BRAKE CONTROL DEVICE FOR ELECTRIC VEHICLE
2 Assignments
0 Petitions
Accused Products
Abstract
A brake control device for an electric vehicle includes an instruction controller, a pattern generator, and comparators. The instruction controller generates an instruction signal for instructing a motor about electric brake force. The pattern generator generates a first pattern signal for changing over electric brake force to machine brake force and a second pattern signal obtained by shifting the first pattern signal by a predetermined frequency. One of the comparators outputs an electric-brake force pattern, which is the smaller one of the instruction signal and the first pattern signal. The other of the comparators outputs a notification signal when the second pattern signal becomes equal to or smaller than the instruction signal.
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Citations
6 Claims
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1-3. -3. (canceled)
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4. A brake control device for an electric vehicle, comprising:
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a motor controller that outputs a motor control signal for controlling at least one motor that drives the electric vehicle; an electric brake controller that outputs a brake-force signal indicating electric brake force generated by the motor, and a notification signal for notifying, at a defined time before, that an electric brake is to be released; and a machine brake controller that controls total force consisting of electric brake force and machine brake force based on the brake-force signal and the notification signal, wherein the electric brake controller includes an electric-brake-force instruction controller that generates an instruction signal for instructing the motor with respect to electric brake force; a comparison pattern generator that generates a first pattern signal for, while reducing electric brake force to zero at a closing speed of the electric brake, changing over the electric brake force to machine brake force, and a second pattern signal obtained by shifting the first pattern signal by a predetermined frequency to a side on which motor frequency increases; a first comparator that compares the instruction signal with the first pattern signal, and outputs, as an electric-brake force pattern, a smaller one of the instruction signal and the first pattern signal to the motor controller; and a second comparator that compares the instruction signal with the second pattern signal, and outputs, as the notification signal, a signal output at a timing when the second pattern signal becomes equal to or smaller than the instruction signal to the machine brake controller. - View Dependent Claims (5, 6)
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Specification