Brake system

Abstract

The invention discloses a brake system. The brake system may include: a first power source that supplies a first voltage; a motor which receives electric power from the first power source and is driven to generate brake hydraulic pressure while the vehicle travels; a second power supply that supplies a power supply having a second voltage lower than the first voltage; and a controller receiving power from the second power source to control the motor.

Description

Technical Field

[0001] The present invention relates to a brake system, and more particularly, to a brake system provided in a vehicle to generate a braking force required for decelerating or stopping the vehicle when the vehicle is traveling. Background Art

[0002] In recent years, electric brakes that transmit the driver's brake pedal operation amount through electrical signals to drive the motor and generate brake pressure according to the drive of the motor are widely used. Through the automatic control and drive of the motor, electric brakes can also perform braking without the intervention of the driver, so they have great utilization value in realizing unmanned driving technology.

[0003] The power supply of the electrical and electronic equipment of conventional vehicles usually uses a 12V battery. In this case, the circuit for driving and controlling the electric brake is also designed according to 12V.

[0004] In addition, recently, electric vehicles driven by electric motors instead of internal combustion engines are becoming more and more popular, and the braking system of electric vehicles is composed of electric brakes. Electric vehicles are equipped with batteries that provide higher voltage (for example, 48V) than before as driving power sources. Therefore, in order to improve efficiency, it is considered to use the above-mentioned high-voltage battery as the power source of the electric brake installed on the electric vehicle.

[0005] However, if all the power sources for the control and drive-related circuits of the electric brake are replaced with the above-mentioned high-voltage batteries, it will be necessary to develop and mass-produce new circuit components, which may cause problems from an economic perspective. In addition, although high-voltage power sources are effective in driving the motor that generates brake fluid pressure in the electric brake, low-voltage power sources are more effective in other control-related circuits.

[0006] Prior art literature

[0007] Patent Literature

[0008] Korean authorized patent No. 1001268, "Solenoid drive circuit and error diagnosis method", registered on December 8, 2010. Summary of the invention

[0009] Problem that the invention aims to solve

[0010] The present invention is used to solve the above-mentioned problem. An object of the present invention is to provide a braking system which maximizes the efficiency of power use and the economy of circuit configuration by combining a high voltage power supply with a low voltage power supply.

[0011] Another object of the present invention is to provide a braking system which, while using a high voltage power supply and a low voltage power supply as dual power supplies, can also provide redundancy through the low voltage power supply when the high voltage power supply cannot provide power.

[0012] The technical problems of the present invention are not limited to the technical problems mentioned above, and ordinary technicians in the technical field to which the present invention belongs can clearly understand other technical problems not mentioned through the following description.

[0013] Means used to solve problems

[0014] According to one aspect of the present invention, a braking system is provided, which is a braking system of a vehicle, wherein the braking system includes: a first power supply that supplies a first voltage; a motor that receives power from the first power supply and is driven to generate braking hydraulic pressure during vehicle driving; a second power supply that supplies a second voltage lower than the first voltage; and a controller that receives power from the second power supply to control the motor.

[0015] The brake system according to one aspect of the present invention further includes an inverter which is arranged between the first power source and the motor and converts power supplied from the first power source to the motor, and the controller may send an inverter control signal for controlling the inverter.

[0016] The brake system according to one aspect of the present invention may further include: a motor driver disposed between the controller and the inverter and converting the inverter control signal sent by the controller into a signal for operating the inverter.

[0017] The brake system according to an aspect of the present invention further includes a valve regulating the flow of the brake hydraulic pressure, and the controller may receive power from the second power source to control the valve.

[0018] The brake system according to an aspect of the present invention may further include: a switch disposed between the first power source and the motor to control on / off of power supplied from the first power source to the motor.

[0019] In the brake system according to an aspect of the present invention, the controller may receive monitoring information on one or more of a voltage and a current supplied by the first power source from the switch.

