Motor Driving Circuit, Motor Driving System, Electric Power Steering System, Electric Brake System, and Vehicle Driving System
2 Assignments
0 Petitions
Accused Products
Abstract
In order to provide a motor driving circuit in which a portion corresponding to a failed phase can be separated while miniaturization and lower costs are achieved, a motor driving circuit for driving a motor includes: a second driver circuit for driving a driver circuit which supplies a drive current corresponding to one phase of a multiphase motor having three or more phases, to the multiphase motor; and an electrical circuit which includes a plurality of electrical components and switches a connecting relation between the electrical components according to an operation mode designated from outside the motor driving circuit, thereby providing a circuit function corresponding to the operation mode.
9 Citations
27 Claims
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1-14. -14. (canceled)
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15. A motor driving circuit for driving a motor comprising:
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a second driver circuit for driving a driver circuit which supplies a drive current corresponding to one phase of a multiphase motor having three or more phases, to the multiphase motor; and an electrical circuit which includes a plurality of electrical components and switches a connecting relation between the electrical components according to an operation mode designated from outside the motor driving circuit, thereby providing a circuit function corresponding to the operation mode; wherein the electrical circuit includes an oscillation circuit which outputs an oscillation signal, a voltage-dividing resistor capable of switching a voltage division ratio, an arithmetic unit which compares a voltage divided by the voltage-dividing resistor with a predetermined reference voltage, a comparison circuit which compares a result of the comparison by the arithmetic unit with the output from the oscillation circuit, and a switching element which turns ON/OFF according to an output from the comparison circuit, and switches whether to use the output from the oscillation circuit or not, according to the operation mode, and thereby provides at least one of a switching regulator function and a linear regulator function as the circuit function corresponding to the operation mode. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification