JP2020022364A - Rotating electric machine control system - Google Patents

Abstract

To provide a two-phase rotating electric machine control device for controlling a two-phase three-wire rotating electric machine, which prevents generation of through current when switching a direction of current flowing through each phase, and suppressing no occurrence of torque of the rotating electric machine and to provide a control system for a rotating electric machine.SOLUTION: A two-phase rotating electric machine control device for controlling a two-phase three-wire rotating electric machine including two coils can execute switching control for switching to a predetermined orientation of exciting current, before switching the orientation of the exciting current flowing through any one coil of the two coils, and after reflowing the current flowing through the object coil of switching the orientation of the exciting current.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electric machine control system.

  2. Description of the Related Art Conventionally, there has been known a rotating electrical machine control device that controls driving of a rotating electrical machine by controlling on / off operation of a switching element of an inverter circuit. For example, in a rotating electrical machine control device, a control unit generates a command signal for commanding an on / off operation of a switching element, and a gate driver circuit generates a gate signal of the switching element based on the command signal. When the gate signal generated by the gate driver circuit is output to the gate of the switching element, the switching element is turned on / off based on the gate signal, and the rotating electric machine is driven to rotate.

  For example, there is a rotating electric machine control device that controls the driving of a two-phase rotating electric machine, and there is a rotating electric machine control device that supplies electric power in a two-phase three-wire system. FIG. 9 is a schematic configuration diagram of a conventional control system 100 for a two-phase rotating electrical machine including a rotating electrical machine control device 120 that controls the driving of the two-phase rotating electrical machine. The control system 100 for a two-phase rotating electrical machine includes a power supply device 110, a rotating electrical machine control device 120, an inverter circuit 130, and a two-phase (A-phase and B-phase) rotating electrical machine 140. The rotating electrical machine control device 120 controls the turning on and off of the switching elements Q100 to Q600 and switches the direction of the current flowing in the A phase or the B phase, thereby driving the rotating electrical machine 140 to rotate.

JP 2004-248466 A

  However, in the conventional rotating electrical machine control device, when the direction of the current flowing in the A phase or the B phase is switched, a through current 200 is generated, and the switching elements Q200 and Q500 may be damaged. Further, when switching the direction of the current flowing in the A phase or the B phase, a back electromotive force is generated in the coil of the switched phase. Therefore, a period occurs in which the current supplied from the power supply device 110 does not flow through the A-phase coil and the B-phase coil. Accordingly, there is a period during which no torque for rotating rotating electric machine 140 is generated, and there is a problem that the efficiency of inverter circuit 130 is reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a two-phase electric rotating machine control device for controlling a two-phase three-wire electric rotating machine, which switches the direction of current flowing through each phase. Another object of the present invention is to provide a rotating electrical machine control system that prevents generation of a through current and suppresses generation of torque of the rotating electrical machine.

  One embodiment of the present invention relates to a rotating electric machine including a rotor having a plurality of magnets disposed on an inner peripheral surface thereof, and a stator disposed inside the rotor and having a first coil and a second coil wound thereon. An inverter circuit having a first switching element, a second switching element, a third switching element, a fourth switching element, a fifth switching element, and a sixth switching element; and the first switching element, the second switching element, and the second switching element. Controlling the current flowing in the first coil and the second coil by turning on or off the three switching elements, the fourth switching element, the fifth switching element, and the sixth switching element, A rotating electrical machine control system comprising: a rotating electrical machine control device configured to rotate the first switch. A switching element and the fourth switching element are connected, the second switching element and the fifth switching element are connected, and the third switching element and the sixth switching element are connected. One end of the first coil is connected between the first switching element and the fourth switching element, and the first coil is connected between the third switching element and the sixth switching element. One end of a second coil is connected, and the other end of the first coil and the other end of the second coil are connected between the second switching element and the fifth switching element. The rotating electrical machine control device includes: a path that passes through the second switching element, the first coil, and the fourth switching element; A first energizing control for supplying an exciting current from a power supply to a path passing through the second coil and the sixth switching element; and turning the first switching element on after the first energizing control. Switching, the fourth switching element is turned off, a closed loop is formed by the first coil, the first switching element, and the second switching element, and a current flowing through the first coil is returned by the closed loop. A second energization control for passing the exciting current only through a path passing through the second switching element, the second coil, and the sixth switching element; and after the second energization control, the first switching element Flowing the exciting current through a path that passes through the first coil, the second coil, and the sixth switching element, so that the first coil A third energizing control for switching a direction of the exciting current flowing through the first switching element, the first coil, the fifth switching element, and a path after the third energizing control. A fourth energization control for switching a direction of the exciting current flowing in the second coil by flowing an exciting current to a path passing through the switching element, the second coil, and the fifth switching element; After the energization control, the first switching element is turned off, the fourth switching element is turned on, and a closed loop is formed by the first coil, the fourth switching element, and the fifth switching element. Circulating a current flowing through the first coil in the closed loop, so that the third switching element, the second coil, and the A fifth energization control for flowing the exciting current only through a path passing through the switching element, and after the fifth energization control, the third switching element, the second coil, the first coil, and the fourth switching. A sixth energization control that switches the direction of the excitation current flowing through the first coil by passing the excitation current through a path that passes through the element; Before switching the direction of the exciting current flowing through any one of the coils, the current flowing through the coil whose direction of the exciting current is to be switched is returned, and then the direction of the exciting current is switched to a predetermined direction. It is a rotating electrical machine control system characterized by the above.

  One embodiment of the present invention is the above-described rotating electric machine control system, wherein a first Hall IC and a second Hall IC are arranged close to each other in the plurality of magnets. The apparatus controls the energization of the first coil and the second coil by switching the plurality of switching based on the pulse signals output from the first Hall IC and the second Hall IC. .

  As described above, according to the present invention, there is provided a two-phase rotating electrical machine control device for controlling a two-phase three-wire rotating electrical machine, which prevents generation of a through current when switching the direction of current flowing in each phase. Further, it is possible to provide a two-phase rotating electrical machine control device and a control system for the two-phase rotating electrical machine that suppress generation of torque of the rotating electrical machine.

1 is a diagram illustrating an example of a schematic configuration of a control system for a two-phase rotating electrical machine including a two-phase rotating electrical machine control device according to a first embodiment; FIG. 2 is a diagram illustrating an example of a schematic configuration of a two-phase rotating electric machine 30 according to the first embodiment. FIG. 5 is a diagram illustrating an energization pattern # 1 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 4 is a diagram illustrating an energization pattern # 2 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 4 is a diagram illustrating an energization pattern # 3 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 7 is a diagram illustrating an energization pattern # 4 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 5 is a diagram illustrating an energization pattern # 5 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 6 is a diagram illustrating an energization pattern # 6 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 7 is a diagram illustrating an energization pattern # 7 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 7 is a diagram illustrating an energization pattern # 8 of the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 5 is a diagram illustrating an example of a switching timing of each energization pattern # 1 to # 8 by the two-phase rotating electrical machine control device 40 according to the first embodiment. FIG. 9 is a diagram illustrating an example of a switching timing of an energization pattern performed by a two-phase rotating electrical machine control device 40 according to a modified example of the first embodiment. It is a figure showing an example of the schematic structure of control system 1A for two-phase rotary electric machines provided with two-phase rotary electric machine control device 40A in a 2nd embodiment. FIG. 9 is a diagram illustrating an energization pattern # 1 of a two-phase rotating electrical machine control device 40A according to a second embodiment. FIG. 11 is a diagram for describing an energization pattern # 2 ′ of a two-phase rotating electrical machine control device 40A according to a second embodiment. It is a figure explaining electric current pattern # 3 of 40 A of two-phase rotary electric machines control in a 2nd embodiment. It is a figure explaining electric conduction pattern # 4 'of 40 A of two-phase rotary electric machines control devices in 2nd Embodiment. FIG. 9 is a diagram for describing an energization pattern # 5 of a two-phase rotating electrical machine control device 40A according to the second embodiment. FIG. 14 is a diagram for describing an energization pattern # 6 ′ of the two-phase rotating electrical machine control device 40A according to the second embodiment. It is a figure explaining electric current pattern # 7 of 40 A of two-phase rotary electric machines control in a 2nd embodiment. FIG. 11 is a diagram for describing an energization pattern # 8 ′ of the two-phase rotating electrical machine control device 40A according to the second embodiment. FIG. 2 is a schematic configuration diagram in which a plurality of coils are configured as a coil group connected in parallel and in series. 1 is a schematic configuration diagram of a conventional two-phase rotating electric machine control system 100 including a rotating electric machine control device 120 that controls driving of a two-phase rotating electric machine.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all combinations of the features described in the embodiments are necessarily essential to the solution of the invention. In the drawings, the same or similar portions are denoted by the same reference numerals, and redundant description may be omitted. In addition, shapes and sizes of elements in the drawings may be exaggerated for clearer description.

