A variable magnetization machine control system comprising a controller configured to generate a reversely rotating d-axis/q-axis current vector trajectory during a change in a magnetization state of a variable magnetization machine to drive the variable magnetization machine at a predetermined speed while maintaining the driving voltage below a predetermined maximum magnitude.

A vehicle includes a traction motor having resonance frequency zones, an inverter including switches arranged to drive the traction motor, and a controller. The controller operates the switches only within specified sets of carrier frequencies such that noise side bands corresponding to the carrier frequencies fall outside the resonance frequency zones.

A vehicle includes a traction motor having resonance frequency zones, an inverter including switches arranged to drive the traction motor, and a controller. The controller operates the switches only within specified sets of carrier frequencies such that noise side bands corresponding to the carrier frequencies fall outside the resonance frequency zones.

A vehicle includes a controller programmed to, responsive to injecting a high frequency voltage signal to an electric machine, determine an estimated negative sequence current phase associated with an electric machine current, and responsive to a rotor of the electric machine being at a predetermined rotor position, inject a pulse torque command to the electric machine and observe a speed change of the electric machine to determine a cable sequence.

A rotation electric machine controller includes: a torque command value acquisition section that acquires a torque command value for a rotation electric machine; and a setting section that sets a negative limit value limiting a d-axis current command value. The setting section sets the limit value having a larger absolute value in a case where the torque command value is large, in comparison to a case where the torque command value is small.

Provided is a traveling control device capable of appropriately controlling the turning and the speed of a traveling vehicle. A traveling control device of a traveling vehicle including a traveling control unit having a pair of left and right configurations capable of respectively driving a pair of left and right driving wheels includes: an instruction receiving portion that receives an operation instruction directed to each of the pair of left and right driving wheels; a speed instruction value calculation portion that calculates a speed instruction value that is to be instructed to the traveling control unit, based on each of the operation instructions; an operation instruction determination portion that determines, based on each of the operation instructions, whether the operation instruction is an operation instruction to rotate the pair of left and right driving wheels in the same direction as each other, or an operation instruction to rotate the pair of left and right driving wheels in different directions from each other; and a speed instruction value correction portion that corrects, if the operation instruction is an operation instruction to rotate the pair of left and right driving wheels in the same direction as each other, one of the speed instruction values calculated for the traveling control unit by the speed instruction value calculation portion, based on the other speed instruction value.

Provided is a traveling control device capable of appropriately controlling the turning and the speed of a traveling vehicle. A traveling control device of a traveling vehicle including a traveling control unit having a pair of left and right configurations capable of respectively driving a pair of left and right driving wheels includes: an instruction receiving portion that receives an operation instruction directed to each of the pair of left and right driving wheels; a speed instruction value calculation portion that calculates a speed instruction value that is to be instructed to the traveling control unit, based on each of the operation instructions; an operation instruction determination portion that determines, based on each of the operation instructions, whether the operation instruction is an operation instruction to rotate the pair of left and right driving wheels in the same direction as each other, or an operation instruction to rotate the pair of left and right driving wheels in different directions from each other; and a speed instruction value correction portion that corrects, if the operation instruction is an operation instruction to rotate the pair of left and right driving wheels in the same direction as each other, one of the speed instruction values calculated for the traveling control unit by the speed instruction value calculation portion, based on the other speed instruction value.

An electric power adjustment system includes a fuel cell connected to a load, and a multi-phase converter connected between the fuel cell and the load. The multi-phase converter is constituted of a plurality of phases and converts an output voltage from the fuel cell by a predetermined required voltage ratio. The electric power adjustment system includes a ripple current characteristic switching unit configured to switch a ripple current characteristic with respect to an input current to the multi-phase converter by changing at least one of a drive phase number and the voltage ratio of the multi-phase converter according to an operation state of the fuel cell and a required electric power of the load.

A method for controlling the operation of an electric machine, particularly an electric machine of a motor vehicle, wherein the electric machine is controlled to generate torque based on alternating current produced by a control device from a direct current supplied by an electrical energy storage. A function current which is determined depending on an actual operating point of the electric machine and which reduces a waviness of the direct current is impressed on the alternating current.

A method for controlling the operation of an electric machine, particularly an electric machine of a motor vehicle, wherein the electric machine is controlled to generate torque based on alternating current produced by a control device from a direct current supplied by an electrical energy storage. A function current which is determined depending on an actual operating point of the electric machine and which reduces a waviness of the direct current is impressed on the alternating current.