A method for configuring a battery for operation of at least two N-phase electric machines, in which a battery includes a plurality of energy modules, and the energy modules each have at least one energy cell and at least two power switches. A respective N-phase electric machine is assigned a respective group of the plurality of energy modules, and the assignment is carried out in accordance with an estimation of a respective energy consumption of the respective N-phase electric machines on the basis of a respective load of the respective N-phase electric machines which load is to be assumed.

A fan control system according to the present disclosure includes a controller that selects a control mode from a plurality of control modes including a first mode and a second mode. The first mode is a control mode in which an electric signal is given to fan motor so that fan motor operates at the first rotation speed. The second mode is a control mode in which an electric signal is given to fan motor so that fan motor operates at a second rotation speed lower than the first rotation speed. The controller has a function of selecting the second mode in a period after the start of the fan motor and before the selection of the first mode.

A fan control system according to the present disclosure includes a controller that selects a control mode from a plurality of control modes including a first mode and a second mode. The first mode is a control mode in which an electric signal is given to fan motor so that fan motor operates at the first rotation speed. The second mode is a control mode in which an electric signal is given to fan motor so that fan motor operates at a second rotation speed lower than the first rotation speed. The controller has a function of selecting the second mode in a period after the start of the fan motor and before the selection of the first mode.

A method and a device for controlling an electric motor (9), in particular for moving an endodontic instrument. The device has a first sensor (8) and a control unit (2). The control unit (2) has a drive unit (4), a second sensor (6) and a processing unit (3). The processing unit (3) is configured to cause the endodontic instrument (7) to perform a sequence of movements (M1, M2). The sequence of movements (M1, M2) includes a continuous forward movement (M1) and at least one alternating movement (M2). The sequence may include an additional alternating movement (M3) and/or a reverse movement (M4). The number and order of movements to be performed in a sequence depends on a set of predefined threshold values reflecting the torque load applied to the instrument, as measured by one of the sensors.

A method and a device for controlling an electric motor (9), in particular for moving an endodontic instrument. The device has a first sensor (8) and a control unit (2). The control unit (2) has a drive unit (4), a second sensor (6) and a processing unit (3). The processing unit (3) is configured to cause the endodontic instrument (7) to perform a sequence of movements (M1, M2). The sequence of movements (M1, M2) includes a continuous forward movement (M1) and at least one alternating movement (M2). The sequence may include an additional alternating movement (M3) and/or a reverse movement (M4). The number and order of movements to be performed in a sequence depends on a set of predefined threshold values reflecting the torque load applied to the instrument, as measured by one of the sensors.

A monitoring system and a monitoring method for a planter includes a computer having an unit speed fusion module, a seeding flow rate monitoring module, and a decision module for theoretical rotation speed of a drive motor, a rotation speed deviation inference module, a controlling parameter tuning module, an adjusting module for rotation speed of a seeding shaft, a controlling module for rotation speed of seeding shaft and a positioning signal receiver fixed on a top of a cab for receiving a geographic position signal. The system monitors operating state parameters of the planter and accurately controls seed amount.

A monitoring system and a monitoring method for a planter includes a computer having an unit speed fusion module, a seeding flow rate monitoring module, and a decision module for theoretical rotation speed of a drive motor, a rotation speed deviation inference module, a controlling parameter tuning module, an adjusting module for rotation speed of a seeding shaft, a controlling module for rotation speed of seeding shaft and a positioning signal receiver fixed on a top of a cab for receiving a geographic position signal. The system monitors operating state parameters of the planter and accurately controls seed amount.

Disclosed are an apparatus and method for controlling a motor. An exemplary embodiment of the present disclosure provides an apparatus for controlling an operation of a motor, the apparatus including: a first motor control unit connected to a first winding part of the motor and configured to control the operation of the motor; and a second motor control unit connected to a second winding part of the motor and configured to control the operation of the motor, in which the first motor control unit turns on or off current paths formed between the first motor control unit and the motor by controlling switches included in the first motor control unit, and the second motor control unit turns on or off current paths formed between the second motor control unit and the motor by controlling switches included in the second motor control unit.

Disclosed are an apparatus and method for controlling a motor. An exemplary embodiment of the present disclosure provides an apparatus for controlling an operation of a motor, the apparatus including: a first motor control unit connected to a first winding part of the motor and configured to control the operation of the motor; and a second motor control unit connected to a second winding part of the motor and configured to control the operation of the motor, in which the first motor control unit turns on or off current paths formed between the first motor control unit and the motor by controlling switches included in the first motor control unit, and the second motor control unit turns on or off current paths formed between the second motor control unit and the motor by controlling switches included in the second motor control unit.

A method and power converter unit for operating a generator includes a rotatable shaft operably coupled with a source of rotational force, a rotor mounted to the rotatable shaft and having at least one rotor pole defining a rotatable direct axis, a stator encircling the rotor and having a set of stator windings, and a power output electrically coupled with the set of stator windings and operable in a power generating mode and a power absorption mode