WO2005018982A1

WO2005018982A1 - Motor speed control device and vehicle-use sheet device using the device

Info

Publication number: WO2005018982A1
Application number: PCT/JP2003/010809
Authority: WO
Inventors: Akihito Suzuki; Tomoyuki Kuroda
Original assignee: Toyota Shatai Kabushiki Kaisha
Priority date: 2003-08-26
Filing date: 2003-08-26
Publication date: 2005-03-03
Also published as: AU2003261736A1

Abstract

To simplify a motor speed control calculation and improve device reliability. A motor speed control device comprising a first pulse generating means for generating a pulse according to the rotation speed of a first motor, a second pulse generating means for generating a pulse according to the rotation speed of a second motor, and a second motor electric power control means that increments, with respect to an initial power to be supplied to the second motor, electric power by K1 every time a pulse signal is input from the first pulse generating means and decrements it by K2 every time a pulse signal is input from the second pulse generating means, characterized in that the relation, N1 × P1 × K1 = N2 × P2 × K2, holds between power K1 and power K2 when a ratio of rotation speed between the first motor and the second motor is set to N1:N2, and the generated numbers of pulses per motor unit rotation speed of the first pulse generating means and the second pulse generating means are respectively P1 and P2.

Description

Specification

Motor speed control device and vehicle seat device using the same

[Technical field]

The present invention relates to a plurality of motor speed control devices and a vehicle seat device using the same.

[Background technology]

By using the two motors as drive sources and rotating the vehicle seat body horizontally while sliding it in the front-rear direction of the vehicle, the seat body faces the front of the vehicle. 2. Description of the Related Art There is known a vehicle seat device with a slide and a rotation mechanism which can be moved between a position "1" and a position "1" that faces a doorway of a vehicle side.

In this vehicle seat device with a sliding and rotating mechanism, the sliding mode (first mode) and the rotating mode are used while the seat body is moving so that the movement locus of the seat body is constant. The motor speed is controlled so that the rotation speed ratio of the motor (second motor) is almost constant.

The speed control of the first motor and the second motor is performed by a control device 150 shown in FIG.

The controller 150 calculates the number of pulses generated according to the rotation speed of the first motor to determine the slide position of the seat body, and further accumulates the number of pulses generated according to the rotation speed of the second motor. The rotation position of the seat body is obtained by calculation, and whether the rotation position with respect to the slide position is appropriate is calculated, and the rotation speed of the first motor and the second motor is controlled based on the calculation result.

[Disclosure of the Invention]

However, in the above-described control device 150, speed control calculation is complicated, and it is necessary to store data obtained by cumulatively calculating the number of pulses, so that a trouble such as a power supply occurs during the operation of the seat body. If the data for which the cumulative number of pulses is calculated disappears, the speed control cannot be continued even if the power is turned on. The present invention has been made in view of the above problems, and an object of the present invention is to provide a highly reliable motor speed control device with simple control calculation.

The above-mentioned problems are solved by the following inventions.

The first invention includes a first pulse generating means for generating a pulse according to the rotation speed of the first motor, a second pulse generating means for generating a pulse according to the rotation speed of the second motor, With respect to the initial value of the power supplied to the motor, the power is increased by K1 every time a pulse signal is input from the first pulse generation means, and the power is increased by K each time a pulse signal is input from the second pulse generation means. A second motor power control means for decreasing by two, a rotation speed ratio between the first motor and the second motor is set to N1: N2, and the first pulse generating means and the second When the number of pulses generated per unit rotation with the pulse generation means is set to P1 and P2, respectively, between power 1 and power K2, N 1 XP 1 XK 1 = The relationship N2 XP 2 XK 2 holds.

According to the first invention, the power W supplied to the second motor is

W = [initial value] + [number of pulse inputs from the first pulse generation means] XK 1

-[Number of pulse inputs from second pulse generation means] Expressed by XK2. Further, [the number of pulse inputs from the first pulse generation means] is the actual rotation speed N it (average value) of the first motor XP 1 X the predetermined time T, and [the number of pulse inputs from the second pulse generation means] ] Is the actual rotation speed N2t (average value) XP2X for the second mode and the predetermined time T.

