Power supply circuit and rotating electric machine system

Abstract

Provided is a power supply circuit and a rotating electric machine system capable of suppressing complication of a structure and providing a rotating electric machine with different characteristics. A power supply circuit (2) supplies electric power to a rotating electric machine (M) having a first phase winding (α) having a first winding portion (α1) and a second winding portion (α2), and a second phase winding (β) having a third winding portion (β1) and a fourth winding portion (β2). A first circuit (3) connected to the first phase winding (α) has first to third arms (A1 to A3) and a first bidirectional switch (sw1a). A second circuit (4) connected to the second phase winding (β) has fourth to sixth arms (A4 to A6) and a second bidirectional switch (sw1b).

Description

Technical Field

[0001] This invention relates to a power supply circuit and a rotary motor system. Background Technology

[0002] In recent years, initiatives aimed at achieving a low-carbon or decarbonized society have been very active as concrete measures to address global climate change. Within the vehicle industry, there is also a strong demand to reduce carbon dioxide emissions, and the electrification of power sources is developing rapidly.

[0003] Patent Document 1 describes a three-phase AC motor equipped with a power-on mode switching unit, which is used as a drive source for an electric vehicle. In this three-phase AC motor, the power-on mode switching unit switches between a low-speed mode that energizes the first and second windings and a high-speed mode that energizes only the first winding.

[0004] Existing technical documents

[0005] Patent documents

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2012-213306

[0007] However, although the electric motor described in Patent Document 1 can have different characteristics by changing the number of power supply windings of an electric motor, it has as many as nine leads and as many as twelve switching elements, which complicates the structure of the electric motor. Summary of the Invention

[0008] The present invention provides a power supply circuit and a rotating motor system that can suppress structural complexity and enable rotating motors to have different characteristics.

[0009] This invention provides a power supply circuit that supplies power to a rotating motor, the rotating motor comprising a first phase winding having a first winding portion and a second winding portion, and a second phase winding having a third winding portion and a fourth winding portion.

[0010] The power supply circuit includes:

[0011] A first circuit, which is connected to a power source and to the first phase winding; and

[0012] The second circuit is connected in parallel with the first circuit relative to the power supply and is also connected to the second phase winding, wherein...

[0013] The first circuit includes: first to third arms, wherein the upper arm, which is provided with a switching element, and the lower arm, which is provided with a switching element, are connected at a midpoint; and a first switch.

[0014] The midpoint of the first arm is connected to one end of the first winding section.

[0015] The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section.

[0016] The midpoint of the third arm is connected to the other end of the second winding section.

[0017] The first switch

[0018] It is arranged in series with the first winding section, or between the switching element of the upper arm and the switching element of the lower arm of the first arm, or

[0019] It is configured in series with the second winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the third arm.

[0020] The second circuit includes: fourth to sixth arms, wherein the upper arm, in which a switching element is disposed, and the lower arm, in which a switching element is disposed, are connected at a midpoint; and a second switch.

[0021] The midpoint of the fourth arm is connected to one end of the third winding section.

[0022] The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding.

[0023] The midpoint of the sixth arm is connected to the other end of the fourth winding section.

[0024] Second switch

[0025] It is arranged in series with the third winding section, or between the switching element of the upper arm and the switching element of the lower arm of the fourth arm, or

[0026] It is arranged in series with the fourth winding section, or between the switching element of the upper arm and the switching element of the lower arm of the sixth arm.

[0027] Furthermore, the present invention also provides a rotary motor system comprising: a rotary motor having a first phase winding and a second phase winding; and

[0028] A power supply circuit that supplies power to the rotary motor, wherein,

[0029] The first phase winding has a first winding section and a second winding section.

[0030] The second phase winding has a third winding section and a fourth winding section.

[0031] The power supply circuit includes:

[0032] A first circuit, which is connected to a power source and to the first phase winding; and

[0033] The second circuit is connected in parallel with the first circuit relative to the power supply and is also connected to the second phase winding.

[0034] The first circuit includes: first to third arms, wherein the upper arm, which is provided with a switching element, and the lower arm, which is provided with a switching element, are connected at a midpoint; and a first switch.

[0035] The midpoint of the first arm is connected to one end of the first winding section.

[0036] The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section.

[0037] The midpoint of the third arm is connected to the other end of the second winding section.

[0038] The first switch

[0039] It is arranged in series with the first winding section, or between the switching element of the upper arm and the switching element of the lower arm of the first arm, or

[0040] It is configured in series with the second winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the third arm.

[0041] The second circuit includes: fourth to sixth arms, wherein the upper arm, in which a switching element is disposed, and the lower arm, in which a switching element is disposed, are connected at a midpoint; and a second switch.

[0042] The midpoint of the fourth arm is connected to one end of the third winding section.

[0043] The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding.

[0044] The midpoint of the sixth arm is connected to the other end of the fourth winding section.

[0045] Second switch

[0046] It is arranged in series with the third winding section, or between the switching element of the upper arm and the switching element of the lower arm of the fourth arm, or

[0047] It is arranged in series with the fourth winding section, or between the switching element of the upper arm and the switching element of the lower arm of the sixth arm.

[0048] According to the present invention, a power supply circuit and a rotating motor system are provided that can suppress structural complexity and enable rotating motors to have different characteristics. Attached Figure Description

[0049] Figure 1 This is a circuit diagram showing the structure of the rotary electric motor system according to the first embodiment.

[0050] Figure 2 It is shown Figure 1 The diagram illustrates the operation of the three modes of the rotary electric motor system.

[0051] Figure 3 This is a graph showing the torque performance in three modes.

[0052] Figure 4 This is a graph showing the output performance of the three modes.

[0053] Figure 5 This is a circuit diagram showing a first configuration example of a bidirectional switch.

