A system generates haptic feedback in an electric vehicle. The system comprises a frame, an energy storage device, and a wheel rotatably coupled to the frame. A motor receives power from the energy storage device and provides torque to the wheel. A controller determines a first operational state of the electric vehicle and transmits a first torque signal to the motor to control the motor to transmit first torque levels to the wheel to propel the electric vehicle. The controller determines a second operational state of the electric vehicle and transmits a second torque signal to the motor assembly. The motor assembly transmits second torque levels to the wheel to generate haptic feedback. The second torque signal is based on the second operational state of the electric vehicle and a torque profile stored in the memory, where the torque profile defines an irregular-shaped periodic waveform (e.g., a heartbeat rhythm).

Systems and methods for storing energy for use by an electric vehicle are disclosed. Systems can include an electric vehicle battery pack including a rack configured to couple a plurality of independently removable battery strings to the vehicle, the battery strings configured to be selectively coupled in parallel to a vehicle power bus. The battery strings may include a housing, a plurality of electrochemical cells disposed within the housing, a circuit for electrically connecting the electrochemical cells, a positive high-voltage connector, a negative high-voltage connector, a switch within the housing, and a string control unit configured to control the switch. Each battery string can include a coolant inlet and a coolant outlet configured to couple with and sealingly uncouple from an external coolant supply conduit and an external coolant return conduit, and an auxiliary connector configured to couple with an external communications system and/or an external low-voltage power supply.

Drive unit for an electrical vehicle, which drive unit comprises an electric motor including a winding, comprising a winding terminal. The drive unit further comprises an inverter having an inverter housing, and an inverter circuit provided within the inverter housing. The inverter circuit comprising an inverter terminal, wherein the winding terminal and the inverter terminal are directly connected to each other.

The invention relates to a method (400) for regulating an electric machine (190), comprising at least one first filter (140) and at least one second filter (142, 144). The method has the steps of: ascertaining (410) a feedback variable (Idq); filtering (412) a specifiable GW matching variable (Idq*); ascertaining (414) the filtered feedback variable without fundamental components (IdqWo-Funda); filtering (416) the filtered feedback variable without fundamental components (IdqWo-Funda); ascertaining (418) a filtered feedback variable without harmonic components (IdqFunda); and energizing (480) at least one winding of the electric machine (190) on the basis of the filtered feedback variable without harmonic components (IdqFunda).

The invention relates to a method (400) for regulating an electric machine (190) comprising a harmonic regulator (100), wherein the harmonic regulator comprises an input transformer (110), a regulator (120), and an output transformer (130). The method has the steps of: ascertaining (410) a feedback variable (Idq); transforming (420) the feedback variable (Idq); ascertaining (430) a regulating deviation; ascertaining (440) an equalization variable (UHrmc*); back-transforming (450) the equalization variable (UHrmc*); and energizing (480) at least one winding of the electric machine (190) on the basis of the actuating variable (UdqHrmc*).

The invention relates to a method (400) for calibrating a controller of an electric machine (120). The method comprises the following steps: specifying (410) a first signal (S_1) for generating a sinusoidal phase current for energising a winding of an electric machine (120); superposing (420) the first signal (S_1) with a test signal (S_Test_i) in order to generate a harmonic oscillation with a predetermined excitation amplitude and/or phase position relative to the phase current, which harmonic oscillation superposes the phase current; detecting (430) a response signal (S_Antw_i), resulting from the superposition of the phase current and the harmonic oscillation, by means of a sensor (130); determining (450) a calibrated signal (S_kal) for generating a harmonic oscillation with a predetermined excitation amplitude and a phase position relative to the phase current on the basis of a determined minimum of a response plane (A_Antw); operating (460) the controller (110) of the electric machine (120) on the basis of the determined minimum

The invention relates to a rotating electrical machine with an external rotor having a permanent magnet assembly. The invention also relates to a stator of a rotating electric machine of this type. In order to increase the performance and/or reduce the weight and/or installation space, a permanent magnet assembly is provided having segments with changing magnetisation directions in such a way that the magnetic flow is increased over the inner casing surface of the hollow cylinder facing the stator and therefore in the air gap and it is reduced over the opposing outer casing surface. For the stator of a drive unit of this type, stator teeth of a trapezoidal shape are proposed, having an outwardly increasing tooth width, wherein a respective coil winding is arranged on the stator teeth.

A motor cooling structure, a drive assembly and a vehicle. The motor cooling structure includes: branch flow-channels (100), shell flow-channels (200), end cover flow-channels (300), a liquid inlet (201) and a liquid outlet (202). A plurality of the branch flow-channels (100) are circumferentially arranged on a stator (1) of a motor around an axis of the motor. The shell flow-channels (200) includes a liquid inlet flow-channel (211), shell long flow-channels and a liquid outlet flow-channel (212). The liquid inlet flow-channel (211), the plurality of shell long flow-channels and the liquid outlet flow-channel (212) are circumferentially arranged on a reducer shell (2) around the axis of the motor. The end cover flow-channels (300) includes end-cover long flow-channels, and a plurality of the end-cover long flow-channels are circumferentially arranged on a motor end cover (3) around the axis of the motor. The shell flow-channels (200), the plurality of branch flow-channels (100) and the end cover flow-channels (300) form a continuous total flow-channel. The liquid inlet (201) is disposed on the reducer shell (2), and is in communication with the liquid inlet flow-channel (211). The liquid outlet (202) is disposed on the reducer shell (2), and is in communication with the liquid outlet flow-channel (212). The motor cooling structure realizes immersion cooling of the motor and improves the cooling efficiency of the motor.

A magnetic field apparatus includes a main magnet that generates a magnetic field with respect to an armature, a member made of a soft magnetic material and disposed adjacent to an end surface of the main magnet on a side opposing the armature, an auxiliary magnet that increases a magnetic flux of a magnetic pole of the main magnet on the side opposing the armature and disposed adjacent to the main magnet and the member in a relative moving direction between the magnetic field apparatus and the armature, and a restricting part that restricts the magnetic flux of the main magnet passing through an end surface of the member along a third direction that is perpendicular to both a first direction in which the main magnet and the armature oppose each other, and a second direction corresponding to the relative moving direction between the magnetic field apparatus and the armature.

A power conversion device includes: an inverter that converts a DC voltage into an AC voltage and drives a synchronous motor; and a magnetic pole position correction unit that corrects an error in a magnetic pole position of a rotor from a rotation angle sensor of the synchronous motor. The magnetic pole position correction unit includes an actual current phase calculation unit that calculates a current phase from a current when three-phase lines are short-circuited during rotation of the synchronous motor and an ideal current phase calculation unit that calculates an ideal current phase based on a rotational speed of the rotor and a temperature of a stator, and corrects the magnetic pole position from a difference between outputs of the actual current phase calculation unit and the ideal current phase calculation unit.