A method for controlling a battery charger circuit of a vehicle. The method includes injecting a first current pulse between at least one line and a protective earth connection of the battery charger circuit. The method also includes measuring at least one line voltage value of at least one node of the battery charger circuit. The method also includes identifying a noise value by performing one or more operations on the battery charger circuit. The method also includes determining a protective earth connection impedance based on the at least one line voltage value and the noise value.

Pulsed control of electric motors, and more particularly, to selectively adjusting one or more of a pulsing frequency, an amplitude of the pulses and/or a duty cycle of the pulses for reducing Noise, Vibration and Harshness (NVH) while maintaining high levels of operating efficiency.

A vehicle capable of being externally charged, in which a vehicle-mounted power storage device is charged using electric power supplied from a charging cable external to the vehicle, an ECU executes a smart verification process for communicating with an electronic key located within a prescribed verification range and verifying whether the electronic key is an authorized user's key or not, when it is detected that a user has operated a switch for locking the charging cable. When smart verification is impossible, the ECU executes a noise suppression process caused by external charging, and executes the smart verification process during the noise suppression process. When it is determined by the smart verification process during the noise suppression process that smart verification is possible, the ECU switches a state of a lock mechanism of the charging cable.

Pulsed control of electric motors, and more particularly, to selectively adjusting one or more of a pulsing frequency, an amplitude of the pulses and/or a duty cycle of the pulses for reducing Noise, Vibration and Harshness (NVH) while maintaining high levels of operating efficiency.

A device for controlling vibrations generated by electric machines of a vehicle is provided. The vehicle includes a first electric machine unit for driving a first wheel and a second electric machine unit for driving a second wheel. The device is configured to operate the first electric machine unit depending on a first torque to be applied to the first wheel and to operate the second electric machine unit depending on a second torque to be applied to the second wheel. Furthermore, the device is configured to operate the first electric machine unit and the second electric machine unit in a manner coordinated to one another such that predefined target vibrations can be generated as a result of the superimposition of first vibrations caused by the operation of the first electric machine unit and second vibrations caused by the operation of the second electric machine unit.

An inverter system is provided such that the system includes a direct-current (DC) voltage supply electrically coupled with a DC link, a plurality of inverters, each electrically coupled with the DC link, a plurality of electric machines where each electric machine is electrically coupled with one of the inverters, and a controller coupled with each of the inverters. The controller can control carrier signals of the inverters such that the carrier signals are synchronized and interleaved at an angle (Θ) that is determined based on the waveform type of the carrier signals and the number of inverters in the system.

The invention relates to a method for ascertaining the backlash (40) of a gear (24) which is coupled to an electric machine (12) of a vehicle which has at least one electric machine (12). According to the method, at least the following steps are carried out: a) detecting the rotational speed of the at least one electric machine (12) during a driving intervention (80) and detecting rotational speed fluctuations produced therefrom, b) evaluating a high-frequency vibration (60) which is generated as a result of the gear (24) reaching a lower stop (54) in delay phases (56) and reaching an upper stop (50) when reversing the rotational direction in acceleration phases (58), c) filtering out high-frequency components from the high-frequency vibration (60) according to step b), wherein position information (42), relating to a corresponding rotational angle, from the rotational speed signal is saved in the event said components occur, and d) evaluating the distance between the upper stop (52) and the lower stop (54) and ascertaining the backlash (40) from the difference of the position information (42) between the upper stop (52) and the lower stop (54).

A vehicle control device includes a control unit configured to obtain information relating to a drive state of a vehicle, calculate a requirement torque, compute a first target torque, a second target torque, and an ideal change rate of a total torque of the first drive torque and the second drive torque, and at least control a magnitudes of the first drive torque and the second drive torque outputted from the first drive unit and the second drive unit. The control unit is configured to control the first drive unit to operate a first zero-cross process and control the second drive unit to operate a second zero-cross process after the first zero-cross process ends.

The present disclosure relates to a method for masking a first noise which is generated by a part of a motor vehicle under a certain triggering condition, wherein, to mask the first noise, at least one second noise is superimposed on the first noise, and wherein the first noise is generated by closing at least one main contactor assigned to a battery of the motor vehicle.

The invention relates to a method for ascertaining the backlash (40) of a gear (24) which is coupled to an electric machine (12) of a vehicle which has at least one electric machine (12). According to the method, at least the following steps are carried out: a) detecting the rotational speed of the at least one electric machine (12) during a driving intervention (80) and detecting rotational speed fluctuations produced therefrom, b) evaluating a high-frequency vibration (60) which is generated as a result of the gear (24) reaching a lower stop (54) in delay phases (56) and reaching an upper stop (50) when reversing the rotational direction in acceleration phases (58), c) filtering out high-frequency components from the high-frequency vibration (60) according to step b), wherein position information (42), relating to a corresponding rotational angle, from the rotational speed signal is saved in the event said components occur, and d) evaluating the distance between the upper stop (52) and the lower stop (54) and ascertaining the backlash (40) from the difference of the position information (42) between the upper stop (52) and the lower stop (54).