JP2019103309A - Motor device - Google Patents

Abstract

To provide a motor device capable of suppressing variations of an input current flowing through two driving circuits.SOLUTION: A motor device 1 comprises: a motor 50; a driving control device 1a; and a position detector 40 outputting a position detection signal. The motor 50 comprises: a plurality of magnetic poles 51a to 51d; and a plurality of coils 80 wound around teeth 70. In each of the plurality of coils 80, a first system coil 80a and a second system coil 80b are alternately arranged in a circumference direction. The motor drive controller 1a includes a first driving circuit 10 and a second driving circuit 10b to each of which the position detection signal is input, and the first driving circuit 10 is conducted to the first system coil 80a on the basis of the position detection signal, and the second driving circuit 10b is conducted to the second system coil 80b on the basis of the position detection signal so that a current of a phase inverse to the phase of the current flowing through the first system coil 80a flows.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a motor device, and more particularly to a motor device having two drive circuits.

  Motor devices using single-phase motors such as 4-pole 4-slot motors and 8-pole 8-slot motors are widely used. The coil structure of such a single-phase motor is one in which CW (clockwise direction) and CCW (counterclockwise direction) are alternately inverted every slot (see, for example, Patent Document 1).

JP 2007-129830 A

  By the way, in the coil structure as described above, when the lead wire from the coil is drawn out in the same direction, etc., the number of turns differs between the slot wound in the CW direction and the slot wound in the CCW direction. In addition, there is a problem that the resistance values of the coils become uneven due to differences in the lengths of the coil wires. In the case where two systems of coils whose resistance values are different from each other are separately driven by two drive circuits, there is a problem that variations occur in the peak value of the input current, and the load applied to each drive circuit is uneven. Such a problem occurs regardless of the number of turns in one slot, but is more pronounced particularly when the number of turns is relatively small.

  The present invention has been made to solve such problems, and it is an object of the present invention to provide a motor device capable of suppressing variations in input current flowing through two drive circuits.

  In order to achieve the above object, according to an aspect of the present invention, a motor device includes a motor, a motor drive control device that controls driving of the motor, and a position detector that outputs a position detection signal according to the position of a rotor of the motor. A motor comprising a plurality of magnetic poles and a plurality of coils wound in the same direction for each of the plurality of teeth, each of the plurality of coils being in series with each other The combination of the teeth and the coil wound around the teeth, which are included in any of the connected first series coils and the second series coils connected in series with each other, is a combination of the first series coils and the first series coils. The motor drive control device has a first drive circuit and a second drive circuit to which position detection signals are input, and the coils of the second system are alternately arranged in the circumferential direction. 1 The drive circuit energizes the coil of the first system based on the position detection signal, and the second drive circuit operates the phase opposite to the phase of the current flowing in the coil of the first system based on the position detection signal. The coils of the second system are energized such that current flows.

  Preferably, the position detection signal is a signal having a polarity, and the second drive circuit processes the position detection signal as a signal having a polarity opposite to that processed by the first drive circuit. Do.

  Preferably, each of the first drive circuit and the second drive circuit controls an operation of the inverter circuit based on an inverter circuit having a first output terminal and a second output terminal, and a position detection signal. The inverter circuit of the first drive circuit is energized with the coil of the first system based on the control of the control circuit unit of the first drive circuit, and the inverter circuit of the second drive circuit is The coil of the second system is energized based on the control of the control circuit unit of the second drive circuit, and the first output terminal and the second output terminal of the first drive circuit are connected to the coil of the first system. And the polarity to which the first output terminal and the second output terminal in the second drive circuit and the coil of the second system are connected are the same, and the position detection signal is either positive or negative. Signal output by one signal line, the first The positive and negative of the signal line of the position detection signal connected to the control circuit unit of the dynamic circuit are opposite to the positive and negative of the signal line of the position detection signal connected to the control circuit unit of the second drive circuit. .

