| 摘要 |
<p>1,234,859. Switching systems; control of D.C. motors. MITSUBISHI DENKI K.K. 8 July, 1969 [8 July, 1968], No. 34319/69. Headings H2H and H2J. A D.C. supply circuit, for example for controlling the motors of an electric vehicle, includes two control units connected between a positive terminal and an intermediate terminal, and the intermediate terminal and a negative terminal, respectively. One or more loads are connected to output terminals on the control units, In the embodiment shown, a capacitive voltage divider 40a, 40b is connected across the D.C. source 10, and the control units 20a, 20b each comprise a thyristor 21a, 21b in series with an oppositely poled diode 22a, 22b. Loads M are serially connected to each other between the output terminals of the control units. The thyristors may be switched with a predetermined phase difference between them. In other arrangements, the loads may be connected to either of the end terminals of the D.C. source and the thyristors may be replaced by transistors in the control units. Coupled inductive windings may also be connected to the loads in order to reduce ripple, Fig. 10 (not shown).</p> |
