An apparatus transforms vehicle operator intentions to wheel propulsion controls using an operator interface, sensors, a torque budgeting circuit, at least four motor controllers, and a vehicle/operator personality profile store. The store provides instructions and parameters which control dynamic vehicle responsiveness and reflect an operator's personality. The instructions and parameters are accessible by an application programming interface (API). Vehicle characteristics may be recorded by operating the vehicle through a prescribed route or evolution. A revised performance profile of a vehicle can be installed when the vehicle is reconfigured. Performance of a vehicle is modified to mimic a different vehicle by installing a new software dynamic performance profile. The API enables an open architecture for developers to customize vehicle dynamics without cutting metal.

An apparatus for an electrically powered terrestrial vehicle applies electrical energy to front wheels and to rear wheels. A control system receives desired acceleration inputs and provides target torque requirements to a plurality of adaptive field-oriented motor control circuits. One or more three-phase alternating current synchronous motors receive voltage magnitude and voltage frequency to generate torque, which is applied through a reduction gear. One motor only may be powered during certain modes of operation.

In a diagnostic device and a diagnostic method for a motor unit of an electric vehicle, an oil degradation/others detection unit is provided which is configured to detect at least any one detection item of a contamination degree, a degradation degree, and an oil amount of an oil used for cooling a motor unit or a reduction gear unit during a non-traveling period when the vehicle is powered on. An abnormalities-time control unit is provided which is configured to send notice of abnormalities of an oil supply system or not permit start of rotation of the motor unit when a detection value detected by the oil degradation/others detection unit is out of a setting range.

Provided is a failure determination device including: a storage medium that stores a command capable of being read by a computer; and a processor connected to the storage medium, wherein the processor executes the command capable of being read by the computer, to thereby acquire rotation angle data indicating a rotation angle of a rotor, voltage phase data indicating a phase of a voltage applied to a rotating electrical machine, angular velocity data indicating an angular velocity of the rotor, direct-current voltage data indicating a direct-current voltage supplied to an inverter that supplies electric power to the rotating electrical machine, and current data indicating a current supplied to the rotating electrical machine, generate current expectation value data indicating an expectation value of the current supplied to the rotating electrical machine using the rotation angle data, the voltage phase data, the angular velocity data, and the direct-current voltage data, and determine, in a case where the inverter is controlled by one-pulse control, whether at least one of a signal line connected to a switching element and a conducting wire for supplying electric power to the rotating electrical machine has failed on the basis of the current expectation value data and the current data.

An electric vehicle includes a voltage converter, a temperature sensor, and a control unit. The voltage converter performs bidirectional voltage conversion between an output electric path and one or both of first and second batteries, while allowing switching of an operating mode between a serial operating mode in which the first and second batteries are connected in series relative to the output electric path, and a parallel operating mode in which the first and second batteries are connected in parallel. The temperature sensor detects a temperature of each battery. The control unit switches the operating mode of the voltage converter. When the temperature of one battery is equal to or larger than a predetermined upper threshold value A, or equal to or smaller than a predetermined lower threshold value B, the control unit switches the operating mode of the voltage converter to the parallel operating mode.

A wheel stability control system for an electric vehicle including an electric motor, a drive inverter, and an electronic control unit (ECU) including a computer readable, non-transitory memory (memory) and an electronic processing unit (EPU). The memory stores information including an optimal acceleration and deceleration curve and the electrical characteristics of the electric motor. The EPU calculates the electrical moment of the electric motor from inputs from the drive inverter and the electrical characteristics of the electric motor. The ECU compares the electrical moment and the angular speed of the motor with the optimal acceleration and deceleration curve, and if the acceleration or deceleration of the electric motor is out of a predetermined range when compared to the optimal acceleration and the optimal deceleration, it reduces the electrical moment applied by the electric motor.

A motor control device includes a motor drive circuit and a microcomputer that controls the drive circuit. The microcomputer generates a control signal on the basis of duty command values Du, Dv, and Dw to control the drive circuit. The microcomputer includes a dead time compensation section that corrects the duty command values Du, Dv, and Dw on the basis of dead time compensation values Ddu, Ddv, and Ddw. The dead time compensation section includes a basic compensation value computation section that computes a basic compensation value Dd as a fundamental value of the dead time compensation values Ddu, Ddv, and Ddw, and a filter section that performs a filtering process corresponding to a low-pass filter on the basic compensation value Dd. The dead time compensation section sets the dead time compensation values Ddu, Ddv, and Ddw on the basis of an output value α from the filter section.

An electric power supply system for a vehicle includes a first battery, a second battery connected in parallel with the first battery, a voltage sensor configured to detect a voltage value of the second battery, a current sensor configured to detect a current value of the second battery, an electronic control unit configured to make a voltage of the alternator fluctuate according to a predetermined voltage waveform, and calculate internal resistance of the second battery using the voltage value and the current value of the second battery respectively detected by the voltage sensor and the current sensor while the electronic control unit is making the voltage of the alternator fluctuate according to the predetermined voltage waveform.

A resistance calculation activator determines whether or not an electric car is stopped on the basis of a drive command signal and an external signal, and activates a resistance calculator if a powering command is input as the drive command when it is determined that the electric car is stopped. The activated resistance calculator computes, within a resistance calculation period, a resistance value of an AC motor that produces driving force for the electric car, on the basis of a d-axis voltage command value and a d-axis current value supplied to the AC motor.

A motor drive device includes: a converter; a power supply; a plurality of inverter units configured to convert DC to AC to drive a plurality of motors by upper arm switching elements connected between a capacitor and motor coils and lower arm switching elements connected between the capacitor and motor coils; a second switch configured to connect the capacitor to the earth; a current detector configured to measure current flowing between the capacitor and the earth; a voltage detector configured to measure the voltage across the capacitor; and, an insulation resistance detector configured to detect insulation resistance of the multiple motors based on the current and voltage measured in a condition that the switching element to which the motor coil to be measured is connected is turned on and the switching elements to which a motor coil other than the target for measurement is connected are turned off.