Patent ID: 11955874
Assignee: MAKITA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 1:
2. An electric powered work machine including a brushless motor as a power source, the electric powered work machine comprising:
an inverter circuit including semiconductor switching elements arranged on corresponding first current paths between a direct-current power source and the brushless motor, the inverter circuit being configured to control current flow to the brushless motor via the semiconductor switching elements;
a power-source-side switching element arranged on a second current path between the direct-current power source and the inverter circuit;
a power-source-side resistor connected in parallel to the power-source-side switching element;
at least one circuit-side resistor connected to the inverter circuit in such a state that electrical conduction is possible between a positive side and a negative side of the direct-current power source in the inverter circuit in a case where all of the semiconductor switching elements in the inverter circuit are OFF; and
a fault determiner configured to turn OFF the power-source-side switching element and all of the semiconductor switching elements and to determine whether at least one of “the semiconductor switching elements and the power-source-side switching element” is short-circuited based on a connection-point voltage at a connection point between the power-source-side switching element and the inverter circuit.