Here, since the relationship of N 1 XP 1 XK 1 = N2 XP 2 XK2 holds, if the rotation speeds of the first motor and the second motor are constant, the rotation speed of the first motor and the rotation speed of the second motor Since the ratio with the rotation speed is held at N 1: N 2, [the number of pulse inputs from the first pulse generation means] XK1 = [the number of pulse inputs from the second pulse generation means] ΧΚ 2 and the second motor Is equal to the initial value.

However, when the rotation speed of the first motor decreases or the rotation speed of the second motor increases, the ratio of the rotation speed of the second motor to the rotation speed of the first motor deviates from a predetermined value (N2 / N1). The number of pulses input from the first pulse generation means increases by XK1 and the number of pulse inputs from the second pulse generation means ΧΚ2. The power W supplied to is reduced from the initial value. As a result, the rotation speed of the second motor is reduced, and the ratio of the rotation speed of the second motor to the rotation speed of the first motor is controlled so as to converge to a constant value (N 2 / N 1).

When the rotation speed of the first motor increases or the rotation speed of the second motor decreases, the ratio of the rotation speed of the second motor to the rotation speed of the first motor decreases from a predetermined value (N 2 ZN 1). Then, [the number of pulse inputs from the first pulse generating means] XK 1> [the number of pulse inputs from the second pulse generating means] XK 2, and the power W supplied to the second motor increases from the initial value. As a result, the rotation speed of the second motor is increased, and control is performed so that the ratio between the rotation speed of the second motor and the rotation speed of the first motor converges to a constant value (N 2 / N 1).

In this way, every time a pulse signal from the first pulse generating means and the second pulse generating means is input to the second motor power control means, the power supplied to the second motor is increased or decreased to increase or decrease the power of the first motor. Since the ratio of the rotation speed of the second motor to the rotation speed is controlled to be constant, the number of pulses generated by the first pulse generation means and the second pulse generation means can be cumulatively calculated, as in the past, There is no need to calculate whether the number of pulses is appropriate or not, and the speed control calculation is simplified. Also, since the cumulative number of pulses is not calculated, speed control can be continued by turning on the power even if a trouble such as power off occurs during operation of the first and second motors. That is, the reliability of the second motor power control means increases.

Further, the second invention reduces the power supplied to the first motor when the time from the previous pulse generated by the first pulse generation means to the next pulse is shorter than the set time, When the time from one pulse to the next pulse is longer than the set time, a first motor power control means for increasing the power supplied to the first motor is provided. That is, the power supplied to the first motor can be adjusted by the first motor power control means so that the rotation speed of the first motor approaches the set rotation speed. A change in the rotation speed of the motor can be suppressed.

According to the above first or second invention, speed control calculation is simplified, and the reliability of the device is improved.

Further, the motor speed control device according to the first or second invention is used for a vehicle system. When used in a single device, the movement locus of the seat body can be made constant with a simple configuration.

FIG. 1 is a flowchart showing a speed control method of the motor speed control device according to the first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a speed control method of the first motor.

FIG. 3 is a flowchart illustrating a speed control method of the second motor.

FIG. 4 is a graph showing a change in electric power (PWM output value) supplied to the second motor and the like.

FIG. 5 is a graph showing a change in power (PWM output value) supplied to the second motor and the like.

FIG. 6 is a block diagram of the speed control device of the motor.

FIG. 7 is an exploded perspective view of the vehicle seat device.

FIG. 8 is a block diagram of a conventional motor speed control device.

[Best Mode for Carrying Out the Invention]

Hereinafter, a motor speed control device according to a first embodiment of the present invention and a vehicle seat device using the device will be described with reference to FIGS. The seat device for a vehicle according to the present embodiment turns the seat body toward the front of the vehicle by rotating the seat body horizontally while sliding the seat body in the vehicle front-rear direction using the two motors as drive sources.

This is a device that moves between the “seating position” and the “boarding / alighting position” that faces the entrance / exit on the side of the vehicle at a position in front of the seating position. Is controlled by Here, FIGS. 1 to 3 are flowcharts showing a method of controlling the speed of the motor speed control device, and FIGS. 4 and 5 show examples of changes in power (PWM output value) supplied to the second motor. It is a graph showing. FIG. 6 is a block diagram of a motor speed control device, and FIG. 7 is an exploded perspective view of a vehicle seat device.

