JP2002012135A - Electric brake system - Google Patents

Abstract

(57) [Problem] To provide an electric brake system capable of backing up when a failure occurs in a controller or in a battery. SOLUTION: A plurality of electric brakes 11a to 11d driven by an electric motor, and these electric brakes 11a to 1d are provided.
A plurality of motor controllers 12A and 12B for controlling the electric motor 1d;
The main controller 14 outputs control signals to the main controllers 2A and 12B, the batteries 15A to 15C individually provided for the plurality of motor controllers 12A and 12B and the main controller 14, and the operation inputs to the brake pedal, respectively. Individual battery 15A
Brake operation sensors 13a connected to .about.15C
To 13c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electric brake system for generating a braking force by electric power.

[0002]

2. Description of the Related Art An example of a conventional electric brake system is disclosed in Japanese Patent Application Laid-Open No. 11-170991. In this type of conventional electric brake system, one battery that can supply power to an ECU (controller) is provided. The ECU controls all electric brakes. Further, a plurality of brake operation sensors are connected to the ECU, and power is supplied to these brake operation sensors from one battery via the ECU.

[0003]

In the above-mentioned electric brake system, all the electric brakes are controlled by the ECU. If the ECU fails, all the electric brakes cannot be operated. there were. In addition, one battery that can supply power to the ECU is provided, and a plurality of brake operation sensors
Since the power is supplied from one battery via the U, there is a problem that if a failure occurs in the battery, the ECU and the plurality of brake operation sensors become disabled.

[0004] It is an object of the present invention to provide an electric brake system capable of backing up when a failure occurs in a controller or a battery.

[0005]

In order to achieve the above object, an electric brake system according to claim 1 of the present invention comprises:
A plurality of electric brakes driven by electric motors, a plurality of motor controllers for controlling the electric motors of the electric brakes, a main controller for outputting control signals to the plurality of motor controllers, the plurality of motor controllers and the main motor; It is characterized by having a battery provided individually in the controller, and at least one brake operation sensor that detects an operation input to a brake pedal and is connected to the plurality of batteries.

As described above, since the main controller and the plurality of motor controllers are provided, even if a failure occurs in the main controller, the motor controller can back up the control of the brake system. Also, since the main controller and the plurality of motor controllers are individually provided with batteries, even if one of the batteries fails, the other batteries and the controller connected thereto control the brake system. Backup becomes possible.

An electric brake system according to a second aspect of the present invention includes a plurality of electric brakes driven by electric motors, a plurality of motor controllers for controlling the electric motors of the electric brakes, and control of the plurality of motor controllers. A main controller that outputs a signal, a battery separately provided to each of the plurality of motor controllers and the main controller, and a battery that detects an operation input to a brake pedal and is connected to one of the different batteries. And a plurality of brake operation sensors.

As described above, since the main controller and the plurality of motor controllers are provided, even if a failure occurs in the main controller, the motor controller can back up the control of the brake system. Also, since the main controller and the plurality of motor controllers are individually provided with batteries, even if one of the batteries fails, the other batteries and the controller connected thereto control the brake system. Backup becomes possible. Further, since a plurality of brake operation sensors are connected to individual batteries, even if a failure occurs in any one of the batteries, backup can be performed by another battery and the brake operation sensor connected thereto.

According to a third aspect of the present invention, in the electric brake system according to the first aspect, detection signals of the plurality of brake operation sensors are output to the main controller and the plurality of motor controllers. It is characterized by having.

As described above, the detection signals of the plurality of brake operation sensors are output to the main controller and the plurality of motor controllers, so that even if a failure occurs in the main controller, backup can be performed by the motor controller. .

According to a fourth aspect of the present invention, there is provided the electric brake system according to any one of the first to third aspects, further comprising a warning unit for warning a malfunction of the system. Power can be supplied from any of the batteries.

As described above, the warning means can be supplied with power from any of the plurality of batteries. Therefore, even if one of the batteries fails, it is possible to drive the warning means by supplying power from another battery. it can.

According to a fifth aspect of the present invention, there is provided an electric brake system according to any one of the first to fourth aspects, wherein the plurality of brake operation sensors respectively detect ON / OFF of a brake pedal. It is characterized by comprising a brake operation switch and a brake operation amount sensor for detecting an operation amount of a brake pedal, wherein the brake operation amount sensor is corrected based on a detection signal of the brake operation switch.

