Dc motor speed regulation principle is what if I don't consider the core saturation when factors such as the ideal relationship, but the analysis of the actual dc motor has guiding significance. According to the formula can be concluded that there are three kinds of dc motor speed control methods: adjust the excitation current, regulate the armature voltage and adjust the resistance of series with the armature circuit. Regulate the armature circuit of series resistance method is easy, but the energy consumption; In series resistance, because of the small load current voltage drop is small, so the speed setting is not very sensitive. Regulate the armature terminal voltage and appropriately adjust the excitation current, can make the dc motor in a wide range speed control smoothly. Terminal voltage increased by raising speed, excitation current increase reduce speed, and both cooperate proper, can make the motor run under different rotational speed. Should pay attention to the high speed running, the reversing conditions deteriorate, cooling conditions deteriorate during low speed running, limiting the power of the motor. Series dc motor because of its mechanical properties close to constant power characteristics, when low speed large torque, so widely used in electric vehicle traction, the trolley is commonly used in two or more than two compound of both series and shunt dc motor driven. Using the method of series, in parallel to pick up the motor terminal voltage changes exponentially (Half the time of the series voltage of the motor only parallel, thus can get a wider range of speed regulation and economically reduce the power consumption when starting. Dc motor speed regulation is much simpler than ac asynchronous motor, as long as can achieve speed change voltage. Prove that the method is very simple, find a toy on the small motor, with a battery can make its turn, just the speed is not high, with 2 batteries speed will be much higher. Speed control principle to use a lot of formulas, caption also has a long, non-professionals don't need to understand that, just remember dc motor voltage adjustment speed is enough. The most common application is city of trolley buses and electric bicycle. Pay more attention to details step progress motor in shenzhen, Shanghai four macro electric appliance co. , LTD. WWW. bohongmotor。 Com the main products: stepper motor, brushless motor, servo motor, stepping motor drive, brake motor, linear motor and other kinds of models of the stepper motor, welcome to inquire. Telephone:
