120results about "Wound field motor control" patented technology

A self-excitation motor disclosed by the present invention comprises a rotor, a first end of the rotor is equipped with a rectification circuit, the rotor comprises a rotor iron core and a plurality of harmonic windings and excitation windings, the rotor iron core is provided with rotor teeth, and each harmonic winding and each excitation winding are respectively wound on the corresponding rotor teeth. Each harmonic winding comprises a first harmonic winding and a second harmonic winding, the winding directions of the first harmonic winding and the second harmonic winding are the same, star connection is adopted, one ends of the first harmonic winding and the second harmonic winding are connected in series in a one-to-one mode, and the other ends of the first harmonic winding and the second harmonic winding are jointly connected to form a star neutral point; the other end of each second harmonic winding is connected with the midpoint of each bridge arm in the rectifying circuit in a one-to-one manner; the winding directions of the excitation windings on every two adjacent rotor teeth are opposite, and the two ends of each excitation winding are electrically connected with the direct current output end of the rectification circuit. This induces and rectifies the current for excitation more efficiently. The invention further provides a motor control strategy based on high-frequency harmonic current phase optimization.

An electric drive system includes an electric machine having a stator assembly and a rotor assembly. The stator assembly has a plurality of multi-phase stator windings, including a first stator winding and a second stator winding. A first inverter is adapted to feed the first stator winding. A second inverter is adapted to feed the second stator winding. The rotor assembly includes rotor windings having a single phase. A controller is configured to selectively command excitation of the rotor windings with a pulsed field current such that a direct-axis (d-axis) stator flux linkage is generated. A d-axis stator voltage is induced in the first stator winding and the second stator winding by the d-axis stator flux linkage. Pulsed power transfer is enabled through interaction of the d-axis stator voltage and respective d-axis winding currents in the first stator winding and the second stator winding.

The invention relates to an electrical traction network (1) for a motor vehicle, comprising a separately excited synchronous machine (2), a pulse-controlled inverter (3), a high-voltage battery (4), a DC / DC converter (6) and a charger (5), wherein the charger (5) has a mains connection (9) for an external AC voltage network, wherein the charger (5) is connected to AC voltage outputs of the pulse-controlled inverter (3) via first switching elements (S1), wherein the AC voltage outputs of the pulse-controlled inverter (3) are connected to the phases of the synchronous machine (2) via second switching elements (S2), wherein the DC voltage connections (HV+_PWR, HV-_PWR) of the pulse-controlled inverter (3) and an output of the DC / DC converter (6) are connected to the high-voltage battery (4) via third switching elements (S3), wherein the inputs of the DC / DC converter (6) are connected to the DC voltage connections (HV+_PWR, HV-_PWR) of the pulse inverter (3),wherein fourth switching elements (S4) are arranged between the output of the DC / DC converter (6) and two half-bridges of the DC / DC converter (6), wherein the DC / DC converter (6) is connected to a rotor winding of the synchronous machine (2) via fifth switching elements (S5), and a method for operating such an electrical traction network.

A control device is applied to a system including a power storage unit, a plurality of power converters, a rotating electric machine having windings electrically connected to each of the power converters, and a heat transfer unit that transfers heat generated in at least one of the power converters to a target to be heated. The control device includes a determination unit that determines whether there is a temperature increase request for a target to be heated, and a control unit that, when it is determined that there is a temperature increase request, performs switching control of each power converter so as to pass AC d-axis and q-axis currents through the windings while maintaining a rotor of the rotating electric machine in a stopped state from rotating.

The invention relates to a device for transferring the drive of a vehicle into a safe operating state, wherein the drive comprises an electric machine, in particular a synchronous machine, which is operated with electrical energy from an electrical energy store via an intermediate circuit and an inverter. The device is designed to determine, on the basis of an intermediate circuit voltage of the intermediate circuit, that a transfer procedure is to be carried out in order to transfer the drive into the safe operating state and, in response thereto, to bring about a freewheeling operation of the inverter in a freewheeling phase of the transfer procedure. The device is also designed to determine, on the basis of the intermediate circuit voltage, that the freewheeling operation of the inverter is to be ended and, in response thereto, to bring about a short-circuit operation of the inverter in a short-circuit phase of the transfer procedure, which short-circuit phase follows the freewheeling phase.

