400kW Synchronous Electric Motor

The rotor speed of a 400kW Synchronous Electric Motor is consistent with the speed of the stator's rotating magnetic field (synchronous speed). It is characterized by stable speed and adjustable power factor, and can be applied in scenarios that require constant speed and large-capacity drive.

Synchronous Electric Motor have very obvious differences from an Asynchronous Electric Motor.
The speed of a 400kW Synchronous Electric Motor is constant (synchronized with the frequency), while the speed of an an asynchronous electric motor is always lower than that of the Synchronous Electric Motor (there is a slip rate, and the speed decreases as the load increases).
The power factor of Synchronous Electric Motor are adjustable (reactive power can be compensated), while the power factor of an asynchronous Electric Motor always lags behind (inductive reactive power needs to be absorbed from the power grid).
Synchronous Electric Motor requires additional excitation systems, have more complex structures and higher costs. An asynchronous Electric Motor have a simple structure and low cost, making them suitable for medium and small capacity scenarios with low requirements for rotational speed accuracy (such as ordinary fans and water pumps).

Technical Data Sheet：

One of our clients uses 400kW Synchronous Electric Motor in nuclear power plants. The core power generation link of a nuclear power plant is completely dependent on the salient-pole synchronous generator (i.e., the steam turbine generator), which is a key hub connecting the nuclear reactor to the power grid. The nuclear energy produced by the nuclear reactor heats the coolant and generates high-temperature and high-pressure steam. Steam drives the steam turbine to rotate at high speed (the rotational speed strictly corresponds to the grid frequency, which is usually 3000rpm/50Hz in China). The steam turbine directly drives the rotor of the synchronous generator to rotate, converting mechanical energy into electrical energy through electromagnetic induction, and eventually feeding it into the national power grid. The rotational speed of the synchronous generator is completely synchronized with the rotational speed of the stator's rotating magnetic field (determined only by the grid frequency and the number of motor poles), which can ensure the stability of the output electrical energy frequency (error ≤±0.2Hz). This is the basic requirement for nuclear power plants to supply power to the grid, avoiding the impact of frequency fluctuations on industrial and residential electrical equipment. The single-unit installed capacity of nuclear power plants is usually at the million-kilowatt level (such as 1000MW, 1200MW). Hidden-pole synchronous generators can easily achieve this level of power output with high efficiency (efficiency can reach over 98% under rated load), reducing energy loss during the nuclear energy conversion process. The generator is equipped with a dual excitation system (such as a main exciter + a backup exciter). Even if one excitation system malfunctions, the other can be immediately switched to prevent the generator from losing step and shutting down, ensuring the continuity of nuclear power supply - this is crucial for nuclear power plants that cannot be easily interrupted. The customer is very satisfied with the performance of our Motor and has promised to place another order for five units

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