Various embodiments of the present technology may comprise a method and apparatus for actuator control. The methods and apparatus may comprise various digital signal processing functions to detect a back EMF (electromotive force) and compute a countermeasure value to reduce ringing. The methods and apparatus for actuator control may apply a drive signal corresponding to the countermeasure value. The magnitude and direction of the drive signal provided at particular times during operation may facilitate a shorter settling time.

A method is disclosed for transmitting energy from a stationary unit to a movable unit of a linear transport system. The linear transport system includes a guide rail, a plurality of stationary units, and a linear motor for driving the movable unit along the guide rail. The linear motor includes a stator and a rotor, the stator including the stationary units, each having one or more drive coils. The rotor is arranged on the movable unit and incudes one or more magnets. The stationary units each have one or more energy-transmitting coils, each energy-transmitting coil including actuation electronics. The movable unit has at least one energy-receiving coil. The actuation electronics carry out the following steps: reading in an energy quantity signal for the energy-transmitting coil concerned, converting the energy quantity signal into a pulse-pause ratio for actuating the energy-transmitting coil, and actuating the energy-transmitting coil based on the pulse-pause ratio.

A method is disclosed for transmitting energy from a stationary unit to a movable unit of a linear transport system. The linear transport system includes a guide rail, a plurality of stationary units, and a linear motor for driving the movable unit along the guide rail. The linear motor includes a stator and a rotor, the stator including the stationary units, each having one or more drive coils. The rotor is arranged on the movable unit and incudes one or more magnets. The stationary units each have one or more energy-transmitting coils, each energy-transmitting coil including actuation electronics. The movable unit has at least one energy-receiving coil. The actuation electronics carry out the following steps: reading in an energy quantity signal for the energy-transmitting coil concerned, converting the energy quantity signal into a pulse-pause ratio for actuating the energy-transmitting coil, and actuating the energy-transmitting coil based on the pulse-pause ratio.

A control device for a linear motor includes a speed controller that calculates a current command value by an integration operation using a first integral value of a difference between a moving speed of a movable element provided in the linear motor and a speed command value calculated on the basis of a position command value, a current controller that applies a voltage to the linear motor on the basis of the current command value, and a correction value storage unit that stores the first integral value of the speed controller when the movable element remains at a position indicated by the position command value. When resuming control of the linear motor, the speed controller sets the first integral value stored in the correction value storage unit as an initial value for the integration operation before the brake controller turns off the brake device.

A linear motor driving method and circuit and a related apparatus are provided. The method is applied to a linear motor driving circuit. According to the method, the power supply module can supply power to the driver module and the control module, so that the control module can control the driver module to start and drive the linear motor to operate, so as to allow an electronic device to produce a vibration effect; and then the control module can control the driver module to turn off and stop driving the linear motor. However, the linear motor will continue to make damped vibration due to inertia. Specifically, a coil of the linear motor generates an induced electromotive force during vibration. Therefore, after the driver module is turned off, the control module will also control the energy recovery module to recover electric energy generated by the damped vibration of the linear motor.

Various embodiments of the present technology may comprise a method and apparatus for actuator control. The methods and apparatus may comprise various digital signal processing functions to detect a back EMF (electromotive force) and compute a countermeasure value to reduce ringing. The methods and apparatus for actuator control may apply a drive signal corresponding to the countermeasure value. The magnitude and direction of the drive signal provided at particular times during operation may facilitate a shorter settling time.

A ringing peak detector circuit includes an input buffer receives a pair of differential feedback signals indicating a drain-source voltage of the at least one low side electronic switch. The input buffer generates shifted differential feedback signals having a common mode voltage that is equal to approximately one half of the supply voltage. A peak detector circuit is coupled to the input buffer to receive the shifted differential voltage signals. The peak detector circuit detects a peak value of an oscillation on the inductive electric load and to generate an output signal indicating the detected peak value. A circuit generates a control signal based on the detected peak value and a maximum value, with the control signal being applied to the inductive electrical load driver to control switching of the at least one low side switch.

A ringing peak detector module detects a ringing at the output of an inductive load driver including a bridge circuit containing high side and low side switches. A ringing peak detector receives differential feedback signals representative of the drain-source voltage of the low-side switch and detects a ringing peak of an oscillation of a current/voltage on the inductive load. A module compares said detected ringing peak with a maximum value and controls said driver by an error signal calculated as a function of the difference between said peak value and maximum value. The ringing peak detector module includes an input buffer module upstream of said peak detector circuit that shifts the differential feedback signals so a common mode of these signals is centered at a half-dynamic level of a supply voltage to provide correspondingly shifted voltages forming a shifted differential output corresponding to a steady state of the differential feedback signals.

A ringing peak detector module detects a ringing at the output of an inductive load driver including a bridge circuit containing high side and low side switches. A ringing peak detector receives differential feedback signals representative of the drain-source voltage of the low-side switch and detects a ringing peak of an oscillation of a current/voltage on the inductive load. A module compares said detected ringing peak with a maximum value and controls said driver by an error signal calculated as a function of the difference between said peak value and maximum value. The ringing peak detector module includes an input buffer module upstream of said peak detector circuit that shifts the differential feedback signals so a common mode of these signals is centered at a half-dynamic level of a supply voltage to provide correspondingly shifted voltages forming a shifted differential output corresponding to a steady state of the differential feedback signals.

Various embodiments of the present technology may comprise a method and apparatus for actuator control. The methods and apparatus may comprise various digital signal processing functions to detect a back EMF (electromotive force) and compute a countermeasure value to reduce ringing. The methods and apparatus for actuator control may apply a drive signal corresponding to the countermeasure value. The magnitude and direction of the drive signal provided at particular times during operation may facilitate a shorter settling time.