[0054] Figure 6 This is a circuit diagram showing a second configuration example of a bidirectional switch.

[0055] Figure 7 This is a circuit diagram showing a third configuration example of a bidirectional switch.

[0056] Figure 8 This is a schematic diagram of a rotary electric motor.

[0057] Figure 9 This is a circuit diagram showing the structure of the rotary electric motor system according to the second embodiment.

[0058] Figure 10 It is shown Figure 9 The diagram illustrates the operation of the six modes of the rotary electric motor system.

[0059] Figure 11 It is a graph showing the torque performance of 6 modes.

[0060] Figure 12 This is a graph showing the output performance of the six modes.

[0061] --Symbol Explanation--

[0062] 1 Rotary Electric Machine System

[0063] 2 Power supply circuit

[0064] 3 First Circuit

[0065] 4 Second Circuit

[0066] α First phase winding

[0067] α1 First winding section

[0068] α2 Second winding section

[0069] α3 Fifth winding section

[0070] β second phase winding

[0071] β1 Third Winding Section

[0072] β2 Fourth Winding Section

[0073] β3 Sixth Winding Section

[0074] Arms A1 to A8 (First to Eighth Arms)

[0075] AH1 to AH8 upper arm

[0076] AL1 to AL8 lower arm

[0077] H1 to H8 switching elements

[0078] L1 to L8 switching elements

[0079] Midpoint between P1 and P8

[0080] SW1A First bidirectional switch (first switch)

[0081] SW1B Second bidirectional switch (second switch)

[0082] SW2A Third Bidirectional Switch (Third Switch)

[0083] SW2B Fourth Bidirectional Switch (Fourth Switch)

[0084] SW3A Fifth Bidirectional Switch (Fifth Switch)

[0085] SW3B Sixth Bidirectional Switch (Sixth Switch)

[0086] B power supply

[0087] M Rotary Motor Detailed Implementation

[0088] First, refer to Figures 1 to 8 The first embodiment of the present invention will be described.

[0089] (Rotating motor system)

[0090] like Figure 1 and Figure 8 As shown, the rotary motor system 1 includes a rotary motor M and a power supply circuit 2 that supplies power to the rotary motor M.

[0091] (Rotary motor)

[0092] like Figure 8 As shown, the rotary motor M is a two-phase rotary motor comprising a rotor 10, a stator 11, and a first-phase winding α and a second-phase winding β wound on the stator 11, for example, a two-phase brushless motor. The first-phase winding α and the second-phase winding β are arranged on the stator 11, for example, with an electrical angle offset of 90°. The first-phase winding α has a first winding portion α1 and a second winding portion α2, and the second-phase winding β has a third winding portion β1 and a fourth winding portion β2. The number of turns in the first winding portion α1 (sometimes referred to as the number of turns in the figure) is different from the number of turns in the second winding portion α2. In this embodiment, the first winding portion α1 has more turns than the second winding portion α2. Furthermore, the number of turns in the third winding portion β1 is also different from the number of turns in the fourth winding portion β2. In this embodiment, the third winding portion β1 has more turns than the fourth winding portion β2. However, the number of turns in the first winding section α1 is the same as the number of turns in the third winding section β1, and the number of turns in the second winding section α2 is the same as the number of turns in the fourth winding section β2.

[0093] (Power supply circuit)

[0094] The power supply circuit 2 includes: a first circuit 3 connected to the power supply B and to the winding α of the first phase; and a second circuit 4 connected in parallel with the first circuit 3 relative to the power supply B and to the winding β of the second phase. Figure 1 In the diagram, the symbol C stands for smoothing capacitor.

[0095] The first circuit 3 includes first to third arms A1 to A3, a first bidirectional switch sw1a, and a third bidirectional switch sw2a.

[0096] The first to third arms A1 to A3 are connected in parallel with respect to power supply B. The first arm A1 includes: an upper arm AH1, which has a switching element H1 and a freewheeling diode D connected in parallel; and a lower arm AL1, which has a switching element L1 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH1 via a midpoint P1. The second arm A2 includes: an upper arm AH2, which has a switching element H2 and a freewheeling diode D connected in parallel; and a lower arm AL2, which has a switching element L2 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH2 via a midpoint P2. The third arm A3 includes: an upper arm AH3, which has a switching element H3 and a freewheeling diode D connected in parallel; and a lower arm AL3, which has a switching element L3 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH3 via a midpoint P3.

[0097] Furthermore, one end of the first winding portion α1 is connected to the midpoint P1 of the first arm A1, the other end of the first winding portion α1 and one end of the second winding portion α2 are connected to the midpoint P2 of the second arm A2, and the other end of the second winding portion α2 is connected to the midpoint P3 of the third arm A3.

[0098] For example, such as Figure 5 As shown, the first bidirectional switch sw1a and the third bidirectional switch sw2a are configured to connect two sets of circuits, each including a switching element and a diode, in parallel in reverse series (connecting the forward directions of the diodes to each other), and are capable of switching the flow of bidirectional current between an on state and an off state based on the switching control of the two sets of switching elements. Figure 1 In the example, the first bidirectional switch sw1a is connected in series on the first arm A1 side of the first winding section α1, and the third bidirectional switch sw2a is connected in series on the third arm A3 side of the second winding section α2.

[0099] The second circuit 4 includes the fourth to sixth arms A4 to A6, the second bidirectional switch sw1b, and the fourth bidirectional switch sw2b.