Thus, ON / OF of the brake pedal is performed.
The brake operation amount sensor that detects the operation amount of the brake pedal can be corrected based on the detection signal of the brake operation switch that detects F.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric brake system according to a first embodiment of the present invention will be described below with reference to FIG.

The electric brake system comprises a brake pedal 1 operated by a driver and the brake pedal 1
And a plurality of, specifically, four electric brakes 11a, 11b, 11c, 11 that generate a braking force on the vehicle by being driven by an electric motor (not shown).
d and a plurality of, specifically two motor controllers 1 for controlling the electric motors of these electric brakes 11a to 11d.
2A and 12B.

The electric brakes 11a to 11d are mounted on the front, rear, left and right wheels of the vehicle. For example, an electric brake 11a for the right front wheel and an electric brake 11b for the left rear wheel are driven by one motor controller 12A. , While the driving of the electric brake 11c for the left front wheel and the electric brake 11d for the right rear wheel are controlled by one motor controller 12B.

The electric brake system detects a plurality of operation inputs to the brake pedal 1, such as presence / absence of an operation on the brake pedal 1, a depression force on the brake pedal 1, a stroke of the brake pedal 1, and the like. Brake operation sensors 13a, 13b, 13c, signals from these brake operation sensors 13a to 13c, signals from a wheel speed sensor (not shown), signals from a wheel behavior sensor (not shown), and other controllers not shown. The plurality of motor controllers 12A, 12A,
And a main controller 14 for outputting a control signal such as a braking force command to 12B.

Further, in this electric brake system, the plurality of motor controllers 12A and 12B and the main controller 14 are provided with batteries 15A, 15B and 15C, respectively. That is,
The motor controller 12A includes the motor controller 1
A battery 15A for supplying power to 2A, a battery 15B for supplying power to the motor controller 12B is connected to the motor controller 12B, and a battery 15C for supplying power to the main controller 14 is connected to the main controller 14.

Here, all of the above-mentioned brake operation sensors 13a, 13b and 13c are connected to individual batteries 15A, 15B and 15C, respectively. That is, the brake operation sensor 13a has a battery 15A that supplies power to the brake operation sensor 13a, the brake operation sensor 13b has a battery 15B that supplies power to the brake operation sensor 13b, and the brake operation sensor 13c has a battery 15A that supplies power to the brake operation sensor 13c. The battery 15C that supplies power is
Each is connected.

The detection signals of all the brake operation sensors 13a, 13b, 13c are output to the main controller 14 and all of the plurality of motor controllers 12A, 12B. That is,
The detection signal of the brake operation sensor 13a is transmitted to the main controller 14 and the plurality of motor controllers 12A, 1A.
2B, the detection signal of the brake operation sensor 13b is also output to the main controller 14 and the plurality of motor controllers 12A and 12B, and the detection signal of the brake operation sensor 13c is also output to the main controller 14 and the plurality of motor controllers. 12A and 12B.

During normal operation, as described above, the main controller 14 outputs signals from all the brake operation sensors 13a, 13b, 13c, signals from a wheel speed sensor (not shown), and signals from a wheel behavior sensor (not shown). A plurality of motor controllers 12A, 12B based on a signal, a signal from another controller (not shown), or the like.
Control signals such as a braking force command including anti-lock brake control (ABS control) and vehicle behavior control (VDC control) are output to the motor controller 12.
A and 12B control the electric brake 1 based on the control signal.
1a to 11d are controlled.

Next, the operation when a failure occurs will be described for each case.

"When the brake operation sensor 13a fails" When the brake operation sensor 13a fails, the main controller 14 receives signals from the remaining brake operation sensors 13b and 13c.
Based on the signal output to the main controller 1
4 outputs a control signal such as a braking force command to the motor controllers 12A and 12B. Thereby, the electric brake 11a
To 11d are controlled normally. That is, it is difficult for the main controller 14 to input the outputs of the plurality of brake operation sensors 13a to 13c when it is an output value from one brake operation sensor. This is because it is possible to recognize normality / abnormality by comparing these output values with the above-mentioned brake operation sensor.

"When the brake operation sensor 13b fails" When the brake operation sensor 13b fails, the main controller 14 receives signals from the remaining brake operation sensors 13a and 13c.
Based on the signal output to the main controller 1
4 outputs a control signal such as a braking force command to the motor controllers 12A and 12B. Thereby, the electric brake 11a
To 11d are controlled normally.

"When the brake operation sensor 13c fails" When the brake operation sensor 13c fails, the main controller 14 receives signals from the remaining brake operation sensors 13a and 13b.
Based on the signal output to the main controller 1
4 outputs a control signal such as a braking force command to the motor controllers 12A and 12B. Thereby, the electric brake 11a
To 11d are controlled normally.