[0020] The brake system according to an aspect of the present invention may further include: a regulator disposed between the second power source and the controller to regulate a voltage of power supplied from the second power source to the controller.

[0021] The brake system according to one aspect of the present invention further includes a motor position sensor for sensing the position of the motor, and the controller may supply power to the motor position sensor and receive motor position information from the motor position sensor.

[0022] The brake system according to one aspect of the present invention further includes a pedal displacement sensor for sensing the displacement of a brake pedal of the vehicle, and the controller may supply power to the pedal displacement sensor and receive pedal displacement information from the pedal displacement sensor.

[0023] The brake system according to an aspect of the present invention further includes a pressure sensor sensing brake pressure supplied to wheels of the vehicle, and the controller may supply power to the pressure sensor and receive brake pressure information from the pressure sensor.

[0024] The brake system according to one aspect of the present invention further includes a wheel speed sensor sensing the speed of a wheel of the vehicle, and the controller may supply power to the wheel speed sensor and receive wheel speed information from the wheel speed sensor.

[0025] According to one aspect of the present invention, the braking system also includes: an electronic parking brake driver that controls an electronic parking brake, wherein the electronic parking brake provides a parking braking force for maintaining a parking state when the vehicle is parked, and the controller can supply power to the electronic parking brake driver and send a control signal for controlling the electronic parking brake.

[0026] According to another aspect of the present invention, a braking system is provided, which is a braking system of a vehicle, and includes: a first power supply, which supplies a power supply of a first voltage; a motor, which receives power from the first power supply and is driven to generate braking hydraulic pressure during vehicle driving; a second power supply, which supplies a power supply of a second voltage lower than the first voltage; a controller, which receives power from the second power supply to control the motor; and a converter, which is arranged between the second power supply and the motor and boosts the voltage supplied by the second power supply to a first voltage, and when the first power supply cannot supply power to the motor, the controller boosts the power supplied by the second power supply to the first voltage through the converter and supplies it to the motor.

[0027] The brake system according to another aspect of the present invention further includes: an inverter configured between the first power source and the motor and converting power supplied from the first power source to the motor, and the controller can send an inverter control signal for controlling the inverter.

[0028] The brake system according to another aspect of the present invention may further include: a motor driver disposed between the controller and the inverter and converting the inverter control signal sent by the controller into a signal for actuating the inverter.

[0029] The brake system according to another aspect of the present invention further includes a valve configured to adjust the flow of the brake hydraulic pressure, and the controller may receive power from the second power source to control the valve.

[0030] The brake system according to another aspect of the present invention may further include: a switch disposed between the first power source and the motor to control on / off of power supplied from the first power source to the motor.

[0031] In the brake system according to another aspect of the present invention, the controller may receive monitoring information on one or more of a voltage and a current supplied by the first power source from the switch.

[0032] The brake system according to another aspect of the present invention may further include: a regulator disposed between the second power source and the controller to regulate a voltage of power supplied from the second power source to the controller.

[0033] The brake system according to another aspect of the present invention further includes a motor position sensor for sensing the position of the motor, and the controller may supply power to the motor position sensor and receive motor position information from the motor position sensor.

[0034] Effects of the Invention

[0035] According to the above structure, the braking system according to one aspect of the present invention can use a first power supply as the driving power supply of the motor, and use a second power supply that provides a lower voltage than the first power supply as the power supply of the controller that controls the motor, thereby meeting the efficiency of power supply use and the economy of circuit structure.

[0036] According to one aspect of the present invention, a braking system uses a relatively high voltage first power supply and a relatively low voltage second power supply as dual power supplies. When the first power supply fails to supply power, redundancy is provided by the second power supply and the converter, thereby improving the safety of the vehicle.

[0037] The effects of the present invention are not limited to the above-mentioned effects, and should be understood to include all effects that can be derived from the constitution of the invention described in the detailed description of the present invention or the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 FIG. 1 is a diagram schematically showing the configuration of a brake system according to an embodiment of the present invention.

