发明名称 |
STEUERSCHALTUNG FUER ELEKTRISCH BETRIEBENE FAHRZEUGE |
摘要 |
<p>In an electric car, wherein the powering drive and the braking drive are executed by on-off controlling a current through a d. c. motor by means of a chopper, when the electric car is below a predetermined speed, a field coil of the d. c. motor is put into a series winding connection so as to carry out full field control, and when the car is above the predetermined speed, the field coil of the d. c. motor is changed-over to a shunt winding connection so as to carry out weak field control.</p> |
申请公布号 |
DE2731501(A1) |
申请公布日期 |
1978.01.19 |
申请号 |
DE19772731501 |
申请日期 |
1977.07.12 |
申请人 |
HITACHI,LTD. |
发明人 |
HORIUCHI,MICHIMASA;NARITA,HIROSHI;TSUBOI,TAKASHI |
分类号 |
B60L15/28;H02P7/29;H02P7/298;(IPC1-7):B60L15/04 |
主分类号 |
B60L15/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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