KR101468022B1 - The smart servo of remote control object - Google Patents

Abstract

The present invention relates to a smart servo for a remote control. The smart servo for the remote control according to an embodiment of the present invention includes: a case body (100), a wire connection connector part (200), an RC servo motor (300), a potentiometer (400), a servo motor driver part (500), a PMIC part (600), and a deceleration gear box part (700). The smart servo for the remote control according to the embodiment of the present invention efficiently discharges high heat generated in the RC servo motor through a heat dissipation coolant member around the inner wall of a receiving space part for the RC servo motor. Therefore, the smart servo for the remote control according to the embodiment of the present invention improves a heat dissipation effect and reduces a failure rate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a smart servo for remote control,

The present invention relates to a smart servo for a remote control (RC) that can be applied to a model airplane, a model ship, a model helicopter, and a military small search helicopter.

Generally, a remote control (RC) toy such as a helicopter toy or an automobile toy is provided with a servo motor assembly for controlling the toy and a battery for supplying power to the servo motor assembly.

The servo motor assembly for a remote control (RC) toy includes a drive motor, a deceleration unit that decelerates and outputs the output from the drive motor, an output shaft that is rotated by the drive motor via the deceleration unit, A rotation amount detector for detecting the rotation amount, and a servo control unit for controlling the rotation of the drive motor in accordance with the signal detected from the rotation amount detector.

On the other hand, since the remote control (RC) toy is easily exposed to the external environment, there is a danger that the output shaft can be easily rotated by the external force when the driving motor is continuously supplied with power and the driving motor is not forcibly stopped.

Therefore, in the remote control (RC) toy, even if the driving motor is to be stopped, power must be continuously supplied from the battery to the driving motor in order to keep the driving motor stopped.

Due to such a problem, the battery of the remote control (RC) toy is easily discharged, and as a result, the use time of the battery is rapidly shortened.

In order to solve such a problem, Korean Utility Model Registration No. 20-0455047

housing ; A drive motor incorporated in the housing; A drive spur gear mounted concentrically to a motor shaft of the drive motor; A first reduced speed spur gear which is rotatably disposed on the housing so that its rotational axis is parallel to the motor shaft of the drive motor and is coupled to the drive spur gear at the input side in a spur gear, A reduction gear portion for reducing the rotational force of the drive spur gear and outputting the reduced rotational speed to the first helical gear helical gear; A worm gear body rotatably disposed on the housing such that a rotary shaft thereof is orthogonal to the reduction gear portion, and a second screw gear helical gear gear-coupled to the first screw gear helical gear at an input side; An output shaft rotatably disposed on the housing such that a rotational axis thereof is orthogonal to the worm gear body, the worm wheel being coupled with the worm gear; A rotation amount detector which is installed in the housing and is positioned at one end of the output shaft and detects a rotation amount of the output shaft; A servo control unit for controlling the rotation of the driving motor in accordance with a signal detected from the rotation amount detector; And a servo motor assembly for a toy,

This is because there is no construction for dissipating the high heat generated in the drive motor inside the housing, and the device is frequently broken due to the overload of the drive motor, and power is supplied from the battery to the drive motor only when the drive motor is rotated through the rotation amount detector Therefore, there is a problem that the power consumption of the rechargeable battery is consumed as quickly as the conventional device because the battery is always rotated in the actual flying state.

In addition, the conventional servo motor assembly notifies the control device of whether there is an abnormality in the internal device or the rechargeable battery, so there is no device for real-time checking by the user, and the power supply is smooth In case of not doing so, the toilets are rotated and fall down to the ground without wired flight. Therefore, the toys are frequently damaged due to collision.

Registration Utility Model Bulletin No. 20-0455047 (issued on August 16, 2011)

In order to solve the above problems, according to the present invention, it is possible to effectively dissipate the high heat generated from the RC servo motor through the heat-radiating refrigerant member around the inner wall of the housing space for the RC servo motor, The state of one rechargeable battery and the overload state of the RC servo motor can be notified to the control device through the wireless communication module so that the user can check the state of the RC servo motor in real time in real time, Output voltage can be controlled by Proportional Integral Differential (PID) control proportional to the angle, and RC servo motor can be precisely controlled, and control structure can be changed without changing hardware (circuit) through digital servo driver construction , Remote control (RC, remote control) that can improve the power consumption compared to the conventional one because the parts of the circuit are small Bit there is provided a servo.

