| 摘要 |
A transformer for dc motor control comprises a bridge inverter, a first diagonal of which is connected with poles of a power supply source through a smoothing filter; and to a second diagonal, a dc motor is connected, one of diode terminals is connected to a first pole of the power supply source, an electronic switch connected by a second terminal to a second pole of the power supply source, a control unit, outputs of which are connected with control inputs of the inverter bridge and an electronic switch. In addition, a first and a second additional diodes, an energy accumulation element, ballast and auxiliary resistors are incorporated in the said device; to the second diagonal of the bridge, a first and a second additional diodes are connected via the similar terminals, second terminals of which are connected to a subsidiary input of the control unit, via the auxiliary resistor are connected with the smoothing filter output, with the second diode terminal, with one of terminals of the energy accumulation element, second terminal of which is connected with a second pole of power supply source... |
