Method and device for interrupting a charging process of a power source of an electric drive

A device (120) for interrupting a charging process of a power source (230) of an electric drive (200),

• wherein the electric drive (200) comprises an inverter (210) and a multi-phase electric machine (220), wherein the inverter (210) on the input side comprises a positive input terminal (212) and a negative input terminal (214) for connecting the power source (230), wherein a fuse (260) is arranged between the positive terminal of the power source (230) and the positive input terminal (212) of the inverter,
• wherein the inverter comprises a multi-phase terminal (215) on the output side for connecting the multi-phase electric machine (220), wherein the inverter (210) comprises a plurality of circuit breakers (231. 236),
• wherein the circuit breakers (231. 236) are arranged in half-bridges connected in parallel as highside switches and lowside switches, and the half-bridges are connected between the positive input terminal (212) and the negative input terminal (214) of the inverter, wherein a center tap of a half-bridge is connected between the respective highside switch and lowside switch to a phase of the multi-phase terminal (215), wherein the inverter is configured to supply the electric machine (220) with electrical power in a motor operation and to receive electrical power of the electric machine (220) in a generator operation,
• wherein at least one of the windings of the multi-phase electric machine (220) comprises a winding terminal (228) and the winding terminal (228) of the electric machine (220) is connected to a motor terminal (240),
• wherein the motor terminal (240) is connected to a positive charging terminal (216), and the negative input terminal (214) is connected to a negative charging terminal (218),
• wherein during the charging process of the power source (230), a charging power source (250) is connected to the positive charging terminal (216) and the negative charging terminal (218), and provides electrical power via the inverter (210) of the power source

A non-transitory, computer-readable storage medium comprising instructions which, when executed by a computer cause the computer to control a power source (230) of an electric drive (200),

• wherein the electric drive (200) comprises an inverter (210) and a multi-phase electric machine (220), wherein the inverter (210) on the input side comprises a positive input terminal (212) and a negative input terminal (214) for connecting the power source (230),
• wherein a fuse (260) is arranged between the positive terminal of the power source (230) and the positive input terminal (212) of the inverter, wherein the inverter comprises a multi-phase terminal (215) on the output side for connecting the multi-phase electric machine (220), wherein the inverter (210) comprises a plurality of circuit breakers (231. 236), wherein the circuit breakers (231. 236) are arranged in half-bridges connected in parallel as highside switches and lowside switches, and the half-bridges are connected between the positive input terminal (212) and the negative input terminal (214) of the inverter, wherein a center tap of a half-bridge is connected between the respective highside switch and lowside switch to a phase of the multi-phase terminal (215), wherein the inverter is configured to supply the electric machine (220) with electrical power in a motor operation and to receive electrical power of the electric machine (220) in a generator operation, wherein at least one of the windings of the multi-phase electric machine (220) comprises a winding terminal (228) and the winding terminal (228) of the electric machine (220) is connected to a motor terminal (240),
• wherein the motor terminal (240) is connected to a positive charging terminal (216), and the negative input terminal (214) is connected to a negative charging terminal (218),
• wherein during the charging process of the power source (230), a charging power source (250) is connected to the positive charging terminal (216) and the negative charging terminal (218), and provides electrical power via the inverter (210) for charging the power source (230),
• by:
• detecting (510) a fault on a highside switch (231, 233, 235) of a first half-bridge of the inverter (210);
• and
• closing (520) a lowside switch (232, 234, 236) of a half-bridge of the inverter (210).