In order to achieve the above object, a smart servo for a remote control (RC) according to the present invention comprises:

A case body 100 having a square block structure for protecting and supporting each device from external pressure,

A wire connection connector unit 200 formed at a lower end of the case body and connected to the rechargeable battery to supply power to each device, receive command signals from the wireless communication module and transmit the command signals to the PMIC unit,

An RC servo motor (300) inserted in the case body and generating a rotational force in response to a driving signal of the servo motor driving driver section and receiving a rotational force from the potentiometer to transmit the rotational force to the final output gear;

A potentiometer 400 located at one side of the output shaft of the RC servo motor for varying the resistance while rotating with the RC server motor and transmitting the rotational position of the output shaft to the PMIC unit with the measured voltage,

A servomotor driver section 500 located at one side of the RC servo motor for controlling the driving of the RC servo motor under the control of the PMIC section,

An overload detection sensor unit 600 positioned at one side of the RC servo motor for sensing an overload state of the RC servo motor and transmitting the detected overload state to the PMIC unit,

It is located at the lower side of the servo motor driver part and connected with RC servo motor and servo motor driver part. It controls high output voltage and low output voltage required by RC device by one chip and outputs it by PWM (Pulse Width Modulation) Controls to reduce the conduction loss of the RC servo motor to control low power and to control the consumption state of the rechargeable battery and the abnormality of the device to the external control device through the wireless communication module while checking the consumption state of the rechargeable battery and the abnormality of the device A power management IC (PMIC) unit 700,

And a reduction gear box unit 800 located at one side of the upper end of the rotary shaft of the RC servo motor to decelerate the rotational force RPM of the RC servo motor and increase the torque to output the final output gear to the final output gear.

As described above, in the present invention, the high heat generated from the RC servomotor can be effectively radiated through the heat-radiating coolant member around the inner wall of the housing space for the RC servo motor, and the heat radiation effect can be improved by 80% This makes it possible to reduce the failure rate of the equipment to less than 40%. The state of the checked rechargeable battery and the overload state of the RC servo motor can be notified to the control device through the wireless communication module, It is possible to check the state of the motor in real time and to prevent breakage due to the collision of the RC device in advance and to output the output voltage in proportional proportional to the angle at which the final output gear is driven by controlling the proportional integral differential (PID) , The RC servo motor can be precisely controlled, and the digital servomotor can be used to control the change of the control structure without changing the hardware (circuit) And it is possible to improve the power consumption to 60% compared to the conventional one because the circuit parts are small.

1 is a block diagram showing components of a smart servo for a remote control (RC) according to the present invention;
FIG. 2 is a perspective view showing components of a smart servo for a remote control (RC) formed by a case body 100a according to the present invention,
FIG. 3 is an exploded perspective view showing internal components of a smart servo for a remote control (RC) formed by a case body 100a according to the present invention,
FIG. 4 is a perspective view of a refrigerator according to an embodiment of the present invention. Referring to FIG. 4, an RC servo motor, a servomotor driver unit, and a PMIC unit are custom- ) Are formed in a thread-like shape,
5 is a block diagram showing the components of the servo motor driver unit according to the present invention.
6 is a block diagram showing components of a PMIC (Power Management IC) unit according to the present invention,
7 is a block diagram illustrating components of a step-down DC-DC converter 710 in accordance with the present invention.
8 is a block diagram illustrating components of a buck converter in accordance with the present invention;
9 is a block diagram illustrating the components of a step-up DC-DC converter in accordance with the present invention;
10 is a circuit diagram showing components of a step-down DC-DC converter 710 and a step-up DC-DC converter 720 according to the present invention,
11 is a circuit diagram showing components of the DT-CMOS unit 730 according to the present invention,
FIG. 12 is a perspective view showing components of a smart servo for a remote control (RC) formed with a case body 100b of a single type according to the present invention,
13 is an exploded perspective view showing internal components of a smart servo for a remote control (RC) formed with a case body 100b of a single type according to the present invention,
FIG. 14 is a perspective view of a reduction gear box according to an embodiment of the present invention in which a transparent acrylic band edge portion is formed along a side surface of a support frame body of the reduction gear box portion according to the present invention, and a plurality of RGB LED modules are formed in an inner space of the transparent acrylic band edge portion ,
FIG. 15 is a schematic view of a smart servo for a remote control (RC) in which a case body according to the present invention is formed of a twin-type cradle body 100a to emit blue light on a transparent acrylic band- Lt; RTI ID = 0.0 > a < / RTI > steady state,
16 is a schematic view showing a state in which a smart servo for a remote control (RC), in which a case body according to the present invention is formed of a twin-type cradle body 100a, emits red (red) light on a transparent acrylic band- Lt; RTI ID = 0.0 > overload < / RTI >
17 is a view showing an embodiment in which a smart servo for a remote control according to the present invention is mounted on a model helicopter and transmits a consumption state of a rechargeable battery and an abnormality of a rechargeable battery to an external control device via a wireless communication module.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing components of a smart servo 1 for a remote control (RC) according to the present invention, which includes a case body 100, a wire connection connector unit 200, an RC servo A motor 300, a potentiometer 400, a servo motor driver 500, an overload detection sensor 600, a power management IC (PMIC) 700, and a reduction gear box 800.

First, a case body 100 according to the present invention will be described.