The two-phase rotary electric machine control device according to the embodiment is a two-phase rotary electric machine control device that controls a two-phase three-wire type rotary electric machine including two coils, and flows into one of the two coils. Before switching the direction of the exciting current, it is possible to execute switching control for switching to a predetermined direction of the exciting current after recirculating the current flowing through the target coil for switching the direction of the exciting current.
Hereinafter, a two-phase rotating electrical machine control device according to an embodiment will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating an example of a schematic configuration of a control system 1 for a two-phase rotating electrical machine including a two-phase rotating electrical machine control device 40 according to the first embodiment. As shown in FIG. 1, the control system 1 for a two-phase rotating electric machine includes a power supply device 10, an inverter circuit 20, a two-phase rotating electric machine 30, and a two-phase rotating electric machine control device 40.

FIG. 2 is a diagram illustrating an example of a schematic configuration of the two-phase rotating electric machine 30 according to the first embodiment. The two-phase rotating electric machine 30 is, for example, an outer rotor type rotating electric machine mounted on a motorcycle. The two-phase rotating electric machine 30 includes a bottomed cylindrical rotor (flywheel) 31 that rotates synchronously with a crankshaft (not shown) of the engine, and a stator 32 fixed to an engine block (not shown).
The stator 32 is provided radially inside the rotor 31. A two-phase coil of the A-phase coil 30a or the B-phase coil 30b is wound around the stator 32. In the present embodiment, the A-phase coil 30a and the B-phase coil 30b are each a coil group including a plurality of coils. However, the A-phase coil 30a and the B-phase coil 30b are not limited to this, and may be configured by at least one or more coils.

  A plurality of tile-shaped rotor magnets 33 are arranged on the inner peripheral surface side of the peripheral wall 31c of the rotor 31 so that the magnetic poles are arranged in order along the circumferential direction. For example, the rotor magnet 33 is a ferrite magnet. On the other hand, the stator 32 includes a plurality of teeth 34 protruding radially outward.

The teeth 34 have a substantially T-shaped cross section. The plurality of teeth 34 are respectively arranged at equal intervals in the circumferential direction. The teeth 34 include a winding drum 36 and a tip 37. The winding drum 36 is formed so as to extend in the radial direction.
The distal end portion 37 is integrally formed with the radially outer distal end of the winding drum portion 36 and is formed so as to extend in the circumferential direction. The distal end portion 37 is formed so that the center in the circumferential direction is located at the distal end of the winding drum portion 36. A dovetail-shaped slot 38 is formed between adjacent teeth 34. The armature coil 39 is passed through the slot 38, and the armature coil 39 is wound around each of the teeth 34 to which an insulating insulator (not shown) is attached. That is, the corresponding A-phase coil 30a or B-phase coil 30b is passed through each slot 38, and the A-phase coil 30a or B-phase coil 30b is wound around each tooth 34. In the first embodiment, the A-phase coil 30a is wound around the six teeth 34 present in the portion X in FIG. A B-phase coil 30b is wound around the six teeth 34 present in the Y section in FIG. In the first embodiment, the armature coil 39 wound around the six teeth 34 present in the X part in FIG. 2 is the A-phase coil 30a, and the six teeth 34 present in the Y part in FIG. The wound armature coil 39 is a B-phase coil 30b.

  Hereinafter, the number P of magnetic poles (the number of rotor magnets 33) and the number of teeth 34 in the two-phase rotating electric machine 30 will be described. When the current supplied from the power supply device 10 is supplied to the armature coil 39, the two-phase rotating electric machine 30 generates a magnetic flux in the teeth 34, and generates a magnetic flux between the magnetic flux and the rotor magnet 33 of the rotor 31. An attractive force or repulsive force is generated, and the rotor 31 rotates. However, when the segment-type rotor magnets 33 are used, a gap is formed between the rotor magnets 33, so that a change in magnetic flux increases at both circumferential ends of the rotor magnets 33. For this reason, when each tooth 34 passes through both ends of the rotor magnet 33, the magnetic attraction force and repulsion force on each tooth 34 greatly change, and the cogging torque increases. Therefore, by setting the number P of the magnetic poles and the number S of the teeth 34 so as to satisfy the following equation (1), the two-phase rotating electric machine 30 having a low cogging torque is obtained.

  Note that n is a natural number. However, when n ≦ 2, the contribution to the reduction of the cogging torque is small. Further, even when the number P of the magnetic poles and the number S of the teeth 34 are integral multiples, the expression (1) is satisfied.

Hereinafter, it will be described that the two-phase rotating electric machine 30 has low cogging torque when the number P of the magnetic poles and the number S of the teeth 34 satisfy Expression (1).
The pole angle (mechanical angle) θ1, which is the angle between the adjacent rotor magnets 33, is expressed by the following equation (2).

  The angle (mechanical angle) θ2 between adjacent teeth 34 in the stator 32 is represented by the following equation (3).

  From the equations (2) and (3), the phase difference (electrical angle) α between the rotor magnet 33 and the teeth 34 is expressed by the following equation (4).

  Here, assuming that the angle when the center of the first tooth 34 coincides with the center of the rotor magnet 33 is 0 ° and the amplitude of the back electromotive voltage is 1, the combined back electromotive force E is expressed by the following equation ( 5).

  As shown in Expression (5), as the phase difference | α | increases, the section where the back electromotive force cancels out becomes longer, and the combined back electromotive voltage E decreases. On the other hand, if the phase difference | α | is small, the section where the back electromotive force cancels out becomes short, and the combined back electromotive voltage E becomes high. That is, the efficiency of the two-phase rotating electric machine 30 is better when the phase difference α is closer to 0. Here, since the phase difference α is represented by Expression (4), it is ideal that the value of (the number P of magnetic poles) / (the number S of the teeth 34) is close to 1. However, when the number P of the magnetic poles and the number S of the teeth 34 are the same (P = S), the structure as a two-phase rotating electric machine cannot be established. In order to realize the structure as a two-phase rotating electric machine, it is essential that the number S of the teeth 34 be a multiple of 4 and the number P of the magnetic poles be a multiple of 2. Therefore, when the two-phase rotating electric machine 30 satisfies the expression (1), a low cogging torque is obtained, and an efficient two-phase rotating electric machine configuration is obtained. In the first embodiment, the number P of the magnetic poles is 14, and the number S of the teeth 34 is 12.