[0100] The fourth to sixth arms A4 to A6 of the second circuit 4 are connected in parallel with respect to the power supply B. The fourth arm A4 includes: an upper arm AH4, which has a switching element H4 and a freewheeling diode D connected in parallel; and a lower arm AL4, which has a switching element L4 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH4 via the midpoint P4. The fifth arm A5 includes: an upper arm AH5, which has a switching element H5 and a freewheeling diode D connected in parallel; and a lower arm AL5, which has a switching element L5 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH5 via the midpoint P5. The sixth arm A6 includes: an upper arm AH6, which has a switching element H6 and a freewheeling diode D connected in parallel; and a lower arm AL6, which has a switching element L6 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH6 via the midpoint P6.

[0101] Furthermore, one end of the third winding β1 is connected to the midpoint P4 of the fourth arm A4, the other end of the third winding β1 and one end of the fourth winding β2 are connected to the midpoint P5 of the fifth arm A5, and the other end of the fourth winding β2 is connected to the midpoint P6 of the sixth arm A6.

[0102] The second bidirectional switch sw1b and the fourth bidirectional switch sw2b have the same configuration as the first bidirectional switch sw1a and the third bidirectional switch sw2a. Figure 1 In the example, the second bidirectional switch sw1b is connected in series on the fourth arm A4 side of the third winding section β1, and the fourth bidirectional switch sw2b is connected in series on the sixth arm A6 side of the fourth winding section β2.

[0103] According to the power supply circuit 2 described above, by changing the number of winding sections supplied with power when supplying power to the windings α and β of each phase, the rotary motor M can have different characteristics. Furthermore, in the case of a two-phase rotary motor, the number of leads is 6 and the number of switching elements is 12, thus suppressing structural complexity. Moreover, the number of turns in the first winding section α1 is different from the number of turns in the second winding section α2, and the number of turns in the third winding section β1 is different from the number of turns in the fourth winding section β2, thus enabling the rotary motor M to have three different characteristics. Hereinafter, refer to... Figures 2 to 4 The three switchable modes are explained.

[0104] (First Mode)

[0105] like Figure 2 As shown on the left, in the first mode, the first bidirectional switch sw1a, the second bidirectional switch sw1b, the third bidirectional switch sw2a, and the fourth bidirectional switch sw2b are in the ON state. Based on the switching control of the first arm A1, the third arm A3, the fourth arm A4, and the sixth arm A6, power is supplied to the first winding portion α1 and the second winding portion α2 of the first phase winding α, and the third winding portion β1 and the fourth winding portion β2 of the second phase winding β. In this first mode, the number of turns of the windings α and β to which power is supplied (in...) Figure 2 In the text, the number of turns (α1+α2, β1+β2) is recorded in many places, therefore, as... Figure 3 and Figure 4 As shown, this can improve torque and output in the low-speed range. Furthermore, it can increase inductance and reduce high-order harmonic components of the current and iron losses.

[0106] (Second Mode)

[0107] like Figure 2 As shown in the center of the left-right direction, in the second mode, the first bidirectional switch sw1a and the second bidirectional switch sw1b are in the ON state, and the third bidirectional switch sw2a and the fourth bidirectional switch sw2b are in the OFF state. Power is supplied to the first winding portion α1 of the first phase winding α and the third winding portion β1 of the second phase winding β based on the switching control of the first arm A1, the second arm A2, the fourth arm A4, and the fifth arm A5. According to this second mode, compared with the first mode, the number of turns of the windings α and β supplied with power (in Figure 2 In the text, the number of turns (α1, β1) is relatively small, therefore, as... Figure 3 and Figure 4 As shown, compared with the first mode, the magnetic flux and back electromotive force are reduced, which can improve the torque and output in the mid-speed and high-speed regions.

[0108] Furthermore, by using the third bidirectional switch sw2a and the fourth bidirectional switch sw2b, it is possible to suppress the induced current from flowing to the second winding α2 and the fourth winding β2, which are not supplied with power, due to the energization of the first winding α1 and the third winding β1.

[0109] (Third Mode)

[0110] like Figure 2 As shown on the right, in the third mode, the third bidirectional switch sw2a and the fourth bidirectional switch sw2b are in the ON state, while the first bidirectional switch sw1a and the second bidirectional switch sw1b are in the OFF state. Power is supplied to the second winding portion α2 of the first phase winding α and the fourth winding portion β2 of the second phase winding β based on the switching control of the second arm A2, the third arm A3, the fifth arm A5, and the sixth arm A6. According to this third mode, compared with the second mode, the number of turns of the windings α and β supplied with power (in... Figure 2 In the text, the number of turns is recorded as: α2, β2) is even less, therefore, as Figure 3 and Figure 4 As shown, compared to the second mode, the magnetic flux and back electromotive force are further reduced, which can further improve the torque and output in the high-speed range.

[0111] Furthermore, by using the first bidirectional switch sw1a and the second bidirectional switch sw1b, it is possible to suppress the flow of induced current to the first winding α1 and the third winding β1, which are not supplied with power, due to the energization of the second winding α2 and the fourth winding β2.

[0112] (Example of a two-way switch configuration)

[0113] Next, refer to Figures 5 to 7 Describe a specific configuration example of the first bidirectional switch sw1a, the second bidirectional switch sw1b, the third bidirectional switch sw2a, and the fourth bidirectional switch sw2b.

[0114] exist Figure 5 In the configuration example described above, the first bidirectional switch sw1a is connected in series on the first arm A1 side of the first winding section α1, and the second bidirectional switch sw1b is connected in series on the fourth arm A4 side of the third winding section β1. Furthermore, the third bidirectional switch sw2a is connected in series on the third arm A3 side of the second winding section α2, and the fourth bidirectional switch sw2b is connected in series on the sixth arm A6 side of the fourth winding section β2. Alternatively, the first bidirectional switch sw1a can be connected in series on the second arm A2 side of the first winding section α1, and the second bidirectional switch sw1b can be connected in series on the fifth arm A5 side of the third winding section β1. Alternatively, the third bidirectional switch sw2a can be connected in series on the second arm A2 side of the second winding section α2, and the fourth bidirectional switch sw2b can be connected in series on the fifth arm A5 side of the fourth winding section β2.

