10results about "Wound field motor control" patented technology

Disclosed are systems and methods for motor control using optimal efficiency reference generation. An electronic controller can determine current values of a motor in a rotating reference frame. Each current value can be associated with a dimension of a set of dimensions of the rotating reference frame. The electronic controller can further determine flux linkage values for each dimension of the set of dimensions of the rotating reference frame based on the current values using an optimization cost function that accounts for motor speed, copper loss, and core loss. The electronic controller can further determine target flux linkage values for each dimension of the set of dimensions of the rotating reference frame. The electronic controller can then control a power switch network coupled between a power source and the motor based on the flux linkage values and the target flux linkage values.

A control unit (30) is applied to a system including: a rotary electric machine (40) that has a stator (50) including a stator winding (52) and a rotor (60) including a field winding (70); and an inverter (20). The rotary electric machine is configured such that when a high-frequency current flows through the stator winding, a voltage is induced in the field winding, and a field current flows through the field winding. The control unit includes: a switch control section (109) that performs switching control of the inverter such that a combined current of a high-frequency current and a fundamental current having a low frequency flows through the stator winding; an induced voltage calculation section (113, 122) that calculates an induced voltage generated in the stator winding when the switching control is performed and while the rotor rotates; and a field current calculation section (115, 119, 124) that calculates a field current flowing through the field winding based on the calculated induced voltage.

There is disclosed a rotating electrical machine drive device that controls a rotating electrical machine of a wound field type and includes: an inverter circuit that supplies plural-phase AC power to a stator coil wound around a stator core; a full bridge circuit that supplies electric power to a rotor coil wound around a rotor core; and a processing device that controls these circuits. In a stopped state of the moving body, the processing device supplies plural-phase AC power to the stator coil and simultaneously supplies to the rotor coil AC power that reduces or eliminates a reluctance torque generated in the rotor core due to the plural-phase AC power.

An electrically excited synchronous machine (1) has a stator (2) with a stator winding (3) and a rotor (5) with an excitation winding (6). A control unit (9) of the synchronous machine (1) operates the synchronous machine (1) with a torque (M) that is high during load phases (12) and considerably lower during load breaks (13) between load phases (12). The control unit (9) rotates the rotor (5) during the load phases (12) with a uniform direction of rotation for each load phase (12) and at a speed (n) above a minimum speed (nmin). Based on the rotational position (p) of the rotor (5), the control unit (9) determines a d-coordinate and a q-coordinate of a coordinate system defined by the rotational position (p) of the rotor (5). The d-coordinate corresponds to the direction of a flux caused by an excitation current (le) flowing in the excitation winding (6).The q-coordinate is oriented orthogonally to the d-coordinate in the coordinate system. Before a load phase (12), during the load break (13), the control unit (9) sets a q-current (Iq) to an initial value (Iqa). During the load phase (12), the control unit (9) regulates the q-current (Iq) to a maximum of twice the initial value (Iqa). At the latest at the beginning of the respective load phase (12), the control unit (9) activates a controller (17) which adjusts the d-current (Id) and the excitation current (le) during the respective load phase (12), but not the q-current (Iq). The tracking is carried out in such a way that an actual value (x) of the rotor (5) remains equal to a corresponding target value (x*) and the d-current (Id) and the excitation current (le) satisfy the relationship Id=−u¨⋅Ie+FXh⋅cosα.

A rotor assembly (6) adapted to form part of an arrangement (4) for converting power, the rotor assembly comprising: a rotor shaft (10) extending along a central axis (C), and configured to be rotatable thereabout, a set of rotor windings (12, 12') comprising at least two rotor windings (12, 12'), each rotor winding in the set of rotor windings surrounding the central axis and being rotationally fixed to the rotor shaft, the rotor assembly (6) further comprising an electrical transfer arrangement (14) adapted to be electrically connected to a source of electrical power (15) and configured to selectively feed electric power to each rotor winding in the set of rotor windings.

This utility model discloses an excitation system for an electrically excited synchronous motor in a passenger vehicle, comprising: an H-bridge main circuit module, including two sets of bridge arms, each set including an upper bridge arm and a lower bridge arm, both the upper and lower bridge arms including power semiconductor devices and diodes connected in anti-parallel; a drive module, including two sets of half-bridge drive circuits, each half-bridge drive circuit being connected to one set of bridge arms respectively, the half-bridge drive circuit including a drive chip and upper and lower bridge arm drive circuits, the primary side of the drive chip having a drive signal input terminal and an enable signal input terminal, the secondary side being connected to the input terminals of the upper and lower bridge arms respectively through the upper and lower bridge arm drive circuits; and a processor module, having drive signal and enable signal output terminals, the drive signal output terminal being connected to the drive signal input terminal, and the enable signal output terminal being connected to the enable signal input terminal. The excitation system for an electrically excited synchronous motor in a passenger vehicle of this utility model has the advantages of high integration, simple circuit structure, and low cost.

