KR100787694B1 - Driving control device of electric folding outside mirror for vehicle - Google Patents

Abstract

According to the present invention, when the outside mirror is folded or unfolded, gearing of the outside mirror mechanism causes the circuit break time to be delayed during the time constant even when an in-rush current and a current exceeding the reference current flow during initial operation. The circuit break time is delayed during time constant due to instantaneous forward and reverse operation or overload caused by various reasons, so that the outside mirror does not stop in the middle of operation. The short, the motor can be prevented from burning, and the circuit break time is not increased or decreased in accordance with the external temperature change, and the drive control device for a motorized folding outside mirror for a vehicle can be prevented from being burned at a constant time. As,

A power supply unit for supplying power, a relay switch connected in series between the power supply unit and the ground, a PTC element, a first resistor, a triac, a motor, a PNP transistor connected to the power supply unit, and A second diode having an anode terminal connected to the collector terminal of the PNP transistor, a third capacitor connected between the power supply unit and the base terminal of the PNP transistor, and a base of the PNP transistor connected to the power supply unit. An NPN transistor having a base terminal connected to a terminal, a first diode having a cathode terminal connected to a collector terminal of the NPN transistor, and an anode terminal connected to a cathode terminal of the second diode; Is connected between the connection point of the anode terminal of the diode and the cathode terminal of the second diode and ground A second coil connected between the relay coil, a second resistor connected between the base terminal of the NPN transistor and the second terminal of the triac, and a second terminal connected between the power supply unit and the second terminal of the triac. And a first capacitor connected between the power supply unit and the triac gate terminal, and a third resistor connected in parallel with the first capacitor.

Description

Driver control device of electric folding outside mirror for vehicle {Driver for outside mirror of the vehicle}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a motor current waveform diagram of a drive control apparatus for a conventional motorized folding outside mirror for a vehicle.

2 is a surge voltage waveform diagram of a drive control apparatus for a conventional vehicle-foldable outside mirror.

3 is a motor current waveform diagram of a conventional drive control apparatus for a motor-foldable outside mirror for a vehicle.

4 is a circuit diagram of a drive control apparatus for a motor-foldable outdoor mirror for a vehicle according to an exemplary embodiment of the present invention.

5 is a motor current waveform diagram of a drive control apparatus for an electric folding outside mirror for a vehicle according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

B +: Power supply part P1: PTC element

TA: Triac Q1, Q2: Transistor

D1, D2: Diode M: Motor

C1, C2: Capacitor R1 ~ R3: Resistance

The present invention relates to the field of a mirror drive device. More specifically, even when an in-rush current and a current exceeding a reference current flow during initial operation due to engagement of gears of an outside mirror mechanism when the outside mirror is folded or unfolded. The circuit break time is delayed during the time constant to extinguish it, and the outside mirror stops in the middle of operation due to the delay of the circuit break time during the time constant even when the momentary reverse operation or overload caused by various causes flows for a certain time. This does not occur, and the circuit breaker switching time is relatively short to prevent the motor burnout, and the circuit breaker time is not increased or decreased due to the external temperature change and is always cut off at a constant time to prevent the burnout of the motor. The present invention relates to a drive control apparatus for an electric folding outside mirror. .

Outside mirrors play an important role in driving safety by allowing the driver to understand the situation around the car.

However, since the outside mirror protrudes on the front side of the vehicle, there is a very high possibility of causing an accident caused by the outside mirror when parking in a narrow space or when crossing a narrow road. .

In order to solve such a problem, a technology for a folding folding outside mirror that enables a driver to control folding and unfolding of the outside mirror in a driver's seat has been developed. The driving device for driving the folding folding outside mirror has been developed. The related art was disclosed in “Switch Circuit in Driving Device” of Japanese Utility Model Application Publication No. Hei 4-76196 (published: July 2, 1992), and also Korean Utility Model Application Publication No. 96-268889 "Automatic folding rearview mirror control circuit for automobiles" (Date: August 7, 1996) and "Power folding rearview mirror for automobiles" of No. 97-6175 (Date: March 28, 1997) Control device ”,“ Electrically folded rear view mirror drive device for automobiles ”of No. 97-8049 (filed April 27, 1997), and No. 97-9725 (filed date: May 1997 AD) Day 1) of “Automotive Electric There bars disclosed by the present applicant, etc. to graft rearview mirror drive circuit. "

The conventional electric folding outside mirror drive devices, when the outside mirror is rotated and positioned at the stop position, the outside mirror cannot be rotated any more, thereby overloading the forward and reverse drive motors, and thus overcurrent flows, thereby causing PTC (Positive). Temperature Coefficient) The temperature of the device is increased to increase the resistance of the PTC (Positive Temperature Coefficient) device, thereby blocking the current path by the PTC device, that is, the circuit is blocked using the switching characteristic of the PTC device.

However, these conventional electric folding outside mirror drive devices, due to the characteristics of the PTC element, the time it takes for the temperature to rise until the resistance increases, that is, the switching time takes a relatively long time, so that the circuit break is delayed in the state of overcurrent. There is a problem that will cause the damage of the motor.

In order to solve this problem, by using the voltage drop of the resistance generated when an overcurrent flows to lower the voltage applied to the relay coil below the open voltage, the circuit is cut off relatively quickly before the operating characteristics of the PTC device is achieved. Therefore, a technique for preventing the motor from being burned by an overcurrent has been disclosed in the "Vehicle Electric Rear View Driving Device" of Korean Patent Registration No. 10-0359438 (Notice date: November 7, 2002).

However, the conventional " vehicle electric rearview mirror drive device " described above, as shown in Fig. 1, is inrushed into the motor during initial operation by the gears of the outside mirror mechanism when the outside mirror is folded or unfolded (In- Rush) If a current over a reference current and a reference current flows for a predetermined time (several ms to several tens of ms), a mechanical locking phenomenon occurs and a circuit may not operate instantly.

In addition, in the conventional "vehicle electric rearview mirror drive apparatus" described above, as shown in FIG. 2, the overload (surge voltage) generated during instantaneous forward / backward driving or various causes is constant for a predetermined time (several ms to several tens of ms). If it flows, there is a problem that the circuit is immediately cut off and the outside mirror stops in the middle of the operation.

In addition, the conventional "vehicle electric rearview mirror drive device" as described above, as shown in Figure 3, there is a problem that a relatively long circuit break switching time can cause a burnout of the motor with a durability problem.

In addition, the conventional " vehicle electric rearview mirror drive device " described above is out of the circuit due to the component capacity value and the motor quiescent current distribution immediately when the reference current is exceeded, as shown in FIG. There is a problem in that it is difficult to cope with the overload and abnormal load caused by various causes during side mirror operation.

In addition, as shown in FIG. 3, the above-described conventional "electric vehicle rearview mirror drive device for a vehicle" has a short circuit break time at high temperatures and a long circuit break time switching time at low temperatures due to external temperature changes, resulting in damage to the motor. There is a problem that can bring.

In addition, the above-described conventional "motor vehicle rearview mirror driving device" has a problem in that the folding or unfolding operation is instantaneously performed during the outside mirror operation, but the maximum current is generated in the motor so that the circuit does not operate instantaneously.

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems as described above, by engaging the gears of the outside mirror mechanism when the outside mirror is folded or unfolded. The present invention provides a drive control apparatus for an electric folding outside mirror for a vehicle that can extinguish a circuit break time during a time constant even when a current flows.

Another object of the present invention is a motor-powered out-of-vehicle which does not occur a phenomenon in which the outside mirror stops in the middle of the operation due to a delay in circuit interruption during the time constant even when a momentary constant driving or overload caused by various causes flows for a certain time. The present invention provides a drive control apparatus for a side mirror.

It is still another object of the present invention to provide a drive control apparatus for a motor-foldable outside mirror for a vehicle which can prevent burnout of a motor due to a relatively short circuit breaking switching time.

Still another object of the present invention is to provide a drive control apparatus for an electric folding outside mirror for a vehicle, which can prevent the burnout of a motor by being cut off at a constant time without increasing or decreasing the circuit break time according to an external temperature change.