The embodiment of the present application provides a resonant power supply, a primary feedback excitation power supply controller and method, and a control device, which relate to the field of power supply technology and are used to simplify the secondary circuit of the rotary transformer in the process of controlling the current and voltage output by the rotary transformer. In the resonant power supply, the bridge circuit is electrically connected to the power supply, and the bridge circuit is used to convert the direct current provided by the power supply into a square wave signal according to the drive signal. The LC series resonant network is electrically connected to the bridge circuit and the primary winding, and the LC series resonant network is used to convert the square wave signal into alternating current and output it to the primary winding. The alternating current includes an input voltage V t and input current I r The rectifier bridge is electrically connected to the secondary winding and is used to convert the AC power on the secondary winding into DC power. The primary feedback excitation power supply controller is used to receive the input voltage V t and input current I r and outputs the above driving signal to the bridge circuit.

A control device (60) is applicable to a system including: a rotary electric machine (20) having armature windings (24U, 24V, 24W) and a field winding (22), a storage unit (10) that stores the driving power for the rotary electric machine, a first power converter (31) electrically connected to the armature windings and which controls the current flowing through the armature windings, and a second power converter (33) electrically connected to the field winding and controls the current flowing through the field winding. The control device includes a first control unit that performs switching control of the first power converter in a state in which an AC power supply (41) is electrically connected to the storage unit via the armature windings and the first power converter so that a current flows from the AC power supply to the power storage unit, and a second control unit that performs switching control of the second power converter so that torque of the rotary electric machine generated during switching control of the first power converter is reduced compared to when no current flows through the field winding.

An electric drive system includes an electric machine having a stator assembly and a rotor assembly. The stator assembly has a plurality of multi-phase stator windings including a first stator winding and a second stator winding. A first inverter is configured to power the first stator winding. A second inverter is configured to power the second stator winding. The rotor assembly includes single-phase rotor windings. A controller is configured to selectively command excitation of the rotor windings with a pulsed field current such that stator flux linkage is created in the direct axis (d-axis). A d-axis stator voltage is induced in the first stator winding and the second stator winding by the stator flux linkage in the d-axis.The interaction of the d-axis stator voltage and the corresponding d-axis winding currents in the first stator winding and the second stator winding enables pulsed power transmission.

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.

The present invention discloses a soft decoding processing system for motor rotation, a motor controller, and an electric vehicle. The system includes a main control chip, an excitation signal generation module, a sine-cosine signal acquisition module, a sine-cosine signal monitoring module, and a filtering module. The main control chip includes a control module and an operation monitoring module. The excitation signal generation module generates an excitation voltage according to the excitation control signal output by the control module. The control module analyzes the acquired sine-cosine induction signals to obtain the motor rotor angle and speed information. When the operation monitoring module determines that there is a fault in the acquired sine-cosine induction signals according to the first monitoring result, it verifies the first monitoring result based on the sine-cosine induction signals received by the control module, and triggers a safety action when the verification is correct. The system realizes the generation of the excitation voltage and the analysis of the sine-cosine induction signals based on the main control chip, improves the system performance, and further ensures the reliable operation of the motor through operation monitoring.

A boost circuit and method is described for supplying a boost voltage to a rotor of the electric machine, just as the electric machine is pulsed on, the boost voltage aids the rotor in quickly overcoming its start-up inductance, rapidly turn on the rotor. As a result, much faster transition times are realized each time the electric machine transitions from the off state to the on state at the start of a pulse. By reducing the transition time, the overall efficiency of the electric machine is significantly improved.

A wound-field rotating electric machine (40) includes: a stator (50) including a stator winding (52); and a rotor (60) having magnetic poles aligned in a circumferential direction and a field winding (70) provided for each of the magnetic poles. A controller (30) includes a control unit and an acquisition unit. The control unit controls a stator current through the stator winding and a field current through the field winding. The acquisition unit acquires a rotation parameter that indicates a rotation state of the rotor. When the rotor is in a high-rotation state in which a rotation speed of the rotor is higher than a predetermined rotation speed, the control unit controls the field current to be larger than in a state not being the high-rotation state, and controls the phase of the stator current to a field-weakening phase that weakens a field flux of the field winding.

