The servo system controls the motor speed by the speed loop; the speed of the motor, the DC motor determines the voltage level, and the AC motor determines the frequency; therefore, the regulator output of the speed loop controls the frequency of the AC motor, or controls the DC motor. Voltage; How does the speed loop detect the speed of the motor? It should be said that the speed detection depends on the encoder; because the encoder’s feedback pulse frequency = encoder resolution & times; motor speed, the speed of the motor is proportional to the encoder feedback pulse frequency!
That is to say, the speed loop detection feedback is the frequency of the encoder pulse; then, to give the motor speed, the frequency of the encoder pulse must be given; as long as the frequency of the encoder pulse is given, the speed of the motor is given; There is no encoder feedback pulse frequency setting on the operation panel, only the setting of the command pulse frequency is the S1 that the landlord said;
Because the electronic gear ratio = encoder resolution / week command pulse number,
So the number of weekly command pulses = encoder resolution / electronic gear ratio
So the number of weekly command pulses × motor speed = encoder resolution × motor speed / electronic gear ratio
And because the number of weekly command pulses × motor speed = command pulse frequency, encoder resolution × motor speed = encoder pulse frequency
So command pulse frequency = encoder pulse frequency / electronic gear ratio
So set the command pulse frequency, that is, set the encoder pulse frequency, that is, set the motor speed in the speed loop.
So our conclusion is that the user only needs to set the command pulse frequency S1 on the operation panel, that is, set the servo motor speed on the speed loop!
As long as the user sets the command pulse frequency S1 on the operation panel, the motor speed is set on the speed loop! Do not change the pulse equivalent, electronic gear ratio, and weekly command pulse number that have been set; then the upper limit of the command pulse frequency is the rated technical frequency of the position loop counter (or the rated frequency of the PLC pulse that everyone says); then the command pulse frequency The upper limit corresponds to the upper limit of the motor speed!
Command pulse frequency = number of weekly command pulses × motor speed; with the motor speed (r/s), the command pulse frequency can be calculated.
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