| 摘要 |
The invention relates to a device (1) to which a three-phase supply network (9) can be connected. In order to provide an improved internal power supply for such a device, according to the invention the device (1) comprises a third capacitor (3), a secondary coil (23), a diode (6) and, per phase (91, 92, 93), a conductor (81, 82, 83) and a circuit, the secondary-side coil (23) is connected in parallel to the third capacitor (3) via the diode (6), the circuit comprises a measuring resistor (30), a first and second capacitor (11, 12), a self-conducting field effect transistor (13) and a first and second primary-side coil (21, 22) and the circuit is designed such that: the measuring resistor (30) is located in the conductor, the first capacitor (11) is connected parallel to the measuring resistor (30), a serial circuit of the first primary-side coil (21) having the self-conducting field effect transistor (13) is connected in parallel to the first capacitor (11), an energy transfer occurs from the first primary-side coil (21) to the second primary-side coil (22) and to the secondary-side coil (23), the second capacitor (12) is connected in parallel to the second primary-side coil (22), the second capacitor (12) is connected to the source connection (132) of the self-conducting field effect transistor (13), the gate connection (131) of the self-conducting field effect transistor (13) is connected on the second capacitor (12). |
