KR20180109210A - Driver for Electronic Device of Vehicle - Google Patents

Abstract

The present invention relates to a driving device for an electronic device for a vehicle. According to the present invention, provided is a driving device for an electronic device for a vehicle, which includes: a power supply unit that receives power from a battery and generates a low power driving voltage; a boost converter for receiving power from the battery to generate a driving power for driving the vehicle electronic device; a sensing unit for sensing at least one of current or voltage information of the boost converter; a pulse width modulation (PWM) unit for generating a PWM signal for driving the boost converter; and a controller for generating a control signal for controlling the PWM unit based on information sensed by the sensing unit.

Description

Technical Field [0001] The present invention relates to a driver for an electronic device,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

Recent vehicles have made significant advances in performance and appearance, and are evolving into next-generation vehicles that use increasingly diverse fuels. Along with the evolution of such vehicles, electronic devices that are applied to vehicles have also been diversified.

Such electronic devices are generally operated by a battery mounted on a vehicle.

In order to operate the electronic devices mounted on the vehicle, a driving device for operating the electronic devices using the electric power supplied from the battery may be required.

An object of the present invention is to provide a driving apparatus for a vehicle electronic apparatus for stably operating electronic apparatuses mounted in a vehicle.

A driving apparatus for a vehicle electronic device according to the present invention includes a power supply unit that receives power from a battery and generates a low-power driving voltage, a boost converter that generates driving power for driving a vehicle electronic device A sensing unit for sensing at least one of current or voltage information of the boost converter, a PWM unit (Pulse Width Modulation Part) for generating a PWM signal (Pulse Width Modulation Signal) for driving the boost converter, And a controller for generating a control signal for controlling the PWM unit on the basis of the information sensed by the sensing unit.

The sensing unit may include a voltage sensor for sensing the output voltage of the boost converter and a current sensor for sensing the current of the boost converter.

The boost converter includes a switching part disposed between a positive terminal and a negative terminal of the battery and a transformer disposed between the switching part and the plus terminal of the battery. Wherein the primary coil of the transformer is located between the switching unit and the positive terminal of the battery, the switching unit includes a MOSFET, and the PWM signal generated by the PWM unit is supplied to a gate terminal Lt; / RTI >

The boost converter further includes a first capacitor disposed in parallel with the MOSFET, a second capacitor connected in parallel to the secondary coil of the transformer and arranged in series with the first capacitor, A third capacitor disposed in parallel with the first capacitor and a first node between the third capacitor and the second capacitor and a first node between the first capacitor and the one end of the secondary coil of the transformer, And a fourth capacitor (Fourth Capacitor).

The boost converter further includes a first diode disposed between the fourth capacitor and the first node and a second node between the output terminal of the secondary coil of the transformer and the fourth capacitor, And a second diode disposed between the first node and the first node in parallel with the fourth capacitor and the first diode, and a cathode of the first diode is connected to the fourth capacitor, The anode of the first diode may face the first node, the cathode of the second diode may face the first node, and the anode of the second diode may face the second node.

Also, the voltage across the third capacitor may correspond to the output voltage of the boost converter.

The current sensing unit may sense a current flowing between a positive terminal of the battery and a primary coil of the transformer.

When the current flowing between the positive terminal of the battery and the primary coil of the transformer is greater than a predetermined reference current, the control unit outputs a control signal for turning the MOSFET off, Can be provided.

The control unit may provide a control signal to the PWM unit to turn off the MOSFET when the output voltage of the boost converter is greater than a preset reference voltage.

The driving apparatus for a vehicle electronic device according to the present invention can stably convert the electric power provided by the battery and supply the electric power to the electronic apparatus to stably drive the electronic apparatus.