The application discloses a kind of multi-parameter fusion's direct-current brushless motor high-efficiency oxygen compression method and system, the method includes: obtaining the winding temperature parameter of direct-current brushless motor and the oxygen concentration parameter of oxygen production system output;The winding temperature parameter and oxygen concentration parameter are input into the system efficiency model pre-constructed and are fused to calculate, obtain the target motor speed of making system overall operation efficiency optimal;Control direct-current brushless motor to operate at the target motor speed;The system includes: parameter perception module, decision module and motor drive execution module.The application fuses motor thermal state and output gas quality double parameters, carries out real-time online optimization using embedded physical model, dynamically optimizes the operating point of system overall energy efficiency highest, effectively solves the problem of single optimization dimension of traditional method, significantly improves the operating efficiency and economy of oxygen generator under different working conditions, and has efficiency risk early warning and adaptive mute and other enhancement functions.

The invention relates to an electrically excited synchronous machine (1) comprising a stator (2) having a stator winding (3) and a rotor (5) having an excitation winding (6). A control device (9) of the synchronous machine (1) operates the synchronous machine (1) with a torque (M) which assumes a high value during load phases (12) and, during load pauses (13) between the load phases (12), assumes a value which is at least one order of magnitude lower than the minimum value (M1) of the torque (M) during the load phases (12). The control device (9) rotates the rotor (5) during the load phases (12) with a constant direction of rotation for each load phase (12) and at a rotational speed (n) above a minimum rotational speed (nmin). The control device (9) determines, on the basis of an angular position (p) of the rotor (5), a d-coordinate and a q-coordinate of a coordinate system defined by the angular position (p) of the rotor (5). The d-coordinate coincides with the direction of a flux generated by an excitation current (Ie) flowing in the excitation winding (6). The q-coordinate is oriented orthogonally to the d-coordinate in the coordinate system. Prior to a load phase (12), still during the load pause (13), the control device (9) adjusts a q-axis current (Iq) to an initial value (Iqa). During the load phase (12), the control device (9) regulates the q-axis current (Iq) to at most twice the initial value (Iqa). No later than at the start of each load phase (12), the control device (9) activates a controller (17) which, during each load phase (12), tracks the d-axis current (Id) and the excitation current (Ie), but not the q-axis current (Iq). Tracking is performed such that an actual value (x) of the rotor (5) remains equal to a corresponding setpoint value (x*), and the d-axis current (Id) and the excitation current (Ie) satisfy the relationship: Id = - ü x Ie + F / Xh x cos(α). While the q-axis current (Iq) is being adjusted, the control device (9) adjusts the

An electric machine is provided. A transformer comprises a magnetic coupling. A wound field synchronous machine comprises a rotor winding, a secondary circuit of the transformer electrically connected to the rotor winding, and a stator winding. The secondary circuit comprises a secondary winding, a rectifier electrically, a switch for switching voltage between the rotor winding and the rectifier in a first direction, and an energy storage arranged to store energy provided by the rectifier and the rotor winding and provide a voltage to the rotor winding in a second direction. A power converter is coupled between the power supply and the wound field synchronous machine. The power converter comprises a stator winding power supply arranged to provide multiple phase AC excitation to the stator winding and a primary circuit of the transformer comprising a primary winding arranged to provide AC power to the primary winding.

Externally excited synchronous machine with a stator (2) and a rotor (3) rotatably mounted on the stator (2), wherein the rotor (3) comprises a rotor winding (4) for providing a rotor magnetic field when the rotor winding (4) is energized, an active power converter (5) for energizing the rotor winding (4) and control electronics (6) for controlling the power converter (5), characterized in that the rotor (2) has an internal power supply means (7) which is electrically connected to both ends of the rotor winding (4) and is configured to reduce a rotor winding current flowing through the rotor winding (4), at least in a fallback operating mode of the synchronous machine (1), in order to energize the control electronics (6) via an operating voltage input (8) of the control electronics (6).