Abstract: A drive arrangement for a vehicle, the drive arrangement comprising a rotatable interface arranged to be mounted to the vehicle, wherein the rotatable interface is rotatably coupled to a mounting arm to allow continuous rotation of the mounting arm in a clockwise and anti clockwise direction that is substantially perpendicular to the longitudinal and transverse axis of the vehicle; and a first electric motor having a stator and a rotor, wherein the stator is coupled to the mounting arm to allow the axis of the rotor to be substantially perpendicular to the rotational axis of the rotatable interface, wherein the rotor is arranged to be coupled to a wheel of the vehicle to allow the electric motor to provide drive torque to the wheel.

Abstract: A traction control system for a vehicle having a first wheel driven by a first electric motor including a first set of coil windings, the system comprising a first controller arranged to control current in the coil windings for generating a drive torque for driving the first wheel, and a second controller arranged to determine a maximum wheel velocity based on a first slip ratio value for the first wheel and the vehicle velocity and a minimum wheel velocity based on a second slip ratio value for the first wheel and the vehicle velocity. The second controller communicates to the first controller the maximum and minimum values and a torque demand value corresponding to a drive torque for driving the first wheel. The first controller controls current in the coil windings to generate a drive torque based on the maximum and minimum wheel velocity and torque demand values from the second controller.

Abstract: A capacitor component comprising a first busbar, a second busbar, one or more capacitor elements and a housing, the housing having a first portion and a second portion, wherein the first portion and the second portion are arranged to extend around an aperture, the first portion includes a section for housing the one or more capacitor elements, with the second portion extending between a first end and a second end of the first portion, wherein the first busbar and the second busbar are arranged to extend around the first portion and the second portion of the housing, a first power supply terminal is formed at the first end of the first portion and a second power supply terminal is formed at the second end of the first portion, wherein the first power supply terminal is coupled to the first busbar and the second power supply terminal is coupled to the second busbar, wherein a first conductive layer of the one or more capacitor elements is coupled to the first busbar and a second conductive layer of the one or m

Abstract: A circuit for a multi phase bridge inverter having a plurality of high and low side switches arranged to be coupled, respectively, to first and second power source busbars. The multi phase inverter is arranged to control current flow in coil windings of an electric motor, and a DC link capacitor is coupled between the first and second power source busbars. The circuit comprises first and second impedances coupled in series between the first and second power source busbars and in parallel to the DC link capacitor, and means coupled between the first and second impedances for providing a voltage from the coupling between the first and second impedances to the low side switches upon the occurrence of a first predetermined condition to place the low side switches in a close circuit configuration to allow coil windings of an electric motor to be placed in a short circuit configuration.

Abstract: A method and device estimate life consumption for an electronic component for use with an electric motor. The method and device allow maximal/minimal temperature values of semiconductor devices to be continuously monitored to allow on-cycle thermal damage and post-cycle damage to be determined in a parallel manner.

Abstract: A drive arrangement for a vehicle, the drive arrangement comprising a rotatable interface arranged to be mounted to the vehicle, wherein the rotatable interface is rotatably coupled to a mounting arm to allow continuous rotation of the mounting arm in a clockwise and anti clockwise direction that is substantially perpendicular to the longitudinal and transverse axis of the vehicle; and a first electric motor having a stator and a rotor, wherein the stator is coupled to the mounting arm to allow the axis of the rotor to be substantially perpendicular to the rotational axis of the rotatable interface, wherein the rotor is arranged to be coupled to a wheel of the vehicle to allow the electric motor to provide drive torque to the wheel.

Abstract: A stator for an electric motor or generator, the stator comprising a circumferential support having a plurality of first engagement elements distributed about the circumferential support, a first resiliently deformable element having a first temperature sensing element mounted on the circumferential support, a plurality of teeth for receiving coil windings, wherein each tooth includes a second engagement element to allow engagement with a first engagement element on the circumferential support for allowing each tooth to be mounted on the circumferential support, wherein coil windings on a tooth are arranged to engage with the first temperature sensing element when the tooth is being mounted to the circumferential support with the first resiliently deformable element being arranged to deform upon the coil windings on the tooth engaging with the first temperature sensing element to move the temperature sensing element from a first position to a second position.

Abstract: A double wishbone suspension system for an in-wheel electric motor comprises an upper arm having a first end pivotally coupled to an upper portion of a motor mounting plate and two spaced apart second ends, the upper arm second ends are respectively coupled to first and second suspension mounting points; a lower arm having a first end pivotally coupled to a lower portion of the mounting plate and two spaced apart second ends, the lower arm second ends are respectively coupled to third and fourth suspension mounting points; a first coupling member having a first end pivotally coupled between the lower arm first second ends and a first coupling member second end is pivotally coupled to a second coupling element first end, wherein a second coupling member second end is pivotally coupled to the mounting plate between the first ends of the upper and lower arms.

Abstract: A controller for an electric motor system including a three phase bridge inverter having a plurality of high side switches and a plurality of low side switches, the controller comprising means arranged upon detection of a fault in one of the high side switches to place the remaining high side switches in a closed circuit configuration and the plurality of low side switches in an open circuit configuration and upon detection of a fault in one of the low side switches to place the remaining low side switches in a closed circuit configuration and the plurality of high side switches in an open circuit configuration to allow coil windings of an electric motor to be placed in a short circuit configuration.