1 is a diagram for explaining a schematic configuration of a vehicle.
Fig. 2 is a diagram for explaining the configuration of the drive device 20. Fig.
3 is a view for explaining a power supply unit.
4 is a diagram for explaining a PWM unit.
5 to 6 are diagrams for explaining the boost converter.
7 to 8 are diagrams for explaining the voltage sensing unit.
9 is a diagram for explaining the current sensing unit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a driving apparatus for a vehicle electronic device according to the present invention will be described in detail with reference to the accompanying drawings.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood that the present invention is not intended to be limited to the specific embodiments but includes all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In describing the present invention, the terms first, second, etc. may be used to describe various components, but the components may not be limited by the terms. The terms may only be used for the purpose of distinguishing one element from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The term " and / or " may include any combination of a plurality of related listed items or any of a plurality of related listed items.

When an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may be present in between Can be understood. On the other hand, when it is mentioned that an element is " directly connected " or " directly connected " to another element, it can be understood that no other element exists in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions may include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used interchangeably to designate one or more of the features, numbers, steps, operations, elements, components, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries can be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are, unless expressly defined in the present application, interpreted in an ideal or overly formal sense .

In addition, the following embodiments are provided to explain more fully to the average person skilled in the art. The shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

Hereinafter, 'A and / or B' can be interpreted as 'at least one of A and B.'

1 is a view for explaining a schematic configuration of a vehicle according to the present invention.

Referring to FIG. 1, a vehicle 40 according to the present invention may include a battery 10, a driving device 20, and an electronic device 30. [

The battery 10 can provide power necessary for the operation of the vehicle 40 and the operation of the electronic device 30. [ Hereinafter, it is assumed that the battery 10 supplies DC 24 V, but the present invention is not limited thereto.

Examples of the electronic device 30 include an air conditioner and a motor. Hereinafter, for convenience of explanation, the electronic device 30 will be described by taking an air conditioner as an example.

The driving device 20 can drive the electronic device 30 using the electric power supplied from the battery 10. [ More specifically, the drive unit 20 converts the DC voltage supplied from the battery 10 to a DC voltage necessary for driving the electronic equipment 30 and supplies the DC voltage to the electronic equipment 30 to drive the electronic equipment 30 . The driving device 20 may be referred to as a DC-DC converter.

This driving device 20 will be described in more detail below.

Fig. 2 is a diagram for explaining the configuration of the drive device 20. Fig. In the following, description of the contents described above may be omitted.

2, the driving apparatus 20 according to the present invention includes a power supply unit 500, a boost converter 300, a sensing unit 400, a PWM unit (Pulse Width Modulation Part) 200, and a controller , 100).

In Fig. 2, the solid line indicates the power path, and the dashed line indicates the drive signal or the control signal path.

The power supply unit 500 may receive power from the battery 10 and generate a low power driving voltage. For example, the power supply unit 500 can generate a low-power driving voltage of +5 V, -5 V, +15 V, -15 V, or the like at 24 VDC supplied from the battery 10.

The low-power driving voltage can be used for driving the sensor, the control unit 100, the PWM unit 200, and the like.

The boost converter 300 may generate driving power for driving the vehicle electronic device 30 by receiving power from the battery 10. [ For example, the boost converter 300 can convert DC24V supplied by the battery 10 to DC 110V. In addition, the DC 110 V power converted and output by the boost converter 300 can be supplied to the electronic device 30 such as a compressor of an air conditioner.

The sensing unit 400 may sense at least one of current or voltage information of the boost converter 300. In addition, the sensing unit 400 may provide at least one of the sensed current or voltage information to the control unit 100.

The sensing unit 400 includes a voltage sensor 410 for sensing the output voltage of the boost converter 300 and a current sensor 420 for sensing the current of the boost converter 300 .

The PWM unit 200 may generate a PWM signal (Pulse Width Modulation Signal) for driving the boost converter 300.

The control unit 100 can control the overall operation of the driving device 20. [ For example, the control unit 100 may generate a control signal for controlling the PWM unit 200 based on the information sensed by the sensing unit 400.

The control signal generated by the control unit 100 may be supplied to the PWM unit 200 to drive the PWM unit 200.

The operation of the driving device 20 will be briefly described below.