[0115] exist Figure 6 In the configuration example, the first bidirectional switch sw1a is disposed between the switching element H1 of the upper arm AH1 and the switching element L1 of the lower arm AL1 of the first arm A1, and the second bidirectional switch sw1b is disposed between the switching element H4 of the upper arm AH4 and the switching element L4 of the lower arm AL4 of the fourth arm A4. Furthermore, a specific configuration example is shown where the third bidirectional switch sw2a is disposed between the switching element H3 of the upper arm AH3 and the switching element L3 of the lower arm AL3 of the third arm A3, and the fourth bidirectional switch sw2b is disposed between the switching element H6 of the upper arm AH6 and the switching element L6 of the lower arm AL6 of the sixth arm A6. With this configuration structure, the three modes can still be implemented in the same way as the first embodiment described above.

[0116] exist Figure 7 In the configuration example, the first bidirectional switch swla is disposed between the switching element H3 of the upper arm AH3 and the switching element L3 of the lower arm AL3 of the third arm A3, and the second bidirectional switch sw1b is disposed between the switching element H6 of the upper arm AH6 and the switching element L6 of the lower arm AL6 of the sixth arm A6. According to this configuration structure, although the number of switchable modes is reduced to... Figure 2 The system offers two modes: a first mode and a second mode. However, it can reduce the number of bidirectional switches, thereby cutting costs. Alternatively, the first bidirectional switch sw1a can be positioned between the switching element H1 of the upper arm AH1 and the switching element L1 of the lower arm AL1 of the first arm A1, and the second bidirectional switch sw1b can be positioned between the switching element H4 of the upper arm AH4 and the switching element L4 of the lower arm AL4 of the fourth arm A4.

[0117] (Second Implementation)

[0118] Next, refer to Figures 9 to 12 The rotary electric motor system 1B and the power supply circuit 2B of the second embodiment will be described. However, for structures common to the first embodiment described above, the description of the first embodiment is sometimes referred to by using the same reference numerals as those in the first embodiment.

[0119] The difference between the rotary motor system 1B in the second embodiment and the first embodiment is that the number of winding sections in each phase of the rotary motor M is 3, the number of bidirectional switches in the power supply circuit 2B is 6, and the number of switchable modes is increased to 6. The differences from the first embodiment will be explained in detail below.

[0120] The rotary motor M in the second embodiment also includes a fifth winding section α3 and a sixth winding section β3. The first circuit 3B in the second embodiment also includes a seventh arm A7 and a fifth bidirectional switch sw3a. The second circuit 4B in the second embodiment also includes an eighth arm A8 and a sixth bidirectional switch sw3b.

[0121] The fifth winding section α3 is a first phase winding α connected in series with the first winding section α1 and the second winding section α2. Its number of turns is different from that of the first winding section α1 and the second winding section α2, for example, it has fewer turns than the second winding section α2.

[0122] The sixth winding β3 is a second-phase winding β connected in series with the third winding β1 and the fourth winding β2. Its number of turns differs from that of the third winding β1 and the fourth winding β2; for example, it has fewer turns than the fourth winding β2. However, the fifth winding α3 has the same number of turns as the sixth winding β3.

[0123] The seventh arm A7 includes: an upper arm AH7, which has a switching element H7 and a freewheeling diode D connected in parallel; and a lower arm AL7, which has a switching element L7 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH7 via the midpoint P7. One end of the fifth winding section α3 is connected to the midpoint P3 of the third arm A3, and the other end is connected to the midpoint P7 of the seventh arm A7. Furthermore, a fifth bidirectional switch sw3a is connected in series on one side of the fifth winding section α3 on the seventh arm A7 side. Alternatively, the fifth bidirectional switch sw3a can also be connected in series on one side of the fifth winding section α3 on the third arm A3 side.

[0124] The eighth arm A8 includes: an upper arm AH8, which has a switching element H8 and a freewheeling diode D connected in parallel; and a lower arm AL8, which has a switching element L8 and a freewheeling diode D connected in parallel, connected in series with the upper arm AH8 via the midpoint P8. One end of the sixth winding section β3 is connected to the midpoint P6 of the sixth arm A6, and the other end is connected to the midpoint P8 of the eighth arm A8. Furthermore, a sixth bidirectional switch sw3b is connected in series on one side of the sixth winding section β3 on the eighth arm A8 side. Alternatively, the sixth bidirectional switch sw3b can also be connected in series on one side of the sixth winding section β3 on the sixth arm A6 side. Referring to the following... Figures 10 to 12 The six switchable modes are explained.

[0125] (Mode 11)

[0126] like Figure 10As shown on the upper left, in the eleventh mode, the first bidirectional switch swla, the second bidirectional switch sw1b, the third bidirectional switch sw2a, the fourth bidirectional switch sw2b, the fifth bidirectional switch sw3a, and the sixth bidirectional switch sw3b are in the ON state. Based on the switching control of the first arm A1, the seventh arm A7, the fourth arm A4, and the eighth arm A8, power is supplied to the first winding section α1, the second winding section α2, and the fifth winding section α3 of the first phase winding α, and the third winding section β1, the fourth winding section β2, and the sixth winding section β3 of the second phase winding β. Figure 10 In the text, the number of turns is recorded as: α1+α2+α3, β1+β2+β3).

