Abstract: A power module is provided that is configured to supply power to a load. The power module includes a current generator, a current rail, and a magnetic sensor. The current generator is configured to generate a current. The current rail is configured to receive the current and output the current from the power module. The current rail includes a first opening formed therethrough, and the current, while flowing along the current rail in an output direction, produces a magnetic field. The magnetic sensor is disposed in the first opening of the current rail, and is configured to generate a differential sensor signal based on the magnetic field impinging thereon. The current generator is further configured to regulate the current based on the differential sensor signal.

Abstract: A method for controlling an electric vehicle having a field winding type synchronous motor for providing a driving force, the field winding type synchronous motor that has a rotor having a rotor winding and a stator having a stator winding, by controlling a stator current flowing in the stator winding and a rotor current flowing in the rotor winding is provided.

Abstract: A compressor system for generating compressed air for a compressed air supply system in a vehicle. The compressor system includes a brushed direct current electric motor (BDC electric motor); a compressor configured to be driven by the BDC electric motor; and a control unit for controlling the BDC electric motor and allocated to the BDC electric motor so as to delimit an operating current of the electric motor. A free-running current path is allocated to the control unit, the free-running current path being configured to delimit the operating current of the electric motor in a variable manner. A switch controller is allocated to the control unit, the switch controller being configured to specify a switched-on time period (t_ON) and/or a switched-off time period (t_OFF) for the electric motor in a variable manner.

Abstract: A double virtual voltage vectors predictive torque control method without weighting factor for five-phase permanent magnet synchronous motor includes: obtaining the current component in the two-phase stationary coordinate system and the outputting voltage at k interval; one step delay compensation is performed to obtain the current component in the two-phase stationary coordinate system at k+1 interval; predicting the flux and torque of motor at k+1 interval; calculating the reference voltage vector needed by the motor at k+1 interval according to the deadbeat principle and selecting the first virtual voltage vector; selecting the second virtual voltage vector according to the voltage error tracking principle and calculating the duration of the first virtual voltage vector and the second virtual voltage vector respectively and then synthesizing the two vectors and outputting.

Abstract: A method for controlling a variable speed drive comprising Ni low-voltage power cells connected in series for each phase among multiple phases, i being a phase index. The method comprises repeating P iterations comprising: activating at least one cell of one or more phases and deactivating the other power cells of the variable speed drive, wherein the at least one activated cell is selected on the basis of predefined activation controls depending on an iteration index; and receiving at least one output voltage of the variable speed drive across the terminals of the electrical device for at least one phase. The method further comprises, at the end of the P iterations, determining, from the measured output voltages, values of rectified voltage at the output of respective rectification stages of the power cells, and storing the rectified voltages obtained, which are respectively associated with the power cells.

Abstract: Technical solutions are described for controlling operation of an inverter to manage voltage upon a direct current (DC) bus and regenerative power (current) provided to a battery. A control system and method are provided to control operation of an electric machine using a controller. More specifically, the controller is configured to calculate a current-based torque limit to satisfy a regenerative current limit, and a voltage-based torque limit to satisfy a voltage limit constraint of the DC bus. The controller is configured to calculate a torque limit to satisfy the regenerative current and voltage limits of the DC bus, and to command a plurality of switches within the inverter to generate a direct-axis current from the electric machine corresponding to a torque demand and according to the torque limit. The proposed system and method provide for motor current that exceed a demagnetizing current limit of the electric machine.

Abstract: An electric machine (21) having a stator (20) and having a rotor (29) rotatably mounted to the stator (20) is specified. The stator (20) comprises a stator winding (24), at least three teeth (23), and at least three grooves (22). In each case, one tooth (23) of the stator (20) is arranged between two grooves (22) along a circumference of the stator (20), and the stator winding (24) has at least three coils (25), wherein each of the coils (25) is wound around a tooth (23) of the stator (20), so that the stator winding (24) is a concentrated winding. In addition, the winding direction of all coils (25) is the same, each of the coils (25) is designed to be fed with its own phase current, and the stator (20) is designed to generate at least two rotary fields having different numbers of pole pairs independently of each other, in particular simultaneously. In addition, an activation unit (40) for the electric machine (21) and a method for operating an electric machine (21) are specified.

Abstract: Embodiments provide a multiaxial motor control system for controlling motors for a plurality of shafts included in a multiaxial machine, and including a plurality of motor control devices and a controller. The controller is connected with the motor control devices, and transmits a command signal to the motor control devices. Each motor control device includes a communication controller, a rotation controller, and a drive unit, and drives a motor of a corresponding shaft. The communication controller transmits and receives signals including the command signal, and determine whether the command signal is received normally. The rotation controller generates a torque command to operate the corresponding motor. The drive unit generates a drive voltage for electrification to drive the corresponding motor in accordance with the torque command. When a motor control device detects failure in reception, the motor control device outputs a torque command for braking torque to stop the corresponding motor.

Abstract: It is an object of the present invention to provide an encoder that is easier to use. An encoder 1 used in a numerical control device includes a signal generation unit configured to generate a digital signal, and a configuration information output unit configured to output configuration information that determines operation of the signal generation unit, in which the configuration information output unit includes a voltage level acquisition unit that acquires a voltage level to be input, a configuration information selection unit that selects configuration information according to the acquired voltage level among a plurality of types of configuration information, and a configuration information transmission unit that transmits the selected configuration information to the signal generation unit.

