A control circuit for a power converter that configures a system that is mounted to a vehicle and includes a rotating electric machine that has multiple phases and includes a rotor that is capable of transmitting power to and from a drive wheel, and the power converter that includes upper- and lower-arm switches that are electrically connected to phase windings of the rotating electric machine. The control circuit determines whether an abnormality has occurred in the system, determines whether the system has been started based on an output voltage of the insulating power supply, and performs short-circuit control to turn on an on-side switch that is either one of the upper- and lower-arm switches and to turn off an off-side switch that is the other of the upper- and lower-arm switches, in response to the system being determined to have been started, and the abnormality being determined to have occurred.

A dynamic safe state control circuit is disclosed that controls an electrical motor based on vehicle speed. A microcontroller or other processing device is configured to control an inverter system of an electrical motor. The dynamic safe state control circuit is configured to receive a first signal that corresponds to a speed of the electric motor. The circuit is configured to activate any one of a plurality of safe states in the inverter system based on the first signal and in response to a malfunction in the microcontroller.

According to one aspect, a lidar system is a lidar system which includes one set of mechanical, e.g., optical, components, and two or more sets of electrical and/or software components. The beams which are provided by the optical components are effectively alternated between a first and second sets of electrical and/or software components. The redundancy provided by the first and second sets of electrical and/or software components allows the lidar system to remain operational in the event that one set of electrical and/or software components becomes non-operational.

A control method and system to control a pair of electric motors driving a vehicle. The steps provided for are: determining, in a control cycle N and by means of a first processing core, for a first electric motor, a first electric current target based on a first torque or speed target; determining, in the control cycle N and by means of a second processing core, for a second electric motor, a second electric current target based on a second torque or speed target; controlling, in the control cycle N and by means of the first processing core, a first electronic power converter connected to the first electric motor so as to pursue the first electric current target; and controlling, in the control cycle N and by means of the second processing core, a second electronic power converter connected to the second electric motor so as to pursue the second electric current target.

A utility cart includes a stored energy device that can be in the form of a Lithium Ion battery pack. The battery pack can include a main power output useful to drive high voltage components as well as the electric motor for motive power. The battery pack can also include one or more auxiliary outputs useful to provide auxiliary power to various other components. The auxiliary outputs can be either low and/or high voltage outputs. An auxiliary DC/DC output can be used to step down high voltage of the Lithium ion battery pack to lower voltages. A motor controller supply can also be provided as an auxiliary output to provide some power to a motor controller.

To prevent incorrect information from being given to a driver regarding the estimation of a degradation state of a secondary battery. A diagnostic device (100) for diagnosing a battery (40) provided in an electric vehicle (10), includes an estimation unit (301) that estimates a degradation state of the battery (40); a derivation unit (302) that derives an index value indicating validity of data used for the estimation of the degradation state; and a notification unit (303) that notifies, when accuracy of an estimated value is determined to be low based on the index value, a cause of a decrease in the accuracy of the estimated value.

A safety switch input diagnosis device includes a circuit formed from a series connection of an emergency stop switch and a line having a resistor. A connection state of the emergency stop switch and failure modes of the lines are diagnosed on the basis of a voltage value at one end of the circuit. Consequently, an operation of the switch and failure modes of a circuit relating to the switch can be diagnosed.

A security strategy providing apparatus of a vehicle includes a communication circuit, a power controller, and at least one control circuit electrically connected to the communication circuit and the power controller. The at least one control circuit is configured to detect a connection of an external apparatus or an inflow of external data, and to block at least part of a function provided by the vehicle, at least part of power supplied by the power controller, or the at least part of the function and the at least part of the power, based on a detection result of the connection of the external apparatus or the inflow of the external data.

A control device includes a control circuit configured to control an inverter circuit that drives a motor by a plurality of switching elements coupled between DC buses, a first power supply system using a voltage source different from the DC buses as a power supply, a second power supply system using the DC buses as a power supply, and a switching circuit configured to switch a power supply system that supplies power to the control circuit from the first power supply system to the second power supply system when an abnormality in the first power supply system is detected. The control circuit continues control of the inverter circuit with a power consumption lower than that before the abnormality is detected in the first power supply system, when the abnormality is detected.

A drive system. The drive system includes a first partial drive system and a second partial drive system, each having at least one electric machine, at least one control electronics for controlling the at least one electric machine, an energy source and an energy source control unit for monitoring and controlling the energy source. The drive system includes a first drive control unit and a second drive control unit, the first drive control unit communicating with both the first partial drive system and the second partial drive system and being designed to control and monitor the drive system, and the second drive control unit communicating with both the first partial drive system and with the second partial drive system and being designed to assume the control and the monitoring of the drive system in a fault state of the first drive control unit.