Abstract: A control device for an electric motor having a first set of coil windings arranged to form a first sub motor and a second set of coil windings arranged to form a second sub motor, wherein current flow in the first set of coil windings is controlled using a first pulse width modulation, PWM, having a first switching sequence and current flow in the second set of coil windings is controlled using a second PWM having a second switching sequence, the control device comprising means arranged to measure the current flow in each of the first set of coil windings, wherein upon determining that the sum of the current flow in the first set of coil windings is substantially non zero, deriving the first PWM values from voltage values used to generate the second PWM.

Abstract: A traction control system for a vehicle having a first wheel driven by a first electric motor including a first set of coil windings, the system comprising a first controller arranged to control current in the coil windings for generating a drive torque for driving the first wheel, and a second controller arranged to determine a maximum wheel velocity based on a first slip ratio value for the first wheel and the vehicle velocity and a minimum wheel velocity based on a second slip ratio value for the first wheel and the vehicle velocity. The second controller communicates to the first controller the maximum and minimum values and a torque demand value corresponding to a drive torque for driving the first wheel. The first controller controls current in the coil windings to generate a drive torque based on the maximum and minimum wheel velocity and torque demand values from the second controller.

Abstract: An arrangement for mounting a coil winding on a stator tooth, the arrangement comprising a mounting element having a first mounting arm for receiving a first stator tooth and a second mounting arm for receiving a second stator tooth, wherein the first mounting arm is movable relative to the second mounting arm between a first position and a second position; means for mounting an electrical conductor on the first stator tooth and the second stator tooth when the first mounting arm is in the first position relative to the second mounting arm to form a coil winding on the first stator tooth and the second stator tooth; and means for placing the first mounting arm in the second position relative to the second mounting arm when the conductor has been mounted on the first stator tooth and the second stator tooth to allow the first stator tooth and the second stator tooth to be removed from the first mounting arm and the second mounting arm respectively.

Abstract: A brake arrangement for a vehicle comprising a braking system arranged to vary hydraulic or pneumatic brake pressure that is arranged to apply a pressure to a brake caliper; an electric motor arranged to generate a braking torque that is applied to a first wheel when the electric motor is placed in a braking mode of operation, wherein the electric motor is arranged to vary brake torque generated when the electric motor is in the braking mode dependent upon a predetermined operating condition of the braking system.

Abstract: A method of assembling an electric motor or generator having an annular first element mounted on a circumferential mounting surface of a second element, the method comprising placing a heating coil within an inner annular surface of the annular first element; applying a current to the heating coil to heat the inner annular surface of the annular first element to a temperature that results in the inner annular surface of the annular first element increasing in diameter to allow the annular first element to be mounted on or over the circumferential mounting surface of the second element; and cooling the annular first element to form an interference fit between the annular first element and the circumferential mounting surface of the second element.

Abstract: A lead frame for electrically coupling a plurality of inverter legs of an inverter to a set of coil windings of an electric motor or generator, the lead frame comprising a printed circuit board having a plurality of circuit board layers. Each circuit board layer includes an insulating substrate having an electrically conductive layer formed on the insulating substrate. First, second and third circuit board layers each include a respective electrically conductive layer arranged to be coupled to a corresponding coil winding of the first set of coil windings and a respective inverter leg. A fourth circuit board layer includes a respective electrically conductive layer arranged to be coupled to all of the third coil windings to form a neutral point therebetween.

Abstract: A control system for a vehicle having a first wheel (101) arranged to be driven by a first drive source and a second wheel (101) arranged to be driven by a second drive source, wherein the first wheel and the second wheel are transversely located on the vehicle, the control system comprising a controller (102) and a monitoring device, wherein the monitoring device is arranged to monitor the power differential between the power being applied to the first wheel by the first drive source and the power being applied to the second wheel by the second drive source, wherein upon a determination that the power differential between the power being applied to the first wheel and the second wheel is greater than a predetermined value, the controller is arranged to reduce the power differential.

Abstract: A method for controlling an electric motor, the method comprising receiving a command to place the electric motor in a short circuit mode; varying a limit to an available pulse width modulation depth for controlling current flow in the electric motor to a predetermined value over a predetermined time period or at a predetermined rate of change; wherein upon the pulse width modulation depth limit being varied to the predetermined value placing the electric motor in the short circuit mode.

Abstract: A control module for an electric motor having a stator that includes a first surface, wherein cooling fluid flows within the stator for providing cooling to the first surface, the control module having a power device having switching elements; a control device for controlling operation of the switching elements; a housing with a first side for mounting to the first surface, wherein the first side includes an aperture allowing a portion of the power device to contact the first surface when the housing is mounted to the first surface for cooling the switching elements, wherein the control device is mounted in the housing on an opposite side of the power device to the first side of the housing and an elastomer is located over the power device and the control device for providing an electrical insulation barrier over the switching elements and electrical components on the control device.

Abstract: A stator for an electric motor, the stator comprising a back-iron having a first surface and a heat sink having a second surface, wherein the first surface of the back-iron includes a plurality of keying features arranged to retain the heat sink to the back-iron, wherein the heat sink is arranged to provide cooling to the back-iron via the second surface, and wherein the second surface has complementary keying features to the plurality of keying features on the first surface that are formed by casting the heat sink on the first surface of the back-iron.

Abstract: An apparatus for mounting a magnet to a rotor or stator of an electric machine includes a mounting element having a second mounting surface, wherein the mounting element is arranged to magnetically interact with the magnet to allow a magnetic force to magnetically attach the magnet to the second mounting surface; means for moving the mounting element having the magnet magnetically attached to the second mounting surface to a predetermined distance from a first mounting surface of the rotor or stator; and means for moving the mounting element away from the first mounting surface when the mounting element is at the predetermined distance from the first mounting surface. The apparatus further includes means for varying the flux density between the mounting element and the magnet.