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PROTECTION DEVICE FOR THE CONTROL TRANSISTOR OF AN ELECTRIC MOTOR, ASSEMBLY CONSISTING OF SUCH A DEVICE AND ITS ASSOCIATED MOTOR AND USE IN A MOTOR VEHICLE
PROTECTION DEVICE FOR THE CONTROL TRANSISTOR OF AN ELECTRIC MOTOR, ASSEMBLY CONSISTING OF SUCH A DEVICE AND ITS ASSOCIATED MOTOR AND USE IN A MOTOR VEHICLE
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机译:电动机的控制晶体管的保护装置,由该装置及其关联的电动机组装而成的电动机以及在车辆中的使用
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摘要
A DC motor (1) is connected in series with a power transistor (2). An adjustable potentiometer (3), whose tapping determines the base voltage of the power transistor (2), is used to vary the speed of the DC motor (1). In order to protect the power transistor (2) in the event of blocking of the DC motor (1), a comparator (8) is provided with compares the current through the motor (1) with a reference value and controls a relay (9, 10) in such a manner that the power transistor (2) is short-circuited if the current through the DC motor (1) is higher than the reference value. IMAGE
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