초록 ▼

Embodiments of the invention provide a variable frequency drive system and a method of controlling a pump driven by a motor with the pump in fluid communication with a fluid system. The drive system and method can provide one or more of the following: a sleep mode, pipe break detection, a line fill

Embodiments of the invention provide a variable frequency drive system and a method of controlling a pump driven by a motor with the pump in fluid communication with a fluid system. The drive system and method can provide one or more of the following: a sleep mode, pipe break detection, a line fill mode, an automatic start mode, dry run protection, an electromagnetic interference filter compatible with a ground fault circuit interrupter, two-wire and three-wire and three-phase motor compatibility, a simple start-up process, automatic password protection, a pump out mode, digital input/output terminals, and removable input and output power terminal blocks.

대표청구항 ▼

1. A method of controlling a pump driven by a motor, the motor being connected to ground, and a variable frequency drive connected to the motor, the method comprising: operating the variable frequency drive so the motor is being driven and the variable frequency drive is regulating a speed of the pu

1. A method of controlling a pump driven by a motor, the motor being connected to ground, and a variable frequency drive connected to the motor, the method comprising: operating the variable frequency drive so the motor is being driven and the variable frequency drive is regulating a speed of the pump in a substantially continuous operation;sensing a current between the variable frequency drive, the motor, and ground;determining whether there has been a loss of current indicating a ground fault;simultaneously operating the variable frequency drive, the motor, and an electromagnetic interference filter while sensing the current and determining whether there has been a loss of current; andremoving power from the variable frequency drive and the motor substantially immediately when there has been a loss of current. 2. The method of claim 1 and further comprising reducing electrical noise generated by the motor and simultaneously providing protection against shock. 3. The method of claim 1 and further comprising operating the electromagnetic interference filter in order to help prevent noise interference with AM radio.