JP2004352041A - Positional controller and air-conditioner for automobile - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device capable of setting an optional position without any influence by temperature control performance. <P>SOLUTION: An electric motor control device connected to a damper comprises: an energization time storage means for storing the characteristics of the relationship between a detected position by a position detecting means of the damper and energization time from the starting point of the electric motor to the detected position; an energization time difference operating means for operating the energization time difference of the electric motor when the electric motor reaches from the detection displacement to the target position on the basis of the characteristics of the relationship; and a motor control means for transferring the damper by energizing to the electric motor on the basis of the energization time difference. Thus, since the influence of the opening difference in the target range upon the temperature control performance is prevented, and the influence of the voltage difference of the electric motor is reduced, life-shortening of the electric motor by hunting of the control is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drive device, particularly to position control of a damper or the like in an automotive air conditioner.
[0002]
[Prior art]
With reference to FIGS. 7 and 8, a description will be given of a damper control device in a conventional automotive air conditioner.
As shown in FIG. 7, a conventional general control device includes a damper, a servomotor (electric motor) 29 whose motor shaft rotates slowly by a reduction gear, a lever connected to the motor shaft to drive the damper, It includes a variable resistor (potentiometer) 24 directly connected to the motor shaft, and a control device 150 that detects the position of the damper based on the voltage and drives the servomotor 29 via the motor driver 42.
[0003]
Furthermore, a motor having a speed reduction mechanism, a movable member that is connected to a motor shaft that rotates at a reduced speed and driven, and has one or more types of displacement points set, and a load applied to the motor when the movable member is displaced to the displacement point The load member is arranged so as to increase or decrease, the motor current detecting means for detecting the current flowing through the motor, the displacement information of the movable member before the current is supplied to the motor, and the change of the detected motor current. There has been proposed a device having a displacement detecting means for detecting whether the movable member has changed to a predetermined displacement point based on the displacement (see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-9-164836 (page 6, FIG. 5, FIG. 6, FIG. 7)
[0005]
[Problems to be solved by the invention]
However, in the control device having the above-described variable resistor, a hysteresis as shown in FIG. 8 is provided for the control. There were problems such as differences.
[0006]
Further, in an electric drive device in which a movable member such as a damper is driven by a motor, the potentiometer 24 is eliminated, and in a control device having a movable member in which a displacement point is set, an arrangement of a load member is required for displacement detection. Therefore, there is a problem that the method cannot be applied to a case where it is necessary to detect an arbitrary position and set it to an arbitrary position like an air mix damper.
[0007]
The present invention has been made in view of such a problem, and an object of the present invention is to provide a control device that has no difference in temperature controllability and can be set at an arbitrary position.
[0008]
[Means to solve the problem]
(1) The present invention has been made to solve the above-described problems, and as a first means,
An electric motor connected to the damper;
Position detecting means provided on the electric motor shaft for detecting the position of the damper,
In an electric motor control device that moves the damper to a target position by the electric motor,
Energization time storage means for storing a relationship characteristic between a detection position of the damper position detection means and an energization time from a starting point of the electric motor to the same detection position,
Energizing time difference calculating means for calculating the energizing time difference of the electric motor from the detection position to the target position based on the relationship characteristic,
Motor control means for energizing the electric motor based on the energization time difference and moving the damper.
[0009]
(2) Further, the relation characteristic stored in the storage means can be modified based on the actual operation result of the electric motor.
[0010]
(3) In addition, in an air conditioner for an automobile, which includes various dampers, drives the dampers via an electric motor, and air-conditions a vehicle interior to a predetermined temperature.
A control device for the electric motor that drives at least one damper is the above-described electric motor control device.
[0011]
(4) Further, the invention is characterized in that the damper is an air mix damper for adjusting a mixing ratio of cold air and hot air.
