A motor controller includes: a rotation speed estimating unit that estimates a rotation speed of an motor on the basis of current information and primary frequency information of the motor; a proximity switch that outputs an ON signal when a portion of a rotating body of the motor is in proximity and outputs an OFF signal when a portion of the rotating body of the motor is not in proximity; a rotation speed computing unit that computes a rotation speed of the motor on the basis of the ON signal and the OFF signal output from the proximity switch; and an abnormality detection unit that detects an abnormality in the rotation speed estimation value or an abnormality in the proximity switch when a difference between the estimated rotation speed estimation value and the computed rotation speed computation value is equal to or larger than a threshold.

A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.

A switching module switches between receiving a first output from a sensor and a second output from a sensor-less position detection module each indicating a rotor position error of a motor. A position determining module determines a rotor position of the motor based on an output of the switching module and generates a control signal to control a parameter of the motor. A sample and hold module operates on a sum of the output of the switching module and an output of the sample and hold module from a prior instance of switching between the first and second outputs. The position determining module scales the output of the sample and hold module using first and second gains to generate first and second scaled outputs, and generates the control signal based on the output of the switching module and the first and second scaled outputs.

A motor control device includes: a rotational position calculator that calculates a rotational position of a motor that rotates a rotor; an operation state controller that controls a state of supply of operation power to the rotational position calculator; a deviation calculator that calculates a deviation of a rotational position of the rotor on the basis of a stop target rotational position of the rotor and the rotational position of the rotor after supply of a drive current to a coil is stopped and before supply of operation power to the rotational position calculator is stopped; a storage controller that stores the deviation on a storage; a rotational position control signal generator that generates a rotational position control signal for controlling the rotational position of the rotor on the basis of the deviation stored on the storage and the stop target rotational position of the rotor; and a drive current output unit that outputs the drive current to the coil on the basis of the rotational position control signal after supply of operation power to the rotational position calculator is restarted by the operation state controller.

A method for identifying an error state in a brushless direct current motor. For the purposes of this identification, an angle deviation between a shaft angle and a control angle is calculated and used to identify error states on the basis of characteristic patterns. This also works, in particular, for slowly-rotating or stationary brushless direct current motors and allows a clear reduction in the calculation capacities required, compared to the prior art.

A method and apparatus for quasi-sensorless adaptive control of a high rotor pole switched-reluctance motor (HRSRM). The method comprises the steps of: applying a voltage pulse to an inactive phase winding and measuring current response in each inactive winding. Motor index pulses are used for speed calculation and to establish a time base. Slope of the current is continuously monitored which allows the shaft speed to be updated multiple times and to track any change in speed and fix the dwell angle based on the shaft speed. The apparatus for quasi-sensorless control of a high rotor pole switched-reluctance motor (HRSRM) comprises a switched-reluctance motor having a stator and a rotor, a three-phase inverter controlled by a processor connected to the switched-reluctance motor, a load and a converter.

There are provided a motor control apparatus, an electric power steering apparatus, and a vehicle, capable of controlling the driving of an electric motor accurately even when a failure occurs in a motor electric angle detecting unit that detects a motor electric angle. The motor control apparatus includes: a relative offset amount estimating unit that estimates a relative offset amount between a reference value of an output shaft rotational angle detection value of a steering shaft, detected by an output-side rotational angle sensor, and a motor electric angle original point of a three-phase electric motor; and a motor electric angle estimating unit that calculates a motor electric angle estimate (me) based on the output shaft rotational angle and the relative offset amount, wherein when at least either one of a resolver and an angle computing unit is abnormal, the driving of the three-phase electric motor is controlled based on the motor electric angle estimate estimated by the motor electric angle estimating unit.

The present embodiment relates to an apparatus and method for processing a sensor signal and a steering control apparatus. In the sensor signal processing apparatus, an abnormality test is performed on three or more sensor signals (e.g., motor position sensor signals) by a sensor signal test module, and by the sensor signal selection module, a main sensor signal (e.g., a main normal motor position sensor signal) is selected on the basis of normal sensor signals (e.g., normal motor position sensor signals), validity of the selected main sensor signal is determined, and an output of the selected main sensor signal is controlled.

A method for identifying an error state in a brushless direct current motor. For the purposes of this identification, an angle deviation between a shaft angle and a control angle is calculated and used to identify error states on the basis of characteristic patterns. This also works, in particular, for slowly-rotating or stationary brushless direct current motors and allows a clear reduction in the calculation capacities required, compared to the prior art.

To provide a motor drive control device, an electric power steering device, and a vehicle which can individually diagnose abnormalities of magnetic detection elements, designed in a multisystem configuration to include at least two systems, for each system. A motor drive control device includes two systems of first and second rotation information detection function units. The first and second rotation information detection function units include first and second rotation position information detection units and first and second rotation information detection units. The first and second rotation information detection units individually diagnose their own abnormalities based on first and second motor rotation position signals detected by the first and second rotation position information detection units.