  Returning to FIG. 1, the inverter circuit 20 converts DC power supplied from the power supply device 10 into AC power and applies the AC power to the two-phase rotating electric machine 30. The inverter circuit 20 includes six switching elements 211 to 216. Inverter circuit 20 converts DC power to AC power by switching on and off switching elements 211 to 216 based on a drive signal supplied from two-phase rotating electrical machine control device 40.

  The switching elements 211 and 214 connected in series, the switching elements 212 and 215 connected in series, and the switching elements 213 and 216 connected in series are connected between the high potential side of the power supply device 10 and the ground potential. Are connected in parallel. One end of the A-phase coil 30a is connected to a connection point between the switching element 211 and the switching element 214. One end of the B-phase coil 30b is connected to a connection point between the switching element 213 and the switching element 216. The other end of the A-phase coil 30a and the other end of the B-phase coil 30b are connected to a connection point between the switching element 212 and the switching element 215. For example, the switching elements 211 to 216 are FETs (Field Effect Transistor; Field Effect Transistor) or IGBTs (Insulated Gate Bipolar Transistor; Insulated Gate Bipolar Transistor). Each of the switching elements 211 to 216 may have a configuration connected in parallel with the freewheeling diode.

  The two-phase rotating electrical machine control device 40 switches the energization pattern for energizing the A-phase coil 30a and the B-phase coil 30b by controlling the switching elements 211 to 216 to be on and off. That is, the two-phase rotating electrical machine control device 40 controls the direction of the current flowing to each of the A-phase coil 30a and the B-phase coil 30b by controlling the on and off of the switching elements 211 to 216. In other words, the two-phase rotating electrical machine control device 40 turns on the switching elements 211 to 216 so as to switch the direction of the current flowing through the A-phase coil 30a or the B-phase coil 30b by sequentially using a plurality of preset energizing patterns. And off and on. Thereby, the two-phase rotating electrical machine control device 40 generates an attractive force or a repulsive force between the rotor magnet 33 and the teeth 34 by switching the direction of the magnetic flux of the A-phase coil 30a or the B-phase coil 30b, 31 is rotated. However, at the timing of switching the direction of the current flowing through the A-phase coil 30a or the B-phase coil 30b, the two-phase rotating electrical machine control device 40 converts the current flowing through the armature coil 39 whose current direction switches to the electric motor. The child coil 39 is returned. That is, at the timing of switching the direction of the current flowing through the A-phase coil 30a or the B-phase coil 30b, the two-phase rotating electrical machine control device 40 converts the current flowing through the armature coil 39 whose current direction switches to the electric motor. On / off of the switching elements 211 to 216 is controlled so as to form a closed loop for returning to the slave coil 39. Thus, the influence of the self-induction of the armature coil 39 generated by switching the direction of the current can be reduced. That is, the effect of self-induction means that back electromotive force is generated by self induction of the armature coil 39, and the back electromotive force prevents an exciting current from flowing through the armature coil 39. Due to the effect of the self-induction, the armature coil 39 cannot be magnetized, and no attractive force or repulsive force can be generated between the rotor magnet 33 and the teeth 34. Therefore, torque for rotating the rotor 31 cannot be generated. The two-phase rotating electric machine control device 40 reduces the influence of self-induction by forming a closed loop that recirculates the current to the armature coil 39 where the current direction switches at the timing of switching the direction of the current flowing through the armature coil 39. Thus, a path through which the exciting current flows can be secured. Therefore, the two-phase rotating electrical machine control device 40 can prevent the armature coil 39 from being magnetized and rotate the rotor 31 at the timing of switching the direction of the current flowing through the armature coil 39.

  The energization patterns of the two-phase rotating electrical machine control device 40 according to the first embodiment include four energization patterns (energization patterns # 1, # 3, # 5, and # 5) that alternately reversely excite the A-phase coil 30a and the B-phase coil 30b. # 7), and a closed loop for returning the current flowing through the armature coil 39 to be reverse-excited to the armature coil 39, to form an energization pattern (energization patterns # 2, # 4, # 6, # 8). For example, when the direction of the current flowing through the A-phase coil 30a is switched, that is, when the A-phase coil 30a is reversely excited, the two-phase rotating electrical machine control device 40 converts the current flowing through the A-phase coil 30a into A On / off of the switching elements 211 to 216 is controlled so as to form a closed loop for returning to the phase coil 30a. After a certain time has passed since the formation of the closed loop, the two-phase rotating electrical machine control device 40 opens the closed loop and reversely excites the A-phase coil 30a.

  For example, the two-phase rotating electrical machine control device 40 switches the energization pattern based on the rotation angle of the rotor 31. The method for detecting the rotation angle of the rotor 31 is not particularly limited. For example, the rotation angle of the rotor 31 is detected using a magnetic rotary encoder having a Hall IC. In this case, the first Hall IC and the second Hall IC are arranged near the position facing the rotor magnet 33. The first Hall IC and the second Hall IC are arranged with a predetermined phase difference (for example, a phase difference of 90 °) from each other. Therefore, a change in magnetic flux density detected when the rotor 31 rotates and the rotor magnet 33 passes in front of the first Hall IC and the second Hall IC is used as an electric signal to form two phases (A phase and B phase) having different phases from each other. ) Is generated and output to the two-phase rotating electrical machine control device 40. Thereby, the two-phase rotating electrical machine control device 40 detects the rotation angle of the rotor 31 based on the pulse signals supplied from the first Hall IC and the second Hall IC. In the first embodiment, the pulse signal supplied from the first Hall IC is H1, and the pulse signal supplied from the second Hall IC is H2.

  The two-phase rotating electrical machine control device 40 may be realized by hardware, may be realized by software, or may be realized by a combination of hardware and software. In addition, the computer may function as a part of the two-phase rotating electrical machine control device 40 by executing the program. The program may be stored in a computer-readable medium, or may be stored in a storage device connected to a network.

  Hereinafter, an energization pattern of the two-phase rotating electrical machine control device 40 according to the first embodiment will be described.

  FIG. 3 is a diagram illustrating energization patterns # 1 to # 8 of the two-phase rotating electrical machine control device 40 according to the first embodiment. 3A to 3H show the flow of current flowing through the A-phase coil 30a and the B-phase coil 30b in each of the energization patterns # 1 to # 8. Note that the switching elements 211 to 216 indicated by broken lines indicate an off state, and the switching elements 211 to 216 indicated by solid lines indicate an on state. Arrows indicate the direction of current flow in the A-phase coil 30a and the B-phase coil 30b. The energization patterns # 1 to # 8 are patterns that can drive the two-phase rotating electric machine 30. The two-phase rotating electrical machine control device 40 repeats the switching of the energization patterns in the order of the energization patterns # 1, # 2, # 3, # 4, # 5, # 6, # 7, and # 8 to repeat the two-phase The rotary electric machine 30 is driven to rotate. When starting the two-phase rotating electric machine 30, the two-phase rotating electric machine control device 40 turns on the switching elements 211 to 216 by using an arbitrary energizing pattern among the energizing patterns # 1 to # 8. Off may be controlled. That is, the two-phase dynamo-electric machine control device 40 of the first embodiment is characterized by the order of the energization patterns to be switched, and is not particularly limited to the energization pattern when the two-phase dynamoelectric machine 30 is started.

