Why is a direct current supplied to the control part of the motor circuit?
Such a question, we have an electric motor circuit, there is a control part of the circuit, but there is a power one. Question: why is it more expedient to apply alternating current to the power part of the circuit, and direct current to the control part? Interested in more about the manager.
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Hello! Well, the current that feeds the engine is chosen for power, which is natural. But about management you misunderstand. There is no "more expedient" or "inexpedient" here, there are requirements for the operating conditions of the circuit and electromagnetic compatibility, and so on. In most cases, AC control circuits are used if there is no unnecessary need. In transport, on the contrary, DC switching devices are used - this is due to the battery power system and the on-board network. Direct current electromagnets, namely, it is a coil and the principle of operation of relays and other EM switching devices is based on it, they produce a significantly greater pulling force than alternating current EM.