US 12,445,067 B2
Electric drive unit for an electric handheld power tool and electric handheld power tool having an electric drive unit
Christian Augustin, Poettmes (DE); Xiaodong Zhang, Munich (DE); and Walter Wissmach, Munich (DE)
Assigned to Hilti Aktiengesellschaft, Schaan (LI)
Appl. No. 18/555,783
Filed by Hilti Aktiengesellschaft, Schaan (LI)
PCT Filed May 5, 2022, PCT No. PCT/EP2022/062221
§ 371(c)(1), (2) Date Oct. 17, 2023,
PCT Pub. No. WO2022/243059, PCT Pub. Date Nov. 24, 2022.
Claims priority of application No. 21174116 (EP), filed on May 17, 2021.
Prior Publication US 2024/0213893 A1, Jun. 27, 2024
Int. Cl. H02P 3/18 (2006.01); H02P 3/10 (2006.01); H02P 3/12 (2006.01); H02P 7/03 (2016.01); B25F 5/00 (2006.01)
CPC H02P 3/10 (2013.01) [H02P 3/12 (2013.01); H02P 7/04 (2016.02); B25F 5/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric drive unit for an electric handheld power tool, the electric drive unit comprising:
an electric motor with a stator winding and a rotor winding;
an actuating circuit for actuating the electric motor; and
a connection unit for coupling an energy source for driving the electric motor,
the stator winding being connected via a first node to a stator-side first half-bridge including a first semiconductor component and a second semiconductor component and connected via a second node to the rotor winding,
the rotor winding being connected to a third node connected via a conductive component to the connection unit,
the actuating circuit including a third semiconductor component connected via the second node to the rotor winding and the stator winding and connected via a fourth node directly to the connection unit.