[0039] Figure 2 FIG. 1 is a diagram showing in detail the configuration of a brake system according to an embodiment of the present invention.

[0040] Figure 3 FIG. 1 is a diagram schematically showing a configuration of a brake system according to another embodiment of the present invention.

[0041] Figure 4 FIG. 1 is a diagram showing in detail the configuration of a brake system according to another embodiment of the present invention.

[0042] Description of Reference Numerals

[0043] 100, 200: Braking system

[0044] 101, 201: First Power Source

[0045] 102, 202: Second power supply

[0046] 105, 205: Motor

[0047] 110, 210: Controller DETAILED DESCRIPTION

[0048] Hereinafter, embodiments of the present invention are described in detail with reference to the accompanying drawings so that a person skilled in the art can easily implement the present invention. The present invention can be implemented in various forms and is not limited to the embodiments described herein. In order to clearly explain the present invention, parts not related to the description are omitted in the accompanying drawings, and the same reference numerals are given to the same or similar components throughout the specification.

[0049] The words and terms used in this specification and claims should not be interpreted as being limited to their usual or dictionary meanings, but should be interpreted as meanings and concepts corresponding to the technical ideas of the present invention in accordance with the principle that the inventor is able to define terms and concepts to best describe his own invention.

[0050] In this specification, the terms "include" or "have" are used to illustrate the existence of features, numbers, steps, actions, constituent elements, parts or their combinations recorded in the specification, rather than excluding the existence or additional possibilities of one or more other features, numbers, steps, actions, constituent elements, parts or their combinations in advance.

[0051] Figure 1 FIG. 1 is a diagram schematically showing the configuration of a brake system according to an embodiment of the present invention. Figure 2 FIG. 1 is a diagram showing in detail the configuration of a brake system according to an embodiment of the present invention.

[0052] The braking system 100 according to an embodiment of the present invention is applied to a vehicle. More specifically, the braking system 100 is configured in the vehicle to generate a braking force required for decelerating or stopping the vehicle during the vehicle's running.

[0053] The brake system 100 may be an electric brake system that transmits the amount of brake pedal operation by the driver through an electrical signal to drive the motor and generates brake pressure according to the drive of the motor. In addition, it is also conceivable to mount the brake system 100 on an autonomous vehicle to drive the motor according to the driving conditions without the driver's brake pedal operation and generate brake pressure according to the drive of the motor.

[0054] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, the braking system 100 includes a first power source 101 and a second power source 102. That is, the braking system 100 has a dual-power source structure.

[0055] The first power supply 101 supplies a power supply of a first voltage. More specifically, the first power supply 101 may supply a DC power supply having a first voltage. The first power supply 101 may be a battery providing a first voltage. For example, the first voltage may be 48V.

[0056] The second power supply 102 supplies a power supply of a second voltage lower than the first voltage. More specifically, the second power supply 102 can supply a DC power supply having a second voltage. The second power supply 102 can be a battery that provides the second voltage. For example, the second voltage can be 12V.

[0057] The first power supply 101 supplies a first voltage power supply for driving the motor 105. In addition, the second power supply 102 supplies a second voltage power supply for controlling the motor 105. More specifically, the second power supply 102 can be used to control the operation of the controller 110 of the motor 105.

[0058] The braking system 100 may include: a first circuit A1 including a motor 105 driven by a first power source 101 and a structure for driving or monitoring the motor 105 ; and a second circuit A2 including a controller 110 operated by a second power source 102 .

[0059] In one embodiment of the present invention, a motor 105 , a switch 103 , an inverter 104 , a motor driver 106 , a motor position sensor 107 and a current sensor 108 are provided in the first circuit A1 .

[0060] The motor 105 receives power from the first power source 101 and is driven to generate brake hydraulic pressure during vehicle travel. For example, the motor 105 may be a three-phase motor.

