A DC-overcurrent detector includes: at least one electric line passing the detector from a source terminal of the detector to a load terminal of the detector; at least one first sensor for monitoring an electric current in the at least one electric line and outputting a current measurement signal; at least one current flow direction sensor for distinguishing a current flow direction of the electric current in the at least one electric line between a first direction from the source terminal to the load terminal and a second direction from the load terminal to the source terminal, and outputting a current flow direction signal; a comparator unit for comparing an actual value of the current measurement signal with a threshold criterion, and outputting a trigger signal at a trigger output if a value of the current measurement signal reaches the threshold criterion; and a threshold criterion unit.

A load stepping switch (1) for uninterrupted changeover between winding taps (n, n+1) on a control winding (20) comprises a changeover switch (2) that comprises a first, second and third changeover contact (2.1, 2.2, 2.3) and can adopt a first position, in which the first and third changeover contacts are connected, a second position, in which the second and third changeover contacts are connected, and a bridge position, in which the changeover contacts are connected; a first fixed contact (4) that can be connected to a first winding tap; a second fixed contact (5) that can be connected to a second winding tap; a first moving contact (6) that can optionally make contact with each of the fixed contacts; a second moving contact (7) that can optionally make contact with each of the fixed contacts; a main path (8) that connects the first moving contact to the first changeover contact; an auxiliary path (9) that connects the second moving contact to the second changeover contact via a current-limiting element (10); a switching element (11) that is connected between the main path and the second changeover contact.

A load stepping switch (1) for uninterrupted changeover between winding taps (n, n+1) on a control winding (20) comprises a changeover switch (2) that comprises a first, second and third changeover contact (2.1, 2.2, 2.3) and can adopt a first position, in which the first and third changeover contacts are connected, a second position, in which the second and third changeover contacts are connected, and a bridge position, in which the changeover contacts are connected; a first fixed contact (4) that can be connected to a first winding tap; a second fixed contact (5) that can be connected to a second winding tap; a first moving contact (6) that can optionally make contact with each of the fixed contacts; a second moving contact (7) that can optionally make contact with each of the fixed contacts; a main path (8) that connects the first moving contact to the first changeover contact; an auxiliary path (9) that connects the second moving contact to the second changeover contact via a current-limiting element (10); a switching element (11) that is connected between the main path and the second changeover contact.

A significantly self-contained station for providing selective control and operation of motorized equipment (such as a conveyor) via a momentary contact switch or wireless remote, where the self-contained station is connected to and receives power from an existing service disconnect line of the equipment, where upon the service disconnect line being powered, the self-contained station receives power to provide electrical signals to a motor contactor of the self-contained station, which then selectively provides electrical signal to a motor of the equipment to selectively operate the equipment.

A significantly self-contained station for providing selective control and operation of motorized equipment (such as a conveyor) via a momentary contact switch or wireless remote, where the self-contained station is connected to and receives power from an existing service disconnect line of the equipment, where upon the service disconnect line being powered, the self-contained station receives power to provide electrical signals to a motor contactor of the self-contained station, which then selectively provides electrical signal to a motor of the equipment to selectively operate the equipment.

The present disclosure provides a control system (100, 200, 300) for controlling a single phase induction motor (150, 250) with a main winding (151, 251) and with an auxiliary winding (152, 252), the control system (100, 200, 300) comprising a first bidirectional switching element (101) and a second bidirectional switching element (102), wherein the first bidirectional switching element (101) is arranged between a phase supply input (103, 203) of the single phase induction motor (150, 250) and the main winding (151, 251) and wherein the second bidirectional switching element (102) is arranged electrically parallel to the main winding (151, 251), a control unit (105, 205) coupled to the first bidirectional switching element (101) and the second bidirectional switching element (102), wherein the control unit (105, 205) is configured to control in an alternating manner during a positive half-wave of a supply voltage of the single phase induction motor (150, 250) the first bidirectional switching element (101) to provide a positive current to the main winding (151, 251) and the second bidirectional switching element (102) to provide a freewheeling current path for the positive current through the main winding (151, 251), and wherein the control unit (105, 205) is configured to control in an alternating manner during a negative half-wave of a supply voltage of the single phase induction motor (150, 250) the first bidirectional switching element (101) to provide a negative current to the main winding (151, 251) and the second bidirectional switching element (102) to provide a freewheeling current path for the negative current through the main winding (151, 251). Further, the present disclosure provides a respective control method.

The present disclosure provides a control system (100, 200, 300) for controlling a single phase induction motor (150, 250) with a main winding (151, 251) and with an auxiliary winding (152, 252), the control system (100, 200, 300) comprising a first bidirectional switching element (101) and a second bidirectional switching element (102), wherein the first bidirectional switching element (101) is arranged between a phase supply input (103, 203) of the single phase induction motor (150, 250) and the main winding (151, 251) and wherein the second bidirectional switching element (102) is arranged electrically parallel to the main winding (151, 251), a control unit (105, 205) coupled to the first bidirectional switching element (101) and the second bidirectional switching element (102), wherein the control unit (105, 205) is configured to control in an alternating manner during a positive half-wave of a supply voltage of the single phase induction motor (150, 250) the first bidirectional switching element (101) to provide a positive current to the main winding (151, 251) and the second bidirectional switching element (102) to provide a freewheeling current path for the positive current through the main winding (151, 251), and wherein the control unit (105, 205) is configured to control in an alternating manner during a negative half-wave of a supply voltage of the single phase induction motor (150, 250) the first bidirectional switching element (101) to provide a negative current to the main winding (151, 251) and the second bidirectional switching element (102) to provide a freewheeling current path for the negative current through the main winding (151, 251). Further, the present disclosure provides a respective control method.

A generator includes an internal combustion engine including an engine block including a cylinder including a piston, a crankshaft configured to rotate about a crankshaft axis in response to movement by the piston, and a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the piston. The generator further includes an alternator including a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power, a controller configured to control a rate of fuel supply to the internal combustion engine, and a switch configured to selectively enable the flow of a first type of fuel into the cylinder and disable the flow of a second type of fuel, wherein the controller is configured to receive an indication of a fuel type based on a position of the switch.

A generator includes an internal combustion engine including an engine block including a cylinder including a piston, a crankshaft configured to rotate about a crankshaft axis in response to movement by the piston, and a spark plug configured to periodically generate a spark to ignite fuel in the cylinder to control the movement of the piston. The generator further includes an alternator including a rotor and a stator, the rotor configured to rotate with the rotation of the crankshaft to generate alternating current electrical power, a controller configured to control a rate of fuel supply to the internal combustion engine, and a switch configured to selectively enable the flow of a first type of fuel into the cylinder and disable the flow of a second type of fuel, wherein the controller is configured to receive an indication of a fuel type based on a position of the switch.

A motor apparatus and a motor driving circuit are provided. The motor apparatus includes a motor module and the motor driving circuit. The motor driving circuit includes a plurality of bridge arm circuits, a temperature sensor, and a control circuit. Each of the bridge arm circuits is controlled by one of the first PWM signals and one of the second PWM signals generated by the control circuit and outputs a driving signal to drive the motor module. The temperature sensor senses a temperature of the bridge arm circuits and provides a temperature sensing value to the control circuit. When the temperature sensing value is greater than or equal to a threshold temperature value, the control circuit increases a duty cycle of the first PWM signal of one bridge arm circuit and a duty cycle of the second PWM signal of the other bridge arm circuits to lower the temperature.