  Preferably, each of the first drive circuit and the second drive circuit controls an operation of the inverter circuit based on an inverter circuit having a first output terminal and a second output terminal, and a position detection signal. The inverter circuit of the first drive circuit is energized with the coil of the first system based on the control of the control circuit unit of the first drive circuit, and the inverter circuit of the second drive circuit is The coil of the second system is energized based on the control of the control circuit unit of the second drive circuit, and the first output terminal and the second output terminal of the first drive circuit are connected to the coil of the first system. And the polarity to which the first output terminal and the second output terminal in the second drive circuit and the coil of the second system are connected are the same, and the position detection signal is either positive or negative. Signal output by one signal line, the first The positive and negative of the signal line of the position detection signal connected to the control circuit unit of the dynamic circuit and the positive and negative of the signal line of the position detection signal connected to the control circuit unit of the second drive circuit are the same. And one of the control circuit unit of the first drive circuit and the control circuit unit of the second drive circuit inverts the positive / negative of the input position detection signal and supplies electricity based on the inverted position detection signal. Do.

  Preferably, each of the first drive circuit and the second drive circuit controls an operation of the inverter circuit based on an inverter circuit having a first output terminal and a second output terminal, and a position detection signal. The inverter circuit of the first drive circuit is energized with the coil of the first system based on the control of the control circuit unit of the first drive circuit, and the inverter circuit of the second drive circuit is The coil of the second system is energized based on the control of the control circuit unit of the second drive circuit, and the first output terminal and the second output terminal of the first drive circuit are connected to the coil of the first system. And the polarity to which the first output terminal and the second output terminal in the second drive circuit and the coil of the second system are connected are opposite to each other, and the position detection signal is positive or negative 2 Signal output by one signal line, the first The positive and negative of the signal line of the position detection signal connected to the control circuit unit of the dynamic circuit and the positive and negative of the signal line of the position detection signal connected to the control circuit unit of the second drive circuit are the same. .

  According to another aspect of the present invention, a motor device includes a motor, a motor drive control device that controls driving of the motor, and a position detector that outputs a position detection signal according to the position of the rotor of the motor. The motor includes a plurality of magnetic poles and a plurality of coils wound around each of the plurality of teeth, each of the plurality of coils being mutually connected in series with the coils of the first system and the plurality of coils. The winding direction for each tooth of the coil of the first system and the winding direction for each tooth of the coil of the second system included in any of the coils of the second system connected in series are mutually different. In the reverse direction, the combination of the teeth and the coils wound around the teeth is circumferentially arranged so that the coils of the first system and the coils of the second system are alternately arranged. The drive control device has a first drive circuit and a second drive circuit to which a position detection signal is input, and the first drive circuit energizes the coil of the first system based on the position detection signal. The second drive circuit energizes the coil of the second system so that the current having the same phase as the phase of the current flowing through the coil of the first system flows based on the position detection signal.

  According to these inventions, it is possible to provide a motor device capable of suppressing variations in input current flowing to two drive circuits.

It is a figure which shows typically the structure of the motor apparatus in the 1st Embodiment of this invention. It is a figure explaining the composition of the stator of a motor. It is a figure explaining an example of the stator of the single phase motor of 4 pole slot. It is a figure explaining the input current which flows through a drive circuit. It is a figure which shows typically the structure of the motor apparatus which concerns on the modification of 1st Embodiment. It is a figure explaining the connection relation of the coil concerning this modification. It is a figure which shows typically the structure of the motor apparatus which concerns on 2nd Embodiment. It is a figure explaining the connection relation of the coil concerning a 2nd embodiment.

  Hereinafter, a motor device according to an embodiment of the present invention will be described.

  In the following description, the winding direction of the coil with respect to the teeth means the direction in which the coil is wound around the teeth as viewed from the direction from the tip end of the teeth toward the rotation axis of the motor. That is, the coil is wound around the teeth either clockwise (CW) or counterclockwise (CCW) with respect to the teeth.

  First Embodiment

  FIG. 1 is a view schematically showing a configuration of a motor device 1 according to a first embodiment of the present invention.

  As shown in FIG. 1, the motor device 1 includes a motor 50, a motor drive control device 1 a that controls the drive of the motor 50, and a position detector 40. A power supply voltage Vdc is supplied to the motor device 1 from the outside. Further, an FG signal corresponding to the rotation of the motor 50 is output from the motor device 1 to the outside. A speed command is input to the motor device 1 from the outside. The motor device 1 drives the motor 50 in accordance with the input speed command.