(Electrification pattern # 1)
FIG. 3A is a diagram illustrating an energization pattern # 1 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 1, the switching elements 211, 213, and 215 are off, and the switching elements 212, 214, and 216 are on. Therefore, the current Ia flows to the A-phase coil 30a via the switching element 212, and the current Ib flows to the B-phase coil 30b. That is, the current supplied from the power supply device 10 passes through the switching element 212, the A-phase coil 30a, the switching element 214, and the ground, and passes through the switching element 212, the B-phase coil 30b, the switching element 216, and the ground. (See FIG. 3A). Thereby, the A-phase coil 30a and the B-phase coil 30b are excited.

(Electrification pattern # 2)
FIG. 3B is a diagram illustrating an energization pattern # 2 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 2, the switching elements 213, 214, and 215 are off and the switching elements 211, 212, and 216 are on. Therefore, the current Ia flowing through the A-phase coil 30a flows through the switching element 211 and the switching element 212 and returns to the A-phase coil 30a. That is, in the energization pattern # 2, the two-phase rotating electrical machine control device 40 turns on the switching element 211 and turns off the switching element 214 from the energization pattern # 1, thereby turning on the A-phase coil 30a, the switching element 211, and the switching element. Element 212 forms a closed loop. At this time, the current supplied from the power supply device 10 passes only through a path passing through the switching element 212, the B-phase coil 30b, the switching element 216, and the ground (see FIG. 3B). Thus, the A-phase coil 30a is not excited, but the B-phase coil 30b is excited. That is, the two-phase rotating electrical machine control device 40 secures a path for flowing the exciting current to the B-phase coil 30b by forming a closed circuit for returning the current to be switched with the current flowing in the A-phase coil 30a as the switching target. be able to.

(Electrification pattern # 3)
FIG. 3C is a diagram illustrating an energization pattern # 3 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 3, the switching elements 212, 213, 214, and 215 are off, and the switching elements 211 and 216 are on. Therefore, the current Ic flows through the A-phase coil 30a and the B-phase coil 30b via the switching element 211. That is, the current supplied from the power supply device 10 passes through a path passing through the switching element 211, the A-phase coil 30a, the B-phase coil 30b, the switching element 216, and the ground (see FIG. 3C). Therefore, the direction of the current flowing through the B-phase coil 30b does not change compared to the energization pattern # 1, but the current flowing through the A-phase coil 30a is reversed. Therefore, the A-phase coil 30a is reversely excited.

  As described above, by switching the energizing pattern from energizing pattern # 1 to energizing pattern # 3, the direction of the current flowing through the A-phase coil 30a is reversed to excite the A-phase coil 30a. By switching to the pattern # 2, the current flowing through the A-phase coil 30a is circulated, and thereafter, the current is switched to the energization pattern # 3. Thereby, when the A-phase coil 30a is reversely excited, the influence of the self-induction of the A-phase coil 30a can be reduced, so that a sufficient exciting current can flow through the B-phase coil 30b. Therefore, when the A-phase coil 30a is reversely excited, a torque for rotating the two-phase rotating electric machine 30 can be generated, so that the two-phase rotating electric machine 30 can be efficiently driven.

(Electrification pattern # 4)
FIG. 3D is a diagram illustrating an energization pattern # 4 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 4, the switching elements 212, 213, and 214 are off, and the switching elements 211, 215, and 216 are on. Therefore, the current Ib flowing through the B-phase coil 30b flows through the switching element 216 and the switching element 215 and returns to the B-phase coil 30b. That is, in the energization pattern # 4, the two-phase rotating electrical machine control device 40 turns on the switching element 215 from the energization pattern # 3, whereby a closed loop is formed by the B-phase coil 30b, the switching element 216, and the switching element 215. . At this time, the current supplied from the power supply device 10 passes only through a path passing through the switching element 211, the A-phase coil 30a, the switching element 215, and the ground (see FIG. 3D). Thus, the B-phase coil 30b is not excited, but the A-phase coil 30a is excited. That is, the two-phase rotating electrical machine control device 40 reduces the influence of self-induction of the B-phase coil 30b by forming a closed circuit that returns the current to be switched with the current flowing in the B-phase coil 30b as the switching target. Can be.

(Electrification pattern # 5)
FIG. 3E is a diagram showing an energization pattern # 5 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 5, the switching elements 212, 214, and 216 are off, and the switching elements 211, 213, and 215 are on. Therefore, the current Ia flows to the A-phase coil 30a via the switching element 211, and the current Ib flows to the B-phase coil 30b via the switching element 213. That is, the current supplied from the power supply device 10 passes through the switching element 211, the A-phase coil 30a, the switching element 215, and the ground, and the current through the switching element 213, the B-phase coil 30b, the switching element 215, and the ground. (See FIG. 3E). Therefore, the direction of the current flowing through the A-phase coil 30a does not change compared to the energization pattern # 3, but the current flowing through the B-phase coil 30b is reversed. Therefore, the B-phase coil 30b is reversely excited.

  As described above, by switching the energization pattern from energization pattern # 3 to energization pattern # 5, the direction of the current flowing through B-phase coil 30b is reversed to excite B-phase coil 30b in reverse. By switching to the pattern # 4, the current flowing through the B-phase coil 30b is circulated, and thereafter, the current is switched to the conduction pattern # 5. Accordingly, when the B-phase coil 30b is reversely excited, the influence of the self-induction of the B-phase coil 30b can be reduced, so that a sufficient exciting current can flow through the A-phase coil 30a. Therefore, when the B-phase coil 30b is reversely excited, a torque for driving the two-phase rotating electric machine 30 to rotate can be generated, so that the two-phase rotating electric machine 30 can be efficiently driven.

(Electrification pattern # 6)
FIG. 3F is a diagram illustrating an energization pattern # 6 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 6, the switching elements 211, 212, and 216 are off, and the switching elements 213, 214, and 215 are on. Therefore, the current Ia flowing through the A-phase coil 30a flows through the switching element 215 and the switching element 214 and returns to the A-phase coil 30a. That is, in the energization pattern # 6, the two-phase rotating electrical machine control device 40 turns off the switching element 211 and turns on the switching element 214 from the energization pattern # 5, so that the A-phase coil 30a, the switching element 214, and the switching element Element 215 forms a closed loop. At this time, the current supplied from the power supply device 10 passes only through a path passing through the switching element 213, the B-phase coil 30b, the switching element 215, and the ground (see FIG. 3F). Thus, the A-phase coil 30a is not excited, but the B-phase coil 30b is excited. The two-phase rotating electrical machine control device 40 secures a path through which the exciting current flows through the B-phase coil 30b by forming a closed circuit that returns the current to be switched to the current flowing through the A-phase coil 30a as a switching target. it can.

(Electrification pattern # 7)
FIG. 3G is a diagram illustrating an energization pattern # 7 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 7, the switching elements 211, 212, 215, and 216 are in the off state, and the switching elements 213 and 214 are in the on state. Therefore, current Ic flows through B-phase coil 30b and A-phase coil 30a via switching element 213. That is, the current supplied from the power supply device 10 passes through a path passing through the switching element 213, the B-phase coil 30b, the A-phase coil 30a, the switching element 214, and the ground (see FIG. 3G). Therefore, the direction of the current flowing through the B-phase coil 30b does not change compared to the energization pattern # 5, but the current flowing through the A-phase coil 30a is reversed. Therefore, the A-phase coil 30a is reversely excited.