As shown in FIG. 7, the vehicle seat device 1 includes a slide support 10 horizontally fixed to the floor (not shown) of the passenger compartment. A slide table 40 is installed on the upper side via a slide mechanism 20 so as to be able to slide in the front-rear direction of the vehicle. A seat frame 3 is installed on the slide table 40 via a rotation mechanism 50, and the seat body 2 is placed on the seat frame 3.

The slide mechanism 20 includes a pair of left and right holding mechanisms 22 for holding the slide table 40 so that the slide table 40 can move in the front-rear direction of the vehicle with respect to the slide support base 10, and the slide table 40. And a moving mechanism 30 for moving with respect to 10.

The holding mechanism 22 is composed of a rail-shaped fixed side holding member 24 extending in the vehicle front-rear direction, and a movable side holding member 26 slidable along the fixed side holding member 24. Left and right fixed side holding members 24 are fixed to both ends of the slide support 10.

The left and right moving side holding members 26 are fixed to the lower surface of the slide table 40 in a state of being sandwiched by the left and right fixed side holding members 24 from both sides in the width direction. The inner surface of the fixed-side holding member 24 and the outer surface of the movable-side holding member 26 are opposed to each other, and V-shaped grooves 24 a and 26 a extending in the longitudinal direction are formed on the inner surface and the outer surface. Is formed. A large number of steel balls (not shown) are fitted between the two V-shaped grooves 24a and 26a. As a result, the movable holding member 26 is slidable in the front-rear direction with respect to the fixed holding member 24, and is held immovable up and down.

The moving mechanism 30 includes a screw shaft 31 extending in the vehicle longitudinal direction, a slide nut 33 screwed with the screw shaft 31, and a first motor 35 for rotating the screw shaft 31 forward or reverse around the axis. It is composed of The screw shaft 31 is rotatably supported by a bearing member 32, and the bearing member 32 is fixed to the floor of the vehicle compartment. A power transmission member (not shown) for transmitting the torque of the first motor 35 to the screw shaft 31 is provided inside the bearing member 32.

A bracket 33 b is fixed to an upper portion of the slide nut 33, and the bracket 33 b is connected to a lower surface of the slide table 40.

With this structure, when the first motor 35 is driven and the screw shaft 31 rotates forward or backward, the slide nut 33 moves forward or backward along the screw shaft 31 by the action of the screw. Go to As a result, the slide table 40 connected to the slide nut 33 via the bracket 33b moves with the slide nut 33 relative to the slide support 10 in the vehicle front-rear direction.

The first motor 35 is provided with an encoder 35 e (see FIG. 6) for generating P 1 pulse per unit rotation speed of the first motor 35, and the output of the encoder 35 e is provided. Is transmitted to the control device 60.

That is, the encoder 35 e corresponds to the first pulse generating means of the present invention.

The rotation mechanism 50 installed on the slide table 40 includes a turntable 52. The turntable 52 is composed of an outer ring 52r provided with a gear 52w on the outer periphery and an inner ring 52e housed inside the outer ring 52r, and the outer ring 52r and the inner ring 5r. 2e is held so as to be relatively rotatable. The outer ring 52 r of the turntable 52 is fixed to the upper surface of the slide table 40, and the inner ring 52 e is fixed to the lower surface of the sheet frame 3. Further, on the lower surface of the seat frame 3, a driving gear 54 coupled with the gear 52w of the outer ring 52r is mounted in a horizontally rotatable state, and a second motor 56 is mounted on the driving gear 54. They are connected via power transmission members 56c (see Fig. 6).

With this structure, the second motor 56 is driven, and when the drive gear 54 rotates forward or reverse with respect to the gear 52 w of the outer ring 52 r, the slide table 4 on which the outer ring 52 r is fixed is formed. The sheet frame 3 to which the inner ring 52 e is fixed with respect to 0 and the sheet body 2 rotate in the horizontal direction.

The second motor 56 is provided with an encoder 56 e (see FIG. 6) for generating P 2 pulses per unit rotation speed of the second motor 56, and the output of the encoder 56 e is provided. Is transmitted to the control device 60.

That is, the encoder 56 e corresponds to the second pulse generating means of the present invention.