The case body 100 has a square block structure, and protects and supports each device from external pressure.

This is configured by selecting either the twin-type mounting body 100a or the single-type mounting body 100b.

First, a twin-type mounting body 100a according to the present invention will be described.

As shown in FIG. 2, the twin-type cradle body 100a has a twin structure of "C" -shaped mounting holes on the left and right sides of the upper and lower outer surfaces, And is formed in a flat shape without a mounting hole on one side, and protects and supports each device from external pressure.

Here, peripherals are model aircraft, model ships, model helicopters, internal electronic components of military small search helicopters, support frames, and support frames.

As shown in FIG. 3, the first upper case 110, the first break case 120, and the first lower case 130 are formed.

The first upper case 110 is positioned at the upper end of the first stop case to protect and support the reduction gear box portion from external pressure.

A first protruding groove 112 for projecting the head portion of the final output gear to the outside on one side of the upper surface, And a first bolt insertion groove 113 for bolt-fastening the first stop case along the periphery of the upper surface is formed.

The first stop case 120 is located at the upper end of the first lower case, and a plurality of storage spaces are formed therein so that the RC servo motor, the potentiometer, the servo motor driver unit, and the PMIC unit can be customized.

3, a first support plate 120a for supporting the reduction gear box part is formed on one side of the upper surface, a first support plate 120a for accommodating the RC server motor in a customized manner, A housing space 121 for a servo motor is formed, and a servomotor driver part and a PMIC (Power Management IC) -type twin type PCB substrate are accommodated in a first space for a first RC servo motor, A portion 122 is formed.

As shown in FIG. 4, the heat-radiating coolant member 120a is formed in a threaded shape on the inner wall 121a of the first RC servo motor housing space 121 in contact with the RC servo motor.

Here, the heat-dissipating coolant member 120a is formed by forming an engraved surface in the form of a thread around the inner wall, coating the heat-radiating coolant on the engraved engraved surface, and then sealing and fixing the rubber member to the applied heat-

At this time, since the heat-radiating coating layer is formed around the inner wall where the RC servo motor is contacted, it is possible to directly cool the high heat generated in the RC servo motor, thereby improving the heat radiation effect by 80% The incidence can be lowered to 40% or less.

The heat dissipation coating layer may contain 60 to 80% by weight of an ethyl cellulose (EC) resin or a silicone resin,

5 to 10 wt% of diethylene glycol monobutyl ether,

10 to 30 wt% of a carbonaceous material of carbon black, coke and graphite powder having particle sizes of 13 to 18 탆 at a temperature of 45 to 55 캜 for 1 to 3 hours by magnetic bridging is applied to the inner wall by brushing Followed by drying in a drying oven at 140 to 160 ° C for 20 to 40 minutes.

At this time, in order to maintain a stable thermal emissivity, the thickness of the coating layer is kept in a range of 5 to 20 mu m.

When the amount of the binder used is less than 60 wt%, it is difficult to form a uniform coating layer. When the amount of the binder exceeds 80 wt%, the coating operation may not be performed smoothly. Therefore, the amount of the binder used is limited within a range of 60 to 80 wt% .

When the amount of the carbon material is less than 10 wt%, the heat dissipation property is deteriorated. When the amount of the carbon material is more than 30 wt%, the physical properties of the coating layer may be deteriorated. Therefore, the amount of the carbon material used is in the range of 10 to 30 wt% .

More specifically, the heat-radiating coating layer contains 75 wt% of an ethyl cellulose (EC) resin,

5 wt% of diethylene glycol monobutyl ether,

20 wt% of carbon black having a particle size of 13 to 18 탆 was subjected to magnetic cross-linking at 50 캜 for 2 hours to form a coating liquid on the inner wall by brushing, followed by drying in a drying oven at 150 캜 for 30 minutes Thereby forming a heat radiation coating layer.

The first lower case 130 is located at the lower end of the first stop case, and protects and supports the bottom of the RC servo motor, the PMIC unit, and the servo motor driver unit from external pressure.

And a plurality of first bolt insertion grooves 131 are formed around the rim to be bolted while supporting the wire connecting connector in the lower end direction.

A reduction gear box portion 800 is included between the first upper case 110 and the first stop case 120.

Second, a single type cradling body 100b according to the present invention will be described.

As shown in FIG. 12, the single-type cradling body 100b is formed in a flat shape having no fixing holes on the left and right sides of the outer surface of the upper end portion, and a straight fixing hole is formed on one side of the outer surface of the middle portion in a vertical direction , And is formed in a non-patterned shape having no mounting hole on one side of the outer surface of the lower end portion, thereby protecting and supporting each device from external pressure.

As shown in FIG. 13, this is constituted by a second upper case 140, a second interrupted case 150, and a second lower case 160.

The second upper case (140) is located at the upper end of the second stop case, and serves to protect and support the reduction gear box portion from external pressure.

