An actuator device includes: a motor that is a driving source; a reduction gear that decelerates rotation of the motor; an accommodating member that accommodates the reduction gear; and a conductive member that is disposed integrally with the accommodating member and is in sliding contact with the reduction gear so that a ground circuit capable of grounding the reduction gear is formed.

An actuator device includes: a motor that is a driving source; a reduction gear that decelerates rotation of the motor; an accommodating member that accommodates the reduction gear; and a conductive member that is disposed integrally with the accommodating member and is in sliding contact with the reduction gear so that a ground circuit capable of grounding the reduction gear is formed.

A power tool with a combined printed circuit board (PCB) that reduces internal wiring of the power tool and provides a large amount of air flow to internal components. In some instances, the combined PCB has a surfboard shape and includes a motor control unit and power switching elements (Field Effect Transistors or FETs). The combined surfboard PCB is located above the trigger, but below the motor and drive mechanism. In other instances, the combined PCB has a doughnut shape and is located coaxially with a motor shaft. The combined PCB may be positioned between a doughnut-shaped control PCB and the motor.

A power tool with a combined printed circuit board (PCB) that reduces internal wiring of the power tool and provides a large amount of air flow to internal components. In some instances, the combined PCB has a surfboard shape and includes a motor control unit and power switching elements (Field Effect Transistors or FETs). The combined surfboard PCB is located above the trigger, but below the motor and drive mechanism. In other instances, the combined PCB has a doughnut shape and is located coaxially with a motor shaft. The combined PCB may be positioned between a doughnut-shaped control PCB and the motor.

Provided is an electric driving device including a plate member which is made of a material having electroconductivity, and is arranged between a cover and a control unit main body. An electroconductive member made of a material having electroconductivity is provided to the cover. The plate member includes a first mounting portion and a second mounting portion. The first mounting portion is mounted to a control unit main body, and a second mounting portion is formed at a position different from a position of the first mounting portion. The electroconductive member has a connection portion which projects from the cover. At least one of the second mounting portion or the connection portion is more deformable than the plate member except for the second mounting portion.

Provided is an electric driving device including a plate member which is made of a material having electroconductivity, and is arranged between a cover and a control unit main body. An electroconductive member made of a material having electroconductivity is provided to the cover. The plate member includes a first mounting portion and a second mounting portion. The first mounting portion is mounted to a control unit main body, and a second mounting portion is formed at a position different from a position of the first mounting portion. The electroconductive member has a connection portion which projects from the cover. At least one of the second mounting portion or the connection portion is more deformable than the plate member except for the second mounting portion.

A traction control system for a vehicle having a first wheel driven by a first electric motor including a first set of coil windings, the system comprising a first controller arranged to control current in the coil windings for generating a drive torque for driving the first wheel, and a second controller arranged to determine a maximum wheel velocity based on a first slip ratio value for the first wheel and the vehicle velocity and a minimum wheel velocity based on a second slip ratio value for the first wheel and the vehicle velocity. The second controller communicates to the first controller the maximum and minimum values and a torque demand value corresponding to a drive torque for driving the first wheel. The first controller controls current in the coil windings to generate a drive torque based on the maximum and minimum wheel velocity and torque demand values from the second controller.

A traction control system for a vehicle having a first wheel driven by a first electric motor including a first set of coil windings, the system comprising a first controller arranged to control current in the coil windings for generating a drive torque for driving the first wheel, and a second controller arranged to determine a maximum wheel velocity based on a first slip ratio value for the first wheel and the vehicle velocity and a minimum wheel velocity based on a second slip ratio value for the first wheel and the vehicle velocity. The second controller communicates to the first controller the maximum and minimum values and a torque demand value corresponding to a drive torque for driving the first wheel. The first controller controls current in the coil windings to generate a drive torque based on the maximum and minimum wheel velocity and torque demand values from the second controller.

An electric machine may include a housing having a front end and a back end where the front end is the primary mechanical coupling end. The electric machine may include a stator and a rotor arranged within the housing and a shaft connected to the rotor. The shaft may extend out of the front end of the housing and the shaft may be configured to be rotationally driven by the rotor or to rotationally drive the rotor. The electric machine may also include an electronic controller configured to control operations of the rotor and stator and the electronic controller may be mounted on the front end of the housing.

An electric machine may include a housing having a front end and a back end where the front end is the primary mechanical coupling end. The electric machine may include a stator and a rotor arranged within the housing and a shaft connected to the rotor. The shaft may extend out of the front end of the housing and the shaft may be configured to be rotationally driven by the rotor or to rotationally drive the rotor. The electric machine may also include an electronic controller configured to control operations of the rotor and stator and the electronic controller may be mounted on the front end of the housing.