[0012]
(5) a position detecting means for detecting a position of the driving means;
Driving time storage means for storing a relationship characteristic between a position detected by the position detection means of the driving means and a driving time from the starting point of the driving means to the same detection position;
A drive time difference calculating means for calculating a drive time difference of the drive means from the detection position to the target position based on the relationship characteristic; and a control means for driving the drive means based on the drive time difference. I have.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall schematic configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention, FIG. 2 is a configuration diagram of a control device of the electric damper, FIG. 3 is a control explanatory diagram, and FIG. 4 is a control block diagram. is there.
FIG. 5 is an external view of the electric motor according to the first embodiment of the present invention.
FIG. 6 is a diagram showing an output relationship between the electric motor and the potentiometer according to the first embodiment of the present invention.
[0014]
In FIG. 1, an automotive air conditioner (hereinafter, referred to as “air conditioner”) 1 housed in a casing 2 is installed in front of the automobile.
On the upstream side of the casing 2, an inside air suction port 3 and an outside air suction port 4 are provided. The inside air suction port 3 and the outside air suction port 4 are opened and closed by an inside / outside air switching damper 8 operated by an electric motor 28 with a reduction gear based on a command from the control device 41.
[0015]
On the downstream side of the inside / outside air switching damper 8 in the casing 2, a blower 11 driven by a drive blower motor 22 is provided, and is controlled based on a command from a control device 41.
[0016]
An evaporator 12 is provided at a central portion in the casing 2. The refrigerant pipe connects the evaporator 12, the compressor 15, the condenser 16, the receiver 17, the expansion valve 18 and the like to form a refrigerant circulation circuit. The compressor 15 is driven by a traveling engine 21 via a magneto clutch 20 and a pulley 19. Further, a pressure sensor 23 for detecting the refrigerant pressure at the inlet of the compressor 15 is arranged in the refrigerant pipe on the inlet side of the compressor 15.
[0017]
Further, an air mix damper 13 and a heater core 14 are disposed downstream of the evaporator 12 in the casing 2. Note that cooling water from the traveling engine 21 is circulated through the heater core 14 via a hot water pipe (not shown).
The air mix damper 13 is opened and closed by an electric motor 29 with a reduction gear based on a command from the control device 41. Further, a potentiometer 24 for detecting the opening degree of the air mix damper 13 is connected to the air mix damper 13 or provided on the electric motor 29 shaft.
[0018]
A face outlet 5 and a foot outlet 6 are provided downstream of the casing 2. The face outlet 5 and the foot outlet 6 are opened and closed by a blow mode switching damper 9 operated by an electric motor 30 with a speed reducer based on a command from the control device 41.
[0019]
Further, a defrost blowout port 7 is provided in the upper portion on the downstream side of the casing 2. The defrost blowout port 7 is opened and closed by a blowout mode switching damper 10 operated by an electric motor with a speed reducer (not shown) based on a command from the control device 41.
[0020]
Further, the control device 41 is connected to detection values of the solar radiation sensor 25, the outside air temperature sensor 26, the vehicle interior temperature sensor 27, and the like, and the control operation panel 40.
[0021]
In the above-described vehicle air conditioner, when the air conditioner 1 is operated, the blower 11 is driven. Then, the vehicle interior air from the inside air suction port 3 or the outside air from the outside air suction port 4 selected by the switching of the inside / outside air switching damper 8 is sucked into the casing 2. The inhaled air exchanges heat with the refrigerant in the process of flowing through the evaporator 12 and is cooled.
[0022]
The cooled air is diverted by the air mix damper 13, a part of which is heated by flowing through the heater core 14, and is mixed with the air downstream of the heater core 14 in a portion bypassing the heater core 14. In this way, the mixing ratio of the cool air and the warm air is adjusted by the air mix damper 13, and the conditioned air is obtained.
The conditioned air is selected by opening and closing the blowout mode switching dampers 9 and 10, and is blown into the vehicle cabin through the face blowout port 5, the foot blowout port 6, or the defrost blowout port 7.
