Title:
ENERGY SAVING CONTROL METHOD AND DEVICE FOR INDUCTION MOTOR BY LOAD FOLLOWING
Document Type and Number:
WIPO Patent Application WO/2016/098373
Kind Code:
A1
Abstract:
In the load following method according to the present invention, the load factor and the rotation speed of an induction motor are detected to constantly match the input power of the motor to the load, and relevant parameters of the motor are adjusted in accordance with the fluctuating load factor and an arbitrary rotation speed of the motor. In order to accomplish a highly efficient and energy saving motor operation in the entire range, a load following control device (18): obtains an operating load factor in real time by using units (9, 8) that calculate the load factor; obtains a power factor (PF) by using a power factor PF calculation (4); obtains a reactive current (Is) by using an Is calculating algorithm (5); calculates a control amount (Isk) for the reactive current and a control amount (PFk) for the power factor by using a reactive current Is minimization control (2) and a PF control (3), respectively; inputs a frequency (rotation speed) control amount (Fq) to a fluctuating V/F calculating algorithm (6) by using a V/F setting unit (1) to calculate an optimized voltage control amount (Ud); adjusts the waveform of an SPWM generation (7) by using the optimized voltage control amount (Ud) and the frequency (rotation speed) control amount (Fq); and adjusts the input power of the induction motor (17), by using a power adjusting unit (14), so as to automatically be the minimum value, and to be in a highly efficient energy saving condition.
Inventors:
SHINO IKOKU (JP)
Application Number:
PCT/JP2015/068104
Publication Date:
June 23, 2016
Filing Date:
June 23, 2015
Export Citation:
Assignee:
SHINO IKOKU (JP)
International Classes:
H02P27/06
Foreign References:
| JPH01311889A | 1989-12-15 | |||
| JPH0295197A | 1990-04-05 | |||
| JPS5388115A | 1978-08-03 | |||
| JPS62201085A | 1987-09-04 | |||
| JPH06261597A | 1994-09-16 | |||
| US4207510A | 1980-06-10 |
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