JP2017175899A - Opening/closing body drive motor and opening/closing body drive system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing drive motor (system) capable of sounding by itself to notify a predetermined opening/closing operation of an opening/closing body.SOLUTION: In an opening/closing body drive motor, a motor body is vibrated in an audible range by allowing a control frequency of PWM control to include a frequency (for example, 1 [kHz]) in an audible range so that a sounding operation is performed, in a section A4 where an FET of a drive circuit is driven to be turned on and off by the adjustment of the PWM control, thereby allowing window glass to be operated at a low speed.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an open / close body drive motor and an open / close body drive system for automatically opening and closing a power window, a slide roof, a slide door, and the like.

  In a power window system as an opening / closing body driving system for a vehicle, there is a vehicle having a function of notifying a warning with a speaker, a display, or the like if the window glass is not fully closed when the passenger gets off the vehicle (for example, Patent Document 1).

JP 2005-336831 A

  By the way, the present inventor has studied to notify a passenger or the like of a predetermined opening / closing operation of the window glass by driving the power window motor. With regard to this notification, we were also studying whether something could be done with a power window motor that is directly involved in the opening and closing operation of the window glass. The same applies not only to such a power window system but also to a system that automatically opens and closes a slide roof and a slide door.

  An object of the present invention is to provide an open / close body drive motor and an open / close body drive system capable of notifying a predetermined opening / closing operation of the open / close body by sounding itself.

  An opening / closing body drive motor that solves the above problems includes a motor body for automatically opening and closing a vehicle opening / closing body, a drive circuit that supplies drive power to the motor body, and the motor body that adjusts the drive power by PWM control. An open / close body drive motor comprising: a control circuit that controls the operation mode of the open / close body through a changeable circuit, wherein the PWM control unit of the control circuit normally sets the switching body of the drive circuit to ON by fixing the switching element of the drive circuit. In a section in which low speed operation is performed by driving on / off rather than operating at a speed, the control frequency in the PWM control includes the frequency in the audible range, and the sound generation operation is performed by vibrating the motor body in the audible range.

  According to this configuration, in the section in which the switching element of the drive circuit is driven on and off by adjusting the PWM control to operate the opening / closing body at a low speed, the control frequency of the PWM control includes the frequency of the audible range, and the motor body is audible. Sounding action is performed by vibrating. It is possible to notify a passenger or the like of a predetermined opening / closing operation of the opening / closing body by the sound generated by the motor body.

In the above opening / closing body drive motor, the section that performs the sound generation operation together with the low-speed operation of the opening / closing body is a section on the fully closed side of the opening / closing body that is closed.
According to this configuration, the sound generation notification in the section of the fully closed side of the opening / closing body to be closed can be performed to confirm the fully closed state of the opening / closing body, to alert the holding of the foreign object by the opening / closing body, or the like.

  In the opening / closing body drive motor, the PWM control unit repeats switching between the audible range and the non-audible range of the control frequency of the PWM control at least two times in the section in which the sound generation operation is performed.

According to this configuration, since the sound generation by the motor body is repeated two or more times during the sound generation operation section, it is possible to easily notice the sound generation by the motor body.
In the above opening / closing body drive motor, the control circuit is required to open / close the opening / closing body from the fully opened position to the fully closed position at the initial setting of the position detection of the opening / closing body. The PWM control unit locally sets the control frequency of the PWM control to an audible range at the fully open position and the fully closed position so that the fully open position and the fully closed position of the opening / closing body can be recognized respectively. Switch.

  According to this configuration, the control frequency of PWM control is locally switched to the audible range at the fully open position and the fully closed position of the opening and closing body, and the sound notification is made so that the fully open position and the fully closed position of the opening and closing body can be recognized respectively. Is made. As a result, at the initial setting of the position detection of the opening / closing body in the control circuit, when opening / closing the opening / closing body from the fully open position to the fully closed position, the opening / closing body can be easily and reliably arranged at each position. Is possible.