The control device 60 controls the rotation speed of the first motor 35 that is the drive source of the slide mechanism 20 and the rotation speed of the second motor 56 that is the drive source of the rotation mechanism 50. That is, the control device 60 corresponds to the first motor power control means and the second power control means of the present invention. Further, the control device 60, the encoders 35e, 56e, and the like correspond to the motor speed control device of the present invention. Next, a method of controlling the speed of the first motor 35 and the second motor 56 will be described based on the flowcharts of FIGS. 1 to 3 and the like. Here, each process shown in the flowchart is executed by a CPU (not shown) in the control device 60.

First, when an operation switch (not shown) is turned on (Step 101 in FIG. 1), the control device 60 supplies power (initial value W10) to the first motor 35, and the first motor 35 Is driven (step 102). Here, the initial value W 10 is a theoretical power value required to rotate the first motor 35 at a preset rotation speed N1 (hereinafter, referred to as a set rotation speed N1).

Further, electric power (initial value W20) is supplied from the control device 60 to the second motor 56, and the second motor 56 is driven (step 103). Here, the initial value W20 is a theoretical power value required to rotate the second motor 56 at a preset rotation speed N2 (hereinafter, referred to as a set rotation speed N2).

The following description will be made assuming that the actual rotation speed of the first motor 35 is N 1 t and the actual rotation speed of the second motor 56 is N 2 t.

The power supplied to the first motor 35 and the second motor 56 is controlled by the PWM control method. The PWM control method is a method of controlling the power supplied to the first motor 35 by changing the width of the ON pulse.

The speed control of the first motor 35 is performed based on the processing from step 11 1 to step 116 in FIG. The speed control of the first motor 35 is performed after a predetermined time has elapsed after the operation switch is turned ON.

First, the time Ts between the pulse signals input from the encoder 35e of the first motor 35 to the control device 60, that is, the time Ts from the previous pulse signal to the pulse signal input this time, is measured ( Step 1 1 1). Next, the measurement time T s is compared with the set time T 0 (step 1 12). Here, the set time TO is a time between pulse signals when the first motor 35 is rotating at the set rotation speed N1.

If the measurement time T s is longer than the set time TO, that is, if the rotation speed of the first motor 35 is lower than the set rotation speed N 1 (step 114 YE S), the PWM of the first motor 35 The output value is increased by a fixed amount H (step 1 15). As a result, the rotation speed of the first motor 35 increases, and the rotation speed of the first motor 35 is set. The rotation speed approaches Nl.

If the measurement time T s is shorter than the set time TO, that is, if the rotation speed of the first motor 35 is higher than the set rotation speed N 1 (step 1 14 NO), the PWM of the 1 ' Decrease the output value by a fixed amount Η (step 1 16). As a result, the rotation speed of the first motor 35 decreases, and the rotation speed of the first motor 35 approaches the set rotation speedΝ1.

As described above, while the first motor 35 is being driven, the processing from step 11 1 to step 11 is repeatedly executed, whereby the rotation speed of the first motor 35 is maintained at the set rotation speed Ν 1. As described above, the speed control of the first motor 35 is performed. Next, the speed control of the second motor 56 will be described with reference to FIGS. The speed control of the second motor 56 is also performed after a predetermined time has elapsed after the operation switch is turned on.

After the start of the speed control, when the first pulse signal is input from the encoder 35 e of the first motor 35 to the control device 60 (step 12 1 YES), the PWM output value S (0) ( = Power K1 is added to the initial value W20) (Step 122). Here, n is set to 1 because the pulse signal is the first pulse signal. Therefore, the PWM output value S (1) of the second mode 56 at this time is equal to the initial value W20 + K1.

Next, when the second pulse signal is input from the encoder 35 e of the first motor 35 to the control device 60 (step 1 2 1 YES), the power K1 is added to the PWM output value S (1) of the second motor 56. They are added (step 122). Therefore, the PWM output value of the second motor 56 at this time is S (2) = S (1) + K1. The PWM output value S (2) of the second motor 56 can be represented by an initial value W20 + 2XK1.

