Technical introduction | Bode Plot principles The following illustration shows an example of the frequency response of a motor with no load, no resonance points and a rather high bandwidth. The closed loop is used for the determination of the bandwidth, while the open loop is regarded for calculating the gain response. The bandwidth is read where the gain response first crosses the -3 dB or the phase response first crosses the -90° line. The higher the bandwidth of a system, the more stable it is and the higher the control loop gain can be set. This results in higher dynamics. The following figure shows a typical response with resonance points:
a response with two resonance points and a narrow bandwidth. TE132x 12 Version: 1.3.0