[0061] The motor 105 may operate a pump (not shown) that generates brake fluid pressure. In other words, the pump may operate according to the drive of the motor 105 and generate brake fluid pressure.

[0062] The switch 103 is disposed between the first power source 101 and the motor 105 to control on / off of the power supplied from the first power source 101 to the motor 105. The switch 103 may transmit monitoring information on one or more of the voltage and current supplied by the first power source 101 to the controller 110.

[0063] The inverter 104 is disposed between the first power source 101 and the motor 105, and converts power supplied from the first power source 101 to the motor 105. More specifically, the inverter 104 may be disposed between the switch 103 and the motor 105.

[0064] The inverter 104 can convert the DC power supplied by the first power source 101 into AC power. As described above, the motor 105 can be a three-phase motor, and the inverter 104 can convert the DC power of the first voltage supplied by the first power source 101 into AC power capable of driving the three-phase motor.

[0065] The inverter 104 may include a plurality of field effect transistors (FETs) operating under the control of the controller 110. Through the operation of the FETs of the inverter 104, the first voltage power supplied by the first power source 101 may be supplied to the U phase, V phase, and W phase of the motor respectively.

[0066] The inverter 104 may operate according to the inverter control signal sent by the controller 110. At this time, the inverter control signal may be a signal in the form of pulse width modulation (PWM).

[0067] The motor driver 106 may convert the inverter control signal sent by the controller 110 into a signal for operating the inverter 104. The motor driver 106 may convert the voltage of the inverter control signal sent by the controller 110 into a voltage that can operate the inverter 104 and provide the voltage to the inverter 104.

[0068] For example, when the inverter control signal is a PWM signal having a voltage level corresponding to the operating voltage of the controller 110 , the motor driver 106 may convert the voltage level of the inverter control signal into a voltage level that can operate the inverter 104 .

[0069] The motor position sensor 107 senses the position of the motor 105. The motor position information sensed by the motor position sensor 107 can be used to control the motor 105. The motor position sensor 107 can send the motor position information to the controller 110.

[0070] The current sensor 108 senses the current of the motor 105. The motor current information sensed by the current sensor 108 can be used to control the motor 105. The current sensor 108 can send the motor current information to the controller 110.

[0071] In an embodiment of the present invention, a controller 110 , a regulator 109 , a valve 111 , an electronic parking brake actuator 112 , a pedal displacement sensor 113 , a pressure sensor 114 and a wheel speed sensor 115 may be provided in the second circuit A2 .

[0072] The controller 110 receives power from the second power source 102 to control the motor 105. The controller 110 may include one or more micro controller units (MCU).

[0073] The controller 110 may control the motor 105 by controlling the inverter 104 that converts the power supplied from the first power source 101 to the motor 105. In other words, the controller 110 may transmit an inverter control signal for controlling the inverter 104.

[0074] The inverter control signal may be a signal in the form of pulse width modulation (PWM). At this time, the voltage level of the inverter control signal may have an operating voltage of the controller 110 .

[0075] The controller 110 may send the inverter control signal to the motor driver 106. The voltage level of the inverter control signal has an operating voltage of the controller 110, but this may be different from a voltage at which the inverter 104 can operate. As described above, the voltage of the inverter control signal sent by the controller 110 may be converted into a voltage at which the inverter 104 can operate by the motor driver 106 and provided to the inverter 104.

[0076] The controller 110 may receive monitoring information for one or more of the voltage and the current supplied by the first power source 101 from the switch 103. The controller 110 may determine whether the first power source 101 is supplying power normally based on the monitoring information received from the switch 103.

[0077] The controller 110 supplies power to the motor position sensor 107. In addition, the controller 110 receives motor position information from the motor position sensor 107. The motor position sensor 107 does not require a high voltage power supply in operation compared to the motor 105. Therefore, it is effective to supply power to the motor position sensor 107 using the controller 110 operating at a voltage level lower than the first voltage.

