1. A suitable resistive load is connected in parallel at both ends of the resistance of the DC geared motor, and the resistance of the resistive load becomes nonlinear after heating, so that the field resistance line and the initial section of the excitation characteristic have a larger angle of intersection. Obtain an obvious intersection with the no-load characteristic curve, so that the DC geared motor will have a stable operating point at a lower voltage.
2. Padded benign magnetic materials under the pole shoes to reduce the gap of the excitation magnetic field, so that the output characteristics can be saturated when the excitation current is small, so that its output voltage can be stabilized.
3. The automatic excitation adjustment device of the generator is adopted, because it has good excitation characteristics and has multiple adjustment methods such as constant reactive power and constant power factor, which is very effective in improving the stability of the system and the ability of transient response.
In order to ensure that the DC geared motor can work normally and stably, it is necessary to do a detailed inspection before starting to use to ensure that the motor has no faults before starting. At the same time, pay more attention to its running status during a period of time when the motor has just started to run. In case of abnormality, immediately shut down for maintenance to avoid unknown hazards.
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