A second projecting groove 141 for projecting the head portion of the final output gear to the outside and a second bolt insertion groove 141 for bolt-fastening the second stop case along the upper surface circumference, (142) is formed.

The second stop case 150 is located at the upper end of the second lower case, and a plurality of storage spaces are formed therein so that the RC servo motor, the potentiometer, the servo motor driver unit, and the PMIC unit are customized.

13, a second support plate 150a for supporting the reduction gear box part is formed on one side of the upper surface, and a second RC 150 for accommodating the RC server motor in a customized manner is formed on the inner side of the second support plate 150a. A housing space 151 for a servomotor is formed and a servomotor driver part and a PMIC (Power Management IC) -type twin-type PCB substrate are housed in a housing space for the RC servo motor. 152 are formed on the outer surface, and a straight type fixing hole 153 is formed in the vertical direction on one side of the outer surface.

In this case, since the one-piece type fixing hole 153 is formed independently on one side of the outer surface of the second stop case in the vertical direction, the mold volume and the mold size can be reduced as compared with the twin type mounting body, There is no need to provide a separate support frame when installing in the interior space of the model airplane, model boat, model helicopter, and military small search helicopter, and it is easy to install and assemble because it can be screwed in 1: 1 customized form .

The heat-radiating coolant member 120a is formed in a threaded shape on the inner wall 151a of the housing space 151 for the second RC servo motor in contact with the RC servo motor.

A reduction gear box portion 800 is included between the second upper case 140 and the second stop case 150.

The second lower case 160 is located at the lower end of the second stop case, and protects and supports the bottom of the RC servo motor, the PMIC unit, and the servo motor driver unit from external pressure.

This is formed in a rectangular shape and a plurality of second bolt insertion grooves 161 are formed along the periphery so as to be bolted while supporting the wire connection connector portion in the lower end direction.

As described above, the case body 100 according to the present invention in which any one of the twin-type cradle body 100a and the single-type cradle body 100b is selected is made of a magnesium alloy material that is lightweight and has excellent heat dissipation and durability.

Engineering magnesium is rarely used in its pure form. In general, aluminum, zinc, manganese, zirconium, silver, rare earth metals and the like are added to obtain strength and physical properties required as a structural material.

One of the biggest advantages of magnesium alloys is light weight. The specific gravity of magnesium alloy currently used is 1.79 ~ 1.81, which is about 30% lighter than aluminum alloy and has excellent mechanical strength. In addition, magnesium alloys have heat dissipation properties.

In the present invention, a magnesium alloy is used which improves the mechanical strength characteristics while improving the light weight characteristics.

The magnesium alloy has a basic magnesium alloy billet 97.5 having a composition of 94% of Mg, 5.32% of Al, 0.008% of Cu, 0.004% of Fe, 0.4% of Mn, 0.08% of Si and 0.188% of Zn and a density of 1.8 g / after which one or both of Sn or Zn of the ~ 99.5wt% and charged with 0.5 ~ 2.5wt% dissolved by the molten metal to prevent oxidation during Air + SF ₆ Gas,

In order to reduce the temperature deviation with the molten metal, preheat to 200 ~ 250 ℃ and to prevent fusion of the molten magnesium and the mold, it is poured into plate metal mold with boron nitride (BN) .

If the content of Sn or Zn is less than 0.5 wt%, it is difficult to expect improvement in durability such as tensile strength. When the content of Sn or Zn exceeds 2.5 wt%, there is no significant change in improvement in durability, Or Zn is 0.5 to 2.5 wt% based on the basic magnesium alloy so as to improve the durability such as tensile strength while maintaining the lightweight property of the basic magnesium alloy.

More specifically, a magnesium alloy is produced at a ratio of 97.5 wt% of a basic magnesium alloy billet, 1.0 wt% of Sn and 1.5 wt% of Zn.

The magnesium alloy may further be subjected to surface treatment by chromic acid method at room temperature for 50 to 70 seconds using Na ₂ Cr ₂ O ₇ + HNO ₃ in order to prevent corrosion.

Next, the wire connection connector unit 200 according to the present invention will be described.

The wire connection connector unit 200 is formed on one side of the lower portion of the case body and is connected to the rechargeable battery to receive power and supply power to each device and receives a command signal from the wireless communication module and transmits the command signal to the PMIC unit .

It consists of a three wire structure.

In the three-wire structure, a black wire is connected to GND, a red wire is connected to VCC, and a PWM signal is applied to the yellow wire.

The wire connection connector unit 200 includes a current detection sensor unit 210 positioned between a (+) terminal and a (-) terminal connected to the rechargeable battery and sensing a current flowing into the device and transmitting the current to the PMIC unit .

Next, the RC servo motor 300 according to the present invention will be described.

