A dual actuated power pack (300) comprises a battery (104) and first (101) and second (102) electric motors, as well as a power generator (103). The first electric motor (101) is powered by the battery (104) and the second electric motor (102) by a grid (106). The first and second electric motors (101, 102) are mechanically coupled (108) with each other so that when said second electric motor (102) is powered, said second electric motor (102) actuates (109) said power generator (103) and said first electric motor (101) at the same time, whereupon the first electric motor (101) functions as a hi-power battery charger and recharge the battery (104) when said second electric motor (102) actuates (109) the power generator (103). When the second electric motor is not used, the first electric motor (101) is powered (104, 105), and the power generator (103) is actuated (108) by said first electric motor (101).

A system includes a mechanical load, a first electrical motor and associated motor drive and a second electrical motor and associated motor drive. The first electrical motor and the second electrical motor being configured to drive the mechanical load in parallel. Each electrical motor and associated motor drive have a respective position sensor configured to measure the output position of the mechanical load; and each motor drive comprises a respective controller configured to output a current demand for its associated motor based on a position error between a desired output position of the mechanical load and the measured output position of the mechanical load from its respective position sensor, and a feedback signal of its output current demand.

A system includes a mechanical load, a first electrical motor and associated motor drive and a second electrical motor and associated motor drive. The first electrical motor and the second electrical motor being configured to drive the mechanical load in parallel. Each electrical motor and associated motor drive have a respective position sensor configured to measure the output position of the mechanical load; and each motor drive comprises a respective controller configured to output a current demand for its associated motor based on a position error between a desired output position of the mechanical load and the measured output position of the mechanical load from its respective position sensor, and a feedback signal of its output current demand.

An electrical machine system with mechanically and electrically coupled sub-machines, which have common magnetic sections and common coils and are connected by way of mechanical transmission systems, wherein adjacent sub-machines have mutually opposed directions of rotation with equal rotational speeds, and the mechanical coupling is specified by a transmission functionality, which at the same time defines the transmission ratio of rotor speed to transmission output drive rotational speed.

An electrical machine system with mechanically and electrically coupled sub-machines, which have common magnetic sections and common coils and are connected by way of mechanical transmission systems, wherein adjacent sub-machines have mutually opposed directions of rotation with equal rotational speeds, and the mechanical coupling is specified by a transmission functionality, which at the same time defines the transmission ratio of rotor speed to transmission output drive rotational speed.

A robotic system is proposed whereby the system comprises drivers which integrate the power switches and communications electronics for communicating over power lines or wirelessly or over another shared communications channel. In a robotic system comprising such drivers, one or more central controllers communicate with at least one actuator driver across a communications channel, wherein the communications channel is subject to interference caused by an actuator, and wherein at least one of the communication and the operation of the actuators is modified in anticipation of interference occurring such that reliable communication can be assured.

A robotic system is proposed whereby the system comprises drivers which integrate the power switches and communications electronics for communicating over power lines or wirelessly or over another shared communications channel. In a robotic system comprising such drivers, one or more central controllers communicate with at least one actuator driver across a communications channel, wherein the communications channel is subject to interference caused by an actuator, and wherein at least one of the communication and the operation of the actuators is modified in anticipation of interference occurring such that reliable communication can be assured.

An example actuator control system includes an actuator, a plurality of motors configured to cooperatively operate the actuator, and a controller. The controller is configured to determine an output signal for controlling active ones of the motors during a current update cycle based on a first gain value, an integral contribution from the current update cycle, and an integral contribution from a preceding update cycle. The controller is configured to, based on a quantity of the motors that is active differing between the current and preceding update cycles, scale the integral contribution from the preceding update cycle for the output signal determination based on the first gain value and a second gain value from the preceding update cycle. A method of controlling a plurality of actuator motors is also disclosed.

In a method for operating a system with drives, which are mechanically coupled to one another, and with a higher-level computer, which is connected to the drives with the aid of a data-bus connection, and a system, a respective actual torque value is determined in each drive and transmitted to the higher-level computer, in particular using a data-bus connection. The higher-level computer determines for each drive a setpoint torque value allocated to this drive, the higher-level computer has controllers, and one of the controllers is allocated, in particular biuniquely, to each drive. The controller allocated to the respective drive controls the actual torque value of the respective drive to the setpoint torque value of the respective drive by determining a setpoint speed value allocated to the respective drive as the control value and transmits it to the respective drive, in particular with the aid of a data-bus connection. The respective drive has a controller in each case, to which the respective actual speed value, determined in the drive, of an electric motor of the drive is supplied and which controls this actual speed value to the respective setpoint speed value transmitted by the higher-level computer by setting the motor voltage or the motor current of the electric motor of the respective drive.

A variable speed accelerator is provided, including an electric driving device which generates a rotational driving force, and a planetary gear transmission device which changes the speed of the rotational driving force generated by the electric driving device and transmits the changed rotation driving force to a driving target, wherein a sun gear shaft forms an output shaft connected to the driving target, an internal gear carrier shaft forms a constant-speed input shaft, and a planetary gear carrier shaft forms a variable-speed input shaft, the electric driving device includes a variable-speed motor having a variable-speed rotor connected to a variable-speed input shaft of the transmission device, and a constant-speed motor having a constant-speed rotor connected to a constant-speed input shaft of the transmission device, the variable-speed rotor and the planetary gear carrier shaft are formed in a cylindrical shape centered on the axis and have a shaft insertion hole formed to pass therethrough in the axial direction, the constant-speed rotor is inserted through the shaft insertion hole, and the variable speed accelerator further includes a rotation rate sensor which measures a rotation rate of the transmitting gear, and a control device which performs vector control of the variable-speed motor based on the rotation rate measured by the rotation rate sensor.