Abstract: A vehicle brake system (1) includes a first control device (10) and a second control device (11) that respectively include a master controller (30), a first sub-controller (40), and a second sub-controller (41) that are connected to one another. Each of the master controller (30), the first sub-controller (40), and the second sub-controller (41) includes a braking force calculation unit that calculates braking force of electric brakes (16a to 16d), and a determination unit that compares braking force calculation results of the controllers to determine whether itself is normal. The determination unit includes an output block section that blocks, when the determination unit determines that any one of the controllers is not normal, an output of the controller that is determined to be not normal.

Abstract: A highly reliable vehicle brake system that includes an electric brake and achieves redundancy at low cost is provided. A vehicle brake system (1) is provided to a wheel (Wa) of a vehicle (VB), and includes an electric brake (16a) provided with a motor (80), a driver (60) that drives the motor (80), and a first control device (10) provided with a master controller (30) and a first sub-controller (40) connected to each other. The electric brake (16a) is controllable by both the master controller (30) and the first sub-controller (40).

Abstract: Provided is a vehicle brake system equipped with an electric brake and which has high reliability and enables redundancy at low cost. This vehicle brake system 1 is equipped with a mutually connected master controller 30 and first and second sub-controllers 40, 41, and an output cut-off control unit 200. Each of the controllers includes: a braking force calculation section for calculating the braking force of the electric brake; a self-determination section for determining whether or not the controller itself is normal; and an other-determination section for comparing the braking force calculation results of the controllers to determine whether the other two are normal.

Abstract: A highly reliable vehicle brake system including an electric brake is provided. A vehicle brake system (1) includes electric brakes (16a to 16d) provided with motors (80 to 85), drivers (60 to 65) that drive the motors (80 to 85), and a control device that controls the drivers (60 to 65). The electric brake (16a) includes two motors (80 and 81), and the control device includes separate drivers (60 and 61) respectively corresponding to the two motors (80 and 81). The control device includes a first master controller (30) and a first sub-controller (40). The first master controller (30) controls the driver (61) corresponding to the motor (81), and the first sub-controller (40) controls the driver (60) corresponding to the motor 80.

Abstract: A battery system for supplying electric energy from a primary battery or a secondary battery to a load. This system includes a battery consisting of the primary battery or the secondary battery, an electric double layer capacitor for storing electric energy from the battery, a limiting resistor for limiting the electric energy supplied from the battery to the electric double layer capacitor, and a discharge controller for controlling the electric double layer capacitor. The discharge controller causes the electric double layer capacitor to discharge the electric energy to the load intermittently in predetermined cycles while charging the electric double layer capacitor. A discharging time for discharging the electric energy from the electric double layer capacitor to the load is shorter than a charging time for charging the electric double layer capacitor with electric energy. At this time, a discharge current is greater than a charge current.

Abstract: A solar cell system stores electric power generated by solar cells and supplies the electric power to a load. This system includes a solar cell assembly having a capacity for generating electric power in a quantity consumed by the load in one day, the quantity being determined from an estimated quantity of solar radiation available on a rainy or cloudy day, and an electric double layer capacitor having a storage capacity corresponding at least to the quantity consumed by the load in one day.