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AssigneeKito Corporation
InventorsTatsuru Yamamoto, Takuma Isshiki
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To provide a single-phase induction motor control method and apparatus and an electric chain block which are capable of appropriately judging an overload of a single-phase induction motor even when the single-phase induction motor is in a condition where energization of an auxiliary coil is repeated. Provided is a method of controlling a single-phase induction motor including a main coil ML, an auxiliary coil AL, a capacitor C, and an SSR (solid-state relay) power circuit 121, in which the main coil ML is supplied with an electric current from a single-phase alternating-current power supply 200 through the SSR power circuit 121, and when the load is heavy, the auxiliary coil AL is energized. An overload is judged based on the ratio of energizing time during which the auxiliary coil AL is energized within a predetermined time.
A single-phase induction motor control method of controlling a single-phase induction motor including a main coil, an auxiliary coil, a capacitor, and a driving circuit, the method comprising:
A single-phase induction motor control apparatus for controlling a single-phase induction motor including a main coil, an auxiliary coil, a capacitor, and a driving circuit, wherein the main coil is supplied with an electric current from a single-phase alternating-current power supply through the driving circuit, and the auxiliary coil is supplied with an electric current from the single-phase alternating-current power supply through the driving circuit and via the capacitor, the single-phase induction motor control apparatus is configured to judge that the single-phase induction motor is overloaded in response to electric power supplied to the main coil exceeding a predetermined overload judgment threshold value;
A single-phase induction motor control method of controlling a single-phase induction motor including a main coil, an auxiliary coil, a capacitor, and a driving circuit, the method comprising:
A single-phase induction motor control method of controlling a single-phase induction motor including a main coil, an auxiliary coil, a capacitor, and a driving circuit, the method comprising:
A single-phase induction motor control apparatus for controlling a single-phase induction motor including a main coil, an auxiliary coil, a capacitor, and a driving circuit, wherein the main coil is supplied with an electric current from a single-phase alternating-current power supply through the driving circuit, and the auxiliary coil is supplied with an electric current from the single-phase alternating-current power supply through the driving circuit and via the capacitor, the single-phase induction motor control apparatus is configured to judge that the single-phase induction motor is overloaded in response to electric power supplied to the main coil exceeding a predetermined overload judgment threshold value;
A single-phase induction motor control apparatus for controlling a single-phase induction motor including a main coil, an auxiliary coil, a capacitor, and a driving circuit, wherein the main coil is supplied with an electric current from a single-phase alternating-current power supply through the driving circuit, and the auxiliary coil is supplied with an electric current from the single-phase alternating-current power supply through the driving circuit and via the capacitor, the single-phase induction motor control apparatus is configured to judge that the single-phase induction motor is overloaded in response to electric power supplied to the main coil exceeding a predetermined overload judgment threshold value;
Dependencies are inferred from the claim text.