other unit is used to drive the motor as a synchronous reluctance motor using three-phase vector control.

2. A motor device according to claim 1, In the vector control in the aforementioned failure mode, the motor device is characterized in that θ / 2 is used when the detection angle at the rotor is θ.

3. A motor device according to claim 1, A motor device characterized in that the ratio of the number of poles P of the rotor to the number of slots S of the teeth portion is P:S = 5:

6.

4. A motor device according to any one of claims 1 to 3, A motor device characterized in that the A phase, B phase, C phase, D phase, E phase, and F phase are connected in a star configuration, with one end of each connected to a neutral point.

5. A motor device according to any one of claims 1 to 3, A motor device characterized in that the A phase, B phase, C phase, D phase, E phase, and F phase are connected in series in a ring shape and wired in a hexagon configuration.

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