Motor device
AssigneeTsubakimoto Chain Co.
InventorsYoshiaki Yokoi, Haruki Teramukai
Life of this patent
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Abstract
A gear motor (motor device) comprising a three-phase motor and a terminal box housing a power supply connection terminal for connecting the three phase motor to an alternating current power supply, comprises: a power detection circuit that detects power to be supplied to the three-phase motor; a control unit that executes predetermined control if a load abnormality related to the three-phase motor or a driven device is detected based on power detected by the power detection circuit. The power detection circuit and the control unit are housed in the terminal box.
Claims11
A motor device comprising a motor and a terminal box housing a connection terminal for connecting the motor to an alternating current power supply, comprising:
- a power detection circuit that detects power to be supplied to the motor;
- and
- a control unit that executes predetermined control if a load abnormality related to the motor or a driven device that is driven by the motor is detected based on power detected by the power detection circuit,
- wherein the power detection circuit and the control unit are housed in the terminal box,
- wherein the motor includes three-phase coils that are star-connected to three-phase alternating current power supply connection terminals,
- wherein the power detection circuit includes:
- three resistors that are star-connected to the three-phase alternating current power supply connection terminals;
- a voltage detection unit that detects voltage across one of the resistors corresponding to phase voltage of one of the coils;
- and
- a current detection unit that detects phase current flowing through the one of the coils, and
- wherein the control unit calculates power supplied to the motor based on the voltage across the one of the resistors and the phase current flowing through the one of the coils.
A motor device comprising a motor and a terminal box housing a connection terminal for connecting the motor to an alternating current power supply, comprising:
- a power detection circuit that detects power to be supplied to the motor;
- a control unit that executes predetermined control if a load abnormality related to the motor or a driven device that is driven by the motor is detected based on power detected by the power detection circuit;
- and
- a vibration detection unit that detects vibration of the motor device, wherein
- the power detection circuit and the control unit are housed in the terminal box, and
- the control unit detects an abnormality of the motor device or a driven device that is driven by the motor based on a detection result of the vibration detection unit together with power detected by the power detection circuit.
A motor device comprising a motor and a terminal box housing a connection terminal for connecting the motor to an alternating current power supply, comprising:
- a power detection circuit that detects power to be supplied to the motor;
- a control unit that executes predetermined control if a load abnormality related to the motor or a driven device that is driven by the motor is detected based on power detected by the power detection circuit;
- and
- a temperature detection unit that detects temperature of the motor device, wherein
- the power detection circuit and the control unit are housed in the terminal box, and
- the control unit detects an abnormality of the motor device or a driven device that is driven by the motor based on a detection result of the temperature detection unit together with power detected by the power detection circuit.
A motor device comprising a motor and a terminal box housing a connection terminal for connecting the motor to an alternating current power supply, comprising:
- a power detection circuit that detects power to be supplied to the motor;
- a control unit that executes predetermined control if a load abnormality related to the motor or a driven device that is driven by the motor is detected based on power detected by the power detection circuit;
- and
- a threshold setting switch for setting a power upper limit threshold or a power lower limit threshold to detect overload or light load, wherein
- the power detection circuit and the control unit are housed in the terminal box, and
- the control unit detects a load abnormality by comparing a power upper limit threshold or a power lower limit threshold set by the threshold setting switch with power detected by the power detection circuit.
Dependencies are inferred from the claim text.