Abstract: A motor control apparatus (2) according to the present disclosure is configured to control motors (#1-#3), automatically acquire identification information of a plurality of encoders (#1-#5), the encoders (#1-#5) being configured to be connected in series under a control of the motor control apparatus (2) and to detect position information of the motors (#1-#3) or position information of a mechanical apparatus configured to be driven by the motors (#1-#3), and store the identification information and the motor control unit in a non-volatile memory (11) in association with each other.

Abstract: An operation controlling apparatus of a reciprocating compressor includes: a detector configured to detect a torque output by a motor of the reciprocating compressor, a rotation speed of the motor, a counter electromotive voltage of the motor, and a current applied to the motor; a controller configured to determine a mode switching time point for switching an operation mode of the reciprocating compressor based on the torque, the rotation speed, the counter electromotive voltage, and the current of the motor, and output a control signal for changing a wire ratio of the motor corresponding to the operation mode; and a driver configured to change the wire ratio of the motor based on the control signal and operate the reciprocating compressor in the operation mode among at least two operation modes.

Abstract: A magnetic pole initial position detection device includes: a direct-current excitation command generation section configured to generate a first command for causing a constant excitation current with a current phase fixed to a first phase to flow through the synchronous motor; a torque-zero determination section configured to determine whether a torque generated in the rotor of the synchronous motor is zero when the excitation current based on the first command flows through the synchronous motor; and a magnetic pole initial position acquisition section configured to acquire the magnetic pole initial position of the rotor of the synchronous motor on a basis of a rotor actual position at or near a point in time when the torque-zero determination section determines that the torque is zero; a number of pole pairs of the synchronous motor; and an excitation phase during direct-current excitation under the first command.

Abstract: A vehicle includes a battery, an electric machine, a rotor position sensor, an inverter, and a controller. The electric machine is configured to propel the vehicle. The electric machine has a stator and a rotor. The inverter is disposed between the battery and the electric machine. The inverter is configured to convert DC electrical power from the battery into AC electrical power. The inverter is configured to deliver the AC electrical power to the electric machine. The controller is programmed to adjust the offset position of the rotor position senor and control the torque of the electric machine based on the offset position of the rotor position sensor.

Abstract: An electric motor controller system for modulating requested motor torque via oscillating the instantaneous torque, including a bi-stable torque controller; a proportional-integral (PI) velocity controller a proportional-integral-differential (PID) position controller; and sinusoidal zero-velocity table mapping.

Abstract: A method, system, and apparatus for controlling and regulating operation of a permanent magnet rotary electric machine including a stator and a rotor includes determining a first reactive power term associated with the electric machine based upon voltage, and determining a second reactive power term associated with the electric machine based upon flux. A first motor temperature associated with the electric machine is determined based upon the first and second reactive power terms, and power output from the permanent magnet electric machine is controlled based upon the first motor temperature.

Abstract: A method for producing a control device for mechanically controlling a component. The control device may have a device housing including a motor accommodating space in which an electric motor is arranged. The electric motor may include a motor housing having a stator and a rotor, the rotor including a rotor shaft. The method may include selecting an electric motor from a plurality of electric motors each suitable for a specified application. Each of the plurality of electric motors may have a different respective axial motor length and may have a same respective motor cross section. Further, the method may include adapting the motor accommodating space to the respective axial motor length of the selected electric motor.

Abstract: In one aspect, a medium voltage power converter includes a plurality of slices each having: a transformer including a plurality of primary windings to couple to a utility source of input power and a plurality of secondary windings; and a plurality of power cubes coupled to the plurality of secondary windings, each of the plurality of power cubes comprising a low frequency front end stage, a DC link, and a high frequency silicon carbide (SiC) inverter stage to couple to a high frequency load or to a high speed machine.

Abstract: Systems and methods for robust control of a sensorless interior permanent magnet synchronous motor during severe operating conditions that causes motor parameter variation. A multi-model flux observer and a dynamic direct flux motor controller act in concert to generate driving commands. The flux observer transitions between providing flux-based rotor characteristic estimates based on different motor models. DHFI filtered currents can be utilized to obtain flux-based characteristic estimates using a motor magnetic model that are unaffected by motor parameter variations. The multi-model flux observer can be configured to transition between suitable estimation methods to reduce, minimize, or eliminate the effects of motor parameter variations.

Abstract: A power module is provided that is configured to supply power to a load. The power module includes a current generator, a current rail, and a magnetic sensor. The current generator is configured to generate a current. The current rail is configured to receive the current and output the current from the power module. The current rail includes a first opening formed therethrough, and the current, while flowing along the current rail in an output direction, produces a magnetic field. The magnetic sensor is disposed in the first opening of the current rail, and is configured to generate a differential sensor signal based on the magnetic field impinging thereon. The current generator is further configured to regulate the current based on the differential sensor signal.

Abstract: A method for detecting a stall condition of an electric motor. The method can include initiating an open-loop phase. During the open-loop phase, the method can include increasing a rotational speed of an electric motor and obtaining data indicative of a voltage associated with the electric motor while increasing the rotational speed of the electric motor. During the open-loop phase, the method can also include determining a difference between the voltage and a time varying target voltage and detecting a stall condition based at least in part on the difference between the voltage and the time varying target voltage. When a closed-loop condition is satisfied, the method can include initiating a closed-loop phase.