"When the main controller 14 fails" When the main controller 14 fails, the brake controller 13a, 13b, 13c sends the motor controller 12
A, 12B, these motor controllers 12A, 12B
1d is controlled. At this time, the motor controller 12
Since signals from a wheel speed sensor (not shown), a wheel speed sensor (not shown), and the like are not input to A and 12B, only basic braking force control is performed. That is, ABS control and VDC control are not performed. However, if outputs from the wheel speed sensor and the vehicle behavior sensor are input to the motor controllers 12A and 12B, ABS control and V
It is also possible to perform DC control.

"When the motor controller 12A fails" When the motor controller 12A fails, the main controller 1 is controlled by the brake operation sensors 13a, 13b and 13c.
4, the main controller 14 outputs a control signal such as a braking force command to the remaining motor controller 12B. As a result, the two-wheel electric brakes 11c and 11d are controlled normally, and at least a minimum braking force can be secured. In addition,
At this time, it is also possible to perform different control with respect to the normal operation so as to generate a larger braking force than in the normal operation.

"When the motor controller 12B fails" When the motor controller 12B fails, the main controller 1 is controlled by the brake operation sensors 13a, 13b and 13c.
4, the main controller 14 outputs a control signal such as a braking force command to the remaining motor controller 12A. As a result, the two-wheel electric brakes 11a and 11b are controlled normally, and at least a minimum braking force can be secured. In addition,
At this time, it is also possible to perform different control for the normal operation so as to generate a larger braking force than in the normal operation.

"When the electric brake 11a fails" When the electric brake 11a fails, the brake operation sensor 13a,
The main controller 14 outputs a control signal such as a braking force command to the motor controllers 12A and 12B based on the signals output from 13b and 13c to the main controller 14. As a result, the remaining three electric brakes 11
Since b, 11c, and 11d are operated, at least the minimum braking force can be secured. At this time, it is also possible to perform different control with respect to the normal operation so as to generate a larger braking force than in the normal operation.

"When the electric brake 11b fails" When the electric brake 11b fails, the brake operation sensor 13a,
The main controller 14 outputs a control signal such as a braking force command to the motor controllers 12A and 12B based on the signals output from 13b and 13c to the main controller 14. As a result, the remaining three electric brakes 11
a, 11c and 11d are operated, and at least the minimum braking force can be secured. At this time, it is also possible to perform different control for the normal operation so as to generate a larger braking force than for the normal operation.

"When the electric brake 11c fails" When the electric brake 11c fails, the brake operation sensor 13a,
The main controller 14 outputs a control signal such as a braking force command to the motor controllers 12A and 12B based on the signals output from 13b and 13c to the main controller 14. As a result, the remaining three electric brakes 11
a, 11b, and 11d are activated, and at least a minimum braking force can be secured. At this time, it is also possible to perform different control for the normal operation so as to generate a larger braking force than for the normal operation.

"When the electric brake 11d fails" When the electric brake 11d fails, the brake operation sensor 13a,
The main controller 14 outputs a control signal such as a braking force command to the motor controllers 12A and 12B based on the signals output from 13b and 13c to the main controller 14. As a result, the remaining three electric brakes 11
As a, 11b and 11c are activated, at least a minimum braking force can be secured. At this time, it is also possible to perform different control for the normal operation so as to generate a larger braking force than for the normal operation.

"When battery 15A fails" Battery 15
In the case of the failure of the motor A, the brake operation sensor 13a and the motor controller 12A are in a state of failure, so that the main controller 14 is driven by the remaining motor based on signals output from the remaining brake operation sensors 13b and 13c to the main controller 14. A control signal such as a braking force command is output to the controller 12B. As a result, the remaining two electric brakes 11c and 11d are operated, and at least a minimum braking force can be secured. At this time, it is also possible to perform different control for the normal operation so as to generate a larger braking force than for the normal operation.

"When battery 15B fails" Battery 15
B, the brake operation sensor 13b and the motor controller 12B are in a state of failure, so that the main controller 14 is driven by the remaining motor based on signals output from the remaining brake operation sensors 13a and 13c to the main controller 14. A control signal such as a braking force command is output to the controller 12A. As a result, the remaining two electric brakes 11a and 11b are operated, and at least a minimum braking force can be secured. At this time, it is also possible to perform different control for the normal operation so as to generate a larger braking force than for the normal operation.