  As described above, by switching the energization pattern from energization pattern # 5 to energization pattern # 7, the direction of the current flowing through A-phase coil 30a is reversed to excite A-phase coil 30a in reverse. By switching to the pattern # 6, the current flowing through the A-phase coil 30a is circulated, and thereafter, the current is switched to the conduction pattern # 7. Thereby, when the A-phase coil 30a is reversely excited, the influence of the self-induction of the A-phase coil 30a can be reduced, so that a sufficient exciting current can flow through the B-phase coil 30b. Therefore, when the A-phase coil 30a is reversely excited, a torque for rotating the two-phase rotating electric machine 30 can be generated, so that the two-phase rotating electric machine 30 can be efficiently driven.

(Electrification pattern # 8)
FIG. 3H is a diagram illustrating an energization pattern # 8 of the two-phase rotating electrical machine control device 40 according to the first embodiment.
In the energization pattern # 8, the switching elements 211, 215, and 216 are off, and the switching elements 212, 213, and 214 are on. Therefore, the current Ib flowing through the B-phase coil 30b passes through the switching element 212 and the switching element 213 and returns to the B-phase coil 30b. That is, in the energization pattern # 8, the two-phase rotating electrical machine control device 40 turns on the switching element 212 from the energization pattern # 7, whereby a closed loop is formed by the B-phase coil 30b, the switching element 212, and the switching element 213. . At this time, the current supplied from the power supply device 10 passes only through a path passing through the switching element 212, the A-phase coil 30a, the switching element 214, and the ground (see FIG. 3H). Thus, the B-phase coil 30b is not excited, but only the A-phase coil 30a is excited. Therefore, when the energizing pattern is switched from energizing pattern # 8 to energizing pattern # 1, the direction of the current flowing through A-phase coil 30a does not change, but the current flowing through B-phase coil 30b reverses. Therefore, the B-phase coil 30b is reversely excited. The two-phase rotating electrical machine control device 40 can reduce the influence of self-induction of the B-phase coil 30b by forming a closed circuit that returns the current to be switched with the current flowing in the B-phase coil 30b as the switching target. .

  As described above, by switching the energizing pattern from energizing pattern # 7 to energizing pattern # 1, the direction of the current flowing through B-phase coil 30b is reversed to excite B-phase coil 30b, but energizing from energizing pattern # 7. By switching to the pattern # 8, the current flowing through the B-phase coil 30b is circulated, and thereafter, the current is switched to the conduction pattern # 1. Accordingly, when the B-phase coil 30b is reversely excited, the influence of the self-induction of the B-phase coil 30b can be reduced, so that a sufficient exciting current can flow through the A-phase coil 30a. Therefore, when the B-phase coil 30b is reversely excited, a torque for driving the two-phase rotating electric machine 30 to rotate can be generated, so that the two-phase rotating electric machine 30 can be efficiently driven.

  FIG. 4 is a diagram illustrating an example of the switching timing of the energization patterns # 1 to # 8 by the two-phase rotating electrical machine control device 40 according to the first embodiment. In FIG. 4, when the signal corresponding to each of the switching elements 211 to 216 is at an H level, it indicates that the switching element is on, and when it is at an L level, it indicates that the switching element is off. . FIG. 4 is an example of the switching timing of each of the energization patterns # 1 to # 8 when the advance angle is 0 °.

As shown in FIG. 4, the two-phase rotating electrical machine control device 40 detects the rotation angle of the rotor 31 based on the pulse signal H1 and the pulse signal H2. Then, the two-phase rotating electrical machine control device 40 sequentially switches the energization patterns # 1 to # 8 for each rotation angle of the rotor 31 of 45 °.
The two-phase rotating electrical machine control device 40 according to the present embodiment switches the direction of the current flowing in one of the two coils of the A-phase coil 30a and the B-phase coil 30b when switching the direction of the current. Although the current flowing through the coil for switching the direction is recirculated, the present invention is not limited to this. For example, the two-phase rotating electrical machine control device 40 controls at least one of a plurality of timings for switching the direction of the current flowing in one of the two coils of the A-phase coil 30a and the B-phase coil 30b. At the timing, the current flowing through the coil for switching the direction of the current is returned. For example, the plurality of timings are the timing of directly switching from the energization pattern # 1 to # 3 shown in FIG. 3, the timing of directly switching from # 3 to # 5, the timing of directly switching from # 5 to # 7, and the timing from # 7 to # 1. The switching timing of the four energization patterns of the direct switching timing is shown. That is, the two-phase rotating electrical machine control device 40 only needs to include at least one energizing pattern among the energizing patterns # 2, # 4, # 6, and # 8 that are the energizing patterns forming the closed circuit.

  As described above, the two-phase rotating electrical machine control device 40 in the first embodiment determines the direction of the exciting current flowing in one of the two coils of the A-phase coil 30a and the B-phase coil 30b. Before the switching, it is possible to execute switching control for switching to a predetermined direction of the exciting current after recirculating the current flowing through the coil whose direction of the exciting current is to be switched. Thereby, when switching the direction of the current flowing through (the coil of) the A phase or the B phase, it is possible to prevent the generation of the through current and to suppress the generation of the torque of the rotating electric machine.

  Hereinafter, a modified example of the two-phase rotating electrical machine control device 40 according to the first embodiment will be described. FIG. 5 is a diagram illustrating an example of a switching timing of the energization pattern performed by the two-phase rotating electrical machine control device 40 according to the modified example of the first embodiment.

The two-phase rotating electrical machine control device 40 of the present modification includes an energizing pattern in which the energizing pattern # 4 and the energizing pattern # 8 are omitted from the energizing patterns # 1 to # 8 in the first embodiment. That is, the two-phase rotating electric machine control device 40 of the present modification repeatedly switches the energizing patterns in the order of the energizing patterns # 1, # 2, # 3, # 5, # 6, and # 7 to repeat the two-phase rotating electric machine control. 30 is rotationally driven. As a result, the two-phase rotating electrical machine control device 40 of the present modified example has a smaller number of energization patterns than in the first embodiment, so that control of the switching elements 211 to 216 can be simplified. For example, the two-phase rotating electrical machine control device 40 controls the switching elements 211 to 216 based on the rising or falling timing of the pulse signal H1 and the pulse signal H2 supplied from the first Hall IC and the second Hall IC, respectively. Control the ON state and the OFF state. At that time, as shown in FIG. 5, the two-phase rotating electrical machine control device 40 performs switching at the rising or falling timing of the pulse signal H1 and the pulse signal H2 in the energization patterns # 1, # 3, # 5, and # 7. The on / off state of the elements 211 to 216 can be controlled. In the energization patterns # 2, # 4, # 6, and # 8, the switching elements 211 to 216 are activated at the rising or falling timing of the pulse signal H1 and the pulse signal H2. The on or off state cannot be controlled. Therefore, when switching from the energization pattern # 1 to the energization pattern # 2, the two-phase rotating electrical machine control device 40 switches to the energization pattern # 2 after counting a certain time from the rising timing of the pulse signal H1. That is, the two-phase rotating electrical machine control device 40 needs to perform a time counting process (hereinafter, referred to as a “time counting process”) when performing the energization patterns # 2, # 4, # 6, and # 8. . Therefore, by omitting the energization patterns # 4 and # 8, the timekeeping process of the two-phase rotating electrical machine control device 40 can be reduced as compared with the first embodiment.
The reason why the energizing patterns # 4 and # 8 can be omitted will be described below.

