Electric circuit for an electric motor , wherein the electric motor has at least one stator with at least three coils and one rotor with at least two magnetic poles ; wherein the motor can be operated by the electric circuit at least in the following two states : a) in a first state , respectively different currents of a three-phase system can be applied to the coils and the rotor can be caused to rotate about an axis of rotation ; b) in a second state , an in-phase alternating current can be applied to the coils ; wherein the electric circuit has at least one first potential connection and one second potential connection which can be connected to different potentials of a DC voltage source , wherein the electric circuit comprises three half-bridges between the potential connections , wherein each coil can be connected in an electrically conductive manner to one half-bridge in each case via one first connection in each case and can be connected in an electrically conductive manner to the other coils via one second connection in each case; wherein the electric circuit has a fourth half-bridge between the potential connections , which fourth half-bridge can be connected in an electrically conductive manner to a star point connecting the second connections ; wherein each half-bridge has at least one upper transistor and one lower transistor which are connected to one another in an electrically conductive manner; wherein the upper transistor is connected in an electrically conductive manner to the first potential connection and the lower transistor is connected in an electrically conductive manner to the second potential connection ; wherein each half-bridge has a contact-connection between the upper transistor and the lower transistor , which contact-connection can be used to connect the respective one connection to the respective half-bridge ; characterized in that the electrical circuit , in order to produce the second state , can be operated in such a manner that, on the one hand, the upper transistors of the first half-bridge , of the second half-bridge and of the third half-bridge synchronously connect the first potential connection to the respective first connection in an electrically conductive manner, while the lower transistors of these half-bridges disconnect the respective first connections from the second potential connection ; wherein, in sync with this, the lower transistor of the fourth half-bridge connects the second connection to the second potential connection in an electrically conductive manner; and that, on the other hand, the lower transistors of the first half-bridge , of the second half-bridge and of the third half-bridge synchronously connect the second potential connection to the respective first connection in an electrically conductive manner, while the upper transistors of these half-bridges disconnect the respective first connections from the first potential connection ; wherein, in sync with this, the upper transistor of the fourth half-bridge connects the second connection to the first potential connection in an electrically conductive manner; wherein the electrical circuit has at least one capacitor which can be used to connect the star point to the fourth half-bridge . a) in a first state , respectively different currents of a three-phase system can be applied to the coils and the rotor can be caused to rotate about an axis of rotation ; b) in a second state , an in-phase alternating current can be applied to the coils ; <EOS>