Electric machine unit, vehicle and method of operating an electric machine unit

An electric machine unit has an electric machine with two phase groups of at least one phase each and having a power converter, the power converter having two half-bridge groups of at least one half-bridge in each case, each phase group being assigned one half-bridge group, so that one half-bridge is provided per phase connection of the electrical machine. The power converter has DC voltage terminals which are configured for connection to an energy storage, the phase terminals of a first phase group each being connected via an AC switch to the respectively associated half-bridge of a first half-bridge group, the phase terminals of a second phase group each being connected to the respectively associated half-bridge of a second half-bridge group, DC-voltage-side terminals of the half-bridges of the second half-bridge group each being connected to the DC terminals via a DC switch.