This disclosure describes at least embodiments of an aircraft monitoring system for an electric or hybrid airplane. The aircraft monitoring system can be constructed to enable the electric or hybrid aircraft to pass certification requirements relating to a safety risk analysis. The aircraft monitoring system can have different subsystems for monitoring and alerting of failures of a component, such as a battery pack, a motor controller, and/or a motors. The failures that pose a greater safety risk may be monitored and indicated by one or more subsystems without use of programmable components.

An apparatus includes a multi-channel DC bus assembly comprising a first channel and a second channel, a first electromechanical device coupled to a positive DC link of the first channel, and a second electromechanical device coupled to a positive DC link of the second channel. A first DC-to-AC voltage inverter is coupled to the positive DC link of the first channel and a second DC-to-AC voltage inverter is coupled to the positive DC link of the second channel. The apparatus further includes a bi-directional voltage modification assembly coupled to the positive DC link of the second channel and a first energy storage system electrically coupled to the first electromechanical device.

A power conversion apparatus includes a first inverter, a second inverter, a drive circuit to provide control signals turning on low-side switch elements in the first inverter to the low-side switch elements when a failure has occurred on a first inverter side, and provide control signals to turn on low-side switch elements in the second inverter to the low-side switch elements when a failure has occurred on a second inverter side, and a control circuit. When a failure has occurred on the second inverter side, a first power supply voltage generated on the first inverter side is supplied to the drive circuit, while when a failure has occurred on the first inverter side, a second power supply voltage generated on the second inverter side is supplied to the drive circuit.

A vehicle drive system includes: a power supply in which a battery and a capacitor are connected in series; a primary drive motor to which a voltage of the battery is provided; secondary drive motors to each of which a total voltage (Vin) of the battery and the power supply capacitor is provided; a charging circuit; and a control circuit that controls charging/discharging of the power supply. The control circuit operates switches SW1, SW2 of the charging circuit so as to control charging/discharging of the battery and the capacitor.

A power detecting device includes a vehicle driving system, a battery detecting module and a controlling module. A first stator winding and a second stator winding are synchronized and connected in parallel with each other. A first end of a first current sensor is coupled to a first-phase winding end of the first stator winding for measuring a first-phase current. A first end of a second current sensor is coupled to a second-phase winding end of the first stator winding for measuring a second-phase current. The battery detecting module is coupled to a first power supply for measuring a current signal and a voltage signal. A controller generates a first power according to the current signal and the voltage signal and generates a second power according to a plurality of data from a database. The controller compares the first power with the second power to generate a detecting result.

A method for operating an electrical circuit, wherein the electrical circuit includes a DC converter, an inverter and an electric machine, wherein the inverter is connected on the direct current side to the output of the DC converter and on the alternating current side to the electric machine, wherein the electric machine is operated using a torque specification and/or a rotational speed specification, wherein the level of the output voltage of the DC converter is set as a function of a current torque specification and/or a current rotational speed specification.

A system for providing electric motor control to a plurality of motor loads includes one or more motor controllers arranged to drive one or more of the loads, switching means configured to selectively provide electrical connections between the one or more motor controllers and the loads. and a controller arranged to configure the switching means to connect one or more of the motor controllers to one or more of the loads in response to a control signal. The number of motor controllers is less than the number of motor loads to be controlled.

A system for providing electric motor control to a plurality of motor loads includes one or more motor controllers arranged to drive one or more of the loads, switching means configured to selectively provide electrical connections between the one or more motor controllers and the loads. and a controller arranged to configure the switching means to connect one or more of the motor controllers to one or more of the loads in response to a control signal. The number of motor controllers is less than the number of motor loads to be controlled.

A motor drive system includes motor drive control devices supplying first and second powers to first and second coils, respectively. The first motor drive control device includes: a detector communication unit acquiring a mover movement detection value; a position and speed control unit generating a thrust command to cause the movement detection value to follow a time-series movement target value received from an external device; and a current control unit supplying, to the first coils, the first power to cause thrust generated on the mover to follow the thrust command, and generating data on third power to be supplied to the second coils and transmitting the data to the second motor drive control device when the mover moves from the first coil to the second coil. The second motor drive control device supplies the second power calculated using the data on the third power to the second coils.

The present disclosure relates to a motor driving circuit of an electronic parking brake system, which is configured to include a first motor and a second motor for releasing or applying a parking brake applied to different wheels, respectively; and a first ECU and a second ECU for controlling the driving of the first motor and the second motor, respectively, wherein the second ECU is prevented from intervening in the driving of the first motor and the second motor while the first ECU drives the first motor and the second motor, and controls the driving of the first motor and the second motor only when there is an abnormality in the first ECU.