"When battery 15C fails" Battery 15
At the time of failure of C, since the brake operation sensor 13c and the main controller 14 are in a failure state, these motor controllers 12A, 12B are determined based on signals output from the remaining brake operation sensors 13a, 13b to the motor controllers 12A, 12B. Is the electric brake 1
1a to 11d are controlled. At this time, since signals from a wheel speed sensor (not shown) or a wheel speed sensor (not shown) are not input to the motor controllers 12A and 12B, only basic braking force control is performed. That is, ABS control and VDC control are not performed. However,
If the outputs from the wheel speed sensor and the vehicle behavior sensor are input to the motor controllers 12A and 12B, ABS control and VDC control can be performed.

At the time of the above failure, the driver can be notified of the failure, for example, by turning on a warning lamp (not shown).

Since the electric brake system according to the first embodiment includes the main controller 14 and the plurality of motor controllers 12A and 12B, even if a failure occurs in the main controller 14, the motor controller 12A and 12B enable backup related to control of the brake system.

Also, since the main controller 14 and the plurality of motor controllers 12A and 12B are individually provided with the batteries 15A to 15C, even if one of the batteries fails, the other batteries are connected to the other. The backup related to the control of the brake system can be performed with the selected controller.

Further, a plurality of brake operation sensors 11a
To 11c are connected to the individual batteries 15A to 15C. Therefore, even if one of the batteries fails, the backup of the control of the brake system can be performed by another battery and the brake operation sensor connected thereto. Become.

In addition, a plurality of brake operation sensors 11a
11c are output to the main controller 14 and the plurality of motor controllers 12A and 12B. Therefore, even if a failure occurs in the main controller, the motor controller can back up the control of the brake system. .

In the first embodiment, one brake operation sensor and one battery are connected in a one-to-one relationship for each of the three brake operation sensors. Two or three batteries may be connected in a one-to-many relationship. Further, one of the two brake operation sensors is connected to the battery in a one-to-one relationship, and the other is connected to the battery in a one-to-many relationship. Two batteries may be connected to one brake operation sensor in a one-to-many relationship, and one of the batteries may be shared by the two brake operation sensors. Even with such a configuration, it is possible to cope with a failure other than the failure of the brake operation sensor.

An electric brake system according to a second embodiment of the present invention will be described below with reference to FIG. 2, focusing on differences from the electric brake system according to the first embodiment. The same parts as those of the electric brake system according to the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this electric brake system, three brake operation sensors 13a, 13b, 13c
It comprises a brake operation switch for detecting ON / OFF of the operation of the brake pedal 1 and a brake operation amount sensor for detecting an operation amount (a pedaling force amount or a stroke amount) of the brake pedal 1. That is, the brake operation sensor 13
a comprises a brake operation switch 20a and a brake operation amount sensor 21a, and the brake operation sensor 13b
Brake operation switch 20b and brake operation amount sensor 2
1b, and the brake operation sensor 13c includes a brake operation switch 20c and a brake operation amount sensor 21c.

Here, all of the above-mentioned brake operation sensors 13a, 13b, 13c are connected to individual batteries 15A, 15B, 15C, respectively. That is, the battery 15A is supplied to the brake operation switch 20a and the brake operation amount sensor 21a constituting the brake operation sensor 13a so as to supply power to each of them.
However, a battery 15B is supplied to the brake operation switch 20b and the brake operation amount sensor 21b constituting the brake operation sensor 13b so as to supply power to each of them.
However, a battery 15C is supplied to the brake operation switch 20c and the brake operation amount sensor 21c that constitute the brake operation sensor 13c so as to supply power to each of them.
Are connected respectively.

The detection signals of all the brake operation switches 20a, 20b, 20c and the brake operation amount sensors 21a, 21b, 21c are output to the main controller 14 and all of the plurality of motor controllers 12A, 12B. ing. That is,
The detection signal of the brake operation switch 20a is transmitted to the main controller 14 and the plurality of motor controllers 12A,
12B, the brake operation amount sensor 21a
Is output to the main controller 14 and the plurality of motor controllers 12A and 12B, and the detection signal of the brake operation switch 20b is output to the main controller 14 and the plurality of motor controllers 12A and 12B.
2B, the detection signal of the brake operation amount sensor 21b is output to the main controller 14 and the plurality of motor controllers 12A and 12B, and the detection signal of the brake operation switch 20c is output to the main controller 14 and the plurality of motor controllers. Controllers 12A, 12
B, and the detection signal of the brake operation amount sensor 21c is output to the main controller 14 and the plurality of motor controllers 12A and 12B.

