The three speeds of an electric motor are actually the same as a three-speed asynchronous motor. Today, we will learn together about the control circuit for controlling a three-speed motor using a time relay.
I. Learning Objectives:
1. Understand the automatic control of a three-speed asynchronous motor.
2. Able to analyze the working principle of the control circuit for automatic control of a three-speed asynchronous motor using a time relay.
II. Learning Focus:
Automatic control principle of a three-speed asynchronous motor
III. Learning difficulties:
Analysis of the working principle of the three-speed motor with automatic time control
IV. Learning Content:
(a) Circuit for controlling the starting of a three-speed asynchronous motor using a time relay
V. Summary:
This paper mainly describes the control circuit of a three-speed motor using a time relay. By comparing the circuit of manually controlling a three-speed motor with a push-button contactor, it can be seen that adding a timer makes the circuit more complex, but also more powerful!
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