[0127] (Mode 12)

[0128] like Figure 10 As shown in the upper left-right center, in the twelfth mode, the first bidirectional switch sw1a, the second bidirectional switch sw1b, the third bidirectional switch sw2a, and the fourth bidirectional switch sw2b are in the on state, and the fifth bidirectional switch sw3a and the sixth bidirectional switch sw3b are in the off state. Based on the switching control of the first arm A1, the third arm A3, the fourth arm A4, and the sixth arm A6, power is supplied to the first winding portion α1 and the second winding portion α2 of the first phase winding α, and the third winding portion β1 and the fourth winding portion β2 of the second phase winding β. Figure 10 In the text, the number of turns is recorded as: α1+α2, β1+β2).

[0129] (Mode 13)

[0130] like Figure 10 As shown on the upper right side, in the thirteenth mode, the third bidirectional switch sw2a, the fourth bidirectional switch sw2b, the fifth bidirectional switch sw3a, and the sixth bidirectional switch sw3b are in the on state, while the first bidirectional switch sw1a and the second bidirectional switch sw1b are in the off state. Based on the switching control of the second arm A2, the seventh arm A7, the fifth arm A5, and the eighth arm A8, power is supplied to the second winding section α2 and the fifth winding section α3 of the first phase winding α, and the fourth winding section β2 and the sixth winding section β3 of the second phase winding β. Figure 10 In the text, the number of turns is recorded as: α2+α3, β2+β3).

[0131] (Mode Fourteen)

[0132] like Figure 10As shown on the lower left, in the fourteenth mode, the first bidirectional switch sw1a and the second bidirectional switch sw1b are in the ON state, and the third bidirectional switch sw2a, the fourth bidirectional switch sw2b, the fifth bidirectional switch sw3a, and the sixth bidirectional switch sw3b are in the OFF state. Based on the switching control of the first arm A1, the second arm A2, the fourth arm A4, and the fifth arm A5, power is supplied to the first winding portion α1 of the first phase winding α and the third winding portion β1 of the second phase winding β. Figure 10 In the text, the number of turns is recorded as: α1, β1).

[0133] (Mode 15)

[0134] like Figure 10 As shown in the center of the lower left-right direction, in the fifteenth mode, the third bidirectional switch sw2a and the fourth bidirectional switch sw2b are in the on state, and the first bidirectional switch sw1a, the second bidirectional switch sw1b, the fifth bidirectional switch sw3a and the sixth bidirectional switch sw3b are in the off state. Based on the switching control of the second arm A2, the third arm A3, the fifth arm A5 and the sixth arm A6, power is supplied to the second winding portion α2 of the first phase winding α and the fourth winding portion β2 of the second phase winding β (in Figure 10 In the text, the number of turns is recorded as α2, β2).

[0135] (Sixteenth Mode)

[0136] like Figure 10 As shown on the lower right side, in the sixteenth mode, the fifth bidirectional switch sw3a and the sixth bidirectional switch sw3b are in the ON state, and the first bidirectional switch sw1a, the second bidirectional switch sw1b, the third bidirectional switch sw2a, and the fourth bidirectional switch sw2b are in the OFF state. Power is supplied to the fifth winding portion α3 of the first phase winding α and the sixth winding portion β3 of the second phase winding β based on the switching control of the third arm A3, the seventh arm A7, the sixth arm A6, and the eighth arm A8 (in Figure 10 In the text, the number of turns is recorded as: α3, β3).

[0137] According to the second embodiment described above, such as Figure 11 and Figure 12 As shown, by reducing the number of turns in the power-supplying windings α and β, the magnetic flux and back electromotive force are reduced, which can increase torque and output on the high-rotation side. Furthermore, compared to the first embodiment, the rotary motor M can have more characteristics, thus further improving output efficiency.

[0138] Furthermore, similar to the changes from the first embodiment to the second embodiment, the present invention enables the free design of a rotary motor M with various characteristics by increasing the number of arms connected in parallel with each circuit and increasing the number of bidirectional switches equal to the number of arms increased.

[0139] Various embodiments have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious to those skilled in the art that various modifications or alterations will arise within the scope of the claims, and these modifications or alterations are also within the technical scope of the present invention. Furthermore, the constituent elements in the above embodiments can be arbitrarily combined without departing from the spirit of the invention.

[0140] For example, a bidirectional switch only needs to be able to cut off the flow of bidirectional current; it can be a contactor mechanical switch or a reverse blocking type IGBT, etc.

[0141] At least the following items are described in this specification. It should be noted that the corresponding components in the above embodiments are shown in parentheses, but the scope is not limited thereto.

[0142] (1) A power supply circuit (power supply circuit 2) supplies power to a rotating motor (rotating motor M), the rotating motor having a first phase winding (first phase winding α) having a first winding portion (first winding portion α1) and a second winding portion (second winding portion α2), and a second phase winding (second phase winding β) having a third winding portion (third winding portion β1) and a fourth winding portion (fourth winding portion β2).

[0143] The power supply circuit includes:

[0144] A first circuit (first circuit 3) is connected to a power source (power source B) and to the first phase winding; and

[0145] The second circuit (second circuit 4) is connected in parallel with the first circuit relative to the power supply and is connected to the second phase winding, wherein...

[0146] The first circuit includes: a first arm to a third arm (first arm to third arm A1 to A3), wherein the upper arm (upper arm AH1 to AH3) provided with switching elements (switching elements H1 to H3) and the lower arm (lower arm AL1 to AL3) provided with switching elements (switching elements L1 to L3) are connected at their midpoints (midpoints P1 to P3); and a first switch (first bidirectional switch sw1a).

[0147] The midpoint of the first arm is connected to one end of the first winding section.

[0148] The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section.

[0149] The midpoint of the third arm is connected to the other end of the second winding section.

[0150] The first switch

[0151] It is arranged in series with the first winding section, or between the switching element of the upper arm and the switching element of the lower arm of the first arm, or

[0152] It is configured in series with the second winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the third arm.