Next, when the third pulse signal is input from the encoder 56 e of the second motor 56 to the control device 60 (step 123 YE S), the power K2 is obtained from the PWM output value S (2) of the second motor 56. Is subtracted (step 124). Therefore, the PWM output value S (3) S (2) -1 K2 of the second mode 56 is obtained. Here, the PWM output value S (3) can be represented by an initial value W20 + 2XK1-K2. Therefore, in general, the PWM output value S (n) of the second motor 56 is the initial value W 20 + [the number of pulse signal inputs of the first motor 35] XK1— [the number of pulse signal inputs of the second motor 56] ] XK 2 ... ①Expression

Here, the following relationship exists between the electric power K1 added by the input of the pulse signal of the first motor and the electric power K2 subtracted by the input of the pulse signal of the second motor. It holds.

That is, N 1 XP 1 XK 1 = N 2 XP 2 XK 2... As described above, N1 is the set rotation speed of the first motor 35, and N2 is the set rotation speed of the second motor 56. P 1 is the number of pulse signals per unit rotation of the first motor 35, and P 2 is the number of pulse signals per unit rotation of the second motor 56. For this reason, if the first motor 35 and the second motor 56 are rotating at the set rotation speeds N 1 and N 2 for the predetermined time T, respectively, the number of pulse signal inputs of the first motor 35 2 N 1 XP 1 XT… ③ formula, [Number of pulse signal inputs to the second motor 56] = N 2 XP 2 XT ... formula.

Therefore, substituting equation (2), equation (3) and equation (2) into equation (2) above gives

The PWM output value S (n) of the second motor 56 becomes the initial value W20. Thus, the rotation speed of the second motor 56 is maintained at the set rotation speed N2.

However, for example, when the rotation speed Nlt of the first motor 35 is lower than the set rotation speed N1, the [number of pulse signal inputs of the first motor 35] is smaller than when the motor is rotating at the set rotation speed N1. Therefore, in equation (1), [the number of pulse signal inputs of the first motor 35] XK1 is smaller than [the number of pulse signal inputs of the second motor 56] XK2.

That is, if [the number of pulse signal inputs of the first motor 35] XK 1— [the number of pulse signal inputs of the second motor 56] ΧΚ2 = ο;

The PWM output value S (η) of the second motor 56 is represented by S (η) = initial value W20−α. As described above, since the PWM output value S (η) of the second motor 56 becomes smaller than the initial value W20, the rotation speed Ν 2 t of the second motor 56 also decreases from the set rotation speed N 2.

Conversely, when the rotation speed N 1 t of the first motor 35 increases from the set rotation speed N 1, Since the number of pulse signal inputs to the first motor 35 is larger than when rotating at the set rotation speed N1, the number of pulse signal inputs to the first motor 35 in equation (1) XK1 is 2 Number of pulse signals input to motor 56] It becomes larger than XK2. That is, [the number of pulse signal inputs of the first motor 35] XK1— [the number of pulse signal inputs of the second motor 56] XK 2 =

The PWM output value of the second motor 56 is represented by S (n) initial value W 20 +. As described above, since the PWM output value S (n) of the second motor 56 becomes larger than the initial value W20 by j3, the rotation speed N2t of the second motor 56 increases from the set rotation speed N2. As described above, since the rotation speed N 2 t of the second motor 56 increases or decreases in accordance with the increase or decrease of the rotation speed N 1 t of the first motor 35, the rotation speed N 1 t of the first motor 35 with respect to the rotation speed N 1 t of the first motor 35 increases. (2) The ratio (N2t / Nlt) of the rotation speed N2t of the motor 56 is maintained at a substantially constant value (N2 / N1).

Next, using FIG. 4 and FIG. 5, a specific description will be given of how the PWM output value S (n) of the second motor 56 changes during the speed control of the second motor. Here, the graphs of FIGS. 4 and 5 show that N 1: N 2 = 2: 1 P 1 = P 2, initial value W 20 = 100, and Kl = l Κ 2 = Κ 1 X (Ν 1 · Ρ 1 ÷ Ν 2 · Ρ 2) It was created under the conditions of 2-2. The initial values W20 = 100 Κ 1 = 1 and Κ 2 = 2 are relative values (no unit).

The horizontal axis L in Figs. 4 and 5 is the time axis, and the numeral 120202 below the horizontal axis L indicates the number of program processing times for the speed control of the second motor (see Fig. 3). ing. Further, a bar graph shows the input timing (example) of the pulse signal (black: first motor, white: second motor).

