US 12,081,148 B2
Gear control circuit and system for alternating current motor, switch controller, and electronic device
Hongyu Ran, Suzhou (CN); Yan Zhang, Suzhou (CN); Yigang Liu, Suzhou (CN); Mingming Wei, Suzhou (CN); and Hongqiang Li, Suzhou (CN)
Assigned to BEIANG AIR TECH LTD., Jlangsu (CN)
Appl. No. 17/794,610
Filed by BEIANG AIR TECH LTD., Suzhou (CN)
PCT Filed Nov. 12, 2021, PCT No. PCT/CN2021/130361
§ 371(c)(1), (2) Date Jul. 21, 2022,
PCT Pub. No. WO2022/193696, PCT Pub. Date Sep. 22, 2022.
Claims priority of application No. 202110299651.5 (CN), filed on Mar. 19, 2021; and application No. 202110299653.4 (CN), filed on Mar. 19, 2021.
Prior Publication US 2023/0327590 A1, Oct. 12, 2023
Int. Cl. H02P 21/18 (2016.01); F16H 61/02 (2006.01); H02P 27/08 (2006.01)
CPC H02P 21/18 (2016.02) [F16H 61/0213 (2013.01); H02P 27/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A gear control circuit for an alternating current motor, the gear control circuit comprising:
a plurality of controllable switches, the controllable switches being connected to a live wire of an alternating current power supply and being connected to a plurality of gears of an alternating current motor in a one-to-one correspondence;
a detection unit, connected to the controllable switches, and configured to detect switching statuses corresponding to the controllable switches;
a gear input unit, configured to receive a target gear m inputted from outside; and
a control unit, connected to the gear input unit and configured to obtain the target gear m, wherein the control unit is further connected to the controllable switches and the detection unit and configured to obtain a current gear n of the alternating current motor according to the switching statuses of the controllable switches; if m is greater than n, the control unit controls controllable switches corresponding to all gears between n and m to be sequentially turned on in an ascending order of the gears and turns off a controllable switch corresponding to a gear i−1 after a controllable switch corresponding to a gear i is turned on; and if m is less than n, the control unit controls controllable switches corresponding to all gears between m and n to be sequentially turned on in a descending order of the gears and turns off a controllable switch corresponding to a gear i+1 after a controllable switch corresponding to a gear i is turned on.