The RC servo motor 300 is inserted into the case body and generates a rotational force in accordance with a driving signal of the servo motor driving driver unit in a state in which the rotational angle of the output shaft is received from the potentiometer to transmit the rotational force to the final output gear .

It has a built-in DC motor and a potentiometer on one side of the output shaft.

The RC servomotor 300 is used in a place where it needs to rotate about 90 degrees to the left, 90 degrees to the right, and 180 degrees to the left, without rotating 360 degrees.

Because of this characteristic, the RC servo motor is used to control the steering wheel of the front wheel of the RC car or the rotor and the rear wing of the RC helicopter among RC devices.

The torque of the RC servo motor is configured to be changed according to a torque value that the DC motor included in the RC servo motor can output.

The RC servomotor is a motor that adjusts the angle by the width of a pulse, and receives rotation information through a potentiometer formed on one side of the output shaft.

The pulse width represents a value between about 0.7 msec and 2.5 msec, and the corresponding angle varies from 0 to 180 degrees. Therefore, frequencies below 400 Hz are used.

Then, the pulse width of the PWM signal having a carrier cycle of 10 ms to 20 ms is adjusted to control the angle.

The RC servomotor operates with a turning radius of 180 degrees with an operating range of +90 to -90 degrees, has a built-in speed reducer, 3.0 Kg / cm at an output torque of 4.8 V, 6.0 V is 3.5 Kg / cm at the power source.

Next, the potentiometer 400 according to the present invention will be described.

The potentiometer 400 is located at one side of the output shaft of the RC servomotor and serves to vary the resistance while rotating with the RC server motor and to transmit the rotational position of the output shaft to the PMIC unit with the measured voltage.

Next, the servo motor driver unit 500 according to the present invention will be described.

The servo motor driver unit 500 is located at one side of the RC servo motor and controls the driving of the RC servo motor under the control of the PMIC unit.

As shown in FIG. 5, this includes a detection sensor 510, an A / D converter 520, and a D / A converter 530.

The detection sensor 510 detects the output of the RC servomotor and transmits it to the A / D converter.

The A / D converter 520 converts the output value of the RC servo motor detected by the detection sensor into a digital signal and transmits the digital signal to the PMIC unit.

The D / A converter 530 receives the drive command signal of the RC servo motor from the PMIC unit, converts the received drive command signal into an analog signal, and transmits the analog signal to the RC server motor.

The servo motor driver unit 500 including the detection sensor, the A / D converter, and the D / A converter can construct the digital servo driver. The control structure can be changed without changing the hardware (circuit) It can compensate the disturbance occurring on the hardware or machine mechanism. It can reduce the manufacturing cost, the driver size can be reduced, and the parts of the circuit are small, so that the power consumption is improved by 60% .

Next, the overload detection sensor unit 600 according to the present invention will be described.

The overload detection sensor unit 600 is located at one side of the RC servo motor and detects the overload state of the RC servo motor and transmits the detected overload state to the PMIC unit.

It is configured to connect a sensing resistor to one side of the input current and the output current, and to switch it through the transistor and transmit it to the PMIC part.

Next, the PMIC unit 700 according to the present invention will be described.

The PMIC unit 700 is connected to the RC servo motor and the servo motor driver unit at a lower side of the servo motor driver unit and controls the high output voltage and the low output voltage required by the RC unit in one chip to generate a PWM pulse width Modulation) method, reducing the conduction loss of the RC servomotor to reduce power consumption, checking the consumption state of the rechargeable battery and the abnormality of the device, And transmits the abnormality.

6, a step-down DC-DC converter 710, a step-up DC-DC converter 720, a DT-CMOS unit 730, a wireless data transceiver 740, (750).

First, it is configured as a step-down DC-DC converter 710 according to the present invention.

The step-down DC-DC converter 710 supplies power to each device in the normal operation mode, and maintains the power conversion efficiency constant within the reference set value range in accordance with the load change of the RC thermomotor in the standby mode It plays a role.

As shown in FIG. 7, this is constituted by a buck converter 711 and an LDO regulator 712.

[Buck converter]

The buck converter 711 serves to supply power in a normal operation mode.

This is because the error produced by comparing the output voltage with the reference voltage Vref is amplified by a first error amplifier (Error Amp), and the amplified voltage is compared with a saw tooth wave in a comparator, Generate a square wave pulse to drive the RC servo motor drive switch to stabilize the output voltage.

As shown in FIG. 8, this is constituted by a first error amplifier 711a and a first reference voltage generating circuit portion 711b.

The first error amplifier 711a compares the output voltage of the PMIC part with 555mV of the reference voltage generation circuit part, and amplifies the error by an amount corresponding to the error.

This is configured in folded-cascode fashion to have a high gain and the output stage is composed of a common source since the resistor must be driven.

The first reference voltage generating circuit part 711b generates a reference voltage irrespective of a change in power voltage and temperature, and is configured using a band-gap reference circuit.

