A control apparatus includes a drive instruction value generator configured to generate a first drive instruction value that is greater than or equal to 0, which corresponds to torque in a first rotation direction, for driving a first motor that applies the torque in the first rotation direction to a shaft, and a second drive instruction value that is less than or equal to 0, which corresponds to torque in a second rotation direction, for driving a second motor, which is different from the first motor, that applies the torque in the second rotation direction, which is an opposite direction to the first rotation direction, to the shaft.

A dual-drive device for sequential scanning includes a moving part comprising a frame and an optical instrument that is positioned on the frame and is rotatable about a first axis with respect to the frame so as to be slowed down or immobilized in a plurality of successive positions about the first axis, a motor configured to set the moving part in rotation about the first axis in a first direction of rotation at a constant speed, the moving part comprising a first actuator positioned on the frame and configured to actuate the rotation of the optical instrument about the first axis with respect to the frame in the first direction of rotation in order to pass from a first position to a successive position from the plurality of successive positions, and in a second direction of rotation, opposite to the first direction of rotation, in order to slow down or immobilize the optical instrument in the successive position.

A dual-drive device for sequential scanning includes a moving part comprising a frame and an optical instrument that is positioned on the frame and is rotatable about a first axis with respect to the frame so as to be slowed down or immobilized in a plurality of successive positions about the first axis, a motor configured to set the moving part in rotation about the first axis in a first direction of rotation at a constant speed, the moving part comprising a first actuator positioned on the frame and configured to actuate the rotation of the optical instrument about the first axis with respect to the frame in the first direction of rotation in order to pass from a first position to a successive position from the plurality of successive positions, and in a second direction of rotation, opposite to the first direction of rotation, in order to slow down or immobilize the optical instrument in the successive position.

A motor assembly includes a motor, a control circuit to generate a control signal, a motor driving circuit to cause a current to flow in the motor based on the control signal, a storage to store a first identifier uniquely identifying itself and a second identifier uniquely identifying another motor assembly within the communications network, and a communication circuit. The communication circuit transmits a data frame, in which the first identifier indicates a transmitting end, the second identifier indicates a receiving end, and a request are stored. The communication circuit receives from the other motor assembly a data frame including the second identifier indicating a transmitting end, the first identifier indicating a receiving end, and a request. In response the communication circuit transmits a data frame including the second identifier indicating a receiving end added thereto and the first identifier indicating a transmitting end added thereto.

A downhole electric submersible pump, with at least one pump unit having a pump inlet, and an electric motor system to power the pump, the electric motor system comprising an induction motor and permanent magnet motor. The induction motor and permanent magnet motor share a common power supply, connected in series.

A downhole electric submersible pump, with at least one pump unit having a pump inlet, and an electric motor system to power the pump, the electric motor system comprising an induction motor and permanent magnet motor. The induction motor and permanent magnet motor share a common power supply, connected in series.

A driving device for driving a first motor to transmit a driving force to a driven object and a second motor to transmit a driving force to the driven object include a controller and a corrector. The controller outputs a first voltage command value to drive the first motor and a second voltage command value to drive the second motor. The corrector corrects the first voltage command value and the second voltage command value, based on a parameter relating to driving of the first motor and the second motor obtained when an output torque of the first motor and an output torque of the second motor are applied to the driven object in opposite directions.

A dual-drive device for sequential scanning includes a moving part comprising a frame and an optical instrument that is positioned on the frame and is rotatable about a first axis with respect to the frame so as to be slowed down or immobilized in a plurality of successive positions about the first axis, a motor configured to set the moving part in rotation about the first axis in a first direction of rotation at a constant speed, the moving part comprising a first actuator positioned on the frame and configured to actuate the rotation of the optical instrument about the first axis with respect to the frame in the first direction of rotation in order to pass from a first position to a successive position from the plurality of successive positions, and in a second direction of rotation, opposite to the first direction of rotation, in order to slow down or immobilize the optical instrument in the successive position.

A drive system for a working machine with a working device which can be unloaded for starting, wherein the drive system comprises at least one main motor, which is designed as an electric machine, in particular as an asynchronous motor, and a motor shaft; an auxiliary motor, which is designed as an electric machine, in particular as an asynchronous motor; and a starting device for starting the auxiliary motor. The auxiliary motor is configured to start and/or accelerate the working machine, in particular up to a synchronous speed of the main motor.

A drive system for a working machine with a working device which can be unloaded for starting, wherein the drive system comprises at least one main motor, which is designed as an electric machine, in particular as an asynchronous motor, and a motor shaft; an auxiliary motor, which is designed as an electric machine, in particular as an asynchronous motor; and a starting device for starting the auxiliary motor. The auxiliary motor is configured to start and/or accelerate the working machine, in particular up to a synchronous speed of the main motor.