  The motor 50 is provided with a plurality of magnetic poles 51a, 51b, 51c, 51d, and a plurality of coils 80 (a generic name of each coil) wound around a plurality of teeth 70 (a generic name of each tooth). ing. The plurality of teeth 70 and the plurality of coils 80 constitute a stator 60. In the present embodiment, four magnetic poles 51a, 51b, 51c, and 51d, and a combination of four teeth 70 and a coil 80 wound around the teeth 70 are provided. That is, the number of combinations of the teeth 70 and the coils 80 wound around the teeth 70 is the same as the number of the plurality of magnetic poles 51a, 51b, 51c, 51d.

  In FIG. 1, the arrow indicates the winding direction of the coil 80.

  As described later, each of the plurality of coils 80 is a first system coil 80a (shown in FIG. 2) connected in series with each other, and a second system coil 80b (shown in FIG. 2) connected in series with each other And is included in either.

  In the present embodiment, the motor drive control device 1a has a first drive circuit 10 and a second drive circuit 10b. Each of the first drive circuit 10 and the second drive circuit 10 b includes inverter circuits 15 and 15 b and control circuit units 12 and 12 b. Further, each of the first drive circuit 10 and the second drive circuit 10 b has fuses 19 and 19 b.

  Hereinafter, the control circuit unit 12 of the first drive circuit 10 may be referred to as the first control circuit unit 12, and the control circuit unit 12b of the second drive circuit 10b may be referred to as the second control circuit unit 12b. The inverter circuit 15 of the first drive circuit 10 may be referred to as the first inverter circuit 15, and the inverter circuit 15b of the second drive circuit 10b may be referred to as the second inverter circuit 15b.

  The power supply voltage Vdc and the speed command input to the motor device 1 are input to each of the first drive circuit 10 and the second drive circuit 10b. In the present embodiment, the FG signal is output from the first drive circuit 10 and is output to the outside of the motor device 1.

  One position detector 40 is connected to the first drive circuit 10 and the second drive circuit 10 b. The first drive circuit 10 and the second drive circuit 10 b share one position detector 40.

  The position detector 40 outputs a position detection signal in accordance with the position of the rotor of the motor 50. In the present embodiment, the position detection signal is a signal having a polarity. The position detection signal is a signal output by two positive and negative signal lines.

  Specifically, in the present embodiment, the position detector 40 is a Hall element. Each position detector 40 outputs a Hall signal, which is a signal having positive and negative polarities, as a position detection signal. The hall signal is output by two positive and negative signal lines.

  As described later, the first drive circuit 10 energizes the coil 80a of the first system based on the position detection signal, and the second drive circuit 10b detects the coil of the first system based on the position detection signal. The coil 80b of the second system is energized such that a current having a phase opposite to the phase of the current flowing to 80a flows. The second drive circuit 10b conducts electricity by processing the position detection signal as a signal of the opposite polarity to the polarity processed by the first drive circuit 10.

  In the present embodiment, the first drive circuit 10 and the second drive circuit 10 b have the same circuit configuration as each other except that the output of the FG signal is performed from the first drive circuit 10 and the points to be described later. Have. Therefore, except for differences, the configuration of the first drive circuit 10 will be described below, and the description of the second drive circuit 10b will also be used.

  In the first drive circuit 10, the power supply voltage Vdc is input to the first control circuit unit 12 and the first inverter circuit 15 via the fuse 19.

  The first control circuit unit 12 is, for example, a general-purpose IC for driving a motor. The speed command and the position detection signal output from the position detector 40 are input to the first control circuit unit 12. The first control circuit unit 12 outputs an output signal for operating the first inverter circuit 15 based on the position detection signal, and controls the operation of the first inverter circuit 15. For example, the first control circuit unit 12 detects the rotational speed of the motor 50 based on the position detection signal, and the first rotational speed of the motor 50 corresponds to the input speed command. The on / off operation of the switching element included in the inverter circuit 15 is controlled.

  The first inverter circuit 15 energizes the coil 80 provided in the motor 50 based on the output signal output from the first control circuit unit 12. The first inverter circuit 15 has, for example, two pairs of series circuits of two switch elements provided at both ends of the power supply voltage Vdc. In each pair of two switch elements, the connection point between the switch elements is an output for energizing the energization system (the coil 80a of the first system or the coil 80b of the second system) of the coil 80 including the plurality of coils 80 Terminals 16 and 17 are provided. When the first control circuit unit 12 outputs an output signal corresponding to each switch element of the inverter circuit 15, the switch element corresponding to each output signal is turned on and off, and the output terminals 16 and 17 are output. The energization system of the connected coil 80 is energized.