[0078] In addition, the controller 110 may supply power to the valve 111, the electronic parking brake actuator 112, the pedal displacement sensor 113, the pressure sensor 114, and the wheel speed sensor 115. In addition, the controller 110 may control the valve 111 and the electronic parking brake actuator 112. In addition, the controller 110 may receive pedal displacement information from the pedal displacement sensor 113, brake pressure information from the pressure sensor 114, and wheel speed information from the wheel speed sensor 115.

[0079] The regulator 109 is disposed between the second power source 102 and the controller 110 to regulate the voltage of the power supplied from the second power source 102 to the controller 110. In one embodiment of the present invention, the regulator 109 may be formed by an application specific integrated circuit (ASIC).

[0080] The operating voltage of the controller 110 may be a voltage lower than the second voltage supplied by the second power supply 102. For example, the second voltage is 12V, and the operating voltage of the controller 110 may be 3.3V. In this case, the regulator 109 may regulate the 12V voltage supplied by the second power supply 102 to 3.3V.

[0081] The valve 111 regulates the flow of the brake hydraulic pressure generated according to the driving of the motor 105. A plurality of valves 111 may be disposed in a hydraulic circuit through which the generated brake hydraulic pressure flows. For example, the valve 111 may be a solenoid valve.

[0082] The valve 111 may be controlled by the controller 110. In other words, the controller 110 may receive power from the second power source 102 to control the valve 111.

[0083] The electronic parking brake driver 112 controls the electronic parking brake, which provides a parking brake force for maintaining a parking state when the vehicle is parked. For example, the electronic parking brake may be a motor on caliper (MoC) type parking brake.

[0084] The electronic parking brake driver 112 may be controlled by the controller 110. That is, the controller 110 may supply power to the electronic parking brake driver and transmit a control signal for controlling the electronic parking brake.

[0085] The pedal displacement sensor 113 senses the displacement of the brake pedal of the vehicle. The pedal displacement sensor 113 can sense at least one of the angle and the moving distance of the brake pedal. The pedal displacement information sensed by the pedal displacement sensor 113 can be used for the controller 110 to control the motor 105.

[0086] The pedal displacement sensor 113 may be controlled by the controller 110. Specifically, the controller 110 may supply power to the pedal displacement sensor 113. In addition, the controller 110 may receive pedal displacement information from the pedal displacement sensor 113.

[0087] The pressure sensor 114 senses the brake pressure supplied to the wheels of the vehicle. The pressure sensor 114 can sense the brake pressure supplied to the wheel side of the vehicle so that the brake pad pressurizes the brake disc. The brake pressure information sensed by the pressure sensor 114 can be used for the controller 110 to control the motor 105.

[0088] The pressure sensor 114 may be controlled by the controller 110. More specifically, the controller 110 may supply power to the pressure sensor 114. In addition, the controller 110 may receive brake pressure information from the pressure sensor 114.

[0089] The wheel speed sensor 115 senses the wheel speed of the vehicle. The wheel speed sensor 115 may be respectively disposed on a plurality of wheels of the vehicle. The wheel speed information sensed by the wheel speed sensor 115 may be used as one of the variables used by the controller 110 to control the motor 105.

[0090] The wheel speed sensor 115 may be controlled by the controller 110. More specifically, the controller 110 may supply power to the wheel speed sensor 115. In addition, the controller 110 may receive wheel speed information from the wheel speed sensor 115.

[0091] So far, the brake system 100 according to one embodiment of the present invention has been described in detail. Next, a brake system 200 according to another embodiment of the present invention will be described.

[0092] Figure 3 FIG. 1 is a diagram schematically showing the structure of a brake system according to another embodiment of the present invention. Figure 4 FIG. 1 is a diagram showing in detail the configuration of a brake system according to another embodiment of the present invention.