As a means for achieving the above object, the configuration of the present invention includes a power supply unit for supplying power, a relay switch, a PTC element, a first resistor, a triac, and a motor connected in series between the power supply unit and the ground. And a third capacitor connected between the PNP transistor connected to the power supply unit, a second diode having an anode terminal connected to the collector terminal of the PNP transistor, and a base terminal of the power supply unit and the PNP transistor. And a NPN transistor connected to the power supply unit and a base terminal connected to the base terminal of the PNP transistor, and a cathode terminal connected to the collector terminal of the NPN transistor, and connected to the cathode terminal of the second diode. A first diode to which an anode terminal is connected, an anode terminal of the first diode, and the second A relay coil connected between the connection point of the cathode terminal of the ion and ground, a second resistor connected between the base terminal of the NPN transistor and the second terminal of the triac, the power supply unit, and the A second capacitor connected between the second terminal of the triac, a first capacitor connected between the power supply unit and the gate terminal of the triac, and a first capacitor connected in parallel with the first capacitor. It consists of three resistors.

According to the configuration of the present invention, the third capacitor and the second resistor, when the voltage drop occurs in the PTC element and the first resistor to operate the transistor, by delaying for a predetermined time corresponding to the time constant time motor It is preferable to extend the operation time of.

The configuration of the present invention is preferably such that the diode restricts the surge current and the surge voltage generated in both directions in the above motor so as to protect the transistor which is a switching element so that the circuit is not broken or interrupted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings in order to describe in detail enough to enable those skilled in the art to easily carry out the present invention. . Other objects, features, and operational advantages, including the object, operation, and effect of the present invention will become more apparent from the description of the preferred embodiment.

For reference, the embodiments disclosed herein are only presented by selecting the most preferred embodiment in order to help those skilled in the art from the various possible examples, the technical spirit of the present invention is not necessarily limited or limited only by this embodiment Rather, various changes, additions, and changes are possible within the scope without departing from the spirit of the present invention, as well as other equivalent embodiments.

4 is a circuit diagram of a drive control apparatus for a motor-foldable outdoor mirror for a vehicle according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the configuration of the drive control apparatus for a motor-foldable outdoor mirror according to an embodiment of the present invention includes a power supply unit B + for supplying power, the power supply unit B +, and grounding. The emitter terminal is connected to the relay switch RS, the PTC element P1, the first resistor R1, the triac TA, the motor M, and the power supply unit B + connected in series between them. The PNP transistor Q2 connected to the second diode D2 having an anode terminal connected to the collector terminal of the PNP transistor Q2, and the base terminal of the power supply unit B + and the PNP transistor Q2. NPN transistor Q1 having a third capacitor C3 connected between and an emitter terminal connected to the power supply unit B +, and a base terminal connected to the base terminal of the PNP transistor Q2. The cathode terminal is connected to the collector terminal of the NPN transistor Q1. And a first diode D1 having an anode terminal connected to the cathode terminal of the second diode D2, an anode terminal of the first diode D1, and a cathode of the second diode D2. A relay coil RC connected between the connection point of the terminal and the ground, and between the base terminal of the NPN transistor Q1 and the second terminal T2 of the triac TA. A second capacitor C2 connected between the second resistor R2, the power supply unit B + and the second terminal T2 of the triac TA, the power supply unit B + and the And a first capacitor C1 connected between the gate terminals G of one triac TA, and a third resistor R3 connected in parallel with the first capacitor C1. .

According to the above configuration, the operation of the drive control apparatus of the electric folding outside mirror for a vehicle according to an embodiment of the present invention is as follows.

As the DC current flows through the first capacitor C1 at the initial stage of power application, a trigger pulse is generated and input to the gate terminal of the triac TA, thereby turning on the triac TA.

When the triac TA is turned on as described above, the power supply unit B + relay switch RS PTC element P1 first resistor R1 triac TA motor M ground GND. As the current path leading to the current flows in the motor M, the motor M is operated to fold or unfold the outside mirror.

Since the NPN transistor Q1 and the PNP transistor Q2 are not operated even when the triac TA is on, the potential difference does not occur in the relay coil RC so that the relay switch RS is kept on because it is not excited. Therefore, the motor M continues to operate until the outside mirror reaches the folded position or the unfolded position.

In this case, when the voltage drop occurs in the PTC element P1 and the first resistor R1 and the transistors Q1 and Q2 operate, the third capacitor C3 and the second resistor R2 are time constants. By delaying the predetermined time corresponding to the time (R2 * C3) serves to extend the operating time of the motor (M).

