Motor system and air conditioner

Abstract

To make it possible to reduce the number of electric wires configuring a harness.SOLUTION: A first end of a second main coil 32 is connected to a first end of a first main coil 22. A first end of a second sub coil 33 is connected to a first end of a first sub coil 23. A harness 40 includes: a pair of first main electric wires 41a, 41b connected to the first end and a second end of the first main coil 22, respectively; a pair of first sub electric wires 42a, 42b connected to the first end and a second end of the first sub coil 23, respectively; a second main electric wire 43 connected to a second end of the second main coil 32; and a second sub electric wire 44 connected to a second end of the second sub coil 33. A controller 50 comprises: a first switching circuit 61 for switching connection / interception between a drive circuit 51 and the first main electric wire 41b and connection / interception between the drive circuit 51 and the second main electric wire 43; and a second switching circuit 62 for switching connection / interception between the drive circuit 51 and the first sub electric wire 42b and connection / interception between the drive circuit 51 and the second sub electric wire 44.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a motor system and an air conditioner. [Background technology]

[0002] There is a motor system that includes a motor device with a stepping motor, a control device with a drive circuit that controls the drive of the stepping motor, and a harness with multiple electric wires that electrically connect the motor device and the drive circuit (see, for example, Patent Document 1). The stepping motor has two coils. The harness has four electric wires that electrically connect both ends of each coil to the drive circuit. The drive circuit outputs drive pulses to each coil via the electric wires, thereby driving the stepping motor to rotate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-186289 Summary of the Invention [Problem to be solved by the invention]

[0004] In such a motor system, four electric wires are required for each stepping motor. Therefore, if there are two stepping motors, a total of eight electric wires are required. The more stepping motors there are, the more electric wires there are. As a result, there is a risk of inconvenience, such as an increase in the weight of the harness. [Means for solving the problem]

[0005] Various aspects of a motor system and an air conditioner for solving the above problems will be described. [Aspect 1] a motor device including at least a first motor and a second motor, both of which are stepping motors and are selectively driven; a control device including a drive circuit that controls the drive of the first motor and the second motor; a harness having a plurality of electric wires electrically connecting the motor device and the drive circuit, the first motor includes a first main coil and a first auxiliary coil that are independent of each other; the second motor includes a second main coil and a second auxiliary coil that are independent of each other; a first end of the second main coil electrically connected to a first end of the first main coil; a first end of the second sub-coil electrically connected to a first end of the first sub-coil; The harness is a pair of first main wires connected to first and second ends of the first main coil, respectively; a pair of first secondary wires connected to a first end and a second end of the first secondary coil, respectively; a second main wire connected to a second end of the second main coil; a second secondary wire connected to a second end of the second secondary coil, one of the first main electric wires and one of the first secondary electric wires are electrically connected to the drive circuit, The control device a first switch circuit configured to be able to switch between connection and disconnection between the drive circuit and the other of the first main electric wires and connection and disconnection between the drive circuit and the second main electric wire; a second switch circuit configured to be able to switch between connection and disconnection between the drive circuit and the other of the first secondary electric wires and connection and disconnection between the drive circuit and the second secondary electric wires, Motor system.

[0006] According to this configuration, by switching the first switch circuit, the drive circuit and the other end of the first main electric wire are connected, and by switching the second switch circuit, the drive circuit and the other end of the first secondary electric wire are connected, thereby enabling current to flow through the first main coil and the first secondary coil, thereby driving the first motor through the drive circuit.

[0007] On the other hand, by switching the first switch circuit to connect the drive circuit to the second main electric wire and by switching the second switch circuit to connect the drive circuit to the second secondary electric wire, it becomes possible to energize the second main coil and the second secondary coil, thereby driving the second motor through the drive circuit.

[0008] Furthermore, with the above configuration, the harness does not include the electric wire that would be connected to the first end of the second main coil and the electric wire that would be connected to the first end of the second sub-coil in a conventional motor system.

[0009] In this way, with the above configuration, by performing switching control of the first switch circuit and switching control of the second switch circuit, it is possible to selectively drive the first motor and the second motor.

[0010] Therefore, the number of wires constituting the harness can be reduced. [Aspect 2] The motor system according to aspect 1; a first fin that is rotationally driven about a first axis by the first motor to change the blowing direction of the conditioned air; and a second fin that is rotationally driven by the second motor about a second axis that intersects with the first axis to change the blowing direction of the conditioned air. Air conditioner.

[0011] Some air conditioners are equipped with a first fin that is rotatable around a first axis and changes the blowing direction of the conditioned air, and a second fin that is rotatable around a second axis that intersects the first axis and changes the blowing direction of the conditioned air.

[0012] In such an air conditioner, when the first fins are driven to rotate, the second fins remain stationary and are not driven to rotate. Conversely, when the second fins are driven to rotate, the first fins remain stationary and are not driven to rotate. In other words, the first motor that drives the first fins to rotate and the second motor that drives the second fins to rotate are driven alternatively.

[0013] In particular, in an air conditioner mounted on a moving body such as a vehicle, the motor device and the control device are spaced apart, and therefore the length of the harness often becomes 1 m or more. In this regard, according to the above, the number of harnesses constituting the air conditioner can be reduced, and therefore the weight of the harnesses can be effectively reduced. [Effects of the Invention]

[0014] According to the present invention, the number of wires constituting the harness can be reduced. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a front view of an air outlet in the first embodiment of the air conditioner. [Figure 2] FIG. 2 is a circuit diagram of a motor system that constitutes the air conditioner of the first embodiment. [Figure 3] FIG. 3 is a circuit diagram of a motor system that constitutes the air conditioner of the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment A first embodiment of a motor system and an air conditioner will be described below with reference to the drawings.

[0017] <Air conditioner 90> As shown in FIG. 1, an air conditioner 90 is mounted on a vehicle such as an automobile, and includes a bezel 93 having an outlet 94 that blows conditioned air into the vehicle interior.

[0018] The air conditioner 90 includes first fins 91 and second fins 92 that change the blowing direction of conditioned air. The first fin 91 is a horizontal fin and is configured to be rotatable about a first axis that extends horizontally.

[0019] The second fin 92 is a vertical fin and is configured to be rotatable about a second axis extending in the vertical direction. The first axis is perpendicular to the second axis. In this embodiment, the plurality of first fins 91 are arranged at intervals in the vertical direction, and the plurality of second fins 92 are arranged at intervals in the horizontal direction.

[0020] The air conditioner 90 includes a motor system 10 including a first motor 20 (M1) that drives the first fins 91 to rotate and a second motor 30 (M2) that drives the second fins 92 to rotate. As shown in FIG. 2, the motor system 10 includes a motor device 11, a control device 50, and a harness 40.

[0021] <Motor device 11> As shown in FIG. 2, the motor device 11 includes a first motor 20 and a second motor 30, both of which are stepping motors and are selectively driven.

[0022] The first motor 20 includes a first rotor 21, and a first main coil 22 and a first sub-coil 23 that are arranged around the first rotor 21 and are independent of each other. The second motor 30 includes a second rotor 31, and a second main coil 32 and a second auxiliary coil 33 that are arranged around the second rotor 31 and are independent of each other.

[0023] A first end of the second main coil 32 is electrically connected to a first end of the first main coil 22 (contact point S1). A first end of the second sub-coil 33 is electrically connected to a first end of the first sub-coil 23 (contact point S2).

[0024] <Harness 40> As shown in FIG. 2, the harness 40 has a plurality of electric wires that electrically connect the motor device 11 and the drive circuit 51.

[0025] The harness 40 includes a pair of first main electric wires 41a and 41b, a pair of first secondary electric wires 42a and 42b, a second main electric wire 43, and a second secondary electric wire 44. The pair of first main electric wires 41a and 41b are connected to a first end and a second end of the first main coil 22, respectively.

[0026] The pair of first secondary wires 42a and 42b are connected to the first and second ends of the first secondary coil 23, respectively. The second main electric wire 43 is connected to a second end of the second main coil 32 .

[0027] The second secondary wire 44 is connected to the second end of the second secondary coil 33 . A first connector 48 and a second connector 49 are attached to one end and the other end of the pair of first main electric wires 41a, 41b, the pair of first secondary electric wires 42a, 42b, the second main electric wire 43, and the second secondary electric wire 44.

[0028] The first connector 48 is configured to be detachable from the motor device 11. The second connector 49 is configured to be detachable from the control device 50. <Control device 50> As shown in FIG. 2, the control device 50 includes a drive circuit 51 that controls the driving of the first motor 20 and the second motor 30.

[0029] The first main electric wire 41a and the first secondary electric wire 42a are electrically connected to the drive circuit 51. The first main electric wire 41a and the first secondary electric wire 42a are connected to the drive circuit 51 via connection lines 52 and 53, respectively.

[0030] The control device 50 includes a first switch circuit 61 and a second switch circuit 62. The first switch circuit 61 is configured to be able to switch between connecting and disconnecting the drive circuit 51 and the first main electric wire 41b and connecting and disconnecting the drive circuit 51 and the second main electric wire 43. The drive circuit 51 is connected to the first switch circuit 61 via a connection line 54. The first switch circuit 61 is connected to the first main electric wire 41b and the second main electric wire 43 via connection lines 55 and 56, respectively.

