Invention Grant
- Patent Title: Electric machine
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Application No.: US16626384Application Date: 2018-06-14
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Publication No.: US11223314B2Publication Date: 2022-01-11
- Inventor: Jochen Kurfiss , Ulrich Vollmer
- Applicant: Robert Bosch GmbH
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agency: Maginot, Moore & Beck LLP
- Priority: DE102017212574.8 20170721
- International Application: PCT/EP2018/065892 WO 20180614
- International Announcement: WO2019/015894 WO 20190124
- Main IPC: H02P1/18
- IPC: H02P1/18 ; H02P27/08 ; H02P21/22 ; H02M7/5387 ; H02P23/00 ; H02P25/22

Abstract:
An electric machine, in particular an electric motor and/or generator, has a stator and a rotor which is designed to be permanently magnetic or to be energized in particular. The machine has at least two sub-machines. Each of the sub-machines has the same number of phases. The machine has a power output stage for each sub-machine, and the machine also has at least one control unit which is connected to the power output stages. The control unit is designed to generate a pulse width-modulated signal for actuating the power output stages. The control unit is designed to generate the PWM signal for the sub-machines such that an ascending or descending side of a PWM pulse for one sub-machine, said side representing a switching time in each case, and a pulse center of a PWM pulse for another sub-machine of the sub-machines are delayed relative to each other.
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