  Hereinafter, in the first inverter circuit 15, a connection point of one pair of switch elements may be referred to as a first output terminal 16, and a connection point of the other pair of switch elements may be referred to as a second output terminal 17. . In the second inverter circuit 15b, a connection point of one pair of switch elements may be referred to as a first output terminal 16b, and a connection point of the other pair of switch elements may be referred to as a second output terminal 17b.

  In the first drive circuit 10, the first control circuit unit 12 outputs an FG signal according to the rotation of the motor 50. In this regard, in the second drive circuit 10b, the second control circuit unit 12b does not output the FG signal. The FG signal may be output from the second control circuit unit 12 b and may not be output from the first control circuit unit 12.

  Further, in the present embodiment, the position detection signal is input to the first drive circuit 10 and the second drive circuit 10b, and the positive / negative polarity of the input position detection signal is the first drive. The circuit 10 and the second drive circuit 10b are reversed (in the figures from FIG. 1, the plus and minus signs for the signal lines extending from the position detector 40 indicate the positive and negative polarities of the signal lines) . That is, the second drive circuit 10 b performs energization by processing the position detection signal as a signal of the opposite polarity to the polarity processed by the first drive circuit 10. Specifically, whether the signal line of the position detection signal connected to the first control circuit unit 12 is positive or negative and whether the signal line of the position detection signal connected to the second control circuit unit 12b is positive or negative It is opposite to each other.

  FIG. 2 is a view for explaining the configuration of the stator 60 of the motor 50. As shown in FIG.

  In FIG. 2, the arrow indicates the winding direction of the coil 80. In addition, in FIG. 2, each coil 80 is shown typically.

  Each of the plurality of coils 80 is included in either the first system coil 80a connected in series with each other or the second system coil 80b connected in series with each other. The combination of the teeth 70 and the coils 80 wound around the teeth 70 is circumferentially arranged so that the coils 80 a of the first system and the coils 80 b of the second system are alternately arranged.

  In the present embodiment, each of the plurality of coils 80 is wound in the same direction around each of the plurality of teeth 70.

  Specifically, as shown in FIG. 2, in the present embodiment, a total of four coils 81, 82, 83, 84 are wound around four teeth 71, 72, 73, 74, respectively. . The winding direction of each coil 81, 82, 83, 84 is, for example, a CW direction. The direction may be CCW.

  The teeth 70 are connected to each other at a portion near the rotation axis to constitute an integral stator yoke. Each tooth 70 radially extends radially outward from a portion close to the rotation axis, and a radial tip end of the tooth 70 is configured to be close to the magnetic poles 51a, 51b, 51c, 51d of the rotor. The teeth 70 are arranged at equal intervals in the circumferential direction, that is, at intervals of 90 degrees around the rotation axis.

  The coil 80a of the first system and the coil 80b of the second system are provided with the same number. That is, the number of coils 80a of the first system and the number of coils 80b of the second system are two each.

  The coil 80a of the first system includes two coils 82 and 84 facing each other across the rotation axis. The coils 82 and 84 are wound around the teeth 72 and 74 in series so that one starts winding and the other ends.

    The coil 80b of the second system includes two coils 81 and 83 facing each other with the rotation axis interposed therebetween. The coils 81 and 83 are wound around the teeth 71 and 73 in series so that one starts winding and the other ends.

  The coils 80 are circumferentially arranged such that the coils 80a of the first system and the coils 80b of the second system are alternately arranged as follows. That is, from the coil 82 of the first system, the coil 83 of the second system, the coil 84 of the first system, and the coil 81 of the second system are arranged counterclockwise in FIG.

  The first inverter circuit 15 energizes the coil 80 a of the first system based on the control of the first control circuit unit 12. The second inverter circuit 15b energizes the coil 80b of the second system based on the control of the second control circuit unit 12b.

  The first inverter circuit 15 is connected to the coil 80 a of the first system. The first output terminal 16 is connected to the coil 82, and the second output terminal 17 is connected to the coil 84. The second inverter circuit 15b is connected to the coil 80b of the second system. The first output terminal 16 b is connected to the coil 83, and the second output terminal 17 b is connected to the coil 81.

