The motor you are talking about is used in machines, Z4 series motors. These motors typically cost thousands, tens of thousands, or hundreds of thousands. The ones sold on Taobao are not very good and are not suitable. However, for DC motors we only advertise online and generally sell very few directly.
The generator regulator purchased on Taobao works. Generator regulators are usually automatic voltage regulators. As the generator output load increases, the generator voltage decreases. When the load is a motor, the current will be larger when the motor starts, which will cause the generator voltage to fluctuate, requiring automatic voltage. Home generators should be equipped with automatic voltage regulators. Generally, automatic voltage regulators of small generatorspower include thyristor regulators and compound phase excitation automatic voltage regulators. They all use the principle of negative voltage feedback, that is, when the voltage decreases, the excitation current increases, so the voltage does not drop too much, there is a power compensation part reactive, etc.