An apparatus for controlling a motor included in a vehicle may comprise a main regulator configured to supply a source voltage, a plurality of sub-regulators connected to the main regulator, each of the sub-regulators configured to convert the source voltage to a respective sub-voltage, a passive component connected to the main regulator, and a plurality of sensors comprising first sensors and a second sensor, each of the first sensors connected to a corresponding sub-regulator of the sub-regulators, the second sensor connected to the main regulator through the passive component.

The present disclosure is directed to a cooling system for a system, such as an electric power assisted steering (EPAS) system and the components of such system, such as a motor. The cooling system includes a temperature sensor coupled to an electric motor of the EPAS system, one or more fluid reservoirs, and a fluid transfer device coupled to the motor and to the first fluid reservoirs. The fluid transfer device extends along a length of the motor. The cooling system further includes a pump coupled to the fluid reservoir and the fluid transfer device, a control unit coupled to the sensor and the pump. The control unit is configured to activate the pump in response to temperature detected by the sensor being greater than or equal to a first threshold motor temperature. The pump transfers the fluid in the fluid reservoirs to the fluid transfer device for absorbing the heat of the motor. The fluid transfer device is configured to contain the transferred fluid.

A vehicle has a detecting section that detects, as a detection value, a rotational angle of each wheel assembly. A transmitter provided in each wheel assembly transmits transmission data when the rotational angle of the wheel assembly is any of specific angles. At the performance of transmission at the specific angle, the transmitter changes data that is different from angular data indicating the rotational angle of the wheel assembly and is included in the transmission data in accordance with the specific angle. A vehicle-mounted receiver collects the detection values detected by the detecting section upon reception of the transmission data. The receiver collects the detection values for each piece of the transmission data transmitted at the same specific angle based on a manner in which data included in the received transmission data is changed in accordance with the specific angle.

A steering controller includes processing circuitry configured to execute a torque control process that calculates a steering-side operation amount, an angle feedback control process that calculates an angle-side operation amount, and an operation process that operates a drive circuit of an electric motor to adjust torque of the electric motor to a torque command value. The processing circuitry is further configured to execute a switch process that switches, when determining that a controllability of the electric motor is less than or equal to a predetermined efficiency, the torque command value from a value based on the angle-side operation amount to a value based on the steering-side operation amount instead of the angle-side operation amount.

A wheel steering system includes a steering device arranged on a steerable wheel, a signal execution device and a steering angle control device. The steering device includes a wheel support rotatably connected to a chassis by a slewing bearing, a bottom of the wheel support is rotatably connected to two ends of a rotary shaft of the steerable wheel, and the wheel support is configured to drive the steerable wheel to turn by 360 degrees through the slewing bearing. The signal execution device is configured to control an angle of rotation of the steerable wheel driven by the slewing bearing. The steering angle control device includes a plurality of reciprocating switch rotors, and the plurality of switch rotors are configured to send electrical signals of steering angles to the signal execution device.

An auxiliary power supply apparatus is disposed on a power supply path from a main power supply apparatus to an electric power steering apparatus. The auxiliary power supply apparatus includes an auxiliary power supply that is a rechargeable power storage device, an on-off switch that is configured to selectively disconnect or connect the electric power steering apparatus and the auxiliary power supply from or to the main power supply apparatus, and an operation unit that is configured to operate the on-off switch. The operation unit is configured to switch the on-off switch from an ON state to an OFF state on a condition that a voltage supplied to the auxiliary power supply apparatus from the main power supply apparatus is less than or equal to a specified voltage reduction determination value and a vehicle speed is greater than a specified low vehicle speed determination value.

Among other things, we describe techniques for electric power steering torque compensation. Techniques are provided for a method implemented by a computer, e.g., a computer onboard an autonomous vehicle. A planning circuit onboard the vehicle and connected to an EPS of the vehicle determines a compensatory torque signal to modify an actual steering angle of a steering wheel of the vehicle to match an expected steering angle of the steering wheel. The planning circuit transmits the compensatory torque signal to a control circuit that controls the steering angle of the steering wheel. The EPS modifies the actual steering angle based on the compensatory torque signal resulting in a modified steering angle. The control circuit operates the vehicle based on the modified steering angle.

A microcomputer stores an offset correction value for correcting an offset of a detected current along with a pulse shift for each of a detected current of a maximum phase to which power is supplied for the longest time among three phases and a detected current of a minimum phase to which power is supplied for the shortest time among the three phases, and corrects the detected current of each of the phases with use of the stored offset correction values for the detected current of the maximum phase and the detected current of the minimum phase.

A steering device according to the present invention includes: a steering input device including a reaction force actuator that applies a steering reaction force to a steering operation input member; and a control device including a steering gear ratio change unit that changes a steering gear ratio in accordance with a vehicle speed, a reaction force actuator control unit that controls an output amount of the reaction force actuator in accordance with an operation angular velocity of the steering operation input member, and a reaction force actuator output amount change unit that changes, based on the steering gear ratio, the output amount of the reaction force actuator. This makes it possible to set an appropriate steering reaction force applied to the steering operation input member, thereby stably reducing the operational burden on a driver.

Technical solutions are described for controlling operation of an electric machine such as a permanent magnet synchronous motor (PMSM) drive or motor control system to limit battery current and protect a battery from excessive discharging or charging current from the PMSM drive. Systems and methods employ a torque control algorithm for PMSMs that uses a battery current limit constraint when generating current commands during each of a maximum torque per ampere (MTPA) operation, and maximum torque per voltage (MTPV) operation. Torque search operations are performed in each of the MTPA and MTPV operation regions in a PMSM drive system until current commands are achieved under a given battery current limit constraint and while maintaining maximum voltage utilization throughout all PMSM operation regions.