Electronic Power Circuit, Electric Motor, And Procedure For Checking The Operability Of An Electronic Power Circuit

An electronic power circuit having

• a power unit with at least one power semi-conductor switch, which is equipped to generate a pulsed electrical voltage for an electrical consumer from an electrical voltage on the basis of an alternating powering on and off of the at least one power semiconductor switch, and
• control electronics equipped to control the power semiconductor switch for the alternating powering on and off and having an optical coupler with an input stage designed as a light emitter and with an output stage designed as a light receiver, a first semiconductor switch connected parallel to the light emitter, and a second semiconductor switch connected in series to the parallel circuit consisting of the first semiconductor switch and the light emitter, wherein the first semiconductor switch is provided to be opened and closed alternately in accordance with a pulse pattern so that in correspondence with the pulse pattern an electrical current flows through the light emitter and as a result the light emitter emits light in correspondence with the pulse pattern, said light which the light receiver receives in order to generate a corresponding control signal for the at least one power semiconductor switch.