[0093] Reference Figure 3 and Figure 4According to another embodiment of the present invention, a braking system 200 includes a first power source 201 and a second power source 202. The first power source 201 and the second power source 202 provide a dual-power source structure.

[0094] The first power source 201 supplies a power source of a first voltage. The first power source 201 may be a battery that supplies a DC power source having a first voltage. At this time, the first voltage may be 48V.

[0095] The second power source 202 supplies a second voltage lower than the first voltage. The second power source 202 may be a battery that supplies a DC power source having a second voltage. In this case, the second voltage may be 12V.

[0096] The first power supply 201 supplies a first voltage power for driving the motor 205. In addition, the second power supply 202 supplies a second voltage power for controlling the operation of the controller 210 of the motor 205.

[0097] According to another embodiment of the present invention, a braking system 200 may include: a first circuit B1 including a motor 205 driven by a first power source 201 and a structure for driving or monitoring the motor 205 ; and a second circuit B2 including a controller 210 actuated by a second power source 202 .

[0098] In another embodiment of the present invention, a motor 205 , a switch 203 , an inverter 204 , a motor driver 206 , a motor position sensor 207 and a current sensor 208 are provided in the first circuit B1 .

[0099] In another embodiment of the present invention, a controller 210 , a regulator 209 , a valve 211 , an electronic parking brake actuator 212 , a pedal displacement sensor 213 , a pressure sensor 214 and a wheel speed sensor 215 may be provided in the second circuit B2 .

[0100] The configurations configured in the first circuit B1 and the second circuit B2 are the same as those of the brake system 100 according to one embodiment of the present invention. In other words, the motor 205, the switch 203, the inverter 204, the motor driver 206, the motor position sensor 207, the current sensor 208, the regulator 209, the valve 211, the electronic parking brake driver 212, the pedal displacement sensor 213, the pressure sensor 214, and the wheel speed sensor 215 are the same as those of the one embodiment of the present invention. Therefore, in the description of the brake system 200 according to another embodiment of the present invention, the parts that overlap with the contents described about the one embodiment of the present invention will be omitted.

[0101] Compared with the brake system 100 according to one embodiment of the present invention, the brake system 200 according to another embodiment of the present invention further includes a converter 220. The details of the converter 220 will be described below.

[0102] The converter 220 is disposed between the second power source 202 and the motor 205 and boosts the voltage supplied by the second power source 202 to the first voltage. When the first power source 201 cannot supply power, the converter 220 enables the second power source 202 to take over the function of the first power source 201.

[0103] The converter 220 may be controlled by the controller 210. More specifically, when the first power source 201 cannot supply power to the motor 205, the controller 210 boosts the power supplied by the second power source 202 to the first voltage through the converter 220 and supplies the power to the motor 205.

[0104] In association, the switch 203 may send monitoring information for any one or more of the voltage and current supplied by the first power source 201 to the controller 210. The controller 210 receives monitoring information for any one or more of the voltage and current supplied by the first power source 201 from the switch 203, and may determine whether the first power source 201 is unable to supply power to the motor 205 through the received monitoring information.

[0105] When it is determined that the first power source 201 cannot supply power to the motor 205, the controller 210 boosts the power supplied by the second power source 202 to the first voltage through the converter 220 and supplies it to the motor 205. Therefore, even if the first power source 201 fails, the motor 205 can still operate.

[0106] According to another embodiment of the present invention, during the vehicle driving process, even if the first power source 201 fails to supply power, the brake hydraulic pressure can be continuously generated by the motor 205. Thus, the safety hazard caused by the loss of braking force can be avoided.

[0107] The braking system according to the present invention provides a dual-power supply structure, that is, a first power supply with a relatively high voltage, i.e., a first voltage, supplies power to the motor, and a second power supply with a second voltage lower than the first voltage supplies power to a controller with a low driving voltage.