  That is, the first drive circuit 10 and the second drive circuit 10b have the same circuit configuration except for the above-described point. The first output terminal 16 and the second output terminal 16 in the first drive circuit 10 are different. The polarity in which the output terminal 17 and the coil 80a of the first system are connected (which means the polarity considering the winding direction of the coil 80), the first output terminal 16b and the second output in the second drive circuit 10b It can be said that the terminal 17b and the coil 80b of the second system are connected to the same polarity (meaning the polarity considering the winding direction of the coil 80). Such a connection relationship expresses that when the switch elements are operated in the same phase for each of the inverter circuits 15 and 15b, the teeth wound with the coils 80 are excited to the same polarity. It can also be done.

  The first control circuit unit 12 switches the direction of the current flowing through the coil 80a of the first system at a timing according to the input position detection signal (hall signal), and the second control circuit unit 12b receives the input The direction of the current flowing through the coil 80b of the second system is switched at timing according to the position detection signal (Hall signal).

  Here, as described above, the positive and negative polarities of the position detection signal input to the first drive circuit 10 and the second drive circuit 10 b are opposite to each other in the first drive circuit 10 and the second drive circuit 10 b. It has become. Therefore, the first drive circuit 10 energizes the coil 80a of the first system based on the position detection signal, and the second drive circuit 10b flows to the coil 80a of the first system based on the position detection signal. The coil 80b of the second system is energized such that a current having a phase opposite to that of the current flows. The winding direction of each coil 80 is the same direction, and the direction of the current flowing through the coil 80a of the first system and the coil 80b of the second system is reversed, so that a rotational torque is generated in the motor 50 and the motor 50 Rotate.

  FIG. 3 is a view for explaining an example of a stator 860 of a four-pole four-slot single-phase motor.

  For example, it is assumed that a general 4-pole 4-slot single-phase motor as shown in FIG. 3 is driven using two drive circuits. The winding direction (for example, the CCW direction) of the first series of coils 82 and 84 facing each other among the coil 81, the coil 82, the coil 83, and the coil 84 wound in four slots, and the other second series The winding direction (for example, the CW direction) of the coils 81 and 83 is different. In that case, the number of coil turns may be different between the first system and the second system due to the wiring of the connecting wire and the like. In addition, if the directions in which the wires are drawn out from the respective coils are the same, the lengths of the wires may differ between the first system and the second system.

  As described above, when the wiring length and the number of turns are different between the first system and the second system, the load between the drive circuits supplied to the respective systems is different, and the input current flowing through the drive circuit may vary. is there.

  FIG. 4 is a diagram for explaining the input current flowing through the drive circuit.

  In FIG. 4, the upper part shows an example of the input current of the drive circuit in the comparative example (when driving the above-mentioned general single-phase motor using one drive circuit), and the lower part shows the drive in this embodiment. An example of the input current of the circuits 10 and 10b is shown. In the comparative example, it can be seen that the peak value of the waveform of the input current fluctuates. On the other hand, it is understood that the peak value of the waveform of the input voltage is stable in the present embodiment. This is because the winding direction of each coil 80 is uniform, and the difference between the number of turns of each coil 80 and the length of the coil wire can be reduced between the first system and the second system.

  As described above, in the present embodiment, it is possible to suppress variations in input current flowing through the two drive circuits 10 and 10b.

  Further, in the present embodiment, the plurality of coils 80 of the motor 50 are divided into two energization systems, and each energization system is energized by the two drive circuits 10 and 10b. As the first drive circuit 10 and the second drive circuit 10b, those having the same circuit configuration that performs the same operation based on the position detection signal from the position detector 40 can be used. Therefore, the effect of reducing the manufacturing cost of the motor device 1 can be obtained.

  In the present embodiment, in either one of the first drive circuit 10 and the second drive circuit 10b, even when the fuses 19 and 19b are broken or broken and the drive is stopped, only the other one is used. Thus, the drive of the motor 50 can be continued. Therefore, for example, when external load is applied to the motor 50, even if one of the drive circuits 10 and 10b is stopped, the rotational torque of the motor 50 can be generated, so that it continues to resist external load. be able to. A stronger torque can be generated than when the motor 50 is short braked.

