Three-phase asynchronous motor with a multimeter to detect the parameters of the method
First of all you need to know how to use the multimeter, after understanding how to use the multimeter, naturally you will use the multimeter to measure the parameters you need.
Take my digital multimeter as an example, the multimeter is mainly divided into two parts: the body and the pen, the pen is very simple, just two pens, a red pen and a black pen; the body of the table, including the head of the screen, the conversion knob, the pen socket.
The top part of the watch body is the display, which can show all the values we measured;
The buttons below the display, the yellow one is the on/off button, the one above the on/off button is the AC conversion, and the light blue one is to light up the screen;
The middle part of the multimeter is the conversion knob, used to convert a variety of gears, above the meaning of the various character representatives are: in turn, AC voltage, DC voltage, Ω file (resistance) and diode test, frequency, temperature, capacitance, AC/DC / microamp, AC/DC / mA, AC/DC / amp;
The bottom part of the multimeter body is the pen socket, from left to right a total of four sockets, respectively, is the current Ampere (note that there is a current through the time requirements), current milliampere microampere (also pay attention to the requirements of the current through the time), COM is also known as the common terminal, voltage resistance diode; which COM holes inserted in the black pen, the remaining three holes are inserted in the red pen;
In addition, we note that each multimeter above the labelling is not the same, but the characters represent the same meaning. Other keys are seldom used and will not be introduced one by one.
In the measurement of the motor, generally is to detect the motor terminals between the phase and phase is short-circuited, the total meter adjusted to Ω ohm gear, terminal two two with the multimeter measurement, see whether the resistance value is not much difference between the resistance value into the description of the motor is normal, the same and then measure the terminals and shell is not short-circuited, if the resistance is infinite is normal. If you want to know the wiring of the motor, look at the motor on the nameplate can be.
