To maximize a power consumption reduction effect in a case of using a high-efficiency induction motor, when a conventional induction motor is changed to a high-efficiency induction motor, a mechanical device including an induction motor and a speed reduction mechanism related to the present inventio
To maximize a power consumption reduction effect in a case of using a high-efficiency induction motor, when a conventional induction motor is changed to a high-efficiency induction motor, a mechanical device including an induction motor and a speed reduction mechanism related to the present invention increases the reduction ratio of the speed reducer such that the rotation speed of the mechanical device is equal to that in a case of using a conventional induction motor and thus the output of the mechanical device is made equal to that in a case of using a conventional inductor motor; therefore, the load conditions of the mechanical device such as a pump and a fan can be made equal to those in a case of using a conventional induction motor. Accordingly, the power consumption reduction effect by improving the efficiency of the induction motor can be maximized.
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1. A mechanical device comprising: an induction motor that rotates a small-diameter pulley; anda device including a rotation mechanism having a large-diameter pulley driven by a rotation operation of the small-diameter pulley connected thereto, said large diameter pulley being driven by rotation of
1. A mechanical device comprising: an induction motor that rotates a small-diameter pulley; anda device including a rotation mechanism having a large-diameter pulley driven by a rotation operation of the small-diameter pulley connected thereto, said large diameter pulley being driven by rotation of said small diameter pulley in accordance with a reduction ratio, which is a ratio of a diameter of said large diameter pulley to a diameter of said small diameter pulley, whereinan increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is offset in the large-diameter pulley by increasing said reduction ratio, andan increase in a rotation speed of the large-diameter pulley due to the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is suppressed,wherein said reduction ratio is increased by an amount equal to or larger than 1.0% and equal to or smaller than 6.0% depending on the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor. 2. The mechanical device according to claim 1, wherein the reduction ratio increase is determined on a basis of a secondary resistance of the induction motor. 3. The mechanical device according to claim 2, wherein the secondary resistance of the induction motor is calculated by a lock test. 4. The mechanical device according to claim 1, wherein the reduction ratio increase is determined on a basis of a ratio of a rated rotation speed of the high-efficiency induction motor and a non-high efficiency induction motor. 5. A mechanical device comprising: an induction motor that rotates a small-diameter gear; anda device including a rotation mechanism having a large-diameter gear driven by a rotation operation of the small-diameter gear connected thereto, said large diameter gear being driven by rotation of said small diameter gear in accordance with a reduction ratio, which is a ratio of a diameter of said large diameter gear to a diameter of said small diameter gear, whereinan increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is offset in the large-diameter gear by increasing said reduction ratio, andan increase in a rotation speed of the large-diameter gear due to the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is suppressed,wherein said reduction ratio is by an amount equal to or larger than 1.0% and equal to or smaller than 6.0% depending on the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor. 6. The mechanical device according to claim 5, wherein the reduction ratio increase is determined on a basis of a ratio of a secondary resistance of the high-efficiency induction motor and a non-high-efficiency induction motor. 7. The mechanical device according to claim 6, wherein the secondary resistance of the induction motor is calculated by a lock test. 8. The mechanical device according to claim 5, wherein the reduction ratio of the induction motor is determined on a basis of a ratio of a rated rotation speed of the high-efficiency induction motor and a non-high-efficiency induction motor. 9. A mechanical device comprising: an induction motor that rotates a small-diameter pulley; anda device including a rotation mechanism having a large-diameter pulley driven by a rotation operation of the small-diameter pulley connected thereto, said large diameter pulley being driven by rotation of said small diameter pulley in accordance with a reduction ratio, which is a ratio of a diameter of said large diameter pulley to a diameter of said small diameter pulley, whereinan increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is offset in the large-diameter pulley by reducing a frequency of a power supply that supplies power to the induction motor, andan increase in a rotation speed of the large-diameter pulley due to the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is suppressed,wherein the frequency reduction of said power supply is determined to be equal to or larger than 1.0% and equal to or smaller than 6.0% depending on the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor. 10. A mechanical device comprising: an induction motor that rotates a small-diameter gear; anda device including a rotation mechanism having a large-diameter gear driven by a rotation operation of the small-diameter gear connected thereto, said large diameter gear being driven by rotation of said small diameter gear in accordance with a reduction ratio, which is a ratio of a diameter of said large diameter gear to a diameter of said small diameter gear, whereinan increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is offset in the large-diameter gear by reducing a frequency of a power supply that supplies power to the induction motor, andan increase in a rotation speed of the large-diameter gear due to the increment in a rotation speed caused by using a high-efficiency induction motor as the induction motor is suppressed,wherein the frequency reduction of said power supply is determined to be equal to or larger than 1.0% and equal to or smaller than 6.0% depending on the increment in a rotation speed caused by using the high-efficiency induction motor as the induction motor. 11. A mechanical device comprising: an induction motor; anda speed reducer comprising a large diameter gear driven in response to rotation of a small diameter and a small diameter gear, said large diameter gear being driven by rotation of said small diameter gear in accordance with a reduction ratio, which is a ratio of a diameter of said large diameter gear to a diameter of said small diameter gear, whereinthe reduction ratio of the speed reducer is increased such that a rotation speed of the mechanical device itself in which a non-high-efficiency induction motor is changed to a high-efficiency induction motor is equal to a rotation speed in a case of using a non-high-efficiency induction motor before a change,wherein the reduction ratio, is increased by an amount equal to or larger than 1.0% and equal to or smaller than 6.0% depending on the increment in a rotation speed caused by using the high-efficiency induction motor as the induction motor.
Satake Satoru,JPX ; Hidaka Manabu,JPX ; Kumamoto Kazuo,JPX ; Masaki Tadashi,JPX, Driving means formed by induction motor and method for starting the same.
Satake Satoru,JPX ; Hidaka Manabu,JPX ; Kumamoto Kazuo,JPX ; Masaki Tadashi,JPX, Driving means formed by induction motor and method for starting the same.
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