When the motor M continues to operate and the outside mirror reaches the folded or unfolded position, a sudden load is generated from the motor M while the motor M is stopped by the mirror stopper mechanism. The voltage drop occurs in the PTC element P1 and the resistor R1 in proportion to the load generated from the motor M. FIG. When a voltage drop occurs in the PTC element P1 and the resistor R1 as described above, a constant voltage is applied to the NPN transistors Q1 and PNP transistors Q2, which are current switching elements, so that the transistors Q1 and Q2 conduct. By-pass flows through the transistors Q1 and Q2. As a result, a potential difference is generated at both ends of the relay coil RC to excite, so that the movable contact C of the relay switch RS is connected from the B contact to the A contact. do. As such, when the relay switch RS is turned off, the triac TA is turned off so that the power supply part B +, the relay switch RS, the PTC element P1, the resistor R1, the triac TA, and the motor M As no current is supplied to the current path leading to) -ground (GND), the current flow is also completely blocked in the motor (M).

After the triac TA is turned off, the voltage applied to the NPN transistors Q1 and PNP transistors Q2, which are current switching elements, disappears. When the transistors Q1 and Q2 are turned off, the excitation of the relay coil RC is turned off. As the state disappears, the movable contact A of the relay switch RS is reduced back to the contact B, and the triac TA is in an off state unless a trigger pulse is applied to the gate terminal G of the triac TA. It keeps to block the drive of the motor (M).

On the other hand, when the input voltage is switched instantaneously during the forward or reverse operation of the motor M, and the momentary reverse or reverse operation of the motor M occurs, the surge current generated in both directions in the motor M, By limiting the surge voltage to the diodes D1 and D2, the transistors Q1 and Q2, which are switching elements, are momentarily protected so that the circuit is not broken or interrupted. 5 is a motor current waveform diagram of a drive control apparatus for an electric folding outside mirror for a vehicle according to an embodiment of the present invention. If there are no diodes D1 and D2, the maximum current and voltage are applied to the switching elements transistors Q1 and Q2 by the surge current and the surge voltage of the motor M, and the circuit is broken or cut off. Since normal reverse driving is impossible, diodes D and D2 are required. In the case where the cars alternate with each other on a narrow road, the role of the diodes D1 and D2 in the circuit is very important because the mirrors must be straightened out after the mirrors are completed.

As described in the above embodiments, the present invention provides a time constant even when an in-rush current and a current higher than the reference current flow during initial operation by engaging the gears of the outside mirror mechanism when the outside mirror is folded or unfolded. It can be extinguished due to the delay of circuit break time, and the circuit break time is delayed during the time constant even when instantaneous reverse operation or overload caused by various causes passes for a certain time. In addition, the circuit breaker switching time is relatively short to prevent the burnout of the motor, the circuit breakdown time is not increased or decreased according to the external temperature change at all times to have the effect of preventing the burnout of the motor.

Claims (3)

A power supply unit for supplying power, a relay switch connected in series between the power supply unit and the ground, a PTC element, a first resistor, a triac, a motor, a PNP transistor connected to the power supply unit, and A second diode having an anode terminal connected to the collector terminal of the PNP transistor, a third capacitor connected between the power supply unit and the base terminal of the PNP transistor, and a base of the PNP transistor connected to the power supply unit. An NPN transistor having a base terminal connected to a terminal, a first diode having a cathode terminal connected to a collector terminal of the NPN transistor, and an anode terminal connected to a cathode terminal of the second diode; Connected between the connection point of the anode terminal of the diode and the cathode terminal of the second diode and ground Is a relay coil, a second resistor connected between the base terminal of the NPN transistor and the second terminal of the triac, and a second terminal connected between the power supply unit and the second terminal of the triac. And a first capacitor connected between the power supply unit and the triac gate terminal, and a third resistor connected in parallel with the first capacitor. Driving control device of side mirror. According to claim 1, The third capacitor and the second resistor prolong the operating time of the motor by delaying a predetermined time corresponding to the time constant time when a voltage drop occurs in the PTC element and the first resistor to operate the transistors. Drive control device of the electric folding outside mirror for the vehicle, characterized in that. The method according to claim 1 or 2, A driving control apparatus for an electric folding outside mirror for a vehicle, characterized in that the diode is limited to surge current and surge voltage generated in both directions in the motor to protect the transistor as a switching element so that the circuit is not broken or cut off.

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