In the opening / closing body drive motor, the opening / closing body, which is an object to be opened / closed by the motor body, is a window glass provided in a vehicle door.
According to this configuration, sound is generated by the motor body in the power window motor that automatically opens and closes the window glass provided in the vehicle door.

In the above opening / closing body drive motor, the motor body is a motor with a brush.
According to this configuration, sound is generated by the brushed motor.
In the above opening / closing body drive motor, the motor body is a brushless motor.

According to this configuration, sound generation by the brushless motor is performed.
An open / close body drive system that solves the above problems includes an open / close body drive motor including a motor body for automatically opening and closing a vehicle open / close body, a drive circuit that supplies drive power to the motor body, and the drive power. An open / close body drive system comprising: a control circuit that adjusts by PWM control and controls the operation mode of the open / close body through the motor body so as to be changeable, wherein the PWM control unit of the control circuit includes a switching element of the drive circuit. In a section in which the opening / closing body is driven on / off rather than operating at a normal speed and is operated at a low speed rather than operating at a normal speed, the control frequency in the PWM control includes an audible frequency, and the motor body is vibrated in the audible range. Causes a pronunciation action.

  Even in this configuration, it is possible to notify a passenger or the like of a predetermined opening / closing operation of the opening / closing body by sound generation by the motor body.

  According to the opening / closing body driving motor and the opening / closing body driving system of the present invention, a predetermined opening / closing operation of the opening / closing body can be sounded and notified by itself.

The schematic block diagram of the system containing the power window motor in one Embodiment. Operation | movement explanatory drawing for demonstrating the operation | movement in the embodiment. Operation | movement explanatory drawing for demonstrating the operation | movement in a modification. Operation | movement explanatory drawing for demonstrating the operation | movement in a modification. The schematic block diagram of the system containing the power window motor in a modification. The schematic block diagram of the system containing the power window motor in a modification. The schematic block diagram of the system containing the power window motor in a modification. The schematic block diagram of the system containing the power window motor in a modification. The schematic block diagram of the system containing the power window motor in a modification. The schematic block diagram of the system containing the power window motor in a modification.

Hereinafter, an embodiment of a power window system as an opening / closing body drive system will be described.
As shown in FIG. 1, a power window system 10 mounted on a vehicle includes a power window motor 11 mounted in each door DR to automatically open and close the window glass WG of the vehicle door DR, and each door DR. A body ECU (Electric Control Unit) 21 that is communicably connected to the power window motor 11 is provided.

The power window motor 11 is configured by integrally assembling a motor body 12, a drive circuit 13, and a power window ECU (P / WECU) 14.
The motor body 12 is rotationally driven based on the supply of driving power from the driving circuit 13 and opens / closes the window glass WG in the vertical direction via a window regulator (not shown).

  The drive circuit 13 includes a relay circuit 13a and a field effect transistor (FET) 13b. The relay circuit 13a is a circuit that receives and supplies power from the vehicle-mounted battery BT and supplies and stops driving power for forward and reverse driving with respect to the motor body 12. The FET 13b, which is a semiconductor switching element, is subjected to PWM (Pulse Width Modulation) control and adjusts the driving power output from the relay circuit 13a. In other words, the relay circuit 13a performs forward or reverse driving of the motor body 12 and stops driving thereof, that is, operates in the opening or closing direction of the window glass WG and stops its operation, and the FET 13b controls the rotation speed of the motor body 12. Change, that is, change the operating speed of the window glass WG. Relay circuit 13 a and FET 13 b are controlled by P / WECU 14.

  The P / WECU 14 includes a PWM control unit 14a, a position / speed detection unit 14b, and a pinching processing unit 14c. The P / WECU 14 performs various controls related to the opening / closing operation of the window glass WG using the PWM control unit 14a, the position / velocity detection unit 14b, the sandwiching processing unit 14c, and the like. Here, when performing various controls, a rotation pulse signal synchronized with the rotation of the motor body 12 is input from the rotation sensor 15 to the P / WECU 14. The P / WECU 14 receives an open / close command signal from an open / close switch 20 provided in the vehicle door DR or the like.