[0023]
On the other hand, various detection value signals such as a pressure sensor 23 for detecting an inlet refrigerant pressure of the compressor 15, a potentiometer 24 for detecting an opening degree of the air mix damper 13, a solar radiation sensor 25, an outside air temperature sensor 26, and a vehicle interior temperature sensor 27 are provided. Are input to the control device 41. Further, various output signals such as a room temperature setting device (not shown), an inside / outside air changeover switch, an operation switch, a blowout mode switch, an operation mode switch, and a fan switch, which are provided on the control operation panel 40, are also transmitted to the control device 41. Is entered.
[0024]
In the control device 41, various drive signals are arithmetically processed based on these input values, and the magneto clutch 20 of the compressor 15, the blower motor 22 for driving the blower 11, and the electric motor of the inside / outside air switching damper 8 are driven via the drivers (not shown). The motor 28, the electric motor 29 of the air mix damper 13, the electric motor 30 of the blow mode switching damper 9, and the like are driven to control the operation of the air conditioner 1 according to the conditions inside and outside the vehicle.
[0025]
Next, control of the air mix damper 13 will be described with reference to FIGS.
As shown in FIG. 2, the control device 41 is provided with a temperature control command value calculation device 50 composed of a microcomputer for driving the electric motor 29 of the air mix damper 13, and a motor driver 42 composed of a thyristor stack and the like. ing.
[0026]
The compressor 15, the magneto clutch 20, the blower motor 22, the electric motor 28 of the inside / outside air switching damper 8, and the blowout mode switching damper are based on the temperature regulation command value calculated by the temperature control command value calculation device 50 composed of a microcomputer. Each motor such as the electric motor 30 is driven through a motor driver (not shown).
[0027]
A potentiometer 24 using a variable resistor is connected to the air mix damper 13 or directly connected to the shaft of the electric motor 29. The potentiometer 24 detects the opening of the airmic damper 13, and the energization time difference calculation circuit (Sequence or means) 52 outputs the change position.
[0028]
The energization time difference calculation circuit 52 calculates the energization time of the electric motor 29 from the energization time storage circuit (memory or means) 51 based on the data of the change position, and outputs the result to the motor control circuit (sequence or means) 53. Output.
The motor control circuit 53 drives the electric motor 29 for the air mix damper 13 via the motor driver 42 in response to the signal output from the energization time difference calculation circuit 52 in the temperature control command value calculation means 50.
[0029]
Next, the details of the control will be described.
The energization time storage circuit 51 stores the position of the potentiometer 24 of the electric motor for controlling the air mix damper 13, that is, the position of the air mix damper 13, and the electric motor from the starting point to the detection position as shown in FIG. Operation characteristics indicating the relationship with the motor energization time of No. 29 are stored.
[0030]
As the operation characteristics, here, one of two operation characteristics of an operation A straight line A and an operation B curve B described below is prepared for the air mix damper 13. The operating characteristics stored in the energization time storage circuit 51 are not limited to these two examples, and it goes without saying that various modifications can be used.
[0031]
The operation characteristic of the straight line A indicated by the solid line A in FIG. 3 is that the point where the air mix damper 13 is fully closed (the energizing time is zero) and the point where the air mix damper 13 is fully opened (the energizing time is the maximum value) are linearly connected. Line.
[0032]
The operation characteristic of the operation B curve B indicated by the broken line is that the position of the potentiometer 24 and the starting point between the point where the air mix damper 13 is fully closed (the energizing time is zero) and the point where the air mix damper 13 is fully open (the energizing time is the maximum value). Data measured or calculated in advance is stored in relation to the relationship between the current and the detection position and the energization time of the electric motor 29. This stored data can be corrected by the learning function during actual operation.
[0033]
Next, the details of the control will be described with reference to FIG. Here, the case where the operation A straight line A is set will be described.
