On-vehicle motor control device
AssigneeDenso Corporation
InventorJirou Hayashi
Life of this patent
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Abstract
An on-vehicle motor control device includes a power switching circuit disposed on a circuit board to supply current from a battery to a motor, a microcomputer disposed on the same circuit board that controls the power switching circuit in a PWM control mode to minimize the difference between the current supplied to the motor and a preset current. The microcomputer decreases the preset current when the battery voltage is higher than an upper limit or when both the battery voltage and the voltage of the ignition key signal are higher than respective upper limits.
Claims6
A motor control device connected to a battery, said motor control device comprising:
- a circuit board;
- a power switching means, disposed on said circuit board for supplying current from the battery to a motor mounted in a vehicle;
- a control circuit, including a microcomputer and being disposed on said circuit board, for controlling said power switching means in a PWM control mode so that an amount of the current supplied to the motor can be equal to a preset amount of current,
- wherein said microcomputer decreases the preset amount of current when the voltage of the battery is higher than an upper limit.
A motor control device connected to a battery and an ignition key signal detecting circuit, said motor control device comprising:
- a circuit board;
- a power switching means, disposed on said circuit board for supplying current from the battery to a motor mounted in a vehicle;
- a microcomputer, disposed on said circuit board, for controlling said power switching means in a PWM control mode so that an amount of the current supplied to the motor can be equal to a preset amount of current,
- wherein said microcomputer decreases the preset amount of current when both the battery voltage and the voltage of the ignition key signal are higher than respective upper limits.
Dependencies are inferred from the claim text.