When the battery 10 supplies DC power, the power supply unit 500 may generate a low power driving voltage capable of driving the control unit 100 and the sensing unit 400. Accordingly, the controller 100 and the sensing unit 400 can be activated or operated.

The control unit 100 generates a control signal for operating the PWM unit 200 and supplies the generated control signal to the PWM unit 200 when the control unit 100 is activated by the low power driving voltage supplied from the power supply unit 500. [

The PWM unit 200 generates a PWM signal for driving the boost converter 300 under the control of the controller 100 and supplies the generated PWM signal to the boost converter 300.

The boost converter 300 is operated by the PWM signal supplied from the PWM unit 200 to generate a DC voltage required for the operation of the electronic device 30. [

Hereinafter, each part of the driving apparatus 20 will be described in detail.

3 is a view for explaining a power supply unit. In the following, description of the parts described above may be omitted.

Referring to FIG. 3, the power supply unit 500 may include integrated circuit units CP1-CP5 corresponding to the types of low-power driving voltages to be generated.

Each integrated circuit portion CP1-CP5 can individually generate a low-power driving voltage.

For example, the first integrated circuit unit CP1 can convert the voltage applied to the eleventh capacitor C11 to + 15V and output it. To this end, the plus terminal of the eleventh capacitor C11 may be connected to the + Vin terminal of the first integrated circuit portion CP1, and the minus terminal may be connected to the -Vin terminal. In addition, the positive terminal of the eleventh capacitor C11 may be grounded, and the negative terminal may be connected to the positive terminal of the battery 10.

In FIG. 3, C10, C15, and C18 may denote RC filters.

Throughout the above description, the operation of the power supply unit 500 can be intuitively understood, so that detailed description will be omitted.

4 is a diagram for explaining a PWM unit. In the following, description of the parts described above may be omitted.

4, the PWM unit 200 may include a sixth integrated circuit unit (CP6) for generating a PWM signal for driving the boost converter 300 in response to a control signal supplied from the controller 100. Referring to FIG.

The sixth integrated circuit unit CP6 includes a first 1-8 pin and receives a control signal from the control unit 100 through the second pin and outputs a PWM signal to the sixth pin PWM_OUT. .

A power of +15 V generated by the power supply unit 500 may be supplied to the eighth pin of the sixth integrated circuit unit CP6 and a power of -5 V generated by the power supply unit 500 may be supplied to the fifth pin .

5 to 6 are diagrams for explaining the boost converter. In the following, description of the parts described above may be omitted.

5, the boost converter 300 includes a switching part (switching part) 300 disposed between a plus terminal Vin (+) and a minus terminal Vin (-) of the battery 10, TR and a transformer T disposed between the switching part TR and the positive terminal of the battery 10. [

The transformer T may include a primary coil, and a secondary coil corresponding to the primary coil. Hereinafter, the primary coil and the secondary coil of the transformer T may include one end and the other end, respectively.

One end of the primary coil of the transformer T corresponds to the positive terminal Vin (+) of the battery 10 and the other end of the transformer T (corresponding to the position denoted by 1 in the figure) Correspond) can be directed to the switching part TR. Further, one end of the secondary coil of the transformer T (corresponding to the position indicated by "5" in the figure) corresponds to one end of the primary coil, and the other end of the secondary coil corresponds to the other end of the primary coil .

Here, the primary coil of the transformer T may be located between the switching part TR and the positive terminal of the battery 10. [ In other words, the primary coil of the transformer T can be connected between the switching part TR and the positive terminal of the battery 10. [

The switching part TR may include a metal-oxide-semiconductor field effect transistor (MOSFET).

The switching unit TR may be turned on / off by a gate control signal input to a gate terminal, that is, a PWM signal PWM_OUT generated by the PWM unit 200. [

The boost converter 300 may further include a first capacitor C1, a second capacitor C2, a third capacitor C3, and a fourth capacitor C4 have.

Here, the first capacitor C1 may be arranged in parallel with the switching part TR, i.e., the MOSFET.

The second capacitor C2 is parallel to the secondary coil of the transformer T and can be arranged in series with the first capacitor C1.

The third capacitor C3 may be disposed in parallel with the first capacitor C1 and the second capacitor C2.

The voltage across the third capacitor (C3) may correspond to the output voltage of the boost converter (300).

The fourth capacitor C4 is connected between the first node n1 between the third capacitor C3 and the second capacitor C2 and one end of the secondary coil of the transformer T And a second node (second node, n2) between the corresponding nodes (corresponding positions).

In addition, the boost converter 300 may include a first diode (D1) and a second diode (D2) for controlling the current direction.

The first diode D1 is disposed between the fourth capacitor C1 and the first node n1 and the cathode of the first diode D1 faces the fourth capacitor C4, The anode of the first transistor D1 may be directed to the first node n1.

The second diode D2 may be disposed in parallel with the fourth capacitor C4 and the first diode D1 between the second node n2 and the first node n1. Here, the cathode of the second diode D2 may face the first node n1, and the anode of the second diode D2 may face the second node n2.

In addition, the boost converter 300 includes a third diode D3, a fourth diode D4, a fifth diode D5, a second resistor R2, And a capacitor (Fifth Capacitor, C5).

The third diode D3 and the fourth diode D4 are connected to a fifth node (Fifth Node) between the other end of the primary coil of the transformer T (corresponding to the position indicated by "4" , n5 and a fourth node (Fourth Node, n4) between the first capacitor (C1) and the second capacitor (C2).

The cathodes of the third diode D3 and the fourth diode D4 may face the fourth node n4 and the anode may face the fifth node n5,

The fifth capacitor C5 is connected between the sixth node (Sixth Node, n6) between the negative terminal of the battery 10, the switching unit TR, the first capacitor C1 and the third capacitor C3, n5 in parallel with the switching part TR.

The fifth diode D5 may be disposed between the fifth capacitor C5 and the fifth node n5. Here, the cathode of the fifth diode D5 may face the fifth capacitor C5, and the anode may face the fifth node n5.

The second resistor R2 may be disposed in parallel with the fifth diode D5.

The operation of the boost converter 300 having such a configuration will be described with reference to FIG. 6 attached hereto.

6, when the PWM unit 200 transmits a turn-on signal as a PWM signal to the gate terminal of the switching unit TR of the boost converter 300 under the control of the control unit 100, Can be turned on.

DC power can be supplied to the transformer T from the battery 10 in the direction indicated by an arrow in Fig. Thereby, a current flows in the transformer T, so that energy can be accumulated.

When the PWM unit 200 transmits a turn-off signal as a PWM signal to the gate terminal of the switching unit TR of the boost converter 300 under the control of the control unit 100, the switching unit TR is turned- Off.

Then, the energy accumulated by the transformer is added, and the output voltage of the boost converter 300 can be increased. 5 to 6, the directions of the first diode D1 and the second diode D2 may enable the output voltage of the boost converter 300 to rise.

Repeating this cycle by the PI control algorithm can increase the output voltage of the boost converter 300 as desired. For example, the output voltage of the boost converter 300, that is, the voltage applied to the third capacitor C3, can be raised to approximately 110 V DC.

7 to 8 are diagrams for explaining the voltage sensing unit. In the following, description of the parts described above may be omitted.

7, the voltage sensing unit 410 includes an eighth integrated circuit CP8 for reading the output voltage of the boost converter 300, and a voltage sensing unit for outputting a voltage sensing signal corresponding to the voltage value read by the eighth integrated circuit CP8 And a ninth integrated circuit (CP9)

The eighth integrated circuit CP8 includes the first to third pins, a low power driving voltage of -15V is supplied to the first pin, and a low power driving voltage of + 15V is supplied to the second pin.

The third pin M of the eighth integrated circuit CP8 is connected to the output terminal of the boost converter 300 (the first node n1 in Fig. 5) to read the output voltage of the boost converter 300 .