The first reference voltage generating circuit part sets a minimum range of the output voltage in the PMIC part.

Therefore, in order to have a wide output range, it is constituted by a first low-voltage (555 mV) reference voltage generating circuit portion rather than a first reference voltage generating circuit portion that outputs 1.2V.

[ LDO regulator section ]

The LDO regulator 712 converts the RC servomotor into a standby mode in which the RC servomotor operates at a low current during landing and takeoff, and maintains the efficiency constantly without changing the load according to the load change.

PWM-mode SMPSs have high power conversion efficiency at high output currents, but efficiency drops sharply when the output current is low.

The RC servomotor consumes less current in standby mode.

The LDO regulator section has characteristics that the efficiency is not largely changed according to the load change.

As shown in FIG. 10, the step-down DC-DC converter according to the present invention including the buck converter 711 and the LDO regulator 712 operates as an SMPS (buck converter) in the normal mode, , The two switches are cut off and the LDO is activated.

Here, the normal mode and the standby mode are operated under the control of the PMIC unit.

Although the buck converter has an efficiency of about 28% at a load current of 1 mA, the LDO regulator portion according to the present patent has an efficiency of about 60%, so that the RC servo motor is configured to maintain efficiency above a certain level even in the standby mode.

Second, the step-up DC-DC converter 720 according to the present invention will be described.

The step-up DC-DC converter 720 serves to drive the output voltage of the RC servo motor.

It consists of a boost converter.

10, an error produced by comparing the output voltage with the reference voltage Vref is amplified by an error amplifier (Error Amp), and the amplified voltage is converted into a saw tooth wave by a comparator, To generate a square wave pulse corresponding to the error and drives the switch for driving the RC servo motor to stabilize the output voltage.

As shown in Fig. 9, this is constituted by a second error amplifier 721a and a second reference voltage generating circuit portion 721b.

The second error amplifier 721a compares the output voltage of the PMIC section with 555mV of the second reference voltage generation circuit section and amplifies the difference by the error.

This is configured in folded-cascode fashion to have a high gain and the output stage is composed of a common source since the resistor must be driven.

The second reference voltage generating circuit portion 721b generates a reference voltage irrespective of a change in power supply voltage and temperature, and is configured using a band-gap reference circuit.

The second reference voltage generating circuit part sets a minimum range of the output voltage in the PMIC part.

Therefore, in order to have a wide output range, it is constituted by a second low-voltage (555 mV) reference voltage generating circuit portion which is not a second reference voltage generating circuit portion which outputs an existing 1.2V.

The step-up DC-DC converter uses the reference voltage generator circuit (Bandgap Reference Voltage Generator) shared by the buck converter in the PWM control circuit, thereby reducing the area through the package and reducing the area by 10 to 15% By using DT-CMOS with low on-resistance as a switching device, power consumption can be lowered through the sharing of PWM control circuit, and efficiency of 92.1% and 95% can be increased at 100mA output current.

Third, the DT-CMOS unit 730 according to the present invention will be described.

The DT-CMOS unit 730 outputs a low threshold voltage when a logic transition occurs, drives a high threshold voltage when the RC servo motor is in a standby state, accelerates an operation speed, and consumes power in a standby state It plays a role.

This prevents the conduction loss due to the ON resistance of the switch from increasing as the output current increases and reduces the threshold voltage as the supply voltage is reduced to realize low power without loss of circuit performance.

Here, the threshold voltage is limited by the amount of leakage current in the standby state.

11, when the switch is turned on, the body voltage of the switch MOS is controlled by the diode connection nMOS to lower the threshold voltage. When the switch is turned off, the body of the pMOS and the nMOS body voltage to the supply voltage and ground to raise the threshold voltage.

The DT-CMOS part has a lower on-resistance than a conventional CMOS switch due to a low threshold voltage when the switch is turned on.

Further, the size of the diode connection MOS is adjusted to minimize leakage current to the body even at a high power supply voltage, thereby overcoming the limitation of the power supply voltage due to the leakage current.

Fourth, the wireless data transmitting / receiving unit 740 according to the present invention will be described.

The wireless data transmitting and receiving unit 740 controls the external control device to transmit the consumed state of the rechargeable battery and the abnormality of the device through the wireless communication module.

It consists of WiFi communication module.

In this way, the PMIC part composed of the step-down DC-DC converter, the step-up DC-DC converter, the DT- CMOS part, and the wireless data transmission / reception part outputs the control signal PWM suitable for the RC servo motor, -90 degrees and 180 degrees), and the signal line of the wire connection connector is composed of PWM, Vcc, and Gnd, and the power source is constituted by an independent power supply of 5V.

The control signal of the PMIC unit is supplied at a period of 0.7 to 2.3 msec, and a program for generating a pulse of about 100 μsec from a pulse width of 0.7 msec to 2.3 msec is set. Then, when a pulse is applied, Is stopped to move at a predetermined angle, and has a center angle at 1.5 msec, moves at an angle of 0.7 msec to -90 degrees, and moves at an angle of 2.3 msec to + 90 degrees.