  When the energization pattern is switched from energization pattern # 3 to energization pattern # 5 without passing through energization pattern # 4, a closed loop for circulating the current flowing through B-phase coil 30b is not formed. Cannot reduce the effects of Similarly, when the energization pattern is switched from energization pattern # 7 to energization pattern # 1, a closed loop for circulating the current flowing through B-phase coil 30b is not formed, so that the effect of self-induction of B-phase coil 30b can be reduced. Can not. That is, there is a period during which no torque for rotating the two-phase rotating electric machine 30 is generated.

  However, in the case of the energization pattern # 3, since the switching elements 212 to 215 are in the off state, the current supplied from the power supply device 10 passes through a path in which the A-phase coil 30a and the B-phase coil 30b are connected in series. . In the case of the energization pattern # 7, since the switching elements 211, 212, 215, and 216 are in the off state, the current (excitation current) supplied from the power supply device 10 is the same as that of the energization pattern # 3. The phase coil 30b passes through a path connected in series. The electric resistance of the path in which the A-phase coil 30a and the B-phase coil 30b are connected in series is a resistance value (Ra + Rb) obtained by adding the resistance value Ra of the A-phase coil 30a and the resistance value Rb of the B-phase coil 30b. . In the embodiment described below, a case where the resistance value Ra and the resistance value Rb are the same resistance value Rc will be described for convenience. That is, it is assumed that the A-phase coil 30a and the B-phase coil 30b have the same inductance. Therefore, the electric resistance of the path in which the A-phase coil 30a and the B-phase coil 30b are connected in series is 2Rc. On the other hand, in the energization pattern # 1 or the energization pattern # 5, the path through which the current supplied from the power supply device 10 passes is the path through any one of the armature coils 39 of the A-phase coil 30a and the B-phase coil 30b. . That is, the path through which the current supplied from the power supply device 10 passes is not a path in which the A-phase coil 30a and the B-phase coil 30b are connected in series, but a path through only the A-phase coil 30a or the B-phase coil 30b. is there. That is, the electric resistance of the path passing only through the A-phase coil 30a or the B-phase coil 30b is Rc. Therefore, assuming that the voltage of power supply device 10 is 12 V, a 6 V voltage is applied to each of A-phase coil 30 a and B-phase coil 30 b in the path in which A-phase coil 30 a and B-phase coil 30 b are connected in series. The voltage is being applied. On the other hand, in a path passing only through the A-phase coil 30a or the B-phase coil 30b, a voltage of 12 V is applied to the A-phase coil 30a or the B-phase coil 30b. That is, the energization patterns # 3 and # 7 forming a path in which the A-phase coil 30a and the B-phase coil 30b are connected in series are # 1 including a path passing only through the A-phase coil 30a or the B-phase coil 30b. Compared with # 5, the current flowing through the A-phase coil 30a or the B-phase coil 30b is smaller.

  Generally, the energy stored in the exciting coil is proportional to the product of the square of the current flowing in the exciting coil and the inductance. Therefore, the back electromotive force increases as the current flowing through the exciting coil increases. As a result, the energy stored in the A-phase coil 30a and the B-phase coil 30b is larger in the energization patterns # 1 and # 5 than in the energization patterns # 3 and # 7. That is, the back electromotive force generated when the B-phase coil 30b is reversely excited from the energization patterns # 3 and # 7 (energization patterns # 3 → # 5, # 7 → # 1) changes from the energization patterns # 1 and # 5. The back electromotive force is smaller than the back electromotive force generated when the A-phase coil 30a is back-excited (energization pattern # 1 → # 3, # 5 → # 7). Therefore, during the period during which the torque of the two-phase rotating electric machine 30 is not generated by the reverse excitation (hereinafter, referred to as “torque non-generation period”), the energization pattern # 1 →→ rather than the energization patterns # 3 → # 5 and # 7 → # 1. # 3, # 5 → # 7 are shorter. As a result, if the torque non-generation periods of the energization patterns # 3 → # 5 and # 7 → # 1 can be tolerated, the reverse excitation period in which the torque non-generation period is long (the energization patterns # 1 → # 3, # 5) → In # 7), the reverse excitation is performed after using the energizing pattern # 2 and the energizing pattern # 6 forming the closed loop, respectively, and the energizing pattern # 4 and the energizing pattern # 8 can be omitted.

  Therefore, according to the above-described modification, the same effects as those of the first embodiment can be obtained, and the control of the switching elements 211 to 216 can be simplified.

(Second embodiment)
Hereinafter, a two-phase rotating electrical machine control device 40A according to the second embodiment will be described.
FIG. 6 is a diagram illustrating an example of a schematic configuration of a two-phase rotating electrical machine control system 1A including a two-phase rotating electrical machine control device 40A according to the second embodiment. As shown in FIG. 6, the control system 1A for a two-phase rotating electrical machine includes a power supply device 10, an inverter circuit 20, a two-phase rotating electrical machine 30, and a two-phase rotating electrical machine control device 40A. The two-phase rotating electrical machine control device 40A according to the second embodiment is different from the first embodiment in that a closed loop that allows the current flowing in the armature coil 39 whose current direction is switched to flow back to the armature coil 39 is provided. Are formed in different paths.

  The two-phase rotating electrical machine control device 40A switches the energization pattern for energizing the A-phase coil 30a and the B-phase coil 30b by controlling ON and OFF of the switching elements 211 to 216. That is, the two-phase rotating electrical machine control device 40A controls the direction of the current flowing through each of the A-phase coil 30a and the B-phase coil 30b by controlling the on and off of the switching elements 211 to 216. In other words, the two-phase rotating electrical machine control device 40A turns on the switching elements 211 to 216 so as to switch the direction of the current flowing through the A-phase coil 30a or the B-phase coil 30b by sequentially using a plurality of preset energizing patterns. And off and on. Thereby, the two-phase rotating electrical machine control device 40A generates an attractive force or a repulsive force between the rotor magnet 33 and the teeth 34 by switching the direction of the magnetic flux of the A-phase coil 30a or the B-phase coil 30b, 31 is rotated.

  The energization patterns of the two-phase rotating electrical machine control device 40A according to the second embodiment include four energization patterns (energization patterns # 1, # 3, # 5, and # 5) that alternately reversely excite the A-phase coil 30a and the B-phase coil 30b. # 7) and a closed loop for returning a current flowing in the armature coil 39 to be reverse-excited to the armature coil 39 is formed by an energization pattern (energization patterns # 2 ′, # 4 ′, # 4) formed before the reverse excitation. 6 ', # 8'). For example, when the direction of the current flowing through the A-phase coil 30a is switched, that is, when the A-phase coil 30a is reversely excited, the two-phase rotating electrical machine control device 40A converts the current flowing through the A-phase coil 30a into A On / off of the switching elements 211 to 216 is controlled so as to form a closed loop for returning to the phase coil 30a. After a certain period of time has passed since the formation of the closed loop, the two-phase rotating electrical machine control device 40A opens the closed loop and reversely excites the A-phase coil 30a. Note that the two-phase rotating electrical machine control device 40A may switch the energization pattern based on the rising timing and the falling timing of the pulse signals H1 and H2 supplied from the first Hall IC and the second Hall IC.

  The two-phase rotating electrical machine control device 40A may be realized by hardware, software, or a combination of hardware and software. In addition, the computer may function as a part of the two-phase rotating electrical machine control device 40 by executing the program. The program may be stored in a computer-readable medium, or may be stored in a storage device connected to a network.

  Hereinafter, an energization pattern of the two-phase rotating electrical machine control device 40A according to the second embodiment will be described.