[0108] Such a structure can directly use the motor control circuit designed to match the conventional power supply with relatively low voltage while improving the motor drive efficiency. Therefore, when the present invention is used, the motor drive efficiency and the economic efficiency of the circuit design can be met in terms of motor drive.

[0109] Although the embodiments of the present invention have been described, the technical concept of the present invention is not limited to the embodiments presented in this specification, and those skilled in the art who understand the technical concept of the present invention can easily propose other embodiments within the scope of the same technical concept by adding, changing, deleting, adding, etc. to the constituent elements. However, this will also be considered to fall within the scope of the present invention.

Claims

1. A braking system, the braking system being a braking system of a vehicle, wherein: The braking system comprises: A first power supply, supplying a first voltage; a motor, driven by receiving electric power from the first power source to generate brake hydraulic pressure during vehicle travel; a second power supply that supplies a second voltage lower than the first voltage; and A controller receives power from the second power source to control the motor.

2. The braking system according to claim 1, wherein: Also includes: an inverter, arranged between the first power source and the motor and converting power supplied from the first power source to the motor, The controller sends an inverter control signal for controlling the inverter.

3. The braking system according to claim 2, wherein: Also includes: The motor driver is arranged between the controller and the inverter and converts the inverter control signal sent by the controller into a signal for operating the inverter.

4. The braking system according to claim 1, wherein: Also includes: valve, regulating the flow of the brake hydraulic pressure, The controller receives power from the second power source to control the valve.

5. The braking system according to claim 1, wherein: Also includes: a motor position sensor, sensing the position of the motor, The controller supplies power to the motor position sensor and receives motor position information from the motor position sensor.

6. The braking system according to claim 1, wherein: Also includes: a pedal displacement sensor, sensing the displacement of a brake pedal of the vehicle, The controller supplies power to the pedal displacement sensor and receives pedal displacement information from the pedal displacement sensor.

7. The braking system according to claim 1, wherein: Also includes: a pressure sensor to sense brake pressure supplied to a wheel of the vehicle, The controller supplies power to the pressure sensor and receives brake pressure information from the pressure sensor.

8. The braking system according to claim 1, wherein: Also includes: A wheel speed sensor, sensing the speed of the vehicle's wheels, The controller supplies power to the wheel speed sensor and receives wheel speed information from the wheel speed sensor.

9. The braking system according to claim 1, wherein: Also includes: an electronic parking brake driver for controlling an electronic parking brake, the electronic parking brake providing a parking brake force for maintaining a parking state when the vehicle is parked, The controller supplies power to the electronic parking brake actuator and transmits a control signal for controlling the electronic parking brake.

10. A braking system, the braking system being a braking system of a vehicle, wherein: The braking system comprises: A first power supply, supplying a first voltage; a motor, driven by receiving electric power from the first power source to generate brake hydraulic pressure during vehicle travel; a second power supply, supplying a second voltage lower than the first voltage; a controller that receives power from the second power source to control the motor; and a converter, arranged between the second power source and the motor and configured to boost the voltage supplied by the second power source to a first voltage, When the first power source is unable to supply power to the motor, the controller boosts the power supplied by the second power source to a first voltage through the converter and supplies the power to the motor.

11. The brake system according to claim 10, wherein: Also includes: an inverter, arranged between the first power source and the motor and converting power supplied from the first power source to the motor, The controller sends an inverter control signal for controlling the inverter.

12. The brake system according to claim 11, wherein: Also includes: The motor driver is arranged between the controller and the inverter and converts the inverter control signal sent by the controller into a signal for operating the inverter.

13. The brake system according to claim 10, wherein: Also includes: a valve configured to regulate the flow of the brake hydraulic pressure, The controller receives power from the second power source to control the valve.

14. The brake system according to claim 10, wherein: Also includes: a motor position sensor, sensing the position of the motor, The controller supplies power to the motor position sensor and receives motor position information from the motor position sensor.

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