During normal operation, as described above, the main controller 14 controls the signals from all the brake operation switches 20a, 20b, 20c and the brake operation amount sensors 21a, 21b, 21c, and the signals from the wheel speed sensors (not shown). The plurality of motor controllers 12A, 12B based on signals, signals from wheel behavior sensors (not shown), and signals from other controllers (not shown).
Control signals such as a braking force command including anti-lock brake control (ABS control) and vehicle behavior control (VDC control) are output to the motor controller 12.
A and 12B control the electric brake 1 based on the control signal.
1a to 11d are controlled.

Here, in this electric brake system,
The brake operation amount sensor 21a is corrected based on the detection signal of the brake operation switch 20a,
The brake operation amount sensor 21b is corrected based on the detection signal of the brake operation switch 20b,
Further, the brake operation amount sensor 21c is corrected based on the detection signal of the brake operation switch 20c. More specifically, the zero point correction is performed so that the detected value of the brake operation amount sensor 21a at the time when the detection signal of the brake operation switch 20a changes from OFF to ON is used as data of zero operation amount, and the brake operation switch 20
The zero point correction is performed by setting the detection value of the brake operation amount sensor 21b at the time when the detection signal of b to the ON state from OFF to the data of the operation amount of zero, and the detection signal of the brake operation switch 20c is changed from OFF to ON. Then, the zero point correction is performed using the detection value of the brake operation amount sensor 21c at the time when the operation amount becomes zero.

In addition, in this electric brake system, a warning lamp (warning means) for warning a system abnormality is provided.
23, and a plurality of motor controllers 12A,
12B and a plurality of batteries 15A, 15B, and 15C respectively provided in the main controller 14 include diodes 24a, 24b,
24c are all connected. That is, the battery 15A is connected to the warning lamp 23 via the diode 24a, the battery 15B is connected via the diode 24b, and the battery 15C is connected via the diode 24c. As a result, a plurality of batteries 15
A, 15B, and 15C can supply power. Further, the warning lamp 23 includes a main controller 14 and a plurality of motor controllers 12A,
12B, and can be driven by any of these controllers 14, 12A, and 12B.

Next, the operation when a failure occurs will be described for each case.

"When the brake operation switch 20a or the brake operation amount sensor 21a of the brake operation sensor 13a fails" When the brake operation switch 20a or the brake operation amount sensor 21a of the brake operation sensor 13a fails, the remaining brake operation sensors 13b and 13c are used. The main controller 14 is controlled by the motor controller 12A,
A control signal such as a braking force command is output to 12B. Thus, the electric brakes 11a to 11d are controlled normally.

"When the brake operation switch 20b or the brake operation amount sensor 21b of the brake operation sensor 13b fails" When the brake operation switch 20b or the brake operation amount sensor 21b of the brake operation sensor 13b fails, the remaining brake operation sensors 13a and 13c are operated. The main controller 14 is controlled by the motor controller 12A,
A control signal such as a braking force command is output to 12B. Thus, the electric brakes 11a to 11d are controlled normally.

"When the brake operation switch 20c or the brake operation amount sensor 21c of the brake operation sensor 13c fails" When the brake operation switch 20c or the brake operation amount sensor 21c of the brake operation sensor 13c fails, the remaining brake operation sensors 13a and 13b are used. The main controller 14 is controlled by the motor controller 12A,
A control signal such as a braking force command is output to 12B. Thus, the electric brakes 11a to 11d are controlled normally.

"When the main controller 14 fails"
“At the time of failure of the motor controller 12A”, “At the time of failure of the motor controller 12B”, “At the time of failure of the electric brake 11a”, “At the time of failure of the electric brake 11b”, “At the time of failure of the electric brake 11c”, and “At the time of failure of the electric brake 11d”. At the time of failure "," at the time of failure of battery 15A "," at the time of battery 15B
"When the battery 15C fails" and "when the battery 15C fails" are the same as in the electric brake system according to the first embodiment.

By turning on the warning lamp 23 at the time of each of the above failures, the driver can be made aware of the failure. Here, “Battery 15
In any of "at the time of failure of A", "at the time of failure of battery 15B", and "at the time of failure of battery 15C", the warning lamp 23 can be driven by one of the batteries 15A to 15C other than the failure. The warning lamp 23 can be normally turned on.