  FIG. 7 shows the energization patterns # 1, # 2 ', # 3, # 4', # 5, # 6 ', # 7, # 8' of the two-phase rotating electrical machine control device 40A in the second embodiment (hereinafter, referred to as "8"). "# 1 to # 8 '"). 7A to 7H show the flow of current flowing through the A-phase coil 30a and the B-phase coil 30b in each of the conduction patterns # 1 to # 8 '. Note that the switching elements 211 to 216 indicated by broken lines indicate an off state, and the switching elements 211 to 216 indicated by solid lines indicate an on state. Arrows indicate the direction of current flow in the A-phase coil 30a and the B-phase coil 30b. The energization patterns # 1 to # 8 'are patterns that can drive the two-phase rotating electric machine 30. Note that the two-phase rotating electrical machine control device 40A repeats switching of the energization patterns in the order of the energization patterns # 1, # 2 ', # 3, # 4', # 5, # 6 ', # 7, and # 8'. Then, the two-phase rotating electric machine 30 is rotationally driven. When starting the two-phase rotating electric machine 30, the two-phase rotating electric machine control device 40A turns on the switching elements 211 to 216 by using an arbitrary conduction pattern among the conduction patterns of the conduction patterns # 1 to # 8 '. And off may be controlled. That is, the two-phase rotating electrical machine control device 40 </ b> A of the second embodiment is characterized in the order of switching the energizing patterns, and is not particularly limited to the energizing pattern when the two-phase rotating electrical machine 30 is started. Note that FIG. 7A is the same as FIG. 3A, and a description thereof will be omitted. FIG. 7C is the same as FIG. 3C, and a description thereof will be omitted. FIG. 7E is the same as FIG. 3E, and a description thereof will be omitted. FIG. 7G is the same as FIG. 3G, and a description thereof will be omitted.

(Electrification pattern # 2 ')
FIG. 7B is a diagram illustrating an energization pattern # 2 ′ of the two-phase rotating electrical machine control device 40A according to the second embodiment.
In the energization pattern # 2 ', the switching elements 211, 212, and 213 are off, and the switching elements 214, 215, and 216 are on. Therefore, the current Ia flowing through the A-phase coil 30a returns to the A-phase coil 30a through the switching element 214 and the switching element 215. Further, the current Ib flowing through the B-phase coil 30b flows through the switching element 216 and the switching element 215 and returns to the B-phase coil 30b. That is, in the energization pattern # 2 ′, the two-phase rotating electrical machine control device 40A turns on the switching element 215 and turns off the switching element 212 from the energization pattern # 1, thereby turning on the A-phase coil 30a, the switching element 214, and A closed loop of the switching element 215 and a closed loop of the B-phase coil 30b, the switching element 216, and the switching element 215 are formed (see FIG. 7B).

  As described above, by switching the energizing pattern from energizing pattern # 1 to energizing pattern # 3, the direction of the current flowing through the A-phase coil 30a is reversed to excite the A-phase coil 30a. By switching to the pattern # 2 ', the current flowing through the A-phase coil 30a is circulated, and thereafter, the current is switched to the conduction pattern # 3. Thereby, when the A-phase coil 30a is reversely excited, the influence of the self-induction of the A-phase coil 30a can be reduced.

(Electrification pattern # 4 ')
FIG. 7D is a diagram illustrating an energization pattern # 4 ′ of the two-phase rotating electrical machine control device 40A according to the second embodiment.
In the energization pattern # 4 ', the switching elements 212, 214, and 216 are off, and the switching elements 211, 213, and 215 are on. Therefore, the current Ib flowing through the B-phase coil 30b passes through the switching element 213, the switching element 211, and the A-phase coil 30a, and returns to the B-phase coil 30b. That is, in the energization pattern # 4 ', the two-phase rotating electrical machine control device 40A turns off the switching element 216 and turns on the switching elements 213 and 215 from the energization pattern # 3, so that the B-phase coil 30b and the switching element 213, the switching element 211 and the A-phase coil 30a form a closed loop. At this time, the current supplied from the power supply device 10 passes only through a path that passes through the switching element 211, the A-phase coil 30a, the switching element 215, and the ground (see FIG. 7D). Thus, the B-phase coil 30b is not excited, but the A-phase coil 30a is excited. The two-phase rotating electrical machine control device 40A can reduce the influence of self-induction of the B-phase coil 30b by forming a closed circuit that returns the current to be switched with the current flowing in the B-phase coil 30b as the switching target. .

  As described above, by switching the energization pattern from energization pattern # 3 to energization pattern # 5, the direction of the current flowing through B-phase coil 30b is reversed to excite B-phase coil 30b in reverse. By switching to the pattern # 4 ', the current flowing through the B-phase coil 30b is circulated, and thereafter, the current is switched to the conduction pattern # 5. Thus, when the B-phase coil 30b is reverse-excited, the influence of the self-induction of the B-phase coil 30b can be reduced, so that the two-phase rotating electric machine 30 can be efficiently driven.

(Electrification pattern # 6 ')
FIG. 7F is a diagram illustrating an energization pattern # 6 ′ of the two-phase rotating electrical machine control device 40A according to the second embodiment.
In the energization pattern # 6 ′, the switching elements 214, 215, and 216 are in the off state, and the switching elements 211, 212, and 213 are in the on state. Therefore, the current Ia flowing through the A-phase coil 30a passes through the switching element 212 and the switching element 211 and returns to the A-phase coil 30a. Further, the current Ib flowing through the B-phase coil 30b passes through the switching element 212 and the switching element 213 and returns to the B-phase coil 30b. That is, in the energization pattern # 6 ′, the two-phase rotating electrical machine control device 40A turns off the switching element 215 and turns on the switching element 212 from the energization pattern # 5, so that the A-phase coil 30a, the switching element 212, A closed loop of the switching element 211 and a closed loop of the B-phase coil 30b, the switching element 212, and the switching element 213 are formed (see FIG. 7F).

  As described above, by switching the energization pattern from energization pattern # 5 to energization pattern # 7, the direction of the current flowing through A-phase coil 30a is reversed to excite A-phase coil 30a in reverse. By switching to the pattern # 6 ', the current flowing through the A-phase coil 30a is circulated, and thereafter, the current is switched to the conduction pattern # 7. Thereby, when the A-phase coil 30a is reversely excited, the influence of the self-induction of the A-phase coil 30a can be reduced.

(Electrification pattern # 8 ')
FIG. 7H is a diagram illustrating an energization pattern # 8 ′ of the two-phase rotating electrical machine control device 40A according to the second embodiment.
In the energization pattern # 8 ', the switching elements 211, 213, and 215 are off, and the switching elements 212, 214, and 216 are on. Therefore, the current Ib flowing through the B-phase coil 30b passes through the A-phase coil 30a, the switching element 214, and the switching element 216, and returns to the B-phase coil 30b. That is, in the energization pattern # 8 ', the two-phase rotating electrical machine control device 40A turns off the switching element 213 and turns on the switching elements 212 and 216 from the energization pattern # 7, so that the B-phase coil 30b and the A-phase A closed loop is formed by the coil 30a, the switching element 214, and the switching element 216. At this time, the current supplied from the power supply device 10 passes only through a path passing through the switching element 212, the A-phase coil 30a, the switching element 214, and the ground (see FIG. 7H). Thus, the B-phase coil 30b is not excited, but only the A-phase coil 30a is excited. Therefore, when the energizing pattern is switched from energizing pattern # 8 'to energizing pattern # 1, the direction of the current flowing through A-phase coil 30a does not change, but the current flowing through B-phase coil 30b reverses. Therefore, the B-phase coil 30b is reversely excited. The two-phase rotating electrical machine control device 40A can reduce the influence of self-induction of the B-phase coil 30b by forming a closed circuit that returns the current to be switched with the current flowing in the B-phase coil 30b as the switching target. .