Method for detecting a single permanently conductive defective semiconductor switch of the semiconductor switches (210, 340) of a semi-controlled H-bridge (100) for setting an excitation current of a separately excited synchronous machine, wherein the semi-controlled H-bridge (100) a bridge branch (200) with one of the semiconductor switches T1 (210) and a diode D3 (230) connected in series in reverse bias and a further bridge branch (300) comprising a further diode D2 (320) in reverse bias in series with a further semiconductor switch T4 (340) and a load branch (400) comprising an excitation winding (460) of the separately excited synchronous machine, wherein the load branch (400) connects a connection point (250) from one of the semiconductor switches T1 (210) and the diode D3 (230) in the first bridge branch (200) and with a further connection point (350) between the further diode D2 (320) and the further semiconductor switch T4 (340) in the further bridge branch (300), and wherein a current measuring device (480) for measuring the current excitation current is arranged in the load branch (400); wherein the semi-controlled H-bridge (100) is coupled to a control device (1200) comprising an excitation current control (1220) which generates two pulse-width modulated control signals (611, 621) of the same frequency, phase-shifted by half a period, for controlling one of the semiconductor switches T1 (210) and the other of the semiconductor switches T4 (340), such that the excitation current flowing through the load branch (400) can be controlled via the pulse-width modulation of the control signals (611, 621) according to a requirement, wherein a duty cycle in normal operation is limited to a range of 50% to 100%, wherein the duty cycle is a ratio of the temporal pulse width of a signal level (612, 622), which puts the correspondingly controlled semiconductor switch (210, 340) into a conducting state, to the period of the control signal (611, 621) and wherein the load branch (400) comprises a current measuring device (480) to measure the excitation current,which is used as a feedback signal by the excitation current control (1220), , the procedure includes the following steps: Detection of the excitation current and a target excitation current, Comparing the target excitation current according to the requirement with the excitation current measured and recorded by the current measuring device to determine a control deviation and Comparing the control deviation with a control deviation threshold and outputting an error signal if the control deviation exceeds the control deviation threshold. where a supply voltage U DC is detected, which is located at the semi-controlled H-bridge (100), and for this supply voltage U DC a standard duty cycle for a The target excitation current value is determined corresponding to the currently recorded measured excitation current value for a minimum possible load branch resistance value of the load branch (400), and an error signal is output if the currently set duty cycle is smaller than the determined standard duty cycle. or for the excitation current value measured at the currently set duty cycle and the A standard duty cycle range (1080) is determined from the measured supply voltage, which includes duty cycles that correspond to the currently measured excitation current value for various possible load branch resistances, and it is checked whether the currently set duty cycle is within the standard duty cycle range (1080), and a short-circuited semiconductor switch is detected if the currently set duty cycle is not within the determined standard duty cycle range (1080).

An electric motor rotor, comprising a plurality of wound field poles each having a single winding coil, a first group of wound field poles of a same field polarity, and a second group of wound field p

An excitation waveform determination device (100) sets an initial candidate solution group (IS) and a new candidate solution group (US) as one or a plurality of candidate groups of an excitation waveform based on a harmonic superimposition condition (HC) being information that specifies a harmonic to be superimposed on a fundamental wave included in the excitation waveform, executes an electromagnetic field analysis to calculate respective electromagnetic forces generated in a stator (320) when making the candidate solutions included in the one or plurality of set candidate solution groups of the excitation waveform flow through a motor (M), and determines the excitation waveform based on a result of the execution of the electromagnetic field analysis.

The invention relates to an assembly (12) for a converter (13) of a drive unit (10), and to a converter (13). The assembly (12) comprises a control and evaluation unit (38) and an excitation circuit (34). The excitation circuit (34) comprises an asymmetrical half-bridge (48), which has at least a first power switch (54A) and a second power switch (54B). The excitation circuit (34) has a first excitation line (60A) and a second excitation line (60B) for the drive unit (10). The first power switch (54A) is associated with the first excitation line (60A), and the second power switch (54B) is associated with the second excitation line (60B). The excitation circuit (34) has an excitation filter (62), which has a first RC element (70A) coupled to the first excitation line (60A) and a second RC element (70B) coupled to the second excitation line (60B). The control and evaluation unit (38) is connected to the RC elements (70A, 70B) in such a way that a switch-on transient and / or a switch-off transient of the power switch (54A, 54B) associated with the respective excitation line (60A, 60B) can be tapped. The control and evaluation unit (38) is designed to detect a fault state on the basis of the tapped switch-on transient and / or switch-off transient.

