Mitsubishi Electric Mobility Patente

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A motor control device according to the present disclosure includes an inverter circuit including a plurality of high-potential-side switching elements, a plurality of low-potential-side switching elements, and a plurality of current sensors, a power control unit configured to control the plurality of high-potential-side switching elements and the plurality of low-potential-side switching elements based on a duty value, and an abnormality detection unit configured, with respect to each phase of the plurality of phases, to detect an abnormality by comparing an offset current value detected by using the current sensor when the low-potential-side switching element is in a non-conductive state, with a first threshold value and to determine a failure based on the number of times the abnormality is detected, in which, when an abnormality is detected by the comparison, the abnormality detection unit causes the power control unit, with respect to a limit target phase including a phase in which the abnormality is detected, to generate a limiting duty value that limits the duty value of the limit target phase to be greater than or equal to a predetermined lower limit value and to perform duty limit processing that controls the high-potential-side switching element and the low-potential-side switching element based on the limiting duty value.

A motor control device according to the present disclosure includes an inverter circuit including a plurality of high-potential-side switching elements, a plurality of low-potential-side switching elements, and a plurality of current sensors, a power control unit configured to control the plurality of high-potential-side switching elements and the plurality of low-potential-side switching elements based on a duty value, and an abnormality detection unit configured to detect an abnormality by comparing a sum of current values of the plurality of phases detected by using the plurality of current sensors when the plurality of low-potential-side switching elements are in a conductive state, with a first threshold value and to determine a failure based on the number of times the abnormality is detected, in which the abnormality detection unit compares the sum of the current values with the first threshold value, for each first cycle that is a current value detection cycle, and, when the abnormality is detected by the comparison, causes the power control unit to generate a limited duty value that limits the duty value to be less than or equal to a predetermined upper limit value and to perform duty limit processing that controls the plurality of high-potential-side switching elements and the plurality of low-potential-side switching elements based on the limited duty value.

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A steering control device (11) includes a target steering torque setter (22) configured to set a target steering torque with respect to a steering system, and a steering torque controller (23) configured to control a steering assist torque required to cause a steering torque to follow the target steering torque based on a deviation between the target steering torque and the steering torque acting on the steering system, in which the target steering torque setter sets the target steering torque based on the steering torque and the steering assist torque when a vehicle is in a stopped state, the target steering torque based on the steering torque, the steering assist torque, a steering angle of the steering system, and a vehicle speed in a first vehicle speed range, and the target steering torque based on the steering angle and the vehicle speed in a second vehicle speed range.

An input/output device according to the present disclosure includes: a control constant holding unit configured to hold a first control constant corresponding to a first vehicle state value; a target characteristic setting unit configured to set a second target characteristic which is a target value of a control characteristic of the steering in a second vehicle state value different from the first vehicle state value; and a control constant calculation unit configured to calculate a second control constant corresponding to the second vehicle state value based on the first control constant and the second target characteristic and output the second control constant to the steering control device.

A rotating electrical machine according to the present disclosure includes a motor including a rotation shaft, a rotor fixed to the rotation shaft, a stator disposed outside the rotor, a winding wound around the stator, and a motor case accommodating the rotation shaft, the rotor, and the stator, a control unit configured to control the motor, and a housing that is disposed between the stator and the control unit in an axial direction along the rotation shaft and that has a shaft through-hole into which the rotation shaft is inserted, in which the control unit has a substrate on which a heat generation unit is mounted, the housing has a main body portion and a case attachment portion that protrudes from the main body portion toward a stator and that is attached to the motor case, the housing has a heat transfer surface that faces the substrate and that is disposed at a position of overlapping the heat generation unit in the axial direction, a heat dissipating member thermally connecting the heat transfer surface and the heat generation unit is provided between the heat transfer surface and the heat generation unit, and at least a part of the heat transfer surface is disposed at a position of overlapping the case attachment portion in the axial direction.

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An electric power steering control device that controls output torque of a motor, which outputs assist torque based on a steering torque signal from a torque sensor that determines steering torque applied to a steering wheel by a user, controls the output torque by using, as a current command corresponding to a command value of the output torque, a signal obtained by adding a correction signal obtained by causing the steering torque signal to pass through a second compensator to an assist torque signal approximately proportional to a compensated steering torque signal obtained by causing the steering torque signal to pass through a first compensator, and in each of the first compensator and the second compensator, at least two or more stages of low-order filters of which an order is 1 or 2 are connected in series.

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