Patent ID: 11894784
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. The motor drive system according to claim 6, wherein
the power conversion circuit includes an inverter circuit having an input end connected to a power input terminal to which the power supplied from the power source is input and an output end, to convert the power into an AC voltage of the AC power on a basis of input voltage of the power source and to output the AC power to the output end, the output end being connected to a power output terminal to which the electric cable of the power cable is connected, and
the determination circuitry includes: current detection circuitry to detect a current flowing through a ground line connected to a shield terminal to which the shield of the signal transmission cable is connected; and comparison circuitry to compare the current detected by the current detection circuitry with a set value and to output disconnection detection information for disconnection of the shield of the signal transmission cable on a basis of the comparison result.