Fifth, the overload detection LED display unit 750 according to the present invention will be described.

The overload detection LED display unit 750 compares the overload state of the RC servomotor transmitted from the overload detection sensor unit with the reference set value. If the overloaded state is equal to or greater than the reference set value, the overloaded LED display unit 750 displays a red light on the RGB LED module The control unit controls the RC servo motor to indicate that the RC servo motor is in the normal driving state by emitting a blue light to the RGB LED module side if the RC servo motor is in the overload state.

It consists of an OP amp, sensing resistor, diode, and FET switching part.

The reference set value is set to an overload detection current of 9A to 11A.

That is, as shown in FIG. 15, when the output current of the RC servo motor is 9 A or less, it is set to be in a normal driving state, and blue (blue) light is emitted toward the RGB LED module so that the RC servo motor is displayed in a normal state 16, when the output current of the RC servomotor is 9A to 11A, it is set to be in an overload state so that the red (red) light is emitted toward the RGB module and the RC servo motor is overloaded .

Next, the reduction gear box portion 800 according to the present invention will be described.

The reduction gear box portion 800 is located on one side of the upper end of the rotary shaft of the RC servo motor to reduce the rotational force RPM of the RC servo motor and increase the torque to output the final output gear.

It has an operating range of +90 to -90 degrees (180 degrees), an operating speed of 0.17 seconds / 60 degrees at 6.0 V, 0.14 seconds / 60 degrees at 7.4 V, and an output torque of 24.0 kg at 6.0 V. cm, and 30.0 kg.cm at 7.4V.

The reduction gear box portion 800 includes a support frame body 810, a pinion gear 820, a first spur gear 830, a second spur gear 840, a third spur gear 850, 860).

The supporting frame main body 810 has a rectangular frame structure and protects and supports each device from external pressure in the lower end direction.

14, a transparent acrylic band edge portion 811 is formed along the side surface, and a plurality of RGB LED modules 811a are formed in the inner space of the transparent acrylic band edge portion.

Here, the RGB LED module 811a selectively emits blue (blue) light or red (red) light according to an overload detection LED indicator control signal of a PMIC (Power Management IC)

The pinion gear 820 is positioned at the upper end of the rotation shaft and serves to decelerate the rotational force RPM and increase the torque.

The first spur gear 830 has a layered structure of an upper end and a lower end and is engaged with a pinion gear at an upper end to reduce a rotational force RPM.

The second spur gear 840 is formed on the rotation axis coaxial with the pinion gear and transmits the rotation force RPM of the RC servo motor while engaging with the third spur gear to decelerate the rotation force RPM and increase the torque It plays a role.

The third spur gear 850 is formed on the rotation axis coaxial with the second spur gear and is formed in a layered structure of an upper end and a lower end, and a final output gear is engaged at a lower end to transmit a rotational force to a final output gear do.

The final output gear 860 is connected to the third spur gear and receives a rotational force from the third spur gear to output a rotational force to the rotational member of the external device.

Hereinafter, a specific operation procedure of the smart servo for remote control according to the present invention will be described.

First, after the RC server motor is housed in the housing space for the RC servo motor formed inside the case body, the servo motor driver unit is connected to the RC server motor.

Next, the power supply is connected to the rechargeable battery through the wire connection connector unit 200 to supply power to each device, and receives a command signal from the wireless communication module and transfers the command signal to the PMIC unit.

Next, under the control of the PMIC part, the high output voltage and the low output voltage required by the RC device are controlled by a single chip and output by PWM (Pulse Width Modulation) method.

Next, the drive signal of the RC servo motor is turned on via the servo motor driver section.

Next, the RC servomotor is driven in accordance with the ON signal of the servo motor driver. When the rotation angle of the output shaft is received from the potentiometer, a torque is generated in response to the drive signal of the servomotor driver section, .

Next, the potentiometer changes the resistance while rotating with the RC server motor, and transfers the rotation position of the output shaft to the PMIC part with the measured voltage.

Next, decelerates the rotational force (RPM) of the RC servo motor in the reduction gear box part, increases the torque, and outputs it to the final output gear.

At this time, the propeller of the RC device connected to the final output gear is rotated.

Next, the overload detection sensor detects the overload condition of the RC servomotor and transfers it to the PMIC part.

Finally, PMIC (Power Management IC) part controls low power by reducing conduction loss through DT-CMOS device with low on-resistance. So that the consumed state of the rechargeable battery and the abnormality of the apparatus are transmitted.

That is, as shown in FIG. 17, the smart servo for remote control according to the present invention is seated on the model helicopter, and transmits the consumption state of the rechargeable battery and the abnormality of the device to the external control device through the wireless communication module.