When the operation of the air conditioner 1 is started, first, various output signals such as a room temperature setting device, an inside / outside air changeover switch, an operation switch, a blowing mode switch, an operation mode switch, and a fan switch are transmitted from the control operation panel 40 to the control device 41. Is entered. Similarly, various detection value signals of the pressure sensor 23, the potentiometer 24 for detecting the opening degree of the air mix damper 13, the solar radiation sensor 25, the outside air temperature sensor 26, the vehicle interior temperature sensor 27, and the like are input to the control device 41. .
[0034]
Based on these input signals, a temperature control command value calculation device 50 composed of a microcomputer calculates a temperature control command value. Then, the target position X2 of the air mix damper 13 is set in step 1 based on the temperature control command value. This target position signal X2 is transmitted to the energization time difference calculation circuit 52 in the temperature control command calculation device 50.
On the other hand, in step S2, the current position X1 of the air mix damper 13 is measured by the potentiometer 24 and transmitted to the energization time difference calculation circuit 52.
[0035]
In step S3, the energization time difference calculation circuit 52 calculates the energization time Ta2 of the target position shown in FIG. 3 corresponding to the received target position X2.
[0036]
On the other hand, in step 4, the energization time Ta1 of the current position shown in FIG. 3 is calculated based on the received current position X1.
Then, in step S5, the energization time difference between the energization time Ta2 at the target position and the energization time Ta1 at the current position is calculated, and the motor drive time and direction of the electric motor 29 are calculated.
Steps 1 to 4 may be performed in parallel.
[0037]
In step 6, the motor control circuit 53 sets a motor drive time.
In step 7, the electric motor 29 is driven via the motor driver 42 based on the data on the motor driving time and the direction.
[0038]
In Step 8, after the driving of the electric motor 29 is completed, the position after the movement is measured by the potentiometer 24.
Thus, it is confirmed in step S9 that the driving of the motor has been completed.
If there is a difference between the moved position and the target position X2, the process returns to step 3 again, and the operations of steps 5 to 8 are repeated.
[0039]
Next, a case where the operation B straight line B is set will be described.
In step S3, the energization time difference calculation circuit 52 calls up the energization time Tb2 at the target position shown in FIG. 3 from the storage circuit 51 based on the received target position X2.
On the other hand, in step 4, based on the received current position X1, the energization time Tb1 of the current position shown in FIG.
[0040]
Thereafter, in step S5, a difference between the energization time Tb2 at the target position and the energization time Tb1 at the current position is calculated, and the motor drive time and direction of the electric motor 29 are calculated.
[0041]
In step 6, the motor control circuit 53 sets a motor drive time.
In step 7, the electric motor 29 is driven via the motor driver 42 based on the data on the motor driving time and the direction.
[0042]
In step 8, the position after the movement is measured by the potentiometer 24.
Thus, it is confirmed in step S9 that the driving of the motor has been completed.
[0043]
If the operation B straight line B has been set, in step S10, an energization time difference corresponding to the difference between the moved position and the target position X2 is calculated, and stored in the storage circuit 51 based on the energization time difference. The data of the operating B curve B is corrected.
Thereafter, the process returns to step S3, and repeats the processing from step S5. The operation is completed when the error falls within the allowable range.
[0044]
As described above, the present invention has been described with reference to the illustrated embodiments. However, the present invention is not limited to the above embodiments, and it is needless to say that various changes may be made to the specific structure within the scope of the present invention. Nor.
[0045]
That is, in the above-described first embodiment, an example has been described in which the driving device is an electric motor. However, the driving device (means) is not limited to the electric motor, and other motors (electric servomotor, prime mover, engine , Hydraulic motors) and actuators (air pumps, air cylinders).
[0046]
The driven device is not limited to a damper, but can be applied to a door, various moving devices, a turning object, and the like.
Further, the position detecting means is not limited to a potentiometer, and various position detectors such as a tachometer can be applied.
