An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus including a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data.

An apparatus for controlling an AC power supply for an electric motor, said AC power supply being derived from a DC voltage. The apparatus including a comparer configured to provide a comparison of a modulation index of a motor control signal with a reference value. This current data provider is configured to provide current data based on a torque demand signal; a speed signal indicating the speed of rotation of the AC motor; and an indication of the DC voltage modified on the comparison for control of the motor control signal which is based on the motor current data.

A motor drive apparatus includes: a dq-axis current controller converting phase current flowing through a synchronous motor into d-axis current and q-axis current, and controlling the phase current by determining a voltage command based on the d-axis current and a d-axis current command as well as the q-axis current and a q-axis current command; a voltage amplitude calculating unit obtaining voltage amplitude; a speed controller controlling rotational speed of the motor by determining the q-axis current command based on a speed command, the rotational speed, and a speed droop amount that reduces the speed command; a flux weakening controller performing flux control to limit amplitude of voltage output to the motor by determining the d-axis current command based on the voltage amplitude and a first voltage limit value; and a speed droop controller controlling the speed droop amount based on the voltage amplitude and a second voltage limit value.

A method of calibrating a motor assembly includes selecting an electric motor and a motor controller for the motor assembly, obtaining at least one electric motor parameter of the electric motor, determining a correction factor for the electric motor based upon the at least one electric motor parameter, and programming the motor controller with the correction factor.

A method of calibrating a motor assembly includes selecting an electric motor and a motor controller for the motor assembly, obtaining at least one electric motor parameter of the electric motor, determining a correction factor for the electric motor based upon the at least one electric motor parameter, and programming the motor controller with the correction factor.

A drive system for a BLDC motor having poles implemented by separate coils that are activated in corresponding phases, which comprises a controller for controlling the level and phase of input voltages supplied to the separate coils; a controlled inverter with outputs, for applying phase-separated input voltages to each of the separate coils at desired timing for each input voltage, determined by the controller; a power source for feeding power to the controlled inverter; an up/down DC-DC converter for converting the feeding power to the input voltages according to a command signal provided by the controller. The controller is adapted to sample the instantaneous angle of the rotor of the BLDC motor; sample the input voltage input voltage and the current of each phase to obtain the input power P; and for each input voltage, calculate the phase difference value that corresponds to the input power and feeds the phase difference value to the up/down DC-DC converter, thereby causing the up/down DC-DC converter to apply each input voltage to its corresponding coil at a specific timing for obtaining an optimal match between each input voltage and the current that is being built up in the corresponding coil.

A motor control apparatus includes: a motor; a transmission mechanism configured to transmit a drive force of the motor to a load of the motor; and a control unit configured to, in case of stopping the motor being rotated at a first speed, decelerate the motor at least at a first deceleration in a first period, in which a rotation speed of the motor is decelerated from the first speed to a second speed lower than the first speed, and decelerate the motor at least at a second deceleration in a second period, in which the motor is decelerated from the second speed until stop, wherein the second deceleration is less than the first deceleration.

A motor control apparatus includes: a motor; a transmission mechanism configured to transmit a drive force of the motor to a load of the motor; and a control unit configured to, in case of stopping the motor being rotated at a first speed, decelerate the motor at least at a first deceleration in a first period, in which a rotation speed of the motor is decelerated from the first speed to a second speed lower than the first speed, and decelerate the motor at least at a second deceleration in a second period, in which the motor is decelerated from the second speed until stop, wherein the second deceleration is less than the first deceleration.

Systems, apparatus, and methods related to an automated footwear platform including motor control techniques. The motor control techniques can include operations such as operating a motor to produce different operating characteristics based on incoming battery voltage. More specifically, the control technique compares incoming battery voltage to a threshold voltage and selects from at least two target operating characteristics. If the voltage transgresses the threshold the motor is controlled to produce a first operating characteristic, and if the voltage does not transgress the threshold the motor is controlled to produce a second operating characteristic.

Systems, apparatus, and methods related to an automated footwear platform including motor control techniques. The motor control techniques can include operations such as operating a motor to produce different operating characteristics based on incoming battery voltage. More specifically, the control technique compares incoming battery voltage to a threshold voltage and selects from at least two target operating characteristics. If the voltage transgresses the threshold the motor is controlled to produce a first operating characteristic, and if the voltage does not transgress the threshold the motor is controlled to produce a second operating characteristic.