The ninth integrated circuit CP9 includes the 1-14 pins, the low power driving voltage of -15V is supplied to the eleventh pin GND, and the twelfth pin D + can be grounded.

The ninth integrated circuit CP9 outputs the second sensing signal (corresponding to the value of the output voltage of the boost converter 300) read to the third pin M of the eighth integrated circuit CP8 by the eighth pin Vo_C VT2).

The second sensing signal VT2 output from the ninth integrated circuit CP9 may be transmitted to the controller 100 as voltage sensing information of the voltage sensing unit 410. [

The control unit 100 receives the sensing information from the voltage sensing unit 410 and controls the PWM unit 200 using the received sensing information to output the PWM signal for controlling the operation of the boost converter 300 to the boost converter 300 ). ≪ / RTI >

In other words, when the output voltage of the boost converter 300 is greater than a preset reference voltage, the control unit 100 outputs a control signal for turning off the switching unit TR, that is, the MOSFET, (200). ≪ / RTI >

8, when the boost converter 300 outputs DC power for operating the electronic device 30 under the control of the control unit 100, at the time t1, Assume that the output voltage exceeds a preset reference voltage.

In this case, the controller 100 may recognize that the output voltage of the boost converter 300 is higher than the reference voltage, based on the sensing information transmitted from the voltage sensing unit 410.

The control unit 100 may control the PWM unit 200 to block the gate control signal (PWM signal) input to the gate terminal of the switching unit TR of the boost converter 300. [ Then, the switching operation of the switching unit TR is stopped, and the rise of the output voltage of the boost converter 300 can be suppressed.

Thus, stable operation of the vehicle electronic device 30 can be achieved.

The seventh integrated circuit CP7 can basically have a similar structure and function as the eighth integrated circuit CP8.

The third pin M of the seventh integrated circuit CP7 is connected to the input terminal of the boost converter 300 (the third node n3 in Fig. 5) to read the input voltage of the boost converter 300 have. Here, the input voltage of the boost converter 300 may correspond to the output voltage of the battery 10.

In the ninth integrated circuit CP9, a low power driving voltage of +15 V is supplied to the fourth pin (Vcc) out of the 1-14 pins, and the third pin (A +) can be grounded.

The ninth integrated circuit CP9 outputs the first sensing signal (corresponding to the value of the input voltage of the boost converter 300) read to the third pin M of the seventh integrated circuit CP7 by the seventh pin Vo_B VT1).

The first sensing signal VT1 output from the ninth integrated circuit CP9 may be transmitted to the controller 100 as voltage sensing information of the voltage sensing unit 410. [

In this case, the controller 100 can sense the voltage variation of the battery 10 based on the information sensed by the voltage sensing unit 410.

In FIG. 7, COM3 and COM4 may be terminals for providing information to other parts in order to perform other predetermined functions.

9 is a diagram for explaining the current sensing unit. In the following, description of the parts described above may be omitted.

9, the current sensing unit 420 includes a tenth integrated circuit CP10 for reading the value of current flowing through the boost converter 300, a current sensing circuit for sensing the current sensing signal corresponding to the current value read by the tenth integrated circuit CP10, And an eleventh integrated circuit (CP11) for outputting the output signal.

The current sensing unit 420 can sense a current flowing between the positive terminal of the battery 10 and the primary coil of the transformer T. [ In other words, in the boost converter 300, the third terminal (third node) n3 between the positive terminal of the battery 10 and one end of the primary coil of the transformer T (corresponding to "1" The current sensing unit 420 can sense the current.

The tenth integrated circuit CP10 includes the first to fourth pins, a low power driving voltage of + 15V is supplied to the first pin, and a low power driving voltage of -15V is supplied to the second pin.

The third pin V of the tenth integrated circuit CP10 is connected to the input terminal of the boost converter 300 (the third node n3 in Fig. 5) to read the current of the boost converter 300 have.

And the fourth pin G of the tenth integrated circuit CP10 may be grounded.