It is to be noted that, instead of one warning lamp 23, a plurality of warning lamps 23 or different colors may be provided according to the purpose.
It is also possible to replace with a voice generating device (warning means) for generating a warning sound, or to combine a warning lamp and a voice generating device.

The electric brake system according to the second embodiment has the same effects as the electric brake system according to the first embodiment, and also has the following effects.

Since power can be supplied to the warning lamp 23 from any of the plurality of batteries 15A, 15B, and 15C, even if a failure occurs in any of the batteries 15A, 15B, and 15C, power can be supplied from another battery. The warning lamp 23 can be driven.

The brake operation amount sensor 21a can be corrected based on the detection signal of the brake operation switch 20a for detecting ON / OFF of the brake pedal 1, and the brake operation amount sensor 21b can be corrected based on the detection signal of the brake operation switch 20b. Can be corrected, and the brake operation amount sensor 21c can be corrected based on the detection signal of the brake operation switch 20c.

[0060]

According to the electric brake system according to the first aspect of the present invention, since the electric brake system includes the main controller and the plurality of motor controllers, even if a failure occurs in the main controller, the brake system is used by the motor controller. Backup of the control of the brake system becomes possible, and the reliability of the brake system is improved. Also, since the main controller and the plurality of motor controllers are individually provided with batteries, even if one of the batteries fails, the other batteries and the controller connected thereto control the brake system. Backup becomes possible, and the reliability of the brake system is improved.

According to the electric brake system of the present invention, since the main controller and the plurality of motor controllers are provided, even if a failure occurs in the main controller, the motor controller controls the brake system. Backup, and the reliability of the brake system is improved. Also, since the main controller and the plurality of motor controllers are individually provided with batteries, even if one of the batteries fails, the other batteries and the controller connected thereto control the brake system. Backup becomes possible, and the reliability of the brake system is improved. Furthermore, since a plurality of brake operation sensors are connected to individual batteries, even if one of the batteries fails, the backup related to the control of the brake system is performed by another battery and the brake operation sensor connected thereto. Possible, and the reliability of the brake system is improved.

According to the electric brake system of the present invention, since the detection signals of the plurality of brake operation sensors are output to the main controller and the plurality of motor controllers, a failure occurs in the main controller. Even if the motor controller can back up the control of the brake system, the reliability of the brake system is improved.

According to the electric brake system of the fourth aspect of the present invention, the warning means can be supplied with power from any of the plurality of batteries. The warning means can be driven by the power supply from the controller.

According to the electric brake system of the present invention, the brake operation amount sensor for detecting the operation amount of the brake pedal based on the detection signal of the brake operation switch for detecting ON / OFF of the brake pedal is provided. Can be corrected.

[Brief description of the drawings]

FIG. 1 is a block diagram schematically showing an electric brake system according to a first embodiment of the present invention.

FIG. 2 is a block diagram schematically showing an electric brake system according to a second embodiment of the present invention.

[Explanation of symbols]

 11a to 11d Electric brake 12A, 12B Motor controller 13a to 13c Brake operation sensor 14 Main controller 15A to 15C Battery 20a to 20c Brake operation switch 21a to 21c Brake operation sensor 23 Warning lamp (warning means)

Claims (5)

[Claims] A plurality of electric brakes driven by electric motors; a plurality of motor controllers for controlling electric motors of the electric brakes; a main controller for outputting control signals to the plurality of motor controllers; An electric brake system comprising: a battery separately provided in each of a motor controller and the main controller; and at least one brake operation sensor that detects an operation input to a brake pedal and is connected to the plurality of batteries. 2. A plurality of electric brakes driven by an electric motor, a plurality of motor controllers for controlling the electric motors of the electric brakes, a main controller for outputting a control signal to the plurality of motor controllers, An electric brake comprising: a battery separately provided in each of a motor controller and the main controller; and a plurality of brake operation sensors which detect an operation input to a brake pedal and are connected to one of the different batteries. system. 3. The electric brake system according to claim 1, wherein detection signals of the plurality of brake operation sensors are output to the main controller and the plurality of motor controllers. 4. The apparatus according to claim 1, further comprising a warning unit for warning a system abnormality, wherein the warning unit can be supplied with power from any of the plurality of batteries. Electric brake system. 5. The brake operation sensor according to claim 1, wherein each of the plurality of brake operation sensors comprises a brake operation switch for detecting ON / OFF of a brake pedal and a brake operation amount sensor for detecting an operation amount of the brake pedal. The electric brake system according to any one of claims 1 to 4, wherein the brake operation amount sensor is corrected based on a signal.