A control device (1) for a goods transport conveyor (100) has a processor (10) that generates control signals for at least one drive motor (350) of a transport section (110; 120; 130) of the goods transport conveyor (100). The motor operates in stop-and-go mode. The processor (10) is configured to control the drive motor (350) by means of a forward phase and/or reverse phase when the transport section (110; 120; 130) of the goods transport conveyor (100) stops such that the torque (M(t)) produced by the drive motor (350) is reduced according to an adjustable stopping function. The processor (10) sets the stopping function depending on detected process data of the transport section (110; 120; 130).

A method for braking a motor in a high lift system of an aircraft, the high lift system comprising a central power drive unit for moving high lift surfaces arranged at a wing through providing rotational power by means of a transmission shaft to a plurality of drive stations operably coupled with the high lift surfaces; which power drive unit is operatively coupled to a controller and comprises at least one electric motor coupled therewith. The method includes determining a braking requirement for the at least one electric motor, measuring at least one of a current command to the motor and a current speed and direction of the at least one electric motor, based on the braking requirement, applying a braking command to the at least one electric motor, and reducing the braking command as the at least one electric motor comes to rest.

A method for braking a motor in a high lift system of an aircraft, the high lift system comprising a central power drive unit for moving high lift surfaces arranged at a wing through providing rotational power by means of a transmission shaft to a plurality of drive stations operably coupled with the high lift surfaces; which power drive unit is operatively coupled to a controller and comprises at least one electric motor coupled therewith. The method includes determining a braking requirement for the at least one electric motor, measuring at least one of a current command to the motor and a current speed and direction of the at least one electric motor, based on the braking requirement, applying a braking command to the at least one electric motor, and reducing the braking command as the at least one electric motor comes to rest.

A method for controlling a three-phase AC motor, wherein the three-phase AC motor has a rotatably mounted rotor and a stator including a first group of coils and a second group of coils. Each of the coils generates an oscillating magnetic field upon actuation using an alternating current. The phases of the alternating currents are selected such that the superposition of the magnetic fields of the first group of coils generates a magnetic rotating field that rotates with a direction of rotation and the superposition of the magnetic fields of the second group of coils generates a magnetic rotating field that rotates counter to the direction of rotation. A system composed of a three-phase AC motor and an inverter for carrying out the control method is also described.

A method for controlling a three-phase AC motor, wherein the three-phase AC motor has a rotatably mounted rotor and a stator including a first group of coils and a second group of coils. Each of the coils generates an oscillating magnetic field upon actuation using an alternating current. The phases of the alternating currents are selected such that the superposition of the magnetic fields of the first group of coils generates a magnetic rotating field that rotates with a direction of rotation and the superposition of the magnetic fields of the second group of coils generates a magnetic rotating field that rotates counter to the direction of rotation. A system composed of a three-phase AC motor and an inverter for carrying out the control method is also described.

A control device (1) for a goods transport conveyor (100) has a processor (10) that generates control signals for at least one drive motor (350) of a transport section (110; 120; 130) of the goods transport conveyor (100). The motor operates in stop-and-go mode. The processor (10) is configured to control the drive motor (350) by means of a forward phase and/or reverse phase when the transport section (110; 120; 130) of the goods transport conveyor (100) stops such that the torque (M(t)) produced by the drive motor (350) is reduced according to an adjustable stopping function. The processor (10) sets the stopping function depending on detected process data of the transport section (110; 120; 130).

A control device (1) for a goods transport conveyor (100) has a processor (10) that generates control signals for at least one drive motor (350) of a transport section (110; 120; 130) of the goods transport conveyor (100). The motor operates in stop-and-go mode. The processor (10) is configured to control the drive motor (350) by means of a forward phase and/or reverse phase when the transport section (110; 120; 130) of the goods transport conveyor (100) stops such that the torque (M(t)) produced by the drive motor (350) is reduced according to an adjustable stopping function. The processor (10) sets the stopping function depending on detected process data of the transport section (110; 120; 130).

A drive control device includes a rotation speed calculation unit configured to calculate a rotation speed of a motor based on a rotation position detection signal of the motor, an energization stop time period calculation unit configured to calculate an energization stop time period for stopping energization to all phases of coils of the motor based on a target rotation speed and the rotation speed of the motor, and an energization signal generation unit configured to generate an energization signal for controlling energization to the coils of the motor to switch energization to the coils of the motor and to stop energization to all the coils of the motor in the energization stop time period.

A drive control device includes a rotation speed calculation unit configured to calculate a rotation speed of a motor based on a rotation position detection signal of the motor, an energization stop time period calculation unit configured to calculate an energization stop time period for stopping energization to all phases of coils of the motor based on a target rotation speed and the rotation speed of the motor, and an energization signal generation unit configured to generate an energization signal for controlling energization to the coils of the motor to switch energization to the coils of the motor and to stop energization to all the coils of the motor in the energization stop time period.

The present disclosure discloses a brushless DC motor braking system and method. during the braking process of the brushless DC motor, the busbar voltage value is controlled to always be between the high threshold of the busbar voltage and low threshold of the busbar voltage through the brake control module; and different PWM modulation signals are used to control the brushless DC motor 4 to perform slow braking until stopping based on different busbar voltage states. Thus, in the present disclosure, the method not only ensures that the busbar voltage value continues to be maintained between the high threshold of the busbar voltage and low threshold of the busbar voltage, thereby protecting electronic components and circuits and extending their service life; but also avoids the hard braking method of direct conduction of the three lower transistors of the three-phase inverter in related arts.