| 摘要 |
The invention discloses an electrical circuit for controlling by closed-loop control and open-loop control, in the electromagnetic lathe (100), the starting current, the operating current, the rotational speed, the power, the power factor, the torque and the voltage in a manner that saves more energy. In control electronics (11) via a rectifying or converting switching part (21), the current of the rotor winding of the primary machine (2) either firstly is short-circuited via a semiconductor switch (22), which effects short-circuiting preferably in a pulse-width-modulated fashion, or secondly, with the semiconductor switch (22) open, is switched via a further rectifying or converting switching part in the secondary circuit (23) to a storage device (24) and via an inverter for the BLDC machine (30) to the BLDC machine. |