[0047]
Next, correction of a detection error or the like of the potentiometer 24 or the like in the air mix damper 13 will be described with reference to FIGS. The following embodiment describes the air mix damper 13, but is not limited thereto, and can be applied to other dampers.
In the electric motor 29 having the speed reduction mechanism of the air mix damper 13, a control for holding the air mix damper 13 in a state where the air mix damper 13 is pressed to the opening / closing end point thereof is generally adopted in order to maintain a sealed state and prevent air leakage. .
[0048]
In this case, it is necessary to correct a correction amount due to an error in the speed reduction mechanism (transmission gear or the like), an error in the potentiometer 24 for detecting the displacement position, an error in mounting the electric motor 29 having the speed reduction mechanism, and the like.
[0049]
Therefore, in consideration of the stop position of the air mix damper 13 set by the lock determination of the electric motor 29 performed in advance or the thickness of the air leakage sealing of the air mix damper 13 in the correction value storage circuit 54, the lock position is determined before the lock position. Or the operating error α of the drive shaft 31 of the electric motor 29, the mounting error β due to the mounting hole 32 of the electric motor 29 having the reduction mechanism, the voltage error γ for the output signal of the potentiometer 24, etc. The stopped position range of the air mix damper 13 and the like are stored.
[0050]
Then, the target position (X2) from the operation panel 40 is corrected based on the operation error α, the mounting error β, or the output signal voltage error γ stored in the correction value storage circuit 54 in advance. Thereafter, the energization time is called from the energization time storage circuit 51 for the correction target value (X2 + α + γ) obtained by adding the error to the target position. Then, based on this value, the electric motor 29 is output to the motor driver 42 to control the driving of the electric motor 29. Therefore, the electric motor 29 is not locked and the electric motor 29 is not damaged, and the life of the electric motor 29 is not shortened. In addition, it is possible to prevent the air from leaking due to the damper gap.
[0051]
In addition, since the range of the stop position of the damper is set in advance from each error range of the electric motor 29 and is stored and controlled in the correction value storage circuit 54, the influence of the error of the electric motor 29 and its mounting hole 32 is prevented. The stop position of the air mix damper 13 can be stopped at the target position.
[0052]
Further, there is no need to add a link for correcting these errors, and there is an advantage that cost increase can be avoided.
[0053]
【The invention's effect】
As described in detail above, the electric motor control device according to claim 1 includes an electric motor connected to a damper, and position detection means provided on the electric motor shaft and detecting a position of the damper, In an electric motor control device for moving the damper to a target position by an electric motor, an energization time storage for storing a relation characteristic between a position detected by the position detection means of the damper and an energization time from a starting point of the electric motor to the same detection position. Means, an energization time difference calculating means for calculating an energization time difference of the electric motor from a detected displacement to a target position based on the relation characteristic, and a motor for energizing the electric motor and moving the damper based on the energization time difference Control means.
With the above-described configuration, the damper reaches the target position based on the characteristic of the relationship between the detected position of the damper stored in the energization time storage unit and the energization time from the starting point of the electric motor to the detection position. Is obtained and the electric motor is energized by the difference in the energization time, so that the damper operates to the target position and stops. In this way, it is possible to set and control the target position and the target opening degree, and to prevent the influence on the temperature controllability due to the difference in the opening degree of the reversal of the target range as in the related art. Since the influence of the voltage difference is reduced, it is possible to prevent the life of the electric motor from being shortened due to control hunting.
[0054]
Further, in the electric motor control device according to claim 2, the relation characteristic stored in the energization time storage means can be modified based on the actual operation result of the electric motor, and the relation characteristic can be modified by a learning function. Correction can be performed, and more appropriate control can be performed.
[0055]
According to the third aspect of the present invention, in an automotive air conditioner that includes various dampers, drives the dampers via an electric motor, and air-conditions a vehicle interior to a predetermined temperature, at least one of the dampers is driven. Since the control device for the electric motor is configured as described above, it is possible to obtain an air conditioner for an automobile that is less susceptible to voltage fluctuations of a battery mounted on the automobile.
