US 12,088,225 B2
Method and an arrangement for controlling vibration of a variable frequency drive controlled electric machine
Pedro Rodriguez, Västerås (SE); Rahul Kanchan, Västerås (SE); Omer Ikram Ul Haq, Surahammar (SE); Qimao Liu, Västerås (SE); and Ingo Stroka, Västerås (SE)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Jul. 15, 2022, as Appl. No. 17/812,857.
Claims priority of application No. 21185884 (EP), filed on Jul. 15, 2021.
Prior Publication US 2023/0025973 A1, Jan. 26, 2023
Int. Cl. H02P 23/04 (2006.01); G05D 19/02 (2006.01); H02P 23/00 (2016.01)
CPC H02P 23/0004 (2013.01) [G05D 19/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for controlling vibration of a variable frequency drive controlled electric machine, in which method:
a resonance frequency/frequencies and a stiffness of the electric machine are determined in a ramp up/ramp down test, said ramp up/ramp down test is executed with help of a variable frequency drive;
an amount of damping is determined in an impulse test;
a mechanical transfer function is determined in a steady drive state test;
a vibration control model is determined utilizing said resonance frequency/frequencies, said stiffness, said amount of damping, and said mechanical transfer function; and
vibration of the electric machine is controlled utilizing said vibration control model;
wherein in the step of determining the resonance frequency/frequencies and the stiffness:
the ramp up/ramp down test of the electric machine is executed;
vibration is measured continually during said executed ramp up/ramp down as a first measured vibration data;
the resonance frequency/frequencies is/are determined utilizing said first measured vibration data; and
the stiffness is calculated utilizing said determined resonance frequency/frequencies;
wherein in the step of determining the amount of damping:
an impulse is produced in the impulse test;
vibration is measured continually during said impulse test as a second measured vibration data; and
the amount of damping is calculated utilizing said second measured vibration data.