The invention relates to a drive system (2) comprising: - an inverter (6) comprising a first input (14), a second input (16) and N outputs (18); - a rotating machine (8) comprising a stator, the windings of which are connected at the output to a common point (44), and a rotor (32) comprising at least one magnetic element (48) made of a material with adjustable magnetisation; - an output switching element (10) connected between the common point (44) and the second input (16); and - a control device (12) configured to, simultaneously, during a magnetising step: • control the output switching element (10) so that it is in an on state for a predetermined magnetisation time interval; and • control the inverter (6) to, during the magnetisation time interval, connect the first input (14) to at least one and at most N-1 output(s) (18).

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 electrical circuit device for operating an externally excited electrical machine includes an exciter circuit, an inverter circuit, a capacitor, and a support structure. The exciter circuit includes at least one exciter circuit module arranged on a first side surface of the support structure. The at least one exciter circuit module includes at least one direct current terminal that is connected directly to a terminal of the capacitor.

An apparatus for a drive for driving an externally excited synchronous motor. The apparatus includes means for performing the following. The apparatus causes the drive to operate in a primary operating mode for achieving unity power factor. The apparatus monitors stator flux linkage load angle, stator flux linkage and torque references. In response to the stator flux linkage load angle reference, in a steady state, reaching or exceeding a pre-defined maximum allowed stator flux linkage load angle for steady state operation, the apparatus causes the drive to operate in a stator flux assistance operating mode. In the stator flux assistance operating mode, an increased stator flux linkage for allowing operation with the pre-defined maximum allowed stator flux linkage load angle with unity or maximized sub-unity power factor is used as the stator flux linkage reference.

The present invention relates to a method of rotor current estimation of an electric machine (1), the electric machine (1) comprising a converter providing voltage to a primary side of a transformer, the method comprising: - a sampling step (32) in which a sample (34) is taken in the middle of a positive pulse (24) and a sample (36) is taken in the middle of a negative pulse (26) for each PWM period (22) of a voltage waveform (20) generated by the converter; - a balancing step (38) in which absolute current values (40, 42) corresponding to the samples (34, 36) are balanced; and an estimation step (44) in which a current value for the rotor current of the electric machine (1) connected to a secondary side of the transformer is estimated according to the balanced current values (40, 42).

To provide an electric machine with rectified rotor windings and a control method thereof.SOLUTION: An electric machine includes a stator defining multiple stator poles with associated stator windings configured to receive a stator current. The electric machine also includes a rotor defining multiple fixed rotor poles with associated rotor windings, the rotor defining a field excited by magnetic fields produced by the stator windings when receiving the stator current to produce relative motion between the rotor and the stator and, the rotor being maintained in synchronicity with the magnetic fields produced by the stator during operation of the electric machine. The electric machine also includes a rectification system configured control against an alternating current being induced in the rotor poles as the field is excited by magnetic fields produced by the stator windings when receiving the stator current.SELECTED DRAWING: Figure 8

The invention relates to an excitation current circuit (ES) for controlling the excitation of an excitation winding (EW), the circuit having two connections (A1, A2) for an excitation winding (EW) of an externally excited electric machine (EM), and two supply inputs (V+, V-). The excitation current circuit (ES) is also equipped with a first half bridge (H1) and a second half bridge (H2), the ends of which are connected to the supply inputs (V+, V-) and the connection points of which are connected to the connections (A1, A2). The first half bridge has a series circuit of a diode (D) and a first semiconductor switch (S1). The second half bridge has a series circuit of a second and a third semiconductor switch (S2, S3). The invention further relates to a correspondingly equipped control device (ST) and to a correspondingly equipped electric vehicle traction drive.