That is, at the time of the first program processing (L = l, see Fig. 4), the first pulse signal (n = 1) is input from the encoder 35e of the first motor 35, so that the PWM output of the second motor 56 Value S (1) = Initial value W20 + K 1 = 100 + 1 = 10 1 At the time of the second program processing (L = 2), since no pulse signal is input, the PWM output value of the second motor 56 is held at S (1) = 101. At the time of the third program processing (L = 3), since the second pulse signal (n = 2) is input from the encoder 35e of the first motor 35, the PWM output value S ( 2) = S (1) + K 1 = 101 + 1 = 102

During the fourth program processing (L = 4), since the third pulse signal (n = 3) is input from the encoder 56e of the second motor 56, the PWM output value S ( 3) = S (2) — K 2 = 102— 2 = 100

In this manner, if one pulse signal of the second motor 56 is input for two pulse signals of the first motor 35 within a predetermined time, the PWM output value S (n) of the second motor 56 becomes Converges to initial value 100. That is, if the first motor 35 is rotating at the set rotation speed N1, the speed of the second motor 56 is also controlled to rotate at the set rotation speed N2 (= N1 ÷ 2).

However, for example, as shown in the time of the eighth program processing (L = 8) to the time of the twelfth program processing (L = l2), the first time within the predetermined time (L == 8 to L = 12) M When the number of pulse signals input to the first motor 35 increases, the rotation speed N lt of the first motor 35 increases and the number of pulse signal inputs of the first motor 35 increases compared to when the first motor 35 rotates at the set rotation speed N1. The 56 PWM output values S (9) to (12) increase. As a result, the rotation speed N 2 t of the second motor 56 increases following the rotation speed of the first motor 35, and the rotation speed ratio of the second motor 56 to the first motor 35 (N 2 t / N 1 t) is kept almost constant (N2 / N 1).

For example, as shown in the fourteenth program processing (L = 14) to the eighteenth program processing (L = l8), the first program processing is performed within a predetermined time (L = l4 to L = 18). When the number of pulse signals input to the first motor 35 decreases as compared with the case where the rotation speed N 1 t of the motor 35 decreases and the first motor 35 rotates at the set rotation speed N 1, the second motor 56 PWM output values S (14) to (18) decrease. As a result, the rotation speed N 2 t of the second motor 56 decreases following the rotation speed N 1 t of the first motor 35, and the rotation speed ratio of the second motor 56 to the first motor 35 (N2 t / N 1 t) is kept at a nearly constant value (N2 / N1).

Next, the operation of the vehicle seat device 1 will be briefly described.

First, when the operation switch is turned on in a state where the seat body 2 is in the “seated position” facing the front of the vehicle, the first motor 35 of the slide mechanism 20 is driven to rotate forward, and the second motor of the rotation mechanism 50 is further rotated. 56 is driven forward. As a result, the slide mechanism 2 With the function of 0, the slide table 40, the rotation mechanism 50, and the sheet body 2 advance with respect to the slide support 10 and the function of the rotation mechanism 50 moves the sheet body 2 to the left with respect to the slide table 40. Rotate horizontally in the direction.

At this time, the load applied to the first motor 35 of the slide mechanism 20 changes depending on the place where the vehicle is parked. For example, when the vehicle is parked such that the front side of the vehicle is higher, the load applied to the first motor 35 is greater than when the vehicle is parked horizontally. For this reason, the rotation speed of the first motor 35 becomes lower than the set rotation speed N1, and the sliding speed of the seat body 2 and the like decreases. At this time, since the speed control program of the second motor 56 (see Fig. 3) operates, if the rotation speed of the first motor 35 decreases, the PWM output value of the second motor 56 decreases, The rotation speed of the motor 56 also decreases.

That is, the rotation speed of the second motor 56 decreases following the rotation speed of the first motor 35, and the rotation speed ratio of the second motor 56 to the first motor 35 (N 2 t / N 1 t) is kept at a substantially constant value (N2 / N1). Therefore, as the sliding speed of the seat body 2 or the like decreases, the rotational speed of the seat body 2 also decreases, and the sliding position of the seat body 2 corresponds to the rotating position.