  For example, in the case where the motor device 1 is used as one of a plurality of fan motors used for ventilating the inside of the device, even if one of the drive circuits 10 and 10b is stopped, the pressure difference between the inside and outside of the device is resisted. be able to. Therefore, it is possible to prevent the occurrence of the problem that the motor 50 is reversely rotated due to the pressure difference between the inside and the outside of the device and the ventilation capacity is lowered.

  In the above embodiment, one of the control circuit unit 12 of the first drive circuit 10 and the control circuit unit 12b of the second drive circuit 10b inverts the positive or negative of the input position detection signal. Energization may be performed based on the inverted position detection signal. In this case, the signal line of the position detection signal connected to the control circuit unit 12 of the first drive circuit 10, and the signal of the position detection signal connected to the control circuit unit 12b of the second drive circuit 10b. Both positive and negative of the line can be the same.

  [Description of Modification]

  FIG. 5 is a view schematically showing a configuration of a motor device 101 according to a modification of the first embodiment. FIG. 6 is a diagram for explaining the connection relationship of the coil 80 according to the present modification.

  The motor device 101 according to the present modification is different from the motor device 1 according to the first embodiment in the following points. That is, as shown in FIG. 5, the signal line of the position detection signal connected to the control circuit unit 12 of the first drive circuit 10 is connected to the positive and negative of the signal line and the control circuit unit 12b of the second drive circuit 10b. The positive and negative of the signal line of the position detection signal are the same. Also, the polarity to which the first output terminal 16 and the second output terminal 17 in the first drive circuit 10 and the coil 80a of the first system are connected, and the first output terminal 16b in the second drive circuit 10b. The polarities to which the second output terminal 17b and the coil 80b of the second system are connected are opposite to each other.

  As shown in FIG. 6, in the present modification, of the coils 80 a of the first system, the coil 82 is connected to the first output terminal 16, and the coil 84 is connected to the second output terminal 17. On the other hand, in the coil 80b of the second system, the coil 81 is connected to the first output terminal 16b, and the coil 83 is connected to the second output terminal 17b.

  That is, in the present modification, the first drive circuit 10 and the second drive circuit 10b have the same circuit configuration with respect to energization of the coil 80. The polarity to which the coil 80a is connected (a polarity considering the winding direction of the coil 80) and the polarity to which the second inverter circuit 15b and the coil 80b of the second system are connected (winding direction of the coil 80 It can be said that the terms “polarity” taking account of the above are opposite to each other. Such a connection relationship is such that when the switch elements are operated in opposite phases to each other in the first inverter circuit 15 and the second inverter circuit 15b, the teeth wound with the coils 80 have the same polarity. It can also be expressed as exciting.

  In this modification, the positive and negative of the signal line of the position detection signal input to the two control circuit units 12 and 12b are identical as described above, and the first inverter circuit 15 and the coil 80a of the first system are connected. And the polarity to which the second inverter circuit 15b and the coil 80b of the second system are connected are opposite to each other. Based on the connection relationship between the motor drive control device 101a and the motor 50, the first drive circuit 10 energizes the coil 80a of the first system based on the position detection signal, and the second drive circuit 10b Based on the position detection signal, the coil 80b of the second system is energized such that a current having a phase opposite to the phase of the current flowing through the coil 80a of the first system flows. Also in this modification, since the motor 50 configured in the same manner as the above-described embodiment can be driven, the same effect as the above-described embodiment can be obtained.

  Second Embodiment

  The basic configuration of the motor device in the second embodiment is the same as that in the modification of the first embodiment, and therefore the description thereof will not be repeated. In particular, the configuration of the motor drive control device is the same as that of the modification of the first embodiment. In the second embodiment, the configuration of the motor is different from that in the modification of the first embodiment.

  FIG. 7 is a view schematically showing a configuration of a motor device 201 according to the second embodiment. FIG. 8 is a diagram for explaining the connection relationship of the coil 80 according to the second embodiment.

  As shown in FIG. 7, in the second embodiment, the motor device 201 includes the motor drive control device 101 a described above, and a motor 250 having a stator 260 having a configuration different from that of the motor 50 described above. . That is, in the second embodiment, the signal line of the position detection signal connected to the control circuit unit 12 of the first drive circuit 10 is connected to the positive and negative of the signal line, and to the control circuit unit 12b of the second drive circuit 10b. The positive and negative of the signal line of the position detection signal are the same.