[0056]
Further, according to the fourth aspect of the present invention, since the damper is an air mix damper that adjusts a mixing ratio of cold air and hot air, the air mix damper can be set at an arbitrary position.
[0057]
Further, the position control device according to claim 5, wherein a position detecting means for detecting a position of the driving means, a position detected by the position detecting means of the driving means, a driving time from a starting point of the driving means to the same detecting position, Drive time storage means for storing the relationship characteristic of the drive time, drive time difference calculation means for calculating the drive time difference of the drive means from the detected displacement to reach the target position based on the relationship characteristic, and the target from the detected displacement based on the relationship characteristic A drive time difference calculating means for calculating a drive time difference of the drive device until reaching the position, and a control means for driving the drive means based on the drive time difference, wherein a door, various moving devices, It is applicable to various devices such as a turning object.
[Brief description of the drawings]
FIG. 1 is an overall schematic configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention.
FIG. 2 is a configuration diagram of a control device of the electric damper according to the first embodiment of the present invention.
FIG. 3 is a control explanatory diagram according to the first embodiment of the present invention.
FIG. 4 is a control block diagram according to the first embodiment of the present invention.
FIG. 5 is an external view of the electric motor according to the first embodiment of the present invention.
FIG. 6 is a diagram showing an output relationship between the electric motor and the potentiometer according to the first embodiment of the present invention.
FIG. 7 is a configuration diagram of a conventional control device.
FIG. 8 is a diagram showing control contents of an electric motor in a conventional control device.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 air conditioner 2 casing 3 inside air inlet 4 outside air inlet 5 face outlet 6 foot outlet 7 defrost outlet 8 inside / outside air switching damper 9 blowing mode switching damper 10 blowing mode switching damper 11 blower 12 evaporator 13 air mix damper 14 heater core 15 Compressor 16 Capacitor 17 Receiver 18 Expansion valve 19 Pulley 20 Magneto clutch 21 Running engine 22 Blower motor 23 Pressure sensor 24 Potentiometer 25 Solar radiation sensor 26 Outside air temperature sensor 27 Vehicle interior temperature sensor 28, 29, 30 Electric motor 31 Drive shaft 32 Mounting hole Reference Signs List 40 Control operation panel 41 Control device 42 Motor driver 50 Temperature control command value calculation device 51 Power-on time storage circuit 52 Power-on time difference calculation circuit 53 Motor control circuit 54 Correction value storage time

Claims (5)

An electric motor connected to the damper;
Position detecting means provided on the electric motor shaft for detecting the position of the damper,
In an electric motor control device that moves the damper to a target position by the electric motor,
Energization time storage means for storing a relationship characteristic between a detection position of the damper position detection means and an energization time from a starting point of the electric motor to the same detection position,
Energizing time difference calculating means for calculating the energizing time difference of the electric motor from the detection position to the target position based on the relationship characteristic,
A motor control means for energizing the electric motor based on the energization time difference and moving the damper. 2. The electric motor control device according to claim 1, wherein the relation characteristic stored in the energization time storage unit can be modified based on a result of actual operation of the electric motor. 3. An automotive air conditioner that includes various dampers, drives the dampers via an electric motor, and air-conditions a vehicle interior to a predetermined temperature.
An air conditioner for an automobile, wherein the control device for the electric motor that drives at least one of the dampers is the electric motor control device according to claim 1. The automotive air conditioner according to claim 3, wherein the damper is an air mix damper that adjusts a mixing ratio of cold air and hot air. Position detecting means for detecting the position of the driving means,
Driving time storage means for storing a relationship characteristic between a position detected by the position detection means of the driving means and a driving time from the starting point of the driving means to the same detection position;
A driving time difference calculating unit that calculates a driving time difference of the driving unit from the detection position to the target position based on the relationship characteristic; and a control unit that drives the driving unit based on the driving time difference. Position control device.

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