A field of electric drive devices and arrangements including a plurality of power semiconductor components formed in or on a common substrate, and more particularly to a method and an apparatus for monitoring the condition of a power semiconductor module. The method for monitoring the condition of a power semiconductor module of an electric drive device connected to an electric machine includes the steps of engaging a locking of the rotor of the electric machine at zero speed or at near zero speed by injecting DC currents by the electric drive device, initiating test temperature recording in the power semiconductor module, disengaging the locking the rotor of the electric machine by the electric drive device, terminating the test temperature recording and storing the recorded data of the test temperature as test temperature data, and determining the condition of the power semiconductor module utilising the test temperature data.

Embodiments herein relate to a permanent magnet (PM) motor driven hoist with a motor based electromagnetic brake. The hoist includes a direct current (DC) power source, a PM motor having stator coils and a PM rotor operably coupled to a cable drum with a cable wrapped thereon. The hoist also includes a controller operably connected to the direct current power source and the PM motor, wherein the controller is configured to control the PM motor employing a method to brake the PM motor. The method includes generating control signals in the controller based on a position of the PM motor, applying a braking command signal to the PM motor to magnetically lock the PM rotor of the PM motor for a selected duration, removing the braking command signals for a second selected duration, and repeating the generating, applying, and removing until the PM motor has stopped.

Embodiments herein relate to a permanent magnet (PM) motor driven hoist with a motor based electromagnetic brake. The hoist includes a direct current (DC) power source, a PM motor having stator coils and a PM rotor operably coupled to a cable drum with a cable wrapped thereon. The hoist also includes a controller operably connected to the direct current power source and the PM motor, wherein the controller is configured to control the PM motor employing a method to brake the PM motor. The method includes generating control signals in the controller based on a position of the PM motor, applying a braking command signal to the PM motor to magnetically lock the PM rotor of the PM motor for a selected duration, removing the braking command signals for a second selected duration, and repeating the generating, applying, and removing until the PM motor has stopped.

A method for using an active braking mechanism to halt the motion of a treadmill belt, or other exercise machine system, when the engine ceases driving it and to hold the belt, or system, after the brake is engaged. The types of braking systems will generally utilize at least one but often two or more forms of electrical braking. Frictional braking systems may also be present, but the electrical braking systems will generally be primarily responsible for braking the belt at high inclines.

A method for using an active braking mechanism to halt the motion of a treadmill belt, or other exercise machine system, when the engine ceases driving it and to hold the belt, or system, after the brake is engaged. The types of braking systems will generally utilize at least one but often two or more forms of electrical braking. Frictional braking systems may also be present, but the electrical braking systems will generally be primarily responsible for braking the belt at high inclines.

An electrical machine comprising: at least one stator, at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, an integrated electrical differential coupled to at least one of the rotors, the at least one integrated electrical differential permitting the at least one rotor to output at least two rotational outputs to corresponding shafts, wherein the at least two rotational outputs are able to move the shafts at different rotational velocities to one another. The electrical machine is configured to fit into a housing, and that can be retrofitted into a conventional vehicle by replacing the mechanical differential.

An electrical machine comprising: at least one stator, at least one module, the at least one module comprising at least one electromagnetic coil and at least one switch, the at least one module being attached to the at least one stator; at least one rotor with a plurality of magnets attached to the at least one rotor, an integrated electrical differential coupled to at least one of the rotors, the at least one integrated electrical differential permitting the at least one rotor to output at least two rotational outputs to corresponding shafts, wherein the at least two rotational outputs are able to move the shafts at different rotational velocities to one another. The electrical machine is configured to fit into a housing, and that can be retrofitted into a conventional vehicle by replacing the mechanical differential.

A method for using an active braking mechanism to halt the motion of a treadmill belt, or other exercise machine system, when the engine ceases driving it and to hold the belt, or system, after the brake is engaged. The types of braking systems will generally utilize at least one but often two or more forms of electrical braking. Frictional braking systems may also be present, but the electrical braking systems will generally be primarily responsible for braking the belt at high inclines.

A method for using an active braking mechanism to halt the motion of a treadmill belt, or other exercise machine system, when the engine ceases driving it and to hold the belt, or system, after the brake is engaged. The types of braking systems will generally utilize at least one but often two or more forms of electrical braking. Frictional braking systems may also be present, but the electrical braking systems will generally be primarily responsible for braking the belt at high inclines.

An inverter control device that controls a rotary electric machine drive device that includes an inverter with a plurality of switching elements, where the active short circuit control is executed in a high rotational speed region, and the shut-down control is executed in a low rotational speed region, which is on a low rotational speed side with respect to the high rotational speed region, in accordance with at least a rotational speed of the rotary electric machine.