A wound-field rotating electric machine (40) includes: a stator (50) including a stator winding (52); and a rotor (60) having magnetic poles aligned in a circumferential direction and a field winding (70) provided for each of the magnetic poles. A controller (30) includes a control unit and an acquisition unit. The control unit controls a stator current through the stator winding and a field current through the field winding. The acquisition unit acquires a rotation parameter that indicates a rotation state of the rotor. When the rotor is in a high-rotation state in which a rotation speed of the rotor is higher than a predetermined rotation speed, the control unit controls the field current to be larger than in a state not being the high-rotation state, and controls the phase of the stator current to a field-weakening phase that weakens a field flux of the field winding.

An excitation current circuit (ES) for controlling the excitation of an excitation winding (EW) has two terminals (A1, A2) for an excitation winding (EW) of a separately excited electric machine (EM) and two supply inputs (V+, V-). The excitation current circuit (ES) is further equipped with a first half-bridge (H1) and a second half-bridge (H2), the ends of which are connected to the supply inputs (V+, V-) and whose connection points are connected to the terminals (A1, A2). The first half-bridge has a series connection of a diode (D) and a first semiconductor switch (S1). The second half-bridge has a series connection of a second and a third semiconductor switch (S2, S3). Furthermore, a correspondingly equipped control device (ST) and a correspondingly equipped electric vehicle traction drive are described.

A method of controlling an electric machine having separately excitable rotors and stators includes pulsing the electric machine and controlling the electric machine to an off state. Pulsing the electric machine includes generating magnetic flux in the rotor in two separate paths by simultaneously exciting the rotor with a direct current and the stator with a stator bias current. Pulsing the electric machine may also include terminating the stator bias current when a desired magnetic flux is generated in the rotor. Pulsing the electric machine may include applying stator flux to the stator such that the electric machine provides a pulse torque.

A resonant power supply, a primary-side feedback excitation power supply controller, a method, and a control apparatus are disclosed. In the resonant power supply, a bridge circuit is electrically connected to a power supply. The bridge circuit is configured to convert, based on a drive signal, a direct current provided by the power supply into a square wave signal. An LC series resonant network is electrically connected to the bridge circuit and a primary-side winding. The LC series resonant network is configured to convert the square wave signal into an alternating current, and output the alternating current to the primary-side winding. The alternating current includes an input voltage Vt and an input current Ir.

A control device (30) is applied to a system including a rotary electric machine (40) having a stator (50) having a stator winding (52) and a rotor (60) having a field winding (70). The control device includes an operation unit that operates a current flowing through the stator winding and a field current flowing through the field winding in order to control a torque of the rotary electric machine to a command torque, and a determination unit that determines whether the command torque increases suddenly. The operation unit increases a degree of excitation of the field winding during a predetermined period from when it is determined that the command torque suddenly increase until the torque of the rotary electric machine converges to the command torque, compared to the degree of excitation of the field winding during a period after the predetermined period.

The invention relates to an electric machine system having an electric machine and a switching device for exciting the electric machine, wherein the electric machine system comprises at least one disturbing vibration (1) having a corresponding disturbing frequency (f E ). The switching device can excite the electric machine at a switching time point (4) which depends on an adjustable switching frequency (f S ), wherein the switching frequency (f S ) of the switching device is adjusted in accordance with the power requirements to be achieved by the electric machine. The time point (4) of the switching device is also adjusted in accordance with at least one disturbing frequency (f E ) of the electric machine system.

The present invention proposes a brushless electric excitation synchronous motor coupled resonant excitation system winding mutual compensation structure, including a primary circuit and a secondary circuit; the primary circuit includes a first resonant compensation topology, a motor controller and a stator armature winding system; the secondary circuit includes a secondary receiving inductor, a second resonant compensation topology, a high-frequency rectifier unit and a rotor excitation winding; the first resonant compensation topology is connected to the stator armature winding system and is controlled by the motor controller; the secondary receiving inductor, the second resonant compensation topology, the high-frequency rectifier unit and the rotor excitation winding are connected in sequence. The present invention is aimed at a resonant coupled wireless excitation synchronous motor system. On the basis of reusing the stator armature winding as a transmitting inductor, the armature winding is reused again, and it is equally divided as a compensation inductor and a transmitting inductor in the resonant network topology to construct a dual-coupling system to achieve dual transmission and mutual compensation, thereby eliminating the external compensation inductor and reducing the system volume.