[0153] The second circuit includes: fourth to sixth arms (fourth to sixth arms A4 to A6), wherein the upper arms (upper arms AH4 to AH6) provided with switching elements (switching elements H4 to H6) and the lower arms (lower arms AL4 to AL6) provided with switching elements (switching elements L4 to L6) are connected at their midpoints (midpoints P4 to P6); and a second switch (second bidirectional switch sw1b).

[0154] The midpoint of the fourth arm is connected to one end of the third winding section.

[0155] The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding.

[0156] The midpoint of the sixth arm is connected to the other end of the fourth winding section.

[0157] Second switch

[0158] It is arranged in series with the third winding section, or between the switching element of the upper arm and the switching element of the lower arm of the fourth arm, or

[0159] It is arranged in series with the fourth winding section, or between the switching element of the upper arm and the switching element of the lower arm of the sixth arm.

[0160] According to (1), by changing the number of winding sections supplied with power when power is supplied to the windings of each phase, the rotating motor can have different characteristics. This allows for the selection of an efficient operating point, thereby improving output efficiency. Furthermore, for example, in the case of a two-phase rotating motor, the number of leads is 6 and the number of switching elements is 12, thus suppressing structural complexity.

[0161] Furthermore, by using the first and second switches, it is possible to suppress the flow of induced current to the non-power-supplying side due to the energization of one of the first winding section, the third winding section, the second winding section, and the fourth winding section.

[0162] (2) According to the power supply circuit described in (1), wherein,

[0163] The power supply circuit is configured to switch between a first mode and a second mode.

[0164] In the first mode, the first switch and the second switch are in the ON state, supplying power to the first winding section and the second winding section of the first phase winding, as well as the third winding section and the fourth winding section of the second phase winding.

[0165] In the second mode, the first switch and the second switch are in the off state, and power is supplied to the first winding portion of the first phase winding and the third winding portion of the second phase winding, or power is supplied to the second winding portion of the first phase winding and the fourth winding portion of the second phase winding.

[0166] According to (2), in the first mode, the number of turns of the winding supplied with power is greater, thus increasing the torque, increasing the inductance, reducing the high-order harmonic components of the current, and reducing iron losses. On the other hand, in the second mode, the number of turns of the winding supplied with power is less, thus reducing the magnetic flux and lowering the back electromotive force, which can improve the output on the high-rotation side.

[0167] (3) According to the power supply circuit described in (1), wherein,

[0168] The first circuit also includes a third switch (a third bidirectional switch sw2a).

[0169] The first switch

[0170] It is arranged in series with the first winding section, or it is arranged between the switching element of the upper arm and the switching element of the lower arm of the first arm.

[0171] The third switch

[0172] It is configured in series with the second winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the third arm.

[0173] The second circuit also includes a fourth switch (a fourth bidirectional switch sw2b).

[0174] Second switch

[0175] It is configured in series with the third winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the fourth arm.

[0176] The fourth switch is connected in series with the fourth winding portion, or is disposed between the switching element of the upper arm and the switching element of the lower arm of the sixth arm.

[0177] According to (3), the mode can be switched by switching the first to fourth switches, thus reducing the control load.

[0178] (4) According to the power supply circuit described in (3), wherein,

[0179] The number of turns in the first winding section is different from the number of turns in the second winding section.

[0180] The number of turns in the third winding is different from the number of turns in the fourth winding.

[0181] According to (4), the rotary motor can have three different characteristics, thus further improving the output efficiency.

[0182] (5) According to the power supply circuit described in (4), wherein,

[0183] The power supply circuit is configured to switch between a first mode, a second mode, and a third mode.

[0184] In the first mode, the first switch, the second switch, the third switch, and the fourth switch are in the ON state, supplying power to the first and second winding portions of the first phase winding and the third and fourth winding portions of the second phase winding.

[0185] In the second mode, the first and second switches are in the ON state, and the third and fourth switches are in the OFF state, supplying power to the first winding portion of the first phase winding and the third winding portion of the second phase winding.

[0186] In the third mode, the third switch and the fourth switch are in the ON state, and the first switch and the second switch are in the OFF state, supplying power to the second winding portion of the first phase winding and the fourth winding portion of the second phase winding.

[0187] According to (5), in the first mode, the number of turns of the winding supplied with power is greater, thus increasing the torque, raising the inductance, reducing the high-order harmonic components of the current, and decreasing iron losses. On the other hand, in the second and third modes, the number of turns of the winding supplied with power is less, thus reducing the magnetic flux and lowering the back electromotive force, which can improve the output on the high-rotation side. Furthermore, the number of turns of the winding supplied with power is different in the second and third modes, so an appropriate mode can be selected according to the operating conditions of the rotating motor.

[0188] (6) The power supply circuit according to any one of (1) to (5), wherein,

[0189] The first circuit further comprises: a seventh arm (seventh arm A7), wherein an upper arm (upper arm AH7) provided with a switching element (switching element H7) and a lower arm (lower arm AL7) provided with a switching element (switching element L7) are connected at their midpoint (midpoint P7); and a fifth switch (fifth bidirectional switch sw3a).

[0190] The midpoint of the third arm is connected to one end of the fifth winding section (fifth winding section α3) of the first phase winding that is connected to the first winding section and the second winding section.

[0191] The midpoint of the seventh arm is connected to the other end of the fifth winding section.

[0192] The fifth switch is connected in series with the fifth winding section, or it is disposed between the switching element of the upper arm and the switching element of the lower arm of the seventh arm.

[0193] The second circuit further includes: an eighth arm (eighth arm A8), wherein an upper arm (upper arm AH8) provided with a switching element (switching element H8) and a lower arm (lower arm AL8) provided with a switching element (switching element L8) are connected at their midpoint (midpoint P8); and a sixth switch (sixth bidirectional switch sw3b).