  The P / WECU 14 feeds, for example, the motor main body 12 with respect to the relay circuit 13a when the open command signal is input, and reverses the motor main body 12 when the close command signal is input. The power supply direction is switched to a state where power can be supplied (ON). Further, in this case, the PWM control unit 14a of the P / WECU 14 outputs a PWM control signal to the control terminal of the FET 13b, and switches the FET 13b to be fixed on (duty 100%) or on / off driven at a predetermined frequency (variable duty). . When the input of the opening / closing command signal is lost, the P / WECU 14 stops (OFF) power supply to the motor main body 12 with respect to the relay circuit 13a, and the PWM control unit 14a switches the FET 13b off through the PWM control signal.

  The position / speed detector 14b detects the rotational position of the motor body 12, that is, the position of the window glass WG, based on the rotation pulse signal synchronized with the rotation of the motor body 12, specifically, based on the count of the edge of the pulse signal. I do. The position information of the window glass WG is stored in a memory (not shown) in the P / WECU 14 each time. Similarly, based on the rotation pulse signal, specifically, based on the length of the cycle of the pulse signal, the position speed detection unit 14b detects the rotation speed of the motor body 12 (the operating speed of the window glass WG). The slower the rotation speed of the motor body 12, the longer the period of the rotation pulse signal.

  When the rotational speed of the motor main body 12 that closes the window glass WG is reduced below the reference speed, the pinching processing unit 14c causes foreign matter to be caught between the window glass WG that is being closed and the vehicle door DR. It is determined that In this case, in the case where the operating speed of the window glass WG is changed midway according to the position of the window glass WG, the reference speed for determining the pinching is also changed as appropriate. When it is determined that the pinching has occurred, the pinching processing unit 14c controls the relay circuit 13a and the FET 13b so as to open the window glass WG, for example, by a predetermined amount so that the pinched foreign matter can be released. It is to be noted that the trapping processing unit 14c may determine whether or not the foreign matter generated between the window glass WG during the opening operation and the vehicle door DR is involved. In this case, the sandwiching processing unit 14c releases the trapped foreign matter. The relay circuit 13a and the FET 13b are controlled so that the window glass WG is closed, for example, by a predetermined amount as much as possible.

  The P / WECU 14 is communicably connected to a body ECU 21 that is a host ECU via a vehicle communication system. Examples of the vehicle communication system include LIN (Local Interconnect Network) communication, CAN (Controller Area Network) communication, and the like. The P / WECU 14 acquires necessary various vehicle information from the body ECU 21.

Next, the operation (action) of the power window system 10 will be described.
The P / WECU 14 adjusts the driving power (motor applied voltage) supplied from the drive circuit 13 to the motor main body 12 by PWM control of the FET 13b while recognizing the opening / closing position of the window glass WG, and the opening / closing operation speed of the window glass WG. Control is in progress. Among them, when closing the window glass WG, as shown in FIG. 2 (the position of the window glass WG is expressed as a window position), the P / WECU 14 decelerates in a predetermined manner from the normal speed when the window glass WG is nearly fully closed. Slow stop control is performed.

  Of all the processes for opening and closing the window glass WG, a section in the vicinity of the full-close of about 1/3 including the full-close position Px is set as the slow stop section A1. The slow stop section A1 is a section from the slow start position P0 where the slow stop is started to the fully closed position Px. Further, in the slow stop section A1, a predetermined position near the slow start position P0 (a position about 1/4 of the slow stop section A1) is a first position P1, and a predetermined position near the fully closed position Px (slow stop section A1). Is set as the second position P2.

  The window glass WG is closed at a normal speed before the slow stop section A1, whereas when the window glass WG reaches the slow start position P0, the window glass WG is decelerated to the next first position P1 and the window glass WG operates. The speed is gradually reduced from the normal speed to a predetermined low speed. When the window glass WG reaches the first position P1, the low-speed constant section A3 is set up to the fully closed position Px that has passed the next second position P2, and the operating speed of the window glass WG is set to a predetermined low speed constant.

