Patent SG-11201806441P-A (SG)
Title: Method and apparatus for controlling motion in a counterbalancing system
Inventor: ANDERSON GARRY
IPC: B66B1/34
Filed: 2017-01-27
Abstract: Pretorque State (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (10) International Publication Number (43) International Publication Date WO 2017/132525 Al 3 August 2017 (03.08.2017) WIPO I PCT 11111111111111011011111111111 010 11111 III 0111 11111 0111 11111 0111 1111111E11 0111111 Pretorque applied 1.530 152d,' e .4 4. Rotor Position: • •• • I. W O 20 17 / 13 2525 Al 3 4 5 (51) International Patent Classification: B66B 1/30 (2006.01) B66B 1/34 (2006.01) B66B 1/32 (2006.01) (21) International Application Number: PCT/US2017/015365 (22) International Filing Date: 27 January 2017 (27.01.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/288,776 29 January 2016 (29.01.2016) US (71) Applicant: MAGNETEK, INC. [US/US]; N49 W13650 Campbell Drive, Menomonee Falls, WI 53051 (US). (72) Inventors: ANDERSON, Garry; 176 Wollaston Road, Irchester, Northamptonshire NN29 7DH (GB). KOBISKE, Mark; W279N8724 Twin Pine Circle, Hartland, WI 53029 (US). BACKMAN, John; 8733 Bridge Road, Cedarburg, WI 53012 (US). BUTTE, Ed; W350n3545 Road B, Okauchee, WI 53069 (US). (74) Agent: SCHLEVENSKY, Eric, L.; Boyle Fredrickson, S.C., 840 North Plankinton Avenue, Milwaukee, WI 53203 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Published: with international search report (Art. 21(3)) — (54) Title: METHOD AND APPARATUS FOR CONTROLLING MOTION IN A COUNTERBALANCING SYSTEM (57) : A method and system for reducing -rollback in a counterbalancing system as a holding brake is released is disclosed. A limited amount of movement of a drive shaft is present in. the holding 155 brake. A motor drive provides current to the motor with the holding brake set such that a torque is ap plied at the drive shaft. The current is controlled to generate torque in both directions. The limited amount of movement in the brake may be used to determine a direction and magnitude of torque re- quired to support a mechanical load being applied to the motor. The motor drive then provides a current to generate the necessary torque required to support the load prior to releasing the holding brake. 6: 1 4 1 160 162 164 166 168 170 Fab