In addition, since the speed control program of the first motor 35 also operates at the same time, when the rotation speed of the first motor 35 becomes lower than the set rotation speed N1, the PWM output value of the first motor 35 increases, The rotation speed N lt of motor 35 rises and converges on the set rotation speed N 1.

In this way, the seat body 2 and the like slide to the forward limit position, and the seat body 2 is horizontally rotated by about 90 ° to the left. The limit SW etc. operate, and the first motor 35 and the second motor 56 stop. This position is the “boarding / alighting position”, and the seat body 2 is held in a state of facing the side of the vehicle at the doorway (leftward).

To return the seat body 2 from the "ride position" to the "seated position", the operation switch is used to drive the first motor 35 and the second motor 56 in reverse, and the slide table 40 and rotating mechanism 50 Then, the seat body 2 is retracted with respect to the slide support 10 and the sheet body 2 is horizontally rotated rightward with respect to the slide tape 40. This At this time, as described above, the speed control program of the second motor 56 (see Fig. 3) works, so that the rotation speed of the second motor 56 is controlled so as to follow the change in the rotation speed of the first motor 35. And the rotation speed ratio of the second motor 56 to the first motor 35 (N

2 t / N lt) is kept almost constant (N2 / N 1). Thereby, the slide position and the rotation position of the sheet main body 2 correspond to each other. Also, the first motor

By the operation of the speed control program 35, the rotation speed Nlt of the first motor 35 is controlled to converge on the set rotation speed N1.

When the seat body 2 is returned to the “seated position”, the backward limit switch, the right rotation limit switch, and the like operate, and the first motor 35 and the second motor 56 stop. As described above, in the motor speed control device in the vehicle seat device 1 described above, in order to control the ratio of the rotation speed of the second motor 56 to the rotation speed of the first motor 35 to be constant, the first pulse generation means is used. Each time a pulse signal from the (encoder 35e) and the second pulse generation means (encoder 56e) is input to the control device 60, the PWM output value of the second motor 56 is merely increased or decreased by a certain amount. Unlike the related art, there is no need to cumulatively calculate the number of pulses generated by the first pulse generating means and the second pulse generating means or to calculate whether the number of pulses is appropriate. As a result, speed control calculation is simplified, and it is not necessary to store the data obtained by cumulatively calculating the number of pulses, and even if a trouble such as power-off occurs during operation of the first and second motors, the power supply can be turned off. If ON, speed control can be continued. That is, the reliability of the second motor power control means increases.

In the speed control method of the second motor according to the present embodiment, the case where N 1: N 2-2: 1, P 1 = P 2, and Kl = l has been described as an example, but Ν 1, Ν 2 , Ρ1, Ρ2, Κ1 etc. can be set to any values.

Claims

The scope of the claims

1. First pulse generation means for generating a pulse according to the rotation speed of the first motor, second pulse generation means for generating a pulse according to the rotation speed of the second motor, and supply to the second motor With respect to the initial value of the power, the power is increased by K1 each time a pulse signal is input from the first pulse generation means, and the power is reduced by K2 each time a pulse signal is input from the second pulse generation means And second motor power control means for causing

The ratio of the rotation speeds of the first motor and the second motor is set to N1: N2, and the number of pulses generated per motor rotation of the first pulse generator and the second pulse generator is respectively The motor speed characterized by the relationship of N1XP1XK1 = N2XP2XK2 between power 1 and power K2 when set to P1 and P2. Control device.

2. The motor speed control device according to claim 1,

If the time from the previous pulse generated by the first pulse generation means to the next pulse is shorter than the set time, the power supplied to the first motor is reduced, and the power from the previous pulse to the next pulse is reduced. A motor speed control device comprising: first motor power control means for increasing power supplied to a first motor when the time is longer than a set time.

3. A second motor used as a drive source for a rotation mechanism that rotates the seat body substantially horizontally;

A first motor used as a drive source of a slide mechanism that slides the seat body together with the rotation mechanism in the front-rear direction of the vehicle,

The first motor of the sliding mechanism and the second motor of the rotating mechanism rotate so that the seat body rotates from the seating position facing the front of the vehicle to the riding position facing the entrance at the side of the vehicle in the process of sliding forward. A motor speed control device for controlling the rotation speed,

3. A vehicle seat device, wherein the motor speed control device according to claim 1 is used as the motor speed control device.