  As described above, by switching the energizing pattern from energizing pattern # 7 to energizing pattern # 1, the direction of the current flowing through B-phase coil 30b is reversed to excite B-phase coil 30b, but energizing from energizing pattern # 7. By switching to the pattern # 8 ', the current flowing through the B-phase coil 30b is circulated, and thereafter, the current is switched to the conduction pattern # 1. Thus, when the B-phase coil 30b is reverse-excited, the influence of the self-induction of the B-phase coil 30b can be reduced, so that the two-phase rotating electric machine 30 can be efficiently driven.

  The two-phase rotating electrical machine control device 40A according to the present embodiment switches the direction of the current flowing in one of the two coils of the A-phase coil 30a and the B-phase coil 30b when switching the current direction. Although the current flowing through the coil for switching the direction is recirculated, the present invention is not limited to this. For example, the two-phase rotating electrical machine control device 40A includes at least one of a plurality of timings for switching the direction of the current flowing in one of the two coils of the A-phase coil 30a and the B-phase coil 30b. At the timing, the current flowing through the coil for switching the direction of the current is returned. For example, the plurality of timings include the timing of directly switching from the energization patterns # 1 to # 3, the timing of directly switching from # 3 to # 5, the timing of directly switching from # 5 to # 7, and the timing of # 7 to # 1 shown in FIG. The switching timing of the four energization patterns of the direct switching timing is shown. That is, the two-phase rotating electrical machine control device 40A includes at least one energizing pattern among the energizing patterns # 2 ', # 4', # 6 ', and # 8', which are energizing patterns forming the closed circuit. I just need to be.

  As described above, the two-phase rotating electrical machine control device 40A in the second embodiment determines the direction of the exciting current flowing in one of the two coils of the A-phase coil 30a and the B-phase coil 30b. Before the switching, it is possible to execute switching control for switching to a predetermined direction of the exciting current after recirculating the current flowing through the coil whose direction of the exciting current is to be switched. Thereby, when switching the direction of the current flowing through (the coil of) the A phase or the B phase, it is possible to prevent the generation of a through current and reduce the influence of self-induction.

  In the above-described embodiment, the two-phase electric rotating machine control devices 40 and 40A control the two-phase electric rotating machine 30 in a two-phase three-wire system. However, it is possible to control the two-phase rotating electric machine 30 even with a two-phase four-wire system. However, when the two-phase four-wire system is used, it is necessary to increase the number of switching elements used in the inverter circuit, resulting in high cost.

  Further, the two-phase rotating electric machine 30 can reduce the number of sensors for detecting a rotation angle as compared with a three-phase rotating electric machine (for example, a three-phase brushless DC motor). That is, by using the two-phase rotating electric machine 30 as the rotating electric machine, it is possible to provide an inexpensive rotating electric machine control system as compared with the case of using the three-phase rotating electric machine.

  In the above-described embodiment, the A-phase coil 30a and the B-phase coil 30b may be configured as a coil group in which a plurality of coils are connected in parallel and in series, as shown in FIG.

  The two-phase rotating electrical machine control devices 40 and 40A in the above-described embodiment may be realized by a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read and executed by a computer system. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in a computer system. Further, a "computer-readable recording medium" refers to a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short time. Such a program may include a program that holds a program for a certain period of time, such as a volatile memory in a computer system serving as a server or a client in that case. The program may be for realizing a part of the functions described above, or may be a program that can realize the functions described above in combination with a program already recorded in a computer system. It may be realized using a programmable logic device such as an FPGA (Field Programmable Gate Array).

  As described above, the embodiments of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments and includes a design and the like within a range not departing from the gist of the present invention.

  The execution order of each processing such as operation, procedure, step, and stage in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before”, “before”. It should be noted that the output can be realized in any order as long as the output of the previous process is not used in the subsequent process. Even if the operation flow in the claims, the specification, and the drawings is described using “first,” “second,” or the like for convenience, it means that it is essential to perform the operation in this order. Not something.

DESCRIPTION OF SYMBOLS 1 Control system 10 for two-phase rotating electrical machines 10 Power supply device 20 Inverter circuit 30 Two-phase rotating electrical machine 30a A-phase coil 30b B-phase coil 31 Rotor 32 Stator 33 Rotor magnet 34 Teeth 36 Roller part 37 Tip part 38 Slot 39 Armature coil 40 Two-phase rotating electrical machine control devices 211 to 216 Switching elements

Claims (2)

A rotating electric machine including: a rotor having a plurality of magnets disposed on an inner peripheral surface thereof; and a stator disposed inside the rotor and having a first coil and a second coil wound thereon.
An inverter circuit having a first switching element, a second switching element, a third switching element, a fourth switching element, a fifth switching element, and a sixth switching element;
By switching on or off of the first switching element, the second switching element, the third switching element, the fourth switching element, the fifth switching element, and the sixth switching element, the first coil and the A rotating electrical machine control device for rotating the rotor by controlling a current flowing through a second coil;
In the rotating electric machine control system with
The first switching element and the fourth switching element are connected,
The second switching element and the fifth switching element are connected,
The third switching element and the sixth switching element are connected,
One end of the first coil is connected between the first switching element and the fourth switching element,
One end of the second coil is connected between the third switching element and the sixth switching element,
The other end of the first coil and the other end of the second coil are connected between the second switching element and the fifth switching element,
The rotating electric machine control device,
A path through the second switching element, the first coil, the fourth switching element, and a path through the second switching element, the second coil, the sixth switching element, and a power supply device. A first energization control for passing an exciting current of
After the first energization control, the first switching element is turned on, the fourth switching element is turned off, and the first coil, the first switching element, and the second switching element are closed loop. Is formed, and the current flowing through the first coil is recirculated in the closed loop, so that the exciting current flows only through a path passing through the second switching element, the second coil, and the sixth switching element. Energization control,
After the second energization control, the exciting current is passed through a path passing through the first switching element, the first coil, the second coil, and the sixth switching element, so that the first coil is supplied to the first coil. A third energization control for switching a direction of the flowing exciting current;
After the third energization control, a path passing through the first switching element, the first coil, the fifth switching element, and the third switching element, the second coil, and the fifth switching element A fourth energization control for switching a direction of the exciting current flowing through the second coil by passing an exciting current through the path;
After the fourth energization control, the first switching element is turned off, the fourth switching element is turned on, and a closed loop is formed by the first coil, the fourth switching element, and the fifth switching element. Is formed, and the current flowing through the first coil is returned in the closed loop so that the exciting current flows only through a path passing through the third switching element, the second coil, and the fifth switching element. Energization control,
After the fifth energization control, the exciting current is caused to flow through a path passing through the third switching element, the second coil, the first coil, and the fourth switching element, so that the current flows through the first coil. A sixth energization control for switching a direction of the flowing exciting current,
Before switching the direction of the exciting current flowing in one of the first coil and the second coil by switching the energization control in the order of, the coil to which the direction of the exciting current is switched A rotating electric machine control system characterized by switching the direction of a predetermined exciting current after refluxing the current flowing through the rotating electric machine. A first Hall IC and a second Hall IC are arranged in close proximity to the plurality of magnets,
The rotating electric machine control device,
By switching the plurality of switching based on a pulse signal output from the first Hall IC and the second Hall IC, the energization of the first coil and the second coil is controlled. The rotating electric machine control system according to claim 1, wherein

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