  In performing the speed control of the above aspect, first, when the window glass WG is closed at a normal speed before the slow stop section A1, the PWM control unit 14a fixes the FET 13b on (duty 100%). That is, the PWM control unit 14a sets the motor applied voltage to the motor body 12 to the battery voltage Vb (about 12 [V]). Even when the FET 13b is fixed on (duty 100%), the control frequency of the PWM control is set to about 20 [kHz].

  Next, in a case where the speed is lower than the normal speed in the slow stop section A1, the PWM control unit 14a adjusts the duty from 100% downward, and drives the FET 13b on and off. In the deceleration zone A2 from the slow start position P0 to the first position P1, the PWM controller 14a gradually decreases the duty from 100% to α% (for example, 50%). That is, the PWM control unit 14a controls the motor applied voltage so as to gradually decrease from the battery voltage Vb (about 12 [V]) to the low speed drive voltage Va (for example, 6 [V]). In the low speed constant section A3 from the first position P1 to the fully closed position Px, the PWM control unit 14a fixes the duty at α%. That is, the PWM control unit 14a controls the motor applied voltage to be constant with the low speed drive voltage Va (for example, 6 [V]).

  Thus, in the vicinity of the fully closed position including the fully closed position Px of the window glass WG in which the slow stop section A1 is set, first, the fully closed position Px is also a mechanical lock position. Thus, the impact when the window glass WG is mechanically locked at the fully closed position Px is reduced. Further, in the wind glass WG in the closing operation, there is a concern that foreign objects may be pinched with the vehicle door DR. Therefore, by setting the slow stop section A1 to reduce the closing operation of the window glass WG, the foreign object pinching is prevented. The situation is unlikely to occur.

  In addition, the present inventor wants to notify the passengers of pronunciation of the situation where the window glass WG is fully closed in the vicinity of the fully closed state or the situation where foreign objects can be held. On the other hand, it is troublesome to connect the power window motor 11 (P / WECU 14) to an existing vehicle-mounted speaker or the like for sound generation notification, and it is desirable to avoid mounting a sound generation device separately in the vehicle.

  Therefore, focusing on the fact that the FET 13b is ON / OFF driven by PWM control in the slow stop section A1, in this embodiment, the PWM control unit in the section from the slow start position P0 to the second position P2 before the fully closed position Px. For example, about 1 [kHz] in the audible range is used as the control frequency of 14a, and this section is set as the sound generation operation section A4.

  Specifically, in the sound generation operation section A4, the PWM control unit 14a switches the control frequency from 1 [kHz] → 20 [kHz] →... → 1 [kHz] → 20 [kHz]. The period set to 1 [kHz] is, for example, 50 [ms], the period set to 20 [kHz] is, for example, 150 [ms], and the sounding operation section A4 is repeated two or more times. As a result, the vibration generated in the motor main body 12 is a vibration having a frequency corresponding to this in the period of 1 [kHz], and a vibration having a frequency corresponding to this in the period of 20 [kHz].

  That is, the vibration of the motor main body 12 becomes a sound within the human audible range during the period of the control frequency of 1 [kHz], and is inaudible within the period of 20 [kHz], and thus cannot be heard as a sound by the human. In the sound generation operation section A4, the control frequency switching from 1 [kHz] to 20 [kHz] is repeated a plurality of times, so that sound generation occurs every time the period of 1 [kHz] is reached. As described above, in this embodiment, the power window motor 11 (the motor body 12) itself generates a sound using the section in which PWM control is performed so as to change the speed of the window glass WG, and the passenger is notified. Done.

Next, characteristic effects of the present embodiment will be described.
(1) In the section A4 in which the FET 13b of the drive circuit 13 is driven on and off by adjusting the PWM control to operate the window glass WG at a low speed, the control frequency of the PWM control includes an audible frequency (for example, 1 [kHz]). Sound generation is performed by vibrating the motor body 12 in the audible range. The sound generated by the motor body 12 can notify a passenger or the like of a predetermined closing operation (closing operation in the section 4) of the window glass WG. In addition, the sound generation notification in the section A4 on the fully closed side of the window glass WG to be closed is a warning for holding a foreign object by the window glass WG, and is used for confirming the closing operation until the window glass WG is fully closed. You can also.

