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.

A load stepping switch (1) for uninterrupted changeover between winding taps (n, n+1) on a control winding (20) comprisesa 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) comprisesa 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.

An electrical switch for an electric machine includes body, a stator fixedly secured to the body and a rotor. The actuator includes a first member securable to the rotor and rotatable with it. The actuator also includes a second member, a first electrically conductive member cooperates with the second member. The actuator also includes a second electrically conductive member. The second electrically conductive member is spaced from said first electrically conductive member when said first electrically conductive member is in the first axial position and electrically engaged with said first electrically conductive member when said first electrically conductive member is in the second axial position.

An electric working machine includes battery packs, an actuated device to be actuated by electricity supplied from the battery packs, and a controller to control discharging of the battery packs based on remaining charge levels of the battery packs. The controller is configured/programmed to select one of the battery packs as a discharging battery pack, and perform a limiting process to limit electricity supplied from the discharging battery pack to the actuated device when the remaining charge level of the discharging battery pack is less than a limit threshold, and cause the limit threshold and/or content of the limiting process to differ between when one or more of the battery packs that are other than the discharging battery pack have a remaining charge level of a second threshold or more and when any of such battery packs do not have a remaining charge level of the second threshold or more.