[0194] The midpoint of the sixth arm is connected to one end of the sixth winding section (sixth winding section β3) of the second phase winding that is connected to the third winding section and the fourth winding section.

[0195] The midpoint of the eighth arm is connected to the other end of the sixth winding section.

[0196] The sixth switch is connected in series with the sixth winding section, or it is located between the switching element of the upper arm and the switching element of the lower arm of the eighth arm.

[0197] According to (6), by increasing the number of winding sections of each phase winding, the rotating motor can have more characteristics, and thus the output efficiency can be further improved.

[0198] (7) According to the power supply circuit described in (6), wherein,

[0199] The number of turns in the first winding section, the number of turns in the second winding section, and the number of turns in the fifth winding section are different.

[0200] The number of turns in the third winding section, the fourth winding section, and the sixth winding section are different.

[0201] According to (7), by increasing the number of winding sections of the two-phase windings and thus changing the number of turns of the winding sections, the rotating motor can have more characteristics, and thus the output efficiency can be further improved.

[0202] (8) A rotary electric motor system (rotary electric motor system 1) comprising: a rotary electric motor (rotary electric motor M) having a first phase winding (first phase winding α) and a second phase winding (second phase winding β); and

[0203] A power supply circuit (power supply circuit 2) supplies power to the rotary motor, wherein,

[0204] The first phase winding has a first winding section (first winding section α1) and a second winding section (second winding section α2).

[0205] The second phase winding has a third winding section (third winding section β1) and a fourth winding section (fourth winding section β2).

[0206] The power supply circuit includes:

[0207] A first circuit (first circuit 3) is connected to a power source (power source B) and to the first phase winding; and

[0208] The second circuit (second circuit 4) is connected in parallel with the first circuit relative to the power supply and is connected to the second phase winding, wherein...

[0209] The first circuit includes: a first arm to a third arm (first arm to third arm A1 to A3), wherein the upper arm (upper arm AH1 to AH3) provided with switching elements (switching elements H1 to H3) and the lower arm (lower arm AL1 to AL3) provided with switching elements (switching elements L1 to L3) are connected at their midpoints (midpoints P1 to P3); and a first switch (first bidirectional switch sw1a).

[0210] The midpoint of the first arm is connected to one end of the first winding section.

[0211] The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section.

[0212] The midpoint of the third arm is connected to the other end of the second winding section.

[0213] The first switch

[0214] It is arranged in series with the first winding section, or between the switching element of the upper arm and the switching element of the lower arm of the first arm, or

[0215] It is configured in series with the second winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the third arm.

[0216] The second circuit includes: fourth to sixth arms (fourth to sixth arms A4 to A6), wherein the upper arms (upper arms AH4 to AH6) provided with switching elements (switching elements H4 to H6) and the lower arms (lower arms AL4 to AL6) provided with switching elements (switching elements L4 to L6) are connected at their midpoints (midpoints P4 to P6); and a second switch (second bidirectional switch sw1b).

[0217] The midpoint of the fourth arm is connected to one end of the third winding section.

[0218] The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding.

[0219] The midpoint of the sixth arm is connected to the other end of the fourth winding section.

[0220] Second switch

[0221] It is arranged in series with the third winding section, or between the switching element of the upper arm and the switching element of the lower arm of the fourth arm, or

[0222] It is arranged in series with the fourth winding section, or between the switching element of the upper arm and the switching element of the lower arm of the sixth arm.

[0223] According to (8), by changing the number of winding sections that receive power when power is supplied to the windings of each phase, the rotating motor can have different characteristics. As a result, an efficient operating point can be selected, thereby improving output efficiency.

Claims

1. A power supply circuit that supplies power to a rotating motor, the rotating motor comprising a first phase winding having a first winding portion and a second winding portion, and a second phase winding having a third winding portion and a fourth winding portion. The power supply circuit includes: A first circuit, which is connected to a power source and to the first phase winding; and The second circuit is connected in parallel with the first circuit relative to the power supply and is also connected to the second phase winding, wherein... The first circuit includes: The first to third arms, wherein the upper arm with the switching element is connected to the lower arm with the switching element at its midpoint; as well as First switch, The midpoint of the first arm is connected to one end of the first winding section. The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section. The midpoint of the third arm is connected to the other end of the second winding section. The second circuit includes: The fourth to sixth arms, wherein the upper arm with the switching element is connected to the lower arm with the switching element at its midpoint; and Second switch, The midpoint of the fourth arm is connected to one end of the third winding section. The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding. The midpoint of the sixth arm is connected to the other end of the fourth winding section. The first circuit also has a third switch. The first switch is connected in series with the first winding portion, or is disposed between the switching element of the upper arm and the switching element of the lower arm of the first arm. The third switch is configured in series with the second winding portion, or is configured between the switching element of the upper arm and the switching element of the lower arm of the third arm. The second circuit also has a fourth switch. The second switch is configured in series with the third winding section, or is configured between the switching element of the upper arm and the switching element of the lower arm of the fourth arm. The fourth switch is connected in series with the fourth winding section, or it is disposed between the switching element of the upper arm and the switching element of the lower arm of the sixth arm. The number of turns in the first winding section is different from the number of turns in the second winding section. The number of turns in the third winding is different from the number of turns in the fourth winding.

2. The power supply circuit according to claim 1, wherein, The power supply circuit is configured to switch between a first mode, a second mode, and a third mode. In the first mode, the first switch, the second switch, the third switch, and the fourth switch are in the ON state, supplying power to the first and second winding portions of the first phase winding and the third and fourth winding portions of the second phase winding. In the second mode, the first and second switches are in the ON state, and the third and fourth switches are in the OFF state, supplying power to the first winding portion of the first phase winding and the third winding portion of the second phase winding. In the third mode, the third switch and the fourth switch are in the ON state, and the first switch and the second switch are in the OFF state, supplying power to the second winding portion of the first phase winding and the fourth winding portion of the second phase winding.

