Motor drive device
AssigneeHitachi Astemo, Ltd.
InventorsMasao Fujimoto, Yuuichi Yanagisawa, Akira Ishii
Life of this patent
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Abstract
A stator (1B) has stator coils (U1, V1 and W1) of a first system and stator coils (U2, V2 and W2) of a second system, and the coils are supplied with power from inverter modules (21). A fuse module (22) has two fuse circuit elements (32) corresponding to respective systems. Phase lines of U, V and W of each fuse circuit element (32) are connected together at a neutral point (40), and a fuse (38) is interposed between the neutral point (40) and each coil. By supplying power to a heater (39) accommodated in the fuse circuit element (32) from a control terminal (34), the fuse (38) is blown out.
Claims5
A motor drive device which is structured integrally with an electric motor having a coil for each phase and drives and controls the electric motor, and which is configured so that a phase line of each phase including the coil for each phase is connected at a neutral point, the motor drive device comprising:
- a fuse circuit arranged between the coil of the phase line and the neutral point and configured to be able to cut off power supplied to the neutral point in response to a cut-off signal from a control circuit, wherein the fuse circuit is mounted on a fuse circuit board that is independent of a control circuit board mounting thereon the control circuit.
Dependencies are inferred from the claim text.