[0031] The second switch circuit 62 is configured to be able to switch between connection and disconnection between the drive circuit 51 and the first secondary wire 42b and connection and disconnection between the drive circuit 51 and the second secondary wire 44. The drive circuit 51 is connected to the second switch circuit 62 via a connection line 57. The second switch circuit 62 is connected to the first secondary wire 42b and the second secondary wire 44 via connection lines 58 and 59, respectively.

[0032] For example, when an operating unit (not shown) provided in the vehicle interior is operated, an operating signal for rotationally driving the first fin 91 or an operating signal for rotationally driving the second fin 92 is input to the control device 50. In response to this, the control device 50 controls the first switch circuit 61, the second switch circuit 62, and the drive circuit 51 as follows.

[0033] That is, when an operation signal for rotationally driving the first fin 91 is input, the control device 50 switches the first switch circuit 61 and the second switch circuit 62 as shown by the solid lines in Fig. 2. This connects the drive circuit 51 to the first main electric wire 41b and also connects the drive circuit 51 to the first secondary electric wire 42b. Furthermore, the control device 50 controls the drive circuit 51 to output drive pulses to the first main coil 22 and the first secondary coil 23 of the first motor 20.

[0034] When an operation signal for rotationally driving the second fin 92 is input, the control device 50 switches the first switch circuit 61 and the second switch circuit 62 as shown by the two-dot chain line in Fig. 2. This connects the drive circuit 51 to the second main electric wire 43 and also connects the drive circuit 51 to the second secondary electric wire 44. Furthermore, the control device 50 controls the drive circuit 51 to output drive pulses to the second main coil 32 and second secondary coil 33 of the second motor 30.

[0035] <Operation of this embodiment> By switching the switch circuits 61, 62, the drive circuit 51 is connected to the first main electric wire 41b and the drive circuit 51 is connected to the first secondary electric wire 42b, thereby allowing current to flow through the first main coil 22 and the first secondary coil 23. As a result, the first motor 20 is driven by the drive circuit 51.

[0036] By switching the switch circuits 61, 62, the drive circuit 51 and the second main electric wire 43 are connected, and the drive circuit 51 and the second secondary electric wire 44 are connected, thereby enabling current to flow through the second main coil 32 and the second secondary coil 33. As a result, the second motor 30 is driven through the drive circuit 51.

[0037] Furthermore, according to this embodiment, the harness 40 does not include the electric wire that would be connected to the first end of the second main coil 32 and the electric wire that would be connected to the first end of the second sub-coil 33 in a conventional motor system.

[0038] In this way, by controlling the switching of the switch circuits 61 and 62, the first motor 20 and the second motor 30 can be selectively driven. <Effects of this embodiment> (1) Because of the above-described effects, the number of wires constituting the harness 40 can be reduced.

[0039] (2) In the air conditioner 90, when the first fins 91 are rotationally driven, the second fins 92 remain stationary and are not rotationally driven. Also, when the second fins 92 are rotationally driven, the first fins 91 remain stationary and are not rotationally driven. In other words, the first motor 20 that rotationally drives the first fins 91 and the second motor 30 that rotationally drives the second fins 92 are selectively driven.

[0040] Furthermore, in an air conditioner 90 mounted on a vehicle, since there are many motor devices 11 and control devices 50, the length of the harness 40 is often 1 m or more. In this regard, according to this embodiment, the number of harnesses 40 constituting the air conditioner 90 can be reduced, and therefore the weight of the harnesses 40 can be effectively reduced.

[0041] Second Embodiment The second embodiment will be described below with reference to the drawings. The second embodiment differs from the first embodiment in that the air conditioner 90 includes shut fins (not shown) configured to be able to block the flow path of the conditioned air, and a third motor 70 that drives the shut fins to open and close. The shut fins are arranged upstream of the first fins 91 and the second fins 92 in the flow direction of the conditioned air.

[0042] The second embodiment will be described below, focusing on the differences from the first embodiment. Note that the same or corresponding configurations as those in the first embodiment will be denoted by the same reference numerals as those in the first embodiment, and redundant description will be omitted.

[0043] <Motor device 11> As shown in FIG. 3, the motor device 11 is a stepping motor, and includes a first motor 20, a second motor 30, and a third motor 70 that are selectively driven.

[0044] The third motor 70 includes a third rotor 71, and a third main coil 72 and a third sub-coil 73 that are arranged around the third rotor 71 and are independent of each other. A first end of the third main coil 72 is electrically connected to a first end of the first main coil 22 (contact point S3).

[0045] A first end of the third sub-coil 73 is electrically connected to a first end of the first sub-coil 23 (contact point S4). <Harness 40> As shown in FIG. 3, the harness 40 includes a third main electric wire 45 connected to the second end of the third main coil 72 and a third secondary electric wire 46 connected to the second end of the third secondary coil 73.

[0046] A first connector 48 and a second connector 49 are attached to one end and the other end of the pair of first main electric wires 41a, 41b, the pair of first secondary electric wires 42a, 42b, the second main electric wire 43, the second secondary electric wire 44, the third main electric wire 45, and the third secondary electric wire 46.

[0047] <Control device 50> 3, the first switch circuit 61 is configured to be able to switch between connection and disconnection between the drive circuit 51 and the first main electric wire 41b, connection and disconnection between the drive circuit 51 and the second main electric wire 43, and connection and disconnection between the drive circuit 51 and the third main electric wire 45. The first switch circuit 61 is connected to the first main electric wire 41b, the second main electric wire 43, and the third main electric wire 45 via connection lines 55, 56, and 81, respectively.

[0048] The second switch circuit 62 is configured to be able to switch between connection and disconnection between the drive circuit 51 and the first secondary wire 42b, connection and disconnection between the drive circuit 51 and the second secondary wire 44, and connection and disconnection between the drive circuit 51 and the third secondary wire 46. The second switch circuit 62 is connected to the first secondary wire 42b, the second secondary wire 44, and the third secondary wire 46 via connection lines 58, 59, and 82, respectively.

[0049] For example, when an operating unit (not shown) provided in the vehicle interior is operated, an operation signal for rotating the shutoff fins is input to the control device 50. In response to this, the control device 50 controls the first switch circuit 61, the second switch circuit 62, and the drive circuit 51 as follows.

[0050] That is, when an operation signal for rotationally driving the shut fins is input, the control device 50 switches the first switch circuit 61 and the second switch circuit 62 as shown by the two-dot chain line in Fig. 3. This connects the drive circuit 51 to the third main electric wire 45 and also connects the drive circuit 51 to the third secondary electric wire 46. Furthermore, the control device 50 controls the drive circuit 51 to output drive pulses to the third main coil 72 and the third secondary coil 73 of the third motor 70.

[0051] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0052] The first axis, which is the center of rotation of the first fin 91, and the second axis, which is the center of rotation of the second fin 92, only need to intersect, and do not necessarily have to be perpendicular to each other. The motor system according to the present invention is not limited to the motor system 10 of the air conditioner 90, but can also be applied to other devices. [Explanation of symbols]

[0053] 10...Motor system 11...Motor device 20...First motor 21...First rotor 22...First main coil 23...First sub-coil 30...Second motor 31...Second rotor 32...Second main coil 33...Second sub-coil 40...Harness 41a, 41b…1st main wire 42a, 42b…1st sub wire 43…Second main wire 44…Second sub-wire 45...Third main wire 46...Third sub-wire 48...First connector 49...Second connector 50...Control device 51...Drive circuit 52, 53, 54, 55, 56, 57, 58, 59...connecting wires 61...First switch circuit 62...Second switch circuit 70...Third motor 71...Third rotor 72...Third main coil 73...Third sub-coil 81, 82...connecting lines 90...Air conditioner 91...First fin 92...Second fin 93...Bezel 94...Air outlet S1, S2, S3, S4…Contact

Claims

1. a motor device including at least a first motor and a second motor, both of which are stepping motors and are selectively driven; a control device including a drive circuit that controls the driving of the first motor and the second motor; a harness having a plurality of electric wires electrically connecting the motor device and the drive circuit, the first motor includes a first main coil and a first auxiliary coil that are independent of each other; the second motor includes a second main coil and a second auxiliary coil that are independent of each other; a first end of the second main coil electrically connected to a first end of the first main coil; a first end of the second sub-coil electrically connected to a first end of the first sub-coil; The harness is a pair of first main wires connected to first and second ends of the first main coil, respectively; a pair of first secondary wires connected to a first end and a second end of the first secondary coil, respectively; a second main wire connected to a second end of the second main coil; a second secondary wire connected to a second end of the second secondary coil, one of the first main electric wires and one of the first secondary electric wires are electrically connected to the drive circuit, The control device a first switch circuit configured to switch between connection and disconnection of the drive circuit and the other of the first main electric wires and between connection and disconnection of the drive circuit and the second main electric wire; a second switch circuit configured to be able to switch between connection and disconnection between the drive circuit and the other of the first secondary electric wires and between connection and disconnection between the drive circuit and the second secondary electric wires, Motor system.

2. The motor system according to claim 1; a first fin that is rotationally driven about a first axis by the first motor to change the blowing direction of the conditioned air; a second fin that is rotationally driven by the second motor about a second axis that intersects with the first axis to change the blowing direction of the conditioned air, Air conditioner.

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