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US 8,525,451 B2Granted
Motor control device, electric power steering system, and vehicle steering system
AssigneeJtekt Corporation
InventorHiroshi Kitamoto
Life of this patent
Estimating the term…
Abstract
In a motor control device that is used for, for example, an electric power steering system or another vehicle steering system equipped with a motor, a relay circuit (40) that serves as a power supply breaker is provided in a power feed line (Lp2) of a pre-driver (22) of a circuit that is a component of the motor control device. The operation of the relay circuit (40) is controlled by a relay signal (S_rly) output from a microcomputer (21).
Claims12
A motor control device comprising:
- a driving circuit formed by connecting a plurality of switching elements;
- a motor control signal output device that outputs a motor control signal;
- a step-up circuit that steps up and outputs a power supply voltage;
- and
- a pre-driver that outputs a driving signal corresponding to the motor control signal to each of the switching elements based on the step-up voltage output by the step-up circuit, wherein
- the step-up circuit is provided in a power feed line of the pre-driver, the power feed line branching off from a power line that connects the driving circuit and a power supply, and wherein
- a power supply breaker is provided in the power feed line, the power supply breaker capable of being controlled to interrupt the power feed line so as to cut off energization.
4 more elements
Dependencies are inferred from the claim text.