发明名称 |
Apparatus for utilizing an a.c. power supply to bidirectionally drive a d.c. motor |
摘要 |
Apparatus for using an a.c. power supply to bidirectionally drive a d.c. motor includes a first silicon controlled rectifier (SCR) having a cathode connected to a terminal of the motor and an anode connected to a circuit common junction. A second SCR has an anode connected to the motor terminal and a cathode connected to the common junction. An amplifier circuit including a PNP transistor connected in a common base configuration is connected between the gate of the first SCR and the common junction for selectively enabling or disabling the first SCR. Separate means are provided for selectively applying a signal to the amplifier circuit or to the gate of the second SCR for enabling the rotation of the motor in a first or second direction.
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申请公布号 |
US4739229(A) |
申请公布日期 |
1988.04.19 |
申请号 |
US19870098578 |
申请日期 |
1987.09.18 |
申请人 |
EASTMAN KODAK COMPANY |
发明人 |
HEILER, JR., LEO R. |
分类号 |
H02P7/295;H02P7/00;(IPC1-7):H02P1/22 |
主分类号 |
H02P7/295 |
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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