The motor generator set adjusts the output voltage by adjusting the generator's excitation electric roller

The motor generator set is driven by the motor to rotate the synchronous bear motor by the motor to adjust the output voltage of the generator by adjusting the generator's excitation current. The advantages of this method are sufficient to make even and smooth. It can not be affected by the power and voltage flow. The well can supply a sinusoidal voltage crossing shape (Figure 1).

When using a motor generator set, the following points should be paid attention to:
① In order to supply a sine waveform voltage crossing. The generator must be a specially designed sinusoidal generator.
② In order to deal with residual pressure caused by the residual magnetism of the magnetic magnetism. To start from zero, try to use a sliding double potentiometer connected to the constant DC electric current to adjust the magnetic breakage.
③Under normal circumstances, only a single-phase generator is needed. However, the series test transformer can sometimes operate in three phases. So a three-phase generator is needed at this time. Because most cases of applying. Still running in single phase. Therefore, it is necessary to test the power of the three-phase operation elbow. It also needs to meet the power needs during single-phase operation. Usually, a three-phase generator is used to run two phases and its output capacity when it runs two phases. The l/√3 of the generator's capacity is equal to the capacity of the test transformer.
④The motors used to drag the generator can be divided into three types: asynchronous motors and synchronous motors and DC motors. If using an asynchronous motor. It is impossible to supply the output voltage of the electric string, but its glutinous rate can be close to that of the electric string t, such as a synchronous motor. The frequency is limited by the electric rate; if a straight-slide motor is used, it can be changed at will. Obtain the various frequencies required. The formula of the motor can be calculated according to the following formula.