  As shown in FIG. 8, the stator 260 has teeth 70 (tooth 71 to 74) similar to the motor 50 described above, and a coil 80 (coils 81 to 84) is wound around each tooth 70. ing.

  Here, the winding direction of the coil 280a (coils 82 and 84) of the first system with respect to the teeth 72 and 74, and the winding of the coil 280b (coils 81 and 83) of the second system with respect to the teeth 771 and 73 The directions are opposite to each other. For example, the winding direction of the coil 280b of the second system is the CW direction, and the winding direction of the coil 280a of the first system is the CCW direction.

  In the second embodiment, of the coils 280 a of the first system, the coil 82 is connected to the first output terminal 16, and the coil 84 is connected to the second output terminal 17. On the other hand, in the coil 280b of the second system, the coil 83 is connected to the first output terminal 16b, and the coil 81 is connected to the second output terminal 17b. Such a connection relationship is the teeth 72 in which the coil 280a of the first system is wound when the respective switch elements are operated in the same phase with each other in the first inverter circuit 15 and the second inverter circuit 15b. It can also be expressed that the polarity in which 74 is excited and the polarity in which the teeth 71 and 73 around which the coil 280b of the second system is wound are excited are opposite to each other.

  The first drive circuit 10 energizes the coil 280a of the first system based on the position detection signal, and the second drive circuit 10b generates the current of the current flowing through the coil 280a of the first system based on the position detection signal. The coil 280b of the second system is energized such that a current having the same phase as the phase flows. Thus, the motor 250 is rotated.

  In the second embodiment, the length of the connecting wire 85a connecting the coil 82 and the coil 84 in the coil 280a of the first system and the connecting wire connecting the coil 81 and the coil 83 in the coil 280b of the second system The length of 85b can be made substantially equal. Therefore, the difference between the number of turns of each coil 80 and the length of the coil wire can be reduced between the first system and the second system. Therefore, as in the above-described embodiment, it is possible to obtain the effect of being able to suppress the variation in the input current flowing through the two drive circuits 10 and 10b.

  [Others]

  The circuit configuration of the motor device is not limited to the specific example as shown in the above-described embodiment or the modification thereof. The individual configurations in the above-described embodiment and the modifications thereof may be combined appropriately with the partially modified configurations so as to fit the purpose of the present invention. Besides, various circuit configurations configured to meet the object of the present invention can be applied.

  The motor used for the motor apparatus of the present embodiment is not limited to that of the above embodiment. The number of magnetic poles and the number of slots are not limited to the embodiment. The number of magnetic poles and the number of slots may be multiples of four.

  The control circuit unit of each drive circuit unit is not limited to a general purpose IC.

  The number of position detectors is not limited to one. In the case where the number of position detectors is one, it is more preferable because current imbalance caused by the displacement of the mounting position among the plurality of position detectors does not occur.

  It should be understood that the above embodiments are illustrative and non-restrictive in every respect. The scope of the present invention is indicated not by the above description but by claims, and is intended to include all modifications within the meaning and scope equivalent to claims.

  1, 101, 201 motor device, 1a, 101a motor drive control device, 10 first drive circuit, 10b second drive circuit, 12 first control circuit unit, 12b second control circuit unit, 15 first Inverter circuit 15b Second inverter circuit 16, 16b First output terminal 17, 17b Second output terminal 40 Position detector 50, 250 motor, 51a, 51b, 51c, 51d Magnetic pole, 60, 260 Stator, 70, 71, 72, 73, 74 teeth, 80 coils, 80a, 82, 84, 280a first series coil, 80b, 81, 83, 280b second series coil

Claims (6)