(2) Since the sound generation by the motor main body 12 is repeated two or more times in the sound generation operation section A4, the sound generation by the motor main body 12 can be easily noticed.
In addition, you may change the said embodiment as follows.

Although the sound generation notification is performed in the section A4 of the positions P0 to P2 of the window glass WG during the PWM control during the closing operation, this is an example and may be changed as appropriate.
For example, as shown in FIG. 3, in the fully closed section A5 from the second position P2 including the fully closed position Px to the fully closed position Px, the control frequency of the PWM control is set to the audible frequency (for example, 1 [kHz]). You may switch to. In this case, for example, the control frequency of the PWM control may be fixed at a frequency in the audible range, and the sound generation notification may be continued in the section A5. In this way, it can be used for confirming the fully closed state of the window glass WG.

  Further, as shown in FIG. 4, even during PWM control during open operation (during low speed operation), in the fully open section A6 from the near position Py1 including the fully open position Py of the window glass WG to the fully open position Py, the PWM control is performed. The control frequency may be switched to an audible frequency (for example, 1 [kHz]). Also in this case, for example, the control frequency of the PWM control may be fixed at the frequency of the audible range, and the sound generation notification may be continued in the section A6. If it does in this way, it can use for confirmation of the full open state of window glass WG, etc.

  Further, when the initial setting of the position detection of the window glass WG is performed in the P / WECU 14, when it is required to open and close the window glass WG once from the fully open position Py to the fully closed position Px, FIG. 4 and FIG. As in the embodiment, if the control frequency of PWM control is locally switched to the audible range at the fully open position Py and the fully closed position Px of the window glass WG, and the pronunciation notification is made so that each position Py, Px can be recognized, it is simple and reliable. In addition, the window glass WG can be arranged at each position Py, Px, and the above initial setting can be easily and reliably performed.

The numerical values used for the PWM control frequency, the positions P0 to P2, the voltages Va and Vb, the duty ratio α, etc. are examples and may be changed as appropriate.
The drive circuit 13 is composed of the relay circuit 13a and the FET 13b, but the configuration of the drive circuit is not limited to this. For example, a full bridge type drive circuit using four semiconductor switching elements such as FETs and two semiconductor switching elements The used half bridge type drive circuit may be used.

  The object to be opened and closed is the window glass WG and applied to the power window motor 11 (power window system 10) for opening and closing the window glass WG. However, other opening / closing body driving motors (opening / closing body driving system) of the vehicle such as a slide roof and a sliding door are used. You may apply to the motor (system) to drive.

  Although the drive circuit 13 and the P / WECU 14 are integrally provided in the power window motor 11, the drive circuit 13 and the P / WECU 14 are provided on the open / close switch 20 side, for example, as in the power window system 10a shown in FIG. You may provide integrally. Incidentally, the power window motor 11 side has a configuration in which the drive circuit 13 and the P / WECU 14 are omitted.

  Further, for example, a power window system 10b shown in FIG. 6 includes a door integrated ECU 22 that integrally controls electrical components related to the vehicle door DR, and the drive circuit 13 and the P / WECU 14 are integrally provided in the door integrated ECU 22. It may be. Also in this case, the power window motor 11 side has a simplified configuration. Incidentally, the door integrated ECU 22 performs not only power window control but also various controls of the door mirror 25, for example, and performs control via the relay circuit 23 and the motor 24 for each control target.

  -Although the position / velocity detection of the window glass WG is performed by the rotation sensor 15 for obtaining the rotation information of the motor main body 12, the current ripple of the motor main body 12 can be detected as in the power window system 10c shown in FIG. A current sensor 16 may be provided, and position / velocity detection (including pinching detection) of the window glass WG may be performed through the current sensor 16. Incidentally, the configuration of FIG. 7 is based on the configuration of FIG.