The eleventh integrated circuit CP11 includes the 1-14th pin, the low power driving voltage of + 15V is supplied to the fourth pin Vcc, and the third pin A + can be grounded.

The eleventh integrated circuit CP11 corresponds to the current value flowing to the third node n3 of the boost converter 300 read to the third pin V of the tenth integrated circuit CP10 by the seventh pin Vo_B And output the current sensing signal CT2.

The current sensing signal CT2 output from the eleventh integrated circuit CP11 may be transmitted to the controller 100 as current sensing information of the current sensing unit 420. [

The control unit 100 receives the current sensing information from the current sensing unit 420 and controls the PWM unit 200 using the received sensing information to output a PWM signal for controlling the operation of the boost converter 300 to the boost converter 300).

In other words, when the current flowing through the boost converter 300 is greater than a predetermined reference current, the control unit 100 outputs a control signal for turning off the switching unit TR, that is, the MOSFET, (200). ≪ / RTI >

In this case, it is possible to prevent the excessively large current from flowing to the boost converter 300, thereby enabling stable operation of the vehicle electronic device 30. [

In FIG. 9, COM1 may be a terminal for providing information to other parts in order to perform other predetermined functions.

In addition, CON2 in FIG. 9 may be a predetermined connector for connecting with other parts.

As described above, it is to be understood that the technical structure of the present invention can be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

Claims (9)

A power supply unit that receives power from a battery and generates a low power driving voltage;
A boost converter for generating driving power for driving the vehicle electronic device by receiving power from the battery;
A sensing unit sensing at least one of current or voltage information of the boost converter;
A PWM unit (Pulse Width Modulation Part) for generating a PWM signal (Pulse Width Modulation Signal) for driving the boost converter; And
A controller for generating a control signal for controlling the PWM unit based on information sensed by the sensing unit;
And a driving device for driving the electronic device. The method according to claim 1,
The sensing unit
A voltage sensor for sensing an output voltage of the boost converter; And
A current sensor for sensing a current of the boost converter;
. 3. The method of claim 2,
The boost converter
A switching part disposed between the plus (+) terminal and the minus (-) terminal of the battery; And
A transformer disposed between the switching unit and the plus terminal of the battery;
Lt; / RTI >
The primary coil of the transformer is located between the switching unit and the plus terminal of the battery,
Wherein the switching unit includes a MOSFET,
Wherein the PWM signal generated by the PWM section is input to a gate terminal of the MOSFET. The method of claim 3,
The boost converter
A first capacitor disposed in parallel with the MOSFET;
A second capacitor in parallel with the secondary coil of the transformer and arranged in series with the first capacitor;
A third capacitor arranged in parallel with the first capacitor and the second capacitor; And
A fourth capacitor disposed between a first node between the third capacitor and the second capacitor and one end of the secondary coil of the transformer;
Further comprising: 5. The method of claim 4,
The boost converter
A first diode disposed between the fourth capacitor and the first node; And
A second diode between the output terminal of the secondary coil of the transformer and the fourth capacitor and the first node between the fourth capacitor and the fourth capacitor and a second diode arranged in parallel with the first diode Diode);
Further comprising:
Wherein a cathode of the first diode is directed to the fourth capacitor, an anode of the first diode is directed to the first node,
Wherein a cathode of the second diode is directed to the first node and an anode of the second diode is directed to the second node. 5. The method of claim 4,
And the voltage across the third capacitor corresponds to the output voltage of the boost converter. The method of claim 3,
Wherein the current sensing unit senses a current flowing between a positive terminal of the battery and a primary coil of the transformer. 8. The method of claim 7,
The control unit
And a control unit for providing a control signal to the PWM unit to turn off the MOSFET when the current flowing between the positive terminal of the battery and the primary coil of the transformer is greater than a preset reference current, . 3. The method of claim 2,
The control unit
And provides the PWM section with a control signal for turning off the MOSFET when an output voltage of the boost converter is greater than a preset reference voltage.

Images