Rated Power:10KW Output Type:AC Three Phase Rated Voltage:400V, 120-600V Speed:1500RPM Frequency:50HZ Voltage Regulation:AVR Bearing:Single or Double Insulation class:H Protection Class:IP23
Synchronous generator, that is, an alternator whose rotor rotates at the same speed as the rotating magnetic field of the stator. According to the structure can be divided into two types of rotating armature and rotating magnetic field. When the number of pole pairs is p and the rotor speed is n, the output current frequency is f = np / 60 (Hz).
1. Any permanent magnetic generators, providing invariable excitation on all occasions.
2. Easy to be connected with power network or other generators. Standard 2/3 pitch windings check excessive midline current.
3. Balanced rotor with single or two sealed ball bearings.
4. Convenient installation and maintenance with easy access to terminals, rotating diodes and coupling bolts.
5. Wide range of Flange adaptor and single bearing coupling disc.
6. All industrial standard generators is IP 23.
The external characteristics of a synchronous generator generally refer to the curve of the generator terminal voltage change when the load current changes under the condition that the internal potential is unchanged. It is mainly used to test the vertical axis synchronous reactance of the generator, which is the internal impedance of the generator. It is an important indicator of the load capacity of synchronous generators. However, synchronous generators often use thyristor fast excitation and damping windings, and the vertical axis synchronous reactance is mostly a transient value, which is far less than the steady state value. In addition, due to the regulating effect of the excitation system, the external characteristics can be manufactured manually, which can be positive or negative. The positive external characteristic is that the terminal voltage decreases with the increase of load current, and the negative is that the terminal voltage increases with the increase of load current The general excitation system can be adjusted within the range of plus or minus 15%.
The external characteristic is the relationship between the generator terminal voltage U and the load current I when the speed is the rated value, the excitation current and the load power factor are constant, as shown in Figure 2. The adjustment characteristics are the relationship between the excitation current If and the load current I when the speed and terminal voltage are rated values and the load power factor is constant, as shown in Figure 3. Fig. 2 also shows the situation of three kinds of loads of resistive, capacitive and inductive. Due to the different effects of the armature response magnetic field, the curves of the three are also different. In the external characteristics, the degree of voltage change from no-load to rated load is called the voltage change rate ΔU, which is usually expressed as a percentage.
The voltage change rate of the synchronous generator is about 20 to 40%. General industrial and domestic loads require voltages to remain essentially constant. For this reason, as the load current increases, the excitation current must be adjusted accordingly. Figure 3 shows the adjustment characteristics under three different load characteristics. Although the changing trend of the adjustment characteristics is exactly the opposite of the external characteristics, for inductive and purely resistive loads, it is increasing, and under capacitive loads, it is generally decreasing.
Rotating magnetic pole (Most synchronous generators): The magnetic poles are on the rotor and the armature windings are on the stator. The rotor is divided into: 1. Hidden pole: high-speed motor (turbine), distributed winding;
2. Salient pole: low-speed motor (turbine), concentrated winding.
Rotary armature (Small capacity or special purpose, such as synchronous motor AC exciter): the magnetic pole is on the stator, and the armature winding is on the rotor.