3. The power supply circuit according to claim 1 or 2, wherein, The first circuit also includes: The seventh arm, in which the upper arm with a switching element and the lower arm with a switching element are connected at the midpoint; as well as Fifth switch, The midpoint of the third arm is connected to one end of the fifth winding portion of the first phase winding that is connected to the first winding portion and the second winding portion. The midpoint of the seventh arm is connected to the other end of the fifth winding section. The fifth switch is connected in series with the fifth winding section, or it is disposed between the switching element of the upper arm and the switching element of the lower arm of the seventh arm. The second circuit also includes: The eighth arm, wherein the upper arm, in which a switching element is provided, and the lower arm, in which a switching element is provided, are connected at their midpoints; and The sixth switch, The midpoint of the sixth arm is connected to one end of the sixth winding portion of the second phase winding that is connected to the third winding portion and the fourth winding portion. The midpoint of the eighth arm is connected to the other end of the sixth winding section. The sixth switch is connected in series with the sixth winding section, or it is located between the switching element of the upper arm and the switching element of the lower arm of the eighth arm.

4. A power supply circuit that supplies power to a rotating motor, the rotating motor comprising a first phase winding having a first winding portion and a second winding portion, and a second phase winding having a third winding portion and a fourth winding portion. The power supply circuit includes: A first circuit, which is connected to a power source and to the first phase winding; and The second circuit is connected in parallel with the first circuit relative to the power supply and is also connected to the second phase winding, wherein... The first circuit includes: The first to third arms, wherein the upper arm with the switching element is connected to the lower arm with the switching element at its midpoint; as well as First switch, The midpoint of the first arm is connected to one end of the first winding section. The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section. The midpoint of the third arm is connected to the other end of the second winding section. The first switch It is arranged in series with the first winding section, or between the switching element of the upper arm and the switching element of the lower arm of the first arm, or It is configured in series with the second winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the third arm. The second circuit includes: The fourth to sixth arms, wherein the upper arm with the switching element is connected to the lower arm with the switching element at its midpoint; as well as Second switch, The midpoint of the fourth arm is connected to one end of the third winding section. The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding. The midpoint of the sixth arm is connected to the other end of the fourth winding section. Second switch It is arranged in series with the third winding section, or between the switching element of the upper arm and the switching element of the lower arm of the fourth arm, or It is configured in series with the fourth winding section, or configured between the switching element of the upper arm and the switching element of the lower arm of the sixth arm. The first circuit also includes: The seventh arm, in which the upper arm with a switching element and the lower arm with a switching element are connected at the midpoint; as well as Fifth switch, The midpoint of the third arm is connected to one end of the fifth winding portion of the first phase winding that is connected to the first winding portion and the second winding portion. The midpoint of the seventh arm is connected to the other end of the fifth winding section. The fifth switch is connected in series with the fifth winding section, or it is disposed between the switching element of the upper arm and the switching element of the lower arm of the seventh arm. The second circuit also includes: The eighth arm, wherein the upper arm, in which a switching element is provided, and the lower arm, in which a switching element is provided, are connected at their midpoints; and The sixth switch, The midpoint of the sixth arm is connected to one end of the sixth winding portion of the second phase winding that is connected to the third winding portion and the fourth winding portion. The midpoint of the eighth arm is connected to the other end of the sixth winding section. The sixth switch is connected in series with the sixth winding section, or it is disposed between the switching element of the upper arm and the switching element of the lower arm of the eighth arm. The number of turns in the first winding section, the number of turns in the second winding section, and the number of turns in the fifth winding section are different. The number of turns in the third winding section, the fourth winding section, and the sixth winding section are different.

5. A rotary electric motor system, comprising: A rotating electric motor having a first phase winding and a second phase winding; and A power supply circuit that supplies power to the rotary motor, wherein, The first phase winding has a first winding section and a second winding section. The second phase winding has a third winding section and a fourth winding section. The power supply circuit includes: A first circuit, which is connected to a power source and to the first phase winding; and The second circuit is connected in parallel with the first circuit relative to the power supply and is also connected to the second phase winding. The first circuit includes: The first to third arms, wherein the upper arm with the switching element is connected to the lower arm with the switching element at its midpoint; as well as First switch, The midpoint of the first arm is connected to one end of the first winding section. The midpoint of the second arm is connected to the other end of the first winding section and one end of the second winding section. The midpoint of the third arm is connected to the other end of the second winding section. The second circuit includes: The fourth to sixth arms, wherein the upper arm with the switching element is connected to the lower arm with the switching element at its midpoint; and Second switch, The midpoint of the fourth arm is connected to one end of the third winding section. The midpoint of the fifth arm is connected to the other end of the third winding and one end of the fourth winding. The midpoint of the sixth arm is connected to the other end of the fourth winding section. The first circuit also has a third switch. The first switch is connected in series with the first winding portion, or is disposed between the switching element of the upper arm and the switching element of the lower arm of the first arm. The third switch is configured in series with the second winding portion, or is configured between the switching element of the upper arm and the switching element of the lower arm of the third arm. The second circuit also has a fourth switch. The second switch is configured in series with the third winding section, or is configured between the switching element of the upper arm and the switching element of the lower arm of the fourth arm. The fourth switch is connected in series with the fourth winding section, or it is disposed between the switching element of the upper arm and the switching element of the lower arm of the sixth arm. The number of turns in the first winding section is different from the number of turns in the second winding section. The number of turns in the third winding is different from the number of turns in the fourth winding.

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