Provided are an automatic advance angle control system and method for a brushless linear direct current (BLDC) motor. The automatic advance angle control system for the BLDC motor includes a current controller configured to generate an anti-windup output for compensating for accumulated errors of an output voltage provided to the BLDC motor; a voltage headroom calculator configured to generate a voltage headroom from a counter-electromotive force and the output voltage provided to the BLDC motor; and an advance angle controller configured to generate an advance angle for controlling a phase of a phase current of the BLDC motor by performing proportional integration on a difference between the anti-windup output and the voltage headroom when the anti-windup output is generated and configured to ignore the generation of the advance angle when the anti-windup output is not generated.

Provided are an automatic advance angle control system and method for a brushless linear direct current (BLDC) motor. The automatic advance angle control system for the BLDC motor includes a current controller configured to generate an anti-windup output for compensating for accumulated errors of an output voltage provided to the BLDC motor; a voltage headroom calculator configured to generate a voltage headroom from a counter-electromotive force and the output voltage provided to the BLDC motor; and an advance angle controller configured to generate an advance angle for controlling a phase of a phase current of the BLDC motor by performing proportional integration on a difference between the anti-windup output and the voltage headroom when the anti-windup output is generated and configured to ignore the generation of the advance angle when the anti-windup output is not generated.

The present invention relates to a logistics area (15, 115, 215, 315, 415) comprising a plurality of planar units (1, 101, 201, 301, 401), wherein each planar unit (1, 101, 201, 301, 401) is equipped with at least one encoder (5) having at least one sensor array (11) for determining the position and/or positioning of at least one mover (40), wherein the at least one mover (40) comprises magnets arranged in at least one pole pitch grid, wherein further the plurality of planar units (1, 101, 201, 301, 401) being arranged to a surface in such a way that the encoders (5) of the planar units (1, 101, 201, 301, 401) form at least an at least area-wise uniform grid, wherein the distance of the encoders (5) of at least two planar units (1, 101, 201, 301, 401) and/or at least two encoders (5) of a planar unit (1, 101, 201, 301, 401) corresponds to a multiple of the pole pair width of the magnets of the at least one mover (40), as well as a method for operating at least one logistics surface and a computer program product as well as a control unit for a logistics surface.

The present invention relates to a logistics area (15, 115, 215, 315, 415) comprising a plurality of planar units (1, 101, 201, 301, 401), wherein each planar unit (1, 101, 201, 301, 401) is equipped with at least one encoder (5) having at least one sensor array (11) for determining the position and/or positioning of at least one mover (40), wherein the at least one mover (40) comprises magnets arranged in at least one pole pitch grid, wherein further the plurality of planar units (1, 101, 201, 301, 401) being arranged to a surface in such a way that the encoders (5) of the planar units (1, 101, 201, 301, 401) form at least an at least area-wise uniform grid, wherein the distance of the encoders (5) of at least two planar units (1, 101, 201, 301, 401) and/or at least two encoders (5) of a planar unit (1, 101, 201, 301, 401) corresponds to a multiple of the pole pair width of the magnets of the at least one mover (40), as well as a method for operating at least one logistics surface and a computer program product as well as a control unit for a logistics surface.

An electric motor control device includes a drive waveform generating unit configured to generate a drive waveform (a sine wave or a pseudo-trapezoidal wave) to an electric motor. A plurality of photo interrupters detect a rotational phase of an electric motor, and a information of rotational speed is detected by an encoder circuit based on a detected signal of the rotational phase of the electric motor. The control unit controls the drive waveform generating unit on the basis of detection information of the rotational phase of the electric motor and performs control so that a phase relationship between the rotational phase of the electric motor and the phase of the drive waveform is kept constant. Furthermore, the control unit sets an amplitude value of the drive waveform generated by the drive waveform generating unit in accordance with a difference between a target speed and the detected information of rotational speed and performs speed control so that a speed of the electric motor is kept constant. The control unit calculates an amplitude setting value with which correction for suppressing non-linearity is performed in a region in which an amplitude setting value of the drive waveform and actual work given to the electric motor is non-linear and controls the speed.

An electric motor control device includes a drive waveform generating unit configured to generate a drive waveform (a sine wave or a pseudo-trapezoidal wave) to an electric motor. A plurality of photo interrupters detect a rotational phase of an electric motor, and a information of rotational speed is detected by an encoder circuit based on a detected signal of the rotational phase of the electric motor. The control unit controls the drive waveform generating unit on the basis of detection information of the rotational phase of the electric motor and performs control so that a phase relationship between the rotational phase of the electric motor and the phase of the drive waveform is kept constant. Furthermore, the control unit sets an amplitude value of the drive waveform generated by the drive waveform generating unit in accordance with a difference between a target speed and the detected information of rotational speed and performs speed control so that a speed of the electric motor is kept constant. The control unit calculates an amplitude setting value with which correction for suppressing non-linearity is performed in a region in which an amplitude setting value of the drive waveform and actual work given to the electric motor is non-linear and controls the speed.

Disclosed herein are apparatus and methods for linear actuators that can deliver strokes and forces at different values. The linear actuators include both multi-coil and single-coil actuator designs. The linear actuators include a controller that is removably or permanently coupled to a piston assembly having any number of coils. An encoder may also be removably or permanently coupled to the piston assembly. The piston assembly, controller and encoder move as one unit during actuation of the linear actuator.

Disclosed herein are apparatus and methods for linear actuators that can deliver strokes and forces at different values. The linear actuators include both multi-coil and single-coil actuator designs. The linear actuators include a controller that is removably or permanently coupled to a piston assembly having any number of coils. An encoder may also be removably or permanently coupled to the piston assembly. The piston assembly, controller and encoder move as one unit during actuation of the linear actuator.

A position sensor mounted in an actuator includes a magnetic detecting element for detecting the position of a shaft, and a temperature detecting element for detecting intra-sensor temperature which is used for correction of the temperature characteristics of the magnetic detecting element, the magnetic detecting element and the temperature detecting element being built therein. A control device for the actuator acquires both the temperature-corrected position of the shaft and the intra-sensor temperature from the position sensor, and uses them for control of the actuator.

A position sensor mounted in an actuator includes a magnetic detecting element for detecting the position of a shaft, and a temperature detecting element for detecting intra-sensor temperature which is used for correction of the temperature characteristics of the magnetic detecting element, the magnetic detecting element and the temperature detecting element being built therein. A control device for the actuator acquires both the temperature-corrected position of the shaft and the intra-sensor temperature from the position sensor, and uses them for control of the actuator.