  Further, for example, as in a power window system 10d shown in FIG. 8, a touch sensor 17 (a sensor that detects contact with the door frame when the window glass WG is in the fully closed position) that can detect the fully closed position of the window glass WG. It is also possible to detect the fully closed position of the window glass WG through the touch sensor 17. Incidentally, the configuration of FIG. 8 is also based on the configuration of FIG.

  Although not specifically mentioned, a motor with a brush or a brushless motor is used for the motor body 12 of the power window motor 11. For example, in the power window systems 10e and 10f shown in FIGS. 9 and 10, a brushless motor is used for the motor body 12, and the drive circuit 13 is configured by an inverter circuit formed of a full bridge of FET or the like. 9 has a configuration in which the drive circuit 13 and the P / WECU 14 are integrally provided on the power window motor 11 side (based on the configuration in FIG. 1), and the system 10f in FIG. 10 has the drive circuit 13 and the P / WECU 14 Is integrally provided on the open / close switch 20 side (the configuration of FIG. 5 is a base).

  The combination of the embodiment and the modification may be changed as appropriate.

  DESCRIPTION OF SYMBOLS 11 ... Power window motor (opening / closing body drive motor), 12 ... Motor main body (opening / closing body drive motor), 13 ... Drive circuit, 13b ... FET (switching element), 14 ... Power window ECU (control circuit), 14a ... PWM control , DR ... vehicle door, WG ... window glass (opening / closing body), A1, A4, A5, A6 ... section, Px ... fully closed position, Py ... fully opened position.

Claims (8)

A motor body for automatically opening and closing a vehicle opening / closing body, a drive circuit for supplying driving power to the motor body, and adjusting the driving power by PWM control so that the operating mode of the opening / closing body can be changed through the motor body. An opening / closing body drive motor comprising a control circuit for controlling,
The PWM control unit of the control circuit has an audible range in the control frequency in the PWM control in a section in which the switching element of the drive circuit is fixed on and the switching body is driven on and off at a lower speed than the normal speed. An opening / closing body drive motor characterized by generating a sound generation operation by vibrating the motor body in an audible range with a frequency included. The opening / closing body drive motor according to claim 1,
The section in which the sound generation operation is performed together with the low speed operation of the opening / closing body is a section on the fully closed side of the opening / closing body to be closed. In the opening-and-closing body drive motor of Claim 1 or 2,
The opening / closing body drive motor, wherein the PWM control unit repeats switching of an audible range and a non-audible range of the control frequency of the PWM control at least two times in the section in which the sound generation operation is performed. In the opening-closing body drive motor of any one of Claims 1-3,
The control circuit is required to open and close the opening / closing body from the fully opened position to the fully closed position at the initial setting of the position detection of the opening / closing body,
The PWM control unit locally switches the control frequency of the PWM control to an audible range at the fully open position and the fully closed position so that the fully open position and the fully closed position of the opening / closing body can be recognized respectively. Opening and closing body drive motor characterized by. In the opening-closing body drive motor of any one of Claims 1-4,
The opening / closing body drive motor, wherein the opening / closing body to be opened / closed of the motor body is a window glass provided in a vehicle door. In the opening-closing body drive motor of any one of Claims 1-5,
The motor body is a motor with a brush. In the opening-closing body drive motor of any one of Claims 1-5,
The motor body is a brushless motor, and is an opening / closing body drive motor. An opening / closing body drive motor including a motor body for automatically opening / closing a vehicle opening / closing body, a drive circuit for supplying drive power to the motor body, and adjusting the drive power by PWM control, An opening / closing body drive system comprising a control circuit for controlling the operation mode to be changeable,
The PWM control unit of the control circuit has an audible range in the control frequency in the PWM control in a section in which the switching element of the drive circuit is fixed on and the switching body is driven on and off at a lower speed than the normal speed. An opening / closing body drive system characterized by causing a sound generation operation by causing the motor body to vibrate in an audible range with a frequency included.

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