1: Smart Servo for remote control (RC, Remote Control)
100: Case body 200: Wire connection connector part
300: RC servo motor 400: Potentiometer
500: Servo motor driver unit 600: Overload sensor unit
700: PMIC (Power Management IC) 800: Deceleration gear box part

Claims (8)

A case body 100 having a square block structure for protecting and supporting each device from external pressure,
A wire connection connector unit 200 formed at a lower end of the case body and connected to the rechargeable battery to supply power to each device, receive command signals from the wireless communication module and transmit the command signals to the PMIC unit,
An RC servo motor (300) inserted in the case body and generating a rotational force in response to a driving signal of the servo motor driving driver section and receiving a rotational force from the potentiometer to transmit the rotational force to the final output gear;
A potentiometer 400 located at one side of the output shaft of the RC servo motor for varying the resistance while rotating with the RC server motor and transmitting the rotational position of the output shaft to the PMIC unit with the measured voltage,
A servomotor driver section 500 located at one side of the RC servo motor for controlling the driving of the RC servo motor under the control of the PMIC section,
An overload detection sensor unit 600 positioned at one side of the RC servo motor for sensing an overload state of the RC servo motor and transmitting the detected overload state to the PMIC unit,
It is located at the lower side of the servo motor driver part and connected with RC servo motor and servo motor driver part. It controls high output voltage and low output voltage required by RC device by one chip and outputs it by PWM (Pulse Width Modulation) Controls to reduce the conduction loss of the RC servo motor to control low power and to control the consumption state of the rechargeable battery and the abnormality of the device to the external control device through the wireless communication module while checking the consumption state of the rechargeable battery and the abnormality of the device A power management IC (PMIC) unit 700,
And a reduction gear box part (800) located at one side of the upper end of the rotation axis of the RC servo motor for reducing the rotational force (RPM) of the RC servo motor and increasing the torque to output to the final output gear. , Remote Control).
[2] The apparatus of claim 1, wherein the case body (100)
The radiator coolant member 120a is formed in a threaded shape around the inner wall of the RC servomotor housing space in which the RC servo motor, the servo motor driver unit, and the PMIC unit are accommodated in a customized manner in contact with the RC servo motor. Smart Servo for remote control.
The refrigeration system of claim 2, wherein the heat-dissipating coolant member (120a)
And a rubber member is packed and fixed on an upper layer of the applied heat-dissipating coolant after applying a heat-radiating refrigerant to the engraved engraving of the thread-like shape.
The connector according to claim 1, wherein the wire connection connector (200)
And a current sensing part (210) located between the (+) terminal and the (-) terminal connected to the rechargeable battery, for sensing the current flowing into the device and transmitting the sensed current to the PMIC part. Smart Servo for.
The apparatus of claim 1, wherein the PMIC (Power Management IC)
A step-down DC-DC converter 710 that supplies power to each device in the normal operation mode and maintains the power conversion efficiency constantly within the reference set value range in accordance with the load change of the RC thermomotor in the standby mode,
A step-up DC-DC converter 720 for driving the output voltage of the RC servo motor,
A DT-CMOS unit 730 for outputting a low threshold voltage at the time of logic transition and a high threshold voltage at the time of logic transition to reduce the standby power consumption while operating the RC servo motor, ,
And a wireless data transmission / reception unit (740) for controlling the external control device to transmit the consumption state of the rechargeable battery and the device abnormality via the wireless communication module.
The apparatus of claim 1, wherein the PMIC (Power Management IC)
When the overload status of the RC servo motor transmitted from the overload detection sensor part is compared with the reference set value, if the reference value is higher than the reference setting value, the red LED is emitted on the RGB LED module formed along the circumference of the discontinuous case, And an overload detection LED display unit 750 which emits a blue light to the RGB LED module and controls the RC servo motor to indicate that the RC servo motor is currently in a normal driving state, Smart Servo for Control.
[2] The apparatus of claim 1, wherein the case body (100)
Wherein the magnesium alloy has a composition of 94% of Mg, 5.32% of Al, 0.008% of Cu, 0.004% of Fe, 0.4% of Mn, 0.08% of Si and 0.188% of Zn and has a density of 1.8 g / Cm < 3 >, Sn or Zn is added in an amount of 0.5 to 2.5 wt% to prevent oxidation during the melting with Air + SF ₆ gas. Then, Wherein the preform is preheated to 250 DEG C to prevent fusion of the molten magnesium and the mold, and is manufactured by pouring gravity casting into a plate metal mold coated with boron nitride (BN) .
[2] The apparatus of claim 1, wherein the case body (100)
And a plurality of protrusions are formed on the outer surface of the outer surface of the intermediate portion in the vertical direction and the protrusions are formed on the outer surface of the outer surface of the lower end in a non- And a single type cradle body (100b) for protecting and supporting each device from external pressure.

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