A magnetically de-coupled, separately controlled, electric machine assembly including a radial and one or more axial electric machines, each with rotors mechanically coupled to and arranged to directly drive a single shaft. Each of the electric machines are independently, but cooperatively, controlled by an inverter unit that includes one or more inverters. The axial and radial electric machines are contained in a single housing.

A magnetically de-coupled, separately controlled, electric machine assembly including a radial and one or more axial electric machines, each with rotors mechanically coupled to and arranged to directly drive a single shaft. Each of the electric machines are independently, but cooperatively, controlled by an inverter unit that includes one or more inverters. The axial and radial electric machines are contained in a single housing.

A system (11) for balancing at least one parameter to be balanced of an electric motor of a propulsion system (1), in particular of an aircraft, includes at least two electric motors (3, 4) and a propulsion member (2) driven in rotation by said electric motors. The balancing system is configured to calculate a correction of the speed setpoint (Corr_Cons_VI, Corr_Cons_V2) as a function of a correction factor (F1, F2) of the speed setpoint depending on a parameter (P1, P2) of the associated electric motor that is intended to be balanced and on a speed setpoint (Cons_VH) of the propulsion member (2).

In at least one embodiment, a system for a class 7 or 8 vehicle is provided. The system includes a first motor, a second motor, and a controller. The first motor is configured to generate torque for the vehicle. The second motor is configured to drive an engine of the vehicle such that the vehicle meets a desired speed as set forth by a driver. The controller is configured to drive at least one of the first motor and the second motor and to receive a first signal indicative of a speed of the vehicle. The controller is further configured to deactivate the first motor if the speed of the vehicle is greater than a predetermined speed limit.

A control apparatus includes a control unit that controls a first motor and a second motor. The control unit controls a rotation angle of a driven unit using one of the first motor and the second motor based on a direction of disturbance and controls, using the other of the first motor and the second motor, backlash removal from a decelerating unit configured to transmit an output of the first motor or the second motor to the driven unit.

Brushless direct current (BLDC) motors are becoming more common, such as in cars and other vehicles. Unreliable BLDC motors or control systems can lead to risk of people's safety. A redundant BLDC control system is provided to control two or more BLDC motors. A safety module controls an enabling switch in each of the motor drivers, so that in response to detecting a fault condition, a currently active BLDC motor is disabled and a redundant BLDC motor is enabled. A digital processor computes and transmits digital signals to all the motor drivers continuously and simultaneously, so that the transition from a currently active BLDC motor to a redundant BLDC motor is smooth and almost unnoticeable.

An actuator assembly comprising an output member rotatable about a center axis relative to a structure, a first actuator having a first stator fixed to the structure and a first rotor rotatable about the center axis relative to the first stator, a second actuator having a second stator coupled to the first rotor such that the second stator rotates about the center axis relative to the first stator with rotation of the first rotor about the center axis and having a second rotor rotationally coupled to the output member, a controller configured in a failure mode to drive one of the first actuator or the second actuator to selectively control the rotation of the output member about the center axis with an operational failure of the other of the first actuator or the second actuator.

An actuator assembly comprising an output member rotatable about a center axis relative to a structure, a first actuator having a first stator fixed to the structure and a first rotor rotatable about the center axis relative to the first stator, a second actuator having a second stator coupled to the first rotor such that the second stator rotates about the center axis relative to the first stator with rotation of the first rotor about the center axis and having a second rotor rotationally coupled to the output member, a controller configured in a failure mode to drive one of the first actuator or the second actuator to selectively control the rotation of the output member about the center axis with an operational failure of the other of the first actuator or the second actuator.

A mobile body includes axial gap motors, a multiplexing mechanism, an abnormality detection mechanism, and a blocking mechanism. The axial gap motors generate driving power to be supplied to at least one wheel. The multiplexing mechanism multiplexes the axial gap motors and couples the axial gap motors to the at least one wheel of the mobile body. The abnormality detection mechanism detects an abnormality in the axial gap motors. In a case where the abnormality is detected in a certain axial gap motor of the multiplexed axial gap motors, the blocking mechanism blocks supplying of driving power from the certain axial gap motor independently of the multiplexed axial gap motors other than the certain axial gap motor, and maintains supplying of driving power to the at least one wheel from the multiplexed axial gap motors other than the certain axial gap motor.

A mobile body includes axial gap motors, a multiplexing mechanism, an abnormality detection mechanism, and a blocking mechanism. The axial gap motors generate driving power to be supplied to at least one wheel. The multiplexing mechanism multiplexes the axial gap motors and couples the axial gap motors to the at least one wheel of the mobile body. The abnormality detection mechanism detects an abnormality in the axial gap motors. In a case where the abnormality is detected in a certain axial gap motor of the multiplexed axial gap motors, the blocking mechanism blocks supplying of driving power from the certain axial gap motor independently of the multiplexed axial gap motors other than the certain axial gap motor, and maintains supplying of driving power to the at least one wheel from the multiplexed axial gap motors other than the certain axial gap motor.