A motor device comprising: a motor; a motor drive control device for controlling the drive of the motor; and a position detector for outputting a position detection signal according to a position of a rotor of the motor,
The motor includes a plurality of magnetic poles and a plurality of coils wound in the same direction for each of the plurality of teeth.
Each of the plurality of coils is included in one of a first series of coils connected in series with each other and a second series of coils connected in series with each other,
The combination of the teeth and the coils wound around the teeth is circumferentially arranged so that the coils of the first system and the coils of the second system are alternately arranged,
The motor drive control device has a first drive circuit and a second drive circuit to which the position detection signal is input, respectively.
The first drive circuit energizes the coil of the first system based on the position detection signal,
The motor according to claim 1, wherein the second drive circuit energizes the coil of the second system such that a current having a phase opposite to the phase of the current flowing through the coil of the first system flows based on the position detection signal. apparatus. The position detection signal is a signal having a polarity,
2. The motor device according to claim 1, wherein the second drive circuit performs the energization by processing the position detection signal as a signal of a polarity opposite to the polarity processed by the first drive circuit. . Each of the first drive circuit and the second drive circuit controls an operation of the inverter circuit based on the inverter circuit having a first output terminal and a second output terminal, and the position detection signal. Control circuit unit, and
The inverter circuit of the first drive circuit energizes the coil of the first system based on control of the control circuit unit of the first drive circuit,
The inverter circuit of the second drive circuit energizes the coil of the second system based on control of the control circuit unit of the second drive circuit,
A polarity in which the first output terminal and the second output terminal in the first drive circuit and the coil of the first system are connected, the first output terminal in the second drive circuit, and the polarity The polarities to which the second output terminal and the coil of the second system are connected are the same, and
The position detection signal is a signal output by two positive and negative signal lines,
A signal line of the position detection signal connected to the control circuit unit of the first drive circuit, and a signal line of the position detection signal connected to the control circuit unit of the second drive circuit The motor apparatus according to claim 1, wherein the positive and negative values of are opposite to each other. Each of the first drive circuit and the second drive circuit controls an operation of the inverter circuit based on the inverter circuit having a first output terminal and a second output terminal, and the position detection signal. Control circuit unit, and
The inverter circuit of the first drive circuit energizes the coil of the first system based on control of the control circuit unit of the first drive circuit,
The inverter circuit of the second drive circuit energizes the coil of the second system based on control of the control circuit unit of the second drive circuit,
A polarity in which the first output terminal and the second output terminal in the first drive circuit and the coil of the first system are connected, the first output terminal in the second drive circuit, and the polarity The polarities to which the second output terminal and the coil of the second system are connected are the same, and
The position detection signal is a signal output by two positive and negative signal lines,
A signal line of the position detection signal connected to the control circuit unit of the first drive circuit, and a signal line of the position detection signal connected to the control circuit unit of the second drive circuit Both positive and negative are the same,
One of the control circuit unit of the first drive circuit and the control circuit unit of the second drive circuit inverts the positive / negative of the input position detection signal and inverts the position detection signal. The motor apparatus according to claim 1, wherein the energization is performed based on Each of the first drive circuit and the second drive circuit controls an operation of the inverter circuit based on the inverter circuit having a first output terminal and a second output terminal, and the position detection signal. Control circuit unit, and
The inverter circuit of the first drive circuit energizes the coil of the first system based on control of the control circuit unit of the first drive circuit,
The inverter circuit of the second drive circuit energizes the coil of the second system based on control of the control circuit unit of the second drive circuit,
A polarity in which the first output terminal and the second output terminal in the first drive circuit and the coil of the first system are connected, the first output terminal in the second drive circuit, and the polarity The polarities to which the second output terminal and the coil of the second system are connected are opposite to each other,
The position detection signal is a signal output by two positive and negative signal lines,
A signal line of the position detection signal connected to the control circuit unit of the first drive circuit, and a signal line of the position detection signal connected to the control circuit unit of the second drive circuit The motor apparatus according to claim 1 or 2, wherein the positive and negative of are both identical. A motor device comprising: a motor; a motor drive control device for controlling the drive of the motor; and a position detector for outputting a position detection signal according to a position of a rotor of the motor,
The motor includes a plurality of magnetic poles and a plurality of coils wound around a plurality of teeth, respectively.
Each of the plurality of coils is included in one of a first series of coils connected in series with each other and a second series of coils connected in series with each other,
The winding direction of the first series coil with respect to the teeth and the winding direction of the second series coil with the teeth are opposite to each other,
The combination of the teeth and the coils wound around the teeth is circumferentially arranged so that the coils of the first system and the coils of the second system are alternately arranged,
The motor drive control device has a first drive circuit and a second drive circuit to which the position detection signal is input, respectively.
The first drive circuit energizes the coil of the first system based on the position detection signal,
The motor device according to claim 1, wherein the second drive circuit energizes the coil of the second system so that the